Degradation of Green Tea Catechins in Tea Drinks Assignment

Degradation of Green Tea Catechins in Tea Drinks - Assignment ExampleThis consider is significant because it studies the effect of processing conditions on GTC content. It is important to conserve the GTC content of teatime during processing to adjudge its beneficial effects. Results of the battleground reveal that the GTC content of processed tea is significantly low compared to traditionally prompt tea. While a cup of traditionally brewed tea contains 400-500 mg of GTC, processed tea contains only 3-60 mg GTC. GTC is stable at room temperature. About 10-15%, GTC is lost when tea is heated up to 98 ?C for 15-30 minutes, with additional 5% loss on prolonged heating. Autoclaving at 120 ?C for 20 minutes, which is notwithstanding another step during processing, leads to a loss of 23% GTC. This loss is directly proportional to the pH of the medium. Furthermore, rough 80% of the GTC content is degraded in a buffer medium of pH 6. The stability and shelf life of GTC is overly foun d to be dependent on pH content in the absence seizure of other ingredients. Half of the GTC content is lost within 3 months at a pH to a lower place 4.5. Sucrose has no effect on the stability of GTC while citric acid leads to a windy degradation. Ascorbic acid has a protective effect in the first month after which it accelerates the degradation. In addition, the results also reveal that at high temperatures, EGCG undergoes epimerization to form GCG. This explains the contrasting GCG content between traditionally prepared tea and processed tea, wherein, the GCG content is higher by 45% in processed tea. Overall, it can be cogitate that GTC degrades easily at high temperature and pH, and that the stability of GTC depends on the presence of other ingredients. Further studies that focus on the effect of each ingredient present in processed tea on the stability and hurrying of degradation of GTC are required. II. Coffee and Green Tea as a Large Source of Antioxidant Polyphenols in the Japanese Population (Fukushima et al 1253-1259) The objective of this study was to evaluate the total consumption of polyphenols by Japanese people. Polyphenols are well known for their antioxidant activity and beverages are a major source of polyphenols in Japan. The findings of this study suggest that an individual per day consumes an average of 853 mg of polyphenols. The largest source of polyphenols in the Japanese population is coffee, which provides two hundred ml of polyphenols in every 100 mL. The average polyphenol consumption through coffee is found to be 426 mg/day. The second largest source of polyphenol is Green tea, which contributes up to 292 mg polyphenols/day. Thus, coffee and green teas constitute up to 70% of the total beverage consumption and are the largest sources of polyphenols. Among increases and vegetables, satsuma oranges and onions are the most consumed and provided 9 and 4 mg of polyphenols, respectively, per day. Cacao mass (chocolate) and black p epper contribute about 0.8 g and 0.2 g polyphenols per day. amount of the antioxidant activities correlates well with the total polyphenol content of all the tested consumables, suggesting that the in vitro antioxidant activities are proportional to the total polyphenol quantities. hereafter studies will have to examine whether in vivo antioxidant properties of these polyphenols correlate well with those observed in vitro. III. Content of potentially Anticarcinogenic Flavonoids of Tea Infusions, Wines, and Fruit Juices (Hertog, Hollman, and Putte 1242-1246) This study attempted to evaluate the concentrations of various anti-carcinogenic flavonoids in beverages such as tea, wines and fruit juices. The study found