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《中国化学快报》1993,(6)
[Ni(TIM)]~(2+)can act as a catalyst in bromate—gallic acid—sulfuric acid system to produce sequentialoscillations have been studied.When bromate solution is added to the reaction mixture,two sets of concen-tration oscillations take place,the first set is the noncatalyzed oscillation and the second is[Ni(TIM)]~(2+)catalyzed oscillation. 相似文献
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SELECTIVE HYDROGENATION OF BENZALDEHYDE TO CYCLOHEXANEMETHANOL CATALYZED BY SILICA-SUPPORTED CARBOXYMETHYL CELLULOSE-PLATINUM COMPLEX 总被引:1,自引:0,他引:1
SELECTIVEHYDROGENATIONOFBENZALDEHYDETOCYCLOHEXANEMETHANOLCATALYZEDBYSILICA-SUPPORTEDCARBOXYMETHYLCELLULOSE-PLATINUMCOMPLEX¥Li... 相似文献
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STUDY OF THE FLUORESCENCE SYSTEM OF RIBONUCLEIC ACID-Tb(Ⅲ) AND THE DETERMINATION OF RIBONUCLEIC ACID
《中国化学快报》1995,(2)
STUDYOFTHEFLUORESCENCESYSTEMOFRIBONUCLEICACID-Tb(Ⅲ)ANDTHEDETERMINATIONOFRIBONUCLEICACID¥JingHeYANG;ChangLunTONG;NianQinJIE;Ho... 相似文献
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The polystyrene supported glutamic acid Schiff base complex of Mn ( Ⅱ ) (PS-Sal-Glue-Mn) was prepared with chloromethylated styrene polymer beads, 2,4-dihydroxybenzaldehyde, L-glutamic acid and manganese ( Ⅱ ) acetate tetrahyrate. The polymeric ligand and the complex were characterized by FT-IR, small area X-ray photoelectron spectroscopy (XPS) and 1CP-AES. In the presence of the manganese complex, cyclohexene (1) was effectively oxidized by molecular oxygen without reductant. The major products of the reaction were 2-cyclohexen-l-ol (2), 2-cyclohexen-l-one (3) and 2-cyclohexen-1- hydroperoxide (4), which was different with typical oxidation of cyclohexene. The influence of reaction temperature and additive for oxidation had been studied. The selectivity of 2-cyclohexen-1-hydroperoxide varied with reaction time and different additives. The mechanism of cyclohexene oxidation had also been discussed. 相似文献
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ELECTRON-TRANSFER IN POLYNUCLEAR CYANO-BRIDGED COMPLEX OF THE TYPE[Co(Ⅲ)L_3-μ-Nc-Fe(Ⅱ)(CN)_5]~-(L=en
《中国化学快报》1994,(11)
ELECTRON-TRANSFERINPOLYNUCLEARCYANO-BRIDGEDCOMPLEXOFTHETYPE[Co(Ⅲ)L_3-μ-Nc-FeⅡ)(CN)_5]~-(L=en)ShuZhongZHAN;XiaoYuanCHEN;QingJin?.. 相似文献
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ZHAOXiaobin HEBinglin 《反应性高分子(英文版)》1992,1(2):164-174
Alginate-Cu(Ⅱ)complex beads or membranes were prepared for removal of urea.The mechanism of sorption of urea was identified by UV-Visible spectra,FT-IR spectra and Far-Infrared spectra.The factors affecting the urea sorption capacity were discussed in detail.Results showed that the Alginate-Cu(Ⅱ)complex sorbent can sorb about 60 my urea per gram of sorbent at 37℃ and the concentration of urea was 130mg/100ml in Na2HPO4 and NaH2PO4 buffer solution(pH=7.0). 相似文献
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PREPARATIONOFBAGASSEXANTHATES(BX)ANDNICKELREMOVALFROMWASTEWATERBYBXZhongChanggeng;TangDonggong;ChenQiaoyun(DepartmentofChemis... 相似文献
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《中国化学快报》1991,(8)
A high performance liquid chromatographic assay has been developed for the simultaneous determination of five water soluble vitamins:thimine, riboflavin, niacin, pyridoxine and folic acid in cereal products and fresh vegetables. Food samples were hydrolyzed in 0.4 mol/L HCl, autoclaved at 120℃ 15 psi for 20 minutes, using a μ-Bondapak column (3.9×300mm, Waters Co.), a mobile phase of methanol-water (30:70) (0.005 mol/L heptanesulfonic acid) and a flow rate of 1.0 ml/min gave the most satisfactory separation of the five water soluble vitamins. A double channel deteetion was used: four vitamins (B_5, folic acid, B_2, B_1) were detected hy UV spectrophotometry (254 nm) first, pyridoxine (B_6) was detected by fluoromelry (EX 290nm, EM 395 nm) afterwards. Detection limits were 2, 5, 5, 2and 5ng, linear ranges were 5-10ng, 5-50ng, 5-40ng, 5-50ng and 10-50ng for B_1, B_2, B_5, B_6 and folic acid respectively. Recoveries were 92-100%(B_5), 51-52% (folio acid), 103—105% (B_2), 99—100% (B_6) and 91.3—102% (B_1) respectively. In comparison with a reference method and checking with food composition tables, very satisfactory results were obtained by this method. 相似文献