Results 51 to 60 of about 11,427 (167)

Evolutionary and environmental determinants of heat tolerance and acclimation capacity in herpetofauna

open access: yesConservation Biology, Volume 40, Issue 1, February 2026.
Abstract Exploring heat tolerance and acclimation capacity can provide an effective approach to evaluating species’ sensitivity to extremely high temperatures due to climate warming. Despite some work on amphibian and reptile thermophysiological adaptation, related questions remain. We reviewed the literature to provide a synthesis of worldwide data on
Zijian Sun   +8 more
wiley   +1 more source

医学检验教育传承、创新、发展的探索与实践

open access: yesZhongguo shiyan zhenduanxue, 2012
1传统医学检验教育的特点1.1医学检验教育体系已经完善随着80年代初期(1982年)医学检验本科教育开始进入我们国家医学教育体系,经过三十余年的发展,我们国家的医学检验教育已经包括中专、大专(高职)、四(五)年制本科、七年制、硕士研究生、博士研究生、博士后流动站整体教育体系已经建立。已经完成了从医学检验向检验医学的过渡。目前 ...
张国军, 吕虹, 康熙雄
doaj  

非洲爪蟾短型肽聚糖识别蛋白基因的克隆与鉴定 [PDF]

open access: yes, 2010
采用生物信息学方法首次对非洲爪蟾短型肽聚糖识别蛋白(xePGRP-S)基因进行了克隆,并对其在胚胎发育和成年爪蟾各组织中的表达状况进行了分析。xePGRP-ScDNA全长720bp,开放阅读框为549bp,编码182个氨基酸。序列比对显示xePGRP-S与其他物种PGRP-S的序列相似性在42.4%—50.5%之间。RT-PCR显示在非洲爪蟾胚胎发育至3d时可以明显检测到xePGRP-S的表达,之后呈持续性表达,且在所检测的心、肝、脾、肺、肾 ...
昌鸣先   +4 more
core  

Macroeconomic and Sectoral Determinants of Alternative Infrastructure Funding Models in Ghana: A Dynamic Time‐Series Analysis

open access: yesJournal of Critical Infrastructure Policy, Volume 7, Issue 1, Spring/Summer 2026.
ABSTRACT Ghana faces a persistent infrastructure financing gap, prompting the exploration of alternative funding models such as Public–Private Partnerships (PPPs), green bonds, and blended finance instruments. This study uses macroeconomic and sectoral indicators as proxies to evaluate the long‐term impact of these models on economic performance in ...
Samuel Kojo Aidoo   +1 more
wiley   +1 more source

大鸨生殖系统形态结构初步研究

open access: yes野生动物学报, 2007
通过对7只不同年龄♂♀体大鸨生殖系统的形态结构解剖发现:大鸨雄性生殖系统由睾丸、附睾、输精管和交配器组成,无真正的阴茎,而具有阴茎体。睾丸一对,黑色、长形、豆状,右侧在前,左侧睾丸略大于右侧。大鸨睾丸从孵化出壳到性成熟无颜色变化,只是体积和重量增长。附睾在幼年时不明显,而在成体发情期时显著,呈前端较大的纺锤形。输精管外观为半透明、黑色弯曲的线状,沿输尿管向后延伸至泄殖腔壁形成突起,即输精管乳头;雌性生殖系统由卵巢和输卵管组成。卵巢和输卵管仅左侧正常发育,右侧输卵管退化为—短白色盲管 ...
郭玉荣   +3 more
doaj  

Identification of the Deltamethrin-degrading Bacteria from Ocean Sediments and its Degrading Enzyme’s Purification and Characterization [PDF]

open access: yes, 2009
本论文着眼于对从海洋沉积物中筛选的溴氰菊酯降解菌菌株的鉴定;通过对高产酶菌株摇瓶培养基的优化,获得该菌株的最适培养基;在此基础上,对菌株产酶的酶液进行纯化,为降解酶的酶学研究做初步的准备。 首先研究了采用PCR技术进行溴氰菊酯降解菌P1-1-B8菌株的鉴定。通过革兰氏染色和16SrDNA测序,构建系统发育树,分析结果为:革兰氏阴性,P1-1-B8菌株的16SrDNA基因序列和PseudomonasxanthomarinaKMM1447(T)菌株的16SrDNA基因序列具有最大相似性,同源性达99 ...
刘丽花
core  

Conservation grounded in traditional ecological knowledge, culture and hunting

open access: yesPeople and Nature, Volume 8, Issue 1, Page 256-266, January 2026.
Abstract For millennia, traditional hunting practices have provided a means of subsistence for numerous indigenous peoples worldwide. Not only do managed traditional hunting practices perpetuate Traditional Ecological Knowledge (TEK), but they also promote the sustainable utilization of natural resources.
Wu Fei   +8 more
wiley   +1 more source

Genetic diversity on the Genus Skeletonema (Bacillariophyceae) in the coastal waters of China [PDF]

open access: yes, 2015
骨条藻(Skeletonema)是一类广泛分布于沿海水域的浮游硅藻,也是常见的赤潮生物。目前,对于整个中国沿海骨条藻的分类和分子生物学方面的研究,比较分散,还不能很好地回答我国沿海骨条藻的种类多样性和遗传多样性的问题。因此,本文选择我国沿海的代表性海区,进行周年采样,对分离培养的纯种株系,选择核糖体LSUnrDNA和ITS片段(5.8SrDNA及转录间隔区ITS1、ITS2)对其进行遗传多样性及系统进化分析,旨在从分子生物学方面分析我国沿海骨条藻属的种内、种间和地理株系间的差异,以及系统进化关系 ...
王琰
core  

环境内分泌干扰物与儿童发育相关神经系统疾病的研究进展

open access: yesZhongguo shiyan zhenduanxue
儿童期是神经系统发育关键期,易受环境因素影响。环境内分泌干扰物(EEDs)广泛存在,可经多种途径入体,生命早期暴露可增加儿童患神经系统疾病的风险。本文综述 EEDs 与儿童发育性神经系统疾病的关系,明确 EEDs 对儿童神经发育的危害,为疾病防控提供依据,为制定预防和干预策略提供理论支撑,保障儿童神经健康发育,为后续研究指引方向。
任能, 孙雨雷, 张波
doaj  

Isolation and phylogenetic analysis of halophilic, strictly anaerobic eubacteria S191(一株嗜盐严格厌氧细菌S191的分离与系统发育分析)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2009
采用Hungate滚管法,从东北太平洋结壳区深海沉积物中分离纯化得到中度嗜盐、严格厌氧发酵细菌S191,通过扩增及测定其16S rDNA基因序列,利用“Clustalx”和“Mega”软件对该序列作同源性分析及系统发育分析,建立了嗜盐严格厌氧细菌属的系统发育树,表明菌株S191的16S rDNA基因序列与Halanarobium属菌株的最高同源性为98.5%,革兰氏染色呈阴性、直杆状、0.3~0.6 µm ×1.8~3.0 µm、无运动、不产生芽孢,生长NaCl质量浓度为5%~25 ...
SHIKong-lan(石孔兰)   +3 more
doaj   +1 more source

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