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A Novel Poly(3-hexylthiophene) Engineered Interface for Electrochemical Monitoring of Ascorbic Acid During the Occurrence of Glutamate-Induced Brain Cytotoxic Edemas

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Research 2024年第1期2023卷 301-313页

作者： Zexuan Meng yuchan Zhang Lu Yang Shuang Zhao Qiang Zhou Jiajia Chen Jiuxi Sui Jian wang Lizhong Guo Luyue Chang Jialing He Guixue wang Guangchao Zang Institute of Life Science and Laboratory of Tissue and Cell BiologyLab Teaching and Management CenterChongqing Medical UniversityChongqing 400016China Key Laboratory for Biorheological Science and Technology of Ministry of Education State and Local Joint Engineering Laboratory for Vascular ImplantsBioengineering College of Chongqing UniversityChongqing 400030China Jinfeng Laboratory Chongqing 401329China Department of Pathophysiology Chongqing Medical UniversityChongqingChina

Although neuroelectrochemical sensing technology offers unique benefits for neuroscience research,its application is limited by substantial interference in complex brain environments while ensuring biosafety requirements.In this study,we introduced poly(3-hexylthiophene)(P3HT)and nitrogen-doped multiwalled carbon nanotubes(N-MWCNTs)to construct a composite membrane-modified carbon fiber microelectrode(CFME/P3HT-N-MWCNTs)for ascorbic acid(AA)detection.The microelectrode presented good linearity,selectivity,stability,antifouling,and biocompatibility and exhibited great performance for application in neuroelectrochemical sensing.Subsequently,we applied CFME/P3HT-N-MWCNTs to monitor AA release from in vitro nerve cells,ex vivo brain slices,and in vivo living rat brains and determined that glutamate can induce cell edema and AA release.We also found that glutamate activated the N-methyl-d-aspartic acid receptor,which enhanced Na^(+) and Cl^(−) inflow to induce osmotic stress,resulting in cytotoxic edema and ultimately AA release.This study is the first to observe the process of glutamate-induced brain cytotoxic edema with AA release and to reveal the mechanism.Our work can benefit the application of P3HT in in vivo implant microelectrode construction to monitor neurochemicals,understand the molecular basis of nervous system diseases,and discover certain biomarkers of brain diseases.

关键词： release microelectrode Engine

Bacteroides ovatus-mediated CD27^(−)MAIT cell activation is associated with obesity-related T2D progression

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Cellular & Molecular Immunology 2022年第7期19卷 791-804页

作者： Yue Li Yi Yang Jin wang Peihong Cai Mei Li Xixiang Tang Ying Tan Yuchan Wang Fan Zhang Xiaofeng Wen Qiaoxing Liang Yuanpeng Nie Tufeng Chen Xiang Peng Xuemin He Yanhua Zhu Guojun Shi Wai WCheung Lai Wei Yanming Chen Yan Lu Department of Endocrinology&Metabolism Guangdong Provincial Key Laboratory of DiabetologyThe Third Affliated Hospital of Sun Yat-sen UniversityGuangzhou 510630China Department of Clinical Immunology The Third Affliated Hospital of Sun Yat-sen UniversityGuangzhou 510630China VIP Medical Service Center The Third Affliated Hospital of Sun Yat-sen UniversityGuangzhou 510630China State Key Laboratory of Ophthalmology Zhongshan Ophthalmic CenterSun Yat-sen UniversityGuangzhou 510060China Department of Gastrointestinal Surgery The Third Affliated Hospital of Sun Yat-sen UniversityGuangzhou 510630China Department of Rheumatology The Sixth Affliated Hospital of Guangzhou Medical UniversityQingyuan People's HospitalQingyuan 511518China Division of Pediatric Nephrology Rady Children's HospitalUniversity of CaliforniaSan DiegoCA 92093-0831USA

Type 2 diabetes(T2D)is highly associated with obesity.However,the factors that drive the transition from excessive weight gain to glucose metabolism disruption are still uncertain and seem to revolve around systemic immune disorder.Mucosal-associated invariant T(MAIT)cells,which are innate-like T cells that recognize bacterial metabolites,have been reported to be altered in obese people and to lead to metabolic dysfunction during obesity.By studying the immunophenotypes of blood MAIT cells from a cross-sectional cohort of obese participants with/without T2D,we found an elevation in CD27^(-)negative(CD27−)MAIT cells producing a high level of IL-17 under T2D obese conditions,which could be positively correlated with impaired glucose metabolism in obese people.We further explored microbial translocation caused by gut barrier dysfunction in obese people as a triggering factor of MAIT cell abnormalities.Specifically,accumulation of the bacterial strain Bacteroides ovatus in the peripheral blood drove IL-17^(-)producing CD27−MAIT cell expansion and could be associated with T2D risk in obese individuals.Overall,these results suggest that an aberrant gut microbiota–immune axis in obese people may drive or exacerbate T2D.Importantly,CD27−MAIT cell subsets and Bacteroides ovatus could represent targets for novel interventional strategies.Our findings extend current knowledge regarding the clinical relevance of body mass index(BMI)-associated variation in circulating MAIT cells to reveal the role of these cells in obesity-related T2D progression and the underlying cellular mechanisms.

关键词： type 2 diabetes obesity MAIT cells Bacteroides ovatus bacterial translocation

微波联合金属离子对小麦胚芽蛋白功能特性及结构的影响

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食品科学 2024年第5期45卷 217-224页

作者：郭宇姜城红杨玉婵张瑶王东旭郭元新江苏科技大学粮食学院江苏省粮食生物加工工程研究中心江苏镇江212100

以小麦胚芽粉为原料,通过碱溶酸沉法提取小麦胚芽蛋白(wheat germ protein,WGP),采用微波和金属离子联合处理对WGP进行改性,测定改性前后WGP功能特性、结构和分子质量的变化。结果表明,与对照组相比,联合处理改性后的WGP溶解性提高了86.... 详细信息

以小麦胚芽粉为原料,通过碱溶酸沉法提取小麦胚芽蛋白(wheat germ protein,WGP),采用微波和金属离子联合处理对WGP进行改性,测定改性前后WGP功能特性、结构和分子质量的变化。结果表明,与对照组相比,联合处理改性后的WGP溶解性提高了86.61%,持水力、持油力分别提高了22.86%、82.16%,乳化性、乳化稳定性、起泡性分别提高120.90%、15.64%、116.91%,起泡稳定性相对降低。傅里叶变换红外光谱、扫描电子显微镜和十二烷基硫酸钠-聚丙烯酰胺凝胶电泳结果显示,联合处理改性后的WGP分子质量未见明显差异,结构更疏松,二级结构向着无序化方向进行,主要表现在β-转角、无规卷曲增加。联合处理对WGP的功能特性改善效果优于微波和金属离子单一处理。微波和金属离子联合处理使WGP具有良好的功能特性,赋予了WGP被开发成新型功能性食品的潜力。

关键词：小麦胚芽蛋白微波金属离子功能特性结构

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软件工程人才培养智慧化平台设计与应用

信息与电脑 2024年第3期36卷 248-250页

作者：王宇婵张帆苏玉郑州工程技术学院信息工程学院河南郑州450044

为提高软件工程人才培养效率和质量,文章设计了一款软件工程人才培养智慧化平台。采用分层设计方法,结合人工智能算法,开发了包含课程管理、学生学习追踪、互动与反馈、数据分析与报告等功能模块的平台。为验证智慧化平台的有效性和性能... 详细信息

为提高软件工程人才培养效率和质量,文章设计了一款软件工程人才培养智慧化平台。采用分层设计方法,结合人工智能算法,开发了包含课程管理、学生学习追踪、互动与反馈、数据分析与报告等功能模块的平台。为验证智慧化平台的有效性和性能,采用专业的测试软件对该平台和传统平台进行功能测试和性能测试。结果表明,智慧化平台在功能覆盖率、错误发现率、系统吞吐量等多个关键指标上优于传统平台,验证了其在现代教育环境中的应用有效性和性能优势。

关键词：软件工程人才培养数据分析功能模块机器学习算法

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一种基于深度学习的疲劳驾驶检测方法研究

计算机与数字工程 2024年第3期52卷 892-897,930页

作者：王舒磊关沫边玉婵沈阳工业大学信息科学与工程学院沈阳110000 沈阳工业大学软件学院沈阳110000

疲劳驾驶检测对避免车辆事故的发生有着非常重要的意义,对检测方法的实时性和准确率均有较高的要求。为此,提出一种基于深度学习的疲劳驾驶检测方法。首先,使用改进后的目标检测网络YOLOX对驾驶员的面部区域进行定位;然后使用PFLD深度... 详细信息

疲劳驾驶检测对避免车辆事故的发生有着非常重要的意义,对检测方法的实时性和准确率均有较高的要求。为此,提出一种基于深度学习的疲劳驾驶检测方法。首先,使用改进后的目标检测网络YOLOX对驾驶员的面部区域进行定位;然后使用PFLD深度学习模型检测面部关键点,从而计算出眨眼频率、打哈欠频率和点头频率等疲劳特征参数值;最后,通过多特征融合疲劳判定算法判断驾驶员的疲劳状态,从而进行有效的疲劳驾驶预警。大量的实验表明,该疲劳驾驶检测方法在实时性、准确率等方面都取得明显的性能提升。

关键词： YOLOX PFLD 深度学习疲劳驾驶检测

Study on the reaction of 3-methyl-2-butenal and 3-methylbutanal with Cl atoms: kinetics and reaction mechanism

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Journal of Environmental Sciences 2022年第6期34卷 25-33页

作者： Bo Shi Weigang wang Cici Fan yuchan Zhang Zheng Sun Yanli Zeng Maofa Ge College of Chemistry and Material Sciences Hebei Normal UniversityShijiazhuang 050024China State Key Laboratory for Structural Chemistry of Unstable and Stable Species Beijing National Laboratory for Molecular Sciences(BNLMS)Institute of ChemistryChinese Academy of SciencesBeijing 100190China Lanfang Normal University Langfang 065000China National Demonstration Center for Experiment Chemistry Hebei Normal UniversityShijiazhuang 050024China Key Laboratory of Inorganic Nano-material of Hebei Province Shijiazhuang 050024China

The reaction of Cl atoms with two C5aldehydes(3-methyl-2-butenal and 3-methylbutanal)were investigated by proton-transfer-reaction mass spectrum(PTR-MS)using smog chamber at 298±1 K and 760 Torr.A relative rate method was used to determine the rate constants of the title reactions with m-xylene and trans-2-butene as reference compounds:(3.04±0.18)×10^(-10)and(2.07±0.14)×10^(-10)cm^(3)/(molecule·sec)for 3-methyl-2-butenal and 3-methylbutanal,respectively.Additionally,the gas-phase products were also identified by PTR-MS,and the possible reaction mechanisms were proposed basing on the identified products.The detected gas-phase products are similar for two C5aldehydes reactions,mainly including small molecules of aldehydes,ketones and chlorinated aldehyde compounds.The atmospheric lifetimes(τ)calculated for 3-methyl-2-butenal(τ=7.0 hr,marine boundary layer(MBL))and 3-methylbutanal(τ=10.3 hr,MBL)according to the obtained rate constants.The results indicate that Cl atoms at MBL are competitive with OH radicals for the degradation contribution of C5aldehyde compounds.

关键词： Smog chamber Kinetic Reaction mechanism Cl atoms

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区县级医院学科发展竞争力指标体系研究

中国医院 2024年第5期28卷 37-40页

作者：石景芬王宇婵刘志会廖萱罗月刘军四川省医学科学院·四川省人民医院四川省成都市610072 成都市温江区人民医院四川省成都市611135

目的:构建一套科学实用的区县级医院学科发展竞争力评价指标。方法:基于PEST+SWOT分析法探索区县级医院学科发展关键要素及其运行机制,初筛学科发展竞争力指标体系;运用德尔菲法开展两轮专家咨询确定指标体系及权重。结果:该指标体系包... 详细信息

目的:构建一套科学实用的区县级医院学科发展竞争力评价指标。方法:基于PEST+SWOT分析法探索区县级医院学科发展关键要素及其运行机制,初筛学科发展竞争力指标体系;运用德尔菲法开展两轮专家咨询确定指标体系及权重。结果:该指标体系包括一级指标4个维度(医院管理及综合实力、人才队伍建设、科研创新、教育培训)、二级指标16个、三级指标38个。两轮专家咨询积极系数均为100%,各指标评分变异系数CV值均3.8,大多数指标得分4以上。结论:经专家反馈和统计检验,该指标体系具备科学性和实用性。

关键词： PEST+SWOT分析德尔菲法区县级医院学科发展指标体系

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Bacillus tropicus来源β-D-呋喃果糖苷酶基因的克隆与表达及其酶学特性研究

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河南工业大学学报（自然科学版） 2024年第2期45卷 1-10页

作者：王润任彤宋衍银沈艺梅李雨禅刘梦昊李思霆陈洲北京工商大学食品与健康学院北京100048

为获得新β-D-呋喃果糖苷酶资源并探究其酶学性质及在转化糖中的应用潜力,挖掘出Bacillus tropicus来源的β-D-呋喃果糖苷酶基因BtFFase8,成功合成后表达在大肠杆菌宿主中。通过数据库筛选β-D-呋喃果糖苷酶的基因序列,将基因克隆至载体... 详细信息

为获得新β-D-呋喃果糖苷酶资源并探究其酶学性质及在转化糖中的应用潜力,挖掘出Bacillus tropicus来源的β-D-呋喃果糖苷酶基因BtFFase8,成功合成后表达在大肠杆菌宿主中。通过数据库筛选β-D-呋喃果糖苷酶的基因序列,将基因克隆至载体pET-28a(+)中。将获得的重组质粒转化至大肠杆菌BL21,构建重组菌株大肠杆菌BL21/pET28a-BtFFase8。采用亲和层析纯化克隆酶,用SDS-PAGE法分析蛋白分子量,通过葡萄糖试剂盒检测酶水解产物的能力得到酶活力,用福林酚试剂法测定蛋白质含量。克隆酶BtFFase8的分子质量为57.0 kDa,对蔗糖底物的比酶活力为13.4 U/mg;BtFFase8的最适pH和最适温度分别为pH 6.5和45℃,且在pH 5.0~8.0和40℃及以下温度保持酶活力稳定,残余酶活力大于80%;BtFFase8能耐受碱性蛋白酶、酸性蛋白酶和胰蛋白酶的水解,残余酶活力大于70%。BtFFase8的发现及克隆酶优良的酶学功能为其未来应用于食品加工,特别是在转化糖的生产中奠定了良好的理论基础。

关键词： β-D-呋喃果糖苷酶 Bacillus tropicus 异源表达酶学性质转化糖

Free-standing Na_(2)C_(6)O_(6)/MXene composite paper for highperformance organic sodium-ion batteries

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Nano Research 2023年第1期16卷 458-465页

作者： Zhengran wang yuchan Zhang Huiyu Jiang Chuanliang Wei Yongling An Liwen Tan Shenglin Xiong Jinkui Feng Key Laboratory for Liquid-Solid Structural Evolution&Processing of Materials(Ministry of Education) Research Center for Carbon NanomaterialsSchool of Materials Science and EngineeringShandong UniversityJinan 250061China Shenzhen Institute of Shandong University Shenzhen 518057China

Sodium-ion batteries(SIBs)are regarded as the ideal low-cost choice for next-generation large-scale energy storage system.Carbonyl-based organic salt-disodium rhodizonate(Na_(2)C_(6)O_(6))with high theoretical specific capacity(501 mAh·g−1)is considered as a promising cathode material for SIBs.However,the dissolution of active material in electrolyte and low electronic conductivity lead to rapidly capacity decay and poor rate performance.Herein,a simple method is designed to construct free-standing and flexible Ti3C2Tx Na2C6O6/MXene paper via vacuum-assisted filtration and antisolvent approach.The MXene can form an electronic conductive network,adsorb the active materials,and offer additional active sites for Na storage.The binder-free Na_(2)C_(6)O_(6)/MXene paper delivers excellent electrochemical property with a high rate performance of 231 mAh·g−1 at 1,000 mA·g−1 and a high capacity of 215 mAh·g−1 after 100 cycles.This work provides an attractive strategy for designing high-performance organic electrode materials of SIBs.

关键词： sodium-ion batteries Na_(2)C_(6)O_(6) cathode MXene organic battery flexible free-standing