Results 31 to 40 of about 1,025,688 (169)
Zhongguo shiyan zhenduanxue, 2013 幽门螺杆菌（Helicobacter pylori,Hp）除菌治疗,环氧化酶-2抑制剂和抗氧化物的应用是主要的胃癌化学预防方法。胃癌发病与氧自由基损害有关,部分具有生物活性功能的抗氧化物,如维生素C,维生素E,叶酸,大蒜素,儿茶素等可能抑制胃癌发生[1,2]。因此 ...
曹雪源 +4 more
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Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Refractory high‐entropy alloys (RHEAs) face severe oxidation challenges at elevated temperatures, despite their outstanding mechanical properties. Consequently, understanding the oxidation mechanisms of RHEAs is crucial for their high‐temperature applications.
Zheng Tian +7 more
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Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Composite materials hold significant potential for abrasive sealing, yet composite materials used for abrasive sealing fall short in service durability under extreme environments. Here, a controllable strategy for adjusting pore structure is proposed, aiming to design a YSZ(ESP)/BN@ZrO2‐polyester coating with hybrid micron/nanometer ...
Shuang Yu +8 more
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四川大学学报. 自然科学版, 2007 以不同Cd2+浓度对土培小麦进行处理,分别在拔节、抽穗、灌浆初期以及灌浆中期,分析不同浓度Cd2+胁迫下活性氧及酶促和非酶促抗氧化系统的变化.结果表明,随着小麦生育进程的变化,Cd2+胁迫使O2.-、H2O2和MDA含量增加,且生育前期的增长量明显大于后期;各生育时期的抗氧化酶和抗氧化物也出现不均衡变化:抽穗—拔节期间,SOD活性升高,CAT保持稳定,酶促抗氧化系统对活性氧的清除作用显著;灌浆期后,SOD、CAT活性均比对照有所下降,而抗坏血酸-谷胱甘肽氧化还原途径中的APX、GR活性以及AsA ...
黎晓红 +4 more
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复配抗氧化剂在牡丹籽油乳液中的抗氧化作用研究Antioxidant effect of complexed antioxidants on peony seed oil emulsion
Zhongguo youzhi为提高牡丹籽油乳液的氧化稳定性，将叔丁基对苯二酚（TBHQ）与天然抗氧化剂（生育酚、抗坏血酸）进行复配，测定不同抗氧化剂对牡丹籽油乳液的抗氧化作用，并分析了不同复配抗氧化剂的相互作用机制。结果表明：在贮藏30 d时，添加和未添加抗氧化剂牡丹籽油乳液的粒径相较于0 d 均略有增加，200 mg/kg TBHQ与800 mg/kg抗坏血酸复配时乳液的Zeta电位绝对值最大，且抗氧化作用最强；TBHQ与抗坏血酸表现出较好的协同抗氧化作用，与生育酚表现出拮抗作用 ...
张子怡， 唐林， 郭芷淳， 储佳怡， 钱文一， 刘宇， 常明， 刘睿杰 ZHANG Ziyi, TANG Lin, GUO Zhichun, CHU Jiayi, QIAN Wenyi, LIU Yu, CHANG Ming, LIU Ruijie
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Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Interface polarization enhancement and impedance matching optimization are the keys to improving the comprehensive performance of microwave absorbing materials (MAMs). Herein, a green synthesis strategy integrating sacrificial template self‐etching, hydrothermal reaction, and annealing treatment is proposed to successfully fabricate urchin ...
Zhenzhen Tian +8 more
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Diabetic wound infections are a common complication of diabetes, which severely impact patients' quality of life. Effective treatment of diabetic wound infections remains one major challenge in the clinic, partially due to the formation of bacterial biofilm and antibiotic resistance.
Liang Zhou +8 more
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT By adding CuO, the worm‐like amorphous phase and atomic clusters were simultaneously introduced, enabling the (Ni40Ti40Cu20)99.9O0.1 alloy micron columns to exhibit a uniform flow strain of over 40% and a strength of over 2.5 GPa during compression.
Huwen Ma +13 more
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT MXenes have been widely investigated as microwave absorption (MA) materials because of their unique properties. This study introduces a terminal bond manipulation strategy to enhance charge transfer and polarization in Ti3C2Tx, optimizing its MA performance.
Xiang Fang +8 more
wiley +1 more source
Gaoya dianqi, 1994 一、概述最常见、用量最大的电力设备用油是绝缘油（即变压器油）.运行中电力设备内的油的质量好坏和使用寿命,除了与运行环境、维护监督有着密切关系外,采取合理而有效的防劣措施,能减缓油质的老化,延长油的使用年限.相反,若没有良好的防劣措施,油液运行数年后将劣化变质,其主要原因是与空气中氧作用,尤其在高温、水分、高速流动、电场和外界杂质影响下,油的老化产物增多、劣化速度加快,出现氧化、乳化等现象,油的性能降低甚至会发生事故.绝缘油添加T501型抗氧化剂可防止上述情况的发生.二 ...
张贤明
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