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The kinetic behaviour of derivatives of benzoic and cinnamic acids, D-tocopherol, ascorbyl palmitate, flavonoids, coumarins, carnosol, thymol, carvacrol, resveratrol and carotenoids in lipid oxidation were studied. Most of the experiments were carried out with kinetically pure triacylglycerols or methyl esters of fatty acids. Some of the investigations were performed with fats and oils without purification in view to get information for the practice concerning the possibility for stabilization of real lipid systems. A new general parameter, activity A, for complex estimation of the effect of the antioxidants in lipids is proposed. It unifies the effectiveness of an inhibitor in termination of the autoxidation chain, on the one hand, and its ability to change the oxidation rate during the induction period, on the other. The analysis of the kinetic data obtained allowed the participation of the antioxidants in the side reactions of inhibited oxidation to be discussed. The extracts of different Bulgarian plant materials with solvents of various polarity were studied: leaves from Rosemary officinalis L., bark from Fraxinus ornus L., selected spieces of the family Lamiaceae, used as spices in Bulgaria, e.g. Melissa officinalis L., Mentha piperita L., Mentha spicata L., Ocimum basilicum L., Origanum vulgare L., and Saturejae hortensis L. Propolis, algae Scenedesmus acu-tus, Silibum marianum seed oil, Capsicum annum L. were also examined. The participation of carotenoids in the oxidation process differs from that of phenolic antioxidants. Our study on sunflower oil oxidation showed that in an antioxidant-free lipid system, the presence of carotenoids did not show any antioxidative protection, whereas in the presence of tocopherols and under light a synergism occurred.
LWT-Food Science and Technology
Antioxidative effect of extracts from red grape seed and peel on lipid oxidation in oils of sunflower2006 •
Journal of Agricultural and Food Chemistry
Antioxidant Activity of Phenolic Acids in Lipid Oxidation Catalyzed by Different Prooxidants2009 •
Antioxidant plays a very important role in the body defense system against Reactive Oxygen Species (ROS). The free radicals also play an important role in combustion, atmospheric chemistry, biochemistry and biotechnology including human physiology. Fats and oils are energy sources that are composed mostly of triacylglycerols. Lipid ptofile are risk indicators of coronary heart disease. Various types of lipoproteins exist, but the two most abundant are Low-density Lipoprotein (LDL) and High-density Lipoprotein (HDL). Lipid peroxidation is the introduction of a functional group containing two catenated oxygyen atomsinto unsturated fatty acids in a free radical reaction. Life in oxygen has led to the evolution of biochemical adaptations that exploit the reactivity of Active Oxygen Species (AOS). Antioxidant enzymes are an important protective mechanism ROS. This paper highlight the functions of antioxidants in the blood and selected organs associated with health.
Journal of the Science of Food and Agriculture
Effect of the phenol antioxidant type on the kinetics and mechanism of inhibited lipid oxidation in the presence of fatty alcohols1995 •
Journal of Medicinal Plants Research
Oxidative behaviour of four Malaysian edible plant extracts in model and food oil systems2012 •
Advance Journal of Food Science and …
Natural Antioxidants, Lipid Profile, Lipid Peroxidation, Antioxidant Enzymes of Different Vegetable OilsEuropean Food Research and Technology
Investigation of plant extracts for the protection of processed foods against lipid oxidation. Comparison of antioxidant assays based on radical scavenging, lipid oxidation and analysis of the principal antioxidant compounds2001 •
Antioxidant activities of plant extracts from spices, coffee, tea, grape skin, and tomato peel slurry were evaluated using a number of analytical methods including the quantification of principal compounds. Similar rankings in the activities of these extracts were obtained by evaluating their efficiencies as scavengers of stable free radicals: Fremy's salt, galvinoxyl or α,α-diphenyl-β-picrylhydrazyl (DPPH). Similar results were obtained with the lipid oxidation assays based on thermal acceleration (formation of conjugated dienes in methyl linoleate at 40 °C or the Rancimat test at 100 °C with lard). Rankings of the extract activity obtained by scavenging of hydroxyl radicals generated in the Fenton reaction were similar to those obtained by an oxygen consumption assay with linoleic acid as substrate and metmyoglobin as catalyst. However, the results of the latter two assays differed from those of the other assays. In the overall ranking, coffee and rosemary extracts were amongst the most potent extracts whereas the tomato peel slurry showed no activity.
Grasas Y Aceites
Antioxidant activity of various plant extracts under ambient and accelerated storage of sunflower oil2006 •
1995 •
Adult Education Critical Issues
Η συμμετοχή των μεταναστών σε Σχολεία Δεύτερης Ευκαιρίας, στην Περιφέρεια της Κεντρικής ΜακεδονίαςΟ σκοπός της παρούσας μελέτης ήταν να διερευνήσει τη συμμετοχή των μεταναστών στα Σχολεία Δεύτερης Ευκαιρίας (ΣΔΕ), εξετάζοντας τα κίνητρα συμμετοχής τους, τα πιθανά εμπόδια που συνάντησαν πριν εγγραφούν, και εκείνα που, ενδεχομένως, αντιμετωπίζουν αναφορικά με τη φοίτηση ή/και τη μαθησιακή διαδικασία, καθώς και τις αντιλήψεις αυτών για το μαθησιακό περιβάλλον του ΣΔΕ. Πραγματοποιήθηκαν 18 ημιδομημένες σε βάθος συνεντεύξεις με εκπαιδευόμενους μετανάστες από 4 Σχολεία Δεύτερης Ευκαιρίας στην Περιφέρεια της Κεντρικής Μακεδονίας. Τα ευρήματα υποδηλώνουν ότι οι συμμετέχοντες παρακινήθηκαν να εγγραφούν στο ΣΔΕ τόσο από εσωτερικά όσο και εξωτερικά κίνητρα, ενώ πλήθος εμποδίων, κυρίως καταστασιακά ή/και προδιαθετικά, παρακώλυσε την εγγραφή τους. Παρόμοια εμπόδια επίδρασαν στη φοίτηση και τη μαθησιακή διαδικασία αυτών, συνδυαστικά με εκείνα που ανέκυψαν λόγω της επιβεβλημένης εξ αποστάσεως λειτουργίας των ΣΔΕ για την ανάσχεση του κορωνοϊού. Ωστόσο, έχουν αναπτύξει θετική στάση απέναντι στο ...
isara solutions
आधुनिक हिन्दी कहानी की विकास यात्राSeminar dan Workshop Mek. Rekayasa T. Sipil, Universitas Atma Jaya Yogyakarta, hal. 43-49
METODE PEMBELAJARAN MEKANIKA BAHAN PADA APLIKASI KOMPONEN BETON BERTULANG2004 •
“Day one in Europe” European Erasmus+ Project
SOCIAL THEATRE: COMMUNITY THEATRE & THEATRE OF THE OPPRESSED2023 •
M. Sultan Leo Fayuda
M. Sultan Leofayuda (F1C121021) Laporan praktikum kimia koordinasi pembuatan Natrium thiosulfa2023 •
Miscelánea: A Journal of English and American Studies
La transferencia lingüística: perspectivas actuales, by Rosa Alonso Alonso2016 •
Cell Biology International
Opposite Effect of Linearly Polarized Light on Biosynthesis of INTERLEUKIN‐6 in a Human B Lymphoid Cell Line and Peripheral Human Monocytes2002 •
The Journal of Medicinal Plants and By-Products (JMPB)
Evaluating Antibacterial Effects of Alcoholic Extracts and Essential Oil of Althaea officinalis Against Two Types of Gram-positive and Gram-negative Bacteria (Bacillus cereus and Klebsiella pneumoniaMedical mycology case reports
Difficult diagnosis of invasive fungal infection predominantly involving the lower gastrointestinal tract in acute lymphoblastic leukaemia2016 •
Motrivivência
Revisão sistemática sobre práticas corporais na perspectiva das práticas integrativas e complementares em saúde2018 •
Journal of High Energy Physics
Jet mass and substructure of inclusive jets in √s = 7TeV pp collisions with the ATLAS experiment2012 •
Dinamika Kerajinan dan Batik: Majalah Ilmiah
Kertas Seni Berbahan Limbah Pewarna Alam Rumput Laut Jenis Sargassum, Ulva Dan Pelepah Pisang Abaka2016 •