Results 11 to 20 of about 1,767,353 (141)
, 2006 采用湿混法制备了以γ-Al203为载体的固体碱催化剂（MgCO3／γ-Al2O3，Na2CO3／γ-Al203，CaC03／γ-Al2O3，K2CO3／γ-Al2O3），将K2CO3／γ-Al2O3催化剂用NaOH溶液浸渍得到K2CO3／γ-Al2O3-NaOH催化剂。以乙酸和乙醇的酯化反应为模型反应，对所制备的固体碱催化剂的酯化反应活性进行了评价，并在筛选出的酯化反应活性较高的K2CO3／γ-Al2O3催化剂上，对生物油催化酯化改质进行了研究。实验结果表明，生物油经催化酯化改质后，运动黏度显著降低 ...
王铁军 +4 more
core +5 more sources
World Medical &Health Policy, Volume 18, Issue 3, September 2026.ABSTRACT Confrontational violence still puts catastrophic burdens on children, with 2024 being the highest recorded levels of displacement, malnutrition, injury, and deprivation in contemporary humanitarian history. Children's surgical care is still grossly underrepresented in health responses worldwide in the prevention of avoidable deaths and long ...
Gaurav Chanderprakash Mittal +4 more
wiley +1 more source
Phenology drives asymmetric responses of ecosystem productivity stability to warming and cooling
Functional Ecology, Volume 40, Issue 9, Page 2959-2971, September 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Ecosystem productivity stability is a key indicator of ecosystem functioning under climate change, but the role of cooling periods in increasingly variable climates remains poorly resolved.
Yao Wei +11 more
wiley +1 more source
Insights Into the Temperature‐Dependent Oxidation Mechanism of Metallic Cerium in H2O‐N2 Atmospheres
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Metallic cerium (Ce), a widely used surrogate for actinide metals, enables mechanistic studies of reactions in complex gas environments under controlled and safer laboratory conditions. Here, the oxidation behavior of Ce in H2O‐N2 mixed atmospheres was investigated from 200°C to 350°C using in situ thermogravimetry–mass spectrometry, in situ X‐
Kun Huang +10 more
wiley +1 more source
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Lithium–sulfur (Li–S) batteries are promising for next‐generation high‐energy‐storage systems but are hindered by polysulfide shuttle, sluggish kinetics, and volume expansion. Conventional carbon hosts struggle to simultaneously anchor and convert polysulfides efficiently.
Ling Chen, Peng Xu, Jiaojing Shao
wiley +1 more source
Gongye shui chuli, 2005 难降解废水一直是水处理领域所关注的热点和难点。通过实际工程中遇到的某化工废水的可生化性研究,简要介绍和分析了采用超声、臭氧、电解、二氧化氯和生物铁法等方法提高难降解废水可生化性的适用情况和优缺点,为类似废水的生物法处理提供了借鉴。本工程采用臭氧+UASB+接触氧化工艺处理后,调试及运行表明,总BOD5和CODCr的去除率能够达到98.0%和97.0%以上,运行稳定,出水水质达到GB8978—1996的Ⅱ级标准,运行费用为3.06元/m3。
李发站 +3 more
doaj +2 more sources
Flexible, Robust Transparent Conductive Films With Excellent Electromagnetic Shielding Properties
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Transparent conductive films (TCFs) are indispensable components for next‐generation wearable electronics, intelligent robots, and electromagnetic interference (EMI) shielding devices. However, the fabrication of conventional random metallic mesh suffers from an inherent trade‐off between “randomness and controllability”.
Shanghao Lu +5 more
wiley +1 more source
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Advanced metallic glasses, leveraging their ultrahigh strength, excellent corrosion resistance, superior soft magnetic properties and good biocompatibility, have gradually become indispensable strategic cornerstones in critical fields such as aerospace, electronic information and energy power. This unique combination of properties enables them
Yizhou Liu +11 more
wiley +1 more source
Gongye shui chuli焦化废水污染负荷高、有机污染物组成复杂、生物毒性强，是一类非常难处理的煤化工废水。经传统的“物化+生化”工艺处理后，其生化尾水中仍残留部分难降解有机物与一定的生物毒性，COD难以达到《炼焦化学工业污染物排放标准》（GB 16171—2012）的限值要求，需进一步处理。分析了焦化废水生化尾水中的残余有机物和生物毒性特征，归纳总结了混凝、吸附、膜过滤等分离技术，Fenton、催化臭氧氧化、电磁强化氧化 ...
李泽乙 +6 more
doaj +2 more sources
Microstructure Tailoring of Laser Powder Bed Fused Nb521 Alloy Toward Strength‐Ductility Synergy
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Niobium‐based refractory alloys are promising candidates for high‐temperature aerospace structures, yet their limited ambient‐temperature ductility and poor processability remain major barriers to broader implementation. Here, Nb521 alloy was fabricated by laser powder bed fusion (LPBF), and the effects of processing conditions and subsequent ...
Lele Qin +7 more
wiley +1 more source