Találati lista | Tudóstér

001-es BibID:	BIBFORM085165
Első szerző:	Nagy Dávid (kémikus)
Cím:	Thermospectrometry : a new method to follow the thermal processes with spectrometric methods / Dávid Nagy, Csaba Falussy, József Posta
Dátum:	2014
ISSN:	1388-6150
Megjegyzések:	Thermospectrometry, a new and unique material testing and analytical method has been developed by combining thermal analysis with atom and molecule spectrometry. The central unit of the method is a stationary furnace that can be heated up to 1700 C. Nanoparticles of solid, liquid or gaseous samples travel upwards between the two heated walls of the furnace placed 10 mm from each other, where conversion and decomposition processes occur separately in time and space according to the thermal properties of substances. The formation and decomposition of molecules, atoms and ions can be observed directly with narrow light beams of spectral lamps heights of the furnace (maximum of 200 mm). The developed method has been used for studying the atomization of inorganic and organic water soluble mercury salts.
Tárgyszavak:	Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Thermospectrometry Spectrometry Thermal analysis Material conversion processes Mercury compounds Stationary furnace
Megjelenés:	Journal of Thermal Analysis and Calorimetry. - 115 : 1 (2014), p. 323-329. -
További szerzők:	Falussy Csaba Posta József (1948-) (vegyész, analitikus)
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon:

001-es BibID:	BIBFORM103963
035-os BibID:	(WOS)000522021900002 (Scopus)85082415468
Első szerző:	Todea, Anamaria
Cím:	Thermal behavior of oligo[(epsilon-caprolactone)-co-delta-gluconolactone] enzymatically synthesized in reaction conditions optimized by experimental design / Anamaria Todea, Diana Aparaschivei, Ioan Bîtcan, Ionuț Valentin Ledeți, Geza Bandur, Francisc Péter, Lajos Nagy, Sándor Kéki, Emese Biró
Dátum:	2020
ISSN:	1388-6150 1588-2926
Megjegyzések:	The thermal behavior of co-oligomers of epsilon-caprolactone (ECL) with gluconolactone, compared to the epsilon-caprolactone oligomer, has been assessed by thermogravimetric analysis, while differential scanning calorimetry was used to evaluate the melting comportment. As the insertion of more hydrophilic structural units can improve the properties and functionalities of the ECL oligoesters, the enzymatic in vitro oligomerization process was optimized by a 3-factorial/3-level experimental design, using the Box-Behnken method. The selected independent variables were the temperature, the enzyme amount, and the molar ratio of monomers, while the co-oligomerization degree and the mass average molecular mass (calculated from MALDI-TOF MS data) were the response variables. The results indicate that temperature has the most significant effect and is directly correlated with the formation of linear co-oligoesters. The overall effect of the other variables was also significant. The thermogravimetric analysis of the co-oligomer synthesized in the optimized conditions indicated a decrease of the thermal stability and compared to the ECL oligomer. Thermoanalytical techniques can consistently improve the utilization efficiency of polymer-based formulations in pharmaceutical and medical applications.
Tárgyszavak:	Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Biocatalysis Enzymatic oligomerization Thermal analysis Lipaseepsilon-caprolactone delta-gluconolactone
Megjelenés:	Journal of Thermal Analysis and Calorimetry. - 141 : 3 (2020), p. 1017-1026. -
További szerzők:	Aparaschivei, Diana Bîtcan, Ioan Ledeți, Ionuț Valentin Bandur, Geza Péter, Francisc Nagy Lajos (1979-) (vegyész) Kéki Sándor (1964-) (polimer kémikus) Biro, Emese
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon: