Results 21 to 30 of about 442 (114)

Activation of calix [6] arene in the ring-opening polymerization of ε-caprolactone catalyzed by rare earth aryloxide catalysts in low temperature(杯[6]芳烃在芳氧基稀土（镧、钕）催化ε-己内酯低温开环聚合中的活化作用)

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), LINGJun(凌君), SHENZhi-quan(沈之荃)   +2 more
doaj   +1 more source

f–f Transition in Er(OH)3 Promotes Photosynthesis of H2O2 Coupling With Oxidation of Benzylamine Over Sodium Poly(heptazine imides)

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, Liyi Tang, Yu‐Xiang Yu, Yunxiao Zhang, Xiao Yan, Yangke Long, Wei‐De Zhang   +6 more
wiley   +1 more source

稀土复合微肥的研制及其在水稻种植中的应用

四川大学学报. 自然科学版, 1996
经农业试验，获得了稀土、硼、锌３元素及添加剂４因素的最佳组合，制备了水稻用稀土复合微肥．通过实际进行的扩大试验结果表明，水稻喷施农用硝酸稀土或复合稀土后，各项指标均明显优于对照 ...
闵蔚宗, 李燕昆, 钟淑琳, 薛仪元, 高永才   +4 more
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Plasmon‐Enhanced NaYF4:Yb/Er/Tm UCNPs Fluorescent Biosensing for Ultrasensitive Detection of GP73 in Clinical Liver Cancer Diagnosis

Rare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT Early diagnosis of liver cancer demands high sensitivity, high specificity, convenience and real‐time monitoring capabilities. However, it encounters challenges such as low concentration of markers, numerous interfering factors, and limitations of detection technologies.
Changsheng Shi, Wei Cai, Zhixiang Lin, Yizhou Xu, Liu Xu, Bingru Zheng, Wen Li, Hui Tong, Qing Yang, Caiping Ding, Youju Huang   +10 more
wiley   +1 more source

南方典型红壤区不同水保措施下坡面产流产沙及稀土迁移特征

Shuitu Baochi Xuebao, 2018
以南方典型红壤区福建省长汀县水土保持科教园5种水土保持措施为研究对象，采集坡面产流产沙及稀土迁移数据，以期揭示南方红壤区水保措施的减水减沙效益及对稀土迁移的阻控效应。结果表明：（1）全坡面种草、封禁、低效马尾松施肥、乔灌草混交、人工补植马尾松5种水土保持措施的年均减流率和年均减沙率分别为65.41%，69.29%，63.42%，86.19%，72.59%和91.87%，84.21%，81.54%，94.13%，81.75%。（2）各降雨量下，5种水土保持措施径流和泥沙的稀土迁移强度分别比对照小区低85 ...
张青青, 陈志强, 陈志彪, 马倩怡   +3 more
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稀土修饰铁碳材料对糖蜜酒精废水处理效果的研究

Gongye shui chuli, 2020
采用还原铁粉、碳粉、稀土铈及黏结剂等为原料混合制成的Ce-Fe/C复合材料深度处理糖蜜酒精废水，研究了铁碳质量比、稀土铈添加量以及废水处理时间等因素对处理效果的影响。结果表明：以铁碳质量比为5：1，稀土铈添加质量分数为7%制备的Ce-Fe/C复合材料处理糖蜜酒精废水，当反应时间为150 min时，色度去除率达98%以上，COD去除率达70%以上。对制备的复合材料的表征结果表明，稀土元素Ce有效地掺杂到Fe/C材料的晶格中，提高了Fe/C材料的性能。
牛润, 吴烈善, 周阳波, 黄诗蔚, 拜俊岑   +4 more
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Gadolinium‐Induced Activation of CoNiO2 for Efficient Oxygen Evolution: A Structural and Electronic Modulation Approach

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, Rana Muhammad Irfan, Azhar Mahmood, Shamraiz Hussain Talib, Yasir Abbas, Chuhao Liu, Li Niu   +6 more
wiley   +1 more source

Progress and Prospects of Rare Metal‐Based Electrochemiluminescence Sensors for Detection of Water Environmental Pollutants

Rare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT Water pollution is becoming increasingly severe, posing a serious hazard to human health and ecological security. Therefore, it is necessary to develop rapid, sensitive, and universal analytical methods to detect residual pollutants in actual water.
Yi Xing, Ru Wu, Min Zhang, Faliang Cheng, Jun‐Jie Zhu   +4 more
wiley   +1 more source

Does Foreign Investors’ Information Access Vary with Geopolitical Tensions? Evidence from Corporate Conference Calls

Journal of Accounting Research, Volume 64, Issue 1, Page 417-475, March 2026.
ABSTRACT We study how foreign investors’ access to corporate information varies with pairwise geopolitical tensions between the investor's and investee's countries. Using a sample of 1,760 country‐pairs, we find that geopolitical tensions between a conference call host firm's country and a foreign country relate negatively with investor participation ...
YIFEI LU, JOANNA SHUANG WU, YUCHENG (JOHN) YANG   +2 more
wiley   +1 more source

三氯化钐对实验性糖尿病大鼠心肌抗氧化能力的影响

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
doaj