Wild Rice Hull Antioxidants

Asamarai, A.M.; Addis, P. B.; Epley, Richard J.; Krick, Thomas P.

doi:10.1021/jf940651c

Cited by 92 publications

(53 citation statements)

References 5 publications

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“…Both M A and M B exhibited rather weak antioxidant activity as shown in Figure 5, so that the antioxidant activity of rice plants may be attributed to other substances such as various types of phenolic acids and phenols in rice rather than M A and M B . Some chemicals identified in rice such as isovitexin, anisole, vanillin, syringaldehyde, o-methoxycinnamic acid, 4,7-dihydroxybenzoic acid, and pcoumaric acid exerted antioxidant effect (Ramarathnam et al 1989, Asamarai et al 1996, Lee et al 2003. Of these, isovitexin was a potent antioxidant (Huang et al 2005).…”

Section: Discussionmentioning

confidence: 99%

Comparative efficaciesin vitroof antibacterial, fungicidal, antioxidant, and herbicidal activities of momilatones A and B

Fukuta¹,

Xuan²,

Deba³

et al. 2007

Journal of Plant Interactions

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Momilactones A (M A ) and B (M B ) are phytoalexins derived from rice plant (Oryza sativa) and were considered to be a part of the mechanism of rice self-defense system. The present study was to evaluate the comparative efficacies in vitro of antibacterial, fungicidal, antioxidant, and herbicidal activities of M A and M B . In general, M B shows higher antifungal, antibacterial, and herbicidal action than M A , although its antioxidant property was less than M A . In herbicidal trial, the IC 50 values of M B against germination, shoot and root elongation of barnyardgrass and monochoria were 40.9, 45.5, and 27.5, and 27.1, 17.3, and 0.9 mg, respectively. For M A , these values were 40.3, 35.6, and 55.1, and 43.9, 24.3, and 0.5 mg, respectively. For antifungal activity, momilactone B (IC 50 : 1.2, 123.9, and 53.4 mg) exerted significantly greater inhibition than M A (IC 50 : 78.1, 198.1, and 95.3 mg) against Botrytis cinerea, Fusarium solani, Colletrotrichum gloeosporioides, respectively, except for Fusarium oxysporum that both M A and M B showed no marked difference. In addition, M B exhibited significantly stronger antibacterial activity than M A against Pseudomonus ovalis, Bacillus cereus, and Bacillus pumilus, whereas the inhibitory activity of the two compounds was similar against Escherichia coli. Both M A and M B exerted rather weak antioxidant activity (EC 50 was 783.9 and 790.7 mg, respectively), of which M A showed a slightly stronger antioxidant activity than M B . This study is the first to examine antifungal, antibacterial, and antioxidant activities of two phytoalexins, as well as their comparative efficacies against growth of the noxious weeds barnyardgrass and monochoria.

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Section: Discussionmentioning

confidence: 99%

Comparative efficaciesin vitroof antibacterial, fungicidal, antioxidant, and herbicidal activities of momilatones A and B

Fukuta¹,

Xuan²,

Deba³

et al. 2007

Journal of Plant Interactions

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“…The outer layers of plants, including their peels, shells and husks, can protect the seeds from oxidative damage due to the large amounts of strong antioxidants present, such as flavonoids, hydrocinnamic acid derivatives, isovitexin, phytic acid, anisole, vanillin and syringaldehyde [48][49][50]. They are good sources of natural antioxidants.…”

Section: Antioxidant Properties Of Rice By-productsmentioning

confidence: 99%

By-products of Rice Processing: An Overview of Health Benefits and Applications

Esa¹,

Ling²

2016

J Rice Res

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Our study was centred on the increasing literature associated with rice by-products and main components, especially those intended to combat cancer, improve plasma lipid levels or control the blood glucose levels. Rice byproducts, such as rice straw, rice husks, rice bran, rice germ and broken rice, are extensively abundant agricultural wastes from the rice industry, and the percentage of their production depends on the milling rate and type of rice. Among all rice by-products, rice bran has been extensively studied.It contains phytochemicals such as γ-oryzanol, vitamin E, mainly tocotrienols and dietary fibre. This paper reviews the existing literature on the potential role of rice by-products, focusing not only on the role of rice bran but also on the roles of other rice by-products, such as rice germ and rice husk, in the management of the diseases, investigating their various potential uses in the food industry and all possible properties that may contribute to these effects.

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“…Synthetic antioxidants such as butylated hydroxytoluene (BHT), butylated hydroxyanisole (BHA) and propyl gallate (PG) have been used as food additives to inhibit the actions of toxic and carcinogenic substances (Chang et al, 1977). Natural antioxidants from natural foods such as herbs (Bracco et al, 1981;Inatani et al, 1982;Pizzocaro et al, 1994), vegetables (Tsushida et al, 1994;Vinson et al, 1998), fruits (Nogata et al, 1996;Wang et al, 1996), oilseeds Fukuda et al, 1985;Medina et al, 1999), spices Chipault et al, 1995;Kramer, 1995;Hettiarachchy et al, 1996), green tea (Amarowicz & Shahidi, 1996) and cereals (Asamari et al, 1996;Maillard et al, 1996;Hendelman et al, 1999) have been studied, and some of them, such as ascorbate and tocopherols, are currently used in a variety of food products. a-Tocopherol, a form of vitamin E, is widely used as a natural antioxidant.…”

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confidence: 99%

Antioxidative Activities of Citrus Peel Essential Oils and Their Components against Linoleic Acid Oxidation.

Song

Ukeda

Sawamura

2001

FSTR

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Antioxidative activities of thirty kinds of citrus essential oils and their fourteen components against linoleic acid oxidation were examined by a thiocyanate method. The tocopherol contents of these oils were determined by high-performance liquid chromatography monitored at 290 nm. All the citrus essential oils and the flavor components showed inhibitory effects against linoleic acid oxidation. Highest antioxidative ability was observed in the essential oils of yuzu, lemon, hassaku, sudachi, mochiyu, yuko and Tarocco orange. Antioxidative activities of ␤-pinene, myrcene, ␣-terpinene, ␥-terpinene and decanal were higher or similar to that of d d d d-tocopherol. Tocopherols were contained abundantly in the essential oils of limes, Valencia orange, yuzu and lemons. However, there was little correlation between tocopherol contents and antioxidative activities in citrus essential oils. The composition of terpene compounds seems to be a major factor in the antioxidative activities of these oils.

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Wild Rice Hull Antioxidants

Cited by 92 publications

References 5 publications

Comparative efficaciesin vitroof antibacterial, fungicidal, antioxidant, and herbicidal activities of momilatones A and B

Comparative efficaciesin vitroof antibacterial, fungicidal, antioxidant, and herbicidal activities of momilatones A and B

By-products of Rice Processing: An Overview of Health Benefits and Applications

Antioxidative Activities of Citrus Peel Essential Oils and Their Components against Linoleic Acid Oxidation.

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