Disclosed is a method of preparing hypophosphorous acid comprising contacting an insoluble anode with an aqueous solution of hypophosphite anions and applying a direct current through the insoluble anode to a cathode ...Disclosed is a method of preparing hypophosphorous acid comprising contacting an insoluble anode with an aqueous solution of hypophosphite anions and applying a direct current through the insoluble anode to a cathode in electrical contact with the aqueous solution to generate H+ ions in the aqueous solution thereby forming a hypophosphorous acid solution. The process is simple, low cost and high efficient, which can be tied into an existing process for producing sodium hypophosphite wherein the product of sodium hypophosphite process is used as a starting material in the hypophosphorous acid process.展开更多
A high Mw of PLLA was synthesized, it intended to be used in the manufacture ofbioabsorbable screw applied in bone fracture internal fixation. The optical reactionconditions have been discussed.
PLA is presently considered as the most attractive compound for temporarytherapeutic application in the biomedical field. In this paper we give an overview of thepresent knowledge on the degradation behavior,processin...PLA is presently considered as the most attractive compound for temporarytherapeutic application in the biomedical field. In this paper we give an overview of thepresent knowledge on the degradation behavior,processing technology of PLA and itsapplication in the fixation of bone fracture.展开更多
Polymer supported alkyl dimethyl benzyl ammonium chloride resin disinfectant used for the disinfection of drinking water has been synthesized, and itsantibacterial activities have been determined, compared with the co...Polymer supported alkyl dimethyl benzyl ammonium chloride resin disinfectant used for the disinfection of drinking water has been synthesized, and itsantibacterial activities have been determined, compared with the commerciallyused triiodine disinfectant resin. The basin disinfectant was generated successfully when use the combination of surface active agents and ultrosonic.展开更多
In view of the importance of dispersion agent,the amount of the crosslinking monomer and the diluent in suspension polymerization for the production of particle size narrowly distributed low-density stryene divinylben...In view of the importance of dispersion agent,the amount of the crosslinking monomer and the diluent in suspension polymerization for the production of particle size narrowly distributed low-density stryene divinylbenzene copolymer microbeads(LDPS),their actions are preliminarily investigated in this paper.Experimental results indicate that when both the gelatine and polyvinyl alcohol(PVA)are used dispersion agents,the better effect is achieved,DVB is helpful to the formation of the lower density fine particles,the proportionof the DVB/St should be between 1:1-1.5:1.Compared with toluene,gasoline is the more effective diluent for the above target.展开更多
Adsorption resin AAS was used for the separation and purification of milupeinan (M-13) from its mother liquor. The good adsorption property of AAS adsorption resin was found for milupeinan (M-13) compared with the Dia...Adsorption resin AAS was used for the separation and purification of milupeinan (M-13) from its mother liquor. The good adsorption property of AAS adsorption resin was found for milupeinan (M-13) compared with the Diaion CHP 20p. When acetone and water (2:1 in volume) were used as desorption reagents, it was found that 3 times of bed volume of the desorption reagents would make the AAS resin which was saturately adsorpted M-13 desorption completely. Also a macroporous anion exchange resin (Poly-4-vinylpyridine type) D-280 was used for the decolourization from M-13 solution. Good results was given when the sv=1~2.展开更多
In this paper,two kinds of PS-PTCs were synthesized using different methods byintroducing cinchonine and quinine to the polymer support. Their catalytic properties forthe alkylation of N-diphenylmethylene glycine t-bu...In this paper,two kinds of PS-PTCs were synthesized using different methods byintroducing cinchonine and quinine to the polymer support. Their catalytic properties forthe alkylation of N-diphenylmethylene glycine t-butyl ester were also compared展开更多
文摘Disclosed is a method of preparing hypophosphorous acid comprising contacting an insoluble anode with an aqueous solution of hypophosphite anions and applying a direct current through the insoluble anode to a cathode in electrical contact with the aqueous solution to generate H+ ions in the aqueous solution thereby forming a hypophosphorous acid solution. The process is simple, low cost and high efficient, which can be tied into an existing process for producing sodium hypophosphite wherein the product of sodium hypophosphite process is used as a starting material in the hypophosphorous acid process.
文摘A high Mw of PLLA was synthesized, it intended to be used in the manufacture ofbioabsorbable screw applied in bone fracture internal fixation. The optical reactionconditions have been discussed.
文摘PLA is presently considered as the most attractive compound for temporarytherapeutic application in the biomedical field. In this paper we give an overview of thepresent knowledge on the degradation behavior,processing technology of PLA and itsapplication in the fixation of bone fracture.
文摘Polymer supported alkyl dimethyl benzyl ammonium chloride resin disinfectant used for the disinfection of drinking water has been synthesized, and itsantibacterial activities have been determined, compared with the commerciallyused triiodine disinfectant resin. The basin disinfectant was generated successfully when use the combination of surface active agents and ultrosonic.
文摘In view of the importance of dispersion agent,the amount of the crosslinking monomer and the diluent in suspension polymerization for the production of particle size narrowly distributed low-density stryene divinylbenzene copolymer microbeads(LDPS),their actions are preliminarily investigated in this paper.Experimental results indicate that when both the gelatine and polyvinyl alcohol(PVA)are used dispersion agents,the better effect is achieved,DVB is helpful to the formation of the lower density fine particles,the proportionof the DVB/St should be between 1:1-1.5:1.Compared with toluene,gasoline is the more effective diluent for the above target.
文摘Adsorption resin AAS was used for the separation and purification of milupeinan (M-13) from its mother liquor. The good adsorption property of AAS adsorption resin was found for milupeinan (M-13) compared with the Diaion CHP 20p. When acetone and water (2:1 in volume) were used as desorption reagents, it was found that 3 times of bed volume of the desorption reagents would make the AAS resin which was saturately adsorpted M-13 desorption completely. Also a macroporous anion exchange resin (Poly-4-vinylpyridine type) D-280 was used for the decolourization from M-13 solution. Good results was given when the sv=1~2.
文摘In this paper,two kinds of PS-PTCs were synthesized using different methods byintroducing cinchonine and quinine to the polymer support. Their catalytic properties forthe alkylation of N-diphenylmethylene glycine t-butyl ester were also compared
