Go to Home Page...
Web Level1Diet.com
Subscribe to our RSS feeds...
Home Foods to Eat Foods to Avoid Exercise Supplements Weight Loss News Diabetes News Your Concerns Archived Reports

Bookmark Us: Yahoo Del.icio.us Simpy Technorati Email a friend Print

Prediction of Japanese green tea ranking by gas chromatography/mass spectrometry-based hydrophilic metabolite fingerprinting.

<< Prev Report
Refine Your Search:

All Words Any Words
Next Report >>

An innovative technique for green tea's quality determination was developed by means of metabolomics. Gas-chromatography coupled with time-of-flight mass spectrometry and multivariate data analysis was employed to evaluate the quality of green tea. Alteration of green tea varieties and manufacturing processes effects a variation in green tea metabolites, which leads to a classification of the green tea's grade. Therefore, metabolic fingerprinting of green tea samples of different qualities was studied. A set of ranked green tea samples from a Japanese commercial tea contest was analyzed with the aim of creating a reliable quality-prediction model. Several multivariate algorithms were performed. Among those, the partial least-squares projections to latent structures (PLS) analysis with the spectral filtering technique, orthogonal signal correction (OCS), was found to be the most practical approach. In addition, metabolites that play an important role in green tea's grade classification were identified.

Authored by Pongsuwan W, Fukusaki E, Bamba T, Yonetani T, Yamahara T, Kobayashi A. Department of Biotechnology, Graduate School of Engineering, Osaka University, Japan.

Published in J Agric Food Chem. 2007 Jan 24;55(2):231-6. The full report is available online. link   A subscription to the periodical may be required.

<< Prev Report Next Report >>

* All information on Level1Diet.com is for educational purposes only. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease. Before changing your diet, or adding supplements to your diet, or beginning an exercise program, everyone should consult a qualified and licensed health practitioner; a physician, dietician or similar professional.

spacer spacer

Over 1,532 new health studies are published every day ― 559,288 per year. Join our weekly update program to stay informed...

» About Health Updates


Donate a few dollars
to help us promote
anti-inflammatory health.

Bigger Font Size Smaller Font Size Left Align Justify Align Right Align Bookmark This Page
Search 1.49 Million
Health Studies

» List of 4,000+ Diseases


Subscribe to
Health Reports

Add to Google Reader or Homepage
Subscribe in NewsGator Online
Subscribe in Bloglines
Add to Excite MIX
Add to netvibes
Add to fwicki
Subscribe in NewsAlloy
Add to My AOL
Add to The Free Dictionary
Add to Pageflakes

[Valid RSS]

About Us Contact Us Privacy Free Newsletter Health FAQs Terms of Use

 Subscribe in a reader

© 2009 Level1Diet.com, All Rights Reserved.     Contact: