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The Appliance of Rare Earth in Modern Chemical New Materials

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The Appliance of Rare Earth in Modern Chemical New Materials

Effectiveness of Combined Testosterone Undecanoate with Tamoxifen Citrate Treatment in Men with Idiopathic Azoospermia or Serious Oligozoospermia

第六届国际稀土开发与应用研讨会

作者： De ZHENG Yang HE Jun CHEN Yu-ying qian guangdong Winner Functional Materials Co. Ltd FoShan 528521

＜正＞rare earth element and its compounds have unique electrical,optical, magnetic,thermal and other *** can be widely used in many industries of the national *** paper introduces an overview of rare earth industry,its importance in China and its application in the modern chemical new materials,with a focus on the application and development in polymer *** it points out that the development of the new materials,accords with the requirements of the national circular economy,and resolves our country’s problems of the excess of lanthanum, cerium rare earth and the imbalance in their *** development can also help to forge the new material chemical industrial chain,originally created by China. Thus the new chain may in turn provide relevant products and technical support for the national industries,and transform the advantage of China’s rare earth resources into that of macro- industry and economy.

关键词： rare earth new materials polymer functional additives

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Journal of Reproduction and Contraception 2012年第4期23卷 254-258页

作者： Bo SONG Wei-ping qian guangdong Key Lab. Male Reproductive Medicine & Genetics Reproductive Medicine Department Shenzhen Hospital Peking University

Objective To assess the effect of treatment with a combination of the tamoxifen citrate and testosterone undecanoate on sperm variables in men with idiopathic azoospermia or oIigozoospermia. Methods Four men with idiopathic azoospermia and 8 men with idiopathic oligozoospermia were collected in this retrospective and self control trial. All patients were treated with testosterone undecanoate of 80 mg/d and tamoxifen citrate of 20 mg/d. Sperm characteristics and pregnancy incidence were measured every month during 4 months medication. Results Tamoxifen citrate plus testosterone undecanoate treatment produced a satisfactory improvement of total sperm number, motility after 2 and 3 months whereas serum FSH, LH levels increased after 2 or 3 months. Conclusion The combination of tamoxifen citrate with testosterone undecanoate could improve significantly sperm count. The combination could be used in men with idiopathic azoospermia or serious oligozoospermia.

关键词： testosterone tamoxifen citrate oligozoospermia azoospermia

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基于响应面法的高强钢拉深模具型面设计研究

热加工工艺 2015年第5期44卷 134-138页

作者：赵青杨斌钱广东陈炜江苏大学机械工程学院江苏镇江212013

高强钢可以满足车身轻量化碰撞安全性要求,但低伸长率和高抗拉强度使其成形困难,并伴随较大的回弹。采用Box-Behnken实验,建立了厚度减薄和回弹的多目标响应面回归模型,研究了拉深模具型面参数对拉深质量的影响,并采用基于整体满意度准... 详细信息

高强钢可以满足车身轻量化碰撞安全性要求,但低伸长率和高抗拉强度使其成形困难,并伴随较大的回弹。采用Box-Behnken实验,建立了厚度减薄和回弹的多目标响应面回归模型,研究了拉深模具型面参数对拉深质量的影响,并采用基于整体满意度准则的非线性多目标优化方法对模面参数进行优化。通过冲压试验,验证了模面设计的有效性。

关键词：高强钢拉深模具型面响应面法满意度准则

元素掺杂对钠离子电池锰基层状氧化物相变的影响

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Science China Materials 2023年第12期66卷 4542-4549页

作者：江浩然钱广东刘瑞刘伟迪陈亚楠胡文彬 School of Materials Science and Engineering Tianjin UniversityTianjin 300072China School of Materials Science and Engineering Shandong University of Science and TechnologyQingdao 266590China Australian Institute for Bioengineering and Nanotechnology The University of QueenslandBrisbaneQueensland 4072Australia

由于对可再生能源和清洁能源需求的空前增长,以及锂资源的短缺和分布不均,钠离子电池作为有竞争力的替代品越来越受到关注.钠离子层状氧化物材料,特别是锰层状氧化物材料,如P2-Na_(x)MnO_(2),P′2-Na_(x)MnO_(2),P2-Na_(0.67)Ni_(0.33)M... 详细信息

由于对可再生能源和清洁能源需求的空前增长,以及锂资源的短缺和分布不均,钠离子电池作为有竞争力的替代品越来越受到关注.钠离子层状氧化物材料,特别是锰层状氧化物材料,如P2-Na_(x)MnO_(2),P′2-Na_(x)MnO_(2),P2-Na_(0.67)Ni_(0.33)Mn_(0.67O2),O3-NaNi_(0.5)Mn_(0.5O2)等,具有结构简单、易于合成的优点,因此表现出较高的商业化生产可行性.然而,这些材料普遍面临的挑战是不可逆相变引起的不良循环性能.元素掺杂是抑制不可逆相变,改善材料性能的有效策略.本文综述了锰基层状氧化物材料中元素掺杂的研究进展,并探讨了元素掺杂对晶体结构和结构演化的影响.

关键词： manganese-based layered oxide element doping phase transitions sodium-ion batteries cathodes

A SURVEY ON ENGLISH MAJORS' ATTITUDES TOWARDS LEARNER AUTONOMY

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Chinese Journal of Applied Linguistics 2006年第5期29卷 66-74,128页

作者：亓淑君李倩山东农业大学广东外语外贸大学

Learner autonomy (LA) has attracted more and more attention especially in the western world since 1970s. In recent years, a considerable number of Chinese researchers have begun to show great interest in LA. However, research on LA with Chinese students has not yet come to any definite conclusion about the applicability of LA in the local context. This study aims to elicit some useful information based on the investigation of Chinese students' attitudes towards LA. The questionnaire is composed of 24 statements, concerning the students' attitudes and perception towards language learning, teachers' and learners' roles, and perception of their capability in language learning. The results indicate that students show positive attitudes towards LA; they have a general desire to be involved in the language learning process and believe in the value of effort and self-discipline. The paper then, based on the results of the study, puts forward a few tentative suggestions as to how to facilitate the development of LA in Chinese pedagogical context. Teachers should transfer more power to students in classroom, and provide more room for student involvement in language teaching. Meanwhile, it is essential to raise students' awareness for Autonomous Language learning (ALL) and enhance their abilities in doing so.

关键词： learner autonomy Autonomous Language Learning self-management cooperative learning

Human leukocyte antigen and donor-specific antibodies in liver transplantation

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World Journal of Gastroenterology 2025年第2期31卷 157-160页

作者： Qimudesiren Sha-Na Chen Li-Ren qian School of Clinical Medicine Inner Mongolia Minzu UniversityTongliao 028000Inner Mongolia Autonomous RegionChina Department of Hematology International Mongolian Hospital of Inner MongoliaHohhot 010065Inner Mongolia Autonomous RegionChina Senior Department of Hematology The Fifth Medical Center of PLA General HospitalBeijing 100071China The Second School of Clinical Medicine Southern Medical UniversityGuangzhou 510515Guangdong ProvinceChina

In this article,we comment on an article published in a recent issue of the World Journal of *** specifically focus on the roles of human leukocyte antigen(HLA)and donor-specific antibodies(DSAs)in pediatric liver transpl-antation(LT),as well as the relationship between immune rejection after LT and ***,LT remains the standard of care for pediatric patients with end-stage liver disease or severe acute liver ***,acute and chronic re-jection continues to be a significant cause of graft dysfunction and *** mismatch significantly reduces graft survival and increases the risk of acute *** them,D→R one-way mismatch at three loci was significantly related to graft-versus-host disease incidence after *** adverse impact of HLA-DSAs on LT recipients is already ***,the evaluation of HLA and DSA is crucial in pediatric LT.

关键词： Liver transplantation Human leukocyte antigen Donor-specific antibodies De novo donor-specific antibody Antibody-mediated rejection

肥大细胞和组胺与十二指肠球部溃疡发病的关系

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广州中医学院学报 1989年第4期6卷 214-217页

作者：周福生吴谦广州中医学院脾胃研究室广东省药物研究所

本文检测了十二指肠球部溃疡患者和慢性浅表性胃炎患者及正常人球、胃粘膜内肥大细胞和组胺的实验指标.结果显示治疗前球部溃疡活动期患者的肥大细胞病理形态改变与正常人有差别,与慢性胃炎患者也有程度上的不同;而且脱粒细胞数量高于... 详细信息

本文检测了十二指肠球部溃疡患者和慢性浅表性胃炎患者及正常人球、胃粘膜内肥大细胞和组胺的实验指标.结果显示治疗前球部溃疡活动期患者的肥大细胞病理形态改变与正常人有差别,与慢性胃炎患者也有程度上的不同;而且脱粒细胞数量高于正常人和慢性胃炎患者(P<0.001)。说明球部溃疡活动期患者球、胃粘膜内肥大细胞处于高度活化脱粒状态.治疗后溃汤愈合,肥大细胞由脱粒型转变为接近正常人的静止型细胞,脱粒细胞数量下降(P<0.001),部分组胺值高的患者治疗后组胺值下降(P<0.05).提示肥大细胞的病理形态学改变可能是球部溃疡重要的发病机制之一,同时部分球部溃疡患者的发病及愈合过程也可能与局部组胺含量增高变化有关。

关键词：十二指肠溃疡肥大细胞组胺