Results 131 to 140 of about 29,642 (234)
Hobbyist preferences for pet freshwater turtles
Conservation Biology, EarlyView.Abstract The burgeoning pet trade is a primary threat to wild freshwater turtles worldwide. Although the risks from commercial exploitation of turtles have been discussed widely, there is little empirical research on preferences for pet turtles from a hobbyists’ perspective.
Jingjing Zhao +7 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2014 有研究表明,骨质疏松症发病与多种因素有关,与年龄、性别、种族、体重指数、糖尿病、甲亢等有关,随着对骨质疏松症发病机制的深入研究,高血压病与骨质疏松的关系正受到越来越多的关注,成为近年来的研究热点。本研究旨在探讨原发性高血压与骨密度及骨代谢失调的相关性,以进一步阐明原发性高血压患者骨质疏松的发病机制。1资料与方法1 ...
刘颖, 宋成伟, 杜以武
doaj
The study of AKAP95 and Cx43 protein co-regulating cell G1/S phase transition [PDF]
, 2016 本研究分为两部分，第一部分采用免疫组织化学实验，包括肺癌组织中AKAP95和CyclinD3、Akt蛋白表达与临床病理学指标的关系及3种蛋白之间的关联性分析、直肠癌组织中AKAP95、CyclinD1、CyclinE1和Cx43蛋白的关联性分析。通过检测51例肺癌组织和15例癌旁组织中细胞周期蛋白D3(CyclinD3)、蛋白激酶A锚定蛋白95(AKAP95)和丝/苏氨酸激酶(serine/threoninekinase，Akt，亦称蛋白激酶B，PKB)的表达发现，AKAP95 ...
原阳阳
core
Evaluating past and future contributions of conservation programs to species recovery
Conservation Biology, EarlyView.Abstract Impact evaluation of conservation actions is a crucial step in global efforts to curb the biodiversity crisis. Through robust impact evaluation, practitioners can assess the effectiveness of conservation strategies and optimize the use of limited resources.
Rebeca E. Young +10 more
wiley +1 more source
Dianci bileiqi, 1994 电瓷工艺装备设计分析与研究（十一）鲁延宾（西安电瓷研究所西安７１００７７）第十一章切割倒角研磨和胶装工艺装备设计分析与研究切割倒角、研磨、胶装和装配是电瓷制造的关键工序之一。高精度的工装和高净化的装配工作环境，实现装配机械化和自动化，是提高电瓷制造水...
鲁延宾
doaj
Simvastatin inhibit glucose uptake through insulin receptor dependent IRS1/PI3K/Akt pathway in mouse myotubes [PDF]
, 2015 他汀类药物是羟甲基戊二酸单酰辅酶A(3-hydroxy-3-methylglutaryl-CoA，HMG-CoA)还原酶抑制剂，可竞争性抑制内源性胆固醇的合成。大量研究表明长期服用他汀类药物可增加新发糖尿病的发病风险，但具体机制尚不清楚。 本实验使用辛伐他汀及胆固醇代谢中间产物甲羟戊酸内酯干预小鼠骨骼肌细胞(由小鼠成肌细胞C2C12细胞分化而来)，采用免疫印迹法（immunoblotting）、流式细胞术、细胞毒性试验和葡萄糖消耗试验，研究辛伐他汀和甲羟戊酸内酯对骨骼肌细胞葡萄糖代谢的影响及其作用机制 ...
梁晓静
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Conservation Biology, EarlyView.Abstract Consumer demand for ivory perpetuates the unsustainable and illegal killing of African elephants and other wildlife species. Interventions that aim to change consumer behavior are increasingly recognized as a crucial element of demand management. However, poor design and implementation have limited their effectiveness.
Molly R. C. Brown +2 more
wiley +1 more source
Gaoya dianqi, 2015 随着柔性直流输电技术与大功率电力电子技术的发展,高压直流输电技术得到了不断地发展,而高压直流断路器已成为限制直流电网发展的主要瓶颈问题之一。现有的机械式高压直流断路器能够在几十ms内断开电路,但对于高压直流输电系统,远不能达到要求。采用高速电磁斥力机构作为机械开关的操动机构能够克服上述缺点。文中对以电磁斥力机构作为操动机构的强制过零型高压直流断路器的拓扑结构和工作原理进行了详细介绍,并针对其工作原理,提出控制需求,进而对其控制单元进行了研究。最后在自研的40.5 k ...
邵敏 +6 more
doaj
The study of chemical vapor deposition graphene growth mechanism based on isotope labelling technique [PDF]
, 2016 石墨烯是一种只由单个碳原子层构成的理想二维材料，自2004年首次被Novoselov等人采用胶带法从高定向热解石墨表面剥离出来后，其高电子迁移率，高热导，高硬度，高透光率等一系列独特优异的物理化学性质就不断被揭示，近十几年来一直保持着其研究热点的领先地位，同时还带动了其他二维层状材料的研究热潮。 目前石墨烯主要的制备方法分为以下四类：机械剥离法、氧化还原法、碳化硅外延法和化学气相沉积法；其中化学气相沉积法在生长高质量大面积石墨烯方面表现出很大的优势，尤其是在铜衬底上已获得30英寸的大尺寸单层石墨烯 ...
黎琼钰
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Comprehensive framework for assessing and optimizing existing research networks
Conservation Biology, EarlyView.Abstract Conservation, monitoring, and research networks, or collections of ecological research sites unified under a common mission of data collection or a research mission, are essential infrastructure for understanding large landscapes. However, most networks developed opportunistically over decades rather than through systematic design, creating ...
Alyson East +2 more
wiley +1 more source