Results 31 to 40 of about 6,166 (164)

Elevation, soil pH and calcium availability shape regional and local scale spatial patterns of PhoD gene abundance in tropical and subtropical forests

open access: yesFunctional Ecology, Volume 40, Issue 4, Page 983-1000, April 2026.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Organic phosphorus mineralization is a critical process in the phosphorus cycle, governing phosphorus bioavailability for plants. The PhoD gene, which encodes the key enzyme alkaline phosphatase, serves as a valuable biomarker for this process.
Sandhya Mishra   +3 more
wiley   +1 more source

Use of species’ responses to cryptic anthropogenic disturbances for monitoring biodiversity outcomes in tropical forests

open access: yesConservation Biology, Volume 40, Issue 2, April 2026.
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

Using miniaturized laboratory equipment and DNA barcoding to improve conservation genetics training and identify illegally traded species

open access: yesConservation Biology, Volume 40, Issue 2, April 2026.
Abstract Illegal wildlife trade (IWT) is one of the largest global illegal activities, and it negatively affects biodiversity and sustainable development worldwide. DNA barcoding coupled with high‐throughput sequencing (i.e., metabarcoding) is useful in identifying taxa affected by IWT and has been used routinely for decades.
Maria Joana Ferreira da Silva   +9 more
wiley   +1 more source

高温钠热管间歇沸腾换热特性分析

open access: yesHe jishu
热管作为一种将蒸发和冷凝相结合的高效传热元件,被广泛应用于核能和航空航天等领域。热管若发生间歇沸腾将造成温度波动,进而影响整个热管冷却反应堆的安全。针对钠热管在不同充液量的情况下间歇沸腾的换热特性开展实验和理论的研究。实验方面,搭建了高温钠热管加热的实验台,研究了以液态金属钠为工质的热管在不同的液面深度和不同的丝网目数下其蒸发段的换热特性。理论方面,在实验数据的基础上,分析了不同充液量、不同丝网目数的对蒸发段换热系数的影响,并提出了钠热管在单相对流区和间歇沸腾区的蒸发段换热系数的模型。结果表明 ...
王 岩   +6 more
doaj   +1 more source

Success of restoration strategies in preventing extirpation of 2 critically endangered coral species

open access: yesConservation Biology, Volume 40, Issue 2, April 2026.
Abstract An unprecedented marine heatwave in 2023 caused widespread coral bleaching and mortality throughout the Caribbean. In the Florida Keys (USA), 2 foundation species, elkhorn coral (Acropora palmata) and staghorn coral (Acropora cervicornis), were severely affected.
Erinn M. Muller   +29 more
wiley   +1 more source

纵向焊接铝合金构件的试验和设计研究

open access: yesJianzhu Gangjiegou Jinzhan, 2008
大多数结构用铝合金通常要经过热处理或加工硬化以得到比退火状态更高的力学性能。这种合金焊接后,焊接热会使焊缝附近局部区域(称为热影响区HAZ)强度降低。而对于钢结构,由于其热导率比铝材小得多,因此只有高强钢才可能产生强度降低的热影响区,而且其强度的降低没有铝合金显著,热影响区宽度也比铝合金小得多。这将使焊接铝合金构件的设计变得更为复杂。由于我国目前还没有关于铝合金结构的设计规范,为此本文通过试验研究及对已有试验数据的分析,并在参考国外规范的基础上,提出了纵向焊接铝合金构件的设计建议公式 ...
吴芸, 张其林
doaj  

Research on crack repair for Ⅳ-stage guide vanes of aero-engine [PDF]

open access: yes
In order to meet the reliability of an aero-engine and ensure the flight safety of helicopter, the welding repair of the crack fault of the Ⅳ-stage guide vanes is studied.
GE Haifeng   +5 more
core   +1 more source

Sun Bear Ecology and Conservation: Multiscale Habitat Associations in Southeast Asia 马来熊的生态与保护:东南亚地区的多尺度生境关联研究

open access: yesIntegrative Conservation, Volume 5, Issue 1, Page 125-136, March 2026.
We collated detections of the sun bear from new and previously published camera trap studies across its range. We then analysed these detections at two different spatial scales to assess the habitat associations and diel activity of this species. We found that the sun bear is tolerant to moderate habitat disturbances. ABSTRACT Degraded tropical forests,
Alexander Hendry   +5 more
wiley   +1 more source

Electrochemical Behaviors of the 316L Stainless Steel Welding Seam Corrosion [PDF]

open access: yes, 2013
316l不锈钢以其优良的耐腐蚀性能、加工性能和高抗氧化性能而被广泛应用于核电、石油、化工等领域。316l不锈钢的应用大多需要焊接成型,但焊接过程中化学成分,组织形态和相关性能的改变,使316l不锈钢的耐蚀性能降低,在焊缝接头处以及焊缝部位优先发生腐蚀,严重影响了不锈钢的使用寿命和安全性。本文采用交流阻抗法和阳极极化常规电化学方法,结合课题组自主研发的扫描微电极技术研究316l不锈钢焊缝区的腐蚀行为 ...
吕虹玮   +4 more
core  

Mechanism analysis of cutting distortion of thin plate with high tensile strength steel for its prediction and control [PDF]

open access: yes
ObjectiveIn order to effectively control flame cutting precision of thin plate with high tensile strength steel, Generation mechanism of out-of-plane buckling distortion and in-plane bending distortion were investigated, and processing with dynamic ...
Hongquan ZHAO   +6 more
core   +1 more source

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