Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Modulated temperature differential scanning calorimetry for examination oftristearin polymorphism: 2. Isothermal crystallization of metastable forms
Autore:
Singh, SK; Jalali, AF; Alden, M;
Indirizzi:
Pharmacia & Upjohn AB, Dept Pharmaceut Technol, S-75182 Uppsala, Sweden Pharmacia & Upjohn AB Uppsala Sweden S-75182 ol, S-75182 Uppsala, Sweden Univ Uppsala, Ctr Biomed, Dept Pharmaceut Chem Phys & Inorgan Chem, S-75123 Univ Uppsala Uppsala Sweden S-75123 ut Chem Phys & Inorgan Chem, S-75123
Titolo Testata:
JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY
fascicolo: 4, volume: 76, anno: 1999,
pagine: 507 - 510
SICI:
0003-021X(199904)76:4<507:MTDSCF>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
SATURATED MONOACID TRIGLYCERIDES; TRANSITIONS;
Keywords:
crystallization; differential scanning calorimetry; metastable forms; MTDSC; modulated temperature; oscillating; phase behavior; polymorphism; triglycerides; tristearin;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
9
Recensione:
Indirizzi per estratti:
Indirizzo: Singh, SK Pharmacia & Upjohn Inc, 7000 Portage Rd, Kalamazoo, MI 49001 USAPharmacia & Upjohn Inc 7000 Portage Rd Kalamazoo MI USA 49001 SA
Citazione:
S.K. Singh et al., "Modulated temperature differential scanning calorimetry for examination oftristearin polymorphism: 2. Isothermal crystallization of metastable forms", J AM OIL CH, 76(4), 1999, pp. 507-510

Abstract

The transformations of tristearin were examined by modulated temperature differential scanning calorimetry (MTDSC) in order to examine the utility ofthis technique. Tristearin has been used as a model polymorphic system, showing metastable phases and complicated transformation routes occurring at relatively slow rates. The beta'-forms generated by thermal treatment undermodulation do not differ significantly from those generated by the corresponding treatment without modulation. While the total heat flow thermograms are similar, the deconvoluted reversing component shows that annealing, especially at 63 degrees C, has a significant effect on the crystal size and perfection of the solid phases formed. MTDSC also enables the melting of beta' to be separated from the simultaneous crystallization of the beta form as evidenced in the c(p) component. Quantitative interpretations about such systems cannot be drawn from MTDSC at this point in time.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/07/20 alle ore 23:48:17