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Fluorescence Emission from Small Molecules Containing Amino Group

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Chinese Chemical Letters 2006年第4期17卷 502-504页

作者： Dong Jun WANG Dan Dan JIA Yong Guang ZHAO Xi Hai SHEN Yue Dong YANG Hebei Normal University of Science and Technology Department of Chemistry Qinhuangdao 066600

After the treatment of oxygen gas, the small molecules containing amine group could emit fluorescence. Oxidation was believed to play an important role in the formation of fluorescence centers. Compared to previous re... 详细信息

关键词： Fluorescence amine oxidation oxygen.

Studies on the edwardsiellosis and characterization of pathogenic bacteria from diseased flounder (Paralichthys olivaceus L.) and turbot (Scophthalmus maximus L.)

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Acta Oceanologica Sinica 2006年第3期25卷 138-147页

作者： FANG Hai ZHANG Xiaojun CHEN Cuizhen JIN Xiaomin WANG Xiuyun Department of Animal Science Hebei Normal University of Science and Technology Qinhuangdao 066600 China

Edwardsiellosis of flounder and turbot occurring in different mariculture farms during 2001～ 2004 was examined, including the conditions of disease occurrence, clinical signs and pathological changes. The results showed that all diseased fishes expressed bacterial septicaemia. A total of 148 strains were identified using a combination of traditional physiological and biochemical tests and partial 16S rRNA gene analysis. In addition, the mole fraction G ＋ C ratio of the DNA of representative strain of isolates and serum homology were detected, and pathogenicity tests of isolates were conducted by experimental infection. The results revealed that 148 strains were identified as E. tarda of genus Edwardsiella, all the isolates are of serologic similarity, and have strong pathogenicity to flounder and turbot.

关键词： flounder (Paralichthys olivaceus L. ) turbot (Scophthalmus maximus L. ) edwardsiellosis pathogenic bacteria

Preparation and Blood Compatibility of Oxidized-chitosan Films

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Chinese Chemical Letters 2005年第7期16卷 991-994页

作者： YueDongYANG JiuGaoYU YongGuoZHOU PeiGuoLI DepartrnentofChemistry HebeiNormalUniversityofScience＆TechnologyChangli066600／／DepartmentofChemistrySchoolofScienceTianjinUniversityTianjin300072 DepartmentofChemistry SchoolofScienceTianjinUniversityTianjin300072 DepartmentofChemistry HebeiNormalUniversityofScience＆TechnologyChangli066600

Chitosan membrane was modified by the selective oxidization of chitosan molecules on its surface with NO2 gas. FTIR spectra indicated there were plenty of –COOH and –COO- groups on the modified membrane surface. The SEM study showed the modified membrane surface was rough rather than smooth as chitosan membrane. All antithrombosis test, hemolysis test and blood cell morphology observation with SEM revealed that modified chitosan membranes have superior blood compatibility to chitosan.

关键词： Chitosan blood compatibility modified chitosan membrane nitrogen dioxide.

First isolation and characterization of a new species of Vibrio from diseased flounder(Paralichthys olivaceus Temminck et Schlegel)

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Acta Oceanologica Sinica 2005年第3期24卷 131-140页

作者： ZHANGXiaojun FANGHai CHENCuizhen ZHANWenbin JINXiaomin WANGXiuyun DepartmentofAnimalScience HebeiNormalUniversityofScienceandTechnologyQinhuangdao066600China LaboratoryofPathologyandImmunologyofAquaticAnimals KeyLaboratoryofMaricultureofMinistryofEducationOceanUniversityofChinaQingdao266003China

Appropriate pathogenic bacteria were isolated from diseased (or dead) flounder (Paralichthys olivaceus L) occurring in a mariculture farms of Qinhuangdao, which all diseased fishes expressed bacterial septicaemia. The phenotypic information of the 12 pure cultures was studied extensively, including morphological characteristics, colony characteristics in different media, physiological and biochemi- cal characteristics, and the mole fraction G+C ratio of the DNA for representative strain. The results show that the isolates belong to a new species of Vibrio, and are designated as Vibrio qinhuangdaora ***. by the area from which the diseased flounders are collected (Qinhuangdao) based on its biological properties following Rules of International Code of Nomenclature of Bacteria. At the same time, studies on the serum homology of isolates, and pathogenicity of isolates were conducted by experimental infection. The results show that all the isolates are of serologic similarity, and the isolates have strong pathogenicity to flounder. The studies can extensively reflect the main biological properties of this new species of Vibrio.

关键词： flounder (Paralichthys olivaceus L) Vibrio qinhuangdaora sp. nov. biological properties

Rapid Fabrication of Hollow SiO2 Spheres with Novel Morphology

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Chinese Chemical Letters 2003年第12期14卷 1306-1308页

作者： DongJunWANG QunLUO DanDanJIA XiaoDongLI XinQiouWANG YongHuang ZhenZHEN XinHouLIU TechnicalInstituteofPhysicsandChemistry ChineseAcademyofSciencesBeijing100101 HebeiVocation-technicalTeacher‘sCollege Qinhuangdao066600

The hydrolysis of tetraethoxysilane (TEOS) occurred on the surface of poly(methyl methacrylate) (PMMA) microshperes immediately after these microshperes were prepared in TEOS. Micron-sized hollow SiO2 spheres were obtained by calcination of the coated PMMA microshperes. It was found that the final hollow spheres were constituted by small SiO2 particles.

关键词： Hollow SiO2 spheres PMMA microshperes rapid fabrication.

Effects of two Saccharomyces cerevisiae strains on physicochemical and oenological properties of Aranele white wine

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Food Bioscience 2023年第2期52卷 1314-1323页

作者： Ling Qin Meifeng Huang Yunqing Ma Dongsheng Zhang Yanzhi Cui Wenhuai Kang College of Food Science and Biology Hebei University of Science and TechnologyShijiazhuang050018China Hebei Wine Industrial Technology Institute Qinhuangdao066600China Longus Vineyard Co. Ltd.Qinhuangdao066600China

Aranele is a suitable and excellent wine grape variety in Changli County,which is an important wine-producing region in *** this study,the effects of two different yeast strains on organic acids,phenolic compounds,amino acids,and aroma compounds during Aranele white wine fermentation were *** cerevisiae QA23 required longer times to ferment grape must compared to *** OKAY^(TM).Tartaric acid was predominant among organic acids,accounting for over 40%of total acids *** amino acids,arginine,tyrosine and phenylalanine decreased notably,while proline increased considerably during ***,the contentraion of esters(e.g.,ethyl octanoate,ethyl caprate),alcohols(e.g.,phenethyl alcohol,pentanol),and acids(e.g.,hexanoic acid,octanoic acid)increased considerably during ***,total phenolic content in wines fermented with QA23 was higher than the OKAY^(TM)fermented *** the effects of Saccharomyces cerevisiae QA23 and OKAY^(TM)on the fermentation of Aranele grapes could be advantageous for commercial winemaking in wine-producing regions in China.

关键词： Aranele wine Organic acids Amino acids Aroma compounds Phenolic compounds

Non-isothermal decomposition kinetics and lifetime of Tb2(0-MBA)6(PHEN)2

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Rare Metals 2003年第3期22卷 155-159页

作者： ZHANGJianjun BAIJihai WANGRuifen WANGShuping LIJibiao ExperimentalCenter NormalUniversityShijiazhuang050016China DepartmentofComputer HebeiNormalCollegeofScienceandTechnologyChangli066600China DepartmentofChemistry HebeiNormalUniversityShijiazhuang050091China

The thermal decomposition of Tb_2(O-MBA)_6(PHEN)_2 (O-MBA: o-methylbenzoate;PHEN: 1,10-phenanthroline) and its kinetics were studied under the non-isothermal condition bythermogravimetry-derivative thermogravimetry (TG-DTG) techniques. Kinetic parameters were obtainedfrom analysis of TG-DTG curves by the Achar method and the Madhusudanan-Krishnan-Ninan (MKN) *** most probable mechanism function was suggested by comparing the kinetic parameters. The kineticequation for the first stage can be expressed as dα/dt = Aexp(-E/RT)·3(1 - α)^(2/3). Thelifetime equation at mass loss of 10% was deduced as lnτ= -28.7429 + 19797.795/T by isothermalthermogravimetric analysis.

关键词： thermochimica non-isothermal kinetics TG-DTG terbium complex O-methylbenzoate 1,10-phenanthroline

Non-isothermal Decomposition Reaction Kinetics of the Magnesium Oxalate Dihydrate

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Chinese Journal of Chemistry 2006年第3期24卷 360-364页

作者：张建军任宁白继海 Experimental Center Hebei Normal University Shijiazhuang Hebei 050016 China Department of Computer Hebei Normal University of Science and Technology Qinhuangdao Hebei 066600 China

The thermal decomposition of the magnesium oxalate dihydrate in a static air atmosphere was investigated by TG-DTG techniques. The intermediate and residue of each decomposition were identified from their TG curve. The kinetic triplet, the activation energy E, the pre-exponential factor A and the mechanism functionsf（a） were obtained from analysis of the TG-DTG curves of thermal decomposition of the first stage and the second stage by the Popesou method and the Flynn-Wall-Ozawa method.

关键词： magnesium oxalate dihydrate thermal decomposition kinetics thermogravimetry-differential thermogravimetry Popescu method

Non-isothermal Kinetics of the First-stage Decomposition Reaction of Cobalt Oxalate Dihydrate

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Chemical Research in Chinese Universities 2005年第4期21卷 501-504页

作者： ZHANGJian-jun RENNing BAIJi-hai ExperimentalCenter HebeiNormalUniversityShijiazhuang050016P.R.China DepartmentofComputer HebeiNormalUniversityofScience＆TechnologyQinhuangdao066600P.R.China

Solid state kinetics has been extensively studied by means of thermalanalysis *** aim of the study is to determine the mechanism functionf(alpha),the activationenergy E and the pre-exponential factor *** recent years there have been many methods of processingthermal analysis kinetic *** the present work,the thermal decomposition mechanism of CoC_2O_4centre dot 2H_2O and the non-isothermal kinetic data were analyzed with the Popescu method,namely,avariant of the Flynn-Wall-Ozawa *** method is used to analyze the degrees of conversion ofseveral TA curves at the same temperature and different heating rates.

关键词： Cobalt oxalate dihydrate Non-isothermal kinetics Thermal decomposition TG-DTG