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Facile one-pot emulsion/sol-gel method for preparing wrinkled silica microspheres

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Particuology 2021年第3期19卷 33-42页

作者： Yuning Hu Dongxia Hao Fangling Gong Yuanyuan Gao Xingran yan Guanghui ma State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of ScienceBeijing 100190China University of Chinese Academy of Sciences Beijing 100190China

The present manuscript describes a facile and versatile method for preparing uniform wrinkled silica microspheres with diameters of tens of *** method comprises a one-pot emulsion/sol-gel method using silica precursors of organosilane and *** controlling the sol-to-gel transition of the silica precursors,a series of silica microspheres based on uniform emulsion droplets was synthesized by membrane *** silica microspheres had a variety of surface morphologies ranging from smooth,maze-like wrinkles to polygon-like *** was possible to alter the surface morphologies of the microspheres by controlling the amount of organosilane in the dispersed phase and the amount of ammonia catalyst in the continuous phase of the *** grooves on the wrinkled microspheres were able to trap polymer nanoparticles of matching size,thereby demonstrating the potential usefulness of the microspheres in separation science and drug delivery.

关键词： Wrinkled silica microsphere Membrane emulsification Emulsion/sol-gel method

Expanding the Scope of Multivariate Regression Approaches in Cross-Omics Research

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Engineering 2021年第12期7卷 1725-1731页

作者： Xiaoxi Hu Yue ma Yakun Xu Peiyao Zhao jun Wang CAS Key Laboratory of Pathogenic Microbiology and Immunology Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China Bloomberg School of Public Health Johns Hopkins UniversityBaltimoreMD 21205USA University of Chinese Academy of Sciences Beijing 100049China Department of Biostatistics University of MichiganAnn ArborMI 48109-2029USA

Recent technological advancements and developments have led to a dramatic increase in the amount of high-dimensional data and thus have increased the demand for proper and efficient multivariate regression *** traditional multivariate approaches such as principal component analysis have been used broadly in various research areas,including investment analysis,image identification,and population genetic structure ***,these common approaches have the limitations of ignoring the correlations between responses and a low variable selection ***,in this article,we introduce the reduced rank regression method and its extensions,sparse reduced rank regression and subspace assisted regression with row sparsity,which hold potential to meet the above demands and thus improve the interpretability of regression *** conducted a simulation study to evaluate their performance and compared them with several other variable selection *** different application scenarios,we also provide selection suggestions based on predictive ability and variable selection ***,to demonstrate the practical value of these methods in the field of microbiome research,we applied our chosen method to real population-level microbiome data,the results of which validated our *** method extensions provide valuable guidelines for future omics research,especially with respect to multivariate regression,and could pave the way for novel discoveries in microbiome and related research fields.

关键词： Multivariate regression methods Reduced rank regression Sparsity Dimensionality reduction Variable selection

A Family of Nonnormal Cayley Digraphs

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Acta mathematica Sinica,English Series 2001年第1期17卷 147-152页

作者： yan Quan FENG Dian jun WANG Jing Lin CHEN Department of mathematics Northern JiaoTong University Department of mathematics Tsinghua University Department of mathematics Tangshan Normal College

We call a Cayley digraph Γ=Cay(G, S) normal for G if G_R, the right regular representation of G, is a normal subgroup of the full automorphism group Aut(Γ) of Γ. In this paper we determine the normality of Cayley digraphs of valency 2 on nonabelian groups of order 2p^2 (p odd prime). As a result, a family of nonnormal Cayley digraphs is found.

关键词： Cayley digraph Normal Cayley digraph

Solid-state corrosion of lithium for prelithiation of SiO_(x)-C composite anode with carbon-incorporated lithium phosphorus oxynitride

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Nano Research 2023年第6期16卷 8394-8404页

作者： yan Qiao Siyu yang Ziqiang ma yangyuchen yang Xiang Hong Zhengwen Fu Shanghai Key Laboratory of Molecular Catalysis and Innovative materials Department of ChemistryFudan UniversityShanghai 200433China Nano Science and Technology Institute University of Science and Technology of ChinaSuzhou 215123China Central Research Institute Huawei Technologies Co.Ltd.Shenzhen 518129China

In order to address the issues of low initial Coulombic efficiency of SiO_(x)-C composite anode due to the formation of solid electrolyte interphase,irreversible conversion reaction,and large volume change,the prelithiation method using metal lithium has been employed as one of effective ***,violent side reactions with liquid electrolyte for prelithiation lead to low prelithiation efficiency and induce poor interface between the SiO_(x)-C electrode and liquid ***,a new prelithiation method with so called solid-state corrosion of lithium is *** replacing liquid electrolyte with solid-state electrolyte of carbon-incorporated lithium phosphorus oxynitride(LiCPON),not only various side reactions associated with metal lithium are avoided,but also the perfect interface is achieved from the decomposition products of *** successful implementation of solid-state corrosion prelithiation can be confirmed by changes in optical image,scanning electron microscopy,and X-ray *** with pristine electrode,the initial Coulombic efficiency of the prelithiated electrode using solid electrolyte can be increased by about 10%,reaching 98.6%in half cell and 88.9%in full *** with prelithiated electrode using liquid electrolyte,the prelithiation efficiency of the prelithiated anode with solid-state corrosion can be increased from 25.7%to 82.8%.Solid-state corrosion of lithium is expected to become a useful method for prelithiation of SiO_(x)-C composite electrode with high initial Coulombic efficiency and large prelithiation efficiency.

关键词： carbon-incorporated lithium phosphorus oxynitride SiO_(x)-C composite anode prelithiation efficiency interface

Foodborne Pathogens in Retail Oysters in South China

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Biomedical and Environmental Sciences 2010年第1期23卷 32-36页

作者： yan CHEN XIU-MEI LIU JI-WEN yan XIU-GUI LI LING-LING MEI QUN-FEI ma YI ma National Institute for Nutrition and Food Safety Chinese Center for Disease Control and Prevention Beijing 100021 China Guangdong Provmclal Center for Disease Control and Prevention Guangzhou 510300 Guangdong China Guangxl Regional Center for Disease Control And Prevention Nanning 530028 Guangxi China Zhejiang Provincial Center.for Disease Control and Prevention Hangzhou 310051Zhejiang China Fujian Provincial Center for Disease Control and Prevention Fuzhou 350001 FujianChina Hubei Provincial Center for Disease Control and Prevention Wuhan 430079HubeiChina

Objective To investigate the occurrence of important foodbome pathogens in shellstock Pacific oysters in the food markets in South China. Methods From July 2007 to june 2008, retail oysters were collected in different seasons from South China and analyzed for the prevalence and levels of Listeria monocytogenes, Vibrio vulnificus and Vibrio parahaemolyticus. Results None of L. monocytogenes could be detected in any of the 202 oyster samples tested, while E vulnificus and E parahaemolyticus could be detected in 67 （54.9%） and 109 （89.3%） of the 122 oyster samples analyzed, respectively, with an MPN （most probable number） value greater than or equal to 3. V. wdnificus and Eparahaemolyticus with a more than 102 MPN/g were found in 36 （29.5%） and 59 （48.4%） of the 122 oyster samples, respectively. The tdh and trh genes were detected in 4 （0.3%） and 8 （0.6%） of the 1 349 V. parahaemolyticus isolates, respectively. Of the 122 samples, 4 （3.3%） was positive for either tdh or trh. The levels of E vulnificus and total V. parahaemolyticus in oysters in South China varied in different seasons. Conclusion V. vulnificus and pathogenic V. parahaemolyticus are frequently found in oysters in south China, which may pose a potential threat to public health. Data presented here will be useful for the microbiological risk assessment in oysters in China.

关键词： Listeria monocytogenes Vibrio vulnificus Vibrioparahaemolyticus Oyster Microbiological risk assessment

The analysis of a drug transmission model with family education and public health education

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Infectious Disease Modelling 2018年第1期3卷 74-84页

作者： jun Li Mingju ma School of mathematics and Statistics Xidian UniversityXi'an710071PR China School of Science Xi'an Polytechnic UniversityXi'an710048PR China

In this paper,we formulate a six dimensional drug transmission model to study the effect of family education and public health *** dynamical behaviors of the model are discussed in terms of the basic reproduction number *** constructing Lyapunov functions,we obtain the drug-free equilibrium is globally asymptotically stable if R0≤1 and the drug addiction equilibrium is globally asymptotically stable if R0>*** analyses are performed to seek for effective control measures for drug *** analysis show that both the family and public health education can influence the spread of drug ***,the combination of family and public health education is more effective to reduce the prevalence of *** numerical simulations are given to confirm the obtained theoretical results.

关键词： Drug model Basic reproduction number Public health education Sensitivity Stability

Infrared Radiance Simulation and Application under Cloudy Sky Conditions Based on HIRTM

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Journal of Electronic Science and Technology 2019年第2期17卷 161-170页

作者： Jian-Hua Qu jun-Jie yan mao-Nong Ran Huayun Shinetek Company China Meteorological Administration

An algorithm based on hyperspectral infrared cloudy radiative transfer model (HIRTM) is introduced and a simulation method for infrared image of the generation geostationary meteorological satellite is proposed. Based on the parameters from weather research and forecast (WRF), such as the water content, atmospheric temperature, and humidity profile, the simulation data for the advanced Himawari imager (AHI) infrared radiative (IR) channels of Himawari-8 are obtained. Simulated results based on HIRTM agree well with the observed data. Further, the movement, development, and change of the cloud are well predicated. And the simulation of IR cloud image for the weather forecast has been obtained. This paper provides an improved method for evaluation and improvement of regional numerical model for weather forecast.

关键词： Hyperspectral infrared cloudy radiative transfer model (HIRTM) regional numerical model satellite cloud image

HBP1 inhibits chicken preadipocyte differentiation by activating the STAT3 signaling via directly enhancing JAK2 expression

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Journal of Integrative Agriculture 2022年第6期21卷 1740-1754页

作者： CHEN Hong-yan CHENG Bo-han ma yan-yan ZHANG Qi LENG Li WANG Shou-zhi LI Hui Key Laboratory of Chicken Genetics and Breeding Ministry of Agriculture and Rural AffairsHarbin 150030P.R.China Key Laboratory of Animal Genetics Breeding and ReproductionEducation Department of Heilongjiang ProvinceHarbin 150030P.R.China College of Animal Science and Technology Northeast Agricultural UniversityHarbin 150030P.R.China

Obesity presents a serious threat to human health and broiler *** expansion of adipose tissue is mainly regulated by the differentiation of *** differentiation of preadipocytes is a complex biological process regulated by a variety of transcription factors and signaling *** studies have shown that the transcription factor HMG-box protein 1(HBP1)can regulate the differentiation of mouse 3T3-L1 preadipocytes by activating the Wnt/β-catenin signaling ***,it is unclear whether HBP1 involved in chicken preadipocyte differentiation and which signaling pathways it *** aim of the current study was to explore the biological function and molecular regulatory mechanism of HBP1 in the differentiation of chicken *** expression patterns of chicken HBP1 in abdominal adipose tissue and during preadipocyte differentiation were analyzed by RT-qPCR and Western *** preadipocyte stably overexpressing HBP1 or knockout HBP1 and their control cell line were used to analyze the effect of HBP1 on preadipocyte differentiation by oil red O staining,RT-qPCR and Western *** 45-Pathway Reporter Array was used to screen the signal pathways that HBP1 regulates in the differentiation of chicken *** inhibitor and siRNA for signal transducer and activator of transcription 3(STAT3)were used to analyze the effect of STAT3 on preadipocyte *** preadipocyte stably overexpressing HBP1 was transfected by the siRNA of STAT3 or treated with a chemical inhibitor of STAT3 for the rescue *** results of gene expression analysis showed that the expression of HBP1 was related to abdominal fat deposition and preadipocyte differentiation in *** results of function gain and loss experiments indicated that overexpression/knockout of HBP1 in chicken preadipocytes could inhibit/promote(P<0.05)lipid droplet deposition and the expression of adipogenesis-related ***,HB

关键词： chicken HBP1 preadipocyte differentiation STAT3 signaling pathway

Dealloying-derived nanoporous deficient titanium oxide as high-performance bifunctional sulfur host-catalysis material in lithium-sulfur battery

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Journal of materials Science & Technology 2021年第25期84卷 124-132页

作者： Ning Liu Heng ma Lu Wang yan Zhao Zhumabay Bakenov Xin Wang School of materials Science and Engineering Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control TechnologyHebei University of TechnologyTianjin 300130China Institute of Batteries LLC Department of Chemical and Materials EngineeringNational Laboratory AstanaNazarbayev University53 Kabanbay Batyr AvenueNur-Sultan 010000Kazakhstan South China Academy of Advanced Optoelectronics International Academy of Optoelectronics at ZhaoqingSouth China Normal UniversityGuangzhou 510006China

In this work,we report a facile dealloying strategy to tailor the surface state of nanoporous TiO_(2) towards high-efficiency sulfur host material for lithium-sulfur(Li-S)*** used as a sulfur cathode material,the oxygen-deficient TiO_(2)-xexhibits enhanced lithium polysulfides(Li PS)adsorption and conversion kinetics that effectively tackle the shuttle effect in lithium-sulfur *** excellent ability of the oxygen vacancy sites on TiO_(2)-xsurface to trap Li PS is proved by experimental observations and density functional theory(DFT)***,it also promotes conversion kinetics of lithium polysulfides,as verified by the asymmetric cell ***,compared with the S/TiO_(2) cathode,the oxygen-deficient S/TiO_(2)-xelectrode exhibits preeminent rate and cycling performance in lithium-sulfur batteries:it delivers an ultra-low capacity decay of 0.039%per cycle after 1000 cycles at 1 *** the surface state of metal oxides by dealloying method offers a new facile strategy to design efficient sulfur cathode materials for lithium-sulfur batteries.

关键词： Li-S battery Oxygen defects TiO_(2)-x Dealloying Cathode