检索结果-南通市图书馆

Plant natural products as effective options for inhibiting foodborne pathogens: A comprehensive review of their activities， mechanisms， and applications in food preservation

引用

Food Science and Human Wellness 2024年

作者： Menglong liu Haiyan Ding Yu Cao Lijing liu Qiaoli Xue Yongjin Hu College of Food Science and Technology， Yunnan Agricultural University School of Public Health， Dali University Editorial Department of Journal of Yunnan Agricultural University

In order to ensure food safety， controlling foodborne pathogen contamination is of utmost importance. Growing apprehensions regarding the safety of synthetic antimicrobials， due to their adverse health effects， have prompted a search for alternative options. Plant natural products (PNPs) with antimicrobial activity are being explored as a viable alternative. Among the various antimicrobial natural products studied， plant essential oils， plant flavonoids， plant polyphenols， plant polysaccharides， and plant antimicrobial peptides have been identified as potential candidates. PNPs demonstrate a diverse array of antimicrobial mechanisms， encompassing cell wall and membrane damage， interference with genetic replication， disruption of energy metabolism， and induction of oxidative stress at the single-cell level， as well as inhibition of biofilm formation and quorum sensing at the population level. Certain PNPs have been harnessed as natural antimicrobial agents for the food preservation. The utilization of encapsulation technology proves to be an effective strategy in protecting PNPs， thereby ensuring good antimicrobial efficacy， enhanced dispersibility， and controlled release within food products. The utilization of nanoemulsions， nanoliposomes， edible packaging， electrospun nanofibers， and microcapsules formed by encapsulation has enriched the ways in which PNPs can be applied in food preservation. Although PNPs have great potential in food preservation， their widespread application in the food industry is currently constrained by factors such as production costs， safety concerns， and legal considerations. Chemical synthesis and biosynthesis pathways offer viable strategies for reducing the cost of producing PNPs， and ongoing efforts to assess safety and improve regulatory frameworks are likely to facilitate the broader adoption of PNPs in food preservation practices. This article provides an overview of the main types of PNPs with antimicrobial activity and their prope

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

《辨证奇闻》消串丹加减治疗淋巴瘤的临证经验

引用

世界中西医结合杂志 2019年第2期14卷 153-156页

作者：张维骏刘润兰崔长虹山西中医药大学山西晋中030619

恶性淋巴瘤(ML)是一组起源于淋巴造血系统的恶性肿瘤的总称。近年来我国该病的发病率呈逐年上升的趋势,目前中医治疗淋巴瘤取得了一定的成绩,但也出现疗效不稳定,时有复发的情形,所以进一步探索恶性淋巴瘤的病因病机及治法方药成为当务... 详细信息

恶性淋巴瘤(ML)是一组起源于淋巴造血系统的恶性肿瘤的总称。近年来我国该病的发病率呈逐年上升的趋势,目前中医治疗淋巴瘤取得了一定的成绩,但也出现疗效不稳定,时有复发的情形,所以进一步探索恶性淋巴瘤的病因病机及治法方药成为当务之急,笔者在傅青主医学体系之《辨证奇闻》中筛选出了有效方剂消串丹,其方义为健脾化痰解郁,消痈散结解毒。以之作为基本方,根据证候分型寒痰凝滞、气郁痰结、血瘀癥积、肝肾阴虚加减化裁,对恶性淋巴肿瘤有明显抑制作用,疗效较肯定,值得临床反复验证及推广。

关键词：傅青主辨证奇闻消串丹淋巴瘤

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

Time-dependent model for two-phase flow in ultra-high water-cut reservoirs: Time-varying permeability and relative permeability

引用

Petroleum Science 2024年第4期21卷 2536-2553页

作者： Shao-Chun Wang Na Zhang Zhi-Hao Tang Xue-Fei Zou Qian Sun Wei liu College of Energy Resources Chengdu University of Technology College of Petroleum Engineering Shandong Institute of Petroleum and Chemical Technology

For the ultra-high water-cut reservoirs, after long-term water injection exploitation, the physical properties of the reservoir change and the heterogeneity of the reservoir becomes increasingly severe, which further aggravates the spatial difference of the flow field. In this study, the displacement experiments were employed to investigate the variations in core permeability, porosity, and relative permeability after a large amount of water injection. A relative permeability endpoint model was proposed by utilizing the alternating conditional expectation(ACE) transformation to describe the variation in relative permeability based on the experimental data. Based on the time dependent models for permeability and relative permeability, the traditional oil-water two-phase model was improved and discretized using the mimetic finite difference method(MFD). The two cases were launched to confirm the validation of the proposed model. The impact of time-varying physical features on reservoir production performance was studied in a real water flooding reservoir. The experimental results indicate that the overall relative permeability curve shifts to the right as water injection increases. This shift corresponds to a transition towards a more hydrophilic wettability and a decrease in residual oil saturation. The endpoint model demonstrates excellent accuracy and can be applied to time-varying simulations of reservoir physics. The impact of variations in permeability and relative permeability on the reservoir production performance yields two distinct outcomes. The time-varying permeability of the reservoir results in intensified water channeling and poor development effects. On the other hand, the time-varying relative permeability enhances the oil phase seepage capacity, facilitating oil displacement. The comprehensive time-varying behavior is the result of the combined influence of these two parameters, which closely resemble the actual conditions observed in oil field expl

关键词： Mimetic finite difference Water flooding reservoir Time-varying physical properties Numerical simulation

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

热处理对(N10276+Q345R)复合板理化性能的影响

引用

金属世界 2010年第1期 22-25页

作者：苏文利刘润生范江峰宝钛集团有限公司宝鸡721014

(N10276+Q345R)复合板兼具了复层金属耐腐蚀和基层金属具有结构强度的特性,因此被广泛应用于工业领域,但N10276在热处理过程中存在敏化区域,如果处理不当从而影响其耐蚀性能,大大降低材料使用寿命。本文通过不同的热处理过程,来分析研究... 详细信息

(N10276+Q345R)复合板兼具了复层金属耐腐蚀和基层金属具有结构强度的特性,因此被广泛应用于工业领域,但N10276在热处理过程中存在敏化区域,如果处理不当从而影响其耐蚀性能,大大降低材料使用寿命。本文通过不同的热处理过程,来分析研究(N10276+Q345R)复合板的力学及耐蚀性能。结果表明最佳热处理制度为:540℃保温3h以上的退火。

关键词： N10276 晶间腐蚀复合板热处理

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

Multi-junction cascaded vertical-cavity surface-emitting laser with a high power conversion efficiency of 74%

引用

Light(Science & Applications) 2024年第3期13卷 555-565页

作者： Yao Xiao Jun Wang Heng liu Pei Miao Yudan Gou Zhicheng Zhang Guoliang Deng Shouhuan Zhou College of Electronics and Information Engineering Sichuan UniversityChengdu 610064China Suzhou Everbright Photonics Co. LtdSuzhou 215163China

High electro-optical conversion efficiency is one of the most distinctive features of semiconductor lasers as compared to other types of *** further increase remains a significant *** enhancing the efficiency of edgeemitting lasers(EEL),which represent the highest efficiency among semiconductor lasers at present,is *** efficiency of vertical cavity surface emitting lasers(VCSELs)has always been relatively low compared to *** paper,combining modeling with experiments,demonstrates the potential of multi-junction cascaded VCSELs to achieve high efficiency beyond that of EELs,our simulations show,that a 20-junction VCSEL can achieve an efficiency of more than 88%at room *** fabricated VCSEL devices with different numbers of junctions and compared their energy efficiency.15-junction VCSELs achieved a maximum efficiency of 74%at room temperature under nanosecond driving current,the corresponding differential quantum efficiency exceeds 1100%,being the largest electro-optical conversion efficiency and differential quantum efficiency reported until now for VCSELs.

关键词： cascaded power cavity

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

Ten key issues for ecological restoration of territorial space

引用

National Science Review 2024年第7期11卷 75-79页

作者： Jian Peng Dongmei Xu Zihan Xu Hui Tang Hong Jiang Jianquan Dong Yanxu liu Technology Innovation Center for Integrated Ecosystem Restoration and Sustainable Utilization Ministry of Natural Resources College of Urban and Environmental Sciences Peking University School of Soil and Water Conservation Beijing Forestry University Key Laboratory for Environmental and Urban Sciences School of Urban Planning and DesignShenzhen Graduate School Peking University School of Landscape Architecture Beijing Forestry University State Key Laboratory of Earth Surface Processes and Resource Ecology Faculty of Geographical Science Beijing Normal University

Ecological restoration is an effective measure to protect biodiversity, sustain ecosystem services and enhance socialecological resilience. It is defined as the process of assisting the recovery of an ecosystem that h... 详细信息

关键词： PRIORITY AREAS

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

Fracture behavior and mechanism of highly fragmented steel cylindrical shell under explosive loading

引用

Defence Technology（防务技术） 2024年第6期36卷 122-132页

作者： Kang Wang Peng Chen Xingyun Sun Yufeng liu Jiayu Meng Xiaoyuan Li Xiongwei Zheng Chuan Xiao Xi'an Modern Chemistry Research Institute Xi'an 710065China Shanxi Jiangyang Chemical Company Limited Taiyuan 030051China Central Iron&Steel Research Institute Company Limited Beijing 100081China China Research and Development Academy of Machinery Equipment Beijing 100089China

An in-depth understanding of the fracture behavior and mechanism of metallic shells under internal explosive loading can help develop material designs for warheads and regulate the quantity and mass distribution of the fragments *** study investigated the fragmentation performance of a new high-carbon silicon-manganese(HCSiMn)steel cylindrical shell through fragment recovery *** with the conventional 45Cr steel shell,the number of small mass fragments produced by the HCSi Mn steel shell was significantly increased with a scale parameter of 0.57 g fitted by the Weibull distribution *** fragmentation process of the HCSi Mn shell exhibited more brittle tensile fracture characteristics,with the microcrack damage zone on the outer surface being the direct cause of its high *** the one hand,the doping of alloy elements resulted in grain refinement by forming metallographic structure of tempered sorbite,so that microscopic intergranular fracture reduces the characteristic mass of the fragments;on the other hand,the distribution of alloy carbides can exert a"pinning"effect on the substrate grains,causing more initial cracks to form and propagate along the brittle carbides,further improving the shell *** the killing power radius for light armored vehicles was slightly reduced by about 6%,the dense killing radius of HCSiMn steel projectile against personnel can be significantly increased by about 26%based on theoretical *** results provided an experimental basis for high fragmentation warhead design,and to some extent,revealed the correlation mechanism between metallographic structure and shell fragmentation.

关键词： Projectile fragmentation Fragment mass distribution Fracture mode Metallographic structure Damage power

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

RISE Method Based on Rare Allele Infusion and Sanger Sequencing Estimation: A Simple, Cheap, and Efficient Method for Detecting Transgene Copy Number in Rice

引用

Rice science 2024年第5期31卷 499-502,I0014-I0020页

作者： liu Tingchang HUANG Lifang liu Peng CUI Yanchun CHEN Caiyan MAO Donghai Key Laboratory of Agro-Ecological Processes in Subtropical Region Institute of Subtropical AgricultureChinese Academy of SciencesChangsha 410125China University of Chinese Academy of Sciences Beijing 100049China

Detecting exogenous gene copy numbers is crucial for examining genetically modified organisms. Traditional methods face a trade-off between feasibility and cost, highlighting the need for a high-precision and low-cost alternative. In this study, we introduced the RISE method, which is based on Rare Allele Infusion and Sanger Sequencing Estimation, for rice.

关键词： Sanger cost Det

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

Nitric oxide synthase-guided genome mining identifies a cytochrome P450 enzyme for olefin nitration in bacterial specialized metabolism

引用

Synthetic and Systems Biotechnology 2024年第1期9卷 127-133页

作者： Hu Li Wei Li Kaihui Song Yu liu Guiyun Zhao Yi-Ling Du Polytechnic Institute Zhejiang UniversityHangzhou310022China Department of Microbiology Zhejiang University School of MedicineHangzhou310058China College of Life Sciences Zhejiang University310058HangzhouChina

The biological signaling molecule nitric oxide(NO)has recently emerged as a metabolic precursor for the creation of microbial natural products with diversified structures and biological *** the biosynthetic gene clusters(BGCs)of these compounds,genes associated with NO production pathways have been *** this study,we employ a nitric oxide synthase(NOS)-guided genome mining strategy for the targeted discovery of NO-derived bacterial natural products and NO-utilizing *** show that a conserved NOS-containing BGC,distributed across several actinobacterial genomes,is responsible for the biosynthesis of lajollamycin,a unique nitro-tetraene-containing antibiotic whose biosynthetic mechanism remains *** a combination of in vivo and in vitro studies,we unveil the first cytochrome P450 enzyme capable of catalyzing olefin nitration in natural product *** results not only expand the current knowledge about biosynthetic nitration processes but also offer an efficient way for targeted identification of NO-utilizing metabolic pathways and novel nitrating biocatalysts.

关键词： Nitric oxide Genome mining Biosynthesis Nitration Cytochrome P450

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

Field-based evidence for the enrichment of intrinsic antibiotic resistome stimulated by plant-derived fertilizer in agricultural soil

引用

Journal of Environmental Sciences 2024年第1期135卷 728-740页

作者： Shihai liu Ziming Han Dong Zhu Xiao Luan liujie Deng Liping Dong Min Yang Yu Zhang State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China State Environmental Protection Engineering Center for Harmless Treatment and Resource Utilization of Antibiotic Residues Khorgos 835007China University of Chinese Academy of Sciences Beijing 100049China

Animal manures have been demonstrated to enhance antibiotic resistance in agricultural ***,little is known about the effects of plant-derived fertilizer on soil antibiotic ***,metagenomic sequencing was used to investigate the effects of a plantderived fertilizer processed from sugarcane and beet on soil antibiotic resistance genes(ARGs)in a soybean field along crop growth *** profiles in the soils amended by plant-derived fertilizer were compared with those in the soils amended by chicken *** abundance and diversity of total ARGs in the soils amended by plant-derived fertilizer were significantly(P<0.05)elevated at the sprout stage,to a level comparable to that in the manured ***,unlike chicken manure mainly introducing manure-borne ARGs to soil,the plant-derived fertilizer was indicated to mainly enrich multidrug resistance genes in soil by nourishing indigenous *** with abundances in amended soils significantly(P<0.05)higher than in unamended soils at the sprout stage of soybean were considered as enriched *** in the abundance of the enriched ARGs was observed in both the amended soils from the sprout to the *** analysis further identified Proteobacteria and Bacteroidetes as the primary bacterial taxa involved in the temporal variation of the enriched ARGs in the soils amended by plant-derived fertilizer,while in manured soils were Firmicutes and *** revealed by multivariate statistical analyses,variation of the enriched ARGs in the soils amended by plant-derived fertilizer was majorly attributed to the response of co-occurred bacteria to depleting nutrients,which was different from the failed establishment of manure-borne bacteria in the manured *** study provided field-based evidence that plant-derived fertilizer stimulated the intrinsic antibiotic resistome,and proposed attention to the un-perceived risk since some clinically relevant ARGs originate and evolve fr

关键词： Organic fertilizer Intrinsic antibiotic resistance Indigenous bacteria Metagenomic sequencing

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：