Results 121 to 130 of about 22,800 (217)
Wildlife Letters, EarlyView.In this study we analyze the role of phylogeny, environment, and community structure on sociality. Using structural equation modeling (SEM) we aim to quantify the direct and indirect impacts of variables on behaviors including social grouping, reproduction, and space use among Carnivora species.
Jessica Ward +3 more
wiley +1 more source
Conservation Biology, EarlyView.Scaling area‐based conservation, including initiatives led or comanaged by Indigenous Peoples and local communities, is a flagship goal of the Kunming‐Montreal Global Biodiversity Framework. Conservationists often aspire to scale initiatives, but this is rarely achieved in practice. Identifying and addressing factors that limit initiative adoption (i.e.
Thomas Pienkowski +39 more
wiley +1 more source
活性碳上羧酸根锚定AuCl3催化乙炔氢氯化反应的理论研究 [PDF]
, 2018 采用密度泛函B3LYP方法,运用分子模型对活性碳（AC）上羧酸根负载AuClx催化剂的活性结构、稳定性以及催化乙炔氢氯化反应机制进行了详细的理论探讨。结果表明,AuCl3催化剂可以被表面羧酸根单中心级分散锚定,形成AC-COOH-AuCl3表面活性中心,进而在氢氯化过程中与乙炔发生协同加成生成氯乙烯,同时形成具有螯合结构的表面活性中心AC-CO2>AuCl2,进而催化氢氯化反应遵循分步反应异步加成机制:乙炔活化吸附到Au（Ⅲ）中心,HCl异裂亲核加成到乙炔伴随羧酸根质子化,分子内质子迁移形成Au（Ⅲ ...
吕鑫, 宁利超, 张冠如, 谭凯
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Differences in hydrocarbon generation kinetics between shale and tar-rich coal and temperature conditions for in-situ co-production [PDF]
The area of shale exhibiting middle- to low-maturity constitutes over 90% of the total shale area within the seventh Member of the Yanchang Formation (Chang 7 Member) in the Ordos Basin. Additionally, the tar-rich coal resources of the Lower-Jurassic Yan’
Ruihui ZHENG +3 more
core +1 more source
Conservation Biology, EarlyView.Abstract Measuring area‐based conservation outcomes in tropical forests is challenging due to cryptic human disturbances (e.g., hunting). As a result, comparative studies of management strategies providing quantitative outcomes remain scarce, especially in the Neotropics.
Lucy Perera‐Romero +5 more
wiley +1 more source
Constraints on timing of the early-paleoproterozoic magmatism and crustal evolution of the Oulongbuluke microcontinent: U-Pb and Lu-Hf isotope systematics of zircons from Mohe granitic pluton [PDF]
, 2007 The Olongbuluke micro-continent is composed of a two-fold basement with cover strata. The lower basement is the medium-to high-grade Delingha complex (DC) and the Dakendaban Group, the upper is the low-grade Wandonggou Group.
Chen, N +6 more
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Threats to and management of Natura 2000 protected areas relative to agricultural practices
Conservation Biology, EarlyView.Abstract The Natura 2000 (N2K) network combines biodiversity protection and socioeconomic targets. Human activities, such as agricultural practices, can affect biodiversity in N2K sites in diverse ways. Limiting activities with negative impacts while enforcing land management that supports biodiversity is crucial for effective conservation.
Giorgio Zavattoni +7 more
wiley +1 more source
When and why to give shorebirds a head start
Conservation Biology, EarlyView.Abstract Headstarting is a translocation technique involving the hatching or rearing of wild eggs or young in captivity and the release of those individuals back to the wild at or before independence. It has been trialed as a conservation intervention for shorebirds over recent decades to improve the population trend of target populations by increasing
Lynda Donaldson +4 more
wiley +1 more source
[[alternative]]Study on Tribological Behavior of A359Al/Gr.(p)+SiC(p) Composite [PDF]
計畫編號：NSC90-2212-E032-004研究期間：200108~200207研究經費：635,000[[sponsorship ...
林清彬
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Thermodynamics and kinetics of D-glyceric acid adsorption on ion exchange resin [PDF]
, 2016 D-甘油酸是一种重要的甘油衍生物,具有解酒护肝的功能。关于D-甘油酸生产方法的研究已有不少,但对其分离方法及分离机理的研究却鲜见报道。通过静态吸附实验,研究了D-甘油酸在201×7阴离子交换树脂上的等温热力学和动力学特性。结果表明,D-甘油酸在201×7阴离子交换树脂上的最大平衡吸附容量随p H的增加而降低,其吸附等温线符合Freundlich模型。在293~308 K下,吸附焓变为14.77 k J·mol-1,表明该吸附过程为吸热过程。升高温度有利于提高吸附速率,但对最大平衡吸附容量影响不大。同时 ...
卢英华 +4 more
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