Results 41 to 50 of about 2,304 (158)

Eyes on nature: Embedded vision cameras for terrestrial biodiversity monitoring

open access: yesMethods in Ecology and Evolution, Volume 15, Issue 12, Page 2262-2275, December 2024.
Abstract We need comprehensive information to manage and protect biodiversity in the face of global environmental challenges, and artificial intelligence is required to generate that information from vast amounts of biodiversity data. Currently, vision‐based monitoring methods are heterogenous; they poorly cover spatial and temporal dimensions, overly ...
Kevin F. A. Darras   +11 more
wiley   +1 more source

扎龙自然保护区丹顶鹤巢址景观连接度评价

open access: yes野生动物学报, 2018
景观连接度度量了物种在斑块之间的运动不受阻碍的连通性,对生境质量和破碎化研究有重要意义。本文基于2004年和2013年扎龙自然保护区遥感影像的解译分类,采用基于图论法的面积权重指数(AWF)划定巢址景观连接度等级,然后对不同景观连接度区域的景观格局特征指数进行分析。结果显示:2004年高景观连接度的丹顶鹤生境斑块面积为522.16 km2,而2013年高景观连接度斑块下降为432.82 km2,高景观连接度斑块集中分布于核心区内部; 2013年高景观连接度斑块的平均斑块周长面积比明显高于其他斑块 ...
李菲菲 马社刚 李 浩 袁 力 程 鲲 马建华
doaj  

Experimentally testing animal responses to prescribed fire size and severity

open access: yesConservation Biology, Volume 38, Issue 3, June 2024.
Abstract Deserts are often highly biodiverse and provide important habitats for many threatened species. Fire is a dominant disturbance in deserts, and prescribed burning is increasingly being used by conservation managers and Indigenous peoples to mitigate the damaging effects of climate change, invasive plants, and land‐use change. The size, severity,
Tim S. Doherty   +4 more
wiley   +1 more source

The Role of SRC-1 in myocardial infarction [PDF]

open access: yes, 2016
类固醇激素受体辅激活子(steroidreceptorcoactivator,SRC)作为一类转录协同因子,能够与多种转录因子相互作用并增强其转录活性。SRC-1是SRC家族(SRC-1/NCoA-1、SRC-2/GRIP/TIF2、SRC-3/AIB1/ACTR/pCTP/RAC3/TRAM-1)的一员。已有的研究表明SRC-1在体内具有多种生物学功能,SRC-1可参与乳腺癌、前列腺癌、肝癌等多种癌症的增殖与入侵。SRC-1在脑内突触的可塑性、神经干细胞分化等生理过程具有重要调控作用。此外,SRC ...
占少鹏
core  

老年性骨质疏松和血管钙化的相关性 [PDF]

open access: yes, 2018
老年性骨质疏松和血管钙化均为衰老伴行的退行性疾病,是老龄化社会主要的健康问题之一。近年来大量研究表明,老年性骨质疏松和血管钙化的发生呈正相关。现从流行病学、危险因素、发病机制和临床治疗等方面对二者的相关性逐一综述,从而为进一步的机制研究及临床诊治提供一定的理论参考依据,并寻找新的治疗靶点。福建省自然科学基金 ...
徐军霞, 杨娜
core   +1 more source

Importance of habitat heterogeneity in tidal flats to the conservation of migratory shorebirds

open access: yesConservation Biology, Volume 38, Issue 1, February 2024.
Abstract Understanding species distribution patterns and what determines them is critical for effective conservation planning and management. In the case of shorebirds migrating along the East Asian‐Australasian Flyway (EAAF), the loss of stopover habitat in the Yellow Sea region is thought to be the primary reason for the precipitous population ...
Shangxiao Cai   +4 more
wiley   +1 more source

颈动脉彩超检测粥样斑块对预防缺血性脑卒中的意义

open access: yesZhongguo shiyan zhenduanxue, 2018
目的探讨颈动脉彩超检查粥样斑块对预防缺血性脑卒中(ischemic cerebral stroke,ICS)的临床意义。方法选取我院神经内科住院52例ICS患者设为脑卒中组,另选取同期体检健康者50例设为对照组。所有受检者均进行颈动脉彩色多普勒超声检测,记录动脉粥样硬化斑块的数量、性质和部位。比较两组颈部动脉斑块(软斑、硬斑、混合斑)检出率、颈部动脉(左颈总动脉、右颈总动脉、左颈内动脉颅外段、右颈内动脉颅外段)内径。结果脑卒中组检测出粥样斑块96个,对照组24个;脑卒中组软斑、混合斑检出率均高于对照组 ...
王旭东
doaj  

缺血性卒中患者颈动脉斑块与内皮素-1及丙二醛水平的相关性分析 Correlation of Endothelin-1 and Malondialdehyde with Carotid Plaques in Patients with Ischemic Stroke

open access: yesZhongguo cuzhong zazhi, 2018
目的 探讨急性缺血性卒中患者颈动脉粥样硬化斑块与血浆内皮素-1(endothelin-1,ET-1)及丙二醛 (malondialdehyde,MDA)水平的关系。 方法 118例急性缺血性卒中患者均行颈动脉超声检查,分为动脉内膜正常组(12例)、动脉内膜 增厚组(28例)及动脉斑块组(78例);并将斑块组分为I级斑块(21例)、II级斑块(25例)、III级斑块 (32例)。测定各组患者血浆ET-1及MDA水平,并进行统计分析。 结果 内膜正常组、内膜增厚组和斑块组血浆ET-1水平分别为(2.34±0.
温慧军, 吕敏
doaj   +1 more source

Investigations of the Aggregation Mechanism of Amyloid-β Peptides Using Single Molecule Spectroscopy [PDF]

open access: yes, 2016
阿兹海默氏症(Alzheimer’sdisease,AD)或称脑退化症、阿尔兹海默病、老年失智症等,由德国精神病学家和病理学家爱罗斯•阿兹海默(AloisAlzheimer)于1906年发现并因此得名。阿兹海默氏症的致病过程与淀粉样前体蛋白(Amyloidprecursorprotein,APP)解离的含有40或42个氨基酸的淀粉样多肽Aβ的错误折叠密切相关。淀粉样多肽从淀粉样前体蛋白中裂解产生后由分泌小泡分泌至细胞外,并发生折叠聚集,对神经细胞造成损伤,从而直接导致疾病的发生 ...
王茜
core  

颅内外动脉并存粥样硬化斑块的影像学研究进展 Advances in Imageology of Intra- and Extracranial Coexisting Atherosclerotic Plaques

open access: yesZhongguo cuzhong zazhi, 2018
颅内动脉和颅外颈动脉并存粥样硬化斑块(简称并存斑块)在亚洲人群中具有较高的发 生率,其与缺血性卒中的发病风险具有显著的相关性。因此,早期识别并存斑块对于缺血性脑血管 事件的防控具有重要意义。目前,应用于并存斑块的影像学诊断方法有多种,其中高分辨率磁共振管 壁成像有广阔的应用前景。本文将主要针对并存斑块的影像学研究进展方面进行综述。 Abstract: Intra- and extracranial coexisting atherosclerotic plaques (coexisting ...
柳洋,韩华璐,赵锡海,王苇
doaj   +1 more source

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