Antioxidative and free radical scavenging properties of rosemary extract

1997-01-01
Basaga, H
Öztekin, Ceren
Acikel, F
Autoxidation of corn and soybean oils was prevented in the presence of 0.1 g/kg rosemary (Rosemarinus officinalis L.) extract and butylated hydroxy toluene (BHT). At the end of a 4-d period, the peroxide value in corn oil reached 13.0 and 8.2 in the presence of rosemary extract and BHT respectively. For soybean oil, the peroxide value was found to be 10.0 and 6.6 in the presence of rosemary extract and BHT respectively Rosemary extract and BHT when added as mixtures of 75:25, 50:50 and 25:75 had a synergistic effect on preventing oxidation of soybean oil. Superoxide radicals (O-2(.-)) were generated by phenazine methosulphate-NADH system and rosemary extract was found to scavenge O-2(.-) in a concentration-dependent manner. The antioxidative effect observed is believed to be partly due to this radical scavenger activity. (C) 1997 Academic Press Limited.
FOOD SCIENCE AND TECHNOLOGY-LEBENSMITTEL-WISSENSCHAFT & TECHNOLOGIE

Suggestions

Hypochlorite inactivation kinetics of lactococcal bacteriophages
AVSAROGLU, M. Dilek; BUZRUL, Sencer; Alpas, Hami; AKÇELİK, Mustafa (Elsevier BV, 2007-01-01)
Ten heat-resistant lactococcal phages in M17 broth were inactivated by exposure to a range of different hypochlorite concentrations (2000-5000 mgl(-1)). Deviations from first-order kinetics as sigmoidal shapes were observed in the survival curves of all bacteriophages. Therefore, an empirical model with four parameters was used to describe hypochlorite inactivation. The model provided good fit for all phages; however, it was observed that there was a high correlation between the parameters of this model. Th...
Organic acid profile of Turkish white grapes and grape juices
Soyer, Yeşim; Karadeniz, F (Elsevier BV, 2003-10-01)
Organic acid compositions of 11 different white grape cultivars and grape juices were determined by high-pressure liquid chromatography (HPLC). The ranges of acid concentrations found in grapes were as follows: citric, 30-164 mg/l; tartaric, 4.98-7.48 g/l and malic, 1.43-3.40 g/l. Also the ranges of acid concentrations found in grape juices were as follows: citric, 31-181 mg/l, tartaric, 4.07-4.92 g/l and malic, 1.36-3.47 g/l. Tartaric acid was the major acid in every grape variety analyzed. Grape juices ha...
Inhibition of mackerel (Scomber scombrus) muscle lipoxygenase by green tea polyphenols
Banerjee, Sreeparna (Elsevier BV, 2006-01-01)
The high polyunsaturated fatty acid content of oily fish such as mackerel (Scomber scombrus) makes it particularly susceptible to oxidative degradation. We have shown previously the presence of lipoxygenase (LOX), a lipid oxygenase, in mackerel muscle. In the current study, commercially available green tea polyphenols were shown to effectively inhibit the LOX activity of mackerel muscle. EGCG (epigallocatechin gallate) was the strongest inhibitor tested with an IC50 (concentration for half maximal inhibitio...
Application of novel Fe3O4-g-GO-g-RAFT agent nanoabsorbents for D-SPME of biogenic amines in smoked fish
Molaei, Rahim; Tajik, Hossein; Moradi, Mehran; Forough, Mehrdad (Elsevier BV, 2020-04-01)
Herein, a dispersive solid phase microextraction (D-SPME) approach based on magnetic nanoabsorbents was developed for the simultaneous extraction of histamine, cadaverine, putrescine, and tyramine in smoked fish. The desired magnetic nanocomposite was prepared with surface modification of Fe3O4 nanoparticles with graphene oxide via surface reversible addition fragmentation chain transfer (RAFT) copolymerization. Preparation, size, morphology, surface functional groups and magnetic properties of as-synthesiz...
Thermal and chemical inactivation of lactococcal bacteriophages
BUZRUL, Sencer; OZTURK, Pinar; Alpas, Hami; AKÇELİK, Mustafa (Elsevier BV, 2007-01-01)
Ten lactococcal bacteriophages in M 17 broth were treated by heat (72 degrees C, 15 min and 90 degrees C, 5 min), ethanol and isopropanol at concentrations of 10%, 50%. 75% and 100% (v/v). The heat treatments were not sufficient to inactivate all the bacteriophages studied whereas ethanol, which was also more efficient biocide than isopropanol, at a concentration of 75% could inactivate all the phages in I min. The 50% and 75% of ethanol were more effective than 100%, which was also observed for isopropanol...
Citation Formats
H. Basaga, C. Öztekin, and F. Acikel, “Antioxidative and free radical scavenging properties of rosemary extract,” FOOD SCIENCE AND TECHNOLOGY-LEBENSMITTEL-WISSENSCHAFT & TECHNOLOGIE, pp. 105–108, 1997, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/38521.