Linked Life Data

19881283

Source:http://linkedlifedata.com/resource/pubmed/id/19881283

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
11
pubmed:dateCreated
2009-11-2
pubmed:abstractText
The polyphenolic composition of Camellia irrawadiensis, which is a closely related species of Camellia sinensis (cultivated tea), was investigated. The most predominant polyphenol, a kind of ellagitannin, was isolated from leaves of C. irrawadiensis. Its structure was established as 1,2-di-O-galloyl-4,6-O-(S)-hexahydroxydiphenoyl-beta-D-glucose (2) on the basis of spectral and chemical evidence. Moreover, the polyphenols [catechins, strictinin (1), compound 2, theogallin, and gallic acid] and two methylxanthines (theobromine and caffeine) in leaves of C. irrawadiensis were determined by HPLC-Photodiode array detector analysis, and were compared to those in C. sinensis and Camellia taliensis. Total catechin content in C. irrawadiensis was lower than that in C. sinensis and C. taliensis. Theobromine content in C. irrawadiensis was higher than that in C. sinensis and C. taliensis. The content of 2 in C. irrawadiensis was 8.4% of dry leaf weight and comprised approximately 60% of the total polyphenols detected, while the compound was not detected in C. sinensis and was reported to be 2.4% in C. taliensis.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
1347-5223
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
57
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1284-8
pubmed:dateRevised
2011-11-17
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
Identification of a major polyphenol and polyphenolic composition in leaves of Camellia irrawadiensis.
pubmed:affiliation
Food Research Laboratories, Mitsui Norin Co., Ltd., 223-1 Miyabara, Fujieda, Shizuoka 426-0133, Japan. kyagi@mitsui-norin.co.jp
pubmed:publicationType
Journal Article