Results 41 to 50 of about 6,735 (193)
Shuitu Baochi Xuebao, 2007 利用自然降雨影响下的农田为试验样地,分析了降雨前后土壤颗粒组成与养分含量的变化,探讨了流失泥沙颗粒组成与养分的变化特征。结果表明,在降雨后,西瓜地与油菜地表土颗粒组成呈现粘粒与粉粒含量减少,砂粒含量相对增加的趋势;土壤养分含量都有不同程度的下降,其中水解氮与速效磷下降的幅度很大,西瓜地与油菜地水解氮降雨后降幅分别为9.67%和7.99%,速效磷的降幅分别为9.20%和8.76%;全氮养分降幅很小,西瓜地与油菜地分别为2.17%和1.54%;流失泥沙细小颗粒含量与养分含量随时间基本都呈降低的变化趋势 ...
胡宏祥, 洪天求, 马友华, 刘坤
doaj +2 more sources
Mechanistic study on mercury or cadmium toxicity in marine copepod Tigriopus japonicus under multigenerational exposure [PDF]
, 2016 如今，海洋重金属污染已是最严峻的环境问题之一，会对海洋生态系统乃至人类造成巨大的危害，其中汞和镉是最有代表性的重金属，两者即使在低剂量下也会对海洋生物产生较高的毒性效应，而且会在生物体内累积并在食物链传递过程中有生物放大现象，最终威胁人类健康和生命安全。海洋桡足类日本虎斑猛水蚤（Tigriopusjaponicus），因其广泛的地理分布、相对短的世代周期、高的繁殖力、易于区分的雌雄形态及在海洋环境中重要的生态位等，已成为海洋生态毒理学研究的重要模式生物。因此本论文选取日本虎斑猛水蚤作为受试生物 ...
石琳
core
The Future of AI in the GCC Post‐NPM Landscape: A Comparative Analysis of Kuwait and the UAE
Politics &Policy, Volume 53, Issue 6, December 2025.ABSTRACT Comparative evidence of how two Gulf Cooperation Council (GCC) states translate artificial intelligence (AI) ambitions into post–New Public Management (post‐NPM) outcomes are scarce because most studies focus on Western democracies. To fill this gap, we examine constitutional, collective choice, and operational rules that shape AI uptake in ...
Mohammad Rashed Albous +2 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2020 目的研究长链非编码RNA(long non-coding RNA,lncRNA)预测头颈部鳞状细胞癌(head and neck squamous cell carcinoma,HNSC)患者预后的作用。方法下载癌症基因组图谱(The Cancer Genome Atlas,TCGA)数据库中HNSC的lncRNA表达数据,使用edgeR包分析HNSC样本中差异表达的lncRNAs。使用COX回归分析筛选预测预后的关键lncRNAs,使用Kaplan ...
向琳, 徐晓晨, 谭君武, 杜波
doaj
The role and mechanism of hnRNP A2/B1 in breast cancer [PDF]
, 2015 核不均一核糖核蛋白A2/B1（hnRNPA2/B1）是hnRNP蛋白家族成员，在肿瘤细胞增殖与凋亡过程中具有重要作用。本实验为了探究hnRNPA2/B1蛋白在乳腺癌组织中的表达及其在乳腺癌细胞中的定位。研究hnRNPA2/B1在乳腺癌细胞中所涉及的主要功能、信号通路以及可变剪接和蛋白融合过程，并探究hnRNPA2/B1对细胞增殖、凋亡、迁移等生物功能的影响。从而阐明hnRNPA2/B1在乳腺癌中的作用机制，为肿瘤的机理研究、临床诊断和治疗提供一个新靶点。本实验用免疫组化方法检测hnRNPA2 ...
韩荣
core
People and Nature, Volume 7, Issue 11, Page 2700-2713, November 2025.Abstract Large old trees are important ecological entities in human settlements, providing cultural values and ecological services that are threatened by current and future changes in global climate, land use and disturbance regimes. Some studies suggest incorporating social and cultural significance into the conservation of large old trees.
Zhuo Cheng +5 more
wiley +1 more source
Study on the Roles of Long Noncoding RNA HCAL in Hepatocellular Carcinoma [PDF]
, 2016 【背景】 原发性肝癌是最常见的恶性肿瘤之一，是我国发病率和死亡率均排名第二的恶性肿瘤。原发性肝癌中，大部分为肝细胞肝癌（简称肝癌）。虽然肝癌的诊断及手术切除、放化疗等治疗手段取得了很大的进步，但肝癌患者总体的生存率仍不理想。近年来，对肝癌的分子生物学机制进行了多方面的研究，并证实肝癌的发生发展伴随着一系列分子表达的失调及信号通路的异常。因此，从分子水平深入探讨肝癌发生发展及转移的机制，对寻找早期诊断、预测预后的生物标志物和治疗的分子靶点具有重要的临床意义。 长链非编码RNA ...
谢程融
core
Zhongshan Daxue xuebao. Yixue kexue ban, 2023 目的探讨suPAR在原发性FSGS患者足细胞损伤中的作用。方法①收集原发性FSGS患者（17 例）血清，以健康志愿者（10 例）及其他类型原发性肾病综合征患者（10 例）作为正常及疾病对照，采用ELISA检测suPAR水平；②采用suPAR体外刺激足细胞，收集细胞行流式细胞术分析细胞凋亡情况；收集细胞，提取RNA，行RNAseq；③足细胞RNAseq数据差异基因筛选，上下调基因行KEGG及GO通路富集分析，热图展示足细胞局部黏附、滤过膜、细胞骨架及内吞相关基因变化情况，并行qPCR验证 ...
胡浩强 +3 more
doaj
Deciphering the suppressive effects of CBX8 on prostate cancer cell invasion [PDF]
, 2023 Objective·To elucidate the regulatory mechanisms of the chromobox protein homolog 8 (CBX8) in prostate cancer metastasis from transcriptome and epigenetic modification perspectives.Methods·The correlation between the expression of CBX proteins and ...
LAO Yimin +3 more
core +1 more source
Institutional Legacies and Governance Models: A Comparative Study of Broadband State Aid in Europe
Politics &Policy, Volume 53, Issue 5, October 2025.ABSTRACT This article explores how historical legacies and institutional configurations impact the governance models used in implementing State aid policies for broadband in France, Portugal, Spain, and the United Kingdom. The analysis is based on historical institutionalism, focusing on path dependence, critical junctures, and gradual institutional ...
Luís Manica +2 more
wiley +1 more source