Results 31 to 40 of about 27,050 (210)
Genetic analysis and gene mapping of panicle branches stay-green trait in rice [PDF]
, 2016 水稻是重要的粮食作物之一，全球一半以上的人口以大米为主食。随着世界人口的增长，人们正面临着越来越严重的粮食危机。如何增加水稻产量一直是作物育种以及植物学研究的重要目标。近年来水稻遗传育种工作者发现了一些成熟期叶片的叶绿素不降解或仅少量降解而使叶片仍保持绿色的持绿型水稻品种，研究发现其叶片持绿性状多数属多基因控制的数量遗传，少数属隐性主效基因控制的质量性状遗传，相关基因大多已被鉴定及克隆。迄今为止，尚未见穗枝梗持绿性状的研究报道。佳辐占系本课题组育成的优质高产早稻品种，已在生产上大面积推广应用 ...
王永杰
core
Conservation Biology, EarlyView.Abstract Wildlife reintroductions are socioecological processes entailing the intentional movement of organisms by people. In animal reintroductions, there is growing recognition of the importance of human dimensions and efforts to integrate these into reintroduction projects. To conceptually reframe reintroductions as processes of renewed coexistence (
Roger Edward Auster +3 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2006 目的分析58例中国东北地区非综合征性耳聋（nonsyndromic hearing impairment,NSHI）患儿GJB2基因突变类型和频率。方法收集吉林省吉林市聋哑学校的58例非综合征性耳聋患儿（分别来自57个家庭）及37例听力正常家属的血样,经聚合酶链反应（polymerase chain reaction,PCR）扩增GJB2基因编码区,用酶切方法初步分析已知的233-235位点,进一步行DNA测序证实酶切结果并发现新的突变类型;同时对部分家属进行DNA测序 ...
于飞 +11 more
doaj
Functional analysis of Hedgehog gene in amphioxus embryogenesis and mutants construction related to the Hedgehog signaling pathway [PDF]
, 2015 Hedgehog（Hh）基因在动物胚胎发育过程中有着重要的作用，该基因最早在果蝇中发现，参与果蝇分节极性（segmentpolarity）的形成及翅原基前后组织中心的建立；在海胆中，参与中胚层的分化；而在脊椎动物中，该基因主要参与中枢神经系统（CNS）、轴旁中胚层及附肢的发育。在头索动物文昌鱼中，前人基于Hh的表达谱分析，推测该基因参与神经管的发育及左右轴的建立，提出Hh对神经管腹侧神经元分化的作用可能是一原始特征。 本文用基因敲低、过表达和敲除3种方法对文昌鱼Hh基因在胚胎发育中的功能做了进一步研究 ...
王慧
core
Automating the analysis of public saliency and attitudes toward biodiversity from digital media
Conservation Biology, EarlyView.Abstract Measuring public attitudes toward wildlife provides crucial insights into human relationships with nature and helps monitor progress toward Global Biodiversity Framework targets. Yet, conducting such assessments at a global scale presents challenges.
Noah Giebink +8 more
wiley +1 more source
Zhongshan Daxue xuebao. Yixue kexue ban, 1997 摘 要 为了解肝细胞癌(HCC)中p53 基因的突变情况, 收集86 例HCC 手术切除标本, 采用聚合酶链反 应-单链构象多态性(PCR/ SSCP)、聚合酶链反应-限制性片段长度多态性(PCR/ RFLP)和DNA 序列分析, 研 究了p53 基因的突变情况。86 例HCC 中, p53 基因的突变率为36 %, 其中, 密码子249 的突变率为33 .7 %, 1 例 SSCP 和RFLP 均提示密码子249 存在突变者经DNA 序列分析显示密码子249 的第三个碱基发生了AGG/Arg →
彭晓谋 彭文伟 周元平
doaj
From Clueless to Confident: How ChatGPT Transforms Academic Writing in Chinese as a Second Language
International Journal of Applied Linguistics, EarlyView.ABSTRACT Generative artificial intelligence (GenAI) has demonstrated its potential to enhance the quality of second‐language (L2) academic writing. This study used a qualitative approach comprising analysis of ChatGPT usage‐history screenshots, written assignments, and semi‐structured interview data on students’ use of GenAI in their L2 Chinese ...
Lanfang Sun +4 more
wiley +1 more source
Engineering Ferritin Nanoparticles for Theranostic Probes Development [PDF]
, 2016 疾病的诊断治疗学在近年来得到了巨大关注和广泛研究，以蛋白质为基础的纳米材料具有优异生物相容性、生物降解性、灵活的可修饰性等特点，在癌症的诊疗一体化研究上发挥着巨大作用。鉴于发展以蛋白质为核心的新型诊疗一体化探针具有重要的可应用和临床转化意义，我们在本论文中研究设计了多种以铁蛋白为核心的纳米材料，并着重探究了各种材料在诊疗一体化中的应用。主要内容概括如下： 第一章，我们简要介绍了肿瘤诊断治疗技术的发展和现状，着重探讨了肿瘤诊断治疗一体化的研究现状 ...
王占通
core
International Journal of Applied Linguistics, EarlyView.ABSTRACT Multilingual students in Anglophone universities often operate in survival mode. While translanguaging supports learning, critical gaps remain in understanding how translanguaging pedagogies transform and sustain motivation in English‐dominant contexts.
Melissa Jufenna Slamet, Julie Choi
wiley +1 more source
Powerful representation of the poor? German welfare associations' narrative advocacy during COVID‐19
Policy Studies Journal, EarlyView.Abstract The COVID‐19 pandemic sparked unprecedented experimentation in the German social assistance system, leading to changes previously considered impracticable by policymakers. This included a sanctions moratorium, easier access to benefits, and temporary cash transfers, all of which were advocated by welfare associations—key organized interests ...
Christopher Smith Ochoa
wiley +1 more source