Black rice

About: Black rice is a research topic. Over the lifetime, 2548 publications have been published within this topic receiving 20840 citations. The topic is also known as: purple rice.

Natural five-color fat-reducing dietic medicinal tea steamed bread and preparation method

Abstract: The invention provides natural five-color fat-reducing dietic medicinal tea steamed bread and a preparation method, and belongs to the technical field of health-care food processing. The method prepares herba rhodiolae, hawkthorn, longan flesh, medlar, Chinese magnoliavine fruit, American ginseng, codonopsis root, membranaceus, polygonatum root, angelica, liquorice, pueraria root, glossy ganoderma, honeysuckle flowers, chrysanthemum, atractylodes, yam, poria, polygonatum, fiveleaf gynostemma herb, aloe, mulberry leaves, lotus leaves, ginkgo leaves, green tea, balsam pear, ilex, cactus, dark plum fruit, polygonum, rehmannia root, cassia seeds, flour, red beans, red sorghum, red glutinous rice, coix seeds, oat, soybean, yellow maize, millet, chestnut, white lablab seeds, white maize, rice flour, mung bean, pea, spirulina, black bean, black rice, buckwheat, sweet potato flour, black sesame, eggs, milk, vegetable oil, stevioside, yeast, salt, fluffy soda, five-color fat-reducing dietic Chinese medicinal tea, residue and water into the natural five-color fat-reducing dietic medicinal tea steamed bread, steamed roll, bread or pancakes with good taste and smell and balanced nutrition according to conventional procedure.

Kinetics and thermodynamics of water adsorption onto rice husks ash filled polypropene composites during soaking

Abstract: The kinetics and thermodynamics of water adsorption onto rice husks ash filled polypropene composites during soaking were studied at different temperatures, quantities and nature of fillers. Raw rice husk, “white” and “black” rice husks ash and Aerosil were used as fillers of polypropene. The increase of fillers contents in the polymer matrix was found to result in non-linear increase of the amount of adsorbed water. The highest adsorption capacity showed the samples filled with raw rice husks, while the lowest—those filled with black rice husks ash. The adsorption kinetics was limited by intra-particle diffusion in plane sheet particles. The values of the diffusion coefficients D, diffusion constants D o, activation energy of the diffusion process Е а, changes of free energy ΔG ≠, enthalpy ΔH ≠ and entropy ΔS ≠ for the formation of the activated complex from the reagent were calculated. A compensation effect between D o and Е а was observed. Based on the Van’t Hoff equation, the values of the changes of standard free energy ΔG o, enthalpy ΔH o and entropy ΔS o of water adsorption were calculated. The sorption process is exothermal in nature and accompanied with decrease of the entropy. The values of the sorption coefficient S and permeability coefficient P were calculated at 25 and 90 °C.

Ameliorative effect of black rice anthocyanin on senescent mice induced by D-galactose

Abstract: This study investigated the ameliorative effect of black rice anthocyanin (BACN) in senescent mice induced by D-galactose. The male mice were randomly divided into five groups, namely, the normal group, the model group and dosage groups (15, 30 and 60 mg kg−1 of BACN). The model group and three dosage groups were continuously injected subcutaneously with D-galactose. The results suggested that superoxide dismutase (SOD) and catalase (CAT) were significantly increased upon black rice anthocyanin treatment, while MDA and the activity of monoamine oxidase (MAO) significantly decreased. The expressions of superoxide dismutase genes (SOD1 and SOD2) in liver were up-regulated in black rice anthocyanin group, while the expression of the MAO-B gene was down-regulated. These findings demonstrated that the ameliorative effect of BACN might be achieved partly by altering endogenous antioxidant enzymatic and aging-related enzymatic activities and regulating SOD1, SOD2 and MAO-B gene expressions.

Research Articles : Cholesterol-Lowering Efficacy of Unrefined Bran Oil from the Pigmented Black Rice (Oryza sativa L cv. Suwon 415) in Hypercholesterolemic Rats

Abstract: The effects of dietary supplementation of the unrefined rice bran oil from ``Suwon 415`` pigmented black rice (BRBO) on cholesterol metabolism and cellular antioxidant status were investigated in hypercholesterolemic rats. The significant reduction of total cholesterol (TC) and low density lipoprotein cholesterol (LDL-C) concentrations was observed in the plasma of rats fed BRBO. BRBO also decreased plasma and hepatic oxidative stress as a result of increased levels of hepatic thiobarbituric acid reactive substances (TBARS) levels associated with the elevations of hepatic superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GSH-Px) activities together with increased plasma level of tocopherol. This study indicates that dietary BRBO supplement can leads to the improvement of overall cholesterol metabolism and antioxidant status even more effectively than ``Chuchung`` white rice (WRBO). Consumption of BRBO may also protect the liver from oxidative damage caused by lipid peroxidation.

Simultaneous determination of 15 phenolic constituents of Chinese black rice wine by HPLC-MS/MS with SPE.

Abstract: UNLABELLED This study established a new method for quantitative and qualitative determination of certain components in black rice wine, a traditional Chinese brewed wine. Specifically, we combined solid-phase extraction and high-performance liquid chromatography (HPLC) with triple quadrupole mass spectrometry (MS/MS) to determine 8 phenolic acids, 3 flavonols, and 4 anthocyanins in black rice wine. First, we clean samples with OASIS HLB cartridges and optimized extraction parameters. Next, we performed separation on a SHIM-PACK XR-ODS column (I.D. 3.0 mm × 75 mm, 2.2 μm particle size) with a gradient elution of 50% aqueous acetonitrile (V/V) and water, both containing 0.2% formic acid. We used multiple-reaction monitoring scanning for quantification, with switching electrospray ion source polarity between positive and negative modes in a single chromatographic run. We detected 15 phenolic compounds properly within 38 min under optimized conditions. Limits of detection ranged from 0.008 to 0.030 mg/L, and average recoveries ranged from 60.8 to 103.1% with relative standard deviation ≤8.6%. We validated the method and found it to be sensitive and reliable for quantifying phenolic compounds in rice wine matrices. PRACTICAL APPLICATION This study developed a new, reliable HPLC-MS/MS method for simultaneous determination of 15 bioactive components in black rice wine. This method was validated and found to be sensitive and reliable for quantifying phenolic compounds in rice wine.