Pregled bibliografske jedinice broj: 192338
Crystal polymorphism in several saccharides
Crystal polymorphism in several saccharides // Jedanaesti godišnji sastanak Hrvatskog društva za elektronsku mikroskopiju
Zagreb, Hrvatska, 2003. (poster, domaća recenzija, neobjavljeni rad, znanstveni)
CROSBI ID: 192338 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Crystal polymorphism in several saccharides
Autori
Mohaček Grošev, Vlasta ; Gajović, Andreja
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, neobjavljeni rad, znanstveni
Skup
Jedanaesti godišnji sastanak Hrvatskog društva za elektronsku mikroskopiju
Mjesto i datum
Zagreb, Hrvatska, 12.12.2003
Vrsta sudjelovanja
Poster
Vrsta recenzije
Domaća recenzija
Ključne riječi
electron microscopy; Raman spectroscopy; glyceraldehyde; glycolaldehyde; dihydroxyacetone
Sažetak
Scanning electron microscopy micrographs were recorded with JEOL T300 instrument operating at 10 kV. All samples were carbon coated. Raman spectra from 10 - 300 cm-1 were recorded with DILOR Z24 Raman spectrometer. Samples were cooled with CTI CRYOGENICS closed cycle Helium cryostat. Chemicals were products of Sigma Aldrich, purity 98 % or better. Dihidroxyacetone (2, 5-dihydroxymethyl-2, 5-dihydroxy-1, 4-dioxane) exhibits the most complex behaviour, having 5 crystal modifications. In the SEM photograph small dark spots present may indicate the pores through which water evaporated in the electron beam. In the low frequency Raman spectra the same number of phonons is expec-ted to be observed for dioxane and for glyceraldehyde - six. We can com- pare the phonons positions of glycolal- dehyde with those of dioxane, and as- sign the OH torsion to the 240 cm-1 band.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
POVEZANOST RADA
Ustanove:
Institut "Ruđer Bošković", Zagreb