Merkl R., Hrádková I., Filip V., Šmidrkal J. (2010): Antimicrobial and antioxidant properties of phenolic acids alkyl esters. Czech J. Food Sci., 28: 275–279. Some phenolic acids alkyl esters (methyl, ethyl, propyl, butyl and hexyl) and determine their antioxidant and antimicrobial activities were prepared. The antimicrobial activity against the tested microorganisms escherichia coli DMF 7503, ...

The dried aerial parts of the mountain tea Sideritis euboea were extracted using n-hexane, methanol, diethyl ether, ethyl acetate, and n-butanol. The residues were tested for their antioxidant activity on sunflower oil at 50 degrees C under UV light. The oxidation of the sunflower oil was measured using PV, absorbance E(1%)1 cm, and malondialdehyde by high-performance liquid chromatography (HPL...

In this chapter selected methods used in plant lipid analyses are discussed. The first step of fat analysis consists in the isolation of lipid components from the plant matrix, thus in the first section the most popular methods of isolation are described. Afterwards, due to the complicated mixture of lipid components their separation is required where different types of chromatography technique...

In the present study, phenolic extracts and fractions from Canadian rowanberry (Sorbus aucuparia) and crabapple (Malus baccata) were screened for antioxidant activity using DPPH radical scavenging activity, and β-carotene bleaching assays. Furthermore, rapeseed oil was supplemented with extracts/fractions and performance was assessed during accelerated storage at 65°C, under Rancimat at 120°C, ...

This study was performed to optimize and validate Rancimat (Metrohm Ltd., Herisau, Switzerland) operational parameters including temperature, air-flow, sample weight minimize Induction-Time (IT) IT-Coefficient-of-Variation (CV), using Response Surface Methodology (RSM). According a Box–Behnken experimental design, walnut oil equivalent 3-, 6-, or 9-g added each reaction vessel heated 100, 110, ...

This study aimed to evaluate the quality of selected oils from seeds herbs and vegetables (basil, fenugreek, coriander, tomato, garden cress, parsley, dill), especially their oxidative stability. The were tested for oxidation degree (acid value, peroxide p-anisidine TOTOX indicator, specific extinction under ultraviolet light), colours, content carotenoid chlorophyll pigments, fatty acid compos...

Rapeseed contains high amounts of phenolic compounds, mainly derivatives of sinapic acid, but only a small part can be found in virgin rapeseed oil, since the polar compounds remain in the press cake. A temperature treatment of the raw material results in the degradation of sinapic acid to 2,6dimethoxy-4-vinylphenol (vinylsyringol or canolol), which is described in literature as a very strong a...

Abstract—Biodiesel is one of the alternative fuels that promising for substituting petro diesel as energy source which is advantage on sustainability and ecofriendly. Due to the raw material that tend to decompose during storage, biodiesel also have the same characteristic that tend to decompose and formed higher acid value which is the result of oxidation to double bond on a chain of ester. De...