Red grape pomace contains many secondary metabolites including anthocyanins and phenolic acids which significantly contribute to its antioxidant capacity. Herein, anthocyanins were extracted from grape pomace by using supercritical carbon dioxide. Ethyl alcohol was used as cosolvent. The temperature and pressure were kept constant during the extraction (95°C and 100 bar). The total extraction time was 180 min. The total monomeric anthocyanin content (TMAC) and total antioxidant capacity (TAC) were analyzed by taking samples from the extract at the 30th, 60th, 90th, 120th, 150th, and 180th min. The TMAC of grape pomace is 1,932.1 mg/kg dry matter. The TMAC and TAC values at each time intervals were calculated to be 579.2,
VARIOUS REMOVAL METHODS OF SOME PESTICIDE RESIDUES IN FRUITS AND VEGETABLESPesticides are mixtures of substances or substances that are used to maintain the vital activities of living things and to protect the nutrients they need from their production stage to their consumption.Pesticides, which are divided into three groups according to their mechanism of action, as contact, systemic and semi-systemic effect, are widely used in plants. The unconscious use of these pesticides causes the residue. These residues should be removed or destroyed. The method should be determined according to the product type and the mechanism of action (systemic-contact) in order to remove the residues. Washing with solutions such as tap water, chlorine dioxide solution and peroxyacetic acid solutions, heat treatment application, ozone, ultrasonic, pulsed electric field, high hydrostatic pressure and gamma radiation applications are among the processes that can be applied with the aim of removing or reducing residues.
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