Antioxidative properties of xanthan on the autoxidation of soybean oil in cyclodextrin emulsion

Shimada, Kaoru; Fujikawa, Kuniko.; Yahara, Keiko.; Nakamura, Takashi

doi:10.1021/jf00018a005

Cited by 2,800 publications

(1,589 citation statements)

References 17 publications

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“…Under the same time and temperature conditions, the solvent used and the chemical property of sample are the most important factors [34] . The traditional healers or practitioners make use of water primarily as a solvent but there are many reports where organic solvents showed better activity as compared with aqueous extracts [35,36] .…”

Section: Discussionmentioning

confidence: 99%

Assessment of effect of hydroalcoholic and decoction methods on extraction of antioxidants from selected Indian medicinal plants

Kaneria

Kanani

Chanda

2012

Asian Pacific Journal of Tropical Biomedicine

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Section: Discussionmentioning

confidence: 99%

Assessment of effect of hydroalcoholic and decoction methods on extraction of antioxidants from selected Indian medicinal plants

Kaneria

Kanani

Chanda

2012

Asian Pacific Journal of Tropical Biomedicine

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“…With continuous shaking, reaction mixtures were incubated at 50°C for 20 min. After 20 min incubation, 2-3 drops of trichloroacetic acid were added to the reaction mixture and centrifuged at 10009g for 15 min (Shimada et al 1992). The supernatant layer of the mixture was collected and 2.5 ml of distilled water and FeCl 3 (0.5 ml) were added to this mixture.…”

Section: Reducing Powermentioning

confidence: 99%

Flavonoids from Heliotropium subulatum exudate and their evaluation for antioxidant, antineoplastic and cytotoxic activities II

2016

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The flavonoids are the largest group of phenolic compounds isolated from a wide range of higher plants. These compounds work as antimicrobials, anti-insect agents and protect plants from other types of biotic and abiotic stresses. Various researchers have suggested that flavonoids possessed antioxidant, antineoplastic and cytotoxic activities. The main objective of this study was to test dichloromethane fraction of resinous exudate of Heliotropium subulatum for their antioxidant, antineoplastic and cytotoxic activities, as well as to search new antioxidant and antineoplastic agents for pharmaceutical formulations. Five flavonoids were isolated from resinous exudate of this plant species and screened for their in vitro and in vivo antioxidant models (DPPH radical scavenging, reducing power, superoxide anion scavenging, metal chelating scavenging systems, catalase and lipid peroxidation), antineoplastic (Sarcoma 180), and cytotoxic (Chinese hamster V79 cells) activities. Tricetin demonstrated maximum antioxidant activity against both in vitro and in vivo experimental systems while galangin exhibited maximum inhibition (78.35%) at a dose of 10 lg/kg/day against Sarcoma 180. Similarly, it was found that galangin also showed highest activity (21.1 ± 0.15%) at a concentration of 70 lg/ml to Chinese hamster V79 cells. The observed results suggest that tricetin has a potential to scavenge free radicals in both in vitro and in vivo models while the galangin could be considered as antitumor and cytotoxic agent.

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“…Extract using water as the extraction solvent showed the lowest DPPH radical scavenging activity (P<0.05), while those extracted using hot water and 80 % ethanol showed the similar DPPH radical scavenging activity (P>0.05). DPPH is used as a free radical to evaluate antioxidative activity of some natural compounds and the degree of colour changes is attributed to hydrogen donating ability of test compounds, which is indicative of their scavenging potential (Shimada et al 1992). Compound in the ethanolic extracts might have the appropriate polarity or hydrophilic-hydrophobic balance, which could localise close to DPPH radicals, in which hydrogen could be donated to DPPH radicals easily.…”

Section: Antioxidative Activitiesmentioning

confidence: 99%

Antioxidant activities of lead (Leucaena leucocephala) seed as affected by extraction solvent, prior dechlorophyllisation and drying methods

et al. 2012

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Extracts of brown lead (Leucaena leucocephala) seed prepared using different extraction solvents were determined for antioxidative activities using different assays. The highest yield (3.4-4.0%) was obtained when water was used as an extraction solvent, compared with all ethanolic extracts used (1.2-2.0 %) (P<0.05). Much lower chlorophyll content was found in the water extract. When hot water was used, the resulting extract contained lower total phenolic and mimosine contents (P<0.05). In general, 60-80 % ethanolic extracts had higher 2,2-diphenyl-1-picrylhydrazyl (DPPH), 2,2-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical scavenging activities, ferric reducing antioxidant power (FRAP) and metal chelating activity than water extracts (P<0.05). When brown lead seed was dechlorophyllised prior to extraction, the water extract had slightly increased yield with lower chlorophyll content. Nevertheless, prior chlorophyll removal resulted in the increase in antioxidative activities but lower total phenolic and mimosine contents (P<0.05). Generally, phenolic compounds and mimosine were more released when water was used as the extraction solvent, while the lower amount of chlorophyll was extracted. Oven-drying exhibited the negative effect on antioxidative activities and mimosine content. The higher antioxidative activities with concomitant higher total phenolic and mimosine contents were found in water extract dried by freeze drying. Thus, extraction solvent, dechlorophyllisation and drying methods directly influenced the yield and antioxidative activity of lead seed extract.

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Antioxidative properties of xanthan on the autoxidation of soybean oil in cyclodextrin emulsion

Cited by 2,800 publications

References 17 publications

Assessment of effect of hydroalcoholic and decoction methods on extraction of antioxidants from selected Indian medicinal plants

Assessment of effect of hydroalcoholic and decoction methods on extraction of antioxidants from selected Indian medicinal plants

Flavonoids from Heliotropium subulatum exudate and their evaluation for antioxidant, antineoplastic and cytotoxic activities II

Antioxidant activities of lead (Leucaena leucocephala) seed as affected by extraction solvent, prior dechlorophyllisation and drying methods

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