Results 71 to 80 of about 2,341,099 (172)
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Bimetallic structures fabricated by laser powder bed fusion (LPBF) provide an effective strategy for achieving multifunctional integration, yet interfacial structural continuity and the role of lattice defects remain insufficiently understood.
Jinguo Ge, Shuo Yin
wiley +1 more source
, 1999 一种中温固体氧化物燃料电池的阳极基膜，其特征在于：该阳极基膜为以ＮｉＯ和ＹＳＺ复合的多孔陶瓷材料，其中ＮｉＯ的重量占３０～８０％，平均孔径为３０～６０Ａ，孔隙率为３０～５０％，基膜厚度为０．５～５ｍｍ。本发明提供了一种高强度、大渗透率、高电导率的阳极材料，在其上印刷ＹＳＺ薄膜和阴极材料，可使电池工作温度降低至８００℃，从而降低了无机密封和双极连接材料的选择要求，使得固体氧化物燃料电池进入商品化阶段 ...
曹化强, 卢自桂, 江义, 阎景旺
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Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT High‐yield photocatalytic H2O2 production in sacrificial agent‐free pure water constitutes a critical bottleneck requiring urgent advances in energy catalysis. Although ZnIn2S4 (ZIS) exhibits favourable visible light absorption, it is plagued by severe bulk charge carrier recombination and scarce accessible surface‐active sites.
Sheng Liu +7 more
wiley +1 more source
生物质能源转化技术与应用(Ⅷ)——生物质的生物转化技术原理与应用
, 2008 生物质能源是惟一可再生、可替代化石资源转化成气态、液体和固态燃料以及其他化工原料或者产品的碳资源。随着化石资源的枯竭和人类对全球性环境问题的关注,生物质能源替代化石资源利用的研究和开发,已成为国内外众多学者研究和关注的热点。本系列讲座主要讲述以生物质资源为主要原料,通过不同途径转化为洁净的、高品位的气体、液体或固体燃料。本讲主要综述了木质纤维素的生物转化过程的关键技术,包括原料预处理、纤维素酶解、微生物发酵和产品的分离提纯,指出生物转化技术的发展趋势是非粮生物质的生物转化和利用 ...
王岚, 陈洪章
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四川大学学报. 自然科学版, 1980 强力霉素(简称α-体)生产中氢化产物是较为复杂的.其中不仅有未反应的原料甲烯土霉素,而且还有副产物如强力霉素的差相异构体——β-强力霉素(简称β-体)和结构未知的氢化产物(生产上习称“前沿”).因此,氢化工艺中的耗氢量并不能反映α-体的产量.若采用强力霉素的成品分析法——生物效价法则因这些杂质不仅含量高,而且又有一定的生物活性,故使该法也不能应用.若采用薄层层折法检查,虽能查出这些杂质是否存在,但难于对α-体含量直接进行测定.为了掌握氢化进程 ...
邹文铨 +3 more
doaj
Estimating the total mortality of seabirds following a marine heat wave
Conservation Biology, Volume 40, Issue 5, October 2026.Abstract Marine heat waves detrimentally affect a range of marine species, including seabirds, and are increasing in frequency and severity. When thousands of dead seabirds wash up on beaches, the public becomes concerned. However, the number of dead birds recorded on beaches is only a fraction of the total mortality; most birds perish at sea.
Jennifer L. Lavers +3 more
wiley +1 more source
, 2015 叶片是植物的主要光合器官,其质量与数量的权衡关系体现植物对环境的适应策略。在全球气候变化的背景下,研究叶片质量与数量关系有助于理解植物对环境变化的响应趋势。该研究应用标准化主轴回归方法,探讨了我国温带山地森林中48个常见树种的单叶干重与出叶强度的权衡关系。结果表明,所有物种以及落叶阔叶林、常绿和落叶阔叶树种、单叶以及亚冠层阔叶树种的单叶干重与出叶强度表现为异速生长关系;针叶林、针阔混交林、常绿及落叶针叶树种、复叶以及冠层阔叶树种则表现为等速生长关系。研究结果表明,叶大小和出叶强度并无恒定的权衡关系 ...
池秀莲, 刘长柱, 郭强
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Role of funders in embedding tests in conservation practice
Conservation Biology, Volume 40, Issue 5, October 2026.Abstract Effective conservation practice requires decisions based on reliable and relevant evidence, but significant gaps in the evidence base exist. Incorporating well‐designed tests of the effectiveness of interventions for biodiversity in conservation projects is one of the best ways to scale up the rate of evidence generation.
Rebecca K. Smith +28 more
wiley +1 more source
, 2005 本发明涉及通过多相催化氧化制备环氧化物的化学反应过程，具体地说是一种催化氧化官能化烯烃生成环氧化物的方法；在有机溶剂中以工业用三氯异氰脲酸作为环氧化试剂，以负载在氧化铝上的氟化钾为固体碱，催化氧化官能化烯烃生成环氧化物，反应温度为0～80℃，反应时间为0.1-20h。本发明的优点为：原料的转化率高，目标产物的选择性好，反应时间短，效率高、反应条件温和，操作易于控制、成本低，整个过程对环境没有污染 ...
张国富 +4 more
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Habitat and spatial trends of U.K. wintering waterbird populations over 50 years
Conservation Biology, Volume 40, Issue 5, October 2026.Abstract The United Kingdom is an important wintering ground for millions of waterbirds. Most U.K. wintering waterbird populations increased between 1970 and the mid‐1990s, but declined thereafter. We examined U.K. population indices in 46 wintering waterbird species in two 25‐year periods, 1970–1994 and 1995–2019, to identify which waterbird groups ...
Blaise Martay +8 more
wiley +1 more source