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Showing 1 to 20 of 34 for “"Free radical scavenging"”.
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Relationship of free radical scavenging enzymes to fruit growth, development, ripening, and senescence in 'Red Delicious' apples
Changes in free radical scavenging (antioxidant) enzymes:superoxide dismutase (SOD; EC 1.1.15.1.1), catalase (EC 1.11.1.6), peroxidase (POD; EC 1.11.1.7)activities and polyphenol oxidizing enzyme:polyphenol oxidase (PPO; EC 1.14.18.1) activity were investigated during different stages of fruit bud …
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Evaluation of the antioxidant and anti-diabesity potential of cyclopia maculata using in vitro non-cell based screening models
… capacity (TAC) was assessed in terms of free radical scavenging and iron reducing ability. The DPPH, ABTS, ORAC and FRAP assays were employed. Anti-diabesity potential was assessed in terms of the inhibition of the digestive enzymes, α-glucosidase and pancreatic lipase
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Flavone: the Molecular and Mechanistic Study of How a Simple Flavonoid Protects DNA from Oxidative Damage.
… diseases. Flavonoid mechanics involve free radical scavenging, metal chelation, and substrate association. The skeletal structure of flavonoids is a fused ring system modified by hydroxyl, sugar, and carbohydrate additions. Flavone is a structurally simple flavonoid. Quercetin and its …
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STUDIES ON THE EFFECTS OF SOME FLAVONOIDS ON DNA TRANSCRIPTION AND CLONING OF LIPOAMIDE DEHYDROGENASE GENE
… a carbonyl group at C4 positon together with a free hydroxyl group at c4 position appeared to be important for the inhibition of transcription. Possibility of DNA degradation by flavonoids was raised. However, incubation of DNA in the presence of 0.5 mM and 1 mM of quercetin, rutin or …
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Antioxidant responses of pea (Pisum sativum L.) protoplasts
… application. A mechanism, unrelated to oxygen free radical scavenging, may contribute to the relative tolerance to low concentrations of paraquat. On the other hand, after an eight-hour exposure to 0.1 mM PQ in the presence of Gamborg’s basal salts, superoxide dismutase activity of Progress …
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Metal Complex Photo-activators for the Time-Controlled, Photo-Oxidation of Polyolefins
… disulphides in the presence and absence of free radical and peroxide initiators, free radical inhibitors, and different bases, in inert and oxidisable substrates, are investigated by oxygen absorption techniques, peroxide decomposition studies, and by product analysis. It is shown that the …
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Biological activity of Sinularia notanda
… including soft coral are routinely screened for free radical scavenging ability and the DPPH assay is one of the fastest methods to do so. Free radicals are known to induce oxidative damage to biomolecules which can eventually lead to diseases such as cancer. Oxidative damage can also be caused …
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Quantification of Total Phenolic Content and Antioxidant Activity of Oat Cultivars Grown in South Dakota
… for oat samples. Antioxidant activity, the free radical scavenging effect of oat extracts, was measured using the 1, 1 diphenyl 2 picrylhydrazyl (DPPH) assay. Pure standards (tannic acid, quercetin, 5- hydroxyanthranillic acid, caffeic acid, ferulic acid, p-coumaric acid, and sinapic acid) …
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Interactions between skimmed bovine milk and tea infusions under an acidulous environment: a thesis submitted in partial fulfilment of the requirements for the Degree of Doctor of Philosophy at Lincoln University
… phenolic content (TPC) by Folin-Ciocalteu assay, free radical scavenging ability by DPPH assay along with ABTS assay and FRAP assay. The cellular antioxidant activity and anti-proliferative activity were conducted on HepG2 cell lines. The microstructure of the ADGs was observed using different …
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Broccoli Components as Antioxidants: The Role of Isothiocyanates as Redox Modifiers via Glutathiolation
… that measure reactive oxygen species (ROS) scavenging. However, the relationship between chemical antioxidant assays and cellular measures of antioxidation has yet to be fully evaluated. Broccoli contains another group of dietary bioactive compounds, isothiocyanates, which do not have free …
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Characterisation and Screening of secondary metabolites from Commiphora viminea (Burtt Davy, Burseraceae) Engl. for antifungal properties against Candida auris
… using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging assay, demonstrated that all plant parts exhibited varying degrees of free radical scavenging capacity. The root and leaf water extracts exhibited the highest antioxidant activity, attributed to the presence of polar phenolics and …
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Analysis of Minocycline as a Radioprotectant
… tetracycline derivative, has anti-inflammatory, free radical scavenging, anti-apoptotic and antiangiogenic properties with exceptional penetration into the CNS. These qualities make it a viable candidate for use in combination with radiotherapy for CNS tumors as a normal tissue radioprotectant …
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Process development for the extraction of bioactive compounds from endemic South African mushrooms
… ecology. Hydro-ethanolic extraction of the freeze-dried fermentation biomass and H. ophelieae fruiting bodies yielded 7–26% crude extract (w/w), soluble in water and ethanol. Extracts exhibited selective anti-cancer activity against MDA-MB-231 breast cancer without cytotoxicity to MCF-12A …
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Protection of Pifithrin-α and Melatonin against Doxorubicin-Induced Cardiotoxicity.
… cardiac function, presumably due to its lack of free radical-scavenging activity. Finally, neither melatonin nor 6-hydroxymelatonin compromised the anti-tumor activity of doxorubicin in cultured PC-3 cells. These studies suggest that pifithrin-α and melatonin have significant therapeutic …
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The potential of the superoxide dismutase inhibitor, diethyldithiocarbamate as an adjuvant to radiotherapy
… itself, but due to the production of oxygen radicals. One of these potentially toxic radicals, superoxide (O₂⁻) can be generated as a result of ionizing radiation, and if not adequately removed can proceed to cause cell damage. Superoxide dismutase (SOD) is one of the key enzymes involved in …
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Cytotoxic compounds from the genus Centaurea.
… (lC50=3.8 x 10-3 mg/mL) exhibited significant free radical scavenging activities towards DPPH assay.
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Antimalarial activity of hypoxis colchicifolia, bak, mimusops caffra, E. Mey. ex A.DC and mimusops obtusifolia, lam from South Africa
… various antioxidant activities tested include free radical scavenging, Fe2+ chelating, reducing power, and total antioxidant capacity. Yeast induced pyrexia was used to evaluate the antipyretic activity of the plant extracts. In vitro antimalarial activity of the extracts was investigated …
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The Application of Melatonin and Platelet-Rich Plasma in the Development of a Bioactive Calcium Aluminate Bone Regenerative Scaffold
… through receptor-dependent signaling and free radical scavenging activity, respectively. Thus, it was hypothesized that melatonin and/or PRP would provide osteoinductive properties to CA scaffolds to promote bone regeneration in a rodent model of critical-size calvaria defects. Modified CA …
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Investigation of the effects of chinese herb medicine on TNF-[alpha] induced apoptosis in Huvec and Jurkat cells and their antioxidative effects
… protection may be addressed in part to a direct free radical scavenging effect of antioxidants dissolved in the EC membrane. From a methodological point of view, the Elias-c in combination with appropriate cell types and experimental designs can be seen as a cellular bioassays to test herbal …
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Cytotoxic, anti-inflammatory, antibacterial and anti-HIV effects of tabernaemontana elegans leaves and fractions
… The crude extracts and all fractions displayed a free radical scavenging activity, wherein FM3 showed a profound free radical activity. For antibacterial activity, the lowest MIC noted was 0. 625 mg/mL from the crude extracts and fractions against S. aureus, S. pyogenes, E. coli and P. aeruginosa. …
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