• Title, Summary, Keyword: rice bran

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Rice Bran Application under Deep Flooding can Control Weed and Increase Grain Yield in Organic Rice Culture

  • Yan, Yong-Feng;Fu, Jin-Dong;Lee, Byun-Woo
    • Journal of Crop Science and Biotechnology
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    • v.10 no.2
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    • pp.79-85
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    • 2007
  • Rice bran application just after transplanting has been increasingly practiced as an herbicide-substitute for organic rice production in Korea. However, this practice is frequently reported to be unsatisfactory in weed suppression. An experiment with five treatments that combines flooding depth, rice bran application dose, and herbicide treatment was done in the paddy field to evaluate whether rice bran application under deep flooding can lead to a successful weed control in compensation for the single practice of rice bran application. Rice bran was broadcasted on the flood water surface just after deep flooding of 8 to 10cm that was started at seven days after transplanting. In the shallow flooding plot without herbicide six weed species were recorded: Monochoria vaginalis, Echinochloa crus-galli, Ludvigia prostrate, Cyperus amuricus, Aneima keisak, and Bidens tripartite. Among the first four dominant weed species, deep flooding significantly suppressed the occurrence of Echinochloa crus-galli and Cyperus amuricus while did not suppress the occurrence of Monochoria vaginalis and Ludwigia prostrate. On the contrary, rice bran application under deep flooding suppressed significantly Monochoria vaginalis and Ludwigia prostrate while didn't exert an additional suppression of Echinochloa crus-galli and Cyperus amuricus compared to deep flooding alone. Rice bran application and deep flooding suppressed complimentarily all the six weed species to a satisfactory extent except for Monochoria vaginalis of which suppression efficacy was 31.9%. Deep flooding reduced the panicle number substantially by inhibiting the tiller production, increased the spikelet number per panicle slightly, and leaded to a lower rice grain yield compared to shallow flooding with herbicide. Rice bran application under deep flooding mitigated the panicle reduction due to deep flooding, increased the spikelets per panicle significantly, and thus produced even higher grain yield in the rice bran application of 2000kg $ha^{-1}$ as compared to the shallow flooding treatment with herbicide. In conclusion, this practice applying rice bran under deep flooding would be promising to be incorporated as an integral practice for an organic rice farming system.

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Antioxidant Activities of Rice Bran Extracts for Wellness Convergence (융복합적인 웰리스를 위한 미강추출물의 항산화 활성)

  • Lee, Jae-Hyeok;Park, Jeong-Suk
    • Journal of Digital Convergence
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    • v.13 no.2
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    • pp.401-406
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    • 2015
  • The aim of present study is to investigate antioxidative effect of the Rice Bran Extracts and Defatted Rice Bran Extracts. Rice Bran Extracts used Rice Bran Water Extract, Rice Bran Ethanol Extract, Defatted Rice Bran Water Extract, Defatted Rice Bran Ethanol Extract. This study was carried out to examine quenching effects of Rice bran extracts on DPPH-, Riboflavin-, and Xanthin oxidase- originated superoxide activities. In addition, in order to determine whether Rice Bran Extract can be safely applied to human skin, the cytotoxic effects of Rice Bran Extract in Human Dermal Fibroblast cells were determined using MTS Assay. These results demonstrated that RBE and DRBE had anti-oxidative properties and did not induce the cytotoxic effects in Human Dermal Fibroblast cells. Therefore, these findings suggest that anti-oxidative properties of RBE and DRBE may be considered convergence with skin care.

EFFECTS OF HIGH BY-PRODUCT DIETS CONTAINING RICE BRAN AND BEET PULP ON THE SITE AND EXTENT OF DIGESTION AND MICROBIAL SYNTHESIS IN STEERS

  • Zhao, Y.;Taniguchi, K.;Obitsu, T.
    • Asian-Australasian Journal of Animal Sciences
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    • v.9 no.6
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    • pp.655-665
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    • 1996
  • The effects of feeding rice bran and beet pulp mixtures on the site and extent of digestion and microbial synthesis in fattening steers were studied. Three Holstein steers fitted with ruminal, duodenal and ileal cannulas were fed four diets in a $4{\times}3$ Youden square design. The four diets consisted of 15% Italian ryegrass hay and 85% concentrate as a control diet which included 72% rolled barley, 20% rice bran plus 40% beet pulp, 30% rice bran plus 30% beet pulp or 40% rice bran plus 20% beet pulp. All diets provided 1.8 times digestible energy required for maintenance. The digestibility of fat in the small intestine (% of flow) showed an increase with rice bran content among the by-product diets. Digestibility of structural carbohydrate both in the rumen and the whole digestive tract decreased linearly with rice bran content. The digestibility of nonstructural carbohydrate was not affected by rice bran content, but that of nonstructural, nonstarch polysaccharides was higher in the rumen and lower in the large intestine for the by-product diets than for the control diet. A rice bran content of more than 30% in the by-product diets severely inhibits ruminal microbial synthesis and digestible energy intake in fattening steers.

A Study on the Performance and Exhaust Emissions of Agricultural Diesel Engines by Use of Rice Bran Oil as a Fuel (미강유 연료에 의한 전용 디젤기관의 성능 및 비기 배출물에 관한 연구)

  • 하정호
    • Journal of Advanced Marine Engineering and Technology
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    • v.22 no.6
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    • pp.816-826
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    • 1998
  • The effects of rice bran oil on the characteristics of performance and exhaust emissions have been experimentally examined by a single cylinder four cycle direct injection water-cooled and agricultural diesel engine operating at several loads and speeds. The experiments are conducted with light oil blends of rice bran with light oil and rice bran oil as a fuel. The fuel injection timing if fixed to $22^{\circ}$ BTDC regardless of fuel type engine loads and speeds. Any oxygen is not included in light oil while the oxygen contents of 10.7% are included in rice bran oil. The lower calorific value of rice bran oil is less than light oil and the viscosity is very high compared with light oil. In pre-sent study it is found that these major differences of chemical and physical properties control the combustion parameters that affect the performance and exhaust emissions of diesel engines using a rice bran oil as fuels.

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Effects of Oleic Acid on the Autoxidation of Rice Bran Oil (미강유의 자동산화에 미치는 Oleic Acid의 첨가 효과)

  • 이성호;신영순
    • The Korean Journal of Food And Nutrition
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    • v.6 no.1
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    • pp.47-52
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    • 1993
  • In the present study, an attempt was made to investigate the effect of oleic acid on the autoxidation of the commercial rice bran oil. Rice bran oil samples with oleic acid at 0.1, 0.3 and 0.5% level were kept at 45 $\pm$ 0.3$^{\circ}C$ for 40 days. The rate of autoxidation of each samples was estimated regularly on the basis of the changes of peroxide value, acid value, anisidine value and the fatty acid composition. The per oxide, acid and anisidine values of the rice bran oil with the oleic acid increased as compared with that of the rice bran oil without the oleic acid during the autoxidation. The induction period of the rice bran oil without the oleic acid, control was 19.8 days, while those of the rice bran oil with oleic acid at 0.1, 0.3 and 0.5% levels were 18.3 days, 16.8 days, and 15.5 days, respectively. In conclusion, it seemed that oleic acid acted as weak prooxidant when added at 0.1, 0.3 and 0.5% levels to the commercial rice bran oil.

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Production of $\beta$-Carotene-Enriched Rice Bran Using Solid-State Fermentation of Rhodotorula glutinis

  • Roadjanakamolson, M.;Suntornsuk, W.
    • Journal of Microbiology and Biotechnology
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    • v.20 no.3
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    • pp.525-531
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    • 2010
  • This work was aimed at utilizing rice bran as a substrate for $\beta$-carotene production by Rhodotorula glutinis DM 28 under optimized conditions of solid-state fermentation. The biomass and $\beta$-carotene content of Rhodotorula glutinis DM 28 grown on rice bran as a sole substrate under solid-state fermentation were 54 g/kg rice bran and 1.65 mg/kg rice bran, respectively. Its biomass and $\beta$-carotene content, however, could be improved by 60% and 30%, respectively, using the Central Composite Design for the optimization of its cultivation conditions. The optimized conditions obtained were a pH of 5, a moisture content of 70% (w/w), and a carbon-to-nitrogen ratio of 4. Under these conditions, rice bran containing R. glutinis DM 28 had nutritional values of $\beta$-carotene, protein, and fat higher than those of rice bran alone. Yeast-grown rice bran could be suitable, therefore, to use as a $\beta$-carotene-enriched supplement in animal feeds.

Quality Properties of Kochujang Added Defatted Rice Bran Powder During Storage (탈지미강을 첨가한 고추장의 저장 중 품질특성)

  • Jeon, Eun-Raye;Jung, Lan-Hee
    • Korean journal of food and cookery science
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    • v.27 no.4
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    • pp.89-98
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    • 2011
  • The physicochemical and sensory properties of kochujang added defatted rice bran powder were periodically examined during storage at 30$^{\circ}C$ for 45 days. The pH of kochujang added defatted rice bran powder increased gradually according to the added level, whereas pH decreased gradually during storage. But the acidity to be appeared opposite of pH. The L-, a and b-values of samples increased gradually according to the amount of added defatted rice bran powder, whereas they decreased gradually during storage. The salinity of samples decreased gradually according to the amount of added defatted rice bran powder and storage. Amino nitrogen content of kochujang added defatted rice bran powder was higher than that of the control during storage. Electron donating activities of kochujang added defatted rice bran powder increased gradually according to the amount added. As a result of the sensory evaluation, the 3% treatment was superior in color, aroma, and overall preference. The sensory evaluation revealed that adding 3% defatted rice bran powder was optimum for improving kochujang quality.

Adsorption Treatment of Petroleum Oil on Aqueous Phase (수용액중에 함유된 석유화합물들의 흡착처리에 관한 연구)

  • Lee, T.H.;Son, B.C.;Lee, S.B.;Kim, l.H.
    • Analytical Science and Technology
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    • v.5 no.1
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    • pp.1-5
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    • 1992
  • The adsorption amount of petroleum oil on XAD-4, XAD-7 and replacement adsorbents as rice bran, rice straw and sawdust were studied by using batch method measured in the optimum adsorption condition. The adsorption capacity of rice bran and rice straw of petroleum oil were excellent as well as adsorption ability about 50% of XAD resins and adsorption capacity of their replacement adsorbents were increased with optimum condition that pyrolysis time was 30 min. at $200^{\circ}C$. Adsorption ability of sawdust was very weak on the 30% MeOH aqueous medium but adsorption ability was range of about 50% of XAD resin's adsorption capacity on the 0.5M NaCl aqueous medium. Adsorption ability of rice bran and rice straw showed the same adsorption capacity even if difference external structure. Therefore, showing that rice bran and rice straw were have to good adsorption ability as replacement adsorbent for XAD resins.

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Physicochemical and Sensory Characterization of Korean Blood Sausage with Added Rice Bran Fiber

  • Choi, Yun-Sang;Choi, Ji-Hun;Han, Doo-Jeong;Kim, Hack-Youn;Lee, Mi-Ai;Kim, Hyun-Wook;Lee, Chi-Ho;Paik, Hyun-Dong;Kim, Cheon-Jei
    • Food Science of Animal Resources
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    • v.29 no.2
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    • pp.260-268
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    • 2009
  • This study was conducted to determine the effects of added rice bran fiber on the physicochemical and sensory characterization of blood sausage. Blood sausages were supplemented with rice bran fiber at levels of 0% (control), 1%, 2%, and 3%. The moisture, hardness, gumminess, and chewiness of treatments with added rice bran fiber were higher than those of controls (p<0.05). The pH, lightness, redness, and yellowness of uncooked as well as cooked blood sausages increased with increasing addition levels of rice bran fiber levels, but energy values were lower in blood sausage treatments with containing rice bran fiber than that of controls (p<0.05). As the increase levels of rice bran fiber in blood sausage the energy levels were decreased (p<0.05). All sensory scores of treatments containing rice bran fiber were higher than controls, and the highest overall acceptability was attained when 2% rice bran fiber was added to blood sausage. The blood sausage with 2% rice bran fiber can be manufactured with high quality characteristics.

Development of new food protein through chemical modification of rice bran proteins

  • Bae, Dongho;Jang, In Sook
    • Journal of Applied Biological Chemistry
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    • v.42 no.4
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    • pp.180-185
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    • 1999
  • Protein concentrate was produced and succinylated from rice bran to assess and improve its functional properties for the purpose of expanding the uses of rice bran proteins. The most effective solvent for the extraction of rice bran proteins was 20% aqueous ethanol at pH 9. The protein content of rice bran protein concentrate produced was 70.0% and the total protein yield was 64.3%. The extent of succinylation of free amino groups in the modified products was 72.8%. Though the modified protein products showed good functional properties including solubility, emulsion properties, and oil absorption capacity, it did not form gel. Succinylation improved solubility and emulsion and gelling properties. These improvements in functionality will enhance the value of rice bran proteins, thus enabling them to be more competitive with other food proteins.

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