Экстракция и реэкстракция гистидина и рибофлавина сополимерами n-винилкапролактама с 1-винил- и 1-метакрилоил-3,5-диметилпиразолом. <...> For citation: Lavlinskaya M.S., Shatalov G.V., Mokshina N.Ya., Pakhomova O.A., Kuznetsov V.A. <...> Extraction and reextraction of histidine and riboflavin by n-vinylcaprolactame copolymers with 1-vinyl- and 1-methacryloyl-3,5-dimethylpyrozole. <...> Коммунаров, 28, Липецкая обл., Российская Федерация, 399770 E-mail: pakhomchic@mail.ru ЭКСТРАКЦИЯ И РЕЭКСТРАКЦИЯ ГИСТИДИНА И РИБОФЛАВИНА СОПОЛИМЕРАМИ NВИНИЛКАПРОЛАКТАМА С 1-ВИНИЛ- И 1-МЕТАКРИЛОИЛ-3,5-ДИМЕТИЛПИРАЗОЛОМ На основе синтезированных термочувствительных водорастворимых сополимеров предложены двухфазные водно-солевые системы для извлечения гистидина и рибофлавина из водных сред. <...> Определены константы сополимеризации, установлена возможность проведения реэкстракции α-аминокислоты и витамина. <...> Mokshina Department of Chemistry and Physic, Air Force Academy named after Professor N. <...> N 7 EXTRACTION AND REEXTRACTION OF HISTIDINE AND RIBOFLAVIN BY N-VINYLCAPROLACTAME COPOLYMERS WITH 1-VINYL- AND 1-METHACRYLOYL-3,5DIMETHYLPYROZOLE Copolymers of N-vinylcaprolactam (VC) with 1-vinyl-3,5-dimethylpyrazole (VDMP) and 1-methacryloyl-3,5-dimethylpyrazole (MDMP) were synthesized by free radical copolymerization in dioxane with azodiisobutironitrole as initiator. <...> Both water-soluble and water-insoluble copolymers were obtained. <...> The copolymers compositions were determined by FTIR and UV-spectroscopy. <...> These values show that VC (М1) exhibits somewhat higher activity compared to М2 and that the tendency toward alternation of comonomer units is more pronounced in VC–MDMP copolymers (r1r2 = 0.17) compared to VC–VDMP copolymers (r1r2 = 0.27). <...> It was found that VC–VDMP copolymers are water-soluble at VC content higher than 75 mol %, and VC–MDMP copolymers at VC content higher than 88 mol %. <...> Two-phases water-salts systems based on synthesized water-soludle thermoresponsive copolymers are proposed for histidine and riboflavin (re)extraction in aqueous media. <...> Reextraction carried out by thermoprecipitation of VC (co)polymers. <...> It was shown that reextraction is <...>