51results about How to "Retain physiological activity" patented technology

The invention relates to a method for extracting moringa oleifera lam flavone from moringa oleifera lam leaves. The method comprises the steps: 1) drying the moringa oleifera lam leaves, loading into a filter basket, putting into a sub-critical extraction kettle, and closing airtightly the extraction kettle; then adding an organic extraction agent, heating up until an extracted liquid in the sub-critical extraction kettle is in a sub-critical state; and extracting to obtain the extracted liquid, putting into a solvent recycling kettle, carrying out reduced-pressure recycling of the solvent, and thus obtaining a black green extract; 2) adding n-butanol saturated by water into the extract, and extracting; centrifuging by using a centrifuge, and collecting the extracted phase; and carrying out reduced-pressure concentration of the extracted phase by a rotary evaporator to obtain a brown-yellow extract; and 3) loading the brown-yellow extract on a macroporous resin column, then carrying out gradient elution with elution liquids according to an order from small elution liquid polarity to large elution liquid polarity, detecting, taking a fraction having the flavone content of more than 97%, concentrating to a dried powder, recrystallizing with methanol or ethanol, and thus obtaining a flavone product with the purity of more than 98%. The product has less impurity content and high biological activity, and the sub-critical fluid extraction technology has the advantages of high extraction efficiency, short operating period, energy saving, time saving, and high recovery rate of the extraction agent.

The invention discloses kudzuvine root fine dried noodles and a production method thereof. The production method is characterized in that the kudzuvine root fine dried noodles with the fresh scent of kudzuvine root are produced by using 100 weight parts of strong and fine flour and 20 to 40 weight parts of kudzuvine root powder as raw materials and adding 20 to 25 weight parts of kudzuvine root extract during dough making and by processes such as dough making, curing, tableting, strip cutting, drying, packaging and the like. Physiological active ingredients such as flavonoids compounds are contained in the noodles, so the kudzuvine root fine dried noodles have nutritional and health-care functions.

The invention provides an alkaloid-free / low-alkaloid betel nut and a preparation method thereof. The alkaloid-free / low-alkaloid areca nut is obtained by soaking the betel nut in lye containing a surfactant. The content of arecoline in the areca nut is Below 0.02wt%. The invention can fully leach arecoline which is a carcinogenic threat in the betel nut by combining the lye with the surfactant, and simultaneously effectively remove the pigment and pesticide residues. The trace elements, tannins and polyphenols that are beneficial to the human body are retained and are not affected, and its physiological activity and unique flavor are still retained. The method has the advantages of simple process, ingenious design, strong operability, no pollution, large raw material handling capacity and low production cost, and is suitable for industrialized production.

The invention discloses a method for extracting and separating procyanidine of hawthorn fruit through low-temperature aqueous two-phase cooling. The method comprises steps as follows: after fresh hawthorn fruit is washed, 30-70 mL of citric acid solutions, 30-70 mL of sodium chloride solutions and 30-70 mL of isopropyl alcohol are added to every 10 g of hawthorn fruit, the mixture is cooled to subzero 18 DEG C in a freezer, taken out and subjected to homogenization treatment for three times by a homogenizer, homogenization treatment is performed for 1-3 min every time, a product is left to stand for 5-15 min, an isopropyl alcohol top phase is separated after complete phase separation, obtained isopropyl alcohol is collected, subjected to vacuum distillation through a rotary evaporator and removed through evaporation, 1-4 ml of ethanol is added, solids are precipitated, the obtained solids are subjected to vacuum drying at the temperature of 20-35 DEG C until the solids are dried, and a procyanidine extract of the hawthorn fruit is obtained. By means of the method, the variety of reagents is reduced, and non-toxic, degradable, green and environment-friendly properties are realized; a homogenizing technology is introduced to the extraction process, mass transfer is effectively improved, the extraction time is greatly shortened, and the purity of the obtained procyanidine of the hawthorn fruit is higher.