Preparation of taurine
210984599
Facile preparation of taurine modified magnetic chitosan nanocomposites as biodegradable adsorbents toward methylene blue
ABSTRACT A novel magnetic Fe3O4@chitosan@taurine adsorbent (MCT) was prepared by surface modification of magnetic chitosan nano composites with taurine glutaraldehyde solution. The adsorbents were characterized by FTIR, SEM, TEM, XRD, TGA and VSM techniques, respectively. According to the FTIR spectrum of MCT, the characteristic peaks of the SO3 group on MCT were observed to have a shift after adsorption of the cationic dye, which indicates that there may be electrostatic attraction between the MCT and the cationic dye. Moreover, the saturation magnetization of MCT was found to be 20.797 emu g 1, suggesting that MCT has sufficient magnetic response to meet the need of magnetic separation. The adsorption properties of cationic dyes by MCT were further investigated by using methylene blue (MB) as a representative. The adsorption behaviour of MB by MCT was well described by the pseudo second order kinetic model and the Langmuir isotherm model, respectively. The maximum adsorption capacity of MB calculated from the Langmuir model fitting was 204.1 mg g 1 at pH 5 and 384.6 mg g 1 at pH 9, respectively, and the adsorption equilibrium could be reached within 10 min. Besides, the negative values of DGdeg and DHdeg suggested that the adsorption process was spontaneous and exothermic, and the good reusability indicated that MCT could act as a recyclable adsorbent for dye adsorption. All of these results illustrate that MCT has great potential for practical application in removal of cationic dyes from aqueous solutions. GRAPHICAL ABSTRACT
Environmental technology
Long Huang Dan Li Duntie Zhang Hong Peng Yong-zheng Ren
146092424
A method for the preparation of taurine
Ben Shen Qing Ti Gong Yi Chong Zhi Bei Niu Huang Suan De Fang Fa ,Qi Te Zheng Zai Yu ,Bao Gua Yi Xia Bu Zou (a)Jiang Qian Yi Ji Huang Suan Yu Niu Huang Suan Yan Rong Ye Hun He Zhi Ti Xi pHZhi Da Dao 5.0~9.5Zhong De Mou Yi Zhi (b)Fen Chi Ti Xi Zhong De Ye Xiang He Gu Xiang ;Qi Zhong ,Suo De Gu Xiang Wei Niu Huang Suan Cu Pin ,Suo De Ye Xiang Wei Qian Yi Ji Huang Suan Yan Rong Ye (c)Jiang Bu Zou (b)Suo De Ye Xiang Jia An Shui Fan Ying ,De Dao Han You Niu Huang Suan Yan Rong Ye Suo Shu Zhi Bei Niu Huang Suan De Fang Fa Bi Mian Liao Chuan Tong Gong Yi Zhong Cai Yong Liu Suan Diao Jie pHDai Lai De Wen Ti ,Tong Guo Xun Huan Li Yong Niu Huang Suan Yan Zhong De Yang Chi Zi Ji ,Bu Yin Ru Xin De Yuan Liao Huo Shi Ji ,Zai Jian Shao Wei Xian Hua Xue Pin Yuan Liao Shi Yong De Tong Shi ,Da Da Jian Hua Liao Sheng Chan Gong Yi ,Ti Gao Liao Yuan Liao Li Yong Lu He Chan Pin Shou Lu ,Da Fu Jiang Di Liao Sheng Chan Cheng Ben
30029641
Coenzyme A derivatives of bile acids chemical synthesis, purification, and utilization in enzymic preparation of taurine conjugates.
Synthesis of the coenzyme A derivatives of bile acids by the mixed anyhydride method results in a product that is contaminated by unreacted CoASH and bile acid. These compounds can be purified by Sephadex LH 20 chromatography. In each case, the purified product is free of starting materials and exhibits an equimolar ratio of bile acid, coenzyme A, and thioester bond. Millimolar extinction coefficients were calculated for these compounds as A259 nm, 15.03 0.58; A232 nm, 7.60 0.17; and A232 nm for the thioester bond, 4.12 0.17. These CoA derivatives were hydrolyzed in strongly alkaline solution, but were stable at physiologic temperature and pH. Utilization of these compounds in the enzymic preparation of taurine conjugates of bile acids indicated 94% activity. These purified CoA derivatives may be useful in studying the enzymic conjugation of bile acids.
Journal of lipid research
Paul G Killenberg D F Dukes
103650944
Preparation of taurine from squid
The invention relates to preparation of taurine from squid, and belongs to the technical field of research and development of medicinal products. The preparation comprises the following steps of: adding water of which the amount is 4 to 6 times that of homogenate liquid of the squid into the homogenate liquid of the squid and putting the mixture in a water bath kettle with the temperature of 80 to 90 DEG C to perform extraction; adding water of which the amount is 4 times that of filter residues into the filter residues to perform extraction for 60 to 70 minutes and then performing ultrasonic processing for 1 to 1.5 hours, wherein the temperature is 30 DEG C and the power is 80 W; adjusting the pH value of the filtrate by using acid base and then performing centrifugation to remove protein; adding active carbon to perform adsorption for 6 hours and then filtering; adjusting the pH value of the filtrate to be 4.5 by using hydrochloric acid; allowing the filtrate to pass through a 732 strong acid type cation exchange resin column; according to the comparison of a Rf value of the taurine in a reference substance with that of in a thin layer chromatograph, combining the consistent part of the Rf value in the reference substance and the thin layer chromatograph; adding absolute ethanol of which the amount is 3 times that of the concentrated solution and putting the mixture in a refrigerator with the temperature of 4 DEG C for a night; separating taurine crystal out; and performing recrystallization on the absolute ethanol to obtain the needle like taurine crystal. The products have the functions of enhancing cell anti oxidation, radical damage resistance, antiviral attack and the like and play an important role in vision, brain and height of a human body.
103021022
Preparation of taurine from squid liver
The invention relates to preparation of taurine from a squid liver, and belongs to the technical field of research and development of medicinal products. The preparation comprises the following steps of: putting homogenate liquid of the fresh squid liver in a water bath kettle with the temperature of 55 DEG C for 20 to 24 hours; putting the homogenate liquid in a water bath kettle with the temperature of 80 DEG C to perform extraction for 50 to 60 minutes and then performing ultrasonic processing for 1 to 1.5 hours, wherein the temperature is 30 DEG C and the power is 80 W; adjusting the pH value of the filtrate and then performing centrifugation to remove protein; adding active carbon to perform adsorption for 6 hours and then filtering; adjusting the pH value of the filtrate to be 4.5 by using hydrochloric acid; allowing the filtrate to pass through 732 strong acid type cation exchange resin; according to the comparison of a Rf value of the taurine in a reference substance with that in a thin layer chromatograph, combining the consistent part of the Rf value in the reference substance and the thin layer chromatograph; adding absolute ethanol of which the amount is 3 times that of the concentrated solution, and putting the mixture in a refrigerator with the temperature of 4 DEG C for 12 hours; separating taurine crystal out; and performing recrystallization on the absolute ethanol to obtain the high purity taurine crystal. The products have the functions of enhancing cell anti oxidation, radical damage resistance, antiviral attack and the like and play an important role in vision, brain and height of a human body.
101342158
The Process of Preparation of Taurine from Ethylenimine
The synthesis of taurine from ethylenimine is introduced.The optimization reaction conditions are:the stoichiometric ratio of monoethanolamine sulfate and sodium hydroxide 1:1.2,the reaction temperature 110 ~120 ,the stoichiometric ratio of monoethanolamine sulfate and ammonia hydrogen sulfite 1:1.15.While for the ring opening reaction between ethylenimine and ammonia hydrosulfite,the reaction conditions are:the temperature below 40 ,reaction time 1~1.5 h,pH 8 or so.
Wang Jian-xin Sun Jian-feng
3948301
Taurine as a green bio organic catalyst for the preparation of bio active barbituric and thiobarbituric acid derivatives in water media.
Taurine, a b amino acid that is abundantly available in the tissues of human and animals, is efficiently used as a green bio organic catalyst in the preparation of some of the biologically active barbituric and thiobarbituric acid derivatives. In the presence of taurine, 5 Arylidene (thio) barbituric acid derivatives were prepared via Knovenagel reaction between aldehydes and (thio)barbituric acid. Using this reagent also pyrano[2,3 d]pyrimidinone(thione) derivatives were synthesized through a three component reaction between aldehydes, (thio)barbituric and malononitrile. Both reactions are performed in water with good to excellent yields during acceptable reaction times. No organic solvent was used during reaction or separation steps and no extra purification was exerted. Meanwhile, reusability of taurine was easy and noticeably high.
Bioorganic chemistry
Nader Daneshvar Farhad Shirini Mohaddeseh Safarpoor Nikoo Langarudi Reyhaneh Karimi-Chayjani
370119
The Preparation of Taurine in Considerable Quantity.
The Biochemical journal
William Ogilvy Kermack Robert Henry Slater
102940281
Preparation of taurine and derivatives thereof
The invention provides a novel preparation method for taurine, substituted taurine and N acylated derivates. The method comprises taking aziridine and substituted aziridine as raw material, obtaining N acylated taurine derivates by opening loop and oxygenizing, hydrolyzing N acylated taurine derivates to obtain taurine or substituted taurine. The raw material of the preparation method is simple and easy to get and prepare, especially convenient to separate and purify, and can be used for the preparation of optical activity substituted taurine and N acyl group substituted taurine. The obtained compounds can be used as nutrient substance, medicament, enzyme inhibitors, antibacterial agents, surface active agents, plant growth regulators and raw materials for preparing sulfonopeptides.
92272375
Study on Preparation Technology of Taurine in Rice Peptide Feed
material, the multi strain solid state fermentation method was used to study the preparation technology of taurine, and the analysis of variance was employed to determine the optimal process of taurine preparation as follows: fermentation time (72 h) amount of cysteinyl acid (2.5 g) amount of methionine (2.5 g) ratio of Bacillus subtilis YS 45 to yeast S 78 to Aspergillus niger PL 39 (1:2:1) Under the optimal process, the taurine content reached 117.8 mg/g.
Peng Liang Li Bing Wang Hui Jianzhou Tang