Naslov
Application of FTIR Spectroscopy and Molecular Modeling in Studing of Chemical Change During the Process of Extrusion
(Application of FTIR spectroscopy and molecular modeling in studing of chemical change during the process of extrusion)

Autori
Kovaček, Damir ; Miljević, Ivana ; Ninčević, Antonela ; Tripalo, Branko

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
XVIII. Hrvatski skup kemičara i kemijskih inženjera / Zrnčević, Stanka - Zagreb : Hrvatsko društo kemijskih inženjera i tehnologa, Hrvatsko kemijsko društvo, 2003

ISBN
953-6894-08-4

Skup
XVIII. Hrvatski skup kemičara i kemijskih inženjera

Mjesto i datum
Zagreb, Hrvatska, 16.02.2003. - 19.02.2003

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Domaća recenzija

Ključne riječi
Extrusion; Isopeptide bond; Molecular modeling; FTIR spectroscopy
(extrusion; isopeptide bond; molecular modeling; FTIR spectroscopy)

Sažetak
Food extrusion has been practiced for over 50 years and extension of its applications occured followed requirements: processing of relatively dry viscous materials, improved textural and flavour characteristics of food, control of the thermal changes of food constituentes and use of unconventional ingredientes. The food extruder is a high temperature short time bioreactor that transforms a variety of raw ingredientes into modificed intermediate and finished products. Several investigations have shown that hight temperature and pressure may cause physical and chemical changes in the structure of biopolymers. The concequences of these modifications are the changes in nutritional value and functionality (viscosity, solubility) of food ingredientes. Thus, the our investigations was considered on the chemical changes after the process of extrusion. To follow these changes, we were using theoretical quantum mechanical methods (ab initio ; HF/6-31-G* and semiempirical, Am1) applying Spartam and Gaussian 94 computer programs. In the same time we were analysed real samples by FTIR spectroscopy, which has proven useful in study of chemical changes, comparing with the theoretical calculations.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA