31 results about "Oxygen radical absorbance capacity" patented technology

The present invention provides a topical formulation and method of use where the formulation comprises macqui berry or a macqui berry extract containing anthocyanins having a very high oxygen radical absorbance capacity (ORAC). The formulation provides the macqui berry in a stabilized form which includes a glucuronide or glycuronide, a photostabilizing agent, encapsulation, or light -and/or air-blocking packaging.

The invention relates to an extraction method for a Synsepalum dulcificum Denill tree branch and leaf extract. The extraction method comprises the following steps of: crushing Synsepalum dulcificum Denill tree branches and leaves to obtain an extracted raw material; adding ethanol water; performing reflux extraction for 2-5 hours; filtering; performing reduced pressure distillation on supernate; performing freeze drying to obtain branch and leaf crude extract dry powder; dissolving the branch and leaf crude extract dry powder in water; performing macroporous resin treatment; then, eluting by using the ethanol water to obtain drips; and respectively performing vacuum concentration and the freeze drying to obtain a refined branch and leaf extract. The total phenol content of the obtained extract is 66.5 percent, and the total phenol content of a branch extract is 84.1 percent. The diphenylpicrylphenylhydrazine (DPPH) scavenging activity of the extract is 7.9 and 7.8 times of that of glutathione, and the oxygen radical absorbing capacity of the extract is 7.0 and 6.2 times of that of the glutathione. The extract is good in inhibitory activity on xanthine oxidase and can be used for preparing antioxidants, gout suppressants and health-care products.

The invention discloses a process for simultaneously preparing an antioxidative peptide and an antifreeze peptide through enzymolysis of collagens. The method comprises the following steps: extractingcollagens by taking salmon skin as a raw material, hydrolyzing the collagens into a short peptide solution by utilizing crude enzymes of extracellaluar protease obtained by fermentation of Vibrio sp.SQS2-3, performing centrifugal ultrafiltration by a 3000 Da ultrafiltration tube 4500*g for 45 minutes so as to obtain the antifreeze peptide with effects of protecting myosin and relieving decreaseof Ca<2+>-ATPase activity in multigelation, performing Sephadex LH-20 gel filtration chromatography to separate lower ultrafiltration components so as to obtain the antioxidative peptide which has effects of scavenging DPPH free radicals and hydroxyl radicals and a certain ability of inhibiting DNA oxidative damage and shows concentration-dependent antioxidant activity in oxygen radical absorptioncapacity detection. The LC-MS technology shows that the antioxidant component contains 19 polypeptides.

A nutritional supplement to improve learning, academic, and behavioral performance, particularly of children in academic settings, comprising a quantity of flavonoid compounds with oxygen radical absorbance capacity (ORAC) derived from a multitude of plant substances, lipoic-carotenoid compounds, and a neurotransmitter amino acid.

The invention relates to antioxidant peptide and a preparation method thereof. According to the preparation method, peanut meal enzymolysis liquid is obtained by utilizing peanut meal and self-made koji-forming enzymes and through enzymatic hydrolysis; then the peanut meal enzymolysis liquid is separated and purified by utilizing an ultrafiltration membrane, a gel filtration chromatograph and a reversed-phase high-performance liquid chromatograph, so as to obtain a new antioxidant peptide product; and the amino acid sequence of the new antioxidant peptide product is determined. The amino acid sequence of the product is Tyr-Gly-Ser, and the molecular weight of the product is 325.3Da; the product has very strong antioxidant effect, and the oxygen free radical absorption capability of the product is 4 times of that of reduced glutathione; and the antioxidant peptide has the characteristic of small molecular weight and can be directly absorbed by human bodies, so that the antioxidant peptide can be widely applied to the fields of foods, health care products, cosmetics, and the like.

The invention relates to an antioxidative peptide and a preparation method for the same. A novel antioxidative peptide product is prepared by hydrolyzing hylarana guentheri proteins via an enzymic method to obtain hylarana guentheri protein enzymatic hydrolysate, and performing separation and purification on the hylarana guentheri protein enzymatic hydrolysate by virtue of an ultrafiltration membrane, an ion exchange chromatography, a gel filtration chromatography and a reversed-phase high-performance liquid chromatography, and the amino acid sequences of the product are determined. The amino acid sequences of the product are Leu-Lys(259.1607Da) and Phe-Lys(293.1446Da), as well as have an antioxidative effect, and high oxygen radical absorption capacities which are 7.83 times and 15.78 times than crude peptides; and moreover, the peptide has the characteristics of being low in molecular weight, and capable of being directly absorbed by a human body, thus being capable of being widely applied to the fields of foods, healthcare products, cosmetics, and the like.

Methods for providing broad spectrum photo protection to skin using antioxidants that provide UVA protection to skin are described. The methods include topically applying a cosmetic composition comprising: (a) at least one antioxidant having an Oxygen Radical Absorbance Capacity (ORAC) of at least 10,000 μmol TE/g and a Hydroxyl Radical Absorbance Capacity (HORAC) of at least 2,600 μmol GAE/g; (b) at least one organic UV filter; and (c) a cosmetically acceptable carrier; wherein the cosmetic composition provides an increase in UVA_PPD PF of at least 30% relative to an otherwise identical cosmetic composition without the antioxidant(s) of (a). The disclosure also relates to the cosmetic compositions useful in the described methods.

The invention discloses a method for discriminating true and false of propolis through combination of fingerprint spectrum and antioxidation activity, which belongs to the quality discriminating of traditional Chinese medicine raw material quality control category, and specially relates to the method for identifying the true and false of the propolis raw material and its product by the high-pressure liquid-phase fingerprint spectrum and special antioxidation characteristic of the propolis. The method comprises three steps of fingerprint spectrum determination, oxyradical absorption capabilitydetermination and sample identification. Under same test condition, the fingerprint spectrum of a sample is compared with the fingerprint spectrum for simultaneously detecting the propolis and a poplar gum sample, several characteristic peaks in the fingerprint spectrum of the sample are selected, and true, false or adulteration of the propolis can be determined by convenient comparison and resultdetermination. The antioxidation specific index limitation and the fingerprint spectrum are combined for identifying the true, false or adulteration of the propolis.

The invention discloses a polypeptide with antioxidant activity and liver protection activity, a polypeptide coding gene as well as a preparation method and an application of the polypeptide. The amino acid sequence of the polypeptide is Tyr-Phe-Leu-Pro. According to ORAC (oxygen radical absorbance capacity) experiment evaluation for antioxidation capacity of the synthetic peptide, ethanol can induce a certain degree of damage to liver cells (LO2), an LO2 cell damage model is used for evaluating the liver protection effect of the synthetic peptide, and results show that the synthetic peptide can reduce the damage effect of ethanol on the LO2 cells and has wide application prospect in preventing and treating ALD (alcoholic liver disease).

The invention discloses a processing method of black Chinese wolfberry fruits. The processing method of the black Chinese wolfberry fruits comprises the following steps: preparing an alcohol solution of which the concentration is higher than 70% (v/v) and the temperature is 18-25 DEG C, and utilizing the alcohol solution as a washing solution; washing the black Chinese wolfberry fruits in the washing solution, wherein the washing time is 0.5-60 minutes; drying the washed black Chinese wolfberry fruits until no moisture is on surfaces of the black Chinese wolfberry fruits; and heating the processed black Chinese wolfberry fruits by microwave. The processing method of the black Chinese wolfberry fruits disclosed by the invention is highly effective and simple, and is capable of obviously reducing total numbers of colonies of the black Chinese wolfberry fruits, so that the processing method has good sterilizing effects; moreover, the processing method is also capable of greatly reducing anthocyanin losses during the washing processes of the black Chinese wolfberry fruits. The black Chinese wolfberry fruits processed by the processing method have the following advantages: the total numbers of colonies are smaller or equal to 1.5 plus 102 (CFU/g), the anthocyanin loss rates are kept under 5%, and the oxygen radical absorbance capacities are 400-700 micromoles TE/gram; and the prepared black Chinese wolfberry fruits are fresh and bright in color and luster, safe and reliable to human body, green and environment-friendly.

The invention discloses frosted walnut kernels and a preparation method thereof. Making raw materials of the frosted walnut kernels comprise the following components of walnut kernels, plant raw materials having functions of clearing heat and removing toxicity, snow pear juice, white sugar, milk powder, citric acid, frosting fluid and frost powder, wherein the frost powder comprises white sugar powder and menthol powder. According to the frosted walnut kernels disclosed by the invention, the ingredients having the efficacy of clearing heat, removing toxicity, reducing pathogenic fire and diminishing inflammation, such as the snow pear juice, honeysuckle flowers, chrysanthemum flowers, mint leaves and menthol, are added, so that the ORAC (oxygen radical absorbance capacity) of products is improved, the frosted walnut kernels not only can have a certain function of reducing internal heat but also can provide refreshing mouth feel, and the intrinsic greasy feel of walnut nuts can be reduced.

The invention provide a purple perilla seed anti-oxidizing heptapeptide and a preparation method of same. The anti-oxidizing heptapeptide has the following sequence: Ser-Gly-Pro-Val-Gly-Leu-Trp (SGPVGLW). An in-vitro test proves that the heptapeptide can effectively remove ABTS and has a strong oxygen radical absorbance capacity (ORAC); and meanwhile, the heptapeptide can effectively inhibit lipid peroxidization of linoleic acid. A cellular test proves that the heptapeptide is safe to cells, and has significant inhibiting effects on oxidative damage of HepG-2 cells. The anti-oxidizing heptapeptide has simple structure, is safe and has strong anti-oxidizing activity, can be used as an excellent replacement of artificially synthesized anti-oxidizing agent, and has an important value in the fields of development and application of novel anti-oxidizing health-caring products and food additives.

An antioxidant agent capable of easily enhancing the intake of ORAC (Oxygen Radical Absorbance Capacity) is proposed. The antioxidant agent includes tealeaf as an active ingredient for enhancing ORAC. The tealeaf is preferably plucked from tea Camellia sinensis, decaffeinated or in a powdery form having a median diameter equal to or less than 50 μm. A beverage using such antioxidant agent is also proposed.

The invention discloses a synthetic polypeptide, a synthesis method and an application of the synthetic polypeptide, and a gene encoding the synthetic polypeptide. The amino acid sequence of the polypeptide is Leu-Val-Tyr-Pro and is shown as in a sequence table SEQ ID No:1. The polypeptide is synthesized through solid-phase synthesis by using a polypeptide synthesizer. The oxygen radical absorbance capacity (ORAC) experiment is conducted on the polypeptide, and the result shows that the polypeptide has certain antioxidant ability. The polypeptide is applied to an ethyl alcohol induced liver injured cell model, an MTT (Methyl Thiazolyl Tetrazolium) detection method is used to verify the protection action of the polypeptide on an LO2 cell, the result shows that the polypeptide inhibits the ethyl alcohol induced LO2 cell to reduces the survival rate, and the polypeptide has a certain effect on protecting the liver and is applied to the protecting the alcoholic liver disease.