Results 41 to 50 of about 24,262 (128)
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Directed energy deposition (DED) is an effective method to process complex components with high efficiency, owing to its significant advantage of material saving and features of microarea metallurgy and rapid solidification. This study presents a nano‐Ta‐optimized Ti‐45Al‐8Nb (at%)‐based alloy synthesized via DED. The prepared TiAl‐based alloy
Yi Song +8 more
wiley +1 more source
电化学方法制备Ba1-x-ySrxCayWO4晶态薄膜的相关机制分析
四川大学学报. 自然科学版, 2005 基于本组采用恒电流技术、直接在金属钨片上以电化学方法制备具有白钨矿结构的钡、锶、钙(包括其复合体系)钨酸盐(Ba1-x-ySrxCayWO4)薄膜的实验研究,分析了利用电化学方法制备功能薄膜中的成膜机制,讨论了晶态薄膜电化学制备过程中的电流密度、电解液酸度、沉积温度和溶液浓度等工艺条件对薄膜形成的影响.该研究结果对利用电化学方法制备相关薄膜也具有重要参考价值.
杨祖念 +6 more
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Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Semiconductor photocatalysis represents a pivotal frontier in the quest for sustainable energy and environmental remediation. Among the diverse catalytic materials, Bismuth Oxychloride (BiOCl) has emerged as a particularly promising candidate due to its unique layered structure, featuring [Bi2O2]2+ layers intertwined with halogen ions, which ...
Liu Han +5 more
wiley +1 more source
Emerging MBenes for Energy Technologies
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT The escalating global demand for sustainable energy is driving the search for transformative materials that transcend the limitations of conventional systems. Two‐dimensional (2D) transition metal borides (MBenes) have recently emerged as a compelling class, distinguished by unique electronic structures, tunable surface chemistry, and ...
Yingrui Ding +5 more
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四川大学学报. 自然科学版, 1979 近年来,在雌甾改造合成中,当在芳香A环上进行硝化,酰化,卤化和氧化等反应时,由于3-位酚羟基的影响,常导致2-和4-两种异构体。用红外光谱法简便地鉴别雌甾2-或4-衍生物,及时地提供化学合成的信息,具有一定的实用意义。
谢如刚, 徐正邦, 陈世矩
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Home‐Based Versus In‐Hospital Care in Pediatrics: A Systematic Review of Cost‐Effectiveness Studies
World Medical &Health Policy, Volume 18, Issue 2, June 2026.ABSTRACT Home‐based care has emerged as a potential alternative to traditional hospital‐based care for children and adolescents worldwide. This systematic review aimed to systematically gather and critically assess the available evidence on the cost‐effectiveness of home‐based versus in‐hospital care for pediatric populations globally.
Luís Carlos Lopes‐Júnior +8 more
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用模拟从头计算方法(SAMO)计算大分子——Ⅱ.王冠醚化合物的研究
四川大学学报. 自然科学版, 1985 本文用SAMO方法(The Simulated ab initio molecular orbital techni-que),对王冠醚化合物:12—Crown—4;12—ane—4;15—Crown—5;18—Crown—6 进行了量子化学研究。计算所得分子轨道能量与实验所得光电子能谱相符合,采用分子碎片模拟合成了冠醚分子的静电势场,较好的说明了王冠醚化合物的成键机理。
劳开勤
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Methods in Ecology and Evolution, Volume 17, Issue 6, Page 1896-1909, June 2026.Abstract Molecular identification of insect food webs can accurately reveal complex trophic interactions and serve as a foundation for understanding ecosystem functioning and advancing biodiversity conservation. This process typically involves DNA library construction, high‐throughput sequencing and subsequent steps, including data assembly, annotation,
Xiao‐man Zhang +9 more
wiley +1 more source
四川大学学报. 自然科学版, 1999 因卡宾类化合物在化学合成中被广泛采用．这类物质与其它化合物反应的微观机理越来越被人们重视，目前有大量的文献报道［１～６］．Ｈｏｆｍａｎｎ［２，３］利用ＺＨＭＯ方法对卡宾环加成反映的研究得到了该类反应无活化能的结论；文［４］和文［５，６］的研究表明，该...
周红平, 李来才, 唐作华
doaj
Fushe yanjiu yu fushe gongyi xuebao本研究提出了一种基于数字微流控芯片的18F-AlF-NOTA-奥曲肽合成新工艺。通过介质上电润湿（EWOD）技术，在微流控芯片上实现了多通道并行合成，有效解决了传统合成方法中的技术复杂、成本高、生产效率低，以及安全与环保等问题。在优化后的反应条件下（反应温度120 ℃、反应时间5 min、前体质量浓度0.2 mg/mL），最高放射化学产率达到了24.85%，且产品放化纯度大于99.0%。该方法显著降低了设备初始投入（下降50%~60%）和单次合成成本（下降71%~72%），还大幅缩短了合成时间至15 ...
王 飞鸿 +9 more
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