In this thesis the effects of tocopherols and ascorbic acid on the formation and decomposition of methyl linoleate hydroperoxides (ML-OOH) were evaluated. The results contribute to the understanding of the antioxidant action of tocopherols and ascorbic acid during lipid oxidation reaction sequences. α-and γ-Tocopherols at 10-1000 ppm levels efficiently inhibited the formation of ML-OOH during t...

According to the free radical theory by Harman, free radicals formed under various conditiors can cause the changes in DNA, which may result in chromosomal aberrations, and can initiate lipid peroxidation in subcellular and cellular membrane systems. The accumulation cf lipofuscin with age .also supports the significance of lipid peroxidation on aging. In this paper·;two lines of research were ...

Abstract Nitrification is a major process within the nitrogen (N) cycle leading to global losses of N, including fertiliser from natural and agricultural systems producing significant nitrous oxide emissions. One strategy for mitigation these involves nitrification inhibition by plant-derived biological inhibitors (BNIs). Cultivation-based studies BNIs, screening new compounds, have predominant...

A non-invasive method to characterize human mesenchymal stromal cells during adipogenic differentiation was developed for the first time. Seven fatty acid methyl esters (FAMEs), including methyl laurate, methyl myristate, methyl palmitate, methyl linoleate, methyl oleate, methyl elaidate and methyl stearate, were used for characterizing adipogenic differentiation using headspace solid-phase mic...

Three strains of Mycoplasma, M. laidlawii A and B, and Mycoplasma sp. A60549, were grown in broth containing sodium acetate-1-C(14). The methyl esters of the phospholipid fatty acids of harvested radioactive cells were prepared and identified by comparison of their mobilities to known radioactive fatty acid methyl esters by use of a modified reversed-phase partition-thin layer chromatographic t...

Oviposition attractants for the house fly Musca domestica have been investigated using electrophysiological tests, behavioural assays and field tests. Volatiles were collected via head space absorption method from fermented wheat bran, fresh wheat bran, rearing substrate residue and house fly maggots. A Y-tube olfactometer assay showed that the odor of fermented wheat bran was a significant att...

While the coupled oxidation of carotene and oils has been studied in some detail (l-7), the r6le of other carotenoids in oxidizing oils is imperfectly understood. Indications that bixin is oxidatively destroyed in a manner similar to carotene were given in the study of lipoxidase by Sumner and Smith (8). Solutions of bixin were also observed to be vastly more stable than similar solutions of ca...

The discovery of heterogeneous catalysts synthesized in easy, sustainable ways for the valorization olefins derived from renewable biomass is attractive environmental, sustainability, and economic viewpoints. Here, an organic–inorganic hybrid catalyst formulated as [MoO3(Hpto)]·H2O (2), where Hpto = 5-(2-pyridyl-1-oxide)tetrazole, was prepared by a hydrolysis–condensation reaction complex [MoO2...