Understanding divergent domestication traits from the whole-genome sequencing of swamp- and river-buffalo populations

Domesticated buffaloes have been integral to rice-paddy agro-ecosystems for millennia, yet relatively little is known about the buffalo genomics. Here, we sequenced and assembled reference genomes for both swamp and river buffaloes and we re-sequenced 230 individuals (132 swamp buffaloes and 98 river buffaloes) sampled from across Asia and Europe. Beyond the many actionable insights that our study revealed about the domestication, basic physiology and breeding of buffalo, we made the striking discovery that the divergent domestication traits between swamp and river buffaloes can be explained with recent selections of genes on social behavior, digestion metabolism, strengths and milk production.     

Molecular design revitalizes the low-cost PTV-polymer for highly efficient organic solar cells

Developing photovoltaic materials with simple chemical structures and easy synthesis still remains a major challenge in the industrialization process of organic solar cells (OSCs). Herein, an ester substituted poly(thiophene vinylene) derivative, PTVT-T, was designed and synthesized in very few steps by adopting commercially available raw materials. The ester groups on the thiophene units enable PTVT-T to have a planar and stable conformation. Moreover, PTVT-T presents a wide absorption band and strong aggregation effect in solution, which are the key characteristics needed to realize high performance in non-fullerene-acceptor (NFA)-based OSCs. We then prepared OSCs by blending PTVT-T with three representative fullerene- and NF-based acceptors, PC₇₁BM, IT-4F and BTP-eC9. It was found that PTVT-T can work well with all the acceptors, showing great potential to match new emerging NFAs. Particularly, a remarkable power conversion efficiency of 16.20% is achieved in a PTVT-T:BTP-eC9-based device, which is the highest value among the counterparts based on PTV derivatives. This work demonstrates that PTVT-T shows great potential for the future commercialization of OSCs.     

高等职业院校青年教师朋辈互助体系研究

文章通过"高校青年教师压力源"问卷,对贵州省部分高职院校青年教师进行调查.通过研究,得出青年教师的压力主要来自于教学科研、家庭生活以及职业发展.文章研究提出通过建立朋辈互助体系可以有效地缓解青年教师的压力,促进青年教师健康发展.     

Han-Style Classical Dance Debuts in Beijing

From March 19th to 22nd, Beijing Dance Academy presented its grand-scale dance drama ＂Sorrows of the Tongque Stage＂ in PolyTheater in Beijing. The extraordinarily moving and unforgettable quality of this production lies in what have been called its ＂four extremes＂,     

书骨如山托厚重

清香四溢的茶坊茶室,是人间天堂杭州的遍地风景。氤氲茶气袅袅茶香织成的大雅氛围中,茶客们常会得见一款高悬于壁的“茶为国饮”的大字,就像一位明眸如水丰仪俊朗的君子,浑身上下透着中国文化韶秀不俗的厚重和潇洒。     

浪漫太阳岛

20多年前,著名歌唱家郑绪岚一首《太阳岛上》,把哈尔滨太阳岛的美名传遍了天下。太阳岛成为人们美好情怀的一种寄托。躲不开岁月的追忆,躲不开罗曼蒂克的怀恋,到了哈尔滨,就躲不开太阳岛。     

青铜蟠龙盘之谜

1984年3月17日,温岭县琛山乡莞渭童村村民童守根冒着早春的寒意,来到附近下望头山半山腰。他为父亲挖墓穴,挖着挖着,在挖至距地表约50厘米时,突觉碰到了坚硬的异物。顺势再挖,发现了一件巨大的青铜器,像个脸盆,全身布满精细的花纹,古色古香,更奇的是中间还雕着一个龙头,闻所未闻,见所未见。童守根不知道这是什么东西,     

知识管理在航空新产品开发中的应用研究/FONT

回顾了国内外关于知识管理理论及知识管理与新产品开发绩效关系方面的研究成果,提出了航空新产品开发中组织要素、知识管理活动和新产品开发绩效之间关系的概念模型和理论假设,基于对航空企业和科研院所的问卷调查数据进行了定量的实证研究。结果表明：知识管理活动的各维度对新产品开发绩效有显著影响;组织结构、组织文化对知识管理活动有显著影响,但IT工具对知识管理活动的影响则不显著,限制IT工具发挥作用的主要原因是其使用的不便利性;组织要素的各维度对新产品开发绩效有显著影响。这些研究结果可以为航空企业或科研院所在推进知识管理时应采取的策略提供有益的参考。     

重庆四面山常绿阔叶林群落的排序与环境解释

本文通过对重庆四面山常绿阔叶林群落的ＮＭＤＳ排序，研究了该区植物群落分布与环境之间的相互关系，并应用植物群落的排序值与环境因子的多元回归分析给出了植物群落类型与生态梯度的定量环境解释。结果表明：ＮＭＤＳ排序较好地反映了植物群落与环境的变异。四面山常绿阔叶林群落类型及分布主要取决于海拔高度和土壤含水量，并可通过与环境参数的回归模型定量地确定。     

中华鳖病毒及组织病理简报

于1994年广东斗门县一中华鳖（Trionyxsinensis）养殖场患红脖子病中华鳖和1996年广东东莞市一中华鳖养殖场患红底板和白底板病中华鳖中检测到3种病毒．红脖子病中华鳖检测到的病毒粒子吴杆状，具囊膜，大小103nm×（293～330）um，核衣壳大小69nm×（241～270）nm，于肠肌细胞质中复制、装配和成熟．在白底板中华鳖检测到的病毒粒子圆球形，无囊膜，直径70～75nm，于脾、肾和胃组织细胞质和细胞核中复制、装配和成熟．在红底板中华鳖肠细胞，检测到的病毒粒子直径85～90um，于肠细胞核中复制、装配和成熟．