کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
685353 | 889038 | 2009 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Effect of temperature on chitin and astaxanthin recoveries from shrimp waste using lactic acid bacteria Effect of temperature on chitin and astaxanthin recoveries from shrimp waste using lactic acid bacteria](/preview/png/685353.png)
The chitin and astaxanthin recoveries by lactic acid fermentation of shrimp wastes (Litopenaeus sp) were conducted in bed-column reactors at 15, 20, 25, 30, 35, 40 and 45 °C. The response surface methodology showed that the fermentations carried out in the 27–36 °C temperature range with lactic acid above 0.319 mmol/g resulted in the highest demineralization. The maximal deproteinizations were attained from 30 to 40 °C. The extraction of free-astaxanthin did not present significant differences between 20 and 35 °C and the proportion of cis-stereoisomer forms increased with temperature. The growth rates of Lactobacillus plantarum were estimated in the 15–45 °C range and analyzed by Arrhenius and square root models. The cardinal values were 3.94 and 51.7 °C for minimum and maximum temperatures, respectively, with activation energy of 43.38 Jmol−1.
Journal: Bioresource Technology - Volume 100, Issue 11, June 2009, Pages 2849–2854