Thermogravimetric analysis of the total lipids extracted from the fatty tissue of fallow deer (Cervus Dama dama L)

Abstract

Thermogravimetry, TG, of lipids is an appropriate analytical method, commonly used to correlate the kinetic parameters of the thermal degradation of lipids and their composition. Thus, samples of total lipids extracted from the raw fatty tissue of fallow deer were subjected to non-oxidative and oxidative TG analysis. The samples were previously stored for nine months at +4 ?C and -18?C. The material stability was investigated in order to establish the most favorable conditions for the production and storage of different foods. The total lipids were extracted according to the Folch method. The identification and quantitative analysis of the methyl esters of the fatty acids of the total lipids were performed by capillary gas chromatography. Based on the non-oxidative and oxidative TG results, the activation energies of the thermal degradation and oxidation of the total lipids extracted from different samples of fatty tissue were determined. The Doyle-Gorbachev method was used for the calculations. .

Comparative Study on Oxidative Decomposition Behavior of Vegetable Oils and Its Correlation with Iodine Value Using Thermogravimetric Analysis

“…Other than DSC, TGA has been widely applied in the monitoring of oxidative stability, thermal behavior, kinetic parameters and activation energy in various oil samples [13][14][15][16][17] . It can also be used to determine fraction volatile components by monitoring the weight change as the sample is heated.…”

A conscious rethink: Why is brain tissue commonly preserved in the archaeological record? Commentary on: Petrone P, Pucci P, Niola M, et al. Heat-induced brain vitrification from the Vesuvius eruption in C.E. 79. N Engl J Med 2020;382:383-4. DOI: 10.1056/NEJMc1909867

“…Additionally, the Delplancke et al (2018) study referred to by Petrone et al (2020) demonstrates that these metabolites are found at significantly increased concentrations in the hair of pregnant women with gestational diabetes mellitus, rather than as major lipid components. The survival of fatty acids attributed to brain and hair seems inconsistent with temperatures sufficiently high for the vitrification of wood (482-524°C; Petrone et al 2020, Sup Figure S5), at which temperatures not only are these fatty acids volatile, but also unstable (Milovanović et al 2006;Li et al 2018).…”