{'fraction_non_alphanumeric': 0.02976190476190476, 'fraction_numerical': 0.016666666666666666, 'mean_word_length': 5.094202898550725, 'pattern_counts': {'":': 0, '<': 1, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Supercritical Carbon Dioxide Extraction of the Fatty Acids from Pacific white Shrimp Waste (Litopenaeus vannamei)

The content of total lipids in Pacific white shrimp head was higher than those find in other shrimps. A process to extract lipids from Pacific white shrimp waste (head) was developed. Supercritical fluid extraction was used and the effects of temperature, pressure, CO2 flow rate and extraction time on extraction yield and composition of the fatty acids were investigated. The extraction yield had little dependence on pressure, temperature and CO2 flow rate. However, the pressure and temperature conditions affected the composition of the fatty acids. Addition of entrainer can increase the extraction yield significantly (P<0.01), the maximum of the extraction yield was 80.9% with 8% ethanol at 30 Mpa, 45°C and 1 L/min.