Results 61 to 70 of about 6,735 (193)

Morphological Observation and Transcriptome Analysis During True-vivipary Development in Mangrove Kandelia obovata [PDF]

open access: yes, 2017
植物界中的胎生现象是指有性生殖产生的后代在母体上不经休眠或短暂休眠即萌发,以潮间带红树植物最为显著。虽然在形态结构、生理生化、生态适应等水平对红树植物的胎生现象已有所研究,但其涉及的分子机制仍未被阐明。本论文以我国广泛分布并具有重要生态学价值的显胎生红树代表物种秋茄(Kandeliaobovata)为研究材料,对从胚珠受精到胚轴掉落的一系列发育过程进行形态观察,确定具有转变性意义的阶段及组织,并对其中7个关键组织(受精后的胚胎、胚胎突出种皮前后的子叶及下胚轴 ...
周晓旋
core  

Plant–microbe interactions drive the rhizosphere microbial assembly and nitrogen cycling in a subtropical forest

open access: yesFunctional Ecology, Volume 39, Issue 5, Page 1274-1287, May 2025.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Interactions between plants and soil microorganisms in the rhizosphere are vital for maintaining the nutrient cycle and stability of terrestrial ecosystems. Nitrogen, closely related to carbon (C) cycling and ecosystem productivity, undergoes transformation by soil ...
Ru Wang   +9 more
wiley   +1 more source

南湖水体多相介质中PAHs的分布特征及其来源分析

open access: yesShuitu Baochi Xuebao, 2007
以南湖水体中的水、表层沉积物、生物膜和悬浮物为研究对象,对美国EPA规定的16种优控PAHs中13种PAHs的分布与富集特征进行了研究。结果表明,表层沉积物中检出12种PAHs,生物膜和水相中均检出11种PAHs,而悬浮物中只检出7种PAHs;生物膜和悬浮物富集PAHs的能力相近,比表层沉积物的富集能力大一个数量级;相关分析表明,生物膜和悬浮物富集PAHs的能力归因于其有机质(TOC)的含量高于表层沉积物中有机质的含量。根据菲/蒽比值和PAHs环数相对丰度对南湖表层沉积物中PAHs的来源进行了分析 ...
王晓丽   +5 more
doaj  

基于多数据集分析骨髓增生异常综合征相关的原发性免疫缺陷核心基因

open access: yesZhongguo shiyan zhenduanxue, 2023
目的 利用生物信息学方法探索骨髓增生异常综合征(MDS)发生发展机制,为筛选早期MDS辅助诊断指标提供理论依据。方法 选择来源于Gene Expression Omnibus数据库的人类MDS基因芯片或高通量转录组测序数据,利用R语言及相关包对数据集进行差异表达分析,采用STRING结合CytoHubba分析差异表达基因互作网络关系,并获取degree值前10的核心基因;利用GSEA对数据集进行通路富集,从而获取与显著富集通路相关的核心基因并评价其诊断效能。结果 本研究以正常组为对照 ...
连晓强, 张稳, 张栋栋, 穆红
doaj  

Allelic Imbalance in Four Tumor Types [PDF]

open access: yes, 2017
肿瘤是人最主要的致死性疾病,其发生发展过程中均伴随着大量的基因组改变。当同源染色体片段相对于另一条同源染色体的拷贝数增加或减少时,伴随着一个现象的发生,等位基因不平衡。如果被扩增的同源染色体的片段携带着比另一条同源染色体更有利于肿瘤生长的遗传变异位点,则此片段在肿瘤细胞生长过程中有选择性优势。高通量测序技术的快速应用与精准医疗研究的快速发展,产生了海量基因组学数据,现在我们可以较容易且准确的获得整个基因组的完整信息。本研究从一个独特的视角来探究四种高发肿瘤(乳腺腺癌、结直肠腺癌、肺腺癌和前列腺癌 ...
曾园媛
core  

Heavy metal pollution enhances pathogen resistance of an invasive plant species over its native congener

open access: yesFunctional Ecology, Volume 39, Issue 4, Page 1096-1111, April 2025.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Many invasive plant species have demonstrated a better ability to tolerate and accumulate heavy metals than their co‐occurring native plants. Given the potential biological toxicity of heavy metals to phytopathogens, we postulated that heavy metal contamination could ...
Tiantian Lin   +7 more
wiley   +1 more source

A social network analysis of an epistemic community studying neoliberal conservation

open access: yesConservation Biology, Volume 39, Issue 2, April 2025.
Abstract Researchers typically operate in epistemic communities: groups that share common approaches to research agendas and sociopolitical action and define areas of debate. Although productive in their own spheres, a lack of understanding among these communities can undermine scientific progress. Thus, analyzing epistemic communities is important for
Brittany Bunce   +5 more
wiley   +1 more source

Adaptive Root of Mangrove Plant Avicennia marina: Structure and Transcriptome Analyses [PDF]

open access: yes, 2017
红树林泛指生长在热带、亚热带地区河口或海岸潮间带的木本植物群落,是适应陆地与海洋过渡区域的一种特殊森林类型。白骨壤(Avicenniamarina)是红树林中常见的红树植物,是群落演替中的先锋物种。对于生长在滨海湿地相对低氧环境的白骨壤而言,其根系统对湿地环境有高度专业化的适应。根据白骨壤根结构生长位置和生长方向不同,将其分为四种根结构,分别为在地面下方水平生长且围绕树干延伸数米的水平根(Cableroot)、垂直于水平根向地下生长的锚定根(Anchorroot ...
郝赛琦
core  

Expression and biological characteristics of long non-coding RNA AL365181.2 in cholangiocarcinoma [PDF]

open access: yes
Objective To investigate the expression level of long non-coding RNA (lncRNA) AL365181.2 in cholangiocarcinoma (CHOL) and its effect on the functional characteristics of CHOL cells.
WANG Qinlei, SUN Zhaowei, GUO Jingyun, LI Haoran, FENG Yujie, ZHANG Bingyuan
core   +1 more source

基于代谢组学的食管鳞癌代谢特征与临床意义研究

open access: yesZhongshan Daxue xuebao. Yixue kexue ban, 2021
目的比较食管鳞癌患者和健康志愿者的血清代谢谱,寻找食管鳞癌特有的代谢标志物。方法选择一组明确诊断的食管鳞癌患者作为实验组、一组健康志愿者作为对照组,以液相色谱-质谱法(LC-MS)检测其血清轮廓代谢谱,通过单变量分析和多变量(主成分分析及偏最小二乘回归分析法等)比较两组代谢谱并寻找差异性代谢物,通过代谢物质通路的富集分析探讨其可能异常生物学过程。结果入组食管鳞癌患者20例为实验组,健康对照20例为对照组,变异倍数分析和T检验等单因素分析结果得出21种差异性代谢物(P<0.05);选择单变量分析P ...
黄伟钊   +5 more
doaj  

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