Nobody downloaded yet

Degradation of Green Tea Catechins in Tea Drinks - Assignment Example

Comments (0) Cite this document
Summary
The aim of this research was to investigate the degradation of Green tea catechinssuch as epicatechin,epigallocatechin,epicatechin gallate and epigallocatechin gallate under various conditions …
Download full paperFile format: .doc, available for editing
GRAB THE BEST PAPER98.7% of users find it useful
Degradation of Green Tea Catechins in Tea Drinks
Read TextPreview

Extract of sample
"Degradation of Green Tea Catechins in Tea Drinks"

Download file to see previous pages This study is significant because it studies the effect of processing conditions on GTC content. It is important to conserve the GTC content of tea during processing to retain its beneficial effects. Results of the study reveal that the GTC content of processed tea is significantly low compared to traditionally prepared 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 yet another step during processing, leads to a loss of 23% GTC. This loss is directly proportional to the pH of the medium. Furthermore, about 80% of the GTC content is degraded in a buffer medium of pH 6. The stability and shelf life of GTC is also found to be dependent on pH content in the absence of other ingredients. Half of the GTC content is lost within 3 months at a pH below 4.5. Sucrose has no effect on the stability of GTC while citric acid leads to a faster 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 concluded 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 speed 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 200 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 fruits 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 pepper contribute about 0.8 g and 0.2 g polyphenols per day. Measurement 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. Future 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 ...Download file to see next pagesRead More
Cite this document
  • APA
  • MLA
  • CHICAGO
(“Degradation of Green Tea Catechins in Tea Drinks Assignment”, n.d.)
Retrieved de https://studentshare.org/chemistry/1391618-abstract
(Degradation of Green Tea Catechins in Tea Drinks Assignment)
https://studentshare.org/chemistry/1391618-abstract.
“Degradation of Green Tea Catechins in Tea Drinks Assignment”, n.d. https://studentshare.org/chemistry/1391618-abstract.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document
CHECK THESE SAMPLES - THEY ALSO FIT YOUR TOPIC
Green buildings
...?Schindler, S. tried to explain and assess the privately promulgated Leadership in Energy and Environmental Design (LEED) standards. He arguesthat interpretation of LEED standards causes a couple of problems – both theoretically and practically. It is argued that though cities are taking actions and considering environmental problem seriously, but the problem is that once they have adopted a LEED-based private green building ordinance, it is believed that all possible concerns have been addressed, which is not true rather cities need to modify those ordinances. Further small cities which lack technical expertise have trouble in developing their own green building ordinances. Therefore, because of unavailability of...
3 Pages(750 words)Assignment
Business plane of bubble tea in Beijing China
...? Business Plan: Bubble Tea in Beijing China Insert Insert Grade Insert Insert Organization and Management The proposedstore will be headed by a board of directors. Whereas one of the members will be the C.E.O the rest will also double up as managers for the various departments for the tea shop. The rest of the employees who will be basically cooks, waiters and a cashier will fall under personnel department but will also work closely with other management teams. The general outline of leadership is shown in the organizational chart below: Organizational chart Allocation of Work and Responsibilities Name Position Responsibility Contact Information A C.E.O -Coordination of all functional sections of the store...
3 Pages(750 words)Assignment
Report on The Green Tea whitening Series Launching Program
...?Report on The Green Tea whitening Series Launching Program By: ID Email address Location Submission Date Executive Summary This is a report of the research results of the Ginvera Beauty Company in respect to the plans for launching The Green Tea whitening Series. It gives a brief introduction of the company and the new product. It outlines the methods the marketing assistant used to collect data. In the scanning process, it evaluates the three major competitors of Ginvera. It also gives the result of SWOT analysis. The planning stage also outlines the best marketing strategies for the launching program. It gives detailed findings by describing the best planning process for the...
8 Pages(2000 words)Assignment
Bubble Tea new product offered by Seattle's Best
...Public Relations Public relations is a core tactic in marketing and should be placed beforehand. It has some well proven power in establishing brand names in a very cost effective manner. This makes it an outstanding tool in marketing this product to the public. Public relations will include a variety of activities such as press relations, editorial coverage, newsletters, press familiarization trips, philanthropy, planning of special events, and community relations. With the proven credibility of the media, unlike other traditional sources, more emphasis will be given to the information and how it will be disbanded. Some of the forms that will be put in place are through the print media and press releases. Some of the team members... Relations Public ...
1 Pages(250 words)Assignment
Green acres seed company
...Running head: green acres seed company 22nd March Green acres seed Company Green acres seed Company is a firm that provides farmers with seeds for planting where the company starts from seed green house and plant trays, peat pots, expandable soil pellets, seedling heating mats among others. The company has a wide selections of annuals, perennial, climbers, sunflower, organic veggies and herbs among others. Whether one is starting a new lawn from seed or an existing lawn that one needs to plant year after year, the company has seeds for everyone. Being advanced in technology, the company provides awareness to the farmers so that their seeds can be known by many. This is called the...
2 Pages(500 words)Assignment
ACME Tea
...over the past few years (73% in 2009 to 70% in 2011) (Mintel, 2012). More exotic varieties such as Green Bags, Fruit and Herbal Bags, Speciality Bags and Decaffeinated Bags, are now preferred by the Brits. Sale of green bags has grown a sensational 83% between 2009 and 2011. As many as 12% of the Brits, drink green tea on a weekly basis. A SWOT analysis has been conducted (Appendix A). 1.3 Industry Analysis The tea industry is experiencing growth as consumers seek health drinks and consider tea to be a health drink. Competition with other beverages and drinks are prevalent but...
16 Pages(4000 words)Assignment
Green building
..., construction phase, operation and its maintenance (Wilson et al., 2008). Green building in Canada There are three key driving forces in Canada that makes this new technology in building and construction. Firstly, the increase needs economically to use energy, water and other building materials so as to reduce the overall cost of construction. Secondly, the need to protect the environment from adverse pollution from building materials has enabled the expert recommend green building technology (Roos & Gorgolewski 2011). With increased need to protect the environment from the adverse effects, there have been efforts to reduce waste and protect the environment...
1 Pages(250 words)Assignment
Bantam Soft Drinks
...Task 2 In the era of globalization, it is touted that organizations have to implement methodical strategy to manage employee turnover. In recent years, the reduction of employee turnover has been of great interest for employers and researchers. The rapid expansion of global economy has increased the importance of employee retention to remain competitive and keep pace with the technological advancement. The historical report of Bantam Soft Drinks states that staff turnover of the organization has been low. The staff turnover is pivotal for the development of firm. Furthermore, this can lead to disruption in production, loss of job skills and dramatic incur on cost of hiring new staffs. The four factors which states why employees...
20 Pages(5000 words)Assignment
Green communication
...GOING GREEN affiliation HOW TO GO GREEN Green data storage and green data centers The can reduce its carbon footprint while still having the maximum output from its output, technology resources and physical space. The IT department generates lots of carbon emissions, thanks to the electricity that they use run their machines. The university can thus employ several methods of green data storage that are way friendly to the environment. One method of green data storage that the university can employ is virtualization both at the desktop and the server. Through the use of software, one server will mimic the work of several others, thus saving on the...
2 Pages(500 words)Assignment
Fair trade company that specialises in coffee and tea
...A Fair Trade Company That Specializes In Coffee and Tea The fourth largest coffee producing country in the entire globe is Indonesia. The start of coffee production in the country dates back to the colonial times. The economic activity has greatly contributed to the growth and development of the country. The country’s location makes it suitable for the production of coffee. The country flourishes in an ideal geography of coffee plantations. The geographical coordinate system contributes to the ideal climate for the growth and production. The latitude and longitude contribute to the prevalent environmental degradation and the destruction of forests that offer a conducive place for the growth of endemic tree species...
8 Pages(2000 words)Assignment
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.
Let us find you another Assignment on topic Degradation of Green Tea Catechins in Tea Drinks for FREE!
logo footer
Contact us:
+16312120006
Contact Us Now
FREE Mobile Apps:
  • StudentShare App Store
  • StudentShare Google play
  • About StudentShare
  • Testimonials
  • FAQ
  • Blog
  • Free Essays
  • New Essays
  • Essays
  • Miscellaneous
  • The Newest Essay Topics
  • Index samples by all dates
Join us:
Contact Us