检索结果-南通市图书馆

Edible prodelphinidins that improve postprandial hyperglycemia were first discovered in Chinese bayberry(Myrica rubra Sieb. et Zucc.) fruits

引用

Food Science and Human Wellness 2024年

作者： Yi Wang Laiming Zhang Jiaxiong Wu chengxiao Yu Xingqian Ye Haibo Pan shiguo chen Ningbo Research Institute Zhejiang University College of Biosystems Engineering and Food Science Zhejiang Key Laboratory for Agro-Food Processing Integrated Research Base of Southern Fruit and Vegetable Preservation Technology Zhejiang International Scientific and Technological Cooperation Base of Health Food Manufacturing and Quality Control Zhejiang University Zhejiang University Zhongyuan Institute Innovation Center of Yangtze River Delta Zhejiang University

Plant polyphenols are potential substitutes for clinical α-glucosidase inhibitors. Our previous studies indicated that prodelphinidins from Chinese bayberry leaves (BLPs) have stronger α-glucosidase inhibitory activity than other common polyphenols， but they have no safe history of consumption. There is a reasonable prospect that prodelphinidins from Chinese bayberry fruits (BFPs) can improve postprandial hyperglycemia， though known active components are only myricetin and cyanidin-3-O-glucoside. Hence， the aim of this study was to analyze structure and hypoglycemic effect of BFPs of “Biqi” (BQPs) and “Dongkui” (DKPs) cultivars， and compare their difference with BLPs. The contents of BQPs and DKPs were (221.73±0.60) and (136.82±4.33) mg EC equivalents/g dry weight， respectively. The most subunits were EGCG along with a small amount of EGC， ECG and EC connected by B-type linkages and a small portion of A-type linkages with mean polymerization degree of 4.25 and 4.08， respectively. Importantly， BQPs and DKPs were α-glucosidase inhibitors with IC50of 11.91 and 9.47 μg/mL respectively， which were significantly stronger than BLPs. DKPs could also improve postprandial hyperglycemia of normal mice and high fat diet-induced type Ⅱ diabetic mice. Therefore， edible prodelphinidins， which have stronger hypoglycemic effect than BLPs， were first found in Chinese bayberry fruits.

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Non‑Leaching,Rapid Bactericidal and Biocompatible Polyester Fabrics Finished with Benzophenone Terminated N‑halamine

引用

Advanced Fiber Materials 2022年第1期4卷 119-128页

作者： Shu Wang JianNa Li Yihong Cao JingWei Gu YuanFeng Wang shiguo chen Nanshan District Key Lab for Biopolymers and Safety Evaluation Shenzhen Key Laboratory of Polymer Science and TechnologyGuangdong Research Center for Interfacial Engineering of Functional MaterialsCollege of Materials Science and EngineeringShenzhen UniversityShenzhen 518060People’s Republic of China Department of Pathogen Biology School of Basic Medical SciencesShenzhen University Health Sciences CenterShenzhen 518060People’s Republic of China

Pathogenic bacteria can proliferate rapidly on porous fabrics to form bacterial plaques/bioflms,resulting in potential sources of cross-transmissions of diseases and increasing cross-infection in public environments.Many works on antibacterial modifcation of cotton fabrics have been reported,while very few works were reported to endow poly(ethylene terephthalate)(PET)fabrics with non-leaching antibacterial function without compromising their innate physicochemical properties though PET is the most widely used fabric.Therefore,it is urgent to impart the PET fabrics with non-leaching antibacterial activity.Herein,a novel N-halamine compound,1-chloro-3-benzophenone-5,5-dimethylhydantoin(Cl-BPDMH),was developed to be covalently bonded onto PET fabrics,rendering non-leaching antibacterial activity while negligible cytotoxicity based on contact-killing principle.Bacterial was easily adhered to Cl-BPDMH fnished PET fabrics,and then it was inactivated quickly within 10 s.Furthermore,the breaking strength,breaking elongation,tearing strength,water vapor permeability,air permeability and whiteness of Cl-BPDMH fnished PET fabrics were improved obviously compared to raw PET fabrics.Hence,this work developed a facile approach to fabricate multifunctional synthetic textiles to render outstanding and rapid bactericidal activity without compromising their physicochemical properties and biocompatibility.

关键词： Poly(ethylene terephthalate) Fabric Bactericidal N-halamine Photochemical reaction

来源：

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

数字技术赋能当代戏曲电影创作的内在逻辑与美学旨归

引用

当代电影 2024年第6期 168-176页

作者：陈仕国深圳大学艺术学部戏剧影视学院

戏曲电影由于兼具戏曲与电影双重属性,不断引发学界对其从属戏曲还是电影的争论。然而,随着数字技术的介入,戏曲电影的美学发生了根本性的变化,不仅推动了故事环境与舞台环境兼容互促,而且有助于镜头语言与表演语言耦合交融,甚至推动了... 详细信息

戏曲电影由于兼具戏曲与电影双重属性,不断引发学界对其从属戏曲还是电影的争论。然而,随着数字技术的介入,戏曲电影的美学发生了根本性的变化,不仅推动了故事环境与舞台环境兼容互促,而且有助于镜头语言与表演语言耦合交融,甚至推动了虚拟影像与逼真造型交互并置,逐渐消解了戏曲本位与电影本位之间由来已久的矛盾,形成了新的美学旨归,为当代戏曲电影创作提供了某种可能性路径。

关键词：数字技术戏曲电影内在逻辑美学旨归

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Identification of carbohydrate in Polygonatum sibiricum:fructo-oligosaccharide was a major component

引用

Food Quality and Safety 2023年第3期7卷 439-446页

作者： Jiabei Xia Cenrong Zhang Kai Zhu Xingyu Mei Huan cheng shiguo chen Xingqian Ye Jianle chen Ningbo Innovation Center Zhejiang UniversityNingboChina College of Biosystems Engineering and Food Science National–Local Joint Engineering Laboratory of Intelligent Food Technology and EquipmentZhejiang Key Laboratory for Agri-Food ProcessingFuli Institute of Food ScienceZhejiang Engineering Laboratory of Food Technology and EquipmentZhejiang UniversityHangzhouChina Zhejiang University Zhongyuan Institute ZhengzhouChina School of Biological and Chemical Engineering NingboTech UniversityNingboChina

Polygonatum sibiricum,famous for its physiological activities,is a popular Chinese food and a traditional Chinese herb containing many carbohydrates as the main component.However,except for most reported polysaccharides,other detailed compositions of carbohydrates are still not clear.To verify the controversial existence of starch and investigate other components,especially oligosaccharides,we used iodine–potassium iodide colorimetric detection and enzymatic hydrolysis to determine starch.Then,oligosaccharides were analyzed by thin-layer chromatography,gel permeation chromatography,high-performance anion exchange chromatography with pulsed amperometric detection,and hydrophilic interaction chromatography–electrospray tandem mass spectrometry.The results showed that the rhizome of P.sibiricum lacked starch,and fructooligosaccharides were the main component,accounting for approximately 28.95%.Oligosaccharides with degrees of polymerization above 10 were the most abundant components.This study clearly illustrated the unknown carbohydrate components of the Polygonatum rhizome,promoting its functional value with new evidence.

关键词： Polygonatum sibiricum starch determination fructo-oligosaccharides HPAEC-PAD HILIC-ESI-MS/MS

来源：

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

Optimization of high-pressure processing-assisted extraction of pectic polysaccharides from three berries

引用

Food Quality and Safety 2023年第1期7卷 1-12页

作者： Xinxin Hu chengxiao Yu Shokouh Ahmadi Yuying Wang Xingqian Ye Zhiqiang Hou shiguo chen College of Biosystems Engineering and Food Science National-Local Joint Engineering Laboratory of Intelligent Food Technology and EquipmentZhejiang Key Laboratory for Agro-Food ProcessingZhejiang Engineering Laboratory of Food Technology and EquipmentZhejiang UniversityHangzhouChina Zhejiang University Zhongyuan Institute ZhengzhouChina Shandong(Linyi)Institute of Modern Agriculture Zhejiang UniversityLinyiChina Fuli Institute of Food Science Zhejiang UniversityHangzhouChina Ningbo Research Institute Zhejiang UniversityHangzhouChina

Background and objectives:High-pressure processing(HPP)is a promising assistive method to extract pectic polysaccharides with high rhamnogalacturonan I(RG-I)domain and berries are sources of such pectic polysaccharides.This study extracts pectic polysaccharides from goji berry,raspberry,and cranberry,examines how HPP influences the pectic polysaccharide structure of three berries,and provides a basis for the extraction and modification of pectic polysaccharides with specific structure and bioactivity.Materials and methods:An orthogonal test was performed to optimize the HPP-assisted alkali method to extract the high yield and high RG-I content pectic polysaccharides from three berries.Structural information of pectic polysaccharides extracted by the HPP method and conventional methods were compared from the perspectives of monosaccharide composition,molecular weight,Fourier transform infrared spectroscopy,andnuclearmagneticresonancespectroscopy.Results:For raspberry,the optimal conditions consisted of a pressure of 50o MPa,a pH of 13,and a pressure-holding time of 12 min,while the optimal conditions for goji berry and cranberry were both 40o MPa,pH 13,and 15 min.Under the optimal conditions,the yields for goji berry,raspberry,and cranberry were 10.49%,16.63%,and 17.52%,respectively,and RG-l contents were 81.85%,83.30%,and 63.22%,respectively.HPP showed an effect to degrade homogalacturonan backbones and side chains and increase the RG-I content to some extent.Conclusion:HPP-assisted alkali method was revealed to be an efficient method to extract high RG-I content pectic polysaccharides,especially for cranberry,and was a potential method to modify pectic polysaccharide structure in a certain way.

关键词： Pectic polysaccharide High-pressure processing Rhamnogalacturonan-I Structural characteristics

来源：

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

Monodisperse micro-spherical Sr_(2-z)Mg_(1+y)Y_(z)Al_(22-x)O_(36):xMn^(4+)red phosphors

引用

Journal of Rare Earths 2022年第4期40卷 526-533,I0001页

作者： Jiannan Jia Mengting He Jun Wan Yuting Zhang Hai Guo Xianping Fan Xusheng Qiao shiguo chen Department of Physics Zhejiang Normal UniversityJinhua 321004China State Key Laboratory of Silicon Materials&School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China Shenzhen Key Laboratory of Polymer Science and Technology College of Materials Science and EngineeringShenzhen UniversityShenzhen 518055China

With narrow red photoluminescence (PL) bands, tetravalent Mn^(4+) doped phosphors show promising prospect in commercial application to effectively expand color gamut of phosphor converted LED displays. Here, we report a type of Sr_(2-z)Mg_(1+y)Y_(z)Al_(22-x)O_(36):xMn^(4+) phosphors with regular cage-like micro-spherical morphologies. The micron size spherical precursors were synthesized with a propylene oxide (PO) driven fast sol–gel method. The cage -like spherical morphology is beneficial to efficiently trapping much incident light to enhance the PL of the phosphors. Being calcined at 1300 ℃, Sr_(2)MgAl_(21.978)O_(36):0.022Mn^(4+) only exhibits the internal quantum efficiency (IQE) of 24.91%. With the Mg^(2+)-Mn^(4+) codoping and Y^(3+)/Sr^(2+) substituting strategies, to fulfill charge balance and produce John-Teller distortion, IQE of Sr_(2-z)Mg_(1+y)Y_(z)Al_(22-x)O_(36):xMn^(4+) can be further improved up to 36.45%. The CIE color coordinates of Sr_(2-z)Mg_(1+y)Y_(z)Al_(22-x)O_(36):xMn^(4+) under near ultraviolet excitation can be stably fixed to (0.723, 0.227) at deep red region. It thus finds a potential application as pc-LED display with much broader color gamut than that of the NTSC standard. Therefore, Sr_(2-z)Mg_(1+y)Y_(z)Al_(22-x)O_(36):xMn^(4+) micron size spheres can be employed as promising red phosphors for high performance LED displays.

关键词： Mn^(4+) Sr_(2-z)Mg_(1+y)Y_(z)Al_(22-x)O_(36) LED phosphor Cage-like micro-sphere Luminescence Rare earths

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A rapid method for extraction,purification and structure analysis of chondroitin sulfate from six marine tissues

引用

Food Quality and Safety 2023年第1期7卷 20-29页

作者： Yuying Wang Shokouh Ahmadi chengxiao Yu Laiming Zhang Xinxin Hu Xingqian Ye shiguo chen College of Biosystems Engineering and Food Science National-Local Joint Engineering Laboratory of Intelligent Food Technology and EquipmentZhejiang Key Laboratory for Agro-Food ProcessingZhejiang Engineering Laboratory of Food Technology and EquipmentZhejiang UniversityHangzhouChina Zhejiang University Zhongyuan Institute ZhengzhouChina Shandong(Linyi)Institute of Modern Agriculture Zhejiang UniversityLinliChina Fuli Institute of Food Science Zhejiang UniversityHangzhouChina Ningbo Research Institute Zhejiang UniversityHangzhouChina

This study was designed to establish a strategy for the extraction,purification,and structure analysis of chondroitin sulfate(cs)in milligram amounts.Crude acidic polysaccharides were extracted from six kinds of marine animals by enzymatic hydrolysis and hexadecylpyridinium chloride precipitation and purified by Q Sepharose Fast Flow strong anion exchange column.The purification of each crude polysaccharide was completed within 1 h.The structure of the polysaccharides,i.***.their chemical characterization,functional group,molecular weight and monosaccharide composition,were analyzed by colorimetry,nuclear magnetic resonace and high-performance liquid chromatogrpahy,respectively.All polysaccharides were identified as Cs.The oligosaccharide profile produced by enzyme hydrolysis of polysaccharides was determined by strong anion-exchange high-performance liquid chromatorgraphy.This method can be widely applied to the extraction and characterization of chondroitin sulfate from unknown raw materials,screening high-quality sources of functional polysaccharides,and laying a good foundation for thefollowing studyof the structure-function relationshipof polysaccharides.

关键词： Chondroitin sulfate marinepolysaccharide disaccharide analysis

来源：

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

Chemical diversity of scleractinian corals revealed by untargeted metabolomics and molecular networking

引用

Acta Oceanologica Sinica 2023年第11期42卷 127-135页

作者： Jiying Pei Yuxia Zhou shiguo chen Kefu Yu Zhenjun Qin Ruijie Zhang Yitong Wang Coral Reef Research Center of China Guangxi Laboratory on the Study of Coral Reefs in the South China SeaSchool of Marine SciencesGuangxi UniversityNanning 530000China Southern Marine Science and Engineering Guangdong Laboratory Zhuhai 519080China

The chemical diversity of scleractinian corals is closely related to their physiological,ecological,and evolutionary status,and can be influenced by both genetic background and environmental variables.To investigate intraspecific variation in the metabolites of these corals,the metabolomes of four species(Pocillopora meandrina,Seriatopora hystrix,Acropora formosa,and Fungia fungites)from the South China Sea were analyzed using untargeted mass spectrometry-based metabolomics.The results showed that a variety of metabolites,including amino acids,peptides,lipids,and other small molecules,were differentially distributed among the four species,leading to their significant separation in principal component analysis and hierarchical clustering plots.The higher content of storage lipids in branching corals(P.meandrina,S.hystrix,and A.formosa)compared to the solitary coral(F.fungites)may be due to the high densities of zooxanthellae in their tissues.The high content of aromatic amino acids in P.meandrina may help the coral protect against ultraviolet damage and promote growth in shallow seawater,while nitrogen-rich compounds may enable S.hystrix to survive in various challenging environments.The metabolites enriched in F.fungites,including amino acids,dipeptides,phospholipids,and other small molecules,may be related to the composition of the coral's mucus and its life-history,such as its ability to move freely and live solitarily.Studying the chemical diversity of scleractinian corals not only provides insight into their environmental adaptation,but also holds potential for the chemotaxonomy of corals and the discovery of novel bioactive natural products.

关键词： scleractinian coral chemical diversity metabolomics molecular networking environmental adaptation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

以身体为媒介:中华传统艺术当代传承的关键路径

引用

民族艺术 2024年第3期 105-114页

作者：陈仕国王廷信深圳大学中华传统艺术数字化研究中心中国传媒大学艺术研究院

在传播学视阈下,身体素来被视为一个显性的概念。无论从历时层面,还是从共时层面,中华传统艺术的传承活动始终基于“身体”这个媒介予以延续与保存。从以农耕文化为主的古代社会,到倚重信息和崇尚科技的当代社会,媒介经历了从最初依托身... 详细信息

在传播学视阈下,身体素来被视为一个显性的概念。无论从历时层面,还是从共时层面,中华传统艺术的传承活动始终基于“身体”这个媒介予以延续与保存。从以农耕文化为主的古代社会,到倚重信息和崇尚科技的当代社会,媒介经历了从最初依托身体,到分离身体,再到融合身体三个基本过程,表明了无论媒介技术如何更迭发展,人的身体对中华传统艺术传承仍是最具说服力的媒介。中华传统艺术在传承的过程中,媒介技术虽影响了传统艺术的传承成效,但身体的“在场性”始终无法被逾越,并始终与媒介叠合,成为传承的关键路径。当身体衍化成技术化、智能化、虚拟化的媒介时,这种媒介亦不过是身体的某种延伸。因此,媒介技术所形成的智能身体,使身体与媒介得以交互,成为中华传统艺术当代传承可供选择的路径。

关键词：中华传统艺术当代传承身体媒介关键路径

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Progress and prospects in chitosan derivatives:Modification strategies and medical applications

引用

Journal of Materials Science & Technology 2021年第30期89卷 209-224页

作者： Sheng Ding Yuanfeng Wang Jianna Li shiguo chen Nanshan District Key Lab for Biopolymers and Safety Evaluation Shenzhen Key Laboratory of Polymer Science and TechnologyGuangdong Research Center for Interfacial Engineering of Functional MaterialsCollege of Materials Science and EngineeringShenzhen UniversityShenzhen518055China Health Science Center School of Basic Medical Sciences Shenzhen UniversityShenzhen518055China

Chitosan(CS)is the only natural alkaline polysaccharide originated from deacetylation of chitin that is the main component of shell from marine organisms.It has great potential medical application due to its broad-spectrum antimicrobial activity and good water solubility originated from its protonated amino groups under acidic condition and abundant hydroxyl groups.However,unprotonated NH_(2)group of CS leads to its poor solubility under physiological condition and limits its diverse applications.Therefore,it is highly necessary to summarize the modification strategies of CS derivatives systematically to help researchers select the most appropriate strategies for their specific applications.Herein,we have summarized the modification strategies of CS derivatives for improving their antimicrobial activity,water solubility,biocompatibility,and mechanical property by chemical reaction and physical integration.And then we have reviewed the CS derivatives in hydrogels,nanoparticles,or coatings for medical application in wound dressing,drug delivery,medical implant.Last but not the least,we have put forward the future perspectives of deep studies about structure-activity relationship and clinical applications of CS derivatives.

关键词： Chitosan Modification Structure and property Antimicrobial Biomedical applications

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：