Results 51 to 60 of about 11,680 (168)

Mating system, brood parasitism and extra-pair behaviour in the Chinese egret (Egretta eulophotes) basing on the microsatellite technology [PDF]

open access: yes, 2015
动物的婚配制度影响着个体的繁殖成功率,直接关系到群体的遗传多样性和种群动态的发展变化,是保护遗传学和生态学领域中非常重要的研究内容。已有学者野外观察到黄嘴白鹭(Egrettaeulophotes)存在婚外交配(EPC)行为,然而,有关黄嘴白鹭的婚配制度、EPC的产生机制以及其是否会导致婚外父权(EPP)现象还未清楚。此外,许多集群繁殖的鸟类都存在种内巢寄生(CBP)现象,而关于黄嘴白鹭巢寄生行为的研究也尚未开展。因此,本研究围绕黄嘴白鹭的婚配制度问题,主要开展以下几方面研究: (1)对3种非损伤性样品 ...
戴宇飞
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Staghorn Ferns in Botanical Gardens: Which Species Do We Really Cultivate or Trade? 植物园中的鹿角蕨:我们真正保育或买卖的是什么?

open access: yesIntegrative Conservation, Volume 4, Issue 3, Page 416-429, September 2025.
Staghorn ferns are among the most highly valued ornamental plants but several species experience major extinction threats. Here we establish a DNA barcoding reference dataset to support reliable identification of cultivated staghorn ferns to secure species identity of individuals at all life stages that are used in ex situ and in situ conservation of ...
Kaikai Wang   +6 more
wiley   +1 more source

Generation and Characterization of HCMV Specific Human Antibody to Explore Antibody Response Profile in HCMV Naturally Infected Individuals [PDF]

open access: yes, 2015
人巨细胞病毒(Humancytomegalovirus,HCMV)是一种常见的疱疹病毒,在人群中普遍感染,儿童感染率约为10%-40%,成人为50%-90%,大部分感染者为无临床症状的健康人。但机体免疫功能低下的人群如器官移植患者及AIDS病人,更易发生HCMV病毒的新发或复发感染,引起致命疾病如肺炎、肝炎、脑炎等,从而导致器官移植失败及术后死亡;同时HCMV病毒也是宫内感染中危害最大的病毒之一,感染率占怀孕妇女的0.5%-2%,尤其是在发展中国家较为常见,孕妇感染后自身多无明显症状或轻微症状 ...
夏琳
core  

External validation of QUiPP App in three independent European cohorts of symptomatic women

open access: yesUltrasound in Obstetrics &Gynecology, Volume 66, Issue 2, Page 163-174, August 2025.
ABSTRACT Objective To validate externally the QUantitative Innovation in Predicting Preterm birth (QUiPP) App v.2 for the prediction of spontaneous preterm birth (sPTB) in symptomatic women attending tertiary care in Europe. Methods The QUiPP App v.2 was validated in three independent datasets: a prospective European multicenter cohort across five ...
A. M. Fischer   +8 more
wiley   +1 more source

高分辨率熔解曲线法检测CBS基因SNP的技术优化

open access: yesZhongguo shiyan zhenduanxue, 2014
目的探索高分辨率熔解曲线法(high resolution melting,HRM)检测胱硫醚β-合酶(CBS)基因SNP位点所需的最佳反应体系和条件,建立快速高效的对CBS基因分型的方法。方法通过普通PCR初步确立引物的退火温度范围,在实时荧光定量PCR(qPCR)-HRM反应中调整确定最佳退火温度。对影响qPCR-HRM的因素包括反应程序、模板DNA、MgCl2再分别进行优化,确立最佳反应体系和反应条件,对在此基础上得出的基因分型结果通过测序验证其准确性 ...
于坤坤   +4 more
doaj  

雌性罗氏鼢鼠肠道微生物群落与功能预测的初步分析

open access: yes野生动物学报, 2021
罗氏鼢鼠(Myospalax rothschildi)是陕西南部农区主要害鼠,研究其与当地环境的相互作用对鼠害防控有重要意义。肠道微生物对宿主行为及生理的调控机制是近年来啮齿类动物防控研究新方向。本研究通过Illumina 高通量测序技术,对雌性罗氏鼢鼠的盲肠样品进行 16S rRNA V3V4区的高通量测序,分析性别及食物因素对罗氏鼢鼠肠道细菌多样性的影响。结果显示,雌性罗氏鼢鼠的肠道内容物中的细菌隶属10门9纲11目13属。肠道革兰氏阳性厚壁菌门(Firmicutes)和革兰氏阴性菌类的变形菌门 ...
陈晓宁 封托 侯祥 安晓雷 王京 常罡
doaj  

Study on the distribution and diversity of nanoflagellate in the Yangtze estuary and continental shelf of East China Sea [PDF]

open access: yes, 2015
本研究应用荧光显微技术、荧光标记颗粒示踪法以及Illumina高通量测序技术,分别于2013年春季、2013年夏季和2013年秋季开展了对长江口及东海陆架区微型鞭毛虫的丰度分布、异养细菌的摄食和群落多样性的研究,并初步探讨了影响微型鞭毛虫分布、摄食和群落多样性的因素。主要结果如下: (1)长江口及东海陆架区微型鞭毛虫的丰度变化范围为0.41-7.15×103cellsml-1,微型鞭毛虫丰度的最高值出现在夏季,最低值出现在秋季,表现出明显的季节变化特征 ...
吴林南
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Simple sequence repeats and their expansions: role in plant development, environmental response and adaptation

open access: yesNew Phytologist, Volume 247, Issue 2, Page 504-517, July 2025.
Summary Repetitive DNA is a feature of all organisms, ranging from archaea and plants to humans. DNA repeats can be seen both in coding and in noncoding regions of the genome. Due to the recurring nature of the sequences, simple DNA repeats tend to be more prone to errors during replication and repair, resulting in variability in their unit length ...
Sridevi Sureshkumar   +3 more
wiley   +1 more source

小黄鱼jnk1jnk2基因克隆及响应高温应激的表达特征分析

open access: yesHaiyang yu huzhao
JNKs (c-Jun氨基末端激酶)具有调节细胞凋亡的功能,可对多种细胞外信号刺激产生反应。为研究高温对小黄鱼(Larimichthys polyactis)肝脏细胞凋亡的调控机制,对细胞凋亡相关基因jnk进行研究。以NCBI中大黄鱼(Larimichthys crocea) jnk1和jnk2的CDS序列作为参照,克隆获得小黄鱼这两个基因的CDS序列。通过生物信息学分析,发现小黄鱼jnk1 ORF (开放阅读框)序列共1 155 bp,编码384个氨基酸;jnk2 ORF序列共1 263 bp ...
张 天乐   +7 more
doaj   +1 more source

Effects of hexabromocyclododecane (HBCD) on cardiac development in zebrafish embryos (Danio rerio): the mechanisms involved [PDF]

open access: yes, 2015
六溴环十二烷(1,2,5,6,9,10-Hexabromocyclododecane,HBCD)是被运用最广泛的阻燃剂之一,在全球的用量仅次于四溴双酚A和多溴联苯醚。HBCD具有持久性、生物累积性和生物放大效应,因而被定义为持久性有机污染物(persistentorganicpollutants,POPs)。已有研究表明HBCD具有发育毒性、神经毒性、内分泌毒性和生殖毒性,但对心脏发育毒性的研究十分有限,尤其缺乏对心脏发育毒性机制的研究。本研究以斑马鱼和H9C2细胞系为实验模型,采用低浓度HBCD(0 ...
吴美芳
core  

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