IMMOBILIZATION OF GLUCOSE OXIDASE AND CELLULASE BY CHITOSAN— POLYACRYLIC ACID COMPLEX

This study is concerned with chitosan-polyacrylic acid complex as a carrier to immobilize glucose oxidase (GOD)and cellulase. The optimum emperature of the immobilized GOD (IG) was determined to be 60℃which is higher than that of the native GOD about 40℃. The optimum temperature of the immobilized cellulase (IC) was determined to be about 30℃higher than that of native cellulase. Both of the optimum pH of IG and IC shifted one pH unit to acid. Immobilized enzyme may be used in more wide pH range. Their storage life are much longer compared with their native states. Both of them can be reused at least 12 times.     

STUDIES ON IMMOBILIZED GLUCOSE OXIDASE BY DIETHYLAMINOETHYL CELLULOSE COMPLEXES

The properties of immobilized glucose oxidase (GOD) by the complexes of diethylaminoethyl cellulose(DEAEC) with different polymers, such as polymethylacrylic acid (PMAA), polyacrylic acid (PAA), polystyrene sulfonic acid (PSSA), polyvinylaleohol (PVA), polyethylene oxide (PEO) and styrene-maleic acid copolymer (PSMA) were investigated. The activity of immobilized GOD was obviously influenced by the component of the DEAEC complexes. The relative activity of the immobilized GOD reached to maximum and over 90% of the native GOD. when the DEAEC-PMAA DEAEC-PAA complexes were used as a carrier with the molar ratio of DEAEC and polyacid of about one. Michaelis constants (Km) of the immobilized enzymes of DEAEC-GOD-PMAA and DEAEC-GOD-PAA were determined to be 1.25 and 1.00, respectively. Moreover, the immobilized GOD has a good storage stability and cyclic life.     

STUDY ON STRUCTURE AND BOND CHARACTER OF SAMARIUM COMPLEX WITH β-ALANINE

The structure and properties of Sm complex with β-alanine have been studied by quantum chemical calculation, The theoretical result agree well with the experimental ones obtained in studies on rare earth complexes with amino acids.     

CYCLOPROPANATION OF ENAMINE AND ETHYL DIAZOACETATE CATALYZED BY COPPER COMPLEX

ＣＹＣＬＯＰＲＯＰＡＮＡＴＩＯＮＯＦＥＮＡＭＩＮＥＡＮＤＥＴＨＹＬＤＩＡＺＯＡＣＥＴＡＴＥＣＡＴＡＬＹＺＥＤＢＹＣＯＰＰＥＲＣＯＭＰＬＥＸ￥ＭＩｎＷＡＮＧ，ＭｉｎｇＡｎＷＡＮＧ，ＢｉｎｇＦａｎｇＨＵ（ＤｅｐａｒｔｍｅｎｔｏｆＡｐｐｌｉｅｄＣｈａｍｉｓ...     

PHOTOCATALYTIG DECOMPOSITION OF METHANOL BY VC1_2 AND TRANSFER OF HYDROGEN AND METHYL FREE RADICALS

The photocatalytic decomposition of methanol in the presence of vanadium dichloride and the transfer of hydrogen and methyl free radicals to the additives and dinitrogen were reported.     

ADSORPTION OF CAFFEINE BY HYDROGEN DONATING ADSORBENTS BASED ON HYDROGEN BONDING

1. INTRODUCTIONHydrogen bonding is a useful mechanism for adsorptive separation. The low enemy of thisbond ensures reversibility, while the directionality and the short range of this bond conferselectivity. The adsorption of hydrogen donating solutes onto an adsorbent capable of acceptinghydrogenedmberlite XAD-7, an adsorbent consisted of polycarboxylic ester--based onhydrogen bonding has been examined in detail 11-41. However, the adsorption of hydrogenaccepting solutes onto polymeric a…     

SYNTHESIS AND CHARACTERIZATION OF AMINO－ACID SCHIFF BASE AND ITS GERMANIUM COMPLEX

ＳＹＮＴＨＥＳＩＳＡＮＤＣＨＡＲＡＣＴＥＲＩＺＡＴＩＯＮＯＦＡＭＩＮＯ－ＡＣＩＤＳＣＨＩＦＦＢＡＳＥＡＮＤＩＴＳＧＥＲＭＡＮＩＵＭＣＯＭＰＬＥＸ￥ＤｏｎｇＭａＩＣＡＩ；ＷｕＪｕＬＩ；ＬｉｎＹＡＮＧ；ＱｕａｎＬｉｎｇ；ＺａｎＳＨＩ；（Ｄｅｐａｒｔｍｅｎ...     

PREPARATION OF Cr-POLYSTYRENE COMPLEX BY METALVAPOR SYNTHESIS

ＰＲＥＰＡＲＡＴＩＯＮＯＦＣｒ－ＰＯＬＹＳＴＹＲＥＮＥＣＯＭＰＬＥＸＢＹＭＥＴＡＬＶＡＰＯＲＳＹＮＴＨＥＳＩＳ￥ＳｈｉＨｕａＷＵ；ＣｈａｎｇＹｉｎｇＺＨＵａｎｄＷｅｉＰｉｎｇＨＵＡＮＧ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，ＮａｎｋａｉＵｎｉｖ...     

STRUCTURE AND PROPERTIES OF P(MMA-MAA)/PEO INTERMACROMOLECULAR COMPLEX FORMED THROUGH HYDROGEN BONDING

The superstructure and properties of polymers might be improved and enhanced througl intermolecular complexation. In this paper, the preparation, structure and properties of P(MMA-MAA)/PEO intermolecular complex through hydrogen bonding are studied. By acid hydrolysis of PMMA, a series of P(MMA-MAA) copolymers have been prepared, the MAA content of which depends on the temperature and time of hydrolyzation. In case the MAA content in P(MMA-MAA) is beyond 0.4 mole fraction, the hydrogen bonding between P(MMA-MAA) and PEO is strong enough to form intermolecular complex. The supermolecular structure of the complex is quite different from that of its constituent, which was observed by an X-ray diffraction and transmission electron microscope. The crystallization of PEO is confined owing to complexation. The complex exhibits quite a lot of good properties in thermal stability, gas permeability as well as mechanical strength, and could be used in many fields.     

PREPARATION AND CATALYTIC HTDROGENATION BEHAVIOUR OF POLYMERIC PORPHYRIN－PALLADIUM COMPLEX

ＰＲＥＰＡＲＡＴＩＯＮ　ＡＮＤ　ＣＡＴＡＬＹＴＩＣ　ＨＴＤＲＯＧＥＮＡＴＩＯＮ　ＢＥＨＡＶＩＯＵＲ　ＯＦ　ＰＯＬＹＭＥＲＩＣ　ＰＯＲＰＨＹＲＩＮ－ＰＡＬＬＡＤＩＵＭ　ＣＯＭＰＬＥＸＰＲＥＰＡＲＡＴＩＯＮＡＮＤＣＡＴＡＬＹＴＩＣＨＴＤＲＯＧＥＮＡＴＩＯ...     

CRYSTAL AND MOLECULAR STRUCTURE OF THE COMPLEX OF METHOXYCARBONYLETHYLTIN TRICHLORIDE WITH SALICYLIDENE－M－TOLUIDINE

ＣＲＹＳＴＡＬＡＮＤＭＯＬＥＣＵＬＡＲＳＴＲＵＣＴＵＲＥＯＦＴＨＥＣＯＭＰＬＥＸＯＦＭＥＴＨＯＸＹＣＡＲＢＯＮＹＬＥＴＨＹＬＴＩＮＴＲＩＣＨＬＯＲＩＤＥＷＩＴＨＳＡＬＩＣＹＬＩＤＥＮＥ－Ｍ－ＴＯＬＵＩＤＩＮＥＦａｎｇＸｉｎＦＵ；ＸｉｕＪｕａｎＬＩ；Ｈ...     

THE IMMOBILIZATION OF AMINOACYLASE AND THE RESOLUTION OF D,L-PHENYLALANINE

A polymer with suitable physical characters and matched functional groups was synthesized,and used as a supporter to immobilize aminoacylase. The results showed that this supporterhad high immobilizing capacity and high selectivity for aminoacylase. Immobilized amino-acylase had high specific activity. In this paper, we determine the physical and chemicalcharacters of aminoacylase for resolution of D,L--phenylalanine, including its optimum tem-perature, pH, ion concentration, activated ion, substrate concentration, thermal stability anddenaturation. The immobilized aminoacylase was used to resolve the D,L-phenylalaninecontinuously. Thc resolved products was separated and purified with ion-exchange resins. L-phenylalanine solution was concentrated by vacuum evaporation and its hydrochloride wasformed. Checking of final product with polarimeter showed high yield and purity.     

SYNTHESIS AND STRUCTURE OF A NOVEL INFINITE-LAYER COPPER(Ⅱ)COMPLEX BRIDGED BY OXAMIDE AND PYRIMIDINE

The complex polymer[Cu_2(oxap)(pyr)_2]_n(ClO_4)_(2n),where oxap~(2-)stands for N,N'-bis(2—aminopropyl)oxamide,have been synthesized.It crystallizes in monoclinic system,space group P2_1/C,with a=8.721(2),b=8.679(2),c=16.741(2),β=98.59(0),Z=4.Theleast-square refinement coverged at R=0.054,R_w=0.055 with 1869 unique reflections.Thewhole structure of the complcx consists of layers of two-dimensional network arrayingalong a-axis with perchlorate ions interspersed in the gap between layers.Inside the layer.trans-oxamide-bridged copper(Ⅱ)dimers connected by pyrimidine in an asymmetric fashionspread out along be plane to form an infinite two-dimensional network.     

HYDROGENATION OF PHENOL AND CRESOLS CATALYZED BY CHITOSAN SUPPORTED PALLADIUM COMPLEX AT MILD CONDITIONS

A natural polymer catalyst, sillca-supported chitosan palladium complex (abbr. asSiO_2-CS-Pd) was found to catalyze the hydrogenation of phenol and cresols to correspond-ing cyclohexanones in high yield and 100% selectivity at 70℃ and 1.01325×10~5 Pa mildconditions. N/Pd molar ratio in the complex, temperature and solvents have much infiuenceon the reaction. The reactivity order of reactants was found to be: phenol >m->p->o-cresol. The catalyst is stable during the reaction and could be repeatedly used for severaltimes without much decrease in its catalytic activity.     

PROTEIN IMMOBILIZATION ON CHEMICALLY MODIFIED CELLULOSE MEMBRANE AND AFFINITY SEPARATION OF α－INTERFERON

ＰＲＯＴＥＩＮ　ＩＭＭＯＢＩＬＩＺＡＴＩＯＮ　ＯＮ　ＣＨＥＭＩＣＡＬＬＹ　ＭＯＤＩＦＩＥＤ　ＣＥＬＬＵＬＯＳＥ　ＭＥＭＢＲＡＮＥ　ＡＮＤ　ＡＦＦＩＮＩＴＹ　ＳＥＰＡＲＡＴＩＯＮ　ＯＦ　α－ＩＮＴＥＲＦＥＲＯＮＰＲＯＴＥＩＮＩＭＭＯＢＩＬＩＺＡＴＩＯＮ...     

SYNTHESIS AND CHARACTERISTIC OF POLYSILANES CONTAINING Si-H BOND

Three kinds of polysilanes containing Si-H bond,■■ CH_3SiCH_3■_x■CH_3SiH■_y■_n and■PhSiPh■_π■CH_3SiH■_y■CH_3SiCH_3■, have been synthesized. The structures of these copolymers were investigated by IR, ~1H-NMR and ~(13)C-NMR and their molecular weights were measured.     

ASYMMETRIC EPOXIDATION OF CHROMENE DERIVATIVES WITH HYDROGEN PEROXIDE CATALYZED BY OPTICALLY ACTIVE Mn （Ⅲ） SALEN COMPLEX

ＡＳＹＭＭＥＴＲＩＣＥＰＯＸＩＤＡＴＩＯＮＯＦＣＨＲＯＭＥＮＥＤＥＲＩＶＡＴＩＶＥＳＷＩＴＨＨＹＤＲＯＧＥＮＰＥＲＯＸＩＤＥＣＡＴＡＬＹＺＥＤＢＹＯＰＴＩＣＡＬＬＹＡＣＴＩＶＥＭｎ（Ⅲ）ＳＡＬＥＮＣＯＭＰＬＥＸ￥ＨｏｎｇＢｉｎＳＵＮ；ＷｅｉＹｉＨＵＡ...     

A NEW METHOD FOR PREPARATION OF IRON（Ⅱ） PORPHYRIN COMPLEX－ISOLATION AND CHARACTERIZATION OF AMINE COMPLEX OF FERROUS PORPHYRIN

ＡＮＥＷＭＥＴＨＯＤＦＯＲＰＲＥＰＡＲＡＴＩＯＮＯＦＩＢＯＮ（ＩＩ）ＰＯＲＰＨＹＲＩＮＣＯＭＰＬＥＸ－ＩＳＯＬＡＴＩＯＮＡＮＤＣＨＡＲＡＣＴＥＲＩＺＡＴＩＯＮＯＦＡＭＩＮＥＣＯＭＰＬＥＸＯＦＦＥＲＲＯＵＳＰＯＲＰＨＹＲＩＮ￥ＸｉｎＨｕａＺＨＯＮＧ；Ｙ...     

THE DETERMINATION OF GLUCOSE IN URINE BY USING CYCLIC VOLTAMMETRY

ＴＨＥＤＥＴＥＲＭＩＮＡＴＩＯＮＯＦＧＬＵＣＯＳＥＩＮＵＲＩＮＥＢＹＵＳＩＮＧＣＹＣＬＩＣＶＯＬＴＡＭＭＥＴＲＹ￥ＺｈｅｎｇＹｕＺＨＯＵ；ＣａｎＺｈｕＧＡＯ；ＱｉｎｇＣｕｎＺＨＵ；ＦｕＹｅＧＡＯ；ＦａｎＺｈｅｎＫＯＮＧ（ＣｈｅｍｉｓｔｒｙＤｅｐａｒｔ...     

SYNTHESIS OF POLYTETRAPHENYLPORPHYRIN AND ITS MANGANESE COMPLEX

A new polymeric tetraphenylporphyrin and its manganese complex were synthesized. Their structures were identified by examining the visible absorption, IR, ~1H-NMR spectra.