TY - JOUR
T1 - Application of photoacoustic spectroscopy to the optical study of pigments in corn pericarp
T2 - Spectral separation of optical absorption centres
AU - Muñoz Hernández, Rocío A.
AU - Calderón, Antonio
AU - Cruz Orea, Alfredo
AU - Tomás, Sergio A.
AU - Sánchez Sinencio, Feliciano
AU - Peña Rodríguez, Gabriel
PY - 2000
Y1 - 2000
N2 - The optical absorption centres in corn pericarp biopolymers have been studied by photoacoustic spectroscopy and the phase-resolved technique. The results show that the optical absorption spectra of these samples are formed by the superposition of two absorption bands, one of these corresponding to the cellulose of the epidermis and the other to o-glucoside pigments of flavonoid type which are bound to hemicellulose sugars. A spatial separation was obtained of the materials responsible for these absorption bands as a function of the Ca(OH)2 concentration used in the alkaline cooking process which is the result of hemicellulose dissolution in these biopolymers.
AB - The optical absorption centres in corn pericarp biopolymers have been studied by photoacoustic spectroscopy and the phase-resolved technique. The results show that the optical absorption spectra of these samples are formed by the superposition of two absorption bands, one of these corresponding to the cellulose of the epidermis and the other to o-glucoside pigments of flavonoid type which are bound to hemicellulose sugars. A spatial separation was obtained of the materials responsible for these absorption bands as a function of the Ca(OH)2 concentration used in the alkaline cooking process which is the result of hemicellulose dissolution in these biopolymers.
UR - http://www.scopus.com/inward/record.url?scp=0034393291&partnerID=8YFLogxK
U2 - 10.1068/htwu443
DO - 10.1068/htwu443
M3 - Artículo
SN - 0018-1544
VL - 32
SP - 379
EP - 383
JO - High Temperatures - High Pressures
JF - High Temperatures - High Pressures
IS - 4
ER -