Results 51 to 60 of about 24,580 (225)
Threats to and management of Natura 2000 protected areas relative to agricultural practices
Conservation Biology, EarlyView.Abstract The Natura 2000 (N2K) network combines biodiversity protection and socioeconomic targets. Human activities, such as agricultural practices, can affect biodiversity in N2K sites in diverse ways. Limiting activities with negative impacts while enforcing land management that supports biodiversity is crucial for effective conservation.
Giorgio Zavattoni +7 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2007 目的研究纤维蛋白原（Fg）Bβ基因多个位点的多态性与血浆水平及冠心病的关系。方法运用聚合酶链反应-限制性片段长度多态性分析技术及核苷酸序列测定鉴定FgBβ基因中7个可能与血栓相关的多态性位点:-β148C/T-、249 C/T3、45 C/T、-455G/A-、854 G/A、1689T/G及Bc1 I G/A;比浊法测定血浆纤维蛋白原水平。结果与正常对照组相比,冠心病组血浆Fg显著升高 ...
吴方 +6 more
doaj
拟行PCI术冠心病患者CYP2C19、ApoE基因多态性分布研究
Zhongguo shiyan zhenduanxue, 2021 目的研究拟行PCI术(percutaneous transluminal coronary intervention,经皮冠状动脉介入治疗)冠心病患者的CYP2C19、ApoE基因多态性的分布特点,并探讨基因多态性与血小板聚集率水平、血脂水平的关系。方法收集2019年1月至2019年5月于川北医学院附属医院心内科就诊的拟行PCI术的初诊冠心病患者,用PCR-微阵列芯片法检测CYP2C19基因多态性、实时荧光PCR法检测ApoE基因多态性、血小板聚集实验(比浊法)(ADP诱导)检测血小板聚集率 ...
喻晓倩 +5 more
doaj
, 2012 利用泥鳅(Misgurnus anguillicaudatus)的微卫星引物跨种扩增大鳞副泥鳅(Paramisgurnus dabryanus),通过家系扩增、PCR产物测序筛选出6个座位,用于大鳞副泥鳅7个野生群体的遗传结构分析。结果显示,群体的平均等位基因数在3.167～4.833,平均观测杂合度(Ho)在0.248～0.417,平均期望杂合度(He)在0.379～0.505,多个座位存在零等位基因、杂合子缺失现象,显示大鳞副泥鳅种群遗传多样性较低。采用UPGMA法对7个群体基于DA遗传距离进行聚类,
俞小牧, 游翠红, 童金苟
core
In vitro culture, cryopreservation, and field reintroduction of the endangered Mingan thistle
Conservation Biology, EarlyView.Abstract Current plant conservation efforts are hindered by, for example, poor seed germination, low viability, and insufficient propagation and preservation technologies. To address these problems, we devised an approach to plant conservation that integrates conservation, preservation, and restoration (CPR), which uses advanced in vitro techniques. We
Mukund R. Shukla +4 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2009 目的探讨胆固醇7α-羟化酶（cholesterol 7α-hydroxylase,CYP7A1）基因多态性与阿尔茨海默病（AD）的关系。方法用PCR-RFLP方法分析7α-羟化酶A-204C多态性。结果A-204C多态性基因型频率、等位基因A、C频率在组间比较差异无显著性（P>0.05）,但基因型为CC的AD患者,其TC和LDL-C水平显著高于基因型为AC的AD患者（P0.05）,但患者组CC基因型与TC、LDL-C水平密切相关 ...
赵朝贤 +8 more
doaj
Genetic diversity of Noctiluca scintillans [PDF]
, 2016 夜光藻是一种常见的赤潮藻，在世界大部分近海海域均有分布。目前普遍认为夜光藻只有一个种，但还没有研究探索不同地理种群的夜光藻是否产生了种内变异。本研究通过单细胞PCR以及单细胞克隆文库的方法，比较了中国黄海、东海、南海，墨西哥湾以及阿拉伯海5个海域夜光藻核糖体基因的遗传多样性。主要研究结果如下： 1、发现22种ITS单倍型(n=103)，12种28S单倍型(n=25)，6种18S单倍型(n=31)；这3个基因的单倍型多样度(Hd)分别为0.824、0.670、0.557，核苷酸多样度(π)分别为0 ...
潘永柏
core
Lessons from an eradication under multiple constraints of an island rat population of record density
Conservation Biology, EarlyView.Abstract Invasive rats threaten island biodiversity, disrupting ecosystems and endangering native species. Although rat eradication has succeeded on many islands, tropical islands present unique management challenges. Strict regulations and financial constraints on some tropical islands further limit proven eradication methods, complicating rodent ...
Tatiane Micheletti +7 more
wiley +1 more source
Studies on Biology of Early Developmental Stages of Babylonia [PDF]
, 2016 东风螺(Babylonia)隶属软体动物门(Mollusca)、腹足纲(Gastropoda)、新腹足目(Neogastropoda)、东风螺科(Babyloniidae)，分布于中国东海、南海以及东南亚、日本和印度洋沿岸，因肉质鲜美、市场接受度高，而且生长速度快、养殖产量大，被认为是本世纪最具开发前景的优质海产腹足类之一。方斑东风螺和泥东风螺是我国常见的东风螺种类，对于其早期发育阶段的形态学以及多种组学进行研究，不仅在理论研究上具有科学意义，而且在生产实践上也具有重要的指导意义 ...
沈铭辉
core +1 more source
A link between increased temperature and avian body condition in a logged tropical forest
Conservation Biology, EarlyView.Abstract The combined effects of anthropogenic disturbances, such as logging and climate change, remain poorly understood; yet, they are the main threats to tropical biodiversity. Most tropical African countries lack long‐term climate data, so climate impacts on biodiversity cannot be assessed.
Moreen Uwimbabazi +7 more
wiley +1 more source