168 results on '"Miao-Miao Li"'
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2. Synthesis and crystal structure of dimethyl 4,4′-(propane-1,3-diylbis(oxy))dibenzoate, C19H20O6
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Miao-Miao Li and Yan-Ling Zheng
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2343334 ,Physics ,QC1-999 ,Crystallography ,QD901-999 - Abstract
[C19H20O6], monoclinic, C2/c (no. 15), a = 22.467(2) Å, b = 4.9925(5) Å, c = 15.8059(17) Å, β = 108.500(1)°, V = 1681.3(3) Å3, Z = 4, R gt(F) = 0.0309, wR ref(F 2) = 0.0852, T = 296(2) K.
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- 2024
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3. Genetic analyses of ancient tea trees provide insights into the breeding history and dissemination of Chinese Assam tea (Camellia sinensis var. assamica)
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Miao-Miao Li, Muditha K. Meegahakumbura, Moses C. Wambulwa, Kevin S. Burgess, Michael Möller, Zong-Fang Shen, De-Zhu Li, and Lian-Ming Gao
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Tea plant ,Hybrid origin ,Genetic diversity ,Domestication history ,Camellia sinensis var. assamica ,Camellia taliensis ,Biology (General) ,QH301-705.5 ,Botany ,QK1-989 - Abstract
Chinese Assam tea (Camellia sinensis var. assamica) is an important tea crop with a long history of cultivation in Yunnan, China. Despite its potential value as a genetic resource, its genetic diversity and domestication/breeding history remain unclear. To address this issue, we genotyped 469 ancient tea plant trees representing 26 C. sinensis var. assamica populations, plus two of its wild relatives (six and three populations of C. taliensis and C. crassicolumna, respectively) using 16 nuclear microsatellite loci. Results showed that Chinese Assam tea has a relatively high, but comparatively lower gene diversity (HS = 0.638) than the wild relative C. crassicolumna (HS = 0.658). Clustering in STRUCTURE indicated that Chinese Assam tea and its two wild relatives formed distinct genetic groups, with considerable interspecific introgression. The Chinese Assam tea accessions clustered into three gene pools, corresponding well with their geographic distribution. However, NewHybrids analysis indicated that 68.48% of ancient Chinese Assam tea plants from Xishuangbanna were genetic intermediates between the Puer and Lincang gene pools. In addition, 10% of the ancient Chinese Assam tea individuals were found to be hybrids between Chinese Assam tea and C. taliensis. Our results suggest that Chinese Assam tea was domesticated separately in three gene pools (Puer, Lincang and Xishuangbanna) in the Mekong River valley and that the hybrids were subsequently selected during the domestication process. Although the domestication history of Chinese Assam tea in southwestern Yunnan remains complex, our results will help to identify valuable genetic resources that may be useful in future tea breeding programs.
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- 2024
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4. Catalytic properties of CuO–Cr2O3–PbO ternary nanocomposites favorable for the pyrolysis of ammonium perchlorate
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Guang-pu Zhang, Yu-hang Cheng, Miao-miao Li, Lei Xiao, Hu Guo, Wei Jiang, and Ga-zi Hao
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Ternary nanocomposite ,Catalytic ,Pyrolysis ,AP ,Mechanical milling ,Chemical technology ,TP1-1185 - Abstract
In this study, CuO–Cr2O3–PbO ternary nanocomposites (TNCs) with different atomic ratios of Cu:Cr:Pb (5:2:8, 5:4:6, 5:6:4, 5:8:2) were synthesized by means of efficient mechanical milling. As confirmed by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM), uniform and impurity-free CuO–Cr2O3–PbO TNCs with an average grain size of 30 nm were successfully obtained. The catalytic properties of CuO–Cr2O3–PbO TNCs favorable for the pyrolysis of ammonium perchlorate (AP) were studied through thermogravimetric (TG) analysis and differential scanning calorimetry (DSC). The results show that TNC-8, which has an atomic ratio of 5:8:2 (Cu:Cr:Pb), exhibited the highest catalytic activity for the pyrolysis of AP when the pyrolytic temperature of AP decreased from 441.3 °C to 360.2 °C and the Gibbs free energy (ΔG≠) decreased from 199.8 kJ·mol−1 to 175.2 kJ·mol−1, as compared to CuO–Cr2O3–PbO nanocomposites with other atomic ratios.
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- 2022
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5. Theoretical Prediction of Rhenium Separation from Ammonium Perrhenate by Phonon–Photon Resonance Absorption
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Miao-Miao Li, Jing-Wen Cao, Xiao-Ling Qin, Xiao-Yan Liu, Xiao-Qing Yuan, Xiao-Tong Dong, Qing Guo, Yi Sun, and Peng Zhang
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Chemistry ,QD1-999 - Published
- 2022
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6. An empirical analysis of talent policy, executive incentive, and enterprise green technological innovation based on China’s A-share listed companies
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Yuan-Bo Zhang, Shi-You Qu, Hai-Bo Li, and Miao-Miao Li
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enterprise green technological innovation ,executive incentive ,talent policy ,China A-shares listed companies ,innovation-driven development strategy ,Environmental sciences ,GE1-350 - Abstract
This article investigates how talent policies affect corporate green technological innovation through executive incentive strategies based on signaling theory and principal-agent theory, by examining samples from 1,536 A-share listed companies between 2010 and 2020. The findings indicate that talent policy helps enterprises boost green technological innovation while accelerating it by improving executive compensation incentives. This effect path is more significant in high-tech enterprises and enterprises with weak solvency ratios. However, we find that the current talent policy has inhibited the green innovation of enterprises. The conclusions provide micro-evidence for the impact mechanism by which talent policy affects enterprise green technological innovation and offer scientifically based guidelines for optimizing talent policy to promote innovation-driven development strategy.
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- 2022
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7. A clinical prediction model for complicated appendicitis in children younger than five years of age
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Wei Feng, Xu-Feng Zhao, Miao-Miao Li, and Hua-Lei Cui
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Acute appendicitis ,Complicated appendicitis ,Children ,Pre-school age ,Pediatrics ,RJ1-570 - Abstract
Abstract Background No reliably specific method for complicated appendicitis has been identified in children younger than five years of age. This study aimed to analyze the independent factors for complicated appendicitis in children younger than five years of age, develop and validate a prediction model for the differentiation of simple and complicated appendicitis. Methods A retrospective study of 382 children younger than five years of age with acute appendicitis from January 2007 to December 2016 was conducted with assessments of demographic data, clinical symptoms and signs, and pre-operative laboratory results. According to intraoperative findings and postoperative pathological results, acute appendicitis was divided into simple and complicated appendicitis. Univariate and multivariate analyses were used to screen out the independent factors of complicated appendicitis, and develop a prediction model for complicated appendicitis. Then 156 such patients from January 2017 to December 2019 were collected as validation sample to validate the prediction model. Test performance of the prediction model was compared with the ALVARADO score and Pediatric Appendicitis Score (PAS). Results Of the 382 patients, 244 (63.9%) had complicated appendicitis. Age, white blood cell count, and duration of symptoms were the independent factors for complicated appendicitis in children younger than five years of age. The final predication model for complicated appendicitis included factors above. In validation sample, the prediction model exhibited a high degree of discrimination (area under the curve [AUC]: 0.830; 95% confidence interval [CI]: 0.762–0.885) corresponding to a optimal cutoff value of 0.62, and outperformed the PAS (AUC: 0.735; 95% CI: 0.658–0.802), ALVARADO score (AUC: 0.733; 95% CI: 0.657–0.801). Conclusion Age, white blood cell count, and duration of symptoms could be used to predict complicated appendicitis in children younger than five years of age with acute appendicitis. The prediction model is a novel but promising method that aids in the differentiation of acute simple and complicated appendicitis.
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- 2020
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8. Reversible Switching of Single-Molecule Magnetic Behaviour by Desorption/Adsorption of Solvent Ligand in a New Dy(III)-Based Metal Organic Framework
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Xiao-Jiao Song, Zhao-Bo Hu, Miao-Miao Li, Xin Feng, Ming Kong, Xiao-Ming Xue, Yi-Quan Zhang, and You Song
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single-molecule magnet ,Dy(III)-based ,metal organic framework ,induced by coordination solvent ,reversible on/off switch ,Chemistry ,QD1-999 - Abstract
Two metal-organic frameworks (MOFs), [Dy(BDC)(NO3)(DMF)2]n (1, H2BDC = terephthalic acid) and [Dy(BDC)(NO3)]n (1a), were synthesized. The structures of MOFs 1 and 1a are easy to be reversibly transformed into each other by the desorption or adsorption of coordination solvent molecules. Accordingly, their magnetic properties can also be changed reversibly, which realizes our goals of manipulating on/off single-molecule magnet behaviour. MOF 1 behaves as a single-molecule magnet either with or without DC field. Contrarily, no slow magnetic relaxation was observed in 1a both under zero field and applied field.
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- 2021
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9. Does Feedback Seeking Help Safety Performance Improvement? The Role of Consideration of Future Consequence
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Tian-tian Zhang and Miao-miao Li
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feedback seeking ,feedback environment ,safety performance ,consideration of future consequence ,three waves ,Psychology ,BF1-990 - Abstract
The purpose of this paper is to examine how feedback seeking impact safety performance through feedback environment and the moderating role of consideration of future consequence. Correlation data were collected from 202 participants in three industries of China. Results indicate that feedback seeking is positively associated with feedback environment and safety performance, the feedback environment mediated the relationship between feedback seeking and safety performance. However, the positive effect of feedback environment on safety performance is more significant when consideration of future consequence is high. Overall, the findings highlight the critical importance of individual features in the research on safety performance. The conclusion is conducive to a more detailed understanding of the antecedents that affect safety performance and provides a new perspective for the improvement of safety performance.
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- 2021
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10. Molecular mapping of YrTZ2, a stripe rust resistance gene in wild emmer accession TZ-2 and its comparative analyses with Aegilops tauschii
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Zhen-zhong WANG, Jing-zhong XIE, Li GUO, De-yun ZHANG, Gen-qiao LI, Ti-lin FANG, Yong-xing CHEN, Jun LI, Qiu-hong WU, Ping LU, Miao-miao LI, Hai-bin WU, Huai-zhi ZHANG, Yan ZHANG, Wu-yun YANG, Ming-cheng LUO, Fahima Tzion, and Zhi-yong LIU
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Triticum dicoccoides ,Puccinia striiformis f. sp. tritici ,SNP ,comparative genomics ,Agriculture (General) ,S1-972 - Abstract
Wheat stripe rust, caused by Puccinia striiformis f. sp. tritici (Pst), is a devastating disease that can cause severe yield losses. Identification and utilization of stripe rust resistance genes are essential for effective breeding against the disease. Wild emmer accession TZ-2, originally collected from Mount Hermon, Israel, confers near-immunity resistance against several prevailing Pst races in China. A set of 200 F6:7 recombinant inbred lines (RILs) derived from a cross between susceptible durum wheat cultivar Langdon and TZ-2 was used for stripe rust evaluation. Genetic analysis indicated that the stripe rust resistance of TZ-2 to Pst race CYR34 was controlled by a single dominant gene, temporarily designated YrTZ2. Through bulked segregant analysis (BSA) with SSR markers, YrTZ2 was located on chromosome arm 1BS flanked by Xwmc230 and Xgwm413 with genetic distance of 0.8 cM (distal) and 0.3 cM (proximal), respectively. By applying wheat 90K iSelect SNP genotyping assay, 11 polymorphic loci (consisting of 250 SNP markers) closely linked to YrTZ2 were identified. YrTZ2 was further delimited into a 0.8-cM genetic interval between SNP marker IWB19368 and SSR marker Xgwm413, and co-segregated with SNP marker IWB28744 (co-segregated with 28 SNP). Comparative genomics analyses revealed high level of collinearity between the YrTZ2 genomic region and the orthologous region of Aegilops tauschii 1DS. The genomic region between loci IWB19368 and IWB31649 harboring YrTZ2 is orthologous to a 24.5-Mb genomic region between AT1D0112 and AT1D0150, spanning 15 contigs on chromosome 1DS. The genetic and comparative maps of YrTZ2 provide a framework for map-based cloning and marker-assisted selection of YrTZ2.
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- 2018
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11. Distributed hydrological models for addressing effects of spatial variability of roughness on overland flow
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Sheng-tang Zhang, Yin Liu, Miao-miao Li, and Bo Liang
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Distributed hydrological model ,Overland flow ,Roughness ,Spatial variability ,River, lake, and water-supply engineering (General) ,TC401-506 - Abstract
In this study, we investigated the origin of the overland flow roughness problem and divided the current overland flow roughness research into three types, as follows: the first type of research takes into account the effects of roughness on the volume and velocity of surface runoff, flood peaks, and the scouring capability of flows, but has not addressed the spatial variability of roughness in detail; the second type of research considers that surface roughness varies spatially with different land usage types, land-cover conditions, and different tillage forms, but lacks a quantitative study of the spatial variability; and the third type of research simply deals with the spatial variability of roughness in each grid cell or land type. We present three shortcomings of the current overland flow roughness research, including (1) the neglect of roughness in distributed hydrological models when simulating the overland flow direction and distribution, (2) the lack of consideration of spatial variability of roughness in hydrological models, and (3) the failure to distinguish the roughness formulas in different overland flow regimes. To solve these problems, distributed hydrological model research should focus on four aspects in regard to overland flow: velocity field observations, flow regime mechanisms, a basic roughness theory, and scale problems.
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- 2016
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12. Influence of Smart Spring Support Parameters on Vibration Characteristics of Three Support Shafting
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Miao-miao Li, Liang-liang Ma, Chuan-guo Wu, Zhuo Li, and Ru-peng Zhu
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support parameters ,shafting ,dynamic model ,vibration characteristics ,vibration amplitude ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
Smart spring support is a kind of active damping device based on piezoelectric material. It can effectively suppress the vibration of a shaft system in an overly critical state by changing the stiffness and damping of the support. The support parameters have a significant impact on the vibration of the system. By studying the influence of the smart spring support parameters on the vibration characteristics of the transmission shaft system, the support parameters can be configured more reasonably so that the vibration of the transmission system can be reduced as much as possible. Based on the finite element method, this paper studies the influence of the stiffness, damping and mass of the smart spring support on the vibration characteristics of the three-support shafting. Firstly, the smart spring shafting test bed is built, and the vibration reduction performance test of the smart spring is carried out to verify the damping effect of the smart spring. Then, the shafting dynamic model is established by the finite element method, and the inherent characteristics of the system are analyzed. Finally, the influence of the stiffness, damping, mass and other parameters of the smart spring support on the dynamic response of the system is studied. The results show that increasing the stiffness of the smart spring support can effectively reduce the vibration amplitude of the system. The damping of the smart spring support has no obvious effect on the vibration of the shafting. The smaller the mass of the smart spring support, the more favorable the system is.
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- 2020
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13. Study on the Vibration Active Control of Three-Support Shafting with Smart Spring While Accelerating over the Critical Speed
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Miao-Miao Li, Liang-Liang Ma, Chuan-Guo Wu, and Ru-Peng Zhu
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multi-support shaft system vibration control ,combined simulation ,transverse bending vibration ,Smart Spring ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
Smart Spring is a kind of active vibration control device based on piezoelectric material, which can effectively suppress the vibration of the shaft system in an over-critical state, and the selection of control strategy has great influence on the vibration reduction effect of the Smart Spring. In this paper, the authors investigate the control of the over-critical vibration of the transmission shaft system with Smart Spring, based on the ADAMS and MATLAB joint simulation method. Firstly, the joint simulation model of three-support shafting with Smart Spring is established, and the over-critical speed simulation analysis of the three-support shafting under the fixed control force of the Smart Spring is carried out. The simulation results show that the maximum vibration reduction rate is 71.6%. The accuracy of the joint simulation model is verified by the experiment of the three-support shafting subcritical vibration control. On this basis, a function control force vibration control strategy with time-varying control force is proposed. By analyzing the axis orbit of the shafting, the optimal fixed control force at different speeds is obtained, the control force function is determined by polynomial fitting, and the shafting critical crossing simulation under the function control force is carried out. The simulation results show that the displacement response of the shafting under the function control force is less than that under the fixed control force in the whole speed range.
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- 2020
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14. Domestication Origin and Breeding History of the Tea Plant (Camellia sinensis) in China and India Based on Nuclear Microsatellites and cpDNA Sequence Data
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Muditha K. Meegahakumbura, Moses C. Wambulwa, Miao-Miao Li, Kishore K. Thapa, Yong-Shuai Sun, Michael Möller, Jian-Chu Xu, Jun-Bo Yang, Jie Liu, Ben-Ying Liu, De-Zhu Li, and Lian-Ming Gao
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Camellia sinensis ,nSSR ,cpDNA sequence ,domestication center ,breeding history ,Plant culture ,SB1-1110 - Abstract
Although China and India are the two largest tea-producing countries, the domestication origin and breeding history of the tea plant in these two countries remain unclear. Our previous study suggested that the tea plant includes three distinct lineages (China type tea, Chinese Assam type tea and Indian Assam type tea), which were independently domesticated in China and India, respectively. To determine the origin and historical timeline of tea domestication in these two countries we used a combination of 23 nSSRs (402 samples) and three cpDNA regions (101 samples) to genotype domesticated tea plants and its wild relative. Based on a combination of demographic modeling, NewHybrids and Neighbour joining tree analyses, three independent domestication centers were found. In addition, two origins of Chinese Assam type tea were detected: Southern and Western Yunnan of China. Results from demographic modeling suggested that China type tea and Assam type tea first diverged 22,000 year ago during the last glacial maximum and subsequently split into the Chinese Assam type tea and Indian Assam type tea lineages 2770 year ago, corresponding well with the early record of tea usage in Yunnan, China. Furthermore, we found that the three tea types underwent different breeding histories where hybridization appears to have been the most important approach for tea cultivar breeding and improvements: a high proportion of the hybrid lineages were found to be F2 and BCs. Collectively, our results underscore the necessity for the conservation of Chinese Assam type tea germplasm and landraces as a valuable resource for future tea breeding.
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- 2018
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15. Review of the genus Apotrechus in China (Orthoptera, Gryllacrididae, Gryllacridinae)
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Miao-Miao Li, Xianwei Liu, and Kai Li
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Zoology ,QL1-991 - Abstract
In the present paper, the genus Apotrechus Brunner-Wattenwyl, 1888 is revised. Two new species from China are described and illustrated: Apotrechus quadratus sp. n. and Apotrechus truncatolobus sp. n.. A new key and the distributional data are given.
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- 2015
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16. Are superhalogens without halogen ligand capable of transcending traditional halogen-based superhalogens? Ab initio case study of binuclear anions based on pseudohalogen ligand
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Jin-Feng Li, Yin-Yin Sun, Hongcun Bai, Miao-Miao Li, Jian-Li Li, and Bing Yin
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Physics ,QC1-999 - Abstract
The superhalogen properties of polynuclear structures without halogen ligand are theoretically explored here for several [M2(CN)5]−1 (M = Ca, Be) clusters. At CCSD(T) level, these clusters have been confirmed to be superhalogens due to their high vertical electron detachment energies (VDE). The largest one is 9.70 eV for [Ca2(CN)5]−1 which is even higher than those of corresponding traditional structures based on fluorine or chlorine ligands. Therefore the superhalogens stronger than the traditional halogen-based structures could be realized by ligands other than halogen atoms. Compared with CCSD(T), outer valence Green’s function (OVGF) method either overestimates or underestimates the VDEs for different structures while MP2 results are generally consistent in the aspect of relative values. The extra electrons of the highest VDE anions here aggregate on the bridging CN units with non-negligible distribution occurring on other CN units too. These two features lower both the potential and kinetic energies of the extra electron respectively and thus lead to high VDE. Besides superhalogen properties, the structures, relative stabilities and thermodynamic stabilities with respect to the detachment of cyanide ligand were also investigated. The sum of these results identifies the potential of polynuclear structures with pseudohalogen ligand as suitable candidates with enhanced superhalogens properties.
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- 2015
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17. A novel role of human holliday junction resolvase GEN1 in the maintenance of centrosome integrity.
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Min Gao, Jannie Rendtlew Danielsen, Lei-Zhen Wei, Dong-Ping Zhou, Qian Xu, Miao-Miao Li, Zhao-Qi Wang, Wei-Min Tong, and Yun-Gui Yang
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Medicine ,Science - Abstract
The maintenance of genomic stability requires accurate genome replication, repair of DNA damage, and the precise segregation of chromosomes in mitosis. GEN1 possesses Holliday junction resolvase activity in vitro and presumably functions in homology driven repair of DNA double strand breaks. However, little is currently known about the cellular functions of human GEN1. In the present study we demonstrate that GEN1 is a novel centrosome associated protein and we characterize the various phenotypes associated with GEN1 deficiency. We identify an N-terminal centrosome localization signal in GEN1, which is required and sufficient for centrosome localization. We report that GEN1 depletion results in aberrant centrosome numbers associated with the formation of multiple spindle poles in mitosis, an increased number of cells with multi-nuclei, increased apoptosis and an elevated level of spontaneous DNA damage. We find homologous recombination severely impaired in GEN1 deficient cells, suggesting that GEN1 functions as a Holliday junction resolvase in vivo as well as in vitro. Complementation of GEN1 depleted cells with various GEN1 constructs revealed that centrosome association but not catalytic activity of GEN1 is required for preventing centrosome hyper-amplification, formation of multiple mitotic spindles, and multi-nucleation. Our findings provide novel insight into the biological functions of GEN1 by uncovering an important role of GEN1 in the regulation of centrosome integrity.
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- 2012
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18. Assessment of arteriosclerosis based on multiscale cross approximate entropy of human finger pulse wave
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Na, Ta, Hai-Cheng, Wei, and Miao-Miao, Li
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Biomaterials ,Heart Rate ,Arteriosclerosis ,Entropy ,Biomedical Engineering ,Biophysics ,Humans ,Signal Processing, Computer-Assisted ,Health Informatics ,Bioengineering ,Algorithms ,Information Systems - Abstract
BACKGROUND: Arteriosclerosis is one of the diseases that endanger human health. There is a large amount of information in pulse wave signals to reflect the degree of arteriosclerosis. OBJECTIVE: The degree of arteriosclerosis is assessed by analyzing pulse wave signal and calculating multi-scale entropy values. METHODS: A method based on the multiscale cross-approximate entropy of the pulse wave of the human finger is proposed to assess the degree of arteriosclerosis. A total of 86 subjects were divided into three groups. The data of 1000 pulse cycles were selected in the experiment, and the multiscale cross-approximate entropy was calculated for the climb time and pulse wave peak interval. Independent sample t-test analysis gives the small-scale cross-approximate entropy of the two time series of climb time and pulse wave peak interval as p< 0.001 in Groups 1 and 2. The large-scale cross-approximate entropy of the two time series of climb time and pulse wave peak interval is p< 0.017 in Groups 2 and 3. RESULTS: Using the proposed algorithm, the results showed that the small-scale cross-approximate entropy of climb time and pulse wave peak interval could reflect the degree of arteriosclerosis in the human body from the perspective of autonomic nerve function. The large-scale cross-approximate entropy of climb time and pulse wave peak interval confirmed the effect of diabetes on the degree of arteriosclerosis. CONCLUSIONS: The results demonstrate the multiscale cross-approximate entropy is a comprehensive index to evaluate the degree of human arteriosclerosis.
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- 2022
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19. Synthesis and crystal structure of dimethyl 4,4′-(propane-1,3-diylbis(oxy))dibenzoate, C19H20O6.
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Miao-Miao, Li and Yan-Ling, Zheng
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CRYSTAL structure ,ETHANES ,BENZOATES - Abstract
[C
19 H20 O6 ], monoclinic, C2/c (no. 15), a = 22.467(2) Å, b = 4.9925(5) Å, c = 15.8059(17) Å, β = 108.500(1)°, V = 1681.3(3) Å3 , Z = 4, Rgt (F) = 0.0309, wRref (F2 ) = 0.0852, T = 296(2) K. [ABSTRACT FROM AUTHOR]- Published
- 2024
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20. Crystal structure of methyl 3-methoxy-4-(2-methoxy-2-oxoethoxy)benzoate, C12H14O6.
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Yan-Ling, Zheng and Miao-Miao, Li
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CRYSTAL structure ,BENZOATES - Abstract
C
12 H14 O6 , triclinic, P 1 ‾ (no. 2), a = 5.3644(9) Å, b = 11.1880(18) Å, c = 11.4159(18) Å, α = 66.378(2)°, β = 79.970(2)°, γ = 78.138(2)°, V = 611.11(17) Å3 , Z = 2, Rgt (F) = 0.0430, wRref (F2 ) = 0.1260, T = 296(2) K. [ABSTRACT FROM AUTHOR]- Published
- 2024
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21. Genome-wide identification of NDR1/HIN1-like genes in kiwifruit and function analysis of AeNHL17 in response to disease resistance
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Min Zhang, Rong Fu, Miao-Miao Lin, Jin-Bao Fang, Ran Wang, Yu-Kuo Li, Jin-Yong Chen, Lei-Ming Sun, and Xiu-Juan Qi
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NDR1/HIN1-like gene family ,Kiwifruit ,Psa ,AeNHL17 ,Disease resistance ,Botany ,QK1-989 - Abstract
Abstract Background NDR1/HIN1-like (NHL) genes play crucial roles in Psa resistance. Kiwifruit canker, caused by Pseudomonas syringae pv. Actinidiae (Psa) infection is one of the most serious diseases affecting the kiwifruit industry. However, the key NHL has not yet been identified in kiwifruit. Results In this study, we conducted a genome-wide identification of NHL family in kiwifruit (Actinidia eriantha). A total of 33 AeNHLs were divided into five domain-conserved subfamilies, which were mainly assigned into phytohormones and defense responses. The expression of AeNHL genes was analyzed to identify key genes in response to Psa, and we found AeNHL17 was highly expressed upon Psa inoculation. Transgenic tobacco overexpressing AeNHL17 presented higher resistance to Psa than wild-type (WT) tobacco, implying a key role for AeNHL17 in Psa resistance. Finally, we carried out a stable genetic transformation of kiwifruit (A. chinensis), which is sensitive to Psa, and found that the overexpression of AeNHL17 increased resistance to infection. AeNHL17-silenced plants exhibited larger disease lesions than control plants. Conclusions Our findings revealed the function of AaNHL17 in Psa resistance, providing new data regarding the functional analysis of the NHL gene family in kiwifruit.
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- 2024
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22. Anti-inflammatory Dimeric Benzophenones from an Endophytic Pleosporales Species
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Hui-Ting Zeng, Yi-Hu Yu, Xi Zeng, Miao-Miao Li, Xia Li, Shan-Shan Xu, Zong-cai Tu, and Tao Yuan
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Lipopolysaccharides ,Pharmacology ,Molecular Structure ,Macrophages ,Proton Magnetic Resonance Spectroscopy ,Organic Chemistry ,Anti-Inflammatory Agents ,Pharmaceutical Science ,Nitric Oxide ,Analytical Chemistry ,Benzophenones ,Mice ,RAW 264.7 Cells ,Ascomycota ,Complementary and alternative medicine ,Drug Discovery ,Animals ,Molecular Medicine ,Carbon-13 Magnetic Resonance Spectroscopy ,Dimerization - Abstract
Eight new polyketides, including three dimeric benzophenones, named dipleosporones A-C (
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- 2022
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23. A green, environment-friendly, high-consolidation-strength composite dust suppressant derived from xanthan gum
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Yanyun Zhao, Shijian Yu, Jian Qiao, Susu Bian, Miao-Miao Li, and Xiangming Hu
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Materials science ,business.industry ,Health, Toxicology and Mutagenesis ,Polysaccharides, Bacterial ,Composite number ,Emulsion polymerization ,Dust ,General Medicine ,Coal dust ,Coal Mining ,complex mixtures ,Pollution ,respiratory tract diseases ,Viscosity ,Coal ,Compressive strength ,Chemical engineering ,medicine ,Environmental Chemistry ,Wetting ,business ,Xanthan gum ,medicine.drug - Abstract
To solve issues of low consolidation strength, poor dust suppression effect, and secondary pollution of the current coal dust suppressors, a greener and higher-consolidation-strength composite dust suppressor was synthesized by the radical polymerization of xanthan gum (XG) as the graft substrate, methyl acrylate (MA), and vinyl acetate (VAc) as the graft monomers. Taking compressive strength as the main optimization index and viscosity and surface tension as the secondary indices, the optimum ratio of MA:VAc was 3:5 and the optimum solid content was 2%. Experiments reveal that the prepared dust suppressant can naturally infiltrate into coal to form a hard solidified layer. At a wind speed of 10 m/s, the solidified layer still maintained structural integrity, indicating that the dust suppressant exhibits a good dust fixation effect. The dust suppressant can not only maintain relatively stable performance for a period of time but also degrade naturally. Furthermore, molecular dynamics simulation reveals not only the interaction mechanism between coal molecules and the dust suppressor but also the wetting mechanism of the dust suppressor. Experimental and simulation results reveal that as a multifunctional dust suppressor with excellent performance, the as-prepared dust suppressor demonstrates the immense potential for the control of coal dust. Graphical abstract.
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- 2021
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24. Enantioselective trapping of palladium-stabilized oxo-1,4-dipoles with photochemically generated ketenes
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Wen-Jing Xiao, Miao-Miao Li, Yu-Qing Xiao, Liang-Qiu Lu, and Bao-Le Qu
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Dipole ,Multidisciplinary ,Materials science ,chemistry ,Enantioselective synthesis ,chemistry.chemical_element ,Trapping ,Photochemistry ,Palladium - Published
- 2021
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25. [Four Chinese patent medicines for regulating stomach for functional dyspepsia: a rapid health technology assessment]
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Si-Min, Xu, Ze-Qi, Dai, Xue, Wu, Miao-Miao, Li, and Xing, Liao
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China ,Technology Assessment, Biomedical ,Stomach ,Humans ,Capsules ,Nonprescription Drugs ,Dyspepsia ,Sulfides ,Chlorobenzenes ,Domperidone ,Drugs, Chinese Herbal ,Tablets - Abstract
This study evaluated and compared the efficacy, safety and economy of four Chinese patent medicines(CPMs) in the treatment of functional dyspepsia(FD) using the method of rapid health technology assessment. It aims to provide decision-makers with rapid decision-making information. The eight Chinese and English databases were comprehensively and systematically searched for the relevant clinical research. Studies were screened and evaluated. A total of 110 studies were identified, including 95 randomized controlled trials(RCTs), 7 controlled clinical trials(CCTs), 7 systematic review/Meta-analysis and 1 economic evaluation, among which 28 were Dalitong Granules, 49 were Zhizhu Kuanzhong Capsules, 3 were Biling Weitong Granules and 30 were Qizhi Weitong Granules(Tablets/Capsules). The quality of the included literature was generally low. The efficacy of four CPMs alone or combined with western medicine in the treatment of FD is different. Dalitong Granules was used to treat motility disorder in FD. Zhizhu Kuanzhong Capsules and Qizhi Weitong Granules(Tablets/Capsules) can treat FD patients with anxiety and depression. Qizhi Weitong Granules(Tablets/Capsules) were mainly used in FD for perimenopausal patients. There were no serious adverse reactions in the clinical study of four CPMs in the treatment of FD. Dalitong Granules has better effects than mosapride in the treatment of FD, but the cost is slightly higher. The cost-effectiveness ratio of Zhizhu Kuanzhong Capsules in the treatment of FD patients with anxiety and depression was lower than that of Domperidone. In terms of average daily price, Qizhi Weitong Tablets has the highest price(27.00 yuan per day), Qizhi Weitong Granules has the lowest price(5.04 yuan per day), Biling Weitong Granules has a relatively high price(15.53 yuan per day), followed by Dalitong Granules(13.03 yuan per day). The evidence of Dalitong Granules covered the efficacy, safety and economy, which is relatively complete compared with the other three drugs. It has effective potential in the treatment of motility disorder in FD. Further research in this field in the future is needed.
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- 2022
26. [Scoping review of clinical evidence of Chinese patent medicines for digestive system diseases in children]
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Xue, Wu, Ze-Qi, Dai, Si-Min, Xu, Miao-Miao, Li, and Xing, Liao
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Diarrhea ,China ,Digestive System Diseases ,Humans ,Nonprescription Drugs ,Medicine, Chinese Traditional ,Child ,Drugs, Chinese Herbal ,Retrospective Studies - Abstract
This study analyzed and reported the basic information and clinical evidence of Chinese patent medicines for digestive system diseases in children in a scoping review manner. Based on the drug instructions, the basic information of Chinese patent medicines for digestive system diseases in children was obtained by searching the three lists of national medicines. At the same time, the relevant clinical literatures from the first day of establishment to March 7, 2022 were obtained from Chinese and English databases. According to the screening criteria, 39 Chinese patent medicines were included, involving 8 dosage forms. Eight Chinese medicines including Crataegi Fructus, Poria, Citri Reticulatae Pericarpium, Hordei Fructus Germinatus, Arecae Semen, Massa Medicata Fermentata, Dioscoreae Rhizoma, and Atractylodis Macrocephalae Rhizoma were frequently used, and the main effects were invigorating spleen, checking diarrhea, promoting digestion, clearing heat, and harmonizing stomach. The indications for Chinese patent medicines were mainly diarrhea, anorexia, food accumulation, dyspepsia, and rotavirus enteritis in children. Among all drug instructions, only 4 mentioned adverse reactions and 6 mentioned contraindications. Ninety-two clinical studies were included ultimately, including 84 randomized controlled studies, 2 systematic reviews/Meta-analysis, 1 retrospective study, and 5 case series. The literatures only covered 21 kinds of Chinese patent medicines, with the most studies related to Xingpi Yanger Granules, accounting for 32.6% of the total literature volume. The sample size in the literatures was mainly focused on 51-200 cases, and 51-100 cases were selected by the most literatures, accounting for 34.45%. The interventions of the experimental group were mainly Chinese patent medicines or Chinese patent medicines combined with western medicines. The literatures with treatment course of 0-7 d accounted for the largest proportion(51.10%). The effective rate and symptom improvement time were used as the indexes to evaluate the results. The main adverse reactions were vomiting, constipation, nausea, rash, cold, diarrhea, redness of the skin around the umbilicus, or red itchy skin. The analysis of this study found that Chinese patent medicines have good curative effect and research prospects in the treatment of digestive system diseases in children. However, most clinical evidence has problems, such as limited indexes to evaluate the results, lack of traditional Chinese medicine characteristics, uneven quantity and low quality of Chinese patent medicine literatures, and insufficient specification of instructions. In the future, high-quality clinical studies on this field should be actively carried out, and economic studies and clinical comprehensive evaluation of Chinese patent medicines should be strengthened to explore the characteristics and advantages of its treatment, so as to provide decision-making basis for finding the accurate clinical positioning and promoting the rational clinical application of Chinese patent medicines for treating digestive system diseases in children.
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- 2022
27. Peripheral CD4+ T cell phenotype and brain microglial activation associated with cognitive heterogeneity in aged rats
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Lian Yu, Miao-Miao Liu, Mei-Qi Guan, Rui Wang, Xiao-Rong Yang, Xiu-Min Zhang, Jing-Jing Wei, Shu-Fen Wu, Hong Gu, Qiang Fu, Jun-Hong Guo, and Yan-Li Li
- Subjects
Aging-associated cognitive decline ,Cognitive heterogeneity ,Microglial activation ,Th17/Treg cells ,Inflammation ,Immunologic diseases. Allergy ,RC581-607 ,Geriatrics ,RC952-954.6 - Abstract
Abstract Cognitive decline is a critical hallmark of brain aging. Although aging is a natural process, there is significant heterogeneity in cognition levels among individuals; however, the underlying mechanisms remain uncertain. In our study, we classified aged male Sprague‒Dawley rats into aged cognition-unimpaired (AU) group and aged cognition-impaired (AI) group by using an attentional set-shifting task. The transcriptome sequencing results of medial prefrontal cortex (mPFC) demonstrated significant differences in microglial activation and inflammatory response pathways between the two groups. Specifically, compared to AU rats, AI rats exhibited a greater presence of CD86-positive microglia and major histocompatibility complex class II (MHC-II)-positive microglia, along with elevated inflammatory molecules, in mPFC. Conversely, AI rats exhibited a reduction in the percentage of microglia expressing CD200R and the anti-inflammatory molecules Arg-1 and TGF-β. Additionally, peripheral blood analysis of AI rats demonstrated elevated levels of Th17 and Th1 cells, along with proinflammatory molecules; however, decreased levels of Treg cells, along with anti-inflammatory molecules, were observed in AI rats. Our research suggested that peripheral Th17/Treg cells and central microglial activation were associated with cognitive heterogeneity in aged rats. These findings may provide a new target for healthy aging.
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- 2024
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28. Genome-wide analysis of DNA methylation and transcriptional changes associated with overwintering memory in Brassica rapa L. grown in the field
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Li-jun Liu, Yuan-yuan Pu, Yan Fang, Li Ma, Gang Yang, Zao-xia Niu, Wang-tian Wang, Jin-li Yue, Liang Bian, Miao-miao Liu, Jun-yan Wu, and Wan-cang Sun
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Brassica rapa L. ,DNA methylation ,Differentially methylated regions ,Differentially methylated promoter ,Differentially methylated genes ,Overwintering memory ,Agriculture - Abstract
Abstract Background Winter rapeseed, the sole overwintering oilseed crop in northern China, emphasizes winter resilience, yet epigenetic regulatory mechanisms governing overwintering memory remain poorly understood. Results In this study, the root collar tissues from the robust cold-resistant variety Longyou-7 were sampled during the pre-winter period (S1), overwintering periods (S2–S5), and re-greening period (S6), to analyze overall genomic DNA methylation levels using high-performance liquid chromatography (HPLC). The result showed that DNA methylation level exceeded 80% in the S1 stage. Throughout the overwintering periods, methylation levels displayed a decreasing trend in S3, followed by an increase in S5, and a pronounced decrease in S6. Consequently, S1, S3, S5, and S6 periods were chosen for whole-genome bisulfite sequencing analyses to elucidate the overwintering memory mechanisms of Longyou-7. The result revealed that DNA methylation primarily occurs in the CG context in Longyou-7. However, methylation of mC sites is most prevalent in the CHH type, gradually decreasing during overwintering periods. Analysis of methylation patterns in specific genomic regions of Longyou-7 showed that the highest methylation levels in the intergenic region. Moreover, mC sites in repeats and transposon elements are distributed differently across the three contexts. Subsequently, differentially methylated regions and promoters of Longyou-7 were identified during various periods compared to the S1 stage, followed by joint analysis with transcriptome sequencing. Functional enrichment analysis highlighted the involvement of most overlapping genes in the MAPK signaling pathway, plant hormone signal transduction, and starch and sucrose metabolism pathways. Changes in candidate gene expression within these three pathways correlated closely with DNA methylation levels. Conclusions Our findings underscored the critical role of DNA methylation in regulating the expression of overwintering memory genes in winter rapeseed. These results offer a comprehensive insights into the epigenetic regulatory mechanisms governing winter rapeseed's overwintering memory, while identified overwintering memory genes served as crucial genetic resources for multifaceted breeding of winter-resistant varieties. Graphical Abstract
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- 2024
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29. Barriers and opportunities in pancreatic cancer immunotherapy
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Yixin Ju, Dongzhi Xu, Miao-miao Liao, Yutong Sun, Wen-dai Bao, Fan Yao, and Li Ma
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Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Abstract Pancreatic ductal adenocarcinoma (PDAC) presents a fatal clinical challenge characterized by a dismal 5-year overall survival rate, primarily due to the lack of early diagnosis and limited therapeutic efficacy. Immunotherapy, a proven success in multiple cancers, has yet to demonstrate significant benefits in PDAC. Recent studies have revealed the immunosuppressive characteristics of the PDAC tumor microenvironment (TME), including immune cells with suppressive properties, desmoplastic stroma, microbiome influences, and PDAC-specific signaling pathways. In this article, we review recent advances in understanding the immunosuppressive TME of PDAC, TME differences among various mouse models of pancreatic cancer, and the mechanisms underlying resistance to immunotherapeutic interventions. Furthermore, we discuss the potential of targeting cancer cell-intrinsic pathways and TME components to sensitize PDAC to immune therapies, providing insights into strategies and future perspectives to break through the barriers in improving pancreatic cancer treatment.
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- 2024
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30. A Strategy for the Analysis of the Far-Infrared Vibrational Modes of Hydrogen-Disordered Ice V
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Xiao-Ling Qin, Xiao-Qing Yuan, Xue-Chun Wang, Peng Zhang, Xiao-Tong Ma, Xu-Liang Zhu, Jia-Le Yu, Jing-Wen Cao, Hao-Cheng Wang, and Miao-Miao Li
- Subjects
Materials science ,Hydrogen ,Ice V ,Fingerprint (computing) ,Intermolecular force ,chemistry.chemical_element ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Molecular physics ,0104 chemical sciences ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,General Energy ,chemistry ,Far infrared ,Normal mode ,Molecular vibration ,Physical and Theoretical Chemistry ,0210 nano-technology - Abstract
Analysis of the intermolecular vibrational modes in a fingerprint region is always difficult. It is particularly hard to figure out the normal modes, especially in the far-infrared (IR) region, whi...
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- 2021
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31. Effect mechanism of copper ions on photocatalytic activity of TiO2/graphene oxide composites for phenol-4-sulfonic acid photodegradation
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Cui-Xiang Guo, Jia-Hao Shen, Miao-Miao Li, Lian-Feng Chu, Ya-Jun Guo, and Ya-Ping Guo
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chemistry.chemical_classification ,Hydroquinone ,Maleic acid ,Metal ions in aqueous solution ,02 engineering and technology ,Sulfonic acid ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,Biomaterials ,chemistry.chemical_compound ,Colloid and Surface Chemistry ,Adsorption ,chemistry ,Titanium dioxide ,Photocatalysis ,Composite material ,0210 nano-technology ,Photodegradation - Abstract
Organic pollutants in electroplating wastewater can be removed by photodegradation, however the effect mechanism of heavy metal ions on photocatalytic activity still remains unknown. Herein, we firstly reported the self-assembly synthesis of titanium dioxide/reduced graphene oxide (TiO2/rGO) composites for phenol-4-sulfonic acid (PSA) removal, and investigated the effects of Cu2+ ions on photocatalytic efficiency. During the self-assemble process, rGO nanosheets were connected together to form network macropores, and simultaneously induced the deposition of hierarchically nanostructured TiO2 microspheres. The synergetic effects of TiO2 microspheres and rGO nanosheets improved the photocatalytic activity by enhancing light adsorption ability, stabilizing electron-hole separation and decreasing band gap energy. The Cu2+ ions in wastewater showed positive and negative effects on PSA photodegradation. In the photocatalytic reaction, the electron-induced reduction reaction of Cu(II) into Cu(0) or Cu(I) took place, which inhibited electron-hole recombination and thus enhanced photocatalytic activity. However, the high chemical stability of PSA-Cu(II) complex compounds held back PSA photodegradation. The appropriate concentrations of Cu2+ ions at around 25 mg/L accelerated PSA photodegradation over TiO2/rGO composites. The PSA degradation into CO2 and H2O was performed by using hydroquinone, benzoquinone and maleic acid as degradation intermediates. Hence, TiO2/rGO composites are novel multifunctional photocatalysts to purify electroplating wastewater.
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- 2021
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32. Taming Chiral Quaternary Stereocenters via Remote H-Bonding Stereoinduction in Palladium-Catalyzed (3+2) Cycloadditions
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Yu‐Qing Xiao, Miao‐Miao Li, Zheng‐Xin Zhou, Yu‐Jie Li, Meng‐Yue Cao, Xiao‐Peng Liu, Hai‐Hua Lu, Li Rao, Liang‐Qiu Lu, André M. Beauchemin, and Wen‐Jing Xiao
- Subjects
General Medicine ,General Chemistry ,Catalysis - Abstract
Ring-opening transformations of donor-acceptor (D-A) cyclopropanes enable the rapid assembly of complex molecules. However, the enantioselective formation of chiral quaternary stereocenters using substrates bearing two different acceptors remains a challenge. Herein, we describe the first palladium-catalyzed highly diastereo- and enantioselective (3+2) cycloaddition of vinyl cyclopropanes bearing two different electron-withdrawing groups, a subset of D-A cyclopropanes. The key to the success of this reaction is the remote stereoinduction through hydrogen bond from chiral ligands, which thereby addressed the aforementioned challenge. A variety of chiral five-membered heterocycles were produced in good yields and with high stereoselectivity (up to 99 % yields, 99 : 1 er and19 : 1 dr). In-depth mechanistic investigations, including control experiments and theoretical calculations, revealed the origin of the stereoselectivity and the importance of H-bonding in stereocontrol.
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- 2022
33. [Scoping review of rapid health technology assessment]
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Miao-Miao, Li, Xue, Wu, Si-Min, Xu, Ze-Qi, Dai, Hui, Zhao, and Xing, Liao
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China ,Technology Assessment, Biomedical ,Publications - Abstract
This study aims to summarize the research on rapid health technology assessment(RHTA) based on scoping review, which is expected to serve as a reference for future research on RHTA. First, articles on RHTA were retrieved from both Chinese and English databases. After data screening and extraction by two personnel independently, descriptive analysis was conducted on the results, and evidence distribution was analyzed based on tables, bar charts, line charts, radar charts, and pie charts. Finally, a total of 82 eligible articles were included and the characteristics were as follows.(1) Articles on RHTA were mainly published from 2011 to 2022. The number of articles showed an obvious increase from 2014 and surged in 2019.(2) Among the journals with the above RHTA papers published, Chinese Journal of New Drugs(21.5%), Evaluation and Analysis of Drug-Use in Hospitals of China(16.9%), and Chinese Pharmacy(15.4%) topped the Chinese journals in the number of the papers, while International Journal of Technology Assessment in Health Care(23.5%), Reviews in Medical Virology(11.8%), and Value in Health(11.8%) came out on top in the English journals.(3)The RHTA of drugs(especially western medicine)(68.7%) dominated the eligible articles, followed by the RHTA of therapy technology(13.1%), detection technology(5.1%), and diagnosis technology(1.0%). There was a significant gap in the number of studies among different health technology categories and an imbalance in the types of health technologies involved in the overall RHTA studies.(4) RHTA of tumors has been the research focus in recent years. In summary, RHTA plays a positive role in rapid health decision-making, but there is a lack of primary data sources at present. Compared with the systematic review, Meta-analysis, and pharmacoeconomic studies, a few reports on health technology assessment(HTA) were included. In the future, research on the evaluation of the safety, efficacy, cost effectiveness and social applicability of health technologies should be further strengthened.
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- 2022
34. [Enlightenment of WHO guideline on institutionalizing health technology assessment mechanism for traditional Chinese medicine]
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Ze-Qi, Dai, Xue, Wu, Si-Min, Xu, Miao-Miao, Li, Hui, Zhao, and Xing, Liao
- Subjects
Technology Assessment, Biomedical ,Medicine, Chinese Traditional ,Reference Standards ,World Health Organization - Abstract
To promote the institutionalization of the health technology assessment(HTA) mechanism in various countries, World Health Organization(WHO) has published the Institutionalizing Health Technology Assessment Mechanisms: a How to Guide to introduce five steps of institutionalizing the HTA mechanism systematically, specifically,quot;establishing a mandate; establishing the legal framework; reviewing or establishing the legal framework; establishing institutional and governance arrangements; processes and evidence required for assessment and appraisal; and monitoring and evaluationquot;. Traditional Chinese medicine(TCM) HTA can provide scientific information and decision-making evidence for decision-makers at all levels to select TCM health technology reasonably, and promote the high-quality development of the TCM healthcare system. However, TCM HTA is in its infancy, and it is imperative to carry out relevant work under the guidance of global standard documents to ensure standardization, transparency, and fairness. In light of the WHO guidance, this research group put forward the necessity and logical framework for the institutionalizing HTA mechanism of TCM, which is helpful to establish the institutionalizing HTA mechanism in line with national conditions and suitable for TCM, provide scientific guidance for the research of TCM HTA, and contribute to TCM healthcare decision-making.
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- 2022
35. [Scoping review of domestic and overseas hospital-based health technology assessment]
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Si-Min, Xu, Ze-Qi, Dai, Xue, Wu, Miao-Miao, Li, and Xing, Liao
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China ,Technology Assessment, Biomedical ,Bibliometrics ,Publications ,Hospitals - Abstract
This paper systematically sorted out the related research on hospital-based health technology assessment(HB-HTA) and clarified the research status of this field to provide a basis for the future research direction and focus of HTA in traditional Chinese medicine(TCM) hospitals. Based on the scoping review, relevant research papers were retrieved from Chinese databases(including CNKI, Wanfang, VIP, and SinoMed) and PubMed and analyzed. Among the included 99 papers, the earliest one was published in 2005 in China, and the number of papers has been increasing since 2016. In terms of journals, the included papers were published in 39 journals, including 24 core ones and 2 SCI ones. In terms of the number of publications, the Chinese Journal of Evidence-Based Medicine accounted for the majority(n=6). Among the 175 authors involved, three of them published 15 papers, respectively, accounting for 20.83% and ranking the top, and they came from Renmin University of China and the National Health Commission of China. There were 38 first units dominated by hospitals. Hebei General Hospital published the most papers(n=10), followed by Renmin University of China(n=9) and the National Health Commission of China(n=7). In terms of research type, the research papers were dominated by evaluation and practice ones(n=29), followed by reviews(n=20). In terms of research topic, the research was mainly carried out from devices(n=26) and macro-perspective scope(n=24). Half of the research in China was funded. For 27 research papers published abroad, the number of publications in the past five years was small, with 16 countries involved. Developed countries paid more attention to this field than developing countries. Especially in Europe and the US, the publishing institutions were mainly universities, and the types of research were mainly interviews and evaluation or practice. In recent years, the attention of HB-HTA in China has been increasing year by year, and the development of related projects has provided a scientific decision-making basis for the admission and management of new technologies in hospitals in China. However, there are few researchers and institutions in this field, and the research scope is small. In the future, more investment is needed to encourage more hospitals, especially TCM hospitals, to carry out HB-HTA, explore the HB-HTA system suitable for Chinese conditions, and improve the scientific decision-making of hospitals.
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- 2022
36. [Multi-criteria decision analysis in clinical comprehensive evaluation of Chinese patent medicine]
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Ze-Qi, Dai, Si-Min, Xu, Xue, Wu, Miao-Miao, Li, Jing, Hu, and Xing, Liao
- Subjects
China ,Nonprescription Drugs ,Medicine, Chinese Traditional ,Decision Support Techniques - Abstract
Multi-criteria decision analysis(MCDA), a comprehensive analysis method that can help decision-makers consider multiple criteria systematically, has been used for clinical comprehensive evaluation of drugs, such as chemicals and Chinese patent medicines. The present study summarized the theoretical basis of MCDA and its application in the clinical comprehensive evaluation of drugs and put forward suggestions. MCDA includes problem identification, structuring problem, model building, and using the model to inform and challenge thinking to develop an action plan. The modeling methods include value measurement models, outranking models, and reference-level models. The value measurement model is the most commonly used method in healthcare. The implementation steps of MCDA consist of defining the decision problem, selecting and structuring criteria, measuring performance, scoring alternatives, weighting criteria, calculating aggregate scores, dealing with uncertainty, and reporting and examination of findings. It is urgent to carry out the clinical comprehensive evaluation of Chinese patent medicine, the important part of traditional Chinese medicine(TCM), to promote its scientization, homogenization, and standardization. It is of great significance to carry out the clinical comprehensive evaluation of Chinese patent medicine with MCDA, which should be demand-oriented, coordinated by many parties, and learn from international experience and successful practice to establish the corresponding technical guidelines, specifications, and evaluation tools, so as to provide technical support for Chinese patent medicine supply and policy formulation.
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- 2022
37. [Rapid health technology assessment of four oral Chinese patent medicines for constipation]
- Author
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Miao-Miao, Li, Hui, Zhao, Ze-Qi, Dai, Xue, Wu, Si-Min, Xu, Xu-Dong, Tang, and Xing, Liao
- Subjects
China ,Technology Assessment, Biomedical ,Meta-Analysis as Topic ,Humans ,Capsules ,Nonprescription Drugs ,Controlled Clinical Trials as Topic ,Constipation ,Drugs, Chinese Herbal ,Randomized Controlled Trials as Topic - Abstract
This study evaluated the safety, efficacy, and cost effectiveness of Biantong Capsules(Tablets), Maren Runchang Pills, Qirong Runchang Oral Liquid, and Qihuang Tongmi Soft Capsules in the treatment of constipation by the rapid health technology assessment(RHTA) to provide evidence for clinical decision and references for rapid evaluation of Chinese patent medicine(CPM). CNKI, Wanfang, VIP, SinoMed, PubMed, EMbase, Web of Science, and Cochrane Library were searched for research articles from database inception to February 2022. Two reviewers conducted literature screening, data extraction, and quality evaluation according to the predetermined standards. Descriptive analysis of the results combined with visual charts was performed. Sixty research articles were included, involving 44 randomized controlled trials(RCTs), 7 clinical controlled trials(CCTs), 4 systematic reviews/Meta-analyses, and 5 economic analysis studies. As revealed by the results, Biantong Capsules(Tablets) could be used for postoperative and senile constipation, in which some studies reported Biantong Capsules(Tablets) were superior to Maren Runchang Pills and Qirong Runchang Oral Liquid. Maren Runchang Pills were mainly used for senile constipation, and the efficacy was similar to that of conventional wes-tern medicine, but the cost was low and the compliance of patients was good. Qirong Runchang Oral Liquid was indicated for disease-derived or drug-induced constipation, chronic constipation, and senile constipation with fewer adverse reactions. Qihuang Tongmi Soft Capsules had good efficacy and safety in the treatment of functional constipation. Overall, compared with western medicine glycerine enema and lactulose, the number of clinical studies of the four CMPs was small, but they targeted constipation patients with different subtypes. In conclusion, the four CMPs have their advantages and characteristics in the treatment of constipation, but they are restric-ted by sparse existing evidence, low quality of evidence, and insufficient economic research. In the future, more high-quality and long-term follow-up studies should be carried out to obtain reliable evidence. Meanwhile, it is called for strengthening the economic evaluation of CMPs to provide evidence for decision-making.
- Published
- 2022
38. Improvement of a MALDI-TOF database for the reliable identification of Candidozyma auris (formally Candida auris) and related species
- Author
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Hui-Hui Zhu, Miao-Miao Liu, Teun Boekhout, and Qi-Ming Wang
- Subjects
Candidozyma auris ,Candida auris ,Candidozyma haemulispecies complex ,MALDI-TOF ,mass spectrometry ,yeast ,Microbiology ,QR1-502 - Abstract
ABSTRACT Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) is a promising technique for the rapid identification microorganisms. The aim of this study was to create a new database for the accurate identification of Candidozyma auris (formerly known as Candida auris) and 11 species of the Candidozyma haemuli species complex, including C. chanthaburiensis, C. duobushaemuli, C. haemuli, C. heveicola, C. khanbhai, C. konsanensis, C. metrosideri, C. ohialehuae, C. pseudohaemuli, C. ruelliae, and C. vulturna. Seventy-one Candidozyma isolates from different national institutions were studied. Thirty-seven strains were used to create a MALDI-TOF (microTyper MS) database using the formic acid extraction method. The validation of this database was performed with 34 other strains of the genus Candidozyma, and the result was compared with the identification results when using DBRs v1.0.0.4 (Tianrui, China). Our library allowed a 100% identification of the evaluated strains with all strains showing log scores of >2.0. Repeatability and reproducibility tests result showed a coefficient of variation of the log score values of less than 5%. The MALDI-TOF MS system can identify C. auris and related species quickly and accurately. This method will play a crucial role in accurately diagnosing infectious agents of the genus Candidozyma in clinical practice.IMPORTANCEImportance Candidozyma auris, also known as Candida auris, has quickly spread across the world, and prompt identification of C. auris from infected individuals is critical. However, a standard identification method is lacking for the identification of C. auris in clinical and public health laboratories. To make matters worse, its biochemical assimilation profile was found to be similar to that of closely related and even no-related species, leading to frequent misidentification. To improve diagnostics of this and closely related species, we created a database of reference mass spectra resulting in the efficient and correct identification of all Candidozyma species by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). Moreover, potential pathogenic species of Candidozyma can be effectively identified by MALDI-TOF MS, and differentiated from non-clinically relevant phylogenetic relatives. Thus, MALDI-TOF MS may help expedite laboratory diagnosis and treatment of C. auris and related species of clinical importance and help the clinician to decide on early treatment.
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- 2025
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39. Risk factors of postoperative adhesive bowel obstruction in children with complicated appendicitis
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Hua-Lei Cui, Wei Feng, Xu-Feng Zhao, Miao-Miao Li, and Xiao-Bing Du
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Male ,medicine.medical_specialty ,Multivariate analysis ,Adolescent ,Tissue Adhesions ,Overweight ,03 medical and health sciences ,Postoperative Complications ,0302 clinical medicine ,Risk Factors ,030225 pediatrics ,ABO blood group system ,parasitic diseases ,Pediatric surgery ,medicine ,Appendectomy ,Humans ,Child ,business.industry ,Area under the curve ,Infant ,General Medicine ,Appendicitis ,medicine.disease ,Confidence interval ,Surgery ,Bowel obstruction ,Child, Preschool ,Pediatrics, Perinatology and Child Health ,Female ,Laparoscopy ,030211 gastroenterology & hepatology ,medicine.symptom ,Complication ,business ,Intestinal Obstruction - Abstract
Postoperative adhesive bowel obstruction (ABO) is a common complication especially in complicated appendicitis. This study aimed to analyze the risk factors for ABO following appendectomy in children with complicated appendicitis, and establish a scoring model for predicting postoperative ABO and treatment option to relieve the obstruction. From December 2014 to January 2020, all files of consecutive patients with complicated appendicitis underwent appendectomy were reviewed. Univariate and multivariate analyses were used to screen out the risk factors of postoperative ABO, and establish a scoring model for predicting postoperative ABO and surgical relief to relieve the obstruction. Of the 780 patients, 87 (11.2%) had ABO following appendectomy, including 27 who underwent surgical relief. Age ≤ 6 years, overweight and obesity, duration of symptoms ≥ 36 h, C-reactive protein ≥ 99 mg/L, duration of operation ≥ 60 min, intraoperative peritoneal lavage, and postoperative flatus time ≥ 20 h were independent risk factors for postoperative ABO. The final scoring model for postoperative ABO included factors above, and exhibited a high degree of discrimination (area under the curve [AUC]: 0.937; 95% confidence interval [CI] 0.913–0.960) corresponding to an optimal cut-off value of 6: 82.8% sensitivity, 92.6% specificity. Furthermore, the scoring model showed a sensitivity of 74.1% and a specificity of 91.7% for patients wo underwent surgical relief to relieve obstruction with the optimal cut-off value of 9. Risk factors for postoperative ABO should be taken seriously in children with complicated appendicitis. The scoring model is a novel but promising method to predict postoperative ABO and provide reference for clinical decision-making to relieve the obstruction.
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- 2021
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40. Utilizing Vinylcyclopropane Reactivity: Palladium‐Catalyzed Asymmetric [5+2] Dipolar Cycloadditions
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Liang-Qiu Lu, Yu Lan, Miao-Miao Li, Qin Xiong, Bao-Le Qu, Yu-Qing Xiao, and Wen-Jing Xiao
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Dipole ,chemistry ,Polymer chemistry ,chemistry.chemical_element ,Reactivity (chemistry) ,General Medicine ,Catalysis ,Palladium - Published
- 2020
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41. Utilizing Vinylcyclopropane Reactivity: Palladium‐Catalyzed Asymmetric [5+2] Dipolar Cycloadditions
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Miao-Miao Li, Qin Xiong, Bao-Le Qu, Yu-Qing Xiao, Yu Lan, Liang-Qiu Lu, and Wen-Jing Xiao
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010405 organic chemistry ,Chemistry ,Enantioselective synthesis ,chemistry.chemical_element ,General Chemistry ,010402 general chemistry ,01 natural sciences ,Chemical synthesis ,Catalysis ,Cycloaddition ,0104 chemical sciences ,Dipole ,Computational chemistry ,Reactivity (chemistry) ,Palladium - Abstract
Vinylcyclopropanes (VCPs) are commonly used in transition-metal-catalyzed cycloadditions, and the utilization of their recently realized reactivities to construct new cyclic architectures is of great significance in modern synthetic chemistry. Herein, a palladium-catalyzed, visible-light-driven, asymmetric [5+2] cycloaddition of VCPs with α-diazoketones is accomplished by switching the reactivity of the Pd-containing dipolar intermediate from an all-carbon 1,3-dipole to an oxo-1,5-dipole. Enantioenriched seven-membered lactones were produced with good reaction efficiencies and selectivities (23 examples, 52-92 % yields with up to 99:1 er and 12.5:1 dr). In addition, computational investigations were performed to rationalize the observed high chemo- and periselectivities.
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- 2020
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42. Palladium‐Catalyzed Asymmetric [8+2] Dipolar Cycloadditions of Vinyl Carbamates and Photogenerated Ketenes
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Qun‐Liang Zhang, Qin Xiong, Miao‐Miao Li, Wei Xiong, Bin Shi, Yu Lan, Liang‐Qiu Lu, and Wen‐Jing Xiao
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General Medicine - Published
- 2020
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43. Palladium‐Catalyzed Asymmetric [8+2] Dipolar Cycloadditions of Vinyl Carbamates and Photogenerated Ketenes
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Yu Lan, Qun-Liang Zhang, Qin Xiong, Miao-Miao Li, Wei Xiong, Bin Shi, Wen-Jing Xiao, and Liang-Qiu Lu
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Enantioselective synthesis ,Ketene ,chemistry.chemical_element ,General Chemistry ,Conjugated system ,Combinatorial chemistry ,Catalysis ,Cycloaddition ,Stereocenter ,chemistry.chemical_compound ,chemistry ,Stereoselectivity ,Palladium - Abstract
Higher-order cycloadditions, particularly [8+2] cycloadditions, are a straightforward and efficient strategy for constructing significant medium-sized architectures. Typically, configuration-restrained conjugated systems are utilized as 8π-components for higher-order concerted cycloadditions. However, for this reason, 10-membered monocyclic skeletons have never been constructed via catalytic asymmetric [8+2] cycloaddition with high peri- and stereoselectivity. Here, we accomplished an enantioselective [8+2] dipolar cycloaddition via the merger of visible-light activation and asymmetric palladium catalysis. This protocol provides a new route to 10-membered monocyclic architectures bearing chiral quaternary stereocenters with high chemo-, peri-, and enantioselectivity. The success of this strategy relied on the facile in situ generation of Pd-containing 1,8-dipoles and their enantioselective trapping by ketene dipolarophiles, which were formed in situ via a photo-Wolff rearrangement.
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- 2020
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44. Amelioratory effects of Astragaloside IV on hepatocarcinogenesis via Nrf2-mediated pSmad3C/3L transformation
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Yong- Fang Gong, Shu Hou, Jia-Cheng Xu, Yan Chen, Le-Le Zhu, Ying-Ying Xu, Yu-Qing Chen, Miao-Miao Li, Li-Li Li, Jing-Jing Yang, and Yan Yang
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Pharmacology ,Complementary and alternative medicine ,Drug Discovery ,Pharmaceutical Science ,Molecular Medicine - Published
- 2023
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45. Development and validation of a risk prediction model for breast cancer-related lymphedema in postoperative patients with breast cancer
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Miao-miao Li, Pei-pei Wu, Wan-min Qiang, Jia-qian Li, Ming-yu Zhu, Xiao-lin Yang, and Ying Wang
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Oncology (nursing) ,General Medicine - Published
- 2023
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46. Immulectin-2 from the ghost moth, Thitarodes xiaojinensis (Lepidoptera: Hepialidae), modulates cellular and humoral responses against fungal infection
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Pei-Pei Wu, Rui-Hao Shu, Xin-Xin Gao, Miao-Miao Li, Ji-Hong Zhang, Huan Zhang, Qi-Lian Qin, Zhen Zou, and Qian Meng
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Lepidoptera ,Mycoses ,Larva ,Immunology ,Cordyceps ,Animals ,Beauveria ,Moths ,Developmental Biology - Abstract
C type-lectins constitute a large family of pattern recognition receptors, playing important roles in insect immune defenses. Thitarodes xiaojinensis larvae showed distinct immune features after Ophiocordyceps sinensis, Cordyceps militaris, or Beauveria bassiana infection. Based on transcriptome and immunoblot analysis, we found that immulectin-2 (IML2) was induced after T. xiaojinensis larvae were infected by C. militaris or B. bassiana but maintained at a low level after larvae injected with O. sinensis or Ringer's buffer. Recombinant IML2 (rIML2) could promote melanization, encapsulation, phagocytosis, and hemocyte aggregation in vitro. RNA interference with IML2 induced a significant reduction in the transcript levels of various antimicrobial peptides. Importantly, we found that the abundance of O. sinensis blastospores coated with rIML2 dramatically decreased in the host hemolymph. Overall, this study demonstrated that T. xiaojinensis IML2 modulates cellular and humoral responses to entomopathogenic fungi, broadening our view of the immune interaction between O. sinensis and its host.
- Published
- 2022
47. Association of the PCSK6 rs1531817(C/A) polymorphism with the prognosis and coronary stenosis in premature myocardial infarction patients: a prospective cohort study
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Li Sun, Jing-xian Wang, Jing Ma, Xu Zhang, Yu-Hang Wang, An-Ran Jing, Miao-Miao Liang, Jing-yu Liu, Yin Liu, and Jing Gao
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Premature myocardial infarction ,Proprotein convertase subtilisins/Kexin 6 ,Single nucleotide polymorphism ,Coronary stenosis ,Major adverse cardiovascular events ,Nutritional diseases. Deficiency diseases ,RC620-627 - Abstract
Abstract Background Proprotein convertase subtilisins/kexin 6 (PCSK6) polymorphisms have been shown to be associated with atherosclerosis progression. This research aimed to evaluate the relationship of PCSK6 rs1531817 polymorphisms with coronary stenosis and the prognosis in premature myocardial infarction (PMI) patients. Methods This prospective cohort analysis consecutively included 605 PMI patients who performed emergency percutaneous coronary intervention (PCI) at Tianjin Chest Hospital sequentially between January 2017 and August 2022, with major adverse cardiovascular events (MACEs) as the outcome. Analyses assessed the relationships among PCSK6 rs1531817 polymorphism, Gensini score (GS), triple vessel disease (TVD), and MACEs. Results 92 (16.8%) patients experienced MACEs with an average follow-up of 25.7 months. Logistic analysis revealed that the PCSK6 rs1531817 CA + AA genotype was an independent protective factor against high GS and TVD. Cox analysis revealed that the PCSK6 rs1531817 CA + AA genotype was an independent protective factor against MACEs. The mediation effect results showed that apolipoprotein A1/apolipoprotein B (ApoA1/ApoB) partially mediated the association between PCSK6 rs1531817 polymorphism and coronary stenosis and that total cholesterol/high-density lipoprotein (TC/HDL) and TVD partially and in parallel mediated the association between the PCSK6 rs1531817 polymorphism and MACEs. Conclusion Patients with the PCSK6 CA + AA genotype have milder coronary stenosis and a better long-term prognosis; according to the mediation model, ApoA1/ApoB and TC/HDL partially mediate. These results may provide a new perspective on clinical therapeutic strategy for anti-atherosclerosis and improved prognosis in PMI patients.
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- 2024
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48. Needs for Improvement of High School Foodservice Dietitians’ Tasks in Chungcheong Area
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Se Ha Han, Miao Miao Li, and Lee, Young Eun
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Nutrition and Dietetics ,Food Science - Published
- 2019
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49. Slow magnetic relaxation in two mononuclear trigonal antiprismatic Co(II) complexes
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Xiaoyan Niu, Jie Zhang, Lingling Gao, Miao-Miao Li, Lijun Zhai, Qiannan Zhao, and Tuoping Hu
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010405 organic chemistry ,Trigonal crystal system ,010402 general chemistry ,01 natural sciences ,Magnetic susceptibility ,0104 chemical sciences ,law.invention ,Inorganic Chemistry ,chemistry.chemical_compound ,Magnetic anisotropy ,symbols.namesake ,Crystallography ,chemistry ,law ,Pyridine ,Materials Chemistry ,symbols ,Magnetic relaxation ,Physical and Theoretical Chemistry ,Electron paramagnetic resonance ,Raman spectroscopy ,Methyl group - Abstract
Two mononuclear trigonal antiprismatic Co(II) complexes, [Co(CHQ)2Py2] (1) and [Co(NHQ)2Py2] (2) (CHQ = deprotonated 2-methyl-8-hydroxyquinoline, NHQ = deprotonated 2-amino-8-hydroxyquinoline), have been synthesized. Magnetic measurements indicate that complexes 1 and 2 exhibit frequency and temperature dependence of out-of-phase magnetic susceptibility under designated dc field, both behaving as field-induced SIMs. The high-field and high-frequency electron paramagnetic resonance (HF-EPR) studies reveal that the easy-plane magnetic anisotropy of both 1 and 2. Fitting the data of 1 gives that the energy barrier is 60.10 K, obviously higher than 56.44 K for 2, because that the amino group on the pyridine from NHQ has stronger electron-donor ability than the methyl group from CHQ. Magnetic study shows the coexistence of multiple relaxation process mechanisms, including the direct, Raman and Orbach processes for 1 and 2.
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- 2019
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50. Clarifying the zeolitic imidazolate framework effect on superior electrochemical properties of hydrogen storage alloys
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Miao Miao Li, Chun Cheng Yang, Yi Tong Zhou, and Chao Jun Cui
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General Chemical Engineering ,Electrochemistry - Published
- 2022
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