Results 1 to 10 of about 1,392,252 (83)
Shuitu Baochi Xuebao, 2022 为寻找可行的强化Cd污染土壤植物修复的方法,通过室内培养试验,设置7个不同稀释梯度木醋液添加处理,研究木醋液对石灰性重金属污染土壤的理化性质、酶活性和Cd形态的影响。结果表明:随木醋液浓度升高,土壤pH逐渐降低,EC(除原液外)无明显变化。土壤有机质、碱解氮、有效磷和速效钾含量较CK分别增加0.35%~66.64%,9.74%~96.10%,31.71%~56.64%,8.34%~30.87%。稀释10~100倍土壤脲酶、蔗糖酶和过氧化氢酶活性明显增加,而稀释5倍和木醋液原液处理土壤酶活性显著被抑制(P＜
吴苗苗 +6 more
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Zhejiang Daxue xuebao. Lixue ban, 2007 杯[6]芳烃可以作为一种外给电子体活化三（2，6-二叔丁基-4-甲基苯氧基）稀土配合物催化ε-己内酯开环聚合.适量加入杯[6]芳烃于三（2，6-二叔丁基-4-甲基苯氧基）稀土催化剂中，提高了ε-己内酯0 ℃下开环聚合的活性和所得聚己内酯的分子量.
ZHUWei-pu(朱蔚璞) +2 more
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Evaluation of Heavy Metals and Rare-Earth Elements in Famous Black Teas at Home and Abroad(国内外红茶重金属及稀土元素的安全性评价) [PDF]
Shipin kexue jishu xuebao, 2017 Using black teas at home and abroad as materials, inductively coupled plasma mass spectro-meter (ICP-MS) method was adopted to determine the content of (Cu), lead (Pb), arsenic (As), mercury (Hg), chromium (Cr), cadmium (Cd) and 16 rare-earth elements ...
WANG Qiushuang(王秋霜) +3 more
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Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT f–f electronic transitions of rare‐earth elements typically exhibit unique physicochemical properties that benefit the photocatalytic performance of the catalysts containing the elements. Although conventional rare‐earth metal oxides or single‐atom doping in semiconductors have been extensively studied, the construction of heterojunction ...
Yang‐Sen Xu +6 more
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Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Multicomponent transition metal oxides (TMOs) incorporating rare‐earth (RE) elements have emerged as promising materials for the oxygen evolution reaction (OER). However, knowledge of how to regulate the structure of TMO‐based nanomaterials through RE incorporation to enhance catalytic performance remains limited.
Bolin Zhao +6 more
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Optimized Copper Distribution and Enhanced Coercivity in PrO2‐Doped Sm2Co17‐Type Magnets
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT A rational design of Cu distribution is crucial for achieving optimal magnetic properties in Sm2Co17‐type magnets. In this study, nanostructured PrO2 powders were employed to induce Cu redistribution at grain boundaries while preserving the cellular microstructure. The corresponding coercivity (Hcj), remanence (Br), and maximum energy product (
Qi‐Qi Yang +5 more
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Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT With increasing complex requirement in organic pollution environment, the development of actual electromagnetic wave (EMW) absorbers with high EMW absorption performance and self‐cleaning pollution function is becoming a significant challenge.
Shou‐Hang Lv +8 more
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Zhongguo shiyan zhenduanxue, 2012 近年来稀土化合物在农业生产上较为常用,对农作物及动物有增产增效作用,目前已证实植物性食品中含有一定浓度的稀土元素,随着稀土微肥的广泛应用,稀土元素可经食物链进入机体内[1-4],因此稀土对生态环境和人体健康的影响以及对稀土近期及远期生物学效应的研究也越来越引起人们的关注,近年来有些学者报道了较低剂量的稀土化合物经口服、腹腔注射及尾静脉注射可提高机体的免疫力及抗氧化能力[4-6],本实验依据这一点通过对糖尿病大鼠心肌超氧化物歧化酶（SOD）和脂质过氧化物（LPO）的研究 ...
黄可敬, 黄可欣, 李锐, 石搏
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Dianci bileiqi, 2010 在不同温度下测量了稀土氧化物Gd2O3、Ce2O3掺杂ZnO-Bi2O3系压敏陶瓷的介电频谱,发现稀土氧化物的掺杂引起介电损耗显著增大。通过理论计算发现稀土氧化物掺杂后锌填隙和氧空位浓度显著增大,而耗尽层宽度明显减小。因此认为稀土氧化物引起施主性本征缺陷浓度的增大,导致Schottky势垒变薄,从而引起泄露电流的增大及非线性指数的下降。
成鹏飞, 李盛涛
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稀土氧化物对ZnO-Bi2O3系压敏陶瓷晶粒分布及电气性能的影响
Dianci bileiqi, 2008 研究了稀土氧化物Ce2O3、Gd2O3、La2O3、Y2O3对ZnO-Bi2O3系压敏陶瓷晶粒尺寸和电气性能的影响,结果表明,稀土氧化物可有效地抑制ZnO晶粒的生长,掺杂Ce2O3、Gd2O3、La2O3、Y2O3后,晶粒的主要分布分别为0～18μm、0～14μm、0～11μm、0～16μm;平均晶粒尺寸下降,其中掺杂Gd2O3后晶粒尺寸最小,为6.2μm。ZnO晶粒分布的标准方差明显下降,改善了晶粒尺寸分布的均匀性。掺杂稀土氧化物后,电位梯度显著提高,E1mA达到了427.5V/mm ...
李盛涛, 成鹏飞, 王玉平, 朱斌
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