检索结果-南通市图书馆

Transgenic Poplar Plants for the Investigation of ABA-Dependent Salt and Drought Stress Adaptation in Trees

American Journal of Plant Sciences 2016年第9期7卷 1337-1356页

作者： Domenica Hamisch David Kaufholdt Jennifer-Christin Kuchernig Florian Bittner Ralf R. Mendel Robert Hänsch Jennifer Popko Institut für Pflanzenbiologie Technische Universitat Braunschweig Braunschweig Germany Albrecht-von-Haller-institutfür Pflanzenwissenschaften Abteilung Biochemie der Pflanzen Georg-August-Universitat Gottingen Germany

Important functions of the plant hormone abscisic acid (ABA) in stress reactions, growth and photosynthetic processes are extensively studied in the model plant Arabidopsis thaliana. This paper investigates the importance of Moco-sulphurase ABA3 and aldehyde oxidase (AO) on ABA-biosynthesis in Populus × canescens. ABA3 is essential for activation of the molybdenum enzymes AO and xanthine dehydrogenase (XDH). AO itself catalyzes the last step in ABA-biosynthesis. Generation of transgenic poplar plants altered in ABA3 and AO-activity using RNAi knock down and overexpression was performed. Whereas RNAi-AO plants show a specific loss of AO activity, the RNAi-ABA3 plants has a strongly reduced activity of both molybdenum enzymes: AO and XDH. Constructs of AO and ABA3-promoters fused to β-glucuronidase provide the basis to investigate transcriptional regulation of ABA-biosynthetic processes under stress conditions. Application of high salt concentrations and different drought stress intensities does change the endogenous AO or XDH neither on the side of transcription nor on protein activity. On phytohormone level however, water loss leads to increased ABA-amounts regardless of whether transgenic or wildtype plants are studied. Salt application resulted in higher ABA-levels in all analyzed plant lines. The down regulation of AO in the two different RNAi-plant lines strongly prevented a wildtype-like increase of ABA-levels. Whereas the WT plants accumulated up to 6000 ng ABA g-1 FW-1 after 16 h of salt stress exposure, plants of the RNAi lines revealed a markedly lower increase of only up to 2000 ng ABA g-1 FW-1. Opposing to these observations, ABA-levels increased during drought without any influence by the RNAi-effect. These results revealed that although stresses did not result in a visible increased AO-activity, ABA-production was influenced by AO and ABA3 at least under salinity.

关键词： ABA Biosynthesis Drought Stress Populus × canescens Transgenic Poplar Salt Stress

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

Fast Solvers of Fredholm Optimal Control Problems

引用

Numerical Mathematics(Theory,Methods and Applications) 2010年第4期3卷 431-448页

作者： Mario Annunziato Alfio Borzi Universita degli Studi di Salerno Dipartimento di Matematica e InformaticaVia Ponte Don Melillo84084 Fisciano(SA)Italia Universita degli Studi del Sannio Dipartimento e Facolta di IngegneriaPalazzo Dell'Aquila Bosco LucarelliCorso Garibaldi 10782100 BeneventoItalia institutfr Mathematik und Wissenschaftliches Rechnen Karl-Franzens-Universitt GrazHeinrichstr.368010 GrazAustria.

The formulation of optimal control problems governed by Fredholm integral equations of second kind and an efficient computational framework for solving these control problems is presented. Existence and uniqueness of optimal solutions is proved.A collective Gauss-Seidel scheme and a multigrid scheme are discussed. Optimal computational performance of these iterative schemes is proved by local Fourier analysis and demonstrated by results of numerical experiments.

关键词： Optimal control theory Fredholm integral equations of second kind iterative methods

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

双原子镧系化合物分子结构

引用

中国科学（B辑） 2001年第6期31卷 481-486页

作者：曹晓燕 M.Dolg 曹晓燕刘文剑 institutfür Physikalische & Theoretische Chemie 中山大学生物化学系广州510275 Lehrstuhlfür Theoretische Chemie Ruhr-University

利用相对论小芯赝势及新近优化得到的镧系元素的（14s13p10d8f6g）/[6s6p5d4f3g]价电子基组,对双原子镧系化合物（LaH,LaO,LaF,EuH,EuO,EuF,EuS,GdO,GdF,GdH,YbH,YbO,YbF,YbS,LuH,LuO,LuF）的分子结构进行了计算.除YbO,LuF分子外,其他分子的计算结果与现有实验值符合得很好.对YbO分子,在基态存在复杂的组态混合情况,由于计算方法（CI（SD））的局限性,导致理论值与实验值有较大差别.对LuF分子,则很可能从实验得到的分子结合能估计值太低了.

关键词：镧系元素相对论赝势价电子基组分子结构双原子镧系化合物基态分子结合能

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

QGP相变中的强子多重数分布与动力学起伏

引用

中国科学（A辑） 1999年第5期29卷 450-455页

作者：杨纯斌鄢文标蔡勖华中师范大学粒子物理研究所 institutfür-TheoretischePhysik FreieUniversittBerlin14195BerlinGermany

利用Ginzburg Landau模型研究了夸克强子相变中小间隔内的强子多重数分布 ,将多重数分布与有相同平均多重数的Poisson分布直接比较 ,定义分布的动力学因子dq 及其比值Dq≡dq/d1,发现了Dq 间的标度行为 ,该行为可用于判断夸克胶子等离... 详细信息

利用Ginzburg Landau模型研究了夸克强子相变中小间隔内的强子多重数分布 ,将多重数分布与有相同平均多重数的Poisson分布直接比较 ,定义分布的动力学因子dq 及其比值Dq≡dq/d1,发现了Dq 间的标度行为 ,该行为可用于判断夸克胶子等离子体是否形成 .

关键词：多重数分布 QGP 高能重离子碰撞相变强子

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

髋关节的影象诊断方法

引用

放射学实践 1990年第3期5卷 91-100页

作者： K.Lehner B.Pieper 李贵林 institutfür Rntgendiagnostik des Klinikum rechts der Isar Technische Universitt München 同济医科大学附属同济医院

现今之切面成象法及超声描记法在婴儿期髋关节疾病之诊断上已经取得很大进展。尽管有这种现代化的方法,但传统的诊断法仍是必不可少的,是放射学家日常工作的组成部分。

关键词：髋关节影象诊断

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

基质金属蛋白酶和细胞黏附因子与头颈部鳞癌转移的相关性研究

引用

中华耳鼻咽喉科杂志 2002年第4期37卷 313-315,T005页

作者：徐娅苹 Konard Sommer Pierre Moubayed Staphan Remmert 浙江大学医学院附属第二医院耳鼻咽喉科杭州310009 KlinikfürHals-NasenundOhrenheilkeilkunde KlinikfürHals-institutfürPathologie

头颈部鳞状细胞癌(简称鳞癌)是人类10大最常见的肿瘤之一，虽然肿瘤的诊断和治疗水平有很大的提高，但是肿瘤的转移和浸润仍是目前临床治疗的最大障碍。本研究通过显示基质金属蛋白酶(matrix metalloproteinase, MMP)-2、-9及其组织抑制... 详细信息

头颈部鳞状细胞癌(简称鳞癌)是人类10大最常见的肿瘤之一，虽然肿瘤的诊断和治疗水平有很大的提高，但是肿瘤的转移和浸润仍是目前临床治疗的最大障碍。本研究通过显示基质金属蛋白酶(matrix metalloproteinase, MMP)-2、-9及其组织抑制剂(tissue-inhibitor of matrix metalloproteinase, TIMP)-1，细胞黏附因子44变异体6(cell adhesion molecule 44 variant6, CD44v6)在头颈部鳞状细胞癌的表达，试图了解肿瘤转移和浸润的分子学机理。

关键词：基质金属蛋白酶细胞黏附因子头颈部鳞癌 MMP 癌转移相关性

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

Taxonomy and phylogeny of cercosporoid fungi（Mycosphaerellaceae） from China 1

Taxonomy and phylogeny of cercosporoid fungi（Mycosphaerella...

引用

中国菌物学会2016年学术年会

作者： ZUCHEN LIU UWE BRAUN PEDRO W.CROUS YING ZHANG Zu Chen Liu Uwe Braun Pedro W.Crous Ying Zhang Institute of Microbiology Beijing Forestry University Martin-Luther-Universit?t Institutfür BiologieBereich Geobotanik und Botanischer Garten CBS-KNAW Fungal Biodiversity Centre

Cercosporoid fungiinclude a large number of mostly plant pathogenic fungi with a wide geographic distribution,being usually associated with leaf spots on a broad range of plant *** we initiate a series of studies on Chinese cercosporoid fungi,focussing on the identification of some common,rare and new plant diseases caused by these leaf-spotting *** aim of the series is to resolve the taxonomy and DNA phylogeny of this important group of phytopathogens in *** this study,nineisolates of cercosporoid fungi were collected from five host *** nucleotide sequence data of four gene loci（ITS,LSU,TUB and tef1-αr DNA） were generated for all *** on morphological characters in vivo and in vitro and phylogenetic data,a new species,Pseudocercosporapauciseptata（on living leaves of Pyracanthafortuneana）,is introduced including a detailed description,illustration and comparison with similar *** addition,Passaloracircumscissa,Pseudocercosporacercidis-chinensis,***,and *** are described,illustrated and phylogenetically *** a new host record for Passaloracircumscissa in China,while Linderareflexais a new host for ***.

关键词： Asia fungal diversity hyphomycetes Passalora Pseudocercospora

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

蛇根木细胞悬浮培养进行紫杉醇的生物转化

引用

Acta Botanica Sinica 2004年第11期46卷 1383-1386页

作者：赵昱于荣敏 CorneliaSCHROEDER IanSADLER MatthiasUNGER 孙先凤 DavidW.H.RANKIN JoachimSToeCKIGT 浙江大学药学院，杭州310031 暨南大学药学院，广州510632 LehrstuhlfürPharmazeutischeBiologie InstitutfürPharmazieJohannesGutenberg-UniversitaetMainzD-55099MainzGermany DepartmentofChemistry TheUniversityofEdinburghEdinburghEH93JJU.K.

通过理化及光谱学方法，从蛇根木(Rauwolfia serpentina(L.)*** Kurz．)悬浮细胞内分离到3个紫杉醇同系物，高分辨。H-NMR和MS结构分析表明，它们分别为10-脱乙酰紫杉醇、baccatinⅢ和10-deacetylbaccatinⅢ。本实验未检测出紫杉醇的苷... 详细信息

通过理化及光谱学方法，从蛇根木(Rauwolfia serpentina(L.)*** Kurz．)悬浮细胞内分离到3个紫杉醇同系物，高分辨。H-NMR和MS结构分析表明，它们分别为10-脱乙酰紫杉醇、baccatinⅢ和10-deacetylbaccatinⅢ。本实验未检测出紫杉醇的苷化或羟基化衍生物。

关键词：生物转化蛇根木细胞培养紫杉醇紫杉烷类

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

Mining and geological knowledge during the Neolithic： a geological study on the variscite mines at Gavà, Catalonia

引用

Episodes 2003年第4期26卷 295-301页

作者： AntoniCamprublí Joan-CariesMelgarejo JoaquínA.Proenza FidelCosta JosepBosch AlíciaEstrada FerranBorell NikolaiP.Yushkin ValentinL.Andreichev CentrodeGeociencias UniversidadNacionalAut6nomadeM6xico.CarreteraQro.-S.L.P.km15.5CampusUNAM-Juriquilla76230SantiagodeQuerétaroMexico DepartamentdeCristal.lografia MineralogiaiDipbsitsMinerals.FacultatdeGeologia.UniversitatdeBarcelona.MartfiFranquèss／n08028Barcelona（Catalonia）Spain institutfürGeologie MineralogieundGeophysikRuhr-UniversitǎtBochum44780BochumGermany MuseudeGave PlaàaDolorsClua13-1408850Gavà（Catalonia）Spain InstituteofGeology KomiScienceCentreRussianAcademyofSciencesUralDivision.54PervomaiskayaSt.167610Syktyvkar（KomiRep.）RussianFederation

The Gavd Neolithic Mining Complex (GNMC) near Barcelona was active during the Neolithic age, since ca. 6000 BP until about 700 years after. These mines show up to five different underground mining levels, developed as galleries and chambers, communicated through pits, drawing a complex network with a total known length of over 1000 m. These are some of the oldest underground mines in Europe but, contrary to the rest of the mine workings known of the same epoch, this is the only mining complex reported to date whose aim was not mining for conventional substances for the epoch such as chert, ochre or copper. The main aim of the GNMC was variscite, a green phosphate mineral similar to turquoise that can be easily cut and polished to make ornaments such as necklaces or bracelets. This paper is focused mainly on the geological mapping and examination in surface and underground exposures of the different phosphate mineralization types(stratabound and veins) and other relevant geological features such as discordances, thrusts, faults, and folds.

关键词：采矿地质学磷铝石矿新石器时代巴塞罗那加太罗利亚

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

老年性黄斑病变患者的视功能和生活质量:Münster年龄及视网膜研究的结果

引用

世界核心医学期刊文摘(眼科学分册) 2006年第2期 53-54页

作者： Fuhs A Dasch B Behrens T. H.W. Hense 王静波 institutfü r Epidemiolog ie und Sozialmedizin Domagkstr. 3 48129 Mü nster Germany Dr.

Background: The aim of this study was to examine the association between increasing severity of age-related maculopathy (ARM) stages, visual function and quality of life. Methods: Using the 25- item version of the National Eye Institute Visual Function Questionnaire (NEI VFQ) in the Mü nster age and retina study (MARS), 974 patients (normal fundus: n=208; early ARM: n=466; late ARM: n=300) with bilateral gradable fundus photographswere asked about their visual function and quality of life. The NEI VFQ. scales with regard to general health, general vision, near vision, distance vision and peripheral vision were assessed. According to the ARMstages, age-and gender-adjusted mean scores were calculated and tested for statistically significant differences. Results: The perception of general health, general vision, near vision, distance vision and peripheral vision was getting worse with increasing severity of ARM stages. Comparing the maculopathy groups, significant differences in age and gender-adjusted mean scores were found between patients with late ARM and healthy subjects and patients with late and early ARM. Furthermore, we observed for the dimension general vision a significant difference of the mean score between early ARM and healthy control group [mean score; early ARM: 68.7 (0.7) vs. control group: 72.2 (1.1); p=0.005]. Conclusions: The results of the NEI VFQ reflect the clinical expectation of an inverse relation bevtween increasing severity ofARM stages and visual function and quality of life.

关键词：视功能老年性黄斑病变 nster 视网膜患者质量

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

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：