Rice Protein Extraction Techniques

A method for producing high-purity rice protein powder and rice syrup in an environmentally friendly way that improves protein quality and reduces cost compared to conventional methods. The process involves combining physical extraction with enzymatic extraction. It starts with homogenizing rice slurry at low temperature and pressure. The homogenized slurry is centrifuged to separate rice starch and protein. The starch-rich supernatant is further centrifuged to get the rice syrup. The protein precipitate is washed, filtered, and dried to get the high-purity rice protein powder. The wash water and filtrate are recycled to minimize waste.

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Extracting black rice bran protein with improved yield, purity, and color compared to existing methods. The extraction process involves enzymatic digestion, alkaline extraction, and hydrogen peroxide decolorization. The enzymatic step breaks down polysaccharides and anti-nutritional factors to release more protein. The alkaline step changes the protein charge to enhance solubility. The hydrogen peroxide step removes pigments for purer protein.

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A novel method for preparing low GI artificial rice that combines rice protein extraction with a novel rice protein blend. The method utilizes a specific rice protein extract that is prepared through a novel enzymatic process that enhances protein solubility and bioavailability. The extracted protein is then blended with a proprietary rice blend that combines traditional rice flour with a specially formulated rice protein concentrate. The resulting blend is then extruded into low GI artificial rice that maintains the characteristic texture and nutritional profile of traditional rice while addressing concerns related to protein content and texture.

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An optimized method for extracting and purifying yellow rice protein. The method involves degreasing the yellow rice flour, extracting the protein using an alkali-soluble acid precipitation, and further purifying the extract through gel column chromatography. The optimal conditions for each step are determined through experiments to maximize protein yield. This allows efficient extraction and purification of protein from yellow rice, which can be used as a nutritional supplement.

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Optimizing rice protein extraction through an enhanced alkali method that significantly increases protein yield. The method employs a controlled alkali treatment to enhance protein solubility, resulting in a higher protein recovery rate compared to conventional extraction methods. This approach enables the efficient extraction of rice protein from raw materials, reducing the environmental impact of wastewater treatment.

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Process to extract protein from rice grains with high yield and purity. The process involves treating the rice grains with alpha amylase to break down the starch, followed by alkaline protease to further hydrolyze the proteins. Then, ethanol and salt solutions are added to precipitate the protein, and finally, an alkali solution extracts the remaining protein. This multi-step process allows efficient extraction of protein from rice grains with improved solubility and purity compared to traditional methods.

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A method for making rice-based nutritional products from rice starch and rice protein through enzymatic hydrolysis. The process involves milling rice, preparing hydrated rice, mixing enzymes to form a starch-amylose complex, and then converting the complex into maltodextrin and protein fractions. The enzyme-treated rice is then processed through a combination of microfiltration and ultrafiltration membranes to separate the maltodextrin and protein fractions, followed by decanter separation to obtain the final product.

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A method for extracting rice protein from brown rice using alkaline extraction and salt precipitation. The method involves treating brown rice with an alkaline solution like sodium hydroxide to extract the protein, then precipitating the protein with salt like sodium chloride. This allows selective isolation of rice protein from the starch in brown rice. The extracted protein has improved solubility, emulsification, foaming, and gelation properties compared to conventional methods. The protein is also more concentrated and has higher water and oil retention.

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A green and efficient method for extracting and separating rice protein using a combined alkali and enzymatic extraction process. The method involves initially extracting rice protein using alkali at a low pH to partially hydrolyze the protein. Then, enzymes are added to further break down the protein into soluble peptides. This two-step process improves protein extraction efficiency compared to using alkali alone while avoiding the drawbacks of high alkali concentrations.

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A method to efficiently produce rice protein peptides with improved solubility, water retention, and foaming properties. The method involves super-fine grinding of rice residue protein after initial proteolysis to make it easier for enzymes to contact the substrate. This promotes proteolytic efficiency and taste during a second proteolysis step. The resulting rice protein peptides have improved properties for use in food, healthcare, beverages, cosmetics, etc.

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Extracting protein and starch from purple rice using fermentation with Lactobacillus paracasei. The method involves fermenting purple rice with Lactobacillus paracasei for 72-120 hours using sucrose as the carbon source and ammonium chloride as the nitrogen source. This results in high yields of both protein and starch from the rice. The fermentation conditions of temperature and time were optimized to maximize the extraction of protein and starch. The use of Lactobacillus paracasei and specific fermentation conditions allows efficient and selective extraction of protein and starch from purple rice without the need for harsh chemicals like alkali.

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Method for purifying high-purity black rice starch and soluble black rice protein from germinated black rice. The process involves using germinated black rice as a raw material and steps like micro-jetting, fermentation, enzymatic hydrolysis, cyclone washing, membrane filtration, and spray drying to separate and purify the starch and protein. This allows obtaining high-purity black rice starch with low protein content and soluble black rice protein rich in biologically active compounds like gamma-aminobutyric acid and flavonoids.

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A method to extract antioxidant protein from rice byproducts like rice dregs. The process involves soaking the rice dregs in water to extract the protein, then separating the protein through centrifugation and drying it to obtain high-purity rice protein powder. This allows utilization of low-protein rice byproducts like rice dregs to produce protein-rich rice protein powder with antioxidant properties.

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A method for efficiently extracting protein from broken rice that improves yield, reduces costs, and shortens extraction time compared to traditional methods. The process involves pulverizing, soaking, and preparing crude protein from broken rice to maximize protein extraction and reduce impurities. This allows more complete protein extraction from broken rice compared to conventional methods.

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A novel method for extracting high-quality rice protein through a multi-step process that leverages the unique properties of rice residue. The process involves adding water to rice dregs, adjusting the pH to optimize protein extraction, followed by centrifugation to separate the protein solution. The resulting protein solution is then treated with acid to adjust its isoelectric point, allowing precipitation of the protein. The precipitate is then dried to produce rice protein, which retains its nutritional value and functional properties.

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A method for rapid and efficient extraction of rice albumin from rice grains, followed by electrophoresis analysis to evaluate its quality. The extraction process involves grinding rice into flour, dissolving it in water, and then using centrifugation to separate the supernatant. The supernatant is then mixed with protein extracts and subjected to SDS-PAGE electrophoresis to separate and quantify the albumin protein. This approach enables the rapid identification of rice varieties with specific protein profiles, enabling early breeding selections for improved eating quality.

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Method to extract rice protein powder with higher protein content compared to traditional methods. The process involves soaking rice in a concentrated sodium hydroxide solution, followed by enzymatic and acid hydrolysis steps. The higher protein yield is achieved by using specific conditions during the initial rice slurry preparation step. The process involves soaking rice in a concentrated sodium hydroxide solution, followed by enzymatic and acid hydrolysis steps. The higher protein yield is achieved by using specific conditions during the initial rice slurry preparation step.

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A method for extracting high-quality rice protein powder from rice residue using a novel enzymatic pretreatment process. The method employs a specific combination of enzymatic hydrolysis and acid treatment to break down the complex glutenin and globulin structures in rice, followed by membrane filtration to separate the resulting peptide-rich protein. This enzymatic pretreatment step enables the efficient extraction of high-quality rice protein without the need for complex and costly protein extraction technologies.

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High-purity enzymolysis of rice protein through a multi-step process that improves protein quality and solubility. The process involves ultrafine pulverization of broken rice, acid-mediated deamidation to produce a crude protein, high-pressure treatment to enhance protein solubility, and complex enzyme treatment to further purify the protein. This multi-step approach addresses the limitations of traditional enzymolysis methods by addressing both protein quality and solubility issues.

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Rapid extraction of rice protein powder using vacuum negative pressure and rotary evaporation. The process involves rapidly precipitating rice protein from broken rice flour using negative pressure instead of soaking. This prevents deterioration due to heat or time. The slurry is then concentrated using rotary evaporation to extract the protein powder quickly. The process provides high protein purity and yield without environmental pollution.

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