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CATALYTIC BEHAVIOR OF A SILICA-SUPPORTED POLYTITAZANE-PLATINUM COMPLEX FOR THE HYDROGENATION OF PHENOL

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Chinese Journal of Polymer Science 1996年第1期14卷 26-33页

作者：陈春伟黄美玉江英彦 Institute of Chemistry Academia Sinica Beijing 100080

A new kind of inorganic polymer, viz, silica-supported polytitazane (Ti-N), and its platinum complex (Ti-N-Pt) were prepared. Cyclohexanone can be obtained in a maximum yield of about 62.2% in the hydrogenation of phenol over Ti-N-Pt at room temperature under atmospheric pressure. The effects of mole ratio of N/Pt in the complex, concentration of the catalyst and reaction temperature on the catalytic activity and selectivity have been studied. The complex can be reused several times without loss in its catalytic activity.

关键词： hydrogenation phenol polytitazane complex cyclohexanone

Denote CSP with Temporal Formulas

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Journal of Computer Science & Technology 1990年第1期5卷 17-23页

作者：周巢尘柳欣欣 Institute of Software Academia Sinica

This is a sequel of [1] to give a temporal semantics to a full version of CSP, including hiding operator and nested parallelism. The semantic definition is of denotational style, and employs set of temporal formulas as denotations. The continuity is proved, when the hiding operator is restricted to channels only with finite possible messages.

关键词： CSP In

SOMATIC HYBRID PLANTS FROM INTERGENERIC FUSION BETWEEN TOBACCO T

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Science China Chemistry 1982年第6期25卷 611-619页

作者：李向辉李文彬黄美娟 academia Sinica academia Sinica Beijing Institute of Genetics

Tobacco tumor B6S3 characterized by phytohormones-independence and incapacity to re-generate plant and containing genetic marker-LpDH has been fused with Petunia hybridaW43 possessing the properties in contrast with the tobacco tumor. Using these characteris-tics, we have established a selective system of somatic hybrid in protoplast fusion, andscreened 2% of the continuously growing green calli from fusion products. Twenty-onehybrids from thirty-four regenerated plants are morphologically inclined to Petunia, but thepresence of lysopine dehydrogenase activity in these plants shows that they are of hybridnature.

关键词： SOMATIC HYBRID PLANTS FROM INTERGENERIC FUSION BETWEEN TOBACCO T

POLYCAPROLACTONE-POLY (ETHYLENE GLYCOL) BLOCK COPOLYMER Ⅲ DRUG RELEASE BEHAVIOR

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Chinese Journal of Polymer Science 1995年第2期13卷 154-161页

作者：贝建中王智峰王身国 Institute of Chemistry Academia Sinica Beijing 100080

The drug release behavior of degradable polymer--polycaprolactone-poly (ethyleneglycol)block copolymer(PCE) in vitro was investigated by using 5-Fluoro-uracil (5-Fu) asa model drug under a condition of pH 7. 4 at 37C. It is found that the release rate of 5-Fufrom PCE increased with increasing polyether content of the copolymer. The results showthat the increasing polyether content of the copolymer caused increasing hydrophilicity anddecreasing crystallinity of the PCE copolymer. Thus, the drug release behavior and thedegradable property of the PCE can be controlled by adjusting the composition of thecopolymer.

关键词： Polycaprolactone Poly (ethylene glycol) Block copolymer Crystallinity Degradability 5-Fluoro-uracil Drug release property

Channeling Alignment for Epitaxial Light-Mass Film on Heavy-Mass Substrate

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Chinese Physics Letters 1994年第5期11卷 293-296页

作者： YIN Shiduan XIAO Guangming ZHU Peiran Institute of Semiconductors Academia SinicaBeijing 100083 Institute of Physics Academia SinicaBeijing 100080

A simple procedure for obtaining a background-free backscattering spectrum of a light-mass film on a heavy-mass substrate by a normal incidence/grazing exit geometry has been *** this method such films can be aligned rapidly and accurately,and the impurity or defect information on the films can be obtained without need for *** is given from MeV^(3)Li^(+)analysis of a deposited film of Si on a single crystal substrate of yttria-stabilized,cubic zirconia.

关键词： film cubic stabilized

AROMATIC AND HETEROCYCLIC NITRILES AND THEIR POLYMERS XIX:THE POLYMERIZATION OF SUBSTITUTED BENZONITRILES CATALYZED BY COBALTIC ACETYLACETONATE

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Chinese Journal of Polymer Science 1996年第3期14卷 255-260页

作者：秦伟黄志镗 Institute of Chemistry Academia Sinica Beijing 100080

The polymerization kinetics of 4, 4'-biphenyldicarbonitrile and other substituted ben-zonitriles catalyzed by cobaltic acetylacetonate was studied. The structure of polymer ofdifferent substituted benzonitrile was also determined. It is found that the rate of polymeri-zation and the structure of polymer is greatly affected by the substituent of benzonitriles.

关键词： Substituted benzointrile Polymerization Cobaltic acetylacetonate

HYDROFORMYLATION OF MMA CATALYZED BY SILICA-SUPPORTED POLY-γ-AMINO PROPYLSILOXANE-Rh-Co BIMETALLIC COMPLEX

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Chinese Journal of Polymer Science 1995年第4期13卷 331-337页

作者：唐黎明黄美玉江英彦 Institute of Chemistry Academia Sinica Beijing 100080

A silica-supported poly-γ- aminopropylsiloxane-rhodium-cobalt bimetallic complex(abbreviated as SiO_2-NH_2-Rh-Co)has been prepared and used as catalyst for hydroformylationof methyl methacrylate. The results showed that the catalyst could catalyze the reaction in95.6% conversion with 92.8% selectivity for the normal aldehyde, methyl β-formylisobu-tyrate. Such catalyst also showed high stability during the reaction and could be used repeat-edly.

关键词： Silica-supported poly-γ-aminopropylsiloxane Rhodium-cobalt bimetallic complex Hydroformylation Methyl methacrylate

ORIENTATION OF MOLECULAR GROUPS IN CROSS SECTION OF POLYAMIDE-6 FIBER BY INFRARED ATTENUATED TOTAL REFLECTION DICHROISM STUDIES

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高分子科学(英文版) 1987年第2期5卷 149-155页

作者：沈德言张盛庆 Institute of Chemistry academia Sinica Beijing Institute of Chemistry academia Sinica Beijing

The polymer fiber usually possess typical uniaxial orientation. The molecular chains are symmetrically distributed around fiber axis. In this work, the orientation of molecular groups in the cross section of polyamide-6 fiber has been measured by using IR ATR method. The results indicated that the polyamide-6 fiber mainly contains α-crystalline form. The direction of hydrogen bonds of amide groups is predominately parallel with the surface in the cross section of the fiber.

关键词： Fiber Infrared Dichroism Orientation Polyamide-6

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

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Chinese Journal of Polymer Science 1996年第1期14卷 57-62页

作者：唐黎明黄美玉江英彦 Institute of Chemistry Academia Sinica Beijing 100080

A natural polymer catalyst, silica-supported chitosan palladium complex (abbr. as SiO2-CS-Pd) was found to catalyze the hydrogenation of phenol and cresols to corresponding cyclohexanones in high yield and 100% selectivity at 70 degrees C and 1.01325 x 10(5) Pa mild conditions. N/Pd molar ratio in the complex, temperature and solvents have much influence on the reaction. The reactivity order of reactants was found to be: phenol >m->p->o- The catalyst is stable during the reaction and could be repeatedly used for several times without much decrease in its catalytic activity.

关键词： silica-supported chitosan palladium complex catalyzing hydrogenation phenol and cresols cyclohexanones