Molecular investigation of valonea tannin
Küçük Resim Yok
Tarih
2007
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Amer Leather Chemists Assn
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Valonea is one of many well-known vegetable tannins used in tanning and retanning processes for leather making. Although it is used extensively in the leather industry, its main components and chemical structure are only gradually being identified. In order to investigate the chemical structure of valonea with novel techniques, MALDI-TOF (Matrix-Assisted Laser Desorption/Ionisation Time-of-Flight) and FTIR (Fourier Transform Infrared) Spectroscopy were used. The MALDI-TOF spectrum showed the presence of low molecular weight fraction of hydrolysable tannins such as nonahydroxytriphnoic, flavogallonic acid, ellagic and gallic acid, pentagalloylglucose and all sorts of degradation and oxidation products which are thought to be major components of valonea tannin. Moreover, castalagin/vescalagin and those added by a few residual structures/atoms, thus creating larger molecule and greater mass than castalagin/vescalagin, derived by internal rearrangements of a larger molecule constitute major components of valonea.
Açıklama
Anahtar Kelimeler
Kaynak
Journal of the American Leather Chemists Association
WoS Q Değeri
Q3
Scopus Q Değeri
Q3
Cilt
102
Sayı
5
