Results 21 to 30 of about 27,050 (210)
高变异Y染色体短串联重复片段检验体系的建立及对北方汉族群体调查
Zhongshan Daxue xuebao. Yixue kexue ban, 2021 目的建立一套五色荧光复合扩增体系，并调查中国北方汉族遗传多态性和父子家系突变情况。方法根据文献筛查出在中国某一群体中突变率为高变异和快速变异的Y-STR基因座，建立一套五色荧光Y-STR复合扩增体系，计算在500个北方汉族无关男性个体中的基因多样性，观察每个样本的Y-STR单倍型，并对中国北方汉族500个父子对进行检测，统计父子间的突变情况。结果成功构建了包含21个Y-STR基因座复合扩增检验体系，在北方汉族群体中基因多态性在0.402 3～0.990 4之间，500个无关个体中未发现有相同的单倍型 ...
李运丽 +6 more
doaj
The research of the detection of thalassaemia multiple mutations by next-generation sequencing technology [PDF]
, 2015 地中海贫血又称珠蛋白生成障碍性贫血，早期的病例来自地中海地区，故称为地中海贫血，是世界范围内影响最大的单基因病之一，遵循孟德尔遗传定律。该病是由珠蛋白基因的缺失或点突变所致，根据其变异的肽链可分为α地贫和β地贫。由于其基因缺陷的复杂、多样，使缺乏的珠蛋白链类型、数量、临床症状变异较大。临床上对中、重度地中海贫血无行之有效的治疗方法，给社会、家庭、个人带来了沉重的经济及精神负担。故有效检出地中海贫血患者、进行婚前孕前指导、产前诊断、避免地中海贫血患儿的出生，有着极其重要的社会意义 ...
成明
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Justice in coexistence: Pastoralism and large carnivores on the Qinghai‐Tibet Plateau
People and Nature, EarlyView.Abstract The conflict between livestock husbandry and large carnivore conservation presents significant challenges in grassland ecosystems worldwide. Achieving sustainable coexistence among herders, livestock and large carnivores requires reconciling diverse perspectives and interests through equitable, inclusive and fair processes that address both ...
Yufang Gao, Yue Yu
wiley +1 more source
Identification of Rice Dwarf Mutant and Fine Mapping of mhd1 Gene [PDF]
, 2016 株高是水稻株型重要的组成因子，直接关系到水稻的产量，株高过高易引起植株倒伏导致减产，适当矮化则可以达到抗倒、增产的目的。虽然目前已经鉴定不少与水稻矮秆相关的基因，但是能够在生产上实际应用的矮秆主基因仍以sd1为主。因此，寻找和创造能在生产上利用的矮秆种质资源以及研究矮化相关机制具有重要的理论和实践意义。 本研究的材料源于籼稻品种闽恢3301经EMS诱变产生的小粒矮秆突变体，暂命名为mhd1（Minhui3301dwarf1）。mhd1表现出多个异常表型，包括植株矮化、叶片直立变宽、叶色深绿、穗和谷粒较小，
陈伟刚
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Rare Metals, EarlyView.ABSTRACT High‐entropy alloys (HEAs) have emerged as a transformative class of materials distinguished by their complex chemical compositions, unique microstructures, and remarkable mechanical and functional properties. Traditionally, the discovery and optimization of HEAs have relied on conventional methods, including trial‐and‐error experimentation ...
Chrispin Ouko Zamzu +2 more
wiley +1 more source
Rare Metals, EarlyView.ABSTRACT Organic‐inorganic hybrid perovskites (OIHPs) with white‐light emission have significant potential in solid‐state lighting and display due to the designable structure and excellent luminescent properties. However, OIHPs are prone to damage during bending due to the brittleness of crystals, which limits their application in the field of flexible
Jinyu Xu +8 more
wiley +1 more source
Function of SAV6 in Maintenance of Genome Integrity and Root Development in Arabidopsis [PDF]
, 2015 flap核酸内切酶FEN1（flapendonuclease1）是RAD2家族的一种能够识别特异底物结构的核酶。FEN1具有三种酶活性：flap核酸内切酶（FlapEndonuclease,FEN）活性、5’核酸外切酶（5’-Exonuclease,EXO）活性和缺口依赖的核酸内切酶（GapEndonuclease,GEN）活性，在DNA复制、修复以及维持端粒稳定性等方面发挥着重要作用。人们对FEN1在哺乳动物、酵母中的功能已经有了深入了解，但是拟南芥中尚无相关研究 ...
张益娟
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Devouring the Invaders: The Racial‐Ecological Politics of the Chinese Crayfish Trade in Kenya
American Anthropologist, EarlyView.ABSTRACT This article examines entanglements of ecology, race, and foodways at Lake Naivasha in Kenya. Nonnative Louisiana red swamp crayfish (Procambarus clarkii), first introduced to Kenya in the 1960s, were once viewed as invasive but are now sought after as a delicacy among Kenya's Chinese community.
Amanda Kaminsky
wiley +1 more source
Mechanistic study of TREM2 mutations in increasing the risk of neurodegenerative diseases [PDF]
, 2016 2型髓系细胞触发受体（Triggeringreceptorexpressedonmyeliodcells2，TREM2）是中枢神经系统（centralnervoussystem，CNS）中主要表达于小胶质细胞表面并参与机体固有免疫的一种受体蛋白，与其接头蛋白酪氨酸激酶结合蛋白（DNAXactivatingproteinof12kDa，DAP12）形成TREM2/DAP12复合物，从而调节小胶质细胞中的炎症反应和吞噬功能。TREM2属于Ⅰ型跨膜蛋白，其胞外段经过蛋白酶切割后产生可溶形式TREM2 ...
王哲
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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