Results 51 to 60 of about 763,879 (236)
Scientists’ warning on the global destruction of rock outcrop ecosystems
Conservation Biology, EarlyView.Abstract Rock outcrops are geological formations that harbor a highly specialized biota adapted to harsh environmental conditions that differ from their surrounding landscapes. They are globally distributed, especially in old, highly weathered landscapes, and can function as habitat islands containing high levels of endemism and distinct evolutionary ...
Luiza F. A. de Paula +19 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2010 目的探讨大肠肿瘤p53和ki-ras基因协同突变的临床意义。方法采用免疫组化和PCR-SSCP方法,检测58例大肠肿瘤患者的良性病变、良性病变转为恶变、原发腺癌组织的p53基因、ki-ras基因的表达和突变情况。结果良性病变组与恶变组间的p53基因和Ki-ras基因的表达有显著差异,良性病变组与原发腺癌组的Ki-ras基因表达差异显著;良性病变组的p53基因与Ki-ras基因的表达呈负相关,而恶变组和原发腺癌组呈正相关。p53基因和ki-ras基因两种基因突变率无显著差异,而协同突变与淋巴结转移密切相关,
侯睿哲 +3 more
doaj
Institutional lessons from the Nordic management model
Conservation Biology, EarlyView.Abstract To improve wildlife management outcomes, in terms of reaching management goals and increasing legitimacy, Nordic countries have developed institutional systems involving stakeholders that aim for a more inclusive and participatory model.
Jens Nilsson +2 more
wiley +1 more source
IL-23R基因多态性与五邑地区汉族人群强直性脊柱炎的相关性分析
Zhongguo shiyan zhenduanxue, 2018 目的探讨中国五邑地区汉族人群中白细胞介素(interleukin,IL)-23R基因多态位点与强直性脊柱炎(ankylosing spondylitis,AS)发病的相关性。方法选取该地区汉族人群AS患者50例和同期健康体检者70名,采用Sequenom MassArray基因分型方法检测IL-23R基因多态位点,计算等位基因及基因型频率分布,并进行统计学分析。结果 rs10489629位点基因型频率和等位基因频率在两组间分布存在显著差异(χ2=11.392,P=0.003;χ2=13.435,P=0 ...
李秀娟 +5 more
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, 2016 一、产吲哚金黄杆菌基因组研究实验室前期工作筛选出一株产吲哚金黄杆菌(Chryseobacterium indologenes)具有较高的羽毛降解效率。羽毛是一种重要的动物蛋白，但自然环境下较难被降解，甚至污染环境；而降解羽毛可以变废为宝，用于加工动物饲料等方面。有文献报道的表现出较高羽毛降解效率的多为枯草芽孢杆菌，产吲哚金黄杆菌较为少见。本课题组对该株产吲哚金黄杆菌何以具有较高羽毛降解效率很感兴趣，开展了多个层次的研究，在生理生化研究的基础上，为深入研究其内在机理，又开展了其基因组、转录组相关研究 ...
丁彦强
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Conservation Biology, EarlyView.Abstract Ecological niche models (ENMs) are used to assess the abiotic preferences of species by linking their occurrences to the environmental conditions in which they live. We developed a fossil‐informed ENM framework that integrates mid‐Holocene and modern occurrences to test niche stability and reconstruct abiotic niche characteristics for four ...
Claire. M. Williams +3 more
wiley +1 more source
, 1992 通过有性繁殖转移人生长激素基因鲤鱼(P_1),获得了转基因鲤鱼的子一代(F_1)和子二代(F_2);外源基因在转基因P_1与普通鲤鱼杂交产生的F_1代和转基因F_1代自交产生的F_2代鱼中的存在率分别为45.4%和66.7%;外源基因拷贝数在子代个体之间存在很大差异,从每细胞2拷贝到每细胞200拷贝不等;外源基因在转基因鱼子代中仍可表达具有生物功能的产物,人生长激素(hGH ...
李国华 +7 more
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Psychometric framework for coexistence with large carnivores
Conservation Biology, EarlyView.Abstract Human–carnivore coexistence is essential for biodiversity conservation, yet measuring the attitudes and behaviors that support it remains methodologically challenging. We developed psychometric scales to assess willingness to coexist with carnivores and the underlying beliefs of this coexistence through an iterative expert elicitation process ...
Benjamin Ghasemi +14 more
wiley +1 more source
青稞B-hordein基因对小麦面粉加工特性的影响及新B-hordein基因的克隆
, 2014 B组醇溶蛋白（B-hordein）是大麦的主要贮藏蛋白之一，其种类、数量和分布是影响大麦酿造、食用及饲养品质的重要因素之一，与大麦营养品质和加工品质密切相关。B组醇溶蛋白的结构与小麦低分子量谷蛋白（low-moleculer-weight glutenin subunit, LMW-GS）相似，推测其对小麦品质具有类似LMW-GS的功能。 本研究以“转B-hordein基因小麦”高代品系和其受体材料为研究对象，初步分析青稞B-hordein对转基因小麦面粉加工特性的影响。同时，从野生大麦和青稞中克隆B ...
马兴芹
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