A CORBA-Based Multidatabase System——Panorama Project

0　ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｎｅｅｄｆｏｒｉｎｔｅｇｒａｔｉｏｎｏｆｄｉｆｆｅｒｅｎｔｄａｔａｂａｓｅｍａｎａｇｅｍｅｎｔｓｙｓｔｅｍｓ (ＤＢＭＳｓ) ,ｍａｋｉｎｇｄｉｆｆｅｒｅｎｃｅｓｂｅｔｗｅｅｎｔｈｅｓｅｓｙｓｔｅｍｓｉｎｖｉｓｉｂｌｅａｎｄｐｒｏｖｉｄｉｎｇｕｓｅｒｓｗｉｔｈａｕｎｉｆｏｒｍａｃｃｅｓｓｔｏａｌｌｔｈｅｄａｔａｂａｓｅｓｈａｓｇｒｏｗｎｒａｐｉｄｌｙｄｕｒｉｎｇｔｈｅｌａｓｔｄｅｃａｄｅ .Ｈｏｗｅｖｅｒ,ｄａｔａｂａｓｅａｕｔｏｎｏｍｙａｎｄｈｅｔｅｒｏｇｅｎｅｉｔｙ…     

Studies on ζ-Potential of Positive Sol of Magnesium Aluminum Hydroxide

ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｅｌｅｃｔｒｉｃｐｏｔｅｎｔｉａｌａｔｔｈｅｓｈｅａｒｐｌａｎｅｂｅｔｗｅｅｎｔｈｅｃｈａｒｇｅｄｓｕｒｆａｃｅａｎｄｅｌｅｃｔｒｏｌｙｔｅｓｏｌｕｔｉｏｎｉｓｃａｌｅｄζ－ｐｏｔｅｎｔｉａｌ．Ｗｈｅｎζ＝０，ｔｈｅｐＨ...     

Synthesis and Crystal Structure of 5-N-i-Propyl-2-(2′-nitrobenzenesulfonyl)-glutamine

IntroductionAcetohydroxy acid synthase(AHAS) is a perfecttarget for the design of environmentally benign herbi-cides because it is a key enzyme that is absent in ani-mals but is important for the biosynthesis of branched-chain amino acids in plants[1,2]. …     

Electrochemical Probe of Hydroxylation of 4-Nitro-phenol by Cytochrome C with Hydrogen Peroxide

ＥｌｅｃｔｒｏｃｈｅｍｉｃａｌＰｒｏｂｅｏｆＨｙｄｒｏｘｙｌａｔｉｏｎｏｆ４┐Ｎｉｔｒｏ┐ｐｈｅｎｏｌｂｙＣｙｔｏｃｈｒｏｍｅＣｗｉｔｈＨｙｄｒｏｇｅｎＰｅｒｏｘｉｄｅ＊ＺＨＵＹｉ－ｍｉｎ,ＷＡＮＧＪｉｎ－ｃｈｅｎｇ＊＊,ＬＩＪｉｎｇ－ｈｏｎｇａｎ...     

奥唑嗪盐酸口服液的药理学实验研究

目的通过对奥唑嗪(AZQ)口服液进行初步的药理学实验观察,确定其对支气管哮喘的治疗作用.方法采用药理学实验方法,将200只小鼠随机分成4组,每组50只,各组分别设置中药奥唑嗪大剂量组(200mg/kg)、中剂量组(100mg/kg)、小剂量组(50mg/kg)3个剂量组、阳性对照组(抗炎为醋酸可的松;止咳为蛇胆川贝液;祛痰为氯化铵;平喘为氨茶碱)及生理盐水对照组,分别对其进行抗炎、止咳、祛痰、平喘等药效学观察.结果奥唑嗪口服液100mg/kg和50mg/kg剂量组对抗炎有一定作用;50mg/kg剂量组对止咳有显著作用;70mg/kg和100mg/kg剂量组对祛痰有显著疗效;100mg/kg和50mg/kg剂量组对平喘有明显作用.结论奥唑嗪口服液对抗炎、止咳、祛痰、平喘有一定疗效,可以开发研制为二类新药.     

Cloning of Promoter of Chinese Bean GRP 1.8 Gene and Characterization of Its Function in Transgenic Tobacco Plants

IntroductionVascular cells that are determined to becometracheary elements undergo a very distinct celldifferentiation.In contrast to many other types ofplant cells that can dedifferentiate and evenultimately form a new plant,cells determined tobecome tracheary elements are programmed to die.Glycine- rich proteins belong to a class ofstructural cell wall proteinsthatcontain about60 %glycine on the molar basis. Glycine- rich proteinsare localized in cell walls of bean[1] .Glycine- richprotein1…     

Temperature Field and Microstructural Formation of Semi-Solid AlSi7Mg Alloy

The microstructural formation of the semi-solid AlSi₇Mg alloy stirred by electromagnetic field is investigated together with the tempeatre field of the stirred melt at continuously cooling. A important kinetic factor for primary α-Al nucleation is proposed. It is found that a low temperature gradient exists in the electromagnetic stirred melt. This is why the first dendritic arms and secondary dendritic arms are refined. Experimental results also show that the root remelting of secondary dendritic arms is an important mechanism for the primary α-Al refmement. Strong electromagnetic stirring greatly reduces the composition supercooling in the melt and eliminates preferring growth of the first dendritic arms. Therefore, many rosettes or spherical Primary α-Al phase particles form finally.     

Catalytic Effect of Cobalt and Iron Complexes Incorporating Bis(2-aldiminoethyl)amine Ligands on Ethylene Oligomerization

IntroductionThe finding of a new promising family ofFe( ) - and Co( ) - based bis( imino) pyridyl cata-lysts for ethylene polymerization and oligomeriza-tion,discovered by Brookhart,Gibson andcoworkers[1— 3 ] ,has intrigued us into researchingthe preparation,the structure and the chemistry ofiron and cobalt complexes incorporating N,N ,N -tridentate ligands.The spectacular enhancement ofthe reactivity of iron and cobalt complexes towardsZiegler- Natta olefin polymerization has been re-po…     

Thermal effect of the cable-stayed bridge tower

0　IntroductionXiantaoHanjiangRiverHighwayBridgelocatesonnorth westsuburbofXiantaocity ,crossesovertheHanjiangRiv er.Thecable stayedbridgeisasingle towersystemwiththespansof (5 0 + 82 + 180 )m .Thenon symmetricalstructureisusedheresothatthemainpiercankeepoffthemainchannel.Thesectionofthegirderisnotconstantinorderthatthedeadloadcanbeinbalancealthoughthespansaredifferent.Thedeckwidthis 2 3m (notincludingthewidthofthecablelane) ,laterallayoutisthatofdouble directionfour lanewithoutsidewalk ,b…