检索结果-南通市图书馆

Journal of Animal Science and Biotechnology 2019年第3期10卷 673-682页

作者： Hongmin Jia Ting He Haitao Yu Xiangfang Zeng Shihai Zhang wenfeng ma Jie Zhang Shiyan Qiao Xi ma State Key Laboratory of Animal Nutrition College of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193China Guangdong Provincial Key Laboratory of Animal Nutrition Control College of Animal ScienceSouth China Agricultural UniversityGuangzhou 510642China College of Animal Science and Technology Henan University of Science and TechnologyLuoyang 471003HenanChina College of Animal Science and Technology Qingdao Agricultural UniversityQingdao 266109China

Background: Lysine is used widely in livestock production due to the shortage of feed protein ***·H2SO4 contains L-lysine sulphate as well as fermentation co-products which contain other amino acids and ***,there are few articles about L-lysine·H2SO4 product regarding intestinal morphology and liver pathology of broiler *** this article,we focus on the absorption and metabolism of L-lysine·H2SO4 revealed in the variation of intestinal morphology and liver pathology to determine the tolerance of chicks for L-lysine·***: To evaluate the tolerance of broilers for L-lysine·H2SO4,240 one day old broilers were allocated randomly to one of five dietary treatments which included corn-soybean diets containing 0,1%,4%,7% or 10% L-lysine·H2SO4(L-lysine content = 55%).Results: Supplementation of 1% L-lysine·H2SO4 in the diet had no negative ***,4%,7% or 10% Llysine·H2SO4 supplementation produced negative responses on broiler performance,carcass characteristics,blood biochemistry,and particularly on intestinal morphology and liver pathology compared with broilers fed the control ***: Our results show that supplementation with 1% L-lysine·H2SO4 had no negative effects on performance,carcass characteristics,blood biochemistry,intestinal morphology and liver pathology in broilers,but supplementation with 4%,7% or 10% L-lysine·H2SO4 produced a negative response,particularly with respect to intestinal morphology and liver pathology.

关键词： Broilers Intestinal morphology Liver pathology L-lysine·H2SO4

High cell density and high expression of recombinant human ApoA-I_(Milano) in Escherichia coli by twice temperature-shifted induction

在线全文

学校读者我要写书评

暂无评论

Frontiers in Biology 2006年第4期1卷 345-348页

作者： ZHUANG Yingping ma wenfeng GUO Meijin DING mansheng CHU Ju ZHANG Siliang State Key Laboratory of Bioreactor Engineering National Research Center for BiotechnologyEast China University of Science and TechnologyShanghai 200237China State Key Laboratory of Bioreactor Engineering and National Research Center for Biotechnology East China University of Science and TechnologyShanghai 200237China

The effect of temperature on the formation of recombinant protein,apolipoprotein A-IMilano was investigated in the present *** temperature of the initial growth phase was set at 30ºC,while temperature variation in induction phase was arranged in three *** cell-density culture of Escherichia coli and high expression of recombinant human by twice temperature-shifted induction were carried *** results showed that ApoA-IMilano reached 4.8 g/L with the final cell density of OD600,*** was found that twice temperature-shifted induction could successfully avoid the effect of acetic acid on cell density and the expression of the *** present study provides a basic procedure for the production of recombinant ApoA-IMilano.

关键词： recombinant Escherichia coli ApoA-IMilano high density high expression twice temperature-shifted induction

Imbalance of Interleukin 18 and Interleukin 18 Binding Protein in Patients with Lupus Nephritis

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

Cellular & Molecular Immunology 2006年第4期3卷 303-306页

作者： Dong Liang wenfeng ma Cuiwei Yao Huafeng Liu Xiaowen Chen Insfitute of Nephrology Guangdong Medical College Zhanjiang Guangdong 524001 China

To evaluate the balance status of interleukin 18 （IL-18） and interleukin 18 binding protein （IL-18BP） in circulation in patients with lupus nephritis （LN） and primary nephrotic syndrome （PNS）, plasma levels as well as mRNA expression in peripheral blood mononuclear cells （PBMCs） of IL-18 and IL-18BP were measured by ELISA and RT-PCR respectively. The ratio of IL-18/IL-18BP was also calculated. Both plasma IL-18 and IL-18BP increased significantly in LN patients while only IL-18BP increased in PNS, which resulted in an elevated ratio of IL-18/IL-18BP in LN but not in PNS patients when compared with normal controls. In contrast, increased level of IL-18 mRNA was only detected in LN but not in PNS group, although IL-18BP mRNA expressions in PBMCs in both groups were higher than that in control. The imbalance of IL-18 and IL-18BP might be involved in the pathogenesis of LN, based on which a therapeutic approach is valuable to be developed for LN.

关键词： IL-18 IL-18 binding protein lupus nephritis primary nephrotic syndrome

Multipair two-way massive MIMO AF relaying with ZFR/ZFT and hardware impairments over high-altitude platforms

在线全文

学校读者我要写书评

暂无评论

Journal of Communications and Information Networks 2016年第3期1卷 105-114页

作者： SUN Xiaoli XU Kui XU Youyun ma wenfeng PLA University of Science and Technology Nanjing 210007China Nanjing University of Posts and Telecommunications Nanjing 210023China

HAPs(High-Altitude Platforms)are one of the most promising alternative infrastructures for providing wireless communications to overcome the shortcomings of terrestrial-tower-based and satellite *** paper investigates a multipair two-way MM-AF(massive MIMO Amplify-and-Forward)relay system over HAPs,where multiple user pairs exchange information within a pair through a relay with a very large number of antennas,and a HAP channel is modeled to follow a Rician fading distribution because of the presence of a line-of-sight ***,the effect of hardware impairments on a multipair two-way MM-AF system is taken into consideration and is modeled using transmit and receive distortion ***,ZFR/ZFT(Zero-Forcing Reception/Zero-Forcing Transmission)processing matrices of HDR(Half-Duplex Relaying)and FDR(Full-Duplex Relaying)with imperfect channel state information are ***,the asymptotic expressions of an end-to-end SINR are *** analyses and simulation results show that when the number of relay antennas grows very large,the SE(Spectral Efficiency)of an MM-AF relay system is limited by hardware impairments at the users instead of those at the relay,or by other types of ***,the quality of the hardware at a relay can be decreased without significantly degrading performance.

关键词： massive MIMO half-duplex full-duplex Rician fading channels hardware impairments

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

可行能力视野下我国精准扶贫的新思路

西北民族研究 2017年第4期 231-236页

作者：马文峰国家民委办公厅中央民族大学经济学院

让现有标准下4335万农村贫困人口全部脱贫,是决胜全面小康的艰巨任务。长期以来,我国扶贫工作存在扶贫目标偏离、运动式扶贫、贫困人口有"等、靠、要"依赖性思想等方面的问题,为此,提高扶贫的精准性尤为重要。通过对阿马蒂亚·森可行能... 详细信息

让现有标准下4335万农村贫困人口全部脱贫,是决胜全面小康的艰巨任务。长期以来,我国扶贫工作存在扶贫目标偏离、运动式扶贫、贫困人口有"等、靠、要"依赖性思想等方面的问题,为此,提高扶贫的精准性尤为重要。通过对阿马蒂亚·森可行能力理论的研究可知,可行能力理论与精准扶贫在精准性、主动性和长效性上有高度的相关性,可为我国扶贫事业提供理论向导。本文提出政府应从基本公共服务、基本医疗卫生和基本公共教育三个维度提升贫困人口的可行能力,进而推动我国精准扶贫事业的发展,确保所有贫困人口如期在2020年全面实现小康。

关键词：可行能力贫困精准扶贫可行能力建设

在线全文

学校读者我要写书评

暂无评论

数字资源整合:信息资源管理领域的新课题

情报资料工作 2007年第1期28卷 39-40页

作者：马文峰

自2001年起本刊开设"社科基金项目动态"栏目以来,受到了广大读者的热烈欢迎。从本期起,本刊将不定期开设"基金项目"专栏,集中刊登国家级、省部级以及其它各种基金资助项目的研究成果,旨在全方位、多角度地将某一专题的研究引向深入。本... 详细信息

自2001年起本刊开设"社科基金项目动态"栏目以来,受到了广大读者的热烈欢迎。从本期起,本刊将不定期开设"基金项目"专栏,集中刊登国家级、省部级以及其它各种基金资助项目的研究成果,旨在全方位、多角度地将某一专题的研究引向深入。本期我们刊登了中国人民大学图书馆马文峰研究馆员主持的国家社会科学基金项目"数字资源整合的理论与方法"的部分研究成果,也欢迎各种基金项目的主持人与本刊编辑部联系,共同将这一栏目办好。

关键词：数字资源整合管理领域信息资源国家社会科学基金项目新课题社科基金项目基金资助项目研究成果

维普期刊数据库人大复印报刊资料

一种人与人和物到物业务共存下的异构蜂窝网络柔性接入策略

在线全文

学校读者我要写书评

暂无评论

电子与信息学报 2020年第8期42卷 1918-1925页

作者：田辉何雷马文峰王聪陆军工程大学野战工程学院南京210007

针对人与人(H2H)和物到物(M2M)业务共存的异构无线网络,该文设计了一种根据业务特性的代理节点的网络选择策略,用博弈论对以保障两类业务服务质量(QoS)需求和网络负载均衡为目标的代理节点网络选择问题进行建模,并分析了该博弈模型纳什... 详细信息

针对人与人(H2H)和物到物(M2M)业务共存的异构无线网络,该文设计了一种根据业务特性的代理节点的网络选择策略,用博弈论对以保障两类业务服务质量(QoS)需求和网络负载均衡为目标的代理节点网络选择问题进行建模,并分析了该博弈模型纳什均衡(NE)的存在性和可行性;同时,提出了基于学习自动机的分布式网络-信道选择算法(DNCSALA),求得该博弈的纳什均衡。仿真结果表明,所提算法能够获得与穷举搜索算法相近的性能,可满足共存场景中不同类型业务的QoS需求并提高网络资源利用率。

关键词：异构蜂窝网 H2H和M2M共存网络选择博弈论