Results 41 to 50 of about 489,288 (151)

Importance of connectivity for carnivore richness and occupancy in fragmented biodiversity hotspots

open access: yesConservation Biology, Volume 39, Issue 6, December 2025.
Abstract Structural connectivity affects wildlife movement between habitat patches, contributing to the persistence of wildlife populations and their resilience to human‐induced and environmental changes. However, its importance to wildlife population persistence remains unclear, particularly in fragmented landscapes, where there are additional co ...
Cindy M. Hurtado   +12 more
wiley   +1 more source

Strategies in Ericaceae to acquire phosphorus in phosphorus‐impoverished habitats in the southwest Australian biodiversity hotspot

open access: yesFunctional Ecology, Volume 39, Issue 10, Page 2889-2904, October 2025.
Read the free Plain Language Summary for this article on the Journal blog. Abstract In the Southwest Australian Biodiversity Hotspot, the greatest plant species diversity tends to occur on the most phosphorus (P)‐impoverished soils. Many plant species in this P‐impoverished environment release root carboxylates that mobilise soil P which is a more ...
Xue Meng Zhou   +5 more
wiley   +1 more source

CT肾平滑肌瘤1例报道

open access: yesZhongguo shiyan zhenduanxue, 2012
1病历摘要患者女,27岁,体检发现左侧肾脏占位7天入院。无发热,无尿频、尿急,无血尿、脓尿,无腰、腹疼痛等症状。查体:均未见明显异常。血、尿常规,及其它血液学检查均未见明显异常。彩超示 ...
于敦祥, 王继萍, 潘海峰, 郑彦
doaj  

一起500 kV沿海线路复合绝缘子异常发热原因分析

open access: yesDianci bileiqi, 2023
沿海线路复合绝缘子长期受高盐雾、海风侵蚀,为了有效判定沿海线路复合绝缘子运行状态,对沿海某500 kV线路开展了无人机复合绝缘子红外测温,发现部分复合绝缘子多部位出现异常发热,1月后复测发现非高压端发热消失,仅剩高压端仍有温升。针对此现象抽取了8支异常发热复合绝缘子试品进行试验分析,包括外观检查、红外测试、芯棒剖检、水扩散试验等。试验结果表明绝缘子发热均位于护套表层,非高压端发热现象由复合绝缘子表面积污引起,高压端发热主要由端部高场强、积污共同作用引发,绝缘子芯棒内部无酥朽缺陷,绝缘子机械性能良好 ...
赵浩然   +6 more
doaj  

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

一起220 kV油浸倒置式CT异常发热缺陷诊断分析

open access: yesGaoya dianqi, 2019
红外检测作为电流互感器(CT)带电检测的重要手段,能快速、实时地带电检测和诊断出设备的大多数异常发热缺陷,防止出现故障。文中首先分析了广州电网自2005年来电流互感器红外带电检测开展的工作质效,发现红外检测可有效检测高压电流互感器缺陷。然后具体分析了一起红外检测发现的220 kV倒置式CT综合致热型缺陷,从现场高压介损试验、绝缘油试验以及局放试验多方法、多维度相结合对发现异常的电流互感器进行了综合诊断分析,明确了异常CT内部缺陷存在。最后通过停电检修解体,发现了异常CT膨胀器内部缺油 ...
范伟男   +5 more
doaj  

双侧胫骨骨内腱鞘囊肿1例报道

open access: yesZhongguo shiyan zhenduanxue, 2019
骨内腱鞘囊肿是骨的良性病变,临床上多为单发,多发病例少见,临床表现为病变部位的慢性疼痛,缺乏特异性,为进一步加强对本病的认识,本文对我院收治的1例患者进行报道并文献复习。1临床资料患者,女,51岁,主诉"发现右侧膝关节肿物1年余"。患者于入院1年前无明显诱因发现右侧膝关节肿胀,活动受限,无明显疼痛,左侧膝关节无明显异常。入院查体:患者一般状况可,无发热寒战,无午后低热盗汗,饮食无异常 ...
侯跃超   +5 more
doaj  

中国古代的异常天象观

open access: yes, 1994
异常天象在中国古代受到高度重视,是历代天文观测的一项重要内容。象人类对所有事物的认识一样,中国古代对异常天象的认识也是以最初自发的直觉认识为开端,形成异常天象的概念,在阴阳说、五行说、元气说等关于自然的理论形成以后,对异常天象的解释随之产生。此外 ...
徐凤先
core  

胆管小细胞神经内分泌癌1例报道及文献复习

open access: yesZhongguo shiyan zhenduanxue, 2017
神经内分泌肿瘤起源于肽能神经元和神经内分泌细胞的异质性肿瘤,常常发生于胃肠道,发生于胆管的神经内分泌肿瘤十分罕见[1,2],因其临床及影像表现缺乏特异性,常被误诊为胆管癌,现将笔者收集的1例报道如下。1临床资料患者,女,66岁,皮肤及巩膜黄染1月,无寒战及发热 ...
牛猛, 丁军, 李云鹏飞
doaj  

胎儿多发畸形与染色体异常的相关性分析

open access: yes, 2011
【目的】 探讨多发畸形胎儿的产前诊断特征及其与染色体异常的关系。【方法】 对853例产前诊断胎儿进行研究,根据超声检测检出多发畸形与否,分为多发畸形组(n = 103)及非畸形组(对照组,n = 750),行常规染色体核型分析;收集相关临床资料:分析胎儿畸形超声发现时期、畸形类别、畸形数目、染色体异常率和异常类型以及染色体异常与多发畸形的相关性。【结果】 两组胎儿比较,染色体异常率(多发畸形组43.69%,对照组0.93%),性别比(多发畸形组1.94,对照组0.97),产前诊断孕周[多发畸形组(25 ±

core  

Home - About - Disclaimer - Privacy