检索结果-南通市图书馆

AIm associated with the Igm pentamer: attackers on stand-by at aircraft carrier

Cellular & molecular Immunology 2018年第6期15卷 563-574页

作者： Toru miyazaki Tomoko Yamazaki Ryoichi Sugisawa m Eric Gershwin Satoko Arai Laboratory of molecular biomedicine for Pathogenesis Center for Disease Biology and Integrative MedicineFaculty of MedicineThe University of TokyoTokyo 113-0033Japan CREST Japan Agency for Medical Research and DevelopmentTokyo 113-0033Japan max Planck-The University of Tokyo Center for Integrative Inflammology Tokyo 113-0033Japan Division of Rheumatology Allergy and Clinical Immunology The University of California School of MedicineDavisCA 95616USA

Circulating immunoglobulin m(Igm)exists in a pentameric form,possessing a polyreactive nature that responds not only to foreign antigens but also to autoantigens;thus,it is involved in both beneficial and detrimental immune responses,including protection from infection and the progression of *** the other hand,Igm also behaves as a carrier of the apoptosis inhibitor of macrophage(AIm)protein,storing a large amount of the inactivated form of AIm in the blood through this *** different disease conditions,AIm can dissociate from Igm locally or systemically to exert its function,inducing the removal of various biological debris such as excess fat,bacteria,cancer cells or dead cell *** typically,upon induction of acute kidney injury(AKI),Igm-free AIm is filtered by the glomerulus in the kidney,which stimulates the clearance of intraluminal dead cells debris at the obstructed proximal tubules,thereby facilitating the repair of kidney ***,cats exhibit a deficiency in AIm release from Igm,which may increase their susceptibility to renal ***,association with AIm inhibits Igm binding to the Fcα/μreceptor on follicular dendritic cells at the splenic germinal center,thereby protecting the Igm immune complex from Fcα/μreceptor-mediated internalization,which supports Igm-dependent antigen presentation to b cells and stimulates high-affinity IgG antibody *** regulation of AIm–Igm binding,resulting from the discovery of reciprocal actions between AIm and Igm,could lead to the development of novel therapies against different diseases.

关键词： apoptosis inhibitor of macrophage(AIm) immunoglobulin m(Igm) acute kidney injury(AKI) hepatocellular carcinoma(HCC) cat renal failure

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

NAVSTAR自适应可控天线的性能仿真

引用

GPS天线及其抗干扰技术 2002年第4M期 105-116页

作者： Klinker,f.pietersen,o.b.m.

导航星（NAVSTAR）全球定位系统（GPS）是美国国防部开发的一种导航系统。GPS的主要用途是为军事用户提供高精度的位置和时间数据。虽然扩频技术在GPS中的应用使其具有一定程度的抗人为干扰及非人为干扰的能力，但自适应天线的使用将使... 详细信息

导航星（NAVSTAR）全球定位系统（GPS）是美国国防部开发的一种导航系统。GPS的主要用途是为军事用户提供高精度的位置和时间数据。虽然扩频技术在GPS中的应用使其具有一定程度的抗人为干扰及非人为干扰的能力，但自适应天线的使用将使抗干扰能力有很大的提高。如果有必要通过天线来抑制干扰，那么，所用的天线与整个干扰源所在的环境有关。为了确定对抑制干扰的要求和测定自适应可控天线在电子战环境中的性能，我们开发了ANAbASIS程序。本文将介绍信号传播模型和加权矢量的计算，并给出仿真结果的实例。

关键词： NAVSTAR 仿真全球定位系统 GPS 自适应天线 ANAbASIS程序

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

铁精矿生球的焙烧理论和实践问题

引用

钢铁 1958年第6期 1-7页

作者： b.m.维邱金刘孟星

细磨铁精矿生球的焙烧,是球团矿过程中最重要的阶段。高炉用焙烧球的基本质量要求,已由作者在以前的一篇文章中加以叙述了〔1〕。焙烧的主要目的,是使生球的结构固结和使生球达到最大的氧化度。焙烧的结果取决于生球的性质和焙烧制度。... 详细信息

细磨铁精矿生球的焙烧,是球团矿过程中最重要的阶段。高炉用焙烧球的基本质量要求,已由作者在以前的一篇文章中加以叙述了〔1〕。焙烧的主要目的,是使生球的结构固结和使生球达到最大的氧化度。焙烧的结果取决于生球的性质和焙烧制度。原始生球的物质组成,具有特别巨大的影响。磁铁矿生球的固结,即比赤铁矿生球的固结效率较高和较简单。在制球团矿的实践中,提供焙烧装置的是湿球,因此焙烧的第一阶段是干燥。生球的干燥,象毛细多孔物质一样。这种干燥过程的机构,已由A.b.雷柯夫在其专著“干燥理论”中加以详细制定,本文不再加以探讨〔2〕。焙身,是在生球加热到100℃以后开始的。

关键词：生球固精石灰煤气可燃气体焙烧磁铁矿赤铁矿精矿

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

瘤胃细菌的蛋白质和氨基酸代谢

引用

郑州牧业工程高等专科学校学报 1990年第2期13卷 49-54页

作者： m.A.COTIAAn D R.b.HESPELL

由于摄入的食料进入真胃前先到达瘤胃,使食料在被宿主消化前先受到微生物的分解。瘤胃消化的结果产生了挥发性脂肪酸(VFA＇S)和细菌细胞体,它们分别是宿主动物代谢所需的能量和蛋白质的主要来源。由于这些关系,反刍动物的氮代谢和寄居... 详细信息

由于摄入的食料进入真胃前先到达瘤胃,使食料在被宿主消化前先受到微生物的分解。瘤胃消化的结果产生了挥发性脂肪酸(VFA＇S)和细菌细胞体,它们分别是宿主动物代谢所需的能量和蛋白质的主要来源。由于这些关系,反刍动物的氮代谢和寄居在瘤胃中的所有微生物的氮代谢是密切相关的。反刍动物氮代谢的任何形式必须包括瘤胃微生物所进行的氮代谢的过程。在这篇文章中将讨论蛋白质的消化、肽的利用以及氨基酸降解方面的内容。

关键词：瘤胃细菌氨基酸代谢真胃瘤胃消化氮代谢蛋白水解酶挥发性脂肪酸宿主动物水解活性细菌细胞

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 Nodulation Genes (nod Locus 5) From Azorhizobium caulinoaans ORS571

引用

Science China Chemistry 1993年第10期36卷 1177-1185页

作者：高盟生尤崇杓 K.Goethals m.Holsters Department of biotechnology IAAE Chinese Academy of Agricultural Sciences Beijing 100094 PRC Laboratrium vor Genetica Universiteit Gent. B-9000 Gent Belgium

An 800 bp AccI-PUCII DNA containing promoter region of nodAbC (P_i)from A. caulinodans ORS571 was cloned and used as a hybridization probe against the chrom(?)some DNA, which led to the identification of another 8.4-kb EcoRI fragment showing homology to P_1. A corresponding clone of 8.4-kb DNA was isolated from a pLAFI gene bank (pRG90). The restriction enzyme analysis and DNA-DNA hybridization of 8.4-kbDNA indicated the P_1 homology was located in the 450-bp SmaI-SphI region (P_2 region). Ω insertion deletion of 8.4 kb DNA resulted in a mutant strain ORS571-5 that delayed to nodulate the stems of S. rostrata. This phenotype was complemented by the introduction of pRK84 carrying nod locus 5 DNA.

关键词： nod gene promoter DNA-DNA hybridization Ω factor.

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

Evaluating and mapping Grape Color Using Image-based Phenotyping

引用

Plant Phenomics 2020年第1期2卷 95-105页

作者： A.N.Underhill C.D.Hirsch m.D.Clark Department of Horticultural Science University of MinnesotaSt.PaulMNUSA Department of Plant Pathology University of MinnesotaSt.PaulMNUSA

Grape berry color is an economically important trait that is controlled by two major genes influencing anthocyanin synthesis in the *** is often described qualitatively using six major categories;however,this is a subjective rating that often fails to describe variation within these six *** investigate minor genes influencing berry color,image analysis was used to quantify berry color using different color *** image analysis pipeline was developed and utilized to quantify color in a segregating hybrid wine grape population across two *** were collected from grape clusters immediately after harvest and segmented by color to determine the red,green,and blue(RGb);hue,saturation,and intensity(HSI);and lightness,red-green,and blue-yellow values(L∗a∗b∗)of *** analysis identified known major QTL for color on chromosome 2 along with several previously unreported smaller-effect QTL on chromosomes 1,5,6,7,10,15,18,and *** study demonstrated the ability of an image analysis phenotyping system to characterize berry color and to more effectively capture variability within a population and identify genetic regions of interest.

关键词： Image image mapping

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

Evolution of sexual size dimorphism and its relationship with sex ratio in carabid beetles of Genus Ceroglossus Solier

引用

Current Zoology 2013年第6期59卷 769-777页

作者： Hugo A. bENITEZ Jorge AVARIA-LLAUTUREO Cristian b.CANALES-AGUIRRE Viviane JEREZ Luis E. PARRA Cristifin E.HERNANDEZ Faculty of Life Sciences University of Manchester Michael Smith Building Oxford Road Manchester M13 9PT UK Instituto de Alta Investigaci6n Universidad de Tarapaca Casilla 7-D Arica Chile Departamento de Zoologia Facultad de Ciencias Naturales y Oceanograficas Universidad de Concepcion Casilla 160-C Concepcion Chile Departamento de Oceanografia Facultad de Ciencias Naturales y Oceanograficas Universidad de Concepci6n Casilla 160-C Concepcion Chile

Although the degree of mate competition, given extreme differences in sex ratio, explains much of the pattern of male-biased size dimorphism among diverse taxa, it fails for some species which have potential for intense male competition for mates and yet exhibit little or no sexual size dimorphism （SSD）. This fact suggest that species with low SSD should be express the effect of evolutionary pressure in non-obvious geometrical shape promoted by sex ratio in an evolutionary time scale. To evaluate this hypothesis we used phylogenetic comparative method in a bayesian framework to investigate the evolution of SSD and the role of sex ratio at inter-specific level in the species of Ceroglossus （Coleoptera： Carabidae）. In our results the proportion farthest from 1：1 is associated with more disparate body shape, even though the entire group has minimum variation in sex ratio, which is an intrinsic life history character of this group considering its phylogenetic conservatism or phylogenetic signal. We suggest that the sex ratio has determined the dimorphism degree during evolution of this group, since both traits have increased or decreased together during the species divergence （i.e. positive phylogenetic correlation： r2=0.85）. We suggest that morphological studies of SSD will benefit from using comparative method with bayesian approaches to assess the effect of phylogenetic history and its uncertainty. Finally, this will be allow to researchers to quantify the uncertainty of specific evolutionary hypotheses accounting for observed sexual dimorphism patterns.

关键词： macroevolution Geometric morphometrics bayesian approach Sexual Dimorphism Sex Ratio Ceroglossus

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

Effects of Plant Residue Decomposition on Soil N Availability,microbial biomass and β-Glucosidase Activity During Soil Fertility Improvement in Ghana

引用

Pedosphere 2019年第5期29卷 608-618页

作者： Samuel T. PARTEY Robert b. Z0UGm0RE Naresh V. THEVATHASAN Richard F. PREZIOSI CGI AR CCAFS West Africa ProgramInternational Crops Research Institute for the Semi-Arid Tropics (ICRISAT)Bamako B.P. Box 320 (Mali) School of Environmental Sciences University of GuelphGuelph NIG 2W1 (Canada) Faculty of Life Sciences The University of ManchesterManchester M13 9PL (UK)

With limited use of inorganic fertilizers on smallholder farms,plant residues could be viable alternatives for soil fertility *** study was conducted to determine how residue quality and decomposition of nine plant species influence soil N availability,microbial biomass,andβ-glucosidase activity during soil fertility *** differences in N concentration were found among the species,ranging from 12.2 g kg-1 in Zea mays to 39.2 g kg-1 in baphia *** C/N ratio was the highest in ***(34.4),whereas lignin and polyphenol concentrations were the greatest in Acacia *** highest decomposition rate(0.251%per day)occurred in Tithonia diversifolia,and the lowest in ***,Albizia zygia,***,and ***,with the half-lives of 28-56 *** 80%and 89%of N,P,K,Ca,and mg were released from *** in 7 d,compared with over 70%retention in ***,***,and *** decomposition and nutrient release half-lives of Gliricidia sepium,Leucaena leucocephala,Azadirachta indica,and Senna spectabilis were less than 14 *** mineral N,microbial biomass,andβ-glucosidase activity increased under all treatments,with *** having the greatest *** N mineralization occurred in all of the species throughout the experiment,an initial N immobilization was recorded in the ***,***,***,and *** treatments for up to 14 *** and nutrient release rates,mineral N,soil microbial biomass,andβ-glucosidase activity were dependent on residue quality,and P and lignin levels,the lignin/N ratio,and the(lignin+polyphenol)/N ratio had the most significant effects(P≤0.05).

关键词： leguminous species litter quality microbial activity N mineralization nutrient release organic matter

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

Granulite Facies metamorphic Age and Tectonic Implications of bIFs from the Kongling Group in the Northern Huangling Anticline

引用

Journal of Earth Science 2012年第5期23卷 648-658页

作者：岑洋彭松柏 Timothy m Kusky 蒋幸福王璐 Faculty of Earth Sciences China University of Geosciences State Key Laboratory of Geological Processes and mineral Resources China University of Geosciences Three Gorges Research Center for Geo-hazard Ministry of EducationChina University of Geosciences

We report preliminary results of a geochemical study on banded iron formations （bIFs） in the Zhaojiayangpo （赵家阳坡） area from the Kongling （崆岭） Group in the northern Huangling （黄陵） anticline, on the northern margin of the Yangtze craton. The CL （cathodoluminescence） images of zircons mostly have sector zoning, fir-tree zoning and patched zoning, and a few show core-rim tex-tures with rims having patched zoning. The calculated formation temperatures using the Ti-in-zircon thermometer are 660-808 ℃ （714 ℃C in aver-age）, all indicating that the bIFs underwent granulite facies metamorphism. The age of zir-cons with granulite facies metamorphism is 1 990±14 ma by LA-ICP-mS U-Pb dating, indi-cating that there was a significant granulite fa-cies tectonothermal event in the northern Huangling anticline in the Paleoproterozoic, which may be related with tectonic thermal events of the metamorphism caused by the as-sembly of the Columbia supercontinent with South China. moreover, the REE pattern ischaracterized by depletion in LREE while relatively flat in HREE, LaN/YbN=0.26, with a positive Eu anomaly （Eu/Eu^＊---1.59）, which reveals its hydrothermal sedimentation origin and it may have formed in the environment of submarine exhalation.

关键词： Huangling anticline banded iron formation (bIF) zircon LA-ICP-mS U-Pb dating,granulite facies metamorphism Columbia supercontinent.

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

Transfusion-transmitted virus in association with hepatitis A-E viral infections in various forms of liver diseases in India

引用

World Journal of Gastroenterology 2006年第15期12卷 2432-2436页

作者： m Irshad Y Sharma I Dhar J Singh YK Joshi Clinical biochemistry Division Department of Laboratory medicine All India Institute of Medical SciencesAnsari NagarNew Delhi 110029India Department of Gastroenterology & Human Nutrition Unit All India Institute of medical Sciences Ansari NagarNew Delhi-110029India

AIm： To describe the prevalence of transfusiontransmitted virus （TTV） infection in association with hepatitis A-E viral infections in different forms of liver diseases in North India. mETHODS： Sera from a total number of 137 patients, including 37 patients with acute viral hepatitis （AVH）, 37 patients with chronic viral hepatitis （CVH）, 31 patients with cirrhosis of liver and 32 patients with fulminant hepatic failure （FHF）, were analyzed both for TTV-DNA and hepatitis A-E viral markers. Presence of hepatitis b virus （HbV）, hepatitis C virus （HCV） and hepatitis E virus （HEV） infections was detected in different proportions in different groups. moreover, rrV-DNA was simultaneously tested in 100 healthy blood donors also. RESULTS： None of the patients had hepatitis A virus （HAV） and hepatitis D virus （HDV） infections. Overall prevalence of TTV-DNA was detected in 27.1% cases with AVH, 18.9% cases with CVH, 48.4% cases with cirrhosis and 9.4% cases with FHF. TTV-DNA simultaneously tested in 100 healthy blood donors showed 27% positivity. On establishing a relation between TTV infection with other hepatitis viral infections, TTV demonstrated co-infection with HbV, HCV and HEV in these disease groups. Correlation of TTV with ALT level in sera did not demonstrate high ALT level in TTV-infected patients, suggesting that TI-V does not cause severe liver damage. CONCLUSION： TTV infection is prevalent both in patients and healthy individuals in India. However, it does not have any significant correlation with other hepatitis viral infections, nor does it produce an evidence of severe liver damage in patients with liver diseases.

关键词： Transfusion-transmitted virus HCV hepatitis AVH

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

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：