Results 11 to 20 of about 25,441 (211)
Integrative Conservation, EarlyView.This research reveals the functional stability of mixed species foraging flocks (MSF) and their foraging height change with different taxonomic differences along the elevational gradient at Knuckles Montane Reserve, Sri Lanka. This offers new insights into how MSFs sustain with the elevational gradients supporting the altitudinal shifting species ...
Vimukthi. R. Gunasekeara +3 more
wiley +1 more source
Integrative Conservation, EarlyView.Pometia pinnata demonstrated life‐stage‐specific genetic responses to landscape features, with asymmetric gene flow patterns and population recovery following historical bottlenecks, revealing complex topographic and demographic influences on forest genetic structure.
Madhuparna Chatterjee +5 more
wiley +1 more source
Integrative Conservation, EarlyView.The Johnstone's whistling frog is an invasive species whose loud night‐time calls may affect human health and well‐being. Our study in Cali, Colombia, combined fieldwork and online surveys to assess its urban occupancy, density, and potential health impacts.
Rubén Darío Palacio, Sumana Goli
wiley +1 more source
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Decomposition is the transformation of dead organic matter into its inorganic constituents. In most biomes, decomposition rates can be accurately predicted with simple mathematical models, but these models have long under‐predicted decomposition in globally extensive ...
Heather L. Throop +8 more
wiley +1 more source
Molecular Design of Multi-elements Synergistic Flame Retardants and Investigation of Flame-retarded Modification on Epoxy Resins [PDF]
, 2016 无卤、低毒、绿色环保阻燃剂的研发是当今阻燃剂发展的主要趋势，其中阻燃效率高的多元素协同阻燃剂引起了广泛的关注。因此，对含磷、氮和硅三种阻燃元素的研究成为了阻燃材料领域的研究热点之一。本文分别以含硅的POSS和含磷的DOPO为阻燃基元，通过对分子结构的设计制备了不同P、Si比例的且同时含有磷、氮和硅三种阻燃元素的阻燃剂：POSS-bisDOPO（P:Si=1:4），ODMAS（P:Si=2:1），PmDOH（P:Si=1:8）和PoDOH（P:Si=1:1）。研究了阻燃剂对环氧树脂透明性、热性能 ...
刘诚
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Jianzhu Gangjiegou Jinzhan, 2022 为精确分析剪切型软钢阻尼器大塑性变形过程中生热对其耗能性能的影响，通过高温箱对软钢试件进行加热，在几种不同温度（25 ℃、100 ℃ 和 300 ℃）下进行单向扭转和往复扭转试验，研究温度对软钢力学性能和本构关系的影响。结果表明：高温会引起软钢的应力软化，但变形能力不受影响。温度对软钢往复加载起始的循环硬化和往复加载过程中的循环软化及其变化规律都没有影响。所建立的考虑温度效应的软钢本构模型可为科学评估软钢阻尼器的动态力学性能提供依据。
张超锋 +4 more
doaj
Synthesis of Phosphrous and Nitrogen Containing Flame Retardant and Its Application in Halogen-free Flame Retardant PBT [PDF]
, 2016 聚对苯二甲酸丁二醇酯（PBT）具有良好的力学性能和电性能且吸水率低，在较高温度下依然能保持其机械性能稳定，使其在汽车零部件、光纤电缆和电子电器中等领域得到广泛应用。但由于纯PBT存在阻燃性较差的缺点，燃烧过程中还存在熔融滴落，因此需要对其进行阻燃改性以满足更加严苛的应用要求。传统含卤素阻燃剂虽然效果好，可是被引燃后会产成有毒物质，使用范围受到限制。建立新型无卤、具有产业化潜力的PBT阻燃体系已成为科研工作者关注的研究热点之一。 本文以常见工业原料亚磷酸二乙酯、9，10-二氢-9-氧杂-10-磷杂菲-10-
林康彬
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Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Studies have shown that organisms may adjust metabolic rates in response to thermal variability, highlighting metabolic plasticity as a key adaptive mechanism. Understanding the extent of metabolic plasticity of an organism is key to predicting its adaptation to climate
Qian Hu +6 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2018 临床实习是医学高等教育的重要环节,其目的是通过进行临床实践教学,提高医学生的临床实践能力、临床思维能力、运用医学理论知识解决实际问题的能力、同时接受继续医学教育、培养良好的医患沟通能力以及进行科学研究的能力。儿科临床教学的目的是把临床实践教学和课堂教学有机结合起来,在保持教学系统性、完整性的同时,调动学生学习的主动性、积极性,把素质教育融入到儿科临床教学实践中,改变传统的传授知识的教学方法 ...
陈鹏 +4 more
doaj
, 2001 总结了近几年来纳米材料的研究进展，着重从纳米材料的制备、微观结构、力学及热力学性能的研究情况作了一个概述，总结了有关纳米材料的几个研究热点以及分子动力学计算机模拟在纳米材料研究中的应用 ...
刘曰武, 周富信, 文玉华
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