Results 41 to 50 of about 326,042 (161)

Spatial Phylogenetic Analysis of Chinese Lizards: Insights Into Ecological Drivers and Conservation Gaps 中国蜥蜴系统发育的空间分析:生态驱动因素与保护空缺

open access: yesIntegrative Conservation, Volume 4, Issue 3, Page 430-441, September 2025.
Our study identifies southern China, including mountainous regions and islands, as key areas rich in phylogenetic diversity, and phylogenetic endemism of lizards that are currently under‐protected. Current protected areas however do not adequately cover regions that are critical for preserving the evolutionary history of lizards.
Tao Liang (梁涛)   +8 more
wiley   +1 more source

膨腹海马(Hippocampus abdominalis)磷脂 及其脂肪酸组成分析Analysis of phospholipids and their fatty acid composition in the Hippocampus abdominalis

open access: yesZhongguo youzhi
为了揭示雌、雄膨腹海马磷脂组成及其差异,用溶剂萃取法分别提取雌、雄膨腹海马脂质,冷丙酮提取其中的磷脂,进一步采用薄层色谱法和硅胶柱层析分离制备各磷脂组分,利用气相色谱技术分析比较雌、雄膨腹海马磷脂及其各组分的脂肪酸组成。结果表明:雌、雄膨腹海马的磷脂含量丰富,分别占总脂的18.11%和18.72%;膨腹海马磷脂包括磷脂酰乙醇胺、磷脂酰胆碱、溶血磷脂酰胆碱和鞘磷脂,其中磷脂酰胆碱含量最高;膨腹海马磷脂中共鉴定出20种脂肪酸,且不饱和脂肪酸含量高于饱和脂肪酸含量;雌、雄膨腹海马磷脂中海洋特征性n ...
吴娟娟1,田佳宁1,陈奕蒙1,王成成1,王玉明1,2 , 姜晓明1, 薛长湖1, 张恬恬1 WU Juanjuan1, TIAN Jianing1, CHEN Yimeng1, WANG Chengcheng1, WANG Yuming1,2, JIANG Xiaoming1, XUE Changhu1, ZHANG Tiantian1
doaj   +1 more source

不同海拔喜马拉雅旱獭线粒体基因组比较分析

open access: yes野生动物学报, 2022
以分布在不同海拔(2 279、3 273、4 452 m)的喜马拉雅旱獭(Marmota himalayana)为供试材料,通过二代测序技术对线粒体基因组序列进行比较分析,挖掘喜马拉雅旱獭低氧适应相关基因。结果表明:不同海拔喜马拉雅旱獭线粒体序列长度之间并无差异,但蛋白质编码基因突变位点个数随海拔增加而增多,ND5基因的突变位点个数和非同义突变位点个数都为最多,其Ka/Ks>1,表明ND5基因存在正选择效应,可作为适应高海拔低氧环境的候选基因。与玉树(海拔4 452 m)相比,乐都(海拔2 279 m ...
南新营 李 优 李耀东
doaj  

Contrasting Patterns of Phyllosphere Fungal Diversity Between Angiosperms and Gymnosperms Along a Subalpine‐Elevation Gradient 题目:亚高山海拔梯度上被子植物与裸子植物叶际真菌多样性的相反格局

open access: yesIntegrative Conservation, Volume 4, Issue 3, Page 476-490, September 2025.
The leaf functional traits of angiosperms and gymnosperms in mountain ecosystems significantly influence phyllosphere fungal diversity. These traits are critical for understanding fungal stress resistance and elevational adaptation, which aids in predicting plant responses to climate change.
Xiaocheng Yu   +7 more
wiley   +1 more source

卤代吲哚及其衍生物作为海洋防污剂的应用

open access: yes, 2013
本发明属于海洋防污涂料技术领域,具体的说是一种卤代吲哚及其衍生物作为海洋防污剂的应用。卤代吲哚及其衍生物作为海洋防污剂的应用。所述卤代吲哚、卤代吲哚衍生物中的一种或几种作为海洋防污剂的应用。本发明所述卤代吲哚类化合物能够抑制海洋污损微生物、海洋藻类、大型海洋污损动物的附着,显示出高效、广谱的防污活性。卤代吲哚类化合物广泛存在于海洋生物中,易于被生物降解,低毒、无污染,用其制备的海洋防污剂不含重金属,不会对环境造成危害。同时,卤代吲哚类化合物人工合成方法简单 ...
马宣宣   +4 more
core  

海水酸化和磺胺甲恶唑复合暴露对大马蹄螺抗氧化酶活性和脂质过氧化的影响

open access: yes, 2020
为探讨海水酸化和磺胺甲恶唑环境残留对珊瑚礁区生物的影响,本文以南海珊瑚礁区关键礁栖生物大马蹄螺(Trochus niloticus)为研究对象,探究了两种环境胁迫因素对大马蹄螺的氧化胁迫作用。分别采用两个pH水平(pH 8.1、 pH 7.6)和三个磺胺甲恶唑浓度水平(0 ng/L、100 ng/L和1 000 ng/L)单独和复合暴露28天,测定其对大马蹄螺鳃组织的超氧化物歧化酶(SOD)、过氧化氢酶(CAT)和谷胱甘肽巯基转移酶(GST)活性以及谷胱甘肽(GSH)含量和脂质过氧化水平(LPO)的影响。
赵建民   +4 more
core   +1 more source

Pre‐Monsoon Habitat Preference and Spatial Overlap Between Blue Sheep (Pseudois nayaur) and Livestock in Dhorpatan Hunting Reserve, Nepal 尼泊尔多尔帕坦狩猎保护区季风前岩羊 (Pseudois nayaur) 与家畜的栖息地偏好及空间重叠

open access: yesWildlife Letters, Volume 3, Issue 2, Page 73-83, June 2025.
Blue sheep in Dhorpatan Hunting Reserve prefer alpine grasslands at 3800–4200 m on south‐facing slopes near water resources, favoring areas with low tree cover and dense ground cover, particularly rhododendrons, junipers, and Cyperaceae grasses. Their habitat significantly overlaps with livestock.
Amit Adhikari   +4 more
wiley   +1 more source

Integrating local ecological knowledge into systematic conservation planning for seahorse conservation

open access: yesConservation Biology, Volume 39, Issue 3, June 2025.
Abstract Successful long‐term conservation relies on strategic planning for pragmatic actions to mitigate threats. Prioritizing actions and areas to support conservation goals in the most cost‐effective scenario becomes crucial in resource‐limited environments. However, planning and management can be challenging in data‐limited contexts.
Anna Karolina Martins Borges   +3 more
wiley   +1 more source

一种壳聚糖/海藻酸钠组织工程支架的制备方法

open access: yes, 2005
一种壳聚糖/海藻酸钠组织工程支架,其结构为三层复合膜,分别是壳聚糖层、壳聚糖/海藻酸钠聚电解质层和海藻酸钠层,厚度是50~500μm,平均孔径是20~250μm,孔隙率是60~98%,拉伸强度是1~25MPa,断裂伸长率15~60%,吸水性能在90~900%。制备方法是:壳聚糖和海藻酸钠通过静电反应在界面处形成聚电解质,使两层复合,并且通过在海藻酸钠中加入碳酸氢钠与酸反应释放二氧化碳气体在支架内部形成孔隙。通过调整壳聚糖分子量、壳聚糖溶液浓度、酸浓度、海藻酸钠分子量、海藻酸钠浓度 ...
马莉华, 马小军
core  

柴郁温胆汤及其拆方对抑郁大鼠血清ACTH、COR及海马cAMP的影响 [PDF]

open access: yes, 2010
[目的]探讨柴郁温胆汤及其拆方对抑郁大鼠血清ACTH、COR和海马cAMP的影响。[方法]健康雄性SD大鼠84只,随机分为正常组、模型组、柴郁温胆汤组、化痰组、调气血组、养心脾组、马普替林组。参照Katz刺激方法制备慢性轻度不可预见性应激(CUMS)抑郁模型。采用放射免疫法测血清ACTH、COR和大鼠海马cAMP含量。[结果]与正常组相比,模型组大鼠血清ACTH和COR水平明显升高、海马cAMP含量明显降低。同模型组相比,柴郁温胆汤组及调气血组能明显降低ACTH浓度 ...
周海虹   +5 more
core  

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