37 results on '"Zhining Zhang"'
Search Results
2. HiOmics: A cloud-based one-stop platform for the comprehensive analysis of large-scale omics data
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Wen Li, Zhining Zhang, Bo Xie, Yunlin He, Kangming He, Hong Qiu, Zhiwei Lu, Chunlan Jiang, Xuanyu Pan, Yuxiao He, Wenyu Hu, Wenjian Liu, Tengcheng Que, and Yanling Hu
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Artificial intelligence modeling ,Cloud-based analysis ,HiOmics ,Large-scale omics data analysis ,Multi-omics integration analysis ,Biotechnology ,TP248.13-248.65 - Abstract
Analyzing the vast amount of omics data generated comprehensively by high-throughput sequencing technology is of utmost importance for scientists. In this context, we propose HiOmics, a cloud-based platform equipped with nearly 300 plugins designed for the comprehensive analysis and visualization of omics data. HiOmics utilizes the Element Plus framework to craft a user-friendly interface and harnesses Docker container technology to ensure the reliability and reproducibility of data analysis results. Furthermore, HiOmics employs the Workflow Description Language and Cromwell engine to construct workflows, ensuring the portability of data analysis and simplifying the examination of intricate data. Additionally, HiOmics has developed DataCheck, a tool based on Golang, which verifies and converts data formats. Finally, by leveraging the object storage technology and batch computing capabilities of public cloud platforms, HiOmics enables the storage and processing of large-scale data while maintaining resource independence among users.
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- 2024
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3. Comparison of meshing characteristics and dynamic behavior of hypoid gear drive under different load conditions
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Xiaole Wang, Yang Yang, Jianwei Lu, Xianguang Gu, Shaowu Qiu, Jianxue Liu, Zhining Zhang, and Baobao Dai
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Mechanical engineering and machinery ,TJ1-1570 - Abstract
The study of loaded meshing characteristics and dynamic behavior is significant for evaluating the stability of hypoid gear under actual working conditions. Loaded tooth contact analysis (LTCA) of a hypoid gear drive under different loads is carried out. The equivalent meshing force, loaded transmission error (LTE), comprehensive elastic deformation, and time-varying meshing stiffness (TVMS) are investigated. Results show that the LTE and TVMS are sensitive to load, and the LTE and TVMS curves show obvious asymmetric as the load increases. Under low load conditions, the actual contact ratio increases significantly with the increase of load, but tends to be flat when the load reaches a certain range. The obtained TVMS and LTE are fitted by higher Fourier series and introduced into an 8-DOF dynamic model. By comparing the time history diagram, phase diagram, Poincaré section, and spectrum, the dynamic characteristics of the system under different loads are contrasted. On low load condition, the system may exhibit chaotic motion in certain meshing frequency bands and damping ratio intervals. While the tooth backlash increases to a critical value, the system may change to chaotic motion from periodic motion. The results provided a basis for improving the meshing performance of hypoid gear.
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- 2024
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4. Interleukin-33 promotes intrauterine adhesion formation in mice through the mitogen-activated protein kinase signaling pathway
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Dan Liu, Liwei Yuan, Fengjuan Xu, Yulan Ma, Huixing Zhang, Yiran Jin, Meixia Chen, Zhining Zhang, and Sang Luo
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Biology (General) ,QH301-705.5 - Abstract
Abstract IL-33 belongs to the inflammatory factor family and is closely associated with the inflammatory response. However, its role in the development of intrauterine adhesions (IUAs) remains unclear. In this study, the role of IL-33 in the formation of IUAs after endometrial injury was identified via RNA sequencing after mouse endometrial organoids were transplanted into an IUA mouse model. Major pathological changes in the mouse uterus, consistent with the expression of fibrotic markers, such as TGF-β, were observed in response to treatment with IL-33. This finding may be attributed to activation of the phosphorylation of downstream MAPK signaling pathway components, which are activated by the release of IL-33 in macrophages. Our study provides a novel mechanism for elucidating IUA formation, suggesting a new therapeutic strategy for the prevention and clinical treatment of IUAs.
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- 2024
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5. Artificial Neurons Using Ag−In−Zn−S/Sericin Peptide‐Based Threshold Switching Memristors for Spiking Neural Networks
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Nan He, Jie Yan, Zhining Zhang, Haiming Qin, Ertao Hu, Xinpeng Wang, Hao Zhang, Pu Chen, Feng Xu, Yang Sheng, Lei Zhang, and Yi Tong
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Ag−In−Zn−S quantum dot ,memristors ,silk sericin ,spiking neurons ,threshold switching ,Electric apparatus and materials. Electric circuits. Electric networks ,TK452-454.4 ,Physics ,QC1-999 - Abstract
Abstract Memristive devices with threshold switching characteristics can be effectively utilized to mimic biological neurons acting as one of the key building blocks for constructing advanced hardware neural networks. In this work, the emulation of leaky integrate‐and‐fire memristive neuron is realized in one single cell with Ag/Ag−In−Zn−S/silk sericin/W architecture without the need for additional auxiliary circuits. The studied devices demonstrate excellent electrical properties, such as stably repeatable threshold switching, concentratedly low threshold voltage (≈0.4 V), and relatively small device‐to‐device variation. In addition, multiple neural features, such as leaky integrate‐and‐fire neuron functionality and strength‐modulated spike frequency characteristic, have been successfully emulated owing to the forming‐free volatile threshold switching effect. The stable volatile threshold switching behaviors and regular firing event may be attributed to the controllable metallic Ag filamentary mechanism. Furthermore, a solid accuracy of 91.44% of the pattern recognition of Modified National Institute of Standards and Technology (MNIST) data is obtained via a trained spiking neural network (SNN) based on the leaky integrate‐and‐fire behavior of sericin‐based device. These achievements shed light on the fact that employing sericin biomaterials has great application potential in advanced neuromorphic computation.
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- 2023
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6. Altitude-dependent gaseous emissions from freight trucks along the China-Pakistan Economic Corridor in Pakistan
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Asad Ali Shaikh, Tingkun He, Fanyuan Deng, Zhenyu Luo, Junchao Zhao, Zhining Zhang, and Huan Liu
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Truck emissions ,High altitude ,China-Pakistan Economic corridor ,Emission factors ,Environmental sciences ,GE1-350 ,Environmental technology. Sanitary engineering ,TD1-1066 - Abstract
Recent increases in emissions from freight transport have caused strong concerns about air quality in Pakistan, following the rapid development of projects related to the China-Pakistan Economic Corridor (CPEC). This study reported the first measurements of on-road truck emissions in Pakistan and investigated their dependence on altitude along CPEC routes. Emissions from 70 trucks were measured on CPEC highways located in Islamabad (540 m above sea level), Sost (2800 m above sea level), and at the Khunjerab Pass (4693 m above sea level). Calculated emission factors for carbon monoxide, hydrocarbons, and nitrogen oxides from heavy-duty trucks in Islamabad were 12.94 ± 1.46, 15.21 ± 1.67, and 10.69 ± 1.34 g km−1 (95% confidence level), respectively, for pre-Pak-II trucks, and 12.75 ± 2.80, 14.24 ± 3.53, and 10.24 ± 2.34 g km−1 (95% confidence level), respectively, for Pak-II trucks, representing 2–20 times higher values than the emission standards in Pakistan and India. An altitude increase of approximately 4000 m, with the associated changes in meteorology and fleet characteristics, induced an average increase of 103.6%, 86.3%, 124.5%, and 133.6% in the emission factors of carbon monoxide, hydrocarbons, nitrogen oxides, and carbon dioxide, respectively. Moreover, on-road emissions along the CPEC were mainly influenced by truck types. This study will support the budget evaluation of transport emissions from the CPEC trade fleet.
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- 2023
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7. Investigating students’ attitudes towards translation technology: The status quo and structural relations with translation mindsets and future work self
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Sha Tian, Lingxiao Jia, and Zhining Zhang
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translation technology teaching ,attitudes towards translation technology ,translation mindsets ,future work self ,structural relations ,Psychology ,BF1-990 - Abstract
IntroductionDespite the growing attention paid to the research of translation technology teaching (TTT), there is still a lack of studies on students’ attitudes and the motivational factors in relation to it. To this end, the paper reports on a questionnaire-based study that describes students’ attitudes towards translation technology (in the Chinese MTI context) and explores its structural relations with translation mindsets and future work self.MethodsData were collected from 108 grade 2021 MTI students of three selected Chinese universities and analyzed using descriptive statistics and structural equation modeling (SEM).ResultsThe results demonstrate that Chinese MTI students’ overall attitudes towards translation technology are slightly positive. So far, they perceive translation technology to be slightly effective for translation and are slightly mindful of it. They are slightly influenced by teachers and still feel inhibited when learning and using it. Furthermore, the results also indicate that growth translation mindsets positively influence students’ attitudes towards the effectiveness of translation technology, teacher influence, exhibition to translation technology, and mindfulness about translation technology, whereas fixed translation mindsets only negatively predict students’ teacher influence. Likewise, future work self-salience positively associates with students’ attitudes towards the effectiveness of translation technology and mindfulness about translation technology, while future work self-elaboration positively relates to students’ exhibition to translation technology. Among them, growth translation mindsets are the strongest predictor for all attitudes components.DiscussionTheoretical and pedagogical implications are also discussed.
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- 2023
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8. Career adaptability of interpreting students: A case study of its development and interactions with interpreter competences in three Chinese universities
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Sha Tian, Zhining Zhang, and Lingxiao Jia
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career adaptability ,interpreting students ,interpreter competences ,curriculum modification ,MTI program ,Psychology ,BF1-990 - Abstract
The issue of employability has already become a well-delineated topic of study among interpreting educators. However, the current literature still lacks descriptive research on interpreting students' employability development and ignores the developmental effects of interpreter competences in this process. Moreover, the advantage of using career adaptability for measurement is also under-researched. This exploratory case study aims at taking an initial step forward, surveying interpreting students' career adaptability development and the developmental effects of different interpreter competences on major adaptability resources, and ultimately diagnosing curriculum problems and making modifications accordingly. Thirty grade 2019 interpreting students from three Chinese universities contributed to data collection, through six questionnaires in a two-wave survey. The results highlight that, throughout the Chinese MTI program, interpreting students could become more concerned and well prepared for their future (concern), more curious to explore themselves and their surroundings (curiosity), and more capable of solving problems (confidence). The results also indicate that students' knowledge and language competence serve as the major facilitators in this process, and that other interpreter competences, such as psychological competence, transfer competence, professionalism, and cross-cultural competence, are also instrumental. In order to further boost their adaptability constructs, the results suggest that students' language and knowledge competence, professionalism, and cross-cultural and mental agility still need to be improved. Five suggestions for curriculum revision have been raised accordingly. As an initial effort, the current study will hopefully inspire further studies on interpreting students' career adaptability and add more knowledge to the curriculum design from this viewpoint.
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- 2022
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9. MFEAFN: Multi-scale feature enhanced adaptive fusion network for image semantic segmentation.
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Shusheng Li, Liang Wan, Lu Tang, and Zhining Zhang
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Medicine ,Science - Abstract
Low-level features contain spatial detail information, and high-level features contain rich semantic information. Semantic segmentation research focuses on fully acquiring and effectively fusing spatial detail with semantic information. This paper proposes a multiscale feature-enhanced adaptive fusion network named MFEAFN to improve semantic segmentation performance. First, we designed a Double Spatial Pyramid Module named DSPM to extract more high-level semantic information. Second, we designed a Focusing Selective Fusion Module named FSFM to fuse different scales and levels of feature maps. Specifically, the feature maps are enhanced to adaptively fuse these features by generating attention weights through a spatial attention mechanism and a two-dimensional discrete cosine transform, respectively. To validate the effectiveness of FSFM, we designed different fusion modules for comparison and ablation experiments. MFEAFN achieved 82.64% and 78.46% mIoU on the PASCAL VOC2012 and Cityscapes datasets. In addition, our method has better segmentation results than state-of-the-art methods.
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- 2022
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10. JACLNet:Application of adaptive code length network in JavaScript malicious code detection.
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Zhining Zhang, Liang Wan, Kun Chu, Shusheng Li, Haodong Wei, and Lu Tang
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Medicine ,Science - Abstract
Currently, JavaScript malicious code detection methods are becoming more and more effective. Still, the existing methods based on deep learning are poor at detecting too long or too short JavaScript code. Based on this, this paper proposes an adaptive code length deep learning network JACLNet, composed of convolutional block RDCNet, BiLSTM and Transfrom, to capture the association features of the variable distance between codes. Firstly, an abstract syntax tree recombination algorithm is designed to provide rich syntax information for feature extraction. Secondly, a deep residual convolution block network (RDCNet) is designed to capture short-distance association features between codes. Finally, this paper proposes a JACLNet network for JavaScript malicious code detection. To verify that the model presented in this paper can effectively detect variable JavaScript code, we divide the datasets used in this paper into long text dataset DB_Long; short text dataset DB_Short, original dataset DB_Or and enhanced dataset DB_Re. In DB_Long, our method's F1 - score is 98.87%, higher than that of JSContana by 2.52%. In DB_Short, our method's F1-score is 97.32%, higher than that of JSContana by 7.79%. To verify that the abstract syntax tree recombination algorithm proposed in this paper can provide rich syntax information for subsequent models, we conduct comparative experiments on DB_Or and DB_Re. In DPCNN+BiLSTM, F1-score with abstract syntax tree recombination increased by 1.72%, and in JSContana, F1-score with abstract syntax tree recombination increased by 1.50%. F1-score with abstract syntax tree recombination in JACNet improved by 1.00% otherwise unused.
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- 2022
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11. Polydatin Inhibits Cell Viability, Migration, and Invasion Through Suppressing the c-Myc Expression in Human Cervical Cancer
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Longchang Bai, Yingkang Ma, Xue Wang, Qiongni Feng, Zhining Zhang, Sijie Wang, Huijie Zhang, Xinyu Lu, Yonghui Xu, Erhu Zhao, and Hongjuan Cui
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polydatin ,cervical cancer ,c-Myc ,cell viability ,migration and invasion ,Biology (General) ,QH301-705.5 - Abstract
Polydatin, an active ingredient from the roots of Polygonum cuspidatum, is considered to have protective effects on the cardiovascular system and liver. In this study, we demonstrated that polydatin has antitumor activity against human cervical cancer. Polydatin efficiently inhibited cervical cancer cell proliferation by regulating cell cycle-related proteins including p21, p27, CDK2, CDK4, Cyclin D1, and Cyclin E1. Furthermore, polydatin suppressed cell invasion and migration by regulating epithelial–mesenchymal transition (EMT) markers, including E-cadherin, N-cadherin, Snail and Slug. The c-Myc, as a proto-oncogene, is considered to be closely associated with the proliferation and metastasis of tumor cells. After polydatin treatment, the protein expression of c-Myc showed a significant decrease. Based on these data, we overexpressed c-Myc in cervical cancer cells and observed that the overexpression of c-Myc rescued the inhibitory effect of polydatin on cell proliferation and metastasis. These results indicated that polydatin can inhibit cell proliferation and metastasis through suppressing the c-Myc expression in human cervical cancer.
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- 2021
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12. Evaluation of the VOC pollution pattern and emission characteristics during the Beijing resurgence of COVID-19 in summer 2020 based on the measurement of PTR-ToF-MS
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Zhining Zhang, Hanyang Man, Fengkui Duan, Zhaofeng Lv, Songxin Zheng, Junchao Zhao, Feifan Huang, Zhenyu Luo, Kebin He, and Huan Liu
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VOC ,Beijing resurgence ,COVID-19 ,PTR-ToF-MS ,source apportionment ,Environmental technology. Sanitary engineering ,TD1-1066 ,Environmental sciences ,GE1-350 ,Science ,Physics ,QC1-999 - Abstract
A second wave of coronavirus disease 2019 (COVID-19) infections emerged in Beijing in summer 2020, which provided an opportunity to explore the response of air pollution to reduced human activity. Proton-transfer reaction time-of-flight mass spectrometry (PTR-ToF-MS) coupled with positive matrix factorization (PMF) source apportionment were applied to evaluate the pollution pattern and capture the detailed dynamic emission characteristics of volatile organic compounds (VOCs) during the representative period, with the occurrence of O _3 pollution episodes and the Beijing resurgence of COVID-19. The level of anthropogenic VOC was lower than during the same period in previous years due to the pandemic and emission reduction measures. More than two thirds of the days during the observation period were identified as high-O _3 days and VOCs exhibited higher mixing ratios and faster consumption rates in the daytime on high-O _3 days. The identified VOC emission sources and the corresponding contributions during the whole observation period included: vehicle + fuel (12.41 ± 9.43%), industrial process (9.40 ± 8.65%), solvent usage (19.58 ± 13.46%), biogenic (6.03 ± 5.40%), background + long-lived (5.62 ± 11.37%), and two groups of oxygenated VOC (OVOC) factors (primary emission and secondary formation, 26.14 ± 15.20% and 20.84 ± 14.0%, respectively). Refined dynamic source apportionment results show that the ‘stay at home’ tendency led to decreased emission (−34.47 ± 1.90%) and a weakened morning peak of vehicle + fuel during the Beijing resurgence. However, a growing emission of primary OVOCs (+51.10 ± 8.28%) with similar diurnal variation was observed in the new outbreak and afterwards, which might be related to the enhanced usage of products intended to clean and disinfect. The present study illustrated that more stringent VOC reduction measures towards pandemic products should be carried out to achieve the balanced emission abatement of NO _x and VOC when adhering to regular epidemic prevention and control measures.
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- 2022
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13. Language Models Represent Beliefs of Self and Others.
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Wentao Zhu 0004, Zhining Zhang, and Yizhou Wang 0001
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- 2024
14. The Impact of Trade Policies on Promoting Growth in Developing Countries
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Wanlin Jiang and Zhining Zhang
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This study analyzes the successfulness of four categories of policies, which are tariff reduction, infrastructure development, business investment, and educational advancement in the growth of developing countries, shown by GDP and employment as the indicators. By predicting the impact of the tariff reduction model on trade and analyzing the theory of the implication of import and export volumes on economic growth, it is concluded that there is no direct correlation between tariff reductions and GDP growth. Data suggest that the present relationship between educational development and economic growth is negative, but the literature also studies that the results of GDP growth need to be shown in the long term, and it is difficult to derive long-term effects from the example chosen in the study. As for the second indicator of growth, which is employment, the overall impact of tariff reduction and education enhancement policies tend to be positive, even though the literature suggests conflicting views on the causal relationship between all four policies and employment. While empirical results show that the stimulation of infrastructure investment and business investment shows a significant positive correlation with GDP growth in each country.
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- 2022
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15. Ambient air quality baseline and standard formulation methods and their enlightenment for China
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Yongyue Wang, Zhining Zhang, Zhenyu Luo, Tingkun He, Huan Liu, Lei Duan, Keding Lu, Cheng Liu, Xiaoqian Li, Fengchang Wu, Yuanhang Zhang, Wenqing Liu, and Kebin He
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Multidisciplinary - Published
- 2022
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16. Variation of Particles in the Exhaust Plume of Gasoline Direct Injection Vehicles Based on a Multipoint Sampling System: Concentrations, Components, and Numbers
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Zhining Zhang, Lidong Liu, Yongliang Ma, Junchao Zhao, Fanyuan Deng, Kebin He, and Huan Liu
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General Medicine - Published
- 2022
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17. Shaped by Time Orientation: Managerial Myopia and Corporate Social Responsibility
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Fuwei Jiang, zhining zhang, and Ding Hui
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- 2023
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18. The Computing Chips in Unmanned Systems from Electron to Photon
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Baoqin Ding, Li Pei, Bing Bai, Jianshuai Wang, Chang Liu, and Zhining Zhang
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- 2023
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19. Empirical Study of the Connection of Media Attention and Bank's Operating Risk in United States
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Yao Tan and Zhining Zhang
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- 2022
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20. Neuromodulation therapies and potential treatments for traumatic brain injury
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zhining zhang
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- 2022
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21. Comprehensive Assessment for the Impacts of S/IVOC Emissions from Mobile Sources on SOA Formation in China
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Junchao Zhao, Zhaofeng Lv, Lijuan Qi, Bin Zhao, Fanyuan Deng, Xing Chang, Xiaotong Wang, Zhenyu Luo, Zhining Zhang, Hailian Xu, Qi Ying, Shuxiao Wang, Kebin He, and Huan Liu
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Aerosols ,China ,Volatile Organic Compounds ,Air Pollutants ,Environmental Chemistry ,General Chemistry ,Seasons ,Vehicle Emissions - Abstract
Semivolatile/intermediate-volatility organic compounds (S/IVOCs) from mobile sources are essential SOA contributors. However, few studies have comprehensively evaluated the SOA contributions of S/IVOCs by simultaneously comparing different parameterization schemes. This study used three SOA schemes in the CMAQ model with a measurement-based emission inventory to quantify the mobile source S/IVOC-induced SOA (MS-SI-SOA) for 2018 in China. Among different SOA schemes, SOA predicted by the 2D-VBS scheme was in the best agreement with observations, but there were still large deviations in a few regions. Three SOA schemes showed the peak value of annual average MS-SI-SOA was up to 0.6 ± 0.3 μg/m
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- 2022
22. AEDN: Encoder-Decoder Network with Attention for Semantic Image Segmentation
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Shusheng Li, Liang Wan, Lu Tang, and Zhining Zhang
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Enhancing receptive fields using atrous convolution in the domain of semantic segmentation has been proven to be an effective method. However, atrous convolution exists ”grid effect” and does not capture long-range dependencies well, causing problems such as loss of information details and class confusion. To address the above problems, based on two proposed modules: Strip Spatial Attention Module (SSAM) and Adaptive Fusion Module (AFM), we designed a network with an encoder-decoder structure named AEDN. Specifically, we introduced horizontal and vertical strip modules to design a Strip Spatial Attention Module, which did not require association for each pixel, avoided useless coding information, and could capture long-distance dependencies. AFM can perform an adaptive fusion of high-level and low-level features without dimensionality reduction, which helps to recover spatial information of images gradually. The effectiveness of AEDN has been verified experimentally on the PASCAL VOC 2012 and Cityscapes datasets. Specifically , our network achieves 80.21% and 77.47% mIoU on the PASCAL VOC 2012 and Cityscape validation sets, respectively, and can better handle issues such as loss of information details and class confusion.
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- 2022
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23. Updating emission inventories for vehicular organic gases: Indications from cold-start and temperature effects on advanced technology cars
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Zhining Zhang, Junchao Zhao, Hanyang Man, Lijuan Qi, Hang Yin, Zhaofeng Lv, Yuheng Jiang, Junjie Dong, Meng Zeng, Zhitao Cai, Zhenyu Luo, Kebin He, and Huan Liu
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Environmental Engineering ,Environmental Chemistry ,Pollution ,Waste Management and Disposal - Published
- 2023
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24. Fractionation of perfluoroalkyl acids (PFAAs) along the aquatic food chain promoted by competitive effects between longer and shorter chain PFAAs
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Wu Wen, Lu Xiao, Diexuan Hu, Zhining Zhang, Yilin Xiao, Xiaoman Jiang, Shangwei Zhang, and Xinghui Xia
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Environmental Engineering ,Health, Toxicology and Mutagenesis ,Public Health, Environmental and Occupational Health ,Environmental Chemistry ,General Medicine ,General Chemistry ,Pollution - Published
- 2023
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25. An updated comprehensive IVOC emission inventory for mobile sources in China
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Junchao, Zhao, Lijuan, Qi, Zhaofeng, Lv, Xiaotong, Wang, Fanyuan, Deng, Zhining, Zhang, Zhenyu, Luo, Pengju, Bie, Kebin, He, and Huan, Liu
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Aerosols ,Volatile Organic Compounds ,Motor Vehicles ,China ,Air Pollutants ,Environmental Engineering ,Environmental Chemistry ,Pollution ,Waste Management and Disposal ,Hydrocarbons ,Vehicle Emissions - Abstract
Intermediate volatility organic compounds (IVOCs) from mobile sources contribute significantly to secondary organic aerosol (SOA) formation. However, the assessments of IVOC emissions remain considerably uncertain due to the lack of localized measured data and detailed emission source classifications. This study established a comprehensive database of IVOC emission factors (EFs) for mobile sources based on the diversified measured EFs and correlations with hydrocarbons. The provincial-level IVOC emission inventories over China were further established by integrating activity data of various mobile sources. The national mobile source IVOC emissions were 507.5 Gg in 2017. The IVOC emissions of on-road and non-road mobile sources were roughly the same. Trucks and non-road construction machineries were the major contributors to IVOC emissions, accounting for66 % of the total. The IVOC emission characteristics and spatial distributions from various mobile sources varied significantly with different types and usages. The IVOC emission inventories with detailed classifications can be used to evaluate emission control policies for mobile sources. Incorporating localized measured data would be beneficial for a better understanding for the atmospheric impacts of mobile source IVOC emissions.
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- 2022
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26. An Isolated Bidirectional DC-DC Converter with High Voltage Conversion Ratio and Reduced Output Current Ripple
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Zhining Zhang, Boxue Hu, Yue Zhang, Jin Wang, Jacob Mueller, Luciano A. Garcia Rodriguez, Anindya Ray, and Stanley Atcitty
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- 2021
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27. Development of a 1 kV, 500 A, SiC-Based T-Type Modular DC Circuit Breaker (T-Breaker)
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Yue Zhang, Xiao Li, Dihao Ma, Yizhou Cong, Faisal Alsaif, Zhining Zhang, Rob Borjas, Boxue Hu, Jin Wang, Baljit Riar, Jeffery Ewanchuk, Aritra Sur, and Vladmir Blasko
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- 2021
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28. High Gain DC-DC Converter Collaborative: The Ohio State University Design
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Zhining Zhang, Boxue Hu, Yue Zhang, Jin Wang, Jacob Mueller, Luciano Garcia Rodriguez, Anindya Ray, and Stanley Atcitty
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- 2021
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29. Molecular characterization of atmospheric particulate organosulfates in a port environment using ultrahigh resolution mass spectrometry: Identification of traffic emissions
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Zhining Zhang, Lijuan Qi, Huan Liu, Xiaotong Wang, Junchao Zhao, and Fanyuan Deng
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Pollution ,Environmental Engineering ,Health, Toxicology and Mutagenesis ,media_common.quotation_subject ,0211 other engineering and technologies ,02 engineering and technology ,010501 environmental sciences ,Mass spectrometry ,01 natural sciences ,Mass Spectrometry ,Environmental Chemistry ,Waste Management and Disposal ,0105 earth and related environmental sciences ,media_common ,Aerosols ,021110 strategic, defence & security studies ,Volatile Organic Compounds ,Dust ,Particulates ,Characterization (materials science) ,Aerosol ,Ultrahigh resolution ,Environmental chemistry ,Haze pollution ,Environmental science - Abstract
Organosulfates (OSs) are an important component of atmospheric organic aerosol (OA) and are widespread in various environments. However, the OSs generated from anthropogenic emissions are poorly understood. In this study, the molecular compositions of OSs from atmospheric PM2.5 samples collected during a winter measurement campaign (SEISO-Bohai) at Jingtang Harbor were characterized via ultrahigh resolution mass spectrometry (UHRMS). The changes of port OS compositions were observed in episodes of complete haze pollution. As the pollution aggravated, the relative abundances of OSs were apparently increased, and the molecule compositions became more complex, primarily driven by the oxidation and fragmentation processes. Potential OS precursors from traffic emissions were identified based on an optimized "OS precursor map" developed in the previous study. OSs characterized by high molecular weights and low degrees of both unsaturation and oxidization were suggested to mainly derive from secondary reactions of intermediate volatile organic compounds (IVOCs) emitted by traffic sources. These OSs were primarily detected in clean-day samples, followed by decreasing with the pollution process. In addition, our study also finds that ship emissions may further facilitated OS productions under haze pollution conditions.
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- 2021
30. Primary organic gas emissions in vehicle cold start events: Rates, compositions and temperature effects
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Zhining, Zhang, Hanyang, Man, Junchao, Zhao, Yuheng, Jiang, Meng, Zeng, Zhitao, Cai, Cheng, Huang, Wendong, Huang, Haiguang, Zhao, Shengao, Jing, Xu, Shi, Kebin, He, and Huan, Liu
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Air Pollutants ,Motor Vehicles ,Volatile Organic Compounds ,Environmental Engineering ,Health, Toxicology and Mutagenesis ,Temperature ,Humans ,Environmental Chemistry ,Pollution ,Waste Management and Disposal ,Gasoline ,Environmental Monitoring ,Vehicle Emissions - Abstract
Identification of air toxics emitted from light-duty gasoline vehicles (LDGVs) is expected to better protect human health. Here, the volatile organic compound (VOC) and intermediate VOC (IVOC) emissions in the high-emitted start stages were measured on a chassis dynamometer under normal and extreme temperatures for China 6 LDGVs. Low temperature enhanced the emission rates (ERs) of both VOCs and IVOCs. The VOC ERs were averaged 5.19 ± 2.74 times higher when the temperature dropped from 23 °C to 0 °C, and IVOCs were less sensitive to temperature change with an enlargement of 2.27 ± 0.19 times. Aromatics (46.75 ± 2.83%) and alkanes (18.46 ± 1.21%) dominated the cold start VOC emissions under normal temperature, which was quite different from hot running emission profiles. From the perspective of emission inventories, changes in the speciated composition of VOCs and IVOCs were less important than that in the actual magnitude of ERs under cold conditions. However, changes in the ERs and emission profiles were equally important at high temperatures. Furthermore, high time-resolved measurements revealed that low temperature enhanced both the emission peak and peak duration of fuel components and incomplete combustion products during cold start, while high temperature only increased the peak concentration of fuel components.
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- 2022
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31. Current Sharing Analysis of SiC Power Modules in Parallel Operation
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Khalid Alkhalid, Yue Zhang, Boxue Hu, Zhining Zhang, Xiao Li, Jin Wang, and Faisal Alsaif
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Materials science ,Steady state (electronics) ,business.industry ,05 social sciences ,Electrical engineering ,020207 software engineering ,02 engineering and technology ,Input impedance ,Inductance ,Power module ,0202 electrical engineering, electronic engineering, information engineering ,Gate driver ,0501 psychology and cognitive sciences ,Power semiconductor device ,business ,Electrical impedance ,050107 human factors ,Electronic circuit - Abstract
This paper seeks to study the contributing factors to current mismatch among parallelled SiC power modules, including the gate driver circuits, and the impedance of the bus barsm, the load connection and the load impedance. Compared with using silicon power devices, the effect of impedance asymmetry and inductive coupling is more pronounced with SiC power modules due to significantly lower on-resistance, lower load inductance and higher steady state di/dt. It is also revealed that nanosecond-level mismatch in the gate driver circuits can lead to significant dynamic current mismatch. Hardware tests and detailed simulations are carried out to explore these effects, and finally achieving 2.41% mismatch in dynamic switching energy and minimal mismatch in the steady state current sharing.
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- 2020
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32. Impacts of vehicle emission on air quality and human health in China
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Zhenyu, Luo, Yue, Wang, Zhaofeng, Lv, Tingkun, He, Junchao, Zhao, Yongyue, Wang, Fei, Gao, Zhining, Zhang, and Huan, Liu
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Air Pollutants ,China ,Ozone ,Environmental Engineering ,Air Pollution ,Humans ,Environmental Chemistry ,Particulate Matter ,Pollution ,Waste Management and Disposal ,Environmental Monitoring ,Vehicle Emissions - Abstract
The growing of vehicle population aggravates air pollution and threatens human health. In this study, based on the refined whole-process vehicle emission inventory considering volatile organic compounds (VOCs) evaporation emission, the CAMx model was applied to comprehensively quantify the impacts of the vehicle sector on the annual and seasonal concentrations of PM
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- 2022
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33. Variations in concentrations and bioavailability of heavy metals in rivers caused by water conservancy projects: Insights from water regulation of the Xiaolangdi Reservoir in the Yellow River
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Zixuan Liu, Xinghui Xia, Husheng Li, Zhining Zhang, Jianwei Dong, and Xiaotian Zhang
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China ,Geologic Sediments ,Environmental Engineering ,010504 meteorology & atmospheric sciences ,media_common.quotation_subject ,Daphnia magna ,010501 environmental sciences ,01 natural sciences ,Metal ,Rivers ,Metals, Heavy ,Environmental Chemistry ,0105 earth and related environmental sciences ,General Environmental Science ,media_common ,biology ,fungi ,Water ,Sediment ,Heavy metals ,General Medicine ,biology.organism_classification ,Bioavailability ,Speciation ,visual_art ,Environmental chemistry ,Bioaccumulation ,visual_art.visual_art_medium ,Environmental science ,Hydrology ,Water regulation ,Water Pollutants, Chemical ,Environmental Monitoring - Abstract
Water regulation of the Xiaolangdi Reservoir of the Yellow River was chosen as a case to investigate variations in concentrations and bioavailability of heavy metals caused by water conservancy projects in rivers. Water and suspended sediment (SPS) samples were collected at downstream sampling sites along the river during this period. Concentrations and speciation of Zn, Cr, Cu, Ni, and Pb in water and SPS samples were analyzed, and their bioaccumulation was studied with Daphnia magna. This study indicated that the exchangeable and carbonate-bound fractions of heavy metals in SPS decreased along the studied stretch, and the dissolved heavy metal concentrations increased along the river with 1.6–15 folds. This is because sediment resuspension increased along the river during water regulation, giving rise to the increase of heavy metal release from SPS. The dissolved Zn, Cu, Ni, and Pb concentrations were significantly positively correlated with SPS concentrations, and their increase along the river was greater than Cr. The body burdens of heavy metals in D. magna exposed into samples collected from the reservoir outlet were 1.3–3.0 times lower than those from downstream stations, suggesting that the heavy metal bioavailability increased during water regulation. This should be considered in the reservoir operation.
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- 2018
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34. Measurement and minutely-resolved source apportionment of ambient VOCs in a corridor city during 2019 China International Import Expo episode
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Hanyang Man, Shengao Jing, Huan Liu, Xiaotong Wang, Shuxiao Wang, Hongli Wang, Kebin He, Lijuan Qi, Junchao Zhao, Tao He, and Zhining Zhang
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Delta ,Air Pollutants ,China ,Volatile Organic Compounds ,Environmental Engineering ,Improved method ,Atmospheric sciences ,Pollution ,Ptr tof ms ,Ozone ,Yangtze river ,Environmental Chemistry ,Environmental science ,Photochemical reactivity ,Waste Management and Disposal ,Air quality index ,Environmental Monitoring - Abstract
In this study, real-time measurement of Volatile Organic Compounds (VOCs) was conducted at an urban site in Changzhou, a typical corridor city in the Yangtze River Delta (YRD) region in China, by Proton−Transfer−Reaction Time−of−Flight Mass Spectrometry (PTR−ToF−MS) during 2019 China International Import Expo (CIIE) episode. An improved method based on Air Quality Index (AQI) value is applied to identify polluted and clean periods. Diurnal pattern of VOC levels revealed elevated photochemical reactivity during polluted periods. Five VOC sources were identified by Positive Matrix Factorization (PMF) model, including secondary formation (22.71 ± 12.33%), biogenic (21.50% ± 11.76%), solvent usage (20.50 ± 10.07%), vehicle exhaust (18.32 ± 8.32%), and industrial process and fuel usage (16.96 ± 13.21%). The mean contribution of vehicular exhaust was 10.84% higher during the nighttime than the daytime under polluted days. The biogenic source contributed more during clean periods, while the secondary formation presented the opposite. Spatial analysis displayed that the VOC concentration was higher in the S and SSE. In terms of the regional transport, short-distance air masses from the northeast and the south within the YRD region led to high VOC levels and biogenic VOC derived from the ocean might affect the entire region. Stringent emission control policies enforced over the YRD for 2019 CIIE provided an excellent opportunity to determine the source-receptor response. As joint control area, the VOC level of Changzhou exhibited a substantial reduction and the VOC amounts emitted by solvent usage showed the biggest decrease (−58%). The findings of this study highlight the superiority of high time-resolved data in identifying the dynamic variation pattern (with the change of time and wind) of VOC levels and emission intensities.
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- 2021
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35. Molecular implication of ADAM-15 and -17 in intrauterine adhesions
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Zhining Zhang, Xueyu Zhang, Chunfang Ha, Dan Liu, and Peishu Liu
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Adult ,medicine.medical_specialty ,Transcription, Genetic ,Tissue Adhesions ,Transcript level ,ADAM17 Protein ,Endometrium ,Western blot ,Medicine ,Humans ,In patient ,Volunteer ,Gynecology ,Uterine Diseases ,medicine.diagnostic_test ,business.industry ,Case-control study ,Obstetrics and Gynecology ,Protein level ,Membrane Proteins ,carbohydrates (lipids) ,ADAM Proteins ,medicine.anatomical_structure ,Reproductive Medicine ,Case-Control Studies ,Disease Progression ,Immunohistochemistry ,Female ,business ,Biomarkers - Abstract
To investigate the regulation of the proteins ADAM-15 and ADAM-17 in intrauterine adhesions (IUA).68 patients were found to have IUA in a study performed at our Department of Gynecology, and 18 control volunteer participants were recruited in the study. The patients with IUA were assigned to three groups according to the classification of March et al.: IUA-I (n=28), IUA-II (n=22), and IUA-III (n=18). All the volunteers were assigned to the control group (Con, n=18). The expression of ADAM-15 and ADAM-17 in the adhesive band tissue in patients and the endometrium in volunteers was detected by western blot, real-time PCR, and immunohistochemistry.The expression of ADAM-15 and ADAM-17 was significantly upregulated in both protein level and transcript level in IUA patients compared to that in controls. ADAM-15 expression was significantly higher in IUA-III (4.59±0.15) compared to IUA-II (3.18±0.12) and IUA-I (2.11±0.17; P0.01). ADAM-17 expression was also significantly higher in IUA-III (3.25±0.11) compared to IUA-II (2.21±0.15) and IUA-I (1.78±0.21; P0.01). The transcript levels of ADAM-15 and ADAM-17 showed similar patterns, and were markedly higher in grade III IUA patients compared to grade II and grade I. The severity of IUA was positively correlated to the protein and transcript expression level of ADAM-15 and ADAM-17 in uterine tissue.The development of IUA is associated with regulation of ADAM15 and ADAM-17, which may be potential biological markers for evaluating the severity of intrauterine adhesions.
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- 2012
36. Naked-eye sensitive detection of nuclease activity using positively-charged gold nanoparticles as colorimetric probes
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Yuanfu Zhang, Zhining Zhang, Rui Cao, and Baoxin Li
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Nuclease ,Deoxyribonucleases ,biology ,Metals and Alloys ,Metal Nanoparticles ,food and beverages ,DNA ,General Chemistry ,Molecular biology ,Catalysis ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,chemistry.chemical_compound ,chemistry ,Colloidal gold ,Materials Chemistry ,Ceramics and Composites ,biology.protein ,Biophysics ,Colorimetry ,Gold ,Naked eye - Abstract
Positively-charged gold nanoparticles can effectively differentiate long DNA and fragmented DNA, thus providing a simple and visual approach to colorimetric detection of nuclease activity.
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- 2011
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37. Composition of Free and Bound Phenolics from Paeonia suffruticosa Andr. Flowers and Their Antioxidant and α-Glucosidase inhibitory Activities
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CHEN Ling, WANG Xuefang, LI Zhining, ZHANG Lipan, LI Xiao, NING Erjuan
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paeoniasuffruticosa andr. flowers ,free phenolics ,esterified phenolics ,glycosidized phenolics ,insoluble bound phenolics ,antioxidant activity ,α-glucosidase inhibitory activity ,Food processing and manufacture ,TP368-456 - Abstract
Free phenolics (FP), esterified phenolics (EP), glycosidized phenolics (GP) and insoluble bound phenolics (IBP) were successively extracted from two varieties of peony flowers: Danfeng and Xiangyu. The contents of total phenolics, total flavonoids and the major components in different phenolics fractions were determined, and their antioxidant activity and α-glucosidase inhibitory activity were also studied. It was found that for the two varieties, the contents of total phenols (31.45 and 32.64 mg/g, respectively) and total flavonoids (41.11 and 40.67 mg/g, respectively) in FP were both the highest, followed by EP and GP, and the lower values were found in IBP. Each of the two FPs contained 17 components, with the major ones being resveratrol, 1,2,3,4,6-O-pentagalloylglucose and apigetrin. The major components of EP and GP were kaempferol-7-O-β-D-glucoside and apigetrin. The antioxidant activity of FP was the strongest among the four phenolics fractions. The 1,1-diphenyl-2-trinitrophenylhydrazine (DPPH), 2,2’-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) cation radical scavenging capacity and ferric reducing power of FP were 855.03, 367.10, and 230.54 µmol/g for Danfeng, and 499.06, 290.64, and 196.39 µmol/g for Xiangyu, respectively. For both varieties, FP exhibited the strongest inhibitory activity against α-glucosidase with half maximal inhibitory concentrations of 12.15 and 13.87 μg/mL, respectively. The research results are of reference significance for the utilization of polyphenols in Danfeng and Xiangyu.
- Published
- 2025
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