Hygienic Quality of Ready-to-Eat Food and Hsian-tsao (Mesona procumbens Hemsl.) Products and its Antioxidant Activities

• Main Authors: CHEN,PEI-JU, 陳沛汝
• Other Authors: LIN,CHUNG-SAINT
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/22587242740697202873

碩士 === 元培醫事科技大學 === 食品科學系碩士班 === 104 === The present study investigated the food hygiene and safety of the ready-to-eat foods (RTE) in Taiwan. Samples including 49 salads (chicken and vegetable salads), 46 sandwiches, 6 rice products, and 3 breads were collecting from convenience stores, restaurants, ready-to-eat stores, coffee shops and supermarkets. Coliforms, E. coli, Salmonella, and S. aureus were examined in every samples. Besides, Campylobacter was examined additionally in poultry samples. The results demonstrated that 33 samples (31.7%) failed compliance check due to coliforms exceeded sanitation standard limit. Among them, 2 samples were found S. aureus – positive. For other pathogenic microorganism such as E. coli, Salmonella and Campylobacter were not detected. This program aimed to call attention to food industries that they shall enforce food hygiene and safety concepts during manufacturing, transportation, and selling processes. Food industries shall obey Good Hygienic Practices (GHP), and take responsibility for self-management, to reduce the chance of foodborne outbreak. Recently, food hygiene has always been a major concern worldwide. Mesona procumbens Hemsl., also named Hsian-tsao, has been consumed as a popular gum-like drink in China for many years. The present study investigated the food hygiene and safety of the Hsian-tsao in Taiwan. Samples including 6 package of Hsian-tsao tea, 49 unpackage of Hsian-tsao tea and 15 jelly of Hsian-tsao products were collecting from markets, night markets and supermarkets. Aerobic Plate Count, Coliforms, E. coli, Salmonella, preservatives and sweeteners were examined in every samples. Besides, maleic acid was examined additionally in jelly hsian-tsao samples. None of the samples contained Escherichia coli, Salmonella, sweeteners, preservatives and maleic acid. Therefore, this research was undertaken by testing 70 hsian-tsao sold in retail markets in Taiwan so that a better understanding of the safety quality of the products could be accomplished to be better protect the consumers. Hsian-tsao (Mesona procumbens Hemsl.) is the particular green economic crop, but there were few studies to investigate the content of phenolic compounds and antioxidant activity of rape. Hot water, room temperature water and ethanol were used as solvents to obtain crude extracts from whole plants, stems and leaves of Mesona procumbens Hemsl., then the content of total polyphenols and flavonoids,the scavenging activity of 2,2-dipheny1-1-picrylhydrazy1 (DPPH), total reducing power and Fe2+ chelating activity were determined. The results suggest that Hsian – tsao leef are rich in polyphenols and DPPH radicals, and are potential candidates for development as nature antioxidants.