NDLI: Composition of pyrolyzate from Japanese green tea

Content Provider	Springer Nature Link
Author	Sakasegawa, Miyusse Yatagai, Mitsuyoshi
Copyright Year	2005
Abstract	Green tea is a beverage that is produced by hot-water extraction of the leaves of tea (Camellia sinensis L.). As the amount of green tea consumption has increased, the importance of using the residue has grown. To address this problem, chemical compositions of two pyrolyzates obtained with an electric kiln, L and G, which were obtained from the tea leaf product and its hot-water extraction residue, respectively, were examined. Both pyrolyzates were alkaline, in contrast to the acidic pHs that are typical of pyrolyzates from wood materials. The major constituents were nitrogen-containing compounds, which accounted for up to about 70% (based on gas chromatography-mass spectrometry peak area). Caffeine was the main compound in both samples, although it might not be a pyrolysis product but actually sublimates from the samples and then condenses back into the pyrolyzates. Other nitrogen-containing compounds were formed mainly from proteins and amino acids. Acids and phenols, which are typical components in pyrolyzates obtained from wood materials and contribute to acidic pH, were rare in both samples. Other neutral compounds are known as compounds in pyrolyzates from wood materials. The pyrolyzates obtained in this experiment were novel and may have new uses.
Starting Page	73
Ending Page	76
Page Count	4
File Format	PDF
ISSN	14350211
Journal	Journal of Wood Science
Volume Number	51
Issue Number	1
e-ISSN	16114663
Language	English
Publisher	Springer-Verlag
Publisher Date	2005-02-25
Publisher Place	Tokyo
Access Restriction	Subscribed
Subject Keyword	Japanese green tea Nitrogen-containing compounds Caffeine Alkalinity Characterization and Evaluation Materials Ceramics, Glass, Composites, Natural Methods Wood Science & Technology
Content Type	Text
Resource Type	Article
Subject	Biomaterials Forestry

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