检索结果-南通市图书馆

Tracking Cryptosporidium in urban wastewater treatment plants in a cold region:Occurrence,species and infectivity

Frontiers of Environmental Science & Engineering 2022年第9期16卷 1-14页

作者： Dan Xiao Zhaofeng Lyu Shiheng Chen yang huo Wei Fan Mingxin huo Jilin Academy of Agricultural Sciences Changchun 130033China School of Chemical Engineering Changchun University of TechnologyChangchun 130012China School of Environment Northeast Normal UniversityChangchun 130117China

This study investigated the occurrence,species,infectivity and removal efficiency of Cryptosporidium *** typical wastewater treatment *** from different process units were collected seasonally and synchronously from four wastewater treatment plants(WWTPs)in Northeastern *** Cryptosporidium oocysts were identified in most samples from both influent(97.50%)and effluent(90.00%)wastewaters of the four WWTPs,at an average density of 26.34 and 4.15 oocysts/L,*** overall removal efficiency was 84.25%,and oocysts were mainly removed(62.01%)by the modified secondary sedimentation *** Cryptosporidium species were identified in the effluent ***,***,and *** were the three most prevalent *** viability assays indicated no reduction of excystation rate during the primary and secondary wastewater treatments(varied in the range of 63.08%–68.50%),but the excystation rate declined to 52.21%in the effluent after ***,the Cryptosporidium oocysts showed higher infection intensity in the cold season(winter and spring)than that in summer and *** influences of environmental temperature on virulence factors of Cryptosporidium were further *** was observed that more extracellular secretory proteins were bound on the oocyst surface and several virulence genes were expressed relatively strongly at low temperatures,both of which could facilitate oocyst adhesion,invasion,and host immune *** research is of considerable interest since it serves as an important step towards more accurate panoramic recognition of Cryptosporidium risk reduction in WWTPs,and especially highlights the potential health risk associated with Cryptosporidium in cold regions/seasons.

关键词： WWTPs Cryptosporidium Occurrence Species Infectivity Low temperature

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

Intensifying electrified flow-through water treatment technologies via local environment modification

引用

Frontiers of Environmental Science & Engineering 2024年第6期18卷 17-25页

作者： Zheng-yang huo Xiaoxiong Wang Xia Huang Menachem Elimelech School of Environment and Natural Resources Institute of Ecological CivilizationRenmin University of ChinaBeijing 100872China Institute for Ocean Engineering Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China Center of Double Helix Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Department of Chemical and Environmental Engineering Yale UniversityNew HavenCT 06520-8286USA

Removing high-risk and persistent contaminants from water is challenging,because they typically exist at low concentrations in complex water *** flow-through technologies are viable to overcome the limitations induced by mass transport for efficient contaminant *** the local environment of the flow-through electrodes offers opportunities to further improve the reaction kinetics and selectivity for achieving near-complete removal of these contaminants from ***,we present state-of-the-art local environment modification approaches that can be incorporated into electrified flow-through technologies to intensify water *** first show methods of nanospace incorporation,local geometry adjustment,and microporous structure optimization that can induce spatial confinement,enhanced local electric field,and microperiodic vortex,respectively,for local environment *** then discuss why local environment modification can complement the flow-through electrodes for improving the reaction rate and ***,we outline appropriate scenarios of intensifying electrified flow-through technologies through local environment modification for fit-for-purpose water treatment applications.

关键词： Point-of-use water treatment Electrified membrane Advection-enhanced mass transport Water decontamination and disinfection Emerging contaminants

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

Breeding ecology of ground tits in northeastern Tibetan plateau, with special reference to cooperative breeding system

引用

Current Zoology 2011年第6期57卷 751-757页

作者： Xin LU Ran huo yang LI Wenbo LIAO Chen WANG Department of Zoology College of Life Sciences Wuhan University Wuhan 430072 China

Data on breeding ecology of a color-band marked population of the ground tit Parus humilis were collected in north Qinghai on the Tibetan plateau, during 2008 and 2009. In spring the birds excavated 0.8-3.2 m long nesting burrows under the ground. First-egg laying occurred between late April and late June during which a pair produced one brood. Incubation was done by female alone for 15-16 days and nestling-feeding by both sexes and helpers in any for 23-25 days. Average brood size at fledging was 5.8 （＋ 1.4 SD, 3-8） and all the 27 observed nesting attempts fledged at least one young. At the population level, brood sex ratio did not differ from 1：1. The birds are a territory-living resident, with annual resight rates being 48% （22 of 46） in adult breeders and 10% （7 of 67） in yearlings. Pairs were socially monogamous, of which 23% （9 of 40） contained one and some- times two male helpers, most likely being philopatric sons of the breeders. The formation of cooperative groups is similar to the population in central Tibet but differs from that in south Guansu where breeding ground tits exhibit a high level of annual turnover

关键词： Burrow-nesting Cooperative breeding Life history Parus humilis Tibetan plateau

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

NUCLEAR SPIN-SPIN COUPLING CONSTANT AND MOLECULAR STRUCTURE——Ⅰ. The Relationship between Coupling Constants and Bond Lengths (Internuclear Distances)

引用

Chinese Journal of Structural Chemistry 1993年第2期 146-154页

作者： yang Wen-huo Lu Ge -TanFujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou,350002

A discussion on the relationship between nuclear spin-spin coupling constants and bond lengths (internuclear distances) will be presented in this paper. The discussion will be focussed on the R-3 rule, the limit of its application and its influencing factors. Specifically, the causes for two long-existing puzzles in NMR coupling constants will be discussed: (a) the abnormal values of the coupling constants in ethylene and acetylene and (b) the "methyl-substitution rule". It will be pointed out that in solution the coupling of intramolecular nuclear spins is affected by many factors and thus will not strictly obey the R-3rule in general. However, in practice, the R-3 rule will still be valid when various influencing factors are carefully taken into consideration.

关键词： NUCLEAR SPIN-SPIN COUPLING CONSTANT AND MOLECULAR STRUCTURE The Relationship between Coupling Constants and Bond Lengths

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

Boundary layer separation control on a highly-loaded,low-solidity compressor cascade

引用

Journal of Thermal Science 2010年第2期19卷 97-104页

作者： Zhou yang,Liu huo-xing,Zou Zheng-ping and Ye Jian National Key Lab.on Aero-Engines,Aero-Engines Simulation Research Center,Beijing Univ.of Aero.& Astro.,Beijing 100083 National Key Lab. on Aero-Engines Aero-Engines Simulation Research Center Beijing Univ. of Aero. & Astro. Beijing China

Separated flow can be effectively controlled through the management of blade boundary layer *** simulations on a highly-loaded,low-solidity compressor cascade indicate that combined blowing and suction flow control technique can significantly improve cascade performance,especially in increasing the cascade loading and static pressure ratio as well as decreasing the loss ***,it is more effective to improve cascade performance by blowing near leading edge on suction surface than suction near trailing *** the locations and flow rates of blowing and suction are major impact factors of this method to cascade *** to the baseline,the static pressure ratio increases by 15% and loss coefficient decreases by 80%,with a blowing fraction of 1.7% and a suction fraction of 1.38% of the inlet mass flow.

关键词： combined blowing and suction flow control compressor cascade boundary layer separated flow

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

PMTDS： a computational method based on genetic interaction networks for Precision Medicine Target-Drug Selection in cancer

引用

Frontiers of Electrical and Electronic Engineering in China 2017年第4期5卷 380-394页

作者： Varshini Vasudevaraja Jamie Renbarger Ridhhi Girish Shah Garrett Kinnebrew Murray Korc Limei Wang yang huo Enze Liu Lang Li Lijun Cheng Department of Biomedical Informatics College of Medicine Ohio State University Columbus OH 43210 USA Department of Medical and Molecular Genetics School of Medicine Indiana University Indianapolis IN 46202 USA Department of Pediatrics hematology/oncology School of Medicine Indiana University Indianapolis IN 46202 USA Department of Medicine Biochemistry and Molecular Biology School of Medicine Indiana University Indianapoiis IN 46202 USA Pancreatic Cancer Signature Center School of Medicine Indiana University Indianapolis IN 46202 USA

Background： Precision medicine attempts to tailor the right therapy for the right patient. Recent progress in large- scale collection of patents＇ tumor molecular profiles in The Cancer Genome Atlas （TCGA） provides a foundation for systematic discovery of potential drug targets specific to different types of cancer. However, we still lack powerful computational methods to effectively integrate multiple omics data and protein-protein interaction network technology for an optimum target and drug recommendation for an individual patient. Methods： In this study, a computation method, Precision Medicine Target-Drug Selection （PMTDS） based on genetic interaction networks is developed to select the optimum targets and associated drugs for precision medicine style treatment of cancer. The PMTDS system includes three parts： a personalized medicine knowledgebase for each cancer type, a genetic interaction network-based algorithm and a single patient molecular profiles. The knowledgebase integrates cancer drugs, drug-target databases and gene biological pathway networks. The molecular profiles of each tumor consists of DNA copy number alteration, gene mutation, and tumor gene expression variation compared to its adjacent normal tissue. Results： The novel integrated PMTDS system is applied to select candidate target-drug pairs for 178 TCGA pancreatic adenocarcinoma （PDAC） tumors. The experiment results show known drug targets （EGFR, IGF1R, ERBB2, NRII2 and AKR1B1） of PDAC treatment are identified, which provides important evidence of the PMTDS algorithm＇s accuracy. Other potential targets PTK6, ATF, SYK are, also, recommended for PDAC. Further validation is provided by comparison of selected targets with, both, cell line molecular profiles from the Cancer Cell Line Encyclopedia （CCLE） and drug response data from the Cancer Therapeutics Response Portal （CTRP）. Results from experimental analysis of forty six individual pancreatic cancer samples show that drugs selected by PMTDS ha

关键词： precision medicine drug target algorithm pancreatic adenocarcinoma biological pathway cancer

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

HPLC-MS/MS法测定洗发水中10种违禁药物

引用

日用化学工业 2020年第3期50卷 199-203页

作者：杨旺火厦门泓益检测有限公司肉食品安全生产技术国家重点实验室福建厦门361000

采用甲醇稀释和高效液相色谱-串联质谱仪,建立了洗发水中10种违禁药物的检测方法。样品经甲醇超声萃取后,以0.1%(v/v)甲酸水溶液和乙腈为流动相,C18色谱柱梯度洗脱分离,采用电喷雾正、负离子源同时采集,多反应监测(MRM)模式进行检测。... 详细信息

采用甲醇稀释和高效液相色谱-串联质谱仪,建立了洗发水中10种违禁药物的检测方法。样品经甲醇超声萃取后,以0.1%(v/v)甲酸水溶液和乙腈为流动相,C18色谱柱梯度洗脱分离,采用电喷雾正、负离子源同时采集,多反应监测(MRM)模式进行检测。结果表明,该方法10种化合物在0.2~10μg/L内均有良好的线性,相关系数大于0.99;添加浓度水平为10~50μg/kg时,平均回收率为90.5%~94.2%,相对标准偏差(RSD)为2.3%~4.8%,方法检出限为0.8~2.4μg/kg,定量限为2.6~7.9μg/kg。

关键词：洗发水高效液相色谱-串联质谱法违禁药物检测

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

论社会主义新农村建设的政府投资法制之完善

引用

华中科技大学学报（社会科学版） 2007年第3期21卷 38-43页

作者：霍阳霍启蒙中国社会科学院法学研究所北京100720 华中科技大学法学院湖北武汉430074

针对社会主义新农村建设需要政府投资支撑这一常态现象,国家应加大政府投资的立法力度,完善农村建设政府投资的宏观调控制度和以项目管理为重点的微观管理制度,建立起由法律、法规和规章组成的完备法律体系,确保农村建设政府投资的效益。

关键词：新农村建设政府投资立法模式

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

流体直接冷却薄板条介质温度及应力的解析表达

引用

物理学报 2016年第5期65卷 115-123页

作者：李策冯国英杨火木四川大学电子信息学院成都610065

基于对流传热和热传导原理,建立了流体直接冷却均匀抽运薄板条激光工作介质的热效应分析模型,采用平面应力近似和最小功原理,得到了板条工作介质内部温度分布和应力分布的解析表达式.研究了不同流道厚度时对流热交换系数和冷却液温升与... 详细信息

基于对流传热和热传导原理,建立了流体直接冷却均匀抽运薄板条激光工作介质的热效应分析模型,采用平面应力近似和最小功原理,得到了板条工作介质内部温度分布和应力分布的解析表达式.研究了不同流道厚度时对流热交换系数和冷却液温升与流体流速的关系,分析了流道厚度对工作介质的温度分布和应力分布的影响规律,讨论了之字形和直通光路时,热致波前畸变随产热功率的变化趋势.结果表明:层流和湍流时,较厚的流道可以实现更好的热管理效率;增益介质中的热分布关于中心平面对称,纵向最大温升出现在出水口端,最大应力畸变集中在板条两端及其侧边;流道厚度较大时,工作介质更易形成一维的温度梯度,产生的应力更小;之字形光路可以明显缓解热光效应导致的波前畸变.

关键词：流体直接冷却薄板条激光器温度分布应力分布总光程差

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

基于客流模拟的沈阳地铁1、2号线换乘站改造设计研究

引用

铁道标准设计 2018年第7期62卷 148-153页

作者：霍扬沈阳地铁集团有限公司沈阳110011

通过对沈阳地铁1、2号线换乘站改造设计过程中引入客流仿真模拟技术,在现状客流分析的基础上得出该站整体客流密度、高密度分布区域及持续时间,结合其他城市客流发展规律,进行客流预测,建立客流仿真模型,通过客流仿真模拟分析得出该站... 详细信息

通过对沈阳地铁1、2号线换乘站改造设计过程中引入客流仿真模拟技术,在现状客流分析的基础上得出该站整体客流密度、高密度分布区域及持续时间,结合其他城市客流发展规律,进行客流预测,建立客流仿真模型,通过客流仿真模拟分析得出该站拥堵原因和改造设计思路,包括提升运能和局部土建改造两个方面,为今后类似的工程改造设计提供参考。

关键词：地铁换乘站客流仿真现状客流客流预测改造设计

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：