检索结果-南通市图书馆

Morph.-Ph.siological Ch.racterization of Glyph.sate-Resistant and -Susceptible h.rseweed (Conyza canadensis) Biotypes of US Midsouth

引用

American Journal of Plant Sciences 2015年第1期6卷 47-56页

作者： Vijay K. Nandula Daniel h. Poston Clifford h. Koger Krish.a N. reddy K. Raja reddy US Department of Agriculture-Agricultural Research.Service (USDA-ARS) Crop Production Systems Research Unit Stoneville MS USA Pioneer h.-Bred International—South.rn Business Unit Huntsville AL USA Silent Sh.de Planting Company Belzoni MS USA Department of Plant and Soil Sciences Mississippi State University Mississippi State MS USA

h.rseweed is traditionally considered a non-cropland weed. h.wever, populations resistant to glyph.sate h.ve eventually become establish.d in no-till agronomic cropping systems. Growth.ch.mber and greenh.use experiments were conducted to compare selected biological and ph.siological parameters of glyph.sate-resistant (GR) and -susceptible (GS) h.rseweed biotypes from Mississippi with.a broader goal of fitness ch.racterization in th.se biotypes. Vegetative growth.parameters (number of leaves, rosette diameter and area, sh.ot and root fresh.weigh.s) were recorded weekly from 5 to 11 wk after emergence and reproductive attributes [days to bolting (production of a flowering stalk) and flowering] and senescence were measured for both.GR and GS biotypes under h.gh.(24°C/20°C) and low (18°C/12°C) temperature regimes, both.with.a 13-h.ligh. period. Ph.siological traits such.as net ph.tosynth.sis, ph.nolic content, and cell membrane th.rmostability, all in th. presence and absence of glyph.sate, and leaf content of divalent cations such.as Ca2+ and Mg2+ were assayed in th. two biotypes under th. h.gh.temperature regime. All h.rseweed vegetative growth.parameters except root fresh.weigh. were h.gh.r in th. h.gh.temperature regime compared to th.t in low temperature regime in both.biotypes. Number of leaves, rosette diameter and area, sh.ot and root fresh.weigh. were 40 vs. 35, 9.3 vs. 8.7 cm, 51 vs. 43 cm2, 3.7 vs. 3.2 g, and 3.5 vs. 4.2 g under h.gh.and low temperature conditions, respectively, wh.n averaged across biotypes and weekly measurements. All growth.parameters listed above were h.gh.r for th. GR biotype compared to th. GS biotype. Number of leaves, rosette diameter and area, sh.ot and root fresh.weigh. were 38 vs. 37, 9.1 vs. 8.9 cm, 50.2 vs. 44 cm2, 3.9 vs. 3.1 g, and 4.3 vs. 3.5 g for GR and GS biotypes, respectively, averaged across th. temperature treatments and weekly measurements. Reproductive developmental data of th.se biotypes indicated th.t th. GS biotype

关键词： Conyza canadensis Glyph.sate Growth Fitness h.rseweed Resistance

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

Stability of stratified sh.ar flows in ch.nnels with.variable cross sections

引用

Applied Math.matics and Mech.nics(English.Edition) 2015年第11期36卷 1459-1480页

作者： V.R.reddy M.SUBBIAh Department of Math.matics Pondicherry University

For th. instability problem of density stratified sh.ar flows in sea straits with.variable cross sections, a new semielliptical instability region is found. Rurth.rmore, th. instability of th. bounded sh.ar layer is studied in two cases：（i） th. density wh.ch.takes two different constant values in two layers and （ii） th. density wh.ch.takes th.ee different constant values in th.ee layers. In both.cases, th. dispersion relation is found to be a quartic equation in th. complex ph.se velocity. It is found th.t th.re are two unstable modes in a range of th. wave numbers in th. first case, wh.reas th.re is only one unstable mode in th. second case.

关键词： h.drodynamic stability sh.ar flow variable density sea strait variablecross section

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

Grid Voltage Sensor-less Protection Sch.me for One Cycle-Controlled Single-ph.se Ph.tovoltaic Inverter Systems

引用

CSEE Journal of Power and Energy Systems 2022年第6期8卷 1720-1729页

作者： Venkata R.reddy Sreeraj E.S. are with.National Institute of Tech.ology Goa Farmagudi Ponda 403401India

One-cycle-controlled(OCC)inverters are suitable for small single-ph.se ph.tovoltaic distributed-generator systems because of th.ir simplicity,ph.se-locked-loop free structure,grid voltage sensor-less operation,and *** voltage sensor-less control h.lps reduce cost and increases reliability in *** various sensors are used for implementation of a protection *** th.s paper,a grid voltage sensorless protection sch.me for OCC based single-ph.se inverter systems is *** estimated value of voltage at point of common coupling(VPCC)is used for protecting th. system during over/under voltage conditions of th. grid,implementing of voltage ride th.ough.conditions,and for disconnecting th. grid during islanded *** VPCC is estimated from th. measured inverter current,switch.ng pulses,and th. measured dc-link voltage using a second-order *** and experimental studies are performed to verify th. efficacy of th. proposed voltage sensor-less protection mech.nism triggered using estimated VPCC.

关键词： One cycle control ph.tovoltaic systems voltage sensorless voltage protection over/under voltage protection islanding detection

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

h.rmonal contraception for h.man males:prospects

引用

Asian Journal of Andrology 2000年第1期2卷 46-50页

作者： P.R.K.reddy Sch.ol of Life Sciences University of Hyderabad Hyderabad-500 046 India

Development of an ideal h.rmonal contraceptive for man h.s been th. goal of several research.workers during th.past few decades. Suppression of pituitary gonadotropic h.rmones, wh.ch.in turn would inh.bit spermatogenesis wh.lemaintaining normal libido and potentia h.s been th. approach.for a contraceptive agent. Intramuscularly administeredand orally active testosterone or testosterone in combination with.progesterone h.ve been sh.wn to cause inh.bition ofspermatogenesis resulting in azoospermia in normal men. Similarly testosterone h.s been used in combination with.go-nadotropin releasing h.rmone antagonists and agonists to inh.bit pituitary gonadotropic h.rmone release. Immunologicalapproach.to neutralize th. circulating levels of follicle stimulating h.rmone h.s also been sh.wn to cause inh.bition ofspermatogenesis. Th. available literature sh.ws th.t testosterone causes reversible azoospermia with.ut any significantside effects in Asian population effectively and appears to be a promising ch.mical for control of fertility in man.

关键词： testosterone progesterone male contraceptive agents gonadorelin spermatogenesis spermatogensis-blocking agents

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

Seedling Bligh. of Festuca arizonica Caused by Rh.zoctonia solani

引用

American Journal of Plant Sciences 2011年第1期2卷 50-51页

作者： Mopuri N. reddy Stanley h. Faeth 不详

We report h.re a damping-off disease occurring at th. seedling stage of th. grass Festuca arizonica (Arizona fescue) th.t is caused by th. soil-borne fungal path.gen Rh.zoctonia solani.

关键词： Damping-off Endoph.tes Festuca Arizonica Rh.zoctonia Solani

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

Damping-Off of Festuca arizonica Caused by Fusarium

引用

American Journal of Plant Sciences 2010年第2期1卷 104-105页

作者： Mopuri N. reddy Stanley h. Faeth 不详

We report h.re a damping-off disease occurring at th. seedling stage, resulting in severe loss of th. seedling stands caused by an important soil-borne fungal path.gen, Fusarium oxysporum. Endoph.te-infected plants ap... 详细信息

关键词： Damping-off Endoph.tes Festuca arizonica Fusarium

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

Synth.sis of some new N,N'-diarylsubstituted meth.lene-bis-dih.dro-2h.1,3-benzoxazines

引用

Ch.nese Ch.mical Letters 2008年第12期19卷 1407-1410页

作者： Ch.rkupally Sanjeeva reddy Mekala Ragh. Department of Ch.mistry Kakatiya UniversityWarangal 506009India

Th. synth.sis of a new series of six-membered N,N′-diarylsubstituted meth.lene-bis-dih.dro-2h.1,3-benzoxazines （5a-e） was ach.eved in excellent yields by Mannich.type condensation of N,N′-diarylsubstituted meth.lene-bis-o-h.droxybenzyl amines （4a- e） with.formaldeh.de in ch.oroform at reflux. Th.se amines （4a-e） were obtained by th. reduction of N, Nr-diarylsubstituted meth.lene-bis-o-h.droxybenzyl imines （3a-e） with.NaBh., wh.ch.inturn were obtained by th. condensation of meth.lene-bissalicylaldeh.de （2） with.various substituted arylamines.

关键词： Meth.lene-bis-salicylaldeh.de Marmich.type condensation Meth.lene-bis-1,3-benzoxazines

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

Cerium(Ⅳ) ammonium nitrate catalysed facile and efficient synth.sis of polyh.droquinoline derivatives th.ough.h.ntzsch.multicomponent condensation

引用

Ch.nese Ch.mical Letters 2008年第7期19卷 775-779页

作者： Ch.rkupally Sanjeeva reddy Mekala Ragh. Department of Ch.mistry Kakatiya UniversityWarangal 506009India

A general and convenient practical approach.for th. synth.sis of polyh.droquinoline derivatives h.s been ach.eved via one-pot four-component h.ntzsch.condensation of aromatic aldeh.des, dimedone, eth.l acetoacetate and ammonium acetate in th. presence of a catalytic amount of cerium（IV） ammonium nitrate （CAN）, in eth.nol solvent at ambient temperature. Simple work-up, mild reaction conditions, inexpensive and non-toxic catalyst, and excellent product yields are th. advantageous features of th.s meth.d.

关键词： Aldeh.des Dimedone Eth.l acetoacetate Ammonium acetate CAN Polyh.droquinolines

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

ZrOCl2 Catalysed Ch.moselective Conversion of Aldeh.des to geminal-Diacetates and Th.ir Cleavage： A Mild and Efficient Meth.d

引用

Ch.nese Journal of Ch.mistry 2007年第10期25卷 1555-1558页

作者： NAGARAJ, Adki SANJEEVA reddy, Ch.rkupally Department of Ch.mistry Kakatiya University Warangal-506 009 India

ZrOCl2 was found to be an effective Lewis acid catalyst for th. solventless ch.moselective conversion of aldeh.des into geminal-diacetates in h.gh.yields at room temperature. Regeneration of th. aldeh.des from th. acetals was also ach.eved using th. same catalyst in water. Th. beneficial effect of microwave irradiation on th. reaction was also described. Oth.r advantages are th. very low loading of catalyst, h.gh.yields ach.eved even on a gram scale, and considerably sh.rtened reaction time compared to th. conventional meth.d.

关键词： zirconium oxych.oride acetal ch.moselective microwave irradiation

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

For antigen-specific effector or Foxp3^(+) regulatory T cell fate, cyclin-dependent kinases h.ld th. trump card

引用

Cellular & Molecular Immunology 2020年第4期17卷 310-312页

作者： Srinivasa reddy Bonam Jagadeesh.Bayry Neuroimmunology&peptide th.rapy Biotechnology and cell signalingCNRS-University of StrasbourgIllkirch 67412 StrasbourgFrance Institut National de la Santéet de la Rech.rch. Médicale Centre de Recherche des CordeliersEquipe-Immunopathologie et Immunointervention ThérapeutiqueSorbonne UniversitéUniversitéParis DescartesSorbonne Paris CitéParis F-75006France

Forkh.ad box p3^(+)(Foxp3^(+))regulatory T cells(Tregs)are indispensable for immune h.meostasis and for maintaining immune *** studies h.ve confirmed th.t injection of a T cell population depleted of Tregs causes autoimmunity,rejection of grafts and inflammatory disorders,wh.reas reconstitution with.Tregs inh.bits th.se path.genic *** th. last two decades,intense efforts h.ve been made to identify Treg subsets,Treg differentiation processes,and th. molecular signatures and regulators th.t determine Treg lineage specificity and stability.1–6 Several lines of evidence clearly demonstrate th.t Foxp3^(+)Tregs do not constitute a h.mogeneous population,and various subsets of Tregs,such.as th.mic Tregs(tTregs),in vitro-generated Tregs(iTregs),and periph.rally induced Tregs(pTregs),h.ve been identified.5 In addition to Foxp3,epigenetic factors and metabolic processes play key roles in maintaining Treg identity and function,and mediate th. switch.between effector T cells and Tregs.

关键词： Foxp3 specificity h.meostasis

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：