Search results for " TGA"
showing 4 items of 14 documents
Effect of Heating Time and Temperature on the Chemical Characteristics of Biochar from Poultry Manure
2014
Poultry manure (PM) chars were obtained at different temperatures and charring times. Chemical-physical characterization of the different PM chars was conducted by cross-polarization magic angle spinning (CPMAS) (13)C NMR spectroscopy and thermal analysis. CPMAS (13)C NMR spectra showed that the chemical composition of PM char is dependent on production temperature rather than on production duration. Aromatic and alkyl domains in the PM chars obtained at the lowest temperatures remained unchanged at all heating times applied for their production. The PM char obtained at the highest temperature consisted only of aromatic structures having chemical nature that also appeared invariant with hea…
Sustainable nanocomposites based on halloysite nanotubes and pectin/polyethylene glycol blend
2013
Abstract This study was focused on the preparation and characterization of biofilms based on pectin/polyethylene glycol 20000 (PEG) blend and halloysite nanotubes (HNTs). The obtained blends loaded with a natural nanoclay are proposed as sustainable alternative to the polymers produced from non-renewable resources such as fossil fuels. Properties of technological interest have been monitored and they were correlated to the structural features of the nanocomposites. It turned out that the wettability of the films can be tuned by changing the composition and the distribution of HNTs into the material as well as the surface roughness. The tensile properties of the blend are enhanced by the pre…
Estados funcionales de los linfocitos Tgamma delta en sangre periférica en pacientes con cáncer de colon
2021
Estados funcionales de los linfocitos Tgamma delta en sangre periférica en pacientes con cáncer de colon ANTECEDENTES: El cáncer de colon es uno de los tumores más frecuentes y que más mortalidad causa a nivel mundial. Sabemos que el sistema inmune (SI) es uno de los principales reguladores en el desarrollo de las neoplasias y la capacidad de memoria de los linfocitos T es considerada crítica en la respuesta duradera frente al cáncer. Los linfocitos Tgamma delta son unos componentes singulares del SI que presentan amplia plasticidad fenotípica y funcional con respecto a los tumores pero, por el momento, se desconoce el papel que los Tgamma delta memoria juegan frente al cáncer. HIPÓTESIS: L…