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SYNThESIS, ChARACTERIZATION AND SPECTROSCOPIC INVESTIGATION OF PYRAZINOPORPhYRAZINE NETWORK POLYMER-SUPPORTED METAL (Ⅱ)-bASED CATALYSTS

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Chinese Journal of Polymer Science 2013年第2期31卷 242-250页

作者： h.h. Abdel-Razik b.h. Asghar E. Kenawy Chemistry Department Faculty of Science Mansoura University Chemistry Department Faculty of Science Taif University Chemistry Department Faculty of Applied Sciences Umm Al-Qura University Chemistry Department Polymer Research Group Faculty of Science Tanta University

Chloranil through condensation reaction with vicinal diamine such as diaminomaleonitrile produced heterocyclic monomer, p-benzoquinonebis[2,3-b; 2＇,3＇-b＇]pyrazine-5,6-dinitrile. The tetranitrile monomer was cyclo-tetramerised using lithium/pentanol and acetic acid affording the corresponding tetrap-benzoquinone bis[2,3-b; 2＇,3＇-b＇]pyrazinoporphyrazine）]- based network polymer （2h-Pz）. The tetranitril monomer was cyclo-tetramerised using metal salt and quinoline affording the corresponding porphyrazinato-metal II-based network polymers （M-Pz）, M = Co, Ni or Cu. Elemental analytical results, IR and NMR spectral data of the prepared molecules are consistent with their assigned formulations. Molecular masses and metal contents of the synthesized polymers proved to be of high molecular masses which confirm the efficiency of tetramerization polymerization and complexation reactions. The prepared pyrazinoporphyrazines were used as efficient catalysts for the oxidation of thiophenol and benzylthiol to their disulfides in the presence of air atmosphere. The results of oxidation of thiophenol and benzylthiol show that after 15 min the maximum yield of the corresponding disulfides reached 95%, 91%, respectively.

关键词： Pyrazinoporphyrazine Polymer-supported metal (II)-based catalysts Chloranil.

STUDY ON GREY FORECASTING MODEL OF COPPER EXTRACTION RATE WITh bIOLEAChING OF PRIMARY SULFIDE ORE

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Acta Metallurgica Sinica(English Letters) 2007年第2期20卷 117-128页

作者： A.X. Wu Y. Xi b.h. Yang X.S. Chen h.C. Jiang Civil ＆ Engineering School University of Science and Technology Beijing Beijing 100083 China China Nonferrous Engineering and Research Institute Beijing 100038 China School of Resources ＆ Safety Central South University Changsha 410083 China

A model GM （grey model）（1,1） for forecasting the rate of copper extraction during the bioleaching of primary sulphide ore was established on the basis of the mathematical theory and the modeling process of grey system theory. It was used for forecasting the rate of copper extraction from the primary sulfide ore during a laboratory microbial column leaching experiment. The precision of the forecasted results were examined and modified via ＂posterior variance examination＂. The results show that the forecasted values coincide with the experimental values. GM （1,1） model has high forecast accuracy; and it is suitable for simulation control and prediction analysis of the original data series of the processes that have grey characteristics, such as mining, metallurgical and mineral processing, etc. The leaching rate of such copper sulphide ore is low. The grey forecasting result indicates that the rate of copper extraction is approximately 20% even after leaching for six months.

关键词： primary copper sulfide ore bioleaching extraction rate grey theory forecasting model

文山三七地理标志产品种植面积遥感识别数据集(2022)

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全球变化数据学报（中英文） 2024年第1期8卷 58-66,V0058-V0066页

作者：沈佳萍李琪王亚琴刘闯于伯华中国国土勘测规划院北京100035 中国科学院地理科学与资源研究所北京100101

三七是我国常用名贵中药材,也是云南地理标志产品。利用高空间分辨率遥感卫星数据快速监测三七种植位置和范围,对耕地资源科学合理利用、多元化农业结构调整,以及三七产业可持续发展等具有重要意义。本研究基于吉林一号、Pleiades、高... 详细信息

三七是我国常用名贵中药材,也是云南地理标志产品。利用高空间分辨率遥感卫星数据快速监测三七种植位置和范围,对耕地资源科学合理利用、多元化农业结构调整,以及三七产业可持续发展等具有重要意义。本研究基于吉林一号、Pleiades、高分系列、资源系列和北京二号等多源卫星影像,结合国土调查数据中耕地和园地的信息,采用综合调绘法技术,利用实地调查资料和“国土调查云”平台历史资料,研发了2022年云南文山壮族苗族自治州三七种植数据集。数据结果表明:2022年文山三七种植面积约为8,295.75 hm^(2)。空间上,三七种植面积由西南向东北递减。数据集存储为.shp格式,一共包含8个数据文件,共8.25 Mb(压缩为1个文件,4.54 Mb)。

关键词：云南文山遥感监测三七吉林一号国产卫星

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MIGRATORY MEDIA

The World of Chinese 2019年第4期 58-59页

作者： b.h. 不详

bcrlin has become a home base to an array of international artists, writers, and filmmakers--and the Chinese arc no exception. From berlin University of the Arts graduate Shen han, the genre? bending visual artist Xiao'er Liu, to documentary filmmaker and LGbT activist Fan Popo, incrcasing numbers of creative Chinese are drawn to the cosmopolitan city by its affordable (though rising) rents and infamous permissiveness.

关键词： bcrlin a home no exception

Effects of Growth Temperature on Structural and Electrical Properties of Li-N-h Codoped ZnO

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Journal of Materials Science & Technology 2013年第2期29卷 154-156页

作者： Y.F. Lu Z.Z. Ye L.P. Zhu Y.J. Zeng J.Y. huang b.h. Zhao State Key Laboratory of Silicon Materials Department of Materials Science and Engineering Zhejiang University

Effects of growth temperature on the structural and electrical properties of Li-N-h codoped ZnO thin films grown by DC reactive magnetron sputtering were investigated. Scanning electron microscopy and X-ray diffraction results showed that increasing growth temperature could improve the crystalline quality. but hall measurement results showed that growth temperature had a nonlinear influence on the electrical property. The variation of electrical properties with the growth temperature was found to be related to the activated concentration of N in ZnO and the evaporation of Li during the growth process, derived from the hall measurement and the second ion mass spectroscopy measurement.

关键词： ZnO Codoped Growth temperature Structural property Electrical property

在马克思主义哲学原理教学中怎样批判现代资产阶级哲学和社会学

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作者： <苏>b.h.维列尔名徐铁民译

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在马克思主义哲学原理教学中怎样批判现代资产阶级哲学和社会学

作者： (苏)阿申 b.h.德明刘盛际等译

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矿井深部开采非线性力学特点

辽宁工程技术大学学报（自然科学版） 2009年第5期28卷 785-787页

作者： b.h.阿巴林俄罗斯科学院西伯利亚分院矿业研究所俄罗斯新西伯利亚市630091

为了解矿井深部开采过程中大范围非线性应力现象和自组织多分量现象,对采矿诱发地震和岩爆地震的监测方法和体系做了相应的分析,总结了深部采掘工程中岩体非线性力学特点。认为矿井地下巷道岩区碎化现象是由重力应力分量达到或者超过岩... 详细信息

为了解矿井深部开采过程中大范围非线性应力现象和自组织多分量现象,对采矿诱发地震和岩爆地震的监测方法和体系做了相应的分析,总结了深部采掘工程中岩体非线性力学特点。认为矿井地下巷道岩区碎化现象是由重力应力分量达到或者超过岩石的单轴压缩强度形成的。对人工填充体的组织和结构特点进行了分析,并利用岩石分区碎裂现象和自组织人工充填体的相互作用来提高采矿效率。

关键词：矿井深部开采非线性力学特点岩石碎裂人工填充体

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地血香中1个新的三萜类成分

高等学校化学学报 1990年第4期11卷 423-424页

作者：代平韩桂秋 Arison b.h. 北京医科大学药学院 Merck Sharp and Dohme Res. Lab. U.S.A.

地血香系五味子科植物异形南五味子[Kadsura heteroclita(Roxb)Craib]的根或藤茎,民间用于治疗风湿、胃及十二指肠溃疡等。已报道自同属植物分得具有当归酸侧链末端的羊毛甾烯型四环三萜类化合物——安五酸。我们在研究地血香化学成分... 详细信息

地血香系五味子科植物异形南五味子[Kadsura heteroclita(Roxb)Craib]的根或藤茎,民间用于治疗风湿、胃及十二指肠溃疡等。已报道自同属植物分得具有当归酸侧链末端的羊毛甾烯型四环三萜类化合物——安五酸。我们在研究地血香化学成分中,分得化合物(Ⅰ),其光谱与安五酸的光谱相比较,UV、IR、MS、CD谱均相似,~1h

关键词：地血香异安五酸三萜