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Thermodynamic Aspect in Synthesis of AlN Powders by Carbothermal Reduction and Nitridation Process

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Journal of Materials Science & Technology 1999年第1期15卷 13-16页

作者： Dai, XM Li, QF Ding, mq Tian, JM Tsing Hua Univ Beijing Fine Ceram Lab State Key Lab New Ceram & Fine Proc Beijing 102201 Peoples R China

A thermodynamical calculation shows that AlN powders were synthesized in the process by the overall reaction Al2O3(s)S+3C(s)+N-2(g)=2AlN(s)+3CO(g) and its minimum reaction temperature T-0=1852 K, if all reactants and products were in standard states. In the practical experiments, AlN phase appeared obviously at only 1300 degrees C, the major reasons are related to the partial pressure of its gaseous product p(co) and the mixed free energy. The synthesis temperature could be towered by either increasing N-2 flow rate or elevating N-2 pressure. On the other hand, as the temperature decreases, the equilibrium constant K-m also reduces, and the reducing rate strongly depends on the temperature: the lower the temperature, the higher the rate.

关键词： Aluminum compounds

Two new diterpenoids from Isodon eriocalyx

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Chinese Chemical Letters 1999年第1期10卷 31-32页

作者： Chen, NY Tian, mq Wu, R Sun, HD Li, CM Lin, ZW Lanzhou Univ Natl Lab Appl Organ Chem Lanzhou 730000 Peoples R China Acad Sinica Kunming Inst Bot Lab Phytochem Kunming 650204 Peoples R China

Two new diterpenoids, maoecrystal U and epi-maoecrystal P were isolated from the leaves of Isodon eriocalyx. Their structures were determined as 6 beta-acetoxy-15 beta-hydroxy-3 alpha, 20epoxy-ent-kaur-16-ene-1,7-dione 1 and 16 (s)-methoxymethyl-6 beta,7 beta-dihydroxy-7 alpha,20-epoxy-ent-kaur-2,3-ethenylene-1, 15-dione 2 respectively, by spectroscopic methods.

关键词： Isodon eriocalyx ent-kaurenoids maoecrystal U epi-maoecrystal P

Folding patterns of chromatin in chicken erythrocyte studied by using AFM and TEM

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Chinese Science Bulletin 1998年第4期43卷 289-291页

作者： Liu, ZX Zhou, MY Xie, HY Qian, RL Zhang, Y Hu, J Li, mq Chinese Acad Sci Shanghai Inst Cell Biol Shanghai 200031 Peoples R China Chinese Acad Sci Shanghai Inst Nucl Res Shanghai 201800 Peoples R China

Four folding patterns (～15, ～30-40, ～60 and ～90-110 nm) of the higher_order structure of chromatin in chicken erythrocytes have been observed with an atomic force microscope (AFM) under near natural conditions. Results showed that the chromatin in the interphase nucleus of chicken erythrocyte was not in a disorganized form but represented a higher_order conformation. The thin sections of the chromatin in the nucleus of chicken erythrocyte were examined with a transmission electron microscope (TEM). Compared with TEM, AFM had the advantages that the samples did not need the preparation procedures such as fixing, sectioning and staining, and thus were closer to their native condition.

关键词： chromatin structure nucleus of chicken erythrocyte AFM TEM.

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反映人类肿瘤增殖和生长情况...

国外医学（生理病理科学与临床分册） 1991年第2期11卷 104-105,102页

作者： Ceci.,mq 何丹

维普期刊数据库评论

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维普期刊数据库

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团结一致——《鲁滨逊漂流记》

疯狂英语（新读写） 2017年第10期 21-26,45,46页

作者： mq

本篇适合:模仿、角色扮演电影《鲁滨逊漂流记》(Robinson Crusoe)改编自英国作家丹尼尔·笛福的同名小说。

关键词：鲁滨逊《鲁滨逊漂流记》 Mac 过去式

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敢于追梦——《了不起的菲丽西》

疯狂英语（新读写） 2017年第11期 20-25,46页

作者： mq

《了不起的菲丽西》(Ballerina)是由法国和加拿大联合出品的动画电影。影片讲述了从小在孤儿院长大的小女孩菲丽西(Felicie)一心想要成为一名芭蕾舞者,为了实现这个梦想,她和渴望成为发明家的小伙伴维克托(Victor)结伴逃离孤儿院,勇闯... 详细信息

《了不起的菲丽西》(Ballerina)是由法国和加拿大联合出品的动画电影。影片讲述了从小在孤儿院长大的小女孩菲丽西(Felicie)一心想要成为一名芭蕾舞者,为了实现这个梦想,她和渴望成为发明家的小伙伴维克托(Victor)结伴逃离孤儿院,勇闯巴黎的故事。在巴黎,菲丽西遇见了具有舞蹈经验但因腿伤无法继续跳舞的剧院清洁工奥黛特(Odette),舞技高超却高傲自大的富家女卡米耶(Camille),还有富有才华。

关键词：芭蕾舞剧跳起来《胡桃夹子》胡桃夹子第三人称单数克拉拉