检索结果-南通市图书馆

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

聚乳酸异形纤维熔融纺丝及性能研究

浙江纺织服装职业技术学院学报 2024年第3期23卷 9-12页

作者：向奇志张凯文林艳雯万一萱江苏城市职业学院环境生态学院江苏南京210048

以聚乳酸(PLA)切片为原料,采用异形喷丝板,通过熔融纺丝、拉伸两步法制得PLA异形截面纤维。通过对PLA切片的DSC热分析确定纤维纺丝成形温度,并用显微镜分析了纤维的截面形态,研究了不同拉伸倍数下PLA纤维性能。结果表明,PLA纤维为类十... 详细信息

以聚乳酸(PLA)切片为原料,采用异形喷丝板,通过熔融纺丝、拉伸两步法制得PLA异形截面纤维。通过对PLA切片的DSC热分析确定纤维纺丝成形温度,并用显微镜分析了纤维的截面形态,研究了不同拉伸倍数下PLA纤维性能。结果表明,PLA纤维为类十字形异形截面纤维,相对径向异形度为37%,纤维表面平滑,且有明显的棱状凸起。拉伸倍数越大,断裂强度和取向因子都增大,而断裂伸长率下降。

关键词：聚乳酸熔融纺丝异形纤维截面形态机械性能

Optical edge-to-screw singularity state conversions

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2024年第8期12卷 1689-1695页

作者： HAOlin lin JUNHUI JIA GUOHUA LIU yanwen HU ZHEN LI ZHENQIANG CHEN SHENHE FU Department of Optoelectronic Engineering Jinan UniversityGuangzhou 510632China Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Guangzhou 510632China Guangdong Provincial Engineering Research Center of Crystal and Laser Technology Guangzhou 510632China

Optical singularity states,which significantly affect propagation properties of light in free space or optical medium,can be geometrically classified into screw and edge *** different types of singularity states do not exhibit direct connection,being decoupled from each other in the absence of external *** we demonstrate a novel optical process in which a higher-order edge singularity state initially nested in the propagating Gaussian light field gradually involves into a screw singularity with a new-born topological charge determined by order of the edge *** considered edge state comprises an equal superposition of oppositely charged vortex and antivortex *** theoretically and experimentally realize this edge-to-screw conversion process by introducing intrinsic vortex–antivortex *** also present a geometrical representation for mapping this dynamical process,based on the higher-order orbital Poincaré*** this framework,the edge-to-screw conversion is explained by a mapping of state evolution from the equator to the north or south pole of the Poincaré*** demonstration provides a novel approach for manipulating singularity state by the intrinsic vortex–antivortex *** presented phenomenon can be also generalized to other wave systems such as matter wave,water wave,and acoustic wave.

关键词： interaction Poincaré wave

在线全文

学校读者我要写书评

暂无评论

傅里叶红外光谱研究血清白蛋白构象

光谱学与光谱分析 1999年第5期19卷 704-706页

作者：童义平李伟林燕文韩山师范学院化生系潮州521041

用傅里叶红外光谱法研究了ＢＳＡ（ｂｏｖｉｎｅｓｅｒｕｍａｌｂｕｍｉｎ，牛血清白蛋白）及其水溶液的红外光谱。通过对其酰胺Ｉ带傅里叶自转积谱分析，为其及部分水溶液中的二级结构构象进行了指认。结果表明，ＢＳＡ水溶液... 详细信息

用傅里叶红外光谱法研究了ＢＳＡ（ｂｏｖｉｎｅｓｅｒｕｍａｌｂｕｍｉｎ，牛血清白蛋白）及其水溶液的红外光谱。通过对其酰胺Ｉ带傅里叶自转积谱分析，为其及部分水溶液中的二级结构构象进行了指认。结果表明，ＢＳＡ水溶液状态与固态时的二级结构是不同的。随着溶液浓度的降低（３．２４１×１０－１～４．０３２×１０－２ｇ·ｍＬ－１），酰胺Ｉ带二级结构峰存在明显的位移现象，即１６０９．８６ｃｍ－１位移到１６０８．２４ｃｍ－１，１６３３．８５位移到１６３８．３６ｃｍ－１，１６５３．６９ｃｍ－１位移到１６５６．１０ｃｍ－１，１６８１．１６ｃｍ－１位移到１６７４．８７ｃｍ－１，１６９４．８８ｃｍ－１位移到１６９０．７８ｃｍ－１，而１６２１．５０ｃｍ－１附近的子峰位移现象不明显。

关键词： FTIR BSA 血清白蛋白二级结构构象自转积

在线全文

学校读者我要写书评

暂无评论

具香浓当归味乳酸菌发酵型泡菜最佳工艺研究

食品工业科技 2006年第3期27卷 153-155页

作者：林燕文韩山师范学院生物系广东潮州521041

以包心芥菜和胡萝卜为原料,两者比为3∶2,添加当归制得泡菜,采用正交实验,得出最佳工艺条件为:当归量3%,盐浓度4%,糖浓度2%,接种量3%,发酵温度30℃,发酵时间4d。根据此条件可开发出集当归和泡菜营养保健价值于一身的,且色、香、味俱佳... 详细信息

以包心芥菜和胡萝卜为原料,两者比为3∶2,添加当归制得泡菜,采用正交实验,得出最佳工艺条件为:当归量3%,盐浓度4%,糖浓度2%,接种量3%,发酵温度30℃,发酵时间4d。根据此条件可开发出集当归和泡菜营养保健价值于一身的,且色、香、味俱佳的新型药膳保健食品。

关键词：当归泡菜乳酸菌发酵药膳保健食品

Hydrogen diffusion in C′_(1) phase clathrate hydrate

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2023年第6期32卷 52-59页

作者：宋姿璇周子岳林演文石桥郝勇超付越群张志森吴建洋 Department of Physics Research Institute for Biomimetics and Soft MatterJiujiang Research Institute and Fujian Provincial Key Laboratory for Soft Functional Materials ResearchXiamen UniversityXiamen 361005China PoreLab the Njord CentreDepartment of PhysicsUniversity of OsloOslo 0313Norway NTNU Nanomechanical Laboratory Norwegian University of Science and Technology(NTNU)Trondheim 7491Norway

Recently,a new phase C'_(1) H_(2) hydrate was experimentally *** this work,the diffusive behaviors of H_(2) in C'_(1)phase clathrate hydrate are explored using classic molecular dynamics(MD)*** reveals that the cage occupancy by H_(2) molecule negligibly influences the C'_(1) phase clathrate structure but greatly dictates the diffusion coefficient of H_(2)*** to the small cage size and small windows connecting the neighboring cages in C'_(1) phase clathrate,nonoccupancy of the neighboring cages is demanded to enable the diffusion of H_(2) molecule that is primarily dominated by hopping ***,the analysis of diffusive free energy landscape reveals lower energy barrier of H_(2) molecule in C'_(1) phase clathrate hydrate than that of other gases in conventional clathrate hydrates,and that H_(2) molecule travels through the windows between neighboring cages with preferential molecular *** study provides critical physical insights into the diffusion behaviors of H_(2) in the C'_(1) phase clathrate hydrate,and implies that the C'_(1) clathrate hydrate is a promising solid structure for the next-generation H_(2) storage.

关键词： clathrate hydrate hydrogen storage diffusion molecular dynamics

在线全文

学校读者我要写书评

暂无评论

程溪菠萝无公害栽培管理技术

福建热作科技 2010年第3期35卷 34-35页

作者：林炎文福建省龙海市程溪镇农业技术推广站龙海363112

总结程溪菠萝无公害栽培管理技术,对于适宜菠萝发展的地区和农民提供技术参考和生产帮助。

关键词：菠萝生产无公害认证栽培管理技术

六西格玛技术在家电产品项目中的创新性应用研究

在线全文

学校读者我要写书评

暂无评论

家电科技 2015年第7期 74-77页

作者：林妍雯珠海格力电器股份有限公司广东珠海519070

六西格玛技术作为全面质量管理的一种继承性新发展,在对企业产品和服务质量的持续改进中取得了卓越的成效。现在,六西格玛技术已经从一种过程改进的方法演变成为一种提升企业竞争力和实现组织变革的战略举措。在产品研发项目管理中引入... 详细信息

六西格玛技术作为全面质量管理的一种继承性新发展,在对企业产品和服务质量的持续改进中取得了卓越的成效。现在,六西格玛技术已经从一种过程改进的方法演变成为一种提升企业竞争力和实现组织变革的战略举措。在产品研发项目管理中引入六西格玛管理技术,是项目管理的一次创新。本文在研讨六西格玛管理技术本质及涵义的基础上,通过探寻六西格玛管理的精髓与项目管理的契合之处,分析了六西格玛管理技术引入项目管理的可行性,并进行了实践运用的初步尝试。

关键词：六西格玛质量管理项目管理

Double-blinded,randomized clinical trial of Gegen Qinlian decoction pinpoints Faecalibacterium as key gut bacteria in alleviating hyperglycemia

在线全文

学校读者我要写书评

暂无评论

Precision Clinical Medicine 2024年第1期7卷 21-33页

作者： Zezheng Gao Wenhui Zhang Lisha He Han Wang Yufei Li Xiaotian Jiang Sha DI Xinmiao Wang Xuan Zhang lin Han yanwen Liu Chengjuan Gu Mengyi Wu Xinhui He Lei Cheng Jun Wang Xiaolin Tong linhua Zhao Institute of Metabolic Diseases Guang'anmen HospitalChina Academy of Chinese Medical SciencesBeijing 100053China Department of Endocrinology Guang anmen HospitalChina Academy of Chinese Medical SciencesBeijing 100053China CAS Key Laboratory of Pathogenic Microbiology and Immunology Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Chengdu University of Traditional Chinese Medicine Chengdu 611137China School of Chinese Materia Medica Beijing University of Chinese MedicineBeijing 100029China Centre for Evidence-Based Chinese Medicine Beijing University of Chinese MedicineBeijing 100029China Department of Endocrinology Affiliated Hospital of Changchun University of Chinese MedicineChangchun 13000oChina Biologicals Science and Technology Institute Baotou Teacher's CollegeBaotou 014030China Department of Endocrinology Zhengzhou T.C.M.HospitalZhengzhou 450007China Shenzhen Hospital Guangzhou University of Chinese Medicine(Futian)Shenzhen 518000China Department of Cardiology Guangdong Provincial Hospital of Chinese MedicineGuangzhou 510120China Department of Cardiology Yunnan Provincial Hospital of Traditional Chinese MedicineKunming 650000China Key Laboratory of Development and Application of Rural Renewable Energy Biogas Institute of Ministry of Agriculture and Rural AffairsChengdu 610041China

Background:Accumulating evidence suggests that metabolic disorders,including type 2 diabetes mellitus(T2DM),can be treated with traditional Chinese medicine formulas,such as the Gegen Qinlian decoction(GQD).This study elucidates the mechanisms by which gut microbes mediate the anti-diabetic effects of ***:We conducted a double-blind randomized clinical trial involving 120 untreated participants with *** the 12-week intervention,anthropometric measurements and diabetic traits were recorded every 4 *** microbiota and serum metabolites were measured before and after the intervention using 16S rDNA sequencing,liquid chromatography-mass spectrometry,and Bio-Plex ***:Anti-diabetic effects were observed in the GQD group in the human ***,glycated hemoglobin,fasting plasma glucose,and two-hour postprandial blood glucose levels were significantly lower in the GQD group than in the placebo ***,Faecalibacterium was significantly enriched in the GQD group,and the short-chain fatty acid levels were higher and the serum inflammation-associated marker levels were lower in the GQD group compared to the placebo ***,Faecalibacterium abundance negatively correlated with the levels of serum hemoglobin,fasting plasma glucose,and pro-inflammatory ***,the diabetes-alleviating effect of Faecalibacterium was confirmed by oral administration of Faecalibacterium prausnitzi(DSMZ 17677)in ***:GQD improved type 2 diabetes primarily by modulating the abundance of Faecalibacterium in the gut microbiota,alleviating metabolic disorders and the inflammatory state.

关键词： double-blinded randomized controlled trial type 2 diabetes mellitus Gegen Qinlian decoction Faecalibacterium metabolic disorders inflammation

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

羟基磷灰石生物功能陶瓷的溶解动力学研究

中国陶瓷工业 2005年第6期12卷 8-10,4页

作者：童义平林燕文韩山师范学院化学系潮州521041 韩山师范学院生物系潮州521041

本文研究了醋酸铵缓冲溶液中(pH=7．4)羟基磷灰石的溶解行为,反应温度分别控制在25℃、37．5℃和50℃。用钙离子选择电极测定溶解过程中的钙离子浓度的变化,溶解过程中的钙离子浓度和反应时间的关系能成功地进行Stumm方程拟合。

关键词：羟基磷灰石溶解动力学反应速率反应级数