Glass transition and time-dependent crystallization behavior of dehydration bioprotectant sugars
It has been suggested that the crystallization of a sugar hydrate can provide additional desiccation by removing water from the amorphous phase, thereby increasing the glass transition temperature (Tg). However, present experiments demonstrated that in single sugar systems, if relative humidity is e...
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2010
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| LEADER | 09492caa a22014777a 4500 | ||
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| 001 | PAPER-8132 | ||
| 003 | AR-BaUEN | ||
| 005 | 20230518203756.0 | ||
| 008 | 190411s2010 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-72649104280 | |
| 024 | 7 | |2 cas |a raffinose, 512-69-6; trehalose, 99-20-7; water, 7732-18-5; Raffinose, 512-69-6; Trehalose, 99-20-7; Water, 7732-18-5 | |
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 030 | |a CRBRA | ||
| 100 | 1 | |a Schebor, C. | |
| 245 | 1 | 0 | |a Glass transition and time-dependent crystallization behavior of dehydration bioprotectant sugars |
| 260 | |c 2010 | ||
| 270 | 1 | 0 | |m Schebor, C.; Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Ciudad de Buenos Aires, Argentina; email: cschebor@di.fcen.uba.ar |
| 506 | |2 openaire |e Política editorial | ||
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| 520 | 3 | |a It has been suggested that the crystallization of a sugar hydrate can provide additional desiccation by removing water from the amorphous phase, thereby increasing the glass transition temperature (Tg). However, present experiments demonstrated that in single sugar systems, if relative humidity is enough for sugar crystallization, the amorphous phase will have a short life. In the conditions of the present experiments, more than 75% of amorphous phase crystallized in less than one month. The good performance of sugars that form hydrated crystals (trehalose and raffinose) as bioprotectants in dehydrated systems is related to the high amount of water needed to form crystals, but not to the decreased water content or increased Tg of the amorphous phase. The latter effect is only temporary, and presumably shorter than the expected shelf life of pharmaceuticals or food ingredients, and is related to thermodynamic reasons: if there is enough water for the crystal to form, it will readily form. © 2009 Elsevier Ltd. All rights reserved. |l eng | |
| 536 | |a Detalles de la financiación: Universidad de Buenos Aires, UBACYT 024 | ||
| 536 | |a Detalles de la financiación: Agencia Nacional de Promoción Científica y Tecnológica, PICT 32916, PICT 20545 | ||
| 536 | |a Detalles de la financiación: PIP 5977, PIP 0468 | ||
| 536 | |a Detalles de la financiación: The authors acknowledge financial support from Universidad de Buenos Aires UBACYT 024, CONICET PIP 5977 and PIP 0468, Agencia Nacional de Promoción Científica y Tecnológica (PICT 20545 and PICT 32916). | ||
| 593 | |a Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Ciudad de Buenos Aires, Argentina | ||
| 593 | |a Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Ciudad de Buenos Aires, Argentina | ||
| 593 | |a Members of CONICET, Argentina | ||
| 690 | 1 | 0 | |a CRYSTALLIZATION |
| 690 | 1 | 0 | |a HYDRATED CRYSTALS |
| 690 | 1 | 0 | |a RAFFINOSE |
| 690 | 1 | 0 | |a STABILIZING AGENTS |
| 690 | 1 | 0 | |a TREHALOSE |
| 690 | 1 | 0 | |a AMORPHOUS PHASE |
| 690 | 1 | 0 | |a BIOPROTECTANT |
| 690 | 1 | 0 | |a CRYSTALLIZATION BEHAVIOR |
| 690 | 1 | 0 | |a FOOD INGREDIENTS |
| 690 | 1 | 0 | |a GLASS TRANSITION TEMPERATURE |
| 690 | 1 | 0 | |a RAFFINOSE |
| 690 | 1 | 0 | |a RELATIVE HUMIDITIES |
| 690 | 1 | 0 | |a SHELF LIFE |
| 690 | 1 | 0 | |a STABILIZING AGENTS |
| 690 | 1 | 0 | |a TIME-DEPENDENT |
| 690 | 1 | 0 | |a ATMOSPHERIC HUMIDITY |
| 690 | 1 | 0 | |a CRYSTALLIZATION |
| 690 | 1 | 0 | |a GLASS |
| 690 | 1 | 0 | |a HYDRATES |
| 690 | 1 | 0 | |a HYDRATION |
| 690 | 1 | 0 | |a SUGAR (SUCROSE) |
| 690 | 1 | 0 | |a SUGARS |
| 690 | 1 | 0 | |a WATER CONTENT |
| 690 | 1 | 0 | |a GLASS TRANSITION |
| 690 | 1 | 0 | |a RAFFINOSE |
| 690 | 1 | 0 | |a TREHALOSE |
| 690 | 1 | 0 | |a WATER |
| 690 | 1 | 0 | |a ARTICLE |
| 690 | 1 | 0 | |a CRYSTALLIZATION |
| 690 | 1 | 0 | |a DIFFERENTIAL SCANNING CALORIMETRY |
| 690 | 1 | 0 | |a GLASS TRANSITION TEMPERATURE |
| 690 | 1 | 0 | |a HUMIDIFIER |
| 690 | 1 | 0 | |a HUMIDITY |
| 690 | 1 | 0 | |a PHASE TRANSITION |
| 690 | 1 | 0 | |a PRIORITY JOURNAL |
| 690 | 1 | 0 | |a STORAGE |
| 690 | 1 | 0 | |a CRYSTALLIZATION |
| 690 | 1 | 0 | |a FREEZE DRYING |
| 690 | 1 | 0 | |a GLASS |
| 690 | 1 | 0 | |a HUMIDITY |
| 690 | 1 | 0 | |a KINETICS |
| 690 | 1 | 0 | |a PHASE TRANSITION |
| 690 | 1 | 0 | |a RAFFINOSE |
| 690 | 1 | 0 | |a TRANSITION TEMPERATURE |
| 690 | 1 | 0 | |a TREHALOSE |
| 690 | 1 | 0 | |a WATER |
| 700 | 1 | |a Mazzobre, M.F. | |
| 700 | 1 | |a Buera, M.d.P. | |
| 773 | 0 | |d 2010 |g v. 345 |h pp. 303-308 |k n. 2 |p Carbohydr. Res. |x 00086215 |w (AR-BaUEN)CENRE-301 |t Carbohydrate Research | |
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