00539naa#a2200181#i#450# EN\\bibl\112904 20260118201641.7 2311-1402 20150325b2015####ek#y0engy0150####ca RUS RU Technology of producing chitosan from shell-containing materials Journal article Nizhnevartovsk Nizhnevartovsk State University 2015 8 с. Journal article local Хитин. 612.396.172 RUS Soldatova S Yu vestnik.nvsu.ru