390 results on '"Yang, Mengyao"'
Search Results
152. Intelligent auxiliary medical equipment: wearable micro intelligent electrocardiograph design.
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Yang, Mengyao, Li, LinSen, Fu, Lijuan, Wei, Yuanyuan, Wang, Jingwen, Zhang, Xianzheng, Wei, Mengting, and Peng, Qinyi
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- 2023
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153. Application of Power Electronics in Power System
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Yang, Mengyao, primary
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- 2017
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154. The variant at TGFBRAP1 is significantly associated with type 2 diabetes mellitus and affects diabetes‐related miRNA expression.
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Yang, Song, Chen, Xiaotian, Yang, Mengyao, Zhao, Xianghai, Chen, Yanchun, Zhao, Hailong, Liu, Chunlan, and Shen, Chong
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TRANSFORMING growth factors ,TYPE 2 diabetes diagnosis ,MICRORNA ,INSULIN resistance ,GLUCOSE tolerance tests - Abstract
While the transforming growth factor‐β1 (TGF‐β1) regulates the growth and proliferation of pancreatic β‐cells, its receptors trigger the activation of Smad network and subsequently induce the insulin resistance. A case‐control was conducted to evaluate the associations of the polymorphisms of TGF‐β1 receptor‐associated protein 1 (TGFBRAP1) and TGF‐β1 receptor 2 (TGFBR2) with type 2 diabetes mellitus (T2DM), and its genetic effects on diabetes‐related miRNA expression. miRNA microarray chip was used to screen T2DM‐related miRNA and 15 differential expressed miRNAs were further validated in 75 T2DM and 75 normal glucose tolerance (NGT). The variation of rs2241797 (T/C) at TGFBRAP1 showed significant association with T2DM in case‐control study, and the OR (95% CI) of dominant model for cumulative effects was 1.204 (1.060‐1.370), Bonferroni corrected P < 0.05. Significant differences in the fast glucose and HOMA‐β indices were observed amongst the genotypes of rs2241797. The expression of has‐miR‐30b‐5p and has‐miR‐93‐5p was linearly increased across TT, TC, and CC genotypes of rs2241797 in NGT, Ptrend values were 0.024 and 0.016, respectively. Our findings suggest that genetic polymorphisms of TGFBRAP1 may contribute to the genetic susceptibility of T2DM by mediating diabetes‐related miRNA expression. [ABSTRACT FROM AUTHOR]
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- 2019
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155. Bionic mechanical design for lake cleaning.
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Wei, Mengting, Yang, Mengyao, Wen, Xin, Ji, Qingjie, Yang, Haoran, Peng, Qinyi, and Liu, Hong
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- 2023
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156. Effects of Targeted Delivery of Metformin and Dental Pulp Stem Cells on Osteogenesis via Demineralized Dentin Matrix under High Glucose Conditions
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Gao, Xianling, Qin, Wei, Chen, Lingling, Fan, Wenguo, Ma, Tao, Schneider, Abraham, Yang, Mengyao, Obianom, Obinna N., Chen, Jiayao, Weir, Michael D., Shu, Yan, Zhao, Liang, Lin, Zhengmei, and Xu, Hockin H. K.
- Abstract
High glucose condition inhibited osteoblast differentiation could be a main mechanism contributing to the decreased bone repair associated with diabetes. Metformin, a widely prescribed antidiabetic drug, was shown to have osteogenic properties in our previous study. Transplanted mesenchymal stromal cells (MSCs) may differentiate into osteoblasts and promote bone regeneration. Our study aimed to combine the benefits of metformin and MSCs transplantation on osteogenesis in high glucose conditions. We developed demineralized dentin matrix (DDM) as a carrier to target deliver metformin and dental pulp-derived MSCs (DPSCs). We collected clinically discarded teeth, isolated DPSCs from the dental pulp, and prepared the DDM from the dentin. The DDM was observed by scanning electron microscopy and was found to have well-distributed tubes. Then, metformin was loaded into the DDM to form the DDM–Met complex (DDM–Met); DDM–Met released metformin at a favorable concentration. The DPSCs seeded with the DDM–Met in a high glucose medium showed satisfactory attachment and viability together with increased mineralization and upregulated osteogenesis-related genes, including alkaline phosphatase (ALP), osteocalcin (OCN), runt-related transcription factor 2 (Runx2), and osteopontin (OPN). A possible mechanism of the enhanced osteogenic differentiation of DPSCs was explored, and the adenosine 5′-monophosphate (AMP)-activated protein kinase (AMPK) pathway was found to play a role in the enhancement of osteogenesis. DDM–Met appeared to be a successful metformin and DPSC carrier that allowed for the local delivery of metformin and DPSCs in high glucose conditions. DDM–Met–DPSC construct has promising prospects to promote osteogenesis and enhance the much-needed diabetic bone regeneration.
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- 2024
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157. Exosomes from hypoxic pretreated ADSCs attenuate ultraviolet light-induced skin injury via GLRX5 delivery and ferroptosis inhibition.
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Liu, Yanting, Wang, Yawen, Yang, Mengyao, Luo, Jie, Zha, Jindong, Geng, Songmei, and Zeng, Weihui
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SKIN injuries , *EXOSOMES , *ULTRAVIOLET radiation , *REACTIVE oxygen species , *GENE expression , *NUCLEOTIDE sequencing - Abstract
Accumulation studies have found that adipose-derived stem cell (ADSC) exosomes have anti-oxidant and anti-inflammatory characteristics. The current study verified their therapeutic potential to elucidate mechanisms of ADSC exosome actions in ultraviolet B (UVB) light-induced skin injury. Exosomes were isolated from ADSCs and hypoxic pretreated ADSCs. Next-generation sequencing (NGS) was applied to characterize differential mRNA expression. A UV-induced mice skin injury model was generated to investigate therapeutic effects regarding the exosomes via immunofluorescence and ELISA analysis. Regulatory mechanisms were illustrated using luciferase report analysis and in vitro experiments. The results demonstrated that exosomes from hypoxic pretreated ADSCs (HExos) inhibited UVB light-induced vascular injury by reversing reactive oxygen species, inflammatory factor expression and excessive collagen degradation. NGS showed that HExos inhibits UV-induced skin damage via GLRX5 delivery, while GLRX5 downregulation inhibited the therapeutic effect of HExos on UV-induced skin damage. GLRX5 upregulation increased the protective Exo effect on UV-induced skin and EPC damage by inhibiting ferroptosis, inflammatory cytokine expression and excessive collagen degradation. Therefore, the data indicate that HExos attenuate UV light-induced skin injury via GLRX5 delivery and ferroptosis inhibition. [ABSTRACT FROM AUTHOR]
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- 2024
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158. Operational and economic evaluation of ammonia bunkering – Bunkering supply chain perspective.
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Yang, Mengyao and Lam, Jasmine Siu Lee
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GREENHOUSE gas mitigation , *DISCRETE event simulation , *SUPPLY chains , *AMMONIA , *SUPPLY chain management - Abstract
Using ammonia as an alternative marine fuel has been gaining interest in reducing greenhouse gas emissions in the maritime sector. This paper describes the development of a discrete event simulation model for bunker supply chain, emphasising how ammonia bunkering affects the operational and economic performance of the system. The results show that the model is a useful tool for ammonia bunker supply chain management, including the selection of the number and capacity of ammonia bunker supply vessels, bunkering flow rate and ammonia demand. Flow rate has a significant impact on bunkering service time, with an effect of up to 51.3% when it is changed by ±50%. The greater the demand for ammonia, the more significant the impact of ammonia bunkering flow rate on bunkering service time. Moreover, the number of ammonia bunker supply vessels is the most sensitive parameter for annual operational cost, with an effect of up to 15.2%. [ABSTRACT FROM AUTHOR]
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- 2023
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159. Phthalocyanine-based targetable photothermal theragnostic contrast agent for photoacoustic imaging and photothermal therapy.
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Oh, Donghyeon, Park, Sinyoung, Yang, Mengyao, Nah, Yunyoung, Lim, Junha, Li, Xingshu, Kim, Won Jong, Yoon, Juyoung, and Kim, Chulhong
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- 2022
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160. Presence and distribution of triazine herbicides and their effects on microbial communities in the Laizhou Bay, Northern China.
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Zhao, Lingchao, Yang, Mengyao, Yu, Xiaowen, Liu, Lijuan, Gao, Chen, Li, Huaxin, Fu, Sui, Wang, Wei, and Wang, Jun
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HERBICIDES ,MICROBIAL communities ,MARINE pollution ,ATRAZINE ,MARINE ecology ,COMMUNITIES - Abstract
This study investigated the distribution of triazine herbicides in the Laizhou Bay, China and found that the total concentrations of triazine herbicides in the seawater and sediments were 111.15–234.85 ng/L and 0.902–4.661 μg/kg, respectively. Triazine herbicides especially ametryn, atrazine, and simazine were negatively correlated with prokaryote diversity in the seawater. While ametryn, desethylatrazine and desisopropylatrazine had positively significant effects on eukaryotes Dinophyceae, Bacillariophyta, and Cercozoa in the sediments. Moreover, the degree of fragmentation of eukaryotic networks increased dramatically with the increasing numbers of removed nodes, but prokaryotic networks did not change with the decrease of nodes. In addition, the stability analysis and neutral community models revealed that eukaryotes were more sensitive to triazine herbicides than prokaryotes. These results suggest that triazine herbicides might affect the structure and interactions of microbial communities. Therefore, more attentions should be paid to the ecological risk of triazine herbicides in marine ecosystems. [Display omitted] • Eight triazine herbicides (111.2–234.9 ng/L) were detected in the seawater. • Nine triazine herbicides (0.902–4.661 μg/kg) were detected in the sediment. • Triazine herbicides pollution was negatively correlated with dominant microorganisms. • The eukaryotes were more sensitive to triazine herbicides pollution than prokaryotes. • The ecological risk of herbicides pollution in marine ecosystems deserves more attention. [ABSTRACT FROM AUTHOR]
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- 2023
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161. Research Progress and Development Trend of Smart Transmission Line Technologies
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Yang, Mengyao, primary, Wang, Wei, additional, Zhao, Dianquan, additional, and Han, Dong, additional
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- 2011
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162. Study on the Groundwater Resources Distribution in the Old Industrial Base of Northeast China with GIS
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Wang, Ju, primary, Sun, Wei, additional, Shan, Yushu, additional, Zhang, Shengnan, additional, Yang, Mengyao, additional, Hou, Jie, additional, and Fang, Chunsheng, additional
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- 2010
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163. Facile preparation of MnO2–TiO2 nanotube arrays composite electrode for electrochemical detection of hydrogen peroxide.
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Yang, Mengyao, Wu, Zhigang, Wang, Xixin, Yin, Zekun, Tan, Xu, and Zhao, Jianling
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ELECTROCHEMICAL electrodes , *NANOTUBES , *ELECTROCHEMICAL sensors , *ELECTRODE testing , *POTASSIUM permanganate , *HYDROGEN detectors , *HYDROTHERMAL deposits , *HYDROGEN peroxide - Abstract
The MnO 2 -TNTA composite electrodes were obtained through depositing MnO 2 into TiO 2 nanotube arrays (TNTA) by successive ionic layer adsorption reaction (SILAR) and subsequent hydrothermal method. The MnO 2 -TNTA nanocomposites were used as electrochemical sensors for the detection of hydrogen peroxide (H 2 O 2). The preparation conditions of MnO 2 -TNTA electrodes and test conditions affect the electrochemical detection performance significantly. The optimal conditions are listed as follows: the number of SILAR cycles, 6 times; KMnO 4 solution temperature, 50 °C; supporting electrolyte, 0.5 M NaOH. Under these conditions, the MnO 2 -TNTA electrode exhibits the best performance for detecting H 2 O 2. The optimized MnO 2 -TNTA electrode has a minimum detection limit of 0.6 μM (S/N = 3) and a linear range of 5 μM ∼ 13 mM, which is much superior to the previously-reported electrodes. Moreover, the optimized MnO 2 -TNTA electrode possesses high selectivity, excellent stability and good reproducibility in the detection of H 2 O 2. When used in the determination of H 2 O 2 content in actual samples including disinfectant and milk, it also shows good accuracy, ideal recovery (96.00% ∼ 102.67%) and high precision (RSD < 4.0%). [Display omitted] • The MnO 2 -TNTA electrode is fabricated by SILAR and hydrothermal method. • The MnO 2 -TNTA electrode is first used as electrochemical sensor to detect H 2 O 2. • The MnO 2 -TNTA electrode shows excellent electrochemical detection performance. • The MnO 2 -TNTA electrode is used for the analysis of actual samples. [ABSTRACT FROM AUTHOR]
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- 2022
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164. Structure-oriented design strategy to construct NIR AIEgens to selectively combat gram (+) multidrug-resistant bacteria in vivo.
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Li, Haidong, Yang, Mengyao, Kim, Ji Seon, Ha, Jeongsun, Han, Jingjing, Kim, Heejeong, Cho, Yejin, Wang, Jingyun, Nam, Ki Taek, and Yoon, Juyoung
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GRAM-positive bacteria , *MULTIDRUG resistance in bacteria , *ANTIBIOTIC overuse , *ESCHERICHIA coli , *BACTERIA , *METHICILLIN-resistant staphylococcus aureus , *REACTIVE oxygen species - Abstract
Multidrug-resistant (MDR) gram-positive bacteria are an inevitable source of infection for hospitalized patients and one of the reasons for the increased proportion of severe diseases. Therefore, constructing smart agents for specific and effective combating infections in vivo caused by MDR gram-positive strains is very urgent. Herein, we reported a structure-oriented design strategy (SODS) to reasonably construct an organic photo-antimicrobial near-infrared (NIR) AIEgen BDPTV equipped with a phenylboronic acid moiety, which could be bound to the thick peptidoglycan layer of MDR gram-positive bacteria, resulting in a tight distribution with the cell wall in a confined space. Compared to the contrast compounds DQVTA and DPTVN , upon photoirradiation of AIEgen BDPTV , the generation of abundant and highly toxic reactive oxygen species (ROS) irreversibly destroys MDR gram-positive bacteria through photodynamic therapy, which is better than commercial photosensitizers (including methylene blue, chlorin e6, and protoporphyrin IX) and antibiotic (cefoxitin). As a proof of concept, in vitro experimental results showed that methicillin-resistant Staphylococcus aureus (MRSA) were completely killed using AIEgen BDPTV. More importantly, AIEgen BDPTV was capable of successfully combating MRSA -infected wounds of mice, but not Escherichia coli (E. coli)-infected wounds. We hope that this strategy could provide a new method to design powerful AIEgens to avoid the overuse and misuse of antibiotics. In this contribution, based on structure-oriented design strategy, a smart AIEgen BDPTV was rationally developed to selectively combat gram (+) multidrug-resistant bacteria in vivo. [Display omitted] [ABSTRACT FROM AUTHOR]
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- 2022
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165. Metagenomic analysis reveals the relationship between intestinal protozoan parasites and the intestinal microecological balance in calves.
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Fu, Yin, Zhang, Kaihui, Yang, Mengyao, Li, Xiaoying, Chen, Yuancai, Li, Junqiang, Xu, Huiyan, Dhakal, Pitambar, and Zhang, Longxian
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INTESTINAL parasites , *CRYPTOSPORIDIUM , *CALVES , *METAGENOMICS , *POLYMERASE chain reaction , *NUCLEOTIDE sequencing - Abstract
Background: A close connection between a protozoan parasite and the balance of the other gut microbes of the host has been demonstrated. The calves may be naturally co-infected with many parasites, and the co-effects of parasites on other intestinal microbes of calves remain unclear. This study aims to preliminarily reveal the relationship between intestinal parasites and other intestinal microbes in calves. Methods: Fecal samples were collected from four calves with bloody diarrhea, four calves with watery diarrhea, and seven normal calves, and the microbial flora of the samples were analyzed by whole-genome sequencing. Protozoal parasites were detected in the metagenome sequences and identified using polymerase chain reaction (PCR). Results: Cryptosporidium, Eimeria, Giardia, Blastocystis, and Entamoeba were detected by metagenomic analysis, and the identified species were Giardia duodenalis assemblage E, Cryptosporidium bovis, Cryptosporidium ryanae, Eimeria bovis, Eimeria subspherica, Entamoeba bovis, and Blastocystis ST2 and ST10. Metagenomic analysis showed that the intestinal microbes of calves with diarrhea were disordered, especially in calves with bloody diarrhea. Furthermore, different parasites show distinct relationships with the intestinal microecology. Cryptosporidium, Eimeria, and Giardia were negatively correlated with various intestinal bacteria but positively correlated with some fungi. However, Blastocystis and Entamoeba were positively associated with other gut microbes. Twenty-seven biomarkers not only were significantly enriched in bloody diarrhea, watery diarrhea, and normal calves but were also associated with Eimeria, Cryptosporidium, and Giardia. Only Eimeria showed a distinct relationship with seven genera of bacteria, which were significantly enriched in the healthy calves. All 18 genera of fungi were positively correlated with Cryptosporidium, Eimeria, and Giardia, which were also significantly enriched in calves with bloody diarrhea. Functional genes related to parasites and diseases were found mainly in fungi. Conclusions: This study revealed the relationship between intestinal protozoan parasites and the other calf gut microbiome. Different intestinal protozoan parasites have diametrically opposite effects on other gut microecology, which not only affects bacteria in the gut, but also is significantly related to fungi and archaea. [ABSTRACT FROM AUTHOR]
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- 2023
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166. Color constancy using AlexNet convolutional neural network.
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Yang, Mengyao, Xie, Kai, Li, Tong, Ye, Yonghua, and Yang, Zepeng
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- 2021
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167. Influence of reinforcement learning on the inhibitory control of Internet gaming disorder.
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Zhang, Mengyue, Zhao, Chenyue, Zhang, Meng, Mao, Shuangshuang, Yang, Mengyao, Mao, Ziyu, and Xing, Xiaoli
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CONTROL (Psychology) , *REWARD (Psychology) , *GAMING disorder , *RESPONSE inhibition , *REINFORCEMENT learning - Abstract
Reward processing dysfunction and inhibition control deficiency have been observed in Internet gaming disorder (IGD). However, it is still unclear whether the previous reinforcement learning depends on reward/punishment feedback influences on the cognitive inhibitory control of IGD. This study compared the differences between an IGD group and healthy people without game experiences in the probability selection task and the subsequent stop signal task by the method of behavioral experiments, in order to explore whether the reward learning ability is impaired in the IGD group. We also discuss the influence of previous reward learning on subsequent inhibition control. The results showed that (1) during the reward learning phase, the IGD group's accuracy was significantly lower than that of the control group; (2) compared with the control group, the IGD group's reaction times were longer in the transfer phase; (3) for no‐go trials of the inhibitory control phase after reward learning, the accuracy of the reward‐related stimulation in the IGD group was lower than that of punishment‐related or neutral stimulation, but there was no significant difference among the three conditions in the control group. These findings indicated that the reinforcement learning ability of the IGD group was impaired, which further caused the abnormal response to reinforcement stimuli. [ABSTRACT FROM AUTHOR]
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- 2024
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168. Flame Retardant Strategies and Applications of Organic Phase Change Materials: A Review.
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Liu, Mingyong, Qiao, Jiaxin, Zhang, Xiaoguang, Guo, Zijiao, Liu, Xianjie, Lin, Fankai, Yang, Mengyao, Fan, Jiahang, Wu, Xiaowen, and Huang, Zhaohui
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FIREPROOFING , *FIREPROOFING agents , *HEAT storage , *PHASE change materials , *HEAT recovery , *WASTE heat - Abstract
Due to their good chemical and thermal stability, high heat of melting, and suitability within the desired temperature range, organic phase change materials (PCMs) are widely used for cooling electronic devices, new energy utilization, solar thermal power generation, industrial waste heat recovery processes, and greenhouse construction. However, the flammability of organic PCMs has limited their commercial viability. In recent years, researchers have been striving to improve the flame retardancy of organic PCMs through various strategies, raising the question of which modification strategy best enhances the flame retardancy for different types of composite PCMs. Therefore, a comprehensive and timely review is needed to gain insight into the mechanism of action for flame retardant properties enhancement. This article firstly introduces the types of flame retardants and flame retardant mechanism, and briefly introduces the test methods commonly used in the laboratory for the analysis of flame retardant mechanism. Secondly, the strategies for improving the flame retardancy of organic PCMs are systematically summarized, and some scenarios for the application of organic flame‐retardant PCMs are introduced. Eventually, the challenges and future perspectives of the evolution of organic flame retardant PCMs are presented. This review is expected to provide new insights for the rational design of high flame‐retardant organic PCMs. [ABSTRACT FROM AUTHOR]
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- 2024
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169. Stronger Empathy and Better Peer Relationship? One‐Year Cross‐Lagged Panel Analysis in Preschoolers.
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Zeng, Xiao, Xiong, Yao, Mo, Kainian, Yang, Mengyao, Xie, Binglin, and Yan, Zhiqiang
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PANEL analysis , *SOCIAL network analysis , *SOCIAL interaction , *EMPATHY , *PRESCHOOL children - Abstract
ABSTRACT The development of empathy and the establishment of peer relationships significantly influence the quality of preschoolers' social lives. Past research consistently demonstrates a strong correlation between empathy and peer relationships. However, debates persist regarding causality. To provide evidence on this matter, we conducted a year‐long longitudinal study involving 160 preschoolers at T1, with 137 children (mean age = 60.99 months,
SD = 3.51; 66 males) retained at T2, 1 year later. Our study employed a two‐wave design and cross‐lagged panel analysis. Data on empathy and peer relationships were collected through empathy story tasks and peer nominations. For the analysis of peer nominations, we selected three centrality measures from social network analysis: degree centrality (number of direct friendships), closeness centrality (proximity between network members), and betweenness centrality (control/mediation of information exchange). Results from the cross‐lagged panel analysis reveal that preschoolers' affective and cognitive empathy at T1 positively and significantly predict peer relationships at T2. Specifically, both forms of empathy predict degree centrality and closeness centrality. Additionally, hierarchical linear modeling indicates that, even after controlling for affective empathy, cognitive empathy significantly predicts both degree centrality and closeness centrality at T2. These findings underscore the importance of nurturing empathy, especially cognitive empathy, to enhance peer relationships among preschoolers. Consequently, educators can play a vital role in improving peer relationships by intervening in empathy development, promoting greater social interaction. [ABSTRACT FROM AUTHOR]- Published
- 2024
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170. Preparation and corrosion resistance of β-Al2O3–MgAl2O4 multiphase materials for synthesising Li-ion battery cathode materials.
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Liu, Mingyong, Liu, Xianjie, Lin, Fankai, Fan, Jiahang, Yang, Mengyao, Guo, Zijiao, Ma, Qianchao, Wu, Xiaowen, and Huang, Zhaohui
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THERMAL shock , *COMPOSITE materials , *HEAT treatment , *CORROSION resistance , *SODIUM carbonate - Abstract
The sagger, primarily composed of aluminum-silicon, serves as an essential vessel in the sintering process of ternary lithium battery anode materials (LiNi x Co y Mn 1-x-y O 2 , LNCM). However, the acidic oxide SiO 2 in the sagger material readily reacts with Li 2 O in the cathode material, forming substances such as LiAlO 2 or LiAlSiO 4 , resulting in volume expansion, which makes the sagger spalled and damaged. In this study, β-Al 2 O 3 –MgAl 2 O 4 multiphase materials with excellent alkali resistance were prepared using the high-temperature solid-state method. The effects of anhydrous sodium carbonate content and heat treatment temperature on the properties of the composites were investigated, and the thermal shock resistance of the specimens was evaluated by the water-rapid-cooling method, as well as the LNCM corrosion resistance of the specimens was evaluated by the static crucible method. The results showed that the overall performance of the specimens was the best at a anhydrous sodium carbonate content of 6 wt%, with a compressive strength of 57.50 MPa and a flexural strength of 42.49 MPa after firing at 1600 °C for 4 h. The strength retention of the specimens was 33.21 % after one thermal shock at a thermal shock temperature of 900 °C. The specimens showed excellent resistance to erosion as there were no obvious erosion traces on the surface of the specimens after undergoing five cycles of erosion. [ABSTRACT FROM AUTHOR]
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- 2024
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171. Redox-responsive nanoparticles self-assembled from porphyrin-betulinic acid conjugates for chemo- and photodynamic therapy.
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Özdemir, Zulal, Yang, Mengyao, Kim, Gyoungmi, Bildziukevich, Uladzimir, Šaman, David, Li, Xingshu, Yoon, Juyoung, and Wimmer, Zdeněk
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PHOTODYNAMIC therapy , *REACTIVE oxygen species , *NANOPARTICLES , *CANCER cells , *PORPHYRINS , *BETULINIC acid - Abstract
The redox-responsive nanoparticle (NanoP-ss-BA) is designed by linking the porphyrin derivative (P) to the naturally occurring betulinic acid (BA) through a disulphide bond. A GSH triggered disassembly of NanoP-ss-BA effectively promotes a singlet oxygen (1O 2) production, but also releases lipophilic anticancer drug, BA in situ. Beside this, high phototoxicity of NanoP-ss-BA serves it as a good candidate for photodynamic therapy (PDT). When the prepared NanoP-ss-BA is exposed to a reductive environment, the cleavage of the disulphide bonds facilitates the disassembly of nanostructure causing a release of P and BA , and restores the photoactivity of P. In vitro cell studies revealed that NanoP-ss-BA exhibits significant phototoxicity against cancer cells (4T1). [Display omitted] • Designing redox-responsive nanoparticles by linking porphyrin to betulinic acid through a disulphide bond. • Designing a triggered disassembly of NanoP-ss-BA that promotes singlet oxygen. • Suggesting NanoP-ss-BA as a candidate for photodynamic therapy. [ABSTRACT FROM AUTHOR]
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- 2021
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172. Does Taobao increase the popularity of counterfeit purchasing in China?
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Yang, Mengyao and Yang, Mengyao
- Abstract
Both The Office of the United States Trade (USTR) and the European Commission reported that the total number of seized counterfeit products from China significantly surpass those from other countries (Yang, 2016). With the development of technology especially the popularity of Internet in China, Chinese young consumers who is skilful in using online shopping prefer to purchase counterfeits online and thereby solving counterfeiting issues in China seems more difficult than ever. In order to solve counterfeiting problem, two main subjected should be concentrated, that is, the suppliers and the buyers. However, sometimes, suppliers can also be considered as buyers because some of them buy counterfeits from others and reproduce or resell to the next consumers. Thus, this dissertation seeks to ascertain whether young consumers are the most potential consumers to buy online counterfeits and their motivations of purchasing counterfeits on Taobao which is an important B2C and C2C online shopping platform of Alibaba. This study is going to examine the motivations through four aspects, namely personal, product, social and place factors and also the contributions of Taobao in increasing the prevalence of counterfeits in China will be discussed in the four motivations. The research was conducted by using interviews as a research method and followed an interview guide. Twenty participants were involved in the interviews and the snowball sampling technique was utilised. Finally, the data was analysed by using thematic analyses.
173. Diagnostic and grading criteria for androgenetic alopecia using dermoscopy.
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Wang, Yuting, Ding, Wei, Yao, Manxue, Li, Yan, Wang, Miaomiao, Wang, Lu, Li, Zonghui, Sun, Shiquan, Yang, Mengyao, Zhu, Yueqian, and Zhou, Naihui
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DERMOSCOPY , *BALDNESS , *ALOPECIA areata , *SENSITIVITY & specificity (Statistics) , *EARLY diagnosis - Abstract
Objectives: To establish accurate and objective dermoscopic diagnostic criteria and grading standards for males and females with androgenetic alopecia (AGA). Methods: Twenty patients each with AGA, diffuse alopecia areata, telogen effluvium, and healthy controls were enrolled in the current study. In addition, 60 patients with grades F1/V1, F2/V2, and F3/V3 AGA (20 cases each) were enrolled. The patients underwent dermoscopic examinations. The sensitivity and specificity of the diagnostic criteria were based on the 60 AGA and 60 non‐AGA. In addition, 150 patients diagnosed with AGA clinically and by dermoscopy were enrolled to calculate the accuracy of the grading criteria. Results: The diagnostic criteria included primary, secondary, and exclusion criteria. The grading criteria included three indices, which divided the severity of AGA into grades 1, 2, and 3. The sensitivity and specificity of the diagnostic criteria were 98.3% and 96.7% respectively. The accuracy of grade 1, 2, and 3 dermoscopic grading criteria were 96%, 92%, and 100% respectively, with a total accuracy of 96%. Limitations: To test the diagnostic and grading criteria, more patients need to be collected. Conclusions: The dermoscopic diagnostic and grading criteria are objective with good accuracy, which could provide a reasonable basis for the early diagnosis, grading treatment, and improved prognosis for AGA. [ABSTRACT FROM AUTHOR]
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- 2024
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174. MVTr: multi-feature voxel transformer for 3D object detection.
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Ai, Lingmei, Xie, Zhuoyu, Yao, Ruoxia, and Yang, Mengyao
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OBJECT recognition (Computer vision) , *TRANSFORMER models , *CONVOLUTIONAL neural networks , *IMAGE segmentation , *POINT cloud - Abstract
Convolutional neural networks have become a powerful tool for partial 3D object detection. However, their power has not been fully realized for focusing on global information, which is crucial for object detection. In this paper, we resolve the problem with a multi-feature voxel transformer (MVTr), an architecture that extracts long-range relationship features through self-attention between multi-feature voxels. In general, converting a point cloud to a voxel representation can reduce a lot of computation, but it would take a long process for the attention network to pay attention to the car voxels in a huge 3D real scene. To this end, we propose a semantic voxel module which takes semantic voxels as input and cooperates with a sparse and a non-empty voxel module to extract features. And the semantic voxels are generated from image segmentation and point cloud projection, which only retains a large number of car voxels. To further enlarge the attention range while maintaining a favorable computational, we propose two attention mechanisms for multi-head attention: local attention and stumpy attention. Finally, we propose the fusion attention module, which can add channel attention and spatial attention to the 2D backbone network. MVTr combines the semantic information of the image and the 3D information of the point cloud and can be applied to most 3D object detection tasks. Experimental results on KITTI dataset show that our method is effective, and the precision has significant advantages compared to other similar feature fusion-based methods. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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175. The co-presence of polystyrene nanoplastics and ofloxacin demonstrates combined effects on the structure, assembly, and metabolic activities of marine microbial community.
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Liu, Mingjian, Yu, Xiaowen, Yang, Mengyao, Shu, Wangxinze, Cao, Furong, Liu, Qian, Wang, Jun, and Jiang, Yong
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MICROBIAL communities , *POISONS , *POLYSTYRENE , *POLLUTANTS - Abstract
Nanoplastic is increasing in environments and can address toxic effects on various organisms. Particle size, concentration, and surface functionalization most influence nanoplastic toxicity. Besides, nanoplastic can adsorb other contaminants (e.g., antibiotics) to aggravate its adverse effects. The combined effects of nanoplastics and antibiotics on planktonic/benthic microbial communities, however, are still largely unknown. In this study, the combined effects of polystyrene nanoplastic and ofloxacin on the structure, assembly, and metabolic activities of marine microbial communities were investigated based on amplicon sequencing data. The results mainly demonstrate that: (1) nanoplastic and ofloxacin have greater impacts on prokaryotic communities than eukaryotic ones; (2) niche breadths of planktonic prokaryotes and benthic eukaryotes were shrank with both high nanoplastic and ofloxacin concentrations; (3) increased ofloxacin mainly reduces nodes/edges of co-occurrence networks, while nanoplastic centralizes network modularity; (4) increased nanoplastic under high ofloxacin concentration induces more differential prokaryotic pathways in planktonic communities, while benthic communities are less influenced. The present work indicates that co-presence of nanoplastics and ofloxacin has synergistic combined effects on community structure shifts, niche breadth shrinking, network simplifying, and differential prokaryotic pathways inducing in marine microbial communities, suggesting nanoplastics and its combined impacts with other pollutions should be paid with more concerns. [Display omitted] • Combined effects of 500 nm non-functionalized PS-NP and OFL were investigated. • NP & OFL have greater impacts on diversity/structure of prokaryotes than eukaryotes. • Co-presence of NP and OFL shrinks niche breadths of certain communities. • High OFL reduces nodes/edges of network, high NP centralizes nodes to fewer modules. • High NP & OFL concentrations induce more differential pathways in planktonic samples. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
176. Characterization of thermal behavior of two types of kaolin in China by ultrafast Joule heating combined with XRD, FT-IR, TG-DSC and SEM.
- Author
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Fan, Jiahang, Liu, Xianjie, Liu, Mingyong, Yang, Mengyao, Jiang, Yuena, Mi, Ruiyu, Min, Xin, and Huang, Zhaohui
- Subjects
- *
PHASE transitions , *BEHAVIORAL assessment , *MULLITE , *X-ray diffraction , *MUSCOVITE , *KAOLIN - Abstract
• Kaolin thermal behavior was investigated by ultrafast Joule heating & thermal analysis. • Kaolinite dehydroxylation completion of HKaol at higher temperatures than SKaol. • The mullite transformation temperature of HKaol is lower than SKaol. • The mullite crystallinity of HKaol is better than SKaol at 1200 °C. Thermal behavior of sandy kaolin selected from Guangxi and hard kaolin from Inner Mongolia in China were characterised by ultrafast Joule heating combined with XRD, FT-IR, TG-DSC and SEM. The results indicated that the sandy kaolin was composed of kaolinite, muscovite and quartz, and hard kaolin was predominantly composed of kaolinite, with minor quantities of anatase. During ultrafast Joule heating, the layered structure of kaolinite of sand kaolin was destroyed, and all hydroxyl groups were lost at 700 °C, while dehydroxylation completion of the hard kaolin at higher temperature, accompanied by rupture of lamellar kaolinite. Muscovite disappeared completely and accompanied by the formation of mullite at 1100 °C, while quartz is relatively unaffected, resulting in the sandy kaolin consisting of quartz and mullite phases at 1200 °C. In contrast, the transformation rate and crystallinity of mullite phase of hard kaolin was significantly higher than that of sandy kaolin. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
177. Differentiated local controls for distributed generators in active distribution networks considering cyber failures.
- Author
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Liu, Wenxia, Lu, Yu, Yang, Mengyao, Fu, Mengdi, and Wang, Lingfeng
- Subjects
- *
FAILURE mode & effects analysis , *INTERVAL analysis , *DISTRIBUTED power generation , *ALGORITHMS , *MATHEMATICAL optimization , *DISTRIBUTED algorithms - Abstract
• A novel optimization model is proposed to enable differentiated local control strategies for distributed generators with communication failures. • The relationship between cyber failure scenarios and cyber link states is modeled in detail. • Interval mathematics and intelligent algorithm are adopted to solve the optimization problem. • The influences of cyber system topologies on the control strategies are analyzed. The dependence of distribution network operation on cyber systems becomes heavier as the amount of grid connected distributed generation (DG) continually increases in the active distribution system (ADS). In order to reduce the operational risks under cyber failure scenarios, this paper proposes an optimization model to enable differentiated local control strategies for DGs with communication failures. First, the correspondence model between cyber failure scenarios and cyber link states is established based on the failure mode effect analysis (FMEA) method. Then a bi-level multi-objective optimization model of differentiated local control strategies for DGs is proposed, which considers the uncertainties of cyber failure scenarios and the uncertainties in power generations and load demands. It aims at minimizing the operational risks including voltage deviation and overcurrent (load curtailment) situations. Interval mathematics and intelligent optimization algorithm are adopted for solving the optimization problem. Finally, a test system is established to validate the effectiveness of the proposed local control strategies. Also, the influences of cyber system topologies on the control strategies are analyzed. This study is instrumental in devising effective operational strategies for DGs in ADS. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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- View/download PDF
178. Leveraging gas generation for Humidity-Responsive release of Thyme essential oil via nanofiber film for fresh fruits.
- Author
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Jiao, Xiangyu, Chong, Xiaona, Du, Haiyu, Bian, Xiaochun, Yang, Mengyao, Liu, Xinru, Zhu, Zhu, and Wen, Yongqiang
- Subjects
- *
ESSENTIAL oils , *PRESERVATION of fruit , *THYMES , *FRUIT , *MICROBIAL growth , *STRAWBERRIES , *GASES , *NANOFIBERS - Abstract
• Humidity-responsive nanofiber film for Thyme control release. • Innovative gas generation in nanofibers for sensitive thyme control release. • The nanofiber film displays remarkable attributes for fruit preservation. • Gas-enhanced release offers new insights for nanofiber-based controlled release designs. The preservation of fruits using slow-release packaging for Thyme essential oil (THY) encounters a significant challenge associated with premature release. Therefore, the development of a controlled release system for essential oils is essential to enhance preservation and reduce wastage. This study introduces a novel humidity-responsive nanofiber film enhanced by gas generation for controlled THY release. This film can generate CO2 gas within its nanofibers in high humidity environments, facilitating the release of loaded THY. The film exhibits excellent humidity-responsive release properties and possesses notable antimicrobial and antifungal characteristics. It effectively extends the shelf life of strawberries, inhibits microbial growth, reduces weight loss, and mitigates hardness reduction. The humidity-responsive nanofiber film effectively addresses the issue of premature THY release, presenting significant potential for fruit preservation applications. Furthermore, this gas-enhanced release approach enhances the sensitivity of stimulus-responsive release, providing novel insights into the design of nanofiber-based controlled release systems. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
179. Bunkering for change: Knowledge preparedness on the environmental aspect of ammonia as a marine fuel.
- Author
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Chen, Mengli, Jiang, Shan, Han, Aiqin, Yang, Mengyao, Tkalich, Pavel, and Liu, Ming
- Published
- 2024
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180. From hydroxyl group to carbonyl group: Tuning the supercapacitive performance of holey graphene.
- Author
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Xu, Maodan, Wang, Xixin, Li, Ziqing, Yang, Mengyao, and Zhao, Jianling
- Subjects
- *
CARBONYL group , *HYDROXYL group , *GRAPHENE , *FUNCTIONAL groups , *SODIUM borohydride , *LITHIUM cells , *DIFFUSION - Abstract
• Nanoholes were introduced in graphene using sulfate radicals. • The directional tuning of the content of hydroxyl and carbonyl group was achieved. • Higher carbonyl group content leads to smaller ion diffusion resistance and higher specific capacitance. • Higher hydroxyl group content results in better electrical conductivity and wider operating potential window. • Supercapacitor based on ROGO-2 has the high energy density of 22 Wh·Kg−1. Both hydroxyl group and carbonyl group are the inborn active sites on graphene for energy storage. However, it is difficult to distinguish the definite influence of these functional groups on the supercapacitive performance of graphene due to the considerable changes of total oxygen content (TOC) when adjusting the content of hydroxyl group and carbonyl group on graphene. In this paper, holey graphene was prepared by reoxidation method with ammonium persulfate as oxidant. During the reducing process, four kinds of reductant (formaldehyde, sodium borohydride, vitamin C and glucose) were used to optimize the TOC of graphene. Then, the directional tuning of the content of hydroxyl group and carbonyl group on graphene under a stable TOC was achieved by controlling the addition amount of specific reductant. Results from morphological and electrochemical analysis suggest that high carbonyl content leads to a fluffier graphene structure, bigger specific surface area, higher specific capacitance and lower ion diffusion resistance while high hydroxyl group content results in wider operating potential window and better electrical conductivity. After balancing the content of hydroxyl and carbonyl group in the holey graphene, the assembled supercapacitor owns the high energy density of 22 Wh·Kg−1 and excellent cycling performance (no capacity loss after 10 000 charge-discharge cycles). [Display omitted] [ABSTRACT FROM AUTHOR]
- Published
- 2024
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- View/download PDF
181. A review on smart active packaging systems for food preservation: Applications and future trends.
- Author
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Du, Haiyu, Sun, Xiaoli, Chong, Xiaona, Yang, Mengyao, Zhu, Zhu, and Wen, Yongqiang
- Subjects
- *
ACTIVE food packaging , *FOOD preservation , *THYMOL , *PACKAGING materials , *FOOD waste , *CHLORINE dioxide , *SMART materials - Abstract
A large amount of food is wasted throughout the supply chain, thus developing suitable active packaging materials can alleviate food waste and extend the shelf life. However, few active packaging can release functional molecules (e.g., thymol, eugenol, cinnamaldehyde, chlorine dioxide, sulfur dioxide, 1-methylcyclopropene, etc.) at the required time, required space, and required quality, which may lead to greatly reduced effectiveness. More seriously, the overuse of some functional molecules even threatens human health. It is vital to develop active packaging materials that can release functional molecules smartly. Smart active packaging provides a new approach to designing innovative active packaging systems due to their ability to respond to changes in the storage microenvironment. Compared with traditional active packaging, smart active packaging can better provide measures according to local conditions for achieving stimuli-responsive release. This review presented the latest advances in smart active packaging nowadays, including stimuli-responsive mechanisms and stimuli sources for designing smart active packaging systems such as pH, enzyme, humidity, temperature, and light. This review also discussed the challenges and possible solutions for further developing smart active packaging systems. Smart active packaging can achieve the on-demand release of functional molecules, which is essential to avoid the risks caused by excessive and premature release. Several novel approaches, such as material safety evaluation and response sensitivity enhancement, could be considered for further designing active packaging systems that are more suitable for real-life production requirements. [Display omitted] • Smart active packaging systems respond to the storage microenvironment. • Smart active packaging systems achieve on-demand release. • A list of applications that may be implemented in active packaging materials is provided. • Challenges and solutions for smart active packaging are synthesized. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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182. Improved hydrothermal stability of Cu-SAPO-18 by Sm modification in the selective catalytic reduction of NOx with NH3.
- Author
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Ming, Shujun, Li, Yan, He, Guoqiang, Yang, Mengyao, Hu, Xinyu, Pang, Lei, Guo, Yanbing, and Li, Tao
- Subjects
- *
CATALYTIC reduction , *COPPER , *CHEMICAL properties , *SAMARIUM , *COPPER oxide , *CATALYSTS - Abstract
The Cu-SAPO-18 catalyst is efficient for the selective reduction of NO x with NH 3 reaction. Nonetheless, enhancement of the hydrothermal stability of the Cu-SAPO-18 catalyst is needed to satisfy the stringent emission regulations. Sm with partially occupied 4 f orbitals and unoccupied 5d orbitals exhibits excellent physical and chemical properties and is often used as a catalyst promoter in catalytic reactions. In this study, we introduced Sm to Cu-SAPO-18 by a hydrothermal method, and when the added amount of Sm was 0.78 wt%, there was a significant improvement in hydrothermal stability. After Sm introduction, there was a decrease in Si(4Si, 0Al) amount and in unstable Cu(OH)+-Z concentration, thus inhibiting the formation of CuO species during hydrothermal aging. Simultaneously, the Sm replaced the hydrogens of a certain amount of Si–OH–Al bonds, stabilizing the Si–O–Al bonds and alleviating the Cu-SAPO-18 dealumination. Besides, after hydrothermal aging, there was an increase of isolated Cu2+ content in Sm 0.78 /Cu-SAPO-18, consequently promoting the adsorption of NH 3 and NO x species and enhancing the Langmuir–Hinshelwood reaction rate. [Display omitted] [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
183. Accidental release of ammonia during ammonia bunkering: Dispersion behaviour under the influence of operational and weather conditions in Singapore.
- Author
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Ng, Clara Kay Leng, Liu, Ming, Lam, Jasmine Siu Lee, and Yang, Mengyao
- Subjects
- *
WEATHER , *AMMONIA , *ATMOSPHERIC ammonia , *ATMOSPHERIC pressure , *DISPERSION (Chemistry) , *MARINE ecology - Abstract
Ammonia is identified as a potential marine fuel, and ammonia bunkering will take place in major bunkering ports, including Singapore. Due to its toxic nature, any accidental release of ammonia into the environment during bunkering operation has a risk of spreading rapidly and causing injury to the personnel in the vicinity and damage to the marine ecosystem. This safety study simulates how key operational parameters affect ammonia dispersion and the consequences. The results show that bunkering ammonia stored in fully-refrigerated tanks as an atmospheric pressure saturated liquid is the safest, and the severity of the consequence increases significantly with a release height of more than 5 m. A vertical release of ammonia results in the most severe consequence and shall be avoided at all times. Reducing the release duration and transfer flow rate can reduce the severity significantly. Based on the scenario used in this study, ammonia cloud disperses over a longer distance over water due to the high vaporisation rate driven by the large amount of heat generated from the dissolution of ammonia in seawater. The dispersion of ammonia over the sea spreads over a larger area during the day than at night. [Display omitted] • Ammonia release and dispersion simulation for ammonia bunkering in Singapore. • Insights on lethality footprint of ammonia dispersion over sea compared to land. • Operational measures to reduce lethality footprint of accidental ammonia release. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
184. Defect induced tunable nitrogen configuration in holey graphene for enhanced supercapacitive performance.
- Author
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Xu, Maodan, Wang, Xixin, Li, Ziqing, Tan, Xu, Yang, Mengyao, and Zhao, Jianling
- Subjects
- *
WRINKLE patterns , *SUPERCAPACITOR electrodes , *GRAPHENE , *X-ray photoelectron spectroscopy , *POWER density , *NITROGEN , *ENERGY density , *SCANNING electron microscopy - Abstract
Nitrogen (N) doped graphene has attracted various attention in many fields due to its adjustable physicochemical properties. However, directional control of graphitic N content in graphene sheets under mild conditions without decreasing the total N content remains a challenge. Here, by combining the defect engineering and lattice restoring agent, tuning the graphitic N contents in a wide range can be achieved at low temperature. X-ray photoelectron spectroscopy (XPS) was used for identifying the N configuration and N content. The content of total N changes from 5.62% to 6.61%, and the content of graphitic N changes from 10.73% to 82.34% with the increase of defects in graphene sheets. Results from electrochemical impedance spectroscopy (EIS) suggest that the ion diffusion capacity increases with the increasing defect level. Results from scanning electron microscopy (SEM) suggest that higher defect level leads to smaller wrinkle structure. Nitrogen adsorption-desorption and electrochemical tests suggest that the specific pore volume, specific surface area and specific capacitances of the optimum sample are 4.35, 2.06 and 1.89 times higher than those samples without defect-introducing- treatment. The supercapacitor assembled with thus modified graphene has a high energy density of 13.8 Wh·Kg−1 and a high power density of 13 000 W·Kg−1. Moreover, the assembled supercapacitor holds a high capacitance retention of 86.8% after 10,000 charge-discharge cycles at 20 A·g−1. This simple and effective method of tuning surface chemistry of graphene provides a reference for the functionalization of graphene. [Display omitted] • Low temperature pre-oxidation method was developed to generate more defects in graphene lattice. • The N content and ratio of N species in NHG can be easily tuned by adjusting oxidation degree. • The specific capacitance of NHG-0.5 is 1.89 times higher than that of blank sample. • The specific capacitance retention of NHG-0.5 is 100% after 10,000 charge-discharge cycles at 10 A g−1. • The assembled supercapacitor holds a high energy density of 13.8 Wh Kg−1, and a high power density of 13,000 W Kg−1. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
185. Preparation of shaped binderless mordenite catalysts with controllable crystal sizes and their carbonylation performance.
- Author
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Liu, Wenrong, Wang, Yaquan, Sun, Chao, Lu, Jiaxin, Wu, Shuhui, Shi, Mingxue, Bu, Lingzhen, Wang, Zhiqiang, Zhi, Yaqiong, and Yang, Mengyao
- Subjects
- *
MORDENITE , *CARBONYLATION , *BRONSTED acids , *METHYL ether , *CATALYSTS , *ZEOLITES - Abstract
A series of shaped binderless mordenite (MOR) zeolites were prepared through hydrothermal transformation with commercial MOR zeolite as seeds and aluminosilicate as raw materials. To investigate the effect of alkalinity on the crystallization process, samples with different Na 2 O/SiO 2 ratios from 0.041 to 0.12 were synthesized and characterized by XRD, SEM, N 2 adsorption-desorption, NH 3 -TPD, ICP-OES and pyridine adsorption-infrared measurements. It was surprisingly found that alkalinity plays a pivotal role in the formation of the binderless MOR zeolites. At Na 2 O/SiO 2 of 0.041, MOR zeolite could not be formed. Slightly increasing the Na 2 O/SiO 2 to 0.043 and upwards, the binderless MOR zeolite was formed. XRD patterns and SEM images revealed that the primary MOR zeolite particle size increased from 104 nm to 266 nm with the Na 2 O/SiO 2 ratio increasing from 0.043 to 0.10. Further increasing Na 2 O/SiO 2 ratio to 0.12 led to the formation of 0.6–1.6 μm micro-sized crystals. NH 3 -TPD and pyridine-adsorbed IR results indicated that the amount and strength of Brønsted acid sites in 8-membered ring channel (8-MR) decreased with the Na 2 O/SiO 2 ratio increasing to up to 0.10. Superior catalytic performance in dimethyl ether carbonylation was observed on the catalyst with a Na 2 O/SiO 2 ratio of 0.043, which exhibited the shortest diffusion path and highest 8-MR Brønsted acid amounts. This work provides a practical way of preparing and optimizing shaped binderless zeolites. [Display omitted] • Binderless MOR zeolites were synthesized via hydrothermal conversion. • Alkalinity played a pivotal role in the formation of binderless MOR zeolite. • The morphology and acid properties can be controlled by adjusting the alkalinity. • Binderless MOR zeolites exhibited high catalytic performance on DME carbonylation. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
186. Community assembly and co-occurrence network complexity of pelagic ciliates in response to environmental heterogeneity affected by sea ice melting in the Ross Sea, Antarctica.
- Author
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Yu, Xiaowen, Li, Xianrong, Liu, Qian, Yang, Mengyao, Wang, Xiaoxiao, Guan, Zhenyu, Yang, Jinpeng, Liu, Mingjian, Yang, Eun Jin, and Jiang, Yong
- Published
- 2022
- Full Text
- View/download PDF
187. Effect of annealing temperature on texture and residual stress of Ti-6Al-4V alloy seamless tubing processed by cold rotary swaging.
- Author
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Yuan, Lihong, Wang, Wenrui, Li, Yun, Yang, Mengyao, Zhang, Hui, and Zhang, Wangfeng
- Subjects
- *
TUBES , *TEMPERATURE effect , *TITANIUM alloys , *ALLOY texture , *ALLOYS - Abstract
The thin-walled seamless Ti-6Al-4V alloy tubing was prepared by cold rotary swaging (RS) with a 40% wall reduction. The microstructure, texture and residual stress of the tubing samples under different annealing temperatures were investigated. The results show that the grains of the tubing samples after RS are obviously refined and streamlined. The maximum density level displayed in the cut of orientation distribution function (ODF) increases from 4.51 to 8.32, with a basal tilt angle of 10° around the radial direction of the tubing, which indicates that the radial texture of the Ti-6Al-4V alloy tubing become stronger after RS. Additionally, the post-swaging annealing at 400 °C and 500 °C for 2.5 h were adopted to relieve the residual stress of the tubing samples. The former can just relieve at most 80% of the residual stress, while the latter can relieve 97% of the residual stress to achieve an almost stress-free state. Hence, it is thought that the annealing at 500 °C can achieve the better effect to relief the residual stress. • The thin-walled Ti-6Al-4V alloys seamless tubing can be prepared by cold-RS with wall thickness deformation rate of 40%. • Cold rotary swaging can remarkably refine the grain sizes of Ti-6Al-4V alloy tubing in the radial direction. • The favorable radial texture of Ti-6Al-4V titanium alloy tubing is formed after RS.. • Annealing at 500℃ for 2.5 h can fully eliminate the residual stress of the Ti-6Al-4V tubing without affecting the texture. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
188. Test method for residual stress analysis of the inner surface of small caliber Ti-3Al-2.5V tubing by X-ray diffraction.
- Author
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Wang, Wenrui, Yuan, Lihong, Li, Yun, Yang, Mengyao, Zhang, Hui, and Zhang, Wangfeng
- Subjects
- *
TUBES , *X-ray diffraction , *ELECTRIC metal-cutting , *RESIDUAL stresses , *TEST methods , *X-ray tubes , *SURFACE analysis - Abstract
The residual stresses of Ti-3Al-2.5V tubing have effects on both fatigue performance and stress corrosion resistance. The inner surface, which directly contacts the hydraulic fluid of the aircraft, is the working surface of Ti-3Al-2.5V aerospace hydraulic tubing and fatigue cracks probably initiate on the inner surface. However, measuring residual stresses on the inner surface of small caliber tubing is difficult using X-ray diffraction at diffraction angles (2 θ) of higher than 120° because the X-rays would be shaded by the outer surface. In this work, the as-received Ti-3Al-2.5V tubing was transversely cut using an electric discharge machine to obtain a sample having a length that was suitable for subsequent measurements and as long as possible to avoid stress relief. Then a diffractometer with Cu Kα radiations was used to scan the lattice planes {103} at the 2 θ of 70.631° for the inner surface stresses of the sample. In particular, to avoid shading effects, we let the incident X-rays enter from one end of the sample and let the diffracted radiations exit from the other end. This work is of theoretical significance and application value for optimizing stress relief annealing process and for X-ray stress analysis of titanium and other metallic tubing. • The residual stress on the inner surface of small caliber Ti-3Al-2.5V tubing was measured by X-ray diffraction. • We let the incident X-rays enter from one end of the tubing sample and let the diffracted X-rays exit from the other end. • It can be reliable and time-saving to measure residual stresses by reflections at lower 2θ by X-ray diffraction. • This work is beneficial for optimizing stress relief annealing process and for X-ray stress analysis of metallic tubing. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
189. Conversion of albumin into a BODIPY-like photosensitizer by a flick reaction, tumor accumulation and photodynamic therapy.
- Author
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Yang M, Kim Y, Youn SY, Jeong H, Shirbhate ME, Uhm C, Kim G, Nam KT, Cha SS, Kim KM, and Yoon J
- Subjects
- Animals, Humans, Mice, Cell Line, Tumor, Mice, Inbred BALB C, Reactive Oxygen Species metabolism, Mice, Nude, Albumins chemistry, Albumins metabolism, Neoplasms drug therapy, Neoplasms pathology, Neoplasms metabolism, Photosensitizing Agents chemistry, Photosensitizing Agents pharmacology, Photosensitizing Agents therapeutic use, Photochemotherapy methods, Boron Compounds chemistry
- Abstract
The accumulation of photosensitizers (PSs) in lesion sites but not in other organs is an important challenge for efficient image guiding in photodynamic therapy. Cancer cells are known to express a significant number of albumin-binding proteins that take up albumin as a nutrient source. Here, we converted albumin to a novel BODIPY-like PS by generating a tetrahedral boron environment via a flick reaction. The formed albumin PS has almost the same 3-dimensional structural feature as free albumin because binding occurs at Sudlow Site 1, which is located in the interior space of albumin. An i.v. injection experiment in tumor-bearing mice demonstrated that the human serum albumin PS effectively accumulated in cancer tissue and, more surprisingly, albumin PS accumulated much more in the cancer tissue than in the liver and kidneys. The albumin PS was effective at killing tumor cells through the generation of reactive oxygen species under light irradiation. The crystal structure of the albumin PS was fully elucidated by X-ray crystallography; thus, further tuning of the structure will lead to novel physicochemical properties of the albumin PS, suggesting its potential in biological and clinical applications., Competing Interests: Declaration of competing interest The authors declare no competing financial interest., (Copyright © 2024 Elsevier Ltd. All rights reserved.)
- Published
- 2025
- Full Text
- View/download PDF
190. Time-Controlled Authentication Strategies for Molecular Information Transfer.
- Author
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Hu M, Yang M, Cheng X, and Wu T
- Subjects
- DNA chemistry, DNA, Catalytic chemistry, DNA, Catalytic metabolism, Nanotechnology methods, Computer Security
- Abstract
Modern cryptography based on computational complexity theory is mainly constructed with silicon-based circuits. As DNA nanotechnology penetrates the molecular domain, utilizing molecular cryptography for data access protection in the biomolecular domain becomes a unique approach to information security. However, building security devices and strategies with robust security and compatibility is still challenging. Here, this study reports a time-controlled molecular authentication strategy using DNAzyme and DNA strand displacement as the basic framework. A time limit exists for authorization and access, and this spontaneous shutdown design further protects secure access. Multiple hierarchical authentications, temporal Boolean logic authentication, and enzyme authentication strategies are constructed based on DNA networks'good compatibility and programmability. This study gives proof of concept for the detection and protection of bioinformation about single nucleotide variants and miRNA, highlighting their potential in biosensing and security protection., (© 2024 Wiley‐VCH GmbH.)
- Published
- 2024
- Full Text
- View/download PDF
191. Enhancement of acyl-CoA precursor supply for increased avermectin B1a production by engineering meilingmycin polyketide synthase and key primary metabolic pathway genes.
- Author
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Yang M, Hao Y, Liu G, and Wen Y
- Subjects
- Bacterial Proteins genetics, Bacterial Proteins metabolism, Polyketide Synthases genetics, Polyketide Synthases metabolism, Metabolic Engineering, Acyl Coenzyme A metabolism, Acyl Coenzyme A genetics, Streptomyces genetics, Streptomyces metabolism, Streptomyces enzymology, Metabolic Networks and Pathways genetics, Ivermectin analogs & derivatives, Ivermectin metabolism
- Abstract
Avermectins (AVEs), a family of macrocyclic polyketides produced by Streptomyces avermitilis, have eight components, among which B1a is noted for its strong insecticidal activity. Biosynthesis of AVE "a" components requires 2-methylbutyryl-CoA (MBCoA) as starter unit, and malonyl-CoA (MalCoA) and methylmalonyl-CoA (MMCoA) as extender units. We describe here a novel strategy for increasing B1a production by enhancing acyl-CoA precursor supply. First, we engineered meilingmycin (MEI) polyketide synthase (PKS) for increasing MBCoA precursor supply. The loading module (using acetyl-CoA as substrate), extension module 7 (using MMCoA as substrate) and TE domain of MEI PKS were assembled to produce 2-methylbutyrate, providing the starter unit for B1a production. Heterologous expression of the newly designed PKS (termed Mei-PKS) in S. avermitilis wild-type (WT) strain increased MBCoA level, leading to B1a titer 262.2 μg/mL - 4.36-fold higher than WT value (48.9 μg/mL). Next, we separately inhibited three key nodes in essential pathways using CRISPRi to increase MalCoA and MMCoA levels in WT. The resulting strains all showed increased B1a titer. Combined inhibition of these key nodes in Mei-PKS expression strain increased B1a titer to 341.9 μg/mL. Overexpression of fatty acid β-oxidation pathway genes in the strain further increased B1a titer to 452.8 μg/mL - 8.25-fold higher than WT value. Finally, we applied our precursor supply strategies to high-yield industrial strain A229. The strategies, in combination, led to B1a titer 8836.4 μg/mL - 37.8% higher than parental A229 value. These findings provide an effective combination strategy for increasing AVE B1a production in WT and industrial S. avermitilis strains, and our precursor supply strategies can be readily adapted for overproduction of other polyketides., (© 2024 The Authors. Microbial Biotechnology published by John Wiley & Sons Ltd.)
- Published
- 2024
- Full Text
- View/download PDF
192. Risk assessment of ammonia bunkering operations: Perspectives on different release scales.
- Author
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Yang M and Lam JSL
- Abstract
Ammonia is an alternative marine fuel to reduce greenhouse gas emissions. Conducting studies on ammonia bunkering risk is essential as ammonia is toxic and corrosive to humans and the environment. This study aims to assess the ammonia bunkering operational risk from the perspectives of small, medium and large release scales. Scaling releases from small to medium results in more changes in cloud footprints at lower gas concentrations. Conversely, transitioning from medium to large releases causes more changes in cloud footprints at higher gas concentrations and lethality footprints with higher values. Moreover, this study performs a sensitivity analysis on ammonia bunkering supply, release, and meteorological factors. Wind speed is the most significant factor in small and medium releases, while hose diameter is the most significant factor in large releases. Under the given inputs, a 50% change in wind speed can have up to 100% change in the 1100 ppm maximum cloud footprint for small releases and a 663% change for medium releases. Similarly, a 50% change in hose diameter can result in a 1689% change in the 1100 ppm maximum cloud footprint for large releases. The research provides valuable insights into analysing ammonia bunkering operational risk considering different risk assessment criteria., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 The Authors. Published by Elsevier B.V. All rights reserved.)
- Published
- 2024
- Full Text
- View/download PDF
193. Aflibercept 5+PRN with retinal laser photocoagulation is more effective than retinal laser photocoagulation alone and aflibercept 3+PRN with retinal laser photocoagulation in patients with high-risk proliferative diabetic retinopathy and diabetic macular edema: a 12-month clinical trial.
- Author
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Li S, Tao Y, Yang M, Zhao H, Si M, Cui W, and Wang H
- Subjects
- Humans, Angiogenesis Inhibitors therapeutic use, Vascular Endothelial Growth Factor A, Retina, Laser Coagulation, Neovascularization, Pathologic drug therapy, Lasers, Diabetic Retinopathy drug therapy, Diabetic Retinopathy surgery, Macular Edema drug therapy, Macular Edema surgery, Diabetes Mellitus drug therapy, Recombinant Fusion Proteins, Receptors, Vascular Endothelial Growth Factor
- Abstract
Objective: This study aimed to investigate and compare the efficacy and safety of retinal laser photocoagulation (PRP) alone, PRP with aflibercept 3+PRN, and PRP with aflibercept 5+PRN in patients with both high-risk proliferative diabetic retinopathy (PDR) and diabetic macular edema (DME)., Methods: Overall, 170 patients with high-risk PDR and DME (170 eyes from 170 patients) who visited our ophthalmology clinic from December 2018 to December 2020 were divided into the PRP (n=58), aflibercept 5+PRN with PRP (n=53), and aflibercept 3+PRN with PRP (n= 59) groups. General information, such as age, sex, and eye category, was obtained. Moreover, best-corrected visual acuity (BCVA), baseline central macular foveal thickness (CFT), microaneurysm (MA), area of neovascularization (NV), area of hard exudate (HE), and cytokine levels in atrial fluid before and after treatment, were assessed. The χ
2 test was used for comparison between groups for statistical data. Analysis of variance was used for the statistical description of measurement data, independent samples were analyzed using Student's t -test, and Student-Newman-Keuls test was used for group comparisons. Differences were considered statistically significant at P < 0.05., Results: After treatment, no significant improvement in the BCVA (logMAR) of patients in the PRP group was observed. The BCVA (log MAR) decreased from 0.72 ± 0.17 and 0.74 ± 0.17 to 0.50 ± 0.13 and 0.53 ± 0.17 in PRP with aflibercept 5+PRN and PRP with aflibercept 3+PRN groups, respectively, with a statistically significant difference compared to those in the PRP group (P<0.05 in all cases). However, no statistically significant difference was observed between the combined treatment groups (P>0.05). The CFT in the PRP-only group decreased slightly from 361.80 ± 36.70 μm to 353.86 ± 40.88 μm, with no statistically significant difference (P>0.05), whereas the CFT in the aflibercept 5+PRN with PRP and aflibercept 3+PRN with PRP groups decreased from 356.57 ± 37.57 μm and 358.17 ± 44.66 μm to 284.87 ± 31.52 μm and 303.19 ± 37.00 μm, respectively, with statistically significant differences before and after treatment (P<0.05 for both groups). Statistically significant differences were observed in CFT between the three groups after treatment (P<0.05 in all cases). The number of MA (pcs) in the PRP, aflibercept 5+PRN with PRP, and aflibercept 3+PRN with PRP groups decreased from 118.34 ± 27.96, 118.60 ± 33.34, and 116.59 ± 28.95 to 92.95 ± 29.04, 44.60 ± 20.73, and 54.26 ± 25.43, respectively. The two-way comparison of the three groups revealed statistically significant differences in MA (P<0.05 in all cases). In the three groups, NV decreased from 1.00 ± 0.21 mm², 1.01 ± 0.18 mm², and 0.98 ± 0.20 mm² before treatment to 0.49 ± 0.17 mm², 0.31 ± 0.16 mm², and 0.38 ± 0.14 mm², respectively, with statistically significant differences (P<0.05 in all cases). After 12 months of treatment, 13, 18, and 18 patients had reduced HE area in the PRP-only, aflibercept 5+PRN with PRP, and aflibercept 3+PRN with PRP groups, respectively, with statistically significant differences (P<0.05 in all cases). After 12 months of treatment, vascular endothelial growth factor, monocyte chemoattractant protein-1, and glial fibrilliary acidic protein levels (pg/mL) in the aqueous humor decreased in both combined treatment groups compared with that at baseline, with statistically significant differences; however, no significant difference was observed between the two combined treatment groups (P>0.05)., Conclusion: Aflibercept 5+PRN combined with PRP was safe and effective in treating patients with high-risk PDR and DME, and was more effective than PRP-only and aflibercept 3+PRN with PRP in improving CFT and MA., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2024 Li, Tao, Yang, Zhao, Si, Cui and Wang.)- Published
- 2024
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194. Microbial community structure and co-occurrence network stability in seawater and microplastic biofilms under prometryn pollution in marine ecosystems.
- Author
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Yang M, Zhao L, Yu X, Shu W, Cao F, Liu Q, Liu M, Wang J, and Jiang Y
- Subjects
- Microplastics, Ecosystem, Plastics, Prometryne, Seawater chemistry, Biofilms, Microbiota, Water Pollutants, Chemical analysis
- Abstract
Prometryn has been extensively detected in marine environment because of its widespread usage in agriculture and aquaculture and has been concerns since its serious effects on aquatic organisms. However, its impact on the microbial community in the marine ecosystem including seawater and biofilm is still unclear. Therefore, a short-term indoor microcosm experiment of prometryn exposure was conducted. This study found that prometryn had a more significant impact on the structure and stability of the microbial community in seawater compared to microplastic biofilms. Additionally, we observed that the assembly of the microbial community in biofilms was more affected by stochastic processes than in seawater under the exposure of prometryn. Our study provided evidence for the increasing impact of the microbial communities under the stress of prometryn and microplastics., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023 Elsevier Ltd. All rights reserved.)
- Published
- 2024
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195. DNAzyme-Based Dissipative DNA Strand Displacement for Constructing Temporal Logic Gates.
- Author
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Hu M, Li X, Wu JN, Yang M, and Wu T
- Subjects
- DNA chemistry, Nanotechnology, Thermodynamics, DNA, Catalytic chemistry
- Abstract
Toehold-mediated DNA strand displacement is the foundation of dynamic DNA nanotechnology, encompassing a wide range of tools with diverse functions, dynamics, and thermodynamic properties. However, a majority of these tools are limited to unidirectional reactions driven by thermodynamics. In response to the growing field of dissipative DNA nanotechnology, we present an approach: DNAzyme-based dissipative DNA strand displacement (D-DSD), which combines the principles of dynamic DNA nanotechnology and dissipative DNA nanotechnology. D-DSD introduces circular and dissipative characteristics, distinguishing it from the unidirectional reactions observed in conventional strand displacement. We investigated the reaction mechanism of D-DSD and devised temporal control elements. By substituting temporal components, we designed two distinct temporal AND gates using fewer than 10 strands, eliminating the need for complex network designs. In contrast to previous temporal logic gates, our temporal storage is not through dynamics control or cross-inhibition but through autoregressive storage, a more modular and scalable approach to memory storage. D-DSD preserves the fundamental structure of toehold-mediated strand displacement, while offering enhanced simplicity and versatility.
- Published
- 2024
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196. Preparation of Ru-doped TiO 2 nanotube arrays through anodizing TiRu alloys for bifunctional HER/OER electrocatalysts.
- Author
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Liu Y, Wang X, Yang M, Li Y, Xiao Y, and Zhao J
- Abstract
In this research, Ru-doped TiO
2 nanotube arrays (Ru-TNTA) were prepared by anodizing TiRu alloys, and the effects of annealing temperature, Ru content and test temperature on their performances for the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) were investigated. The results show that the unannealed Ru-TNTA (a-Ru-TNTA) exhibits superior activity for the HER, and the Ru-TNTA annealed at 450 °C (c-Ru-TNTA) shows excellent activity for the OER. The Ru content of TiRu impacts the electrochemically active surface area (ECSA) and the charge transfer resistance ( Rct ) significantly. When the Ru content of Ru-TNTA is 6%, its performance is optimal. Moreover, the electrocatalytic activity of Ru-TNTA improves with increasing test temperature, and the overpotentials of a-Ru-TNTA and c-Ru-TNTA at 80 °C are 19 mV and 227 mV (10 mA cm-2 ), respectively. Ru-TNTA exhibits excellent electrocatalytic performance for water splitting and good stability, which provides a new idea for the preparation of advanced bifunctional electrocatalysts for water splitting.- Published
- 2023
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197. Prevalence and characteristics of accessory mandibular canals in an eastern Chinese population by cone beam computed tomography.
- Author
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Yang M, Yang J, and Deng S
- Abstract
Purpose: This retrospective study aimed to determine the prevalence and morphological characteristics of accessory mandibular canals (AMCs) in an eastern Chinese population to provide clinical guidance for reducing intraoperative and postoperative complications., Methods: Cone beam computed tomography (CBCT) scans of 300 Chinese patients were used to identify AMCs according to a modification of Naitoh's classification. The length of the branch (L0) and the upper and lower angles between the branch and mandibular canal were measured on sagittal images. Additionally, the branches were divided into narrow or wide types by calculating the ratio of the branch diameter to the main canal diameter. The location of the bifurcation point was characterized by measuring its distance to the buccal wall of the mandible (L1), lingual wall of the mandible (L2) and alveolar ridge (L3)., Results: The prevalence rate of AMCs was 40.7% (95% CI: 35.1-46.3), and the most common type was the retromolar canal, followed by the forward canal, dental canal, trifid mandibular canals (TMCs) or others, inferior canal and buccolingual canal. Twenty-one cases of multiple branches with unusual patterns were observed in the study. The average values of L0, L1, L2 and L3 were 15.05 ± 0.63 mm, 5.79 ± 0.14 mm, 4.40 ± 0.18 mm and 14.61 ± 0.31 mm, respectively. The mean upper angle and lower angle were 141.59° ± 2.44° and 50.64° ± 2.57°, respectively. Approximately 20.8% of the branches were defined as wide type, and no statistical significance was found between different types., Conclusion: AMCs are not rare anatomic variations of the mandibular canal in the eastern Chinese population; thus, CBCT examination is highly recommended for precise evaluation before surgeries involving the mandibles., (© 2023. The Author(s), under exclusive licence to Springer-Verlag France SAS, part of Springer Nature.)
- Published
- 2023
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198. Albumin-binding photosensitizer capable of targeting glioma via the SPARC pathway.
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Li X, Oh JS, Lee Y, Lee EC, Yang M, Kwon N, Ha TW, Hong DY, Song Y, Kim HK, Song BH, Choi S, Lee MR, and Yoon J
- Abstract
Background: Malignant glioma is among the most lethal and frequently occurring brain tumors, and the average survival period is 15 months. Existing chemotherapy has low tolerance and low blood-brain barrier (BBB) permeability; therefore, the required drug dose cannot be accurately delivered to the tumor site, resulting in an insufficient drug effect., Methods: Herein, we demonstrate a precision photodynamic tumor therapy using a photosensitizer (ZnPcS) capable of binding to albumin in situ, which can increase the permeability of the BBB and accurately target glioma. Albumin-binding ZnPcS was designed to pass through the BBB and bind to secreted protein acidic and rich in cysteine (SPARC), which is abundant in the glioma plasma membrane., Results: When the upper part of a mouse brain was irradiated using a laser (0.2 W cm
- 2 ) after transplantation of glioma and injection of ZnPcS, tumor growth was inhibited by approximately 83.6%, and the 50% survival rate of the treatment group increased by 14 days compared to the control group. In glioma with knockout SPARC, the amount of ZnPcS entering the glioma was reduced by 63.1%, indicating that it can target glioma through the SPARC pathway., Conclusion: This study showed that the use of albumin-binding photosensitizers is promising for the treatment of malignant gliomas., (© 2023. The Author(s).)- Published
- 2023
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199. ACTNet: asymmetric convolutional transformer network for diabetic foot ulcers classification.
- Author
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Ai L, Yang M, and Xie Z
- Subjects
- Humans, Electric Power Supplies, Records, Diabetic Foot diagnostic imaging, Diabetes Mellitus
- Abstract
Most existing image classification methods have achieved significant progress in the field of natural images. However, in the field of diabetic foot ulcer (DFU) where data is scarce and complex, the accurate classification of data is still a thorny problem. In this paper, we propose an Asymmetric Convolutional Transformer Network (ACTNet) for the multi-class (4-class) classification task of DFU. Specifically, in order to strengthen the expressive ability of the network, we design an asymmetric convolutional module in the front part of the network to model the relationship between local pixels, extract the underlying features of the image, and guide the network to focus on the central region in the image that contains more information. Furthermore, a novel pooling layer is added between the encoder and the classification head in the Transformer, which weights the data sequence generated by the encoder to better correlate the features between the input data. Finally, to fully exploit the performance of the model, we pretrained our model on ImageNet and fine-tune it on DFU images. The model is validated on the DFUC2021 test set, and the F1-score and AUC value are 0.593 and 0.824, respectively. The experiments show that our model has excellent performance even in the case of a small dataset., (© 2022. Australasian College of Physical Scientists and Engineers in Medicine.)
- Published
- 2022
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200. Reactivity Differences Enable ROS for Selective Ablation of Bacteria.
- Author
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Wu X, Yang M, Kim JS, Wang R, Kim G, Ha J, Kim H, Cho Y, Nam KT, and Yoon J
- Subjects
- Animals, Anti-Bacterial Agents pharmacology, Bacteria, Gram-Negative Bacteria, Mice, Photosensitizing Agents pharmacology, Reactive Oxygen Species, Gram-Positive Bacteria, Photochemotherapy methods
- Abstract
An effective strategy to engineer selective photodynamic agents to surmount bacterial-infected diseases, especially Gram-positive bacteria remains a great challenge. Herein, we developed two examples of compounds for a proof-of-concept study where reactive differences in reactive oxygen species (ROS) can induce selective ablation of Gram-positive bacteria. Sulfur-replaced phenoxazinium (NBS-N) mainly generates a superoxide anion radical capable of selectively killing Gram-positive bacteria, while selenium-substituted phenoxazinium (NBSe-N) has a higher generation of singlet oxygen that can kill both Gram-positive and Gram-negative bacteria. This difference was further evidenced by bacterial fluorescence imaging and morphological changes. Moreover, NBS-N can also successfully heal the Gram-positive bacteria-infected wounds in mice. We believe that such reactive differences may pave a general way to design selective photodynamic agents for ablating Gram-positive bacteria-infected diseases., (© 2022 Wiley-VCH GmbH.)
- Published
- 2022
- Full Text
- View/download PDF
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