GRNTI 34.39 Физиология человека и животных
GRNTI 62.13 Биотехнологические процессы и аппараты
GRNTI 69.01 Общие вопросы рыбного хозяйства
GRNTI 69.25 Аквакультура. Рыбоводство
GRNTI 69.31 Промышленное рыболовство
GRNTI 69.51 Технология переработки сырья водного происхождения
GRNTI 87.19 Загрязнение и охрана вод суши, морей и океанов
The paper studies the conditions for obtaining chitosan from the shells (wastes from cutting the shell) of green shrimp Penaeus semisulcatus , caught in Egypt. Demineralization of raw materials was carried out using 1 M HCl at 45°C for 2 hours, and deproteinization was made with the use of 1 M HCl at 75°C for 4 hours. As a technology of obtaining chitosan there was used deacetylation of chitin (50 g dried shrimp shells), produced in accordance with the previously developed technology using NaOH treatment solution of different concentrations (2.5, 5, 7.5, 10 and 12.5 mol) and by heating (30, 45, 60, 75 and 90°C), which dramatically reduced the time of deacetylation. The dependence of the properties of the chitosan on the concentration of NaOH, temperature and duration of the experiment was examined. The optimal mode of chitosan obtaining - treatment with a solution NaOH with concentration of 10 M at 90°C for 2 hours was set. Chitosan obtained in these conditions, had a degree of deacetylation of 83.53%. The water binding capacity of the product was 521.65%, fat binding capacity was 405.65%, the solubility - 55.65%. The resulting chitosan is able to accumulate and transfer the valuable biologically active substances that have a high biodegradability, perform anti-microbial and anti-fungal activity, allowing to use it in food production.
Egypt, green shrimp, chitin, chitosan, degree of deacetylation, concentration
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