Sorption isotherm and calorimetric behavior of amorphous/crystalline raffinose-water systems

The water adsorption and desorption isotherms at 27 °C of initially amorphous raffinose over a range of relative humidity of 11% to 97% have been determined. Upon adsorption, the isotherm exhibited a 'quasi' plateau, and the moisture content at this plateau was found to be very close to th...

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Autor principal: Iglesias, H.A
Otros Autores: Schebor, C., Buera, M.P, Chirife, J.
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2000
Acceso en línea:Registro en Scopus
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100 1 |a Iglesias, H.A. 
245 1 0 |a Sorption isotherm and calorimetric behavior of amorphous/crystalline raffinose-water systems 
260 |c 2000 
506 |2 openaire  |e Política editorial 
504 |a Buera, M.P., Rossi, S., Moreno, S., Chirife, J., DSC confirmation that vitrification is not necessary for stabilization of the restriction enzyme EcoRI dried with saccharides (1999) Biotech Progr, 15, pp. 577-579 
504 |a Colaço, C., Sen, S., Thangavelu, M., Pinder, S., Roser, B., Extraordinary stability of enzymes dried in trehalose: Simplified molecular biology (1992) Bio/Tech, 10, p. 1 
504 |a Crowe, J.H., Carpenter, J.F., Crowe, J.H., The role of vitrification in anhydrobiosis (1998) Ann Rev Physiol, 60, pp. 73-103 
504 |a Demertzis, P.G., Riganakos, K.A., Kontominas, M.G., Water sorption isotherms of crystalline raffinose by inverse gas chromatography (1989) Int J Food Sci Tech, 24, pp. 629-636 
504 |a Fox, K.C., Putting proteins under glass (1995) Science, 267, pp. 1922-1923 
504 |a Franks, F., Long-term stabilization of biomolecules (1994) Bio/Tech, 12, pp. 253-256 
504 |a Iglesias, H.A., Chirife, J., Delayed crystallization of amorphous sucrose in humidified freeze-dried model systems (1978) Food Tech, 13, pp. 137-144 
504 |a Iglesias, H.A., Buera, M.P., Chirife, J., Adsorption isotherm of amorphous trehalose (1997) J Sci Food Agri, 75, pp. 183-186 
504 |a Kajiwara, K., Franks, F., Crystalline and amorphous phases in the binary system water-raffinose (1998) Proceedings of the Poster Session, p. 1620. , Roos Y, Leslie J, Lillford P. editors May 3-6; Helsinki, Finland. ISOPOW 7 
504 |a Koster, K.L., Leopold, A.C., Sugars and desiccation tolerance in seeds (1988) Plant Physio, 88, pp. 829-832 
504 |a Raemy, A., Kaabi, C., Ernst, E., Vuataz, G., Precise determination of low level sucrose amorphism by microcaiorimetry (1993) J Thermal Analy, 40, pp. 437-444 
504 |a Roos, Y., Time-dependent phenonmena (1995) Phase Transitions in Foods, pp. 193-240. , Taylor S, editor New York: Academic Press 
504 |a Roos, Y., Karel, M., Crystallization of amorphous lactose (1992) J Food Sci, 57, pp. 775-777 
504 |a Rossi, S., Buera, M.P., Moreno, S., Chirife, J., Stabilization of the restriction enzyme EcoRI dried with trehalose and other selected glass-forming solutes (1997) Biotech Progr, 13, pp. 609-616 
504 |a Saleki-Gerhardt, A., Stowell, J.G., Byrn, S.R., Zografi, G., Hydration and dehydration of crystalline asid amorphous forms of raffinose (1995) J Pharm Sci, 84, pp. 318-323 
504 |a Slade, L., Levine, H., Beyond water activity: Recent advances based on an alternative approach to the assessment of food quality and safety (1991) Crit Rev Food Sci Nutr, 30, pp. 115-360 
504 |a Uritani, M., Takai, M., Yoshinaga, K., Protective effect of disaccharides on restriction endonuclease during drying under vacuum (1995) J Biochem, 117, pp. 774-779 
520 3 |a The water adsorption and desorption isotherms at 27 °C of initially amorphous raffinose over a range of relative humidity of 11% to 97% have been determined. Upon adsorption, the isotherm exhibited a 'quasi' plateau, and the moisture content at this plateau was found to be very close to the amount required to form the crystalline raffinose pentahydrate (R.5 H2O). Crystallization of raffinose (R.5 H2O) during water adsorption at 52% and 58% RH was indicated by differential scanning calorimetry (DSC); both thermograms showed an endothermal peak of melting corresponding to R.5H2O. The results of the crystallization kinetics at 52% and 58% RH indicated that the tame to assess the stable physical state in a sugar system for a given external condition has to be properly defined and depends on the (T-T(g)) value.  |l eng 
593 |a Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, (1428) Buenos Aires, Argentina 
593 |a CONICET, Argentina 
690 1 0 |a AMORPHOUS 
690 1 0 |a CRYSTALLIZATION 
690 1 0 |a GLASS TRANSITION 
690 1 0 |a ISOTHERMS 
690 1 0 |a RAFFINOSE 
700 1 |a Schebor, C. 
700 1 |a Buera, M.P. 
700 1 |a Chirife, J. 
773 0 |d 2000  |g v. 65  |h pp. 646-650  |k n. 4  |p J. Food. Sci.  |x 00221147  |w (AR-BaUEN)CENRE-325  |t Journal of Food Science 
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