检索结果-南通市图书馆

Implication of Ions and Organic Solutes Accumulation in Amaranth (<i>Amaranthus cruentus</i>L.) Salinity Resistance

American Journal of Plant Sciences 2019年第12期10卷 2335-2353页

作者： Agapit Wouyou Hermann Prodjinoto Ahissou Séraphin Zanklan brigitte vanpee Stanley Lutts Christophe Bernard Gandonou Unité de Recherche sur l’Adaptation des Plantes aux Stress Abiotiques les Métabolites Secondaires et l’Amélioration des Productions Végétales Laboratoire de Physiologie Végétale et d’Etude des Stress Environnementaux Faculté des Sciences et Techniques (FAST/UAC) Tri Postal Cotonou Bénin Groupe de Recherche en Physiologie végétale Earth and Life Institute ELI-A Université Catholique de Louvain Louvain-La-Neuve Belgique

Salinity is one of the major environmental constraints limiting agricultural productivity in the world. The effects of salt stress on growth, ions and organic solutes accumulation were investigated in two amaranth (Amaranthus cruentus) cultivars: Rouge (salt-resistant) and Locale (salt-sensitive). Young plants of these cultivars were exposed, in hydroponic system, to three concentrations of NaCl: 0, 30 and 90 mM. Growth parameters, ions, free proline and soluble sugars concentrations were determined after 2 weeks of stress. NaCl effect resulted in plant growth reduction in both cultivars but plants of cultivar Rouge were less affected compared to that of cv. Locale. Na+, proline and soluble sugars concentrations increased significantly in leaves and roots under salinity while K+, Ca2+ and Mg2+ concentrations decreased in both cultivars. Proline and soluble sugars increased significantly in leaves and roots of cultivar Locale whereas in cultivar Rouge, proline increase was significant only in roots and soluble sugars increase was significant only in leaves. The highest increase of Na+ concentration occurred in leaves of cv. Rouge coupled with the lowest reduction in K+ concentration. The highest increase of proline occurred in leaves of cultivar Locale whereas the highest increase of soluble sugars was observed in leaves of cultivar Rouge. The reduction of the Ca2+ concentration under salt stress was more accentuated in both leaves and roots of cultivar Rouge than cultivar Locale while cv. Rouge maintained higher content in Mg2+ either in leaves or in roots in the presence of NaCl than cultivar Locale. These results suggest an implication of Na+, K+ and Mg2+ in salt resistance in these cultivars and that soluble sugars may play an important role in salt-resistance in Amaranthus cruentus. However, proline appears as a symptom of injury in stressed plants rather than an indicator of resistance.

关键词： Growth Ions Concentration Osmolytes Accumulation Amaranthus cruentus Salt-Resistance Mechanism

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

First ovules integument: what roles?

引用

National Science Review 2022年第4期9卷 21-22页

作者： brigitte Meyer-Berthaud AMAP Universit ?e de MontpellierCNRSCIRADINRAEIRD

The Famennian is a period of increased taxonomic diversity for the first representatives of the major plant groups,especially the spermatophytes (*** seed plants) that,today,represent the most abundant and diversified plant group on Earth [1,2].Early spermatophytes evolved a unique ovule-centered reproductive syndrome that allowed them to germinate and grow rapidly in disturbed habitats and,secondarily,to colonize dry habitats unfavorable to the reproduction of their free-sporing predecessors [3,4](Fig.1).In these ovulate organisms,the female gametophyte grows and produces gametes inside the indehiscent megasporangium (nucellus) that differentiates a pollen chamber retaining the pollen grains in its apical *** integument encloses the *** the Runcaria protovule that preceded them by 20 million years,Famennian ovules were all surrounded by a cupule,except perhaps Spermolithus and Warsteinia [5-7].

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

Perturbation and delayed recovery of the reed invertebrate assemblage in Camargue marshes sprayed with Bacillus thuringiensis israelensis

引用

Insect Science 2018年第4期25卷 542-548页

作者： brigitte Poulin Gaetan Lefebvre Tour du Valat Research Institute Le Sambuc Aries France

Bacillus thuringiensis var. israelensis （Bti） is the most commonly used larvicide to control mosquitoes worldwide. Considered as nontoxic to most organisms, Bti can nevertheless cause trophic perturbations to natural communities by reducing the abundance of Chironomidae, which are a key element of wetland food webs. Since August 2006, up to 8400 of the 33 000 ha of mosquito larval biotopes in the Camargue （Rh6ne delta, in southern France）, are monitored by a public agency and Bti-sprayed （aqueous solution of VectoBac 12AS at 2.5 L/ha） whenever mosquito larvae （Ochlerotatus easpius and Oc. detritus） appeared in water bodies. This resulted in 30-50 aerial treatments/year, in addition to ground spraying of unknown frequency. The sprayed habitats include Phragmites australis reedbeds, which support a specific avifauna of conservation concern. We compared the abundance of invertebrate prey available to passerine birds at treated and control sites relative to the predicted values based on hydrology over a 9-year period. Food available to reed passerines was significantly reduced at treated areas, translating into a 34% decrease in breeding birds based on predictive modeling. The most affected arthropods were Diptera, Aranaea, Coleoptera, and Hymenoptera. No cumulative effects were observed over time, but the recovery of the invertebrate assemblage after the cessation of mosquito control was delayed due to Bti spore persistence and proliferation in the sediments. While hydrology remains a prime factor influencing primary and secondary productivity of the Camargue reed marshes, Bti spraying had significant negative effects on animal communities at several trophic levels.

关键词： Camargue insecticide impact mosquito control Phragmites australis marsh trophic interactions wetland conservation

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

Analyzing the Reliability of Degradable Networks

引用

Journal of Computer Science & Technology 1993年第1期8卷 77-86页

作者：史维更 brigitte Servatius Thinking Machines Corporation 245 First StreetCombridgeMA 02142-1264U.S.A. Departrnent of Mathematical Sciences Worcester Polytechnic InstituteWorcesterMA 01609U.S.A.

The reachability of a strongly connected network may be destroyed after link *** many networds have directed links with the potential for reversal,the reachabilty may be restored by reversing the direction of *** this... 详细信息

关键词： Network reliability degradable network network reconfiguradon fault tolerant system fault tolerant network strongly connected network

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

Fuzzy Models to Deal with Sensory Data in Food Industry

引用

Journal of Donghua University(English Edition) 2004年第3期21卷 43-48页

作者： Serge Guillaume brigitte Charnomordic Cemagref France INRA France

Sensory data are, due to the lack of an absolute reference, imprecise and uncertain data. Fuzzy logic can handle uncertainty and can be used in approximate reasoning. Automatic learning procedures allow to generate fuzzy reasoning rules from data including numerical and symbolic or sensory variables. We briefly present an induction method that was developed to extract qualitative knowledge from data samples. The induction process is run under interpretability constraints to ensure the fuzzy rules have a meaning for the human expert. We then study two applied problems in the food industry: sensory evaluation and process modeling.

关键词： sensory data fuzzy logic sensory evaluation

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

Regulation of hepatic blood flow:The hepatic arterial buffer response revisited

引用

World Journal of Gastroenterology 2010年第48期16卷 6046-6057页

作者： Christian Eipel Kerstin Abshagen brigitte Vollmar Institute for Experimental Surgery Medical FacultyUniversity of Rostock

The interest in the liver dates back to ancient times when it was considered to be the seat of life processes. The liver is indeed essential to life,not only due to its complex functions in biosynthesis,metabolism and clearance,but also its dramatic role as the blood volume reservoir. Among parenchymal organs,blood flow to the liver is unique due to the dual supply from the portal vein and the hepatic artery. Knowledge of the mutual communication of both the hepatic artery and the portal vein is essential to understand hepatic physiology and pathophysiology. To distinguish the individual importance of each of these inflows in normal and abnormal states is still a challenging task and the subject of on-going research. A central mechanism that controls and allows constancy of hepatic blood flow is the hepatic arterial buffer response. The current paper reviews the relevance of this intimate hepatic blood flow regulatory system in health and disease. We exclusively focus on the endogenous interrelationship between the hepatic arterial and portal venous inflow circuits in liver resection and transplantation,as well as inflammatory and chronic liver diseases. We do not consider the hepatic microvascular anatomy,as this has been the subject of another recent review.

关键词： Hepatic blood flow Hepatic arterial buffer response Liver

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

Improving the Reliability of Computer Communication Networks

引用

Journal of Computer Science & Technology 1991年第3期6卷 230-242页

作者：史维更 brigitte Servatius Department of Electrical Engineering Department of Mathematical Science Worcester Polytechnic InstituteWorcesterMA 01609U.S.A.

For networks that are directed or can be represented by a directed network,reversing one or more of the uni-directional links may provide the ability to reconnect a network that has been disconnected by link failure, In this paper,a new approach to reconfigure such networks is *** develop a linear time algorithm which,when reachability has been destroyed by the removal of a single link,optimally restores teachability through the reversal of selected ***-link failure reconnectability is discussed and an algorithm with polynomial complexity is given which provides a nearly optimum solution to reconnect the *** show that the reliability of a network that allows reversals is at least twice more than that in which reversals are not ***,the reconnection of some networks cannot be ***,we discuss the maximization of reachability of such networks so that each node can reach maximum number of the other nodes.

关键词： link work net Improving the Reliability of Computer Communication Networks

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

A critical review of policies and legislation protecting Tanzanian wetlands

引用

Ecosystem Health and Sustainability 2018年第12期4卷 2-12页

作者： Silvia Francis Materu brigitte Urban Susanne Heise Department of Biosciences Solomon Mahlangu College of Science and EducationSokoine University of AgricultureMorogoroTanzania Institute of Ecology Faculty of Sustainability SciencesLeuphana University of LüneburgLüneburgGermany Faculty of Life sciences Hamburg University of Applied SciencesHamburgGermany

Introduction:The benefit of wetlands for reducing poverty depends on the effectiveness of governance systems that influence peoples’behaviour in the wise use of ***:This article critically analyses the current poverty reduction strategies,agrarian policies and economic investments governing wetland usage,especially in Tanzania,with regard to their impact on sustainable Ramsar wetlands ***:It analyses the management structure,domestic policies and legal framework relating to the protection of wetlands in Tanzania in accordance to the wise use concept of the Ramsar ***:Tanzanian legal provisions for wetland protection are uncoordinated and too limited in their coverage and scope to sufficiently address the destruction of wetland *** is no comprehensive national legal framework to guide sustainable management of Ramsar wetlands in Tanzania as laid out by the Ramsar Convention,which the country ratified in the year ***:Without a sound legislative and policy-making framework,Tanzanian wetlands and their diverse ecosystem services will continue to degenerate with current strategies of increasing agribusiness and other developmental projects or economic *** paper provides critical baseline information to inform decision makers to develop appropriate policy and laws,which promote the wise use of wetlands in Tanzania.

关键词： Economic investments poverty reduction wetland ecosystems Ramsar Sites legal frameworks sustainability

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

Nonstandard finite-difference schemes for the two-level Bloch model

引用

International Journal of Modeling, Simulation, and Scientific Computing 2018年第4期9卷 186-208页

作者： Marc E.Songolo brigitte Bidegaray-Fesquet Departement de Mathematiques et Informatique Universit´e de Lubumbashi 1825 Lubumbashi Republique Democratique du Congo Univ.Grenoble Alpes Grenoble INP LJK38000 GrenobleFrance

In this paper, we present splitting schemes for the two-level Bloch model. After proposing two ways to split the Bloch equation, we show that it is possible in each case togenerate exact numerical solutions of the obtained sub-equations. These exact solutionsinvolve matrix exponentials which can be expensive to compute. Here, for 2×2 matriceswe develop equivalent formulations which reduce the computational cost. These splittingschemes are nonstandard ones and conserve all the physical properties (Hermicity, positiveness and trace) of Bloch equations. In addition, they are explicit, making effectivetheir implementation when coupled with the Maxwell’s equations.

关键词： Bloch equation exponential of a matrix exact finite-difference schemes nonstandard finite-difference schemes splitting method.

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

A novel post-transcriptional splicing form of the acute T cell leukemia proto-oncogene Lmo2

引用

Science China(Life Sciences) 2001年第6期44卷 561-569页

作者：朱天慧秦刚 brigitte Roye r-Pokora

Lmo2 is a T cell leukemia-related proto-oncogene, which belongs to the LIM protein family. Previous work has established its key role in yolk sac erythropoiesis and adult hematopoiesis, and it is also necessary for regulating angiogenesis. It has been demonstrated that this gene encodes a protein of 158 amino acids, consisting of two tandem cysteine-rich LIM domains, but the detailed mechanism of its transcriptional regulation remains to be elucidated. To further investigate the mechanism of transcriptional regulation of Lmo2, we combined SMART PCR technology with 5′RACE and found a novel post-transcriptional splicing form of Lmo2 in adult human kidney. This alternative transcript contains only two exons, encoding a smaller protein of 151 amino acids. Interestingly, it shares the same reading frame as the original Lmo2, but differs in 7 amino acids at the N-terminus. A genomic DNA fragment (from ?294 nts to +180 nts) containing the putative promoter region has been inserted into the luciferase reporter gene vector pGL3-basic and showed stable promoter activity when transfected into COS7. RT-PCR analysis revealed that this variant transcript was expressed widely in human tissues and cell lines, suggesting its potential basic functional importance.

关键词： Lmo2 transcript splicing form promoter activity RT-PCR.

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：