6 results about "Dpph scavenging" patented technology

The invention relates to lactobacillus mucilaginosus and application thereof in fermented soybean milk. The lactobacillus mucus is preserved in the Guangdong Microbial Culture Collection Center on March 10, 2025, and the preservation number is GDMCC (China General Microbiological Culture Collection Center) No. 65866. The viable count of the fermented lactobacillus mucus in soybean milk is increased by 56%, meanwhile, the activity of beta-glucosidase is remarkably improved to 198 U / mL, and the degradation rate of total purine in soybean milk is 65.32%. In fermentation application, the total polyphenol content and the total flavone content in fermented soybean milk after fermentation are respectively increased by 39.56% and 52.32% compared with those in an unfermented system, the daidzein content and the genistein content in the fermented soybean milk after fermentation are respectively increased by 256.3% and 356.3% compared with those in the unfermented system, and meanwhile, the antioxidant activity ABTS free radical scavenging rate and the antioxidant activity DPPH scavenging rate are obviously increased to 89.6% and 94.8% respectively. The strain shows important application value in the fields of functional food development and natural cosmetic raw material production, and an innovative solution is provided for high-value utilization of plant resources.

The invention relates to ROS (reactive oxygen species) / pH (potential of hydrogen) dual response type viscous fiber composite hydrogel as well as preparation and application thereof, amino-modified zeolite-loaded imidazate skeleton-8 (ZIF-8) nanoparticle short fibers and natural polyphenol drugs are introduced into double-dynamic cross-linked network hydrogel containing boric acid ester bonds and Schiff base bonds, and the ROS / pH dual response type viscous fiber composite hydrogel has ROS and pH response drug / Zn < 2 + > release characteristics; good antibacterial performance and DPPH removing performance are realized. The ZIF-8 / fiber composite hydrogel developed by the invention realizes multiple functions of good tissue viscosity, antibiosis and antioxidation, and can effectively regulate the wound microenvironment and promote the healing of rat diabetes infected wound.

The invention discloses a hesperetin derivative containing a thiosemicarbazone structure and application of the hesperetin derivative, the molecular formula of the compound is C18H19N3O5S, the biological activity determination result shows that the compound has good anti-oxidation and anti-alpha-glucosidase activity, the IC50 value of DPPH scavenging activity is 6.17 mu g / mL, and the activity of the hesperetin derivative is equivalent to that of a control agent vitamin C. The hesperetin derivative containing the thiosemicarbazone structure and the application of the hesperetin derivative containing the thiosemicarbazone structure have good anti-oxidation and anti-alpha-glucosidase activity. The IC50 value of ABTS clearance activity is 0.04 mu g / mL, and the activity is improved by 200 times compared with that of a control medicament vitamin E; the IC50 value of the alpha-glucosidase inhibitory activity is 4.53 [mu] g / mL, which is improved by 51 times compared with the activity of a control agent acarbose; the structural formula of the hesperetin derivative containing the thiosemicarbazone structure is shown in the specification.

This invention relates to the food field and discloses a compound plant product, characterized in that the product comprises jujube extract, soybean peptide, corn oligopeptide, artichoke extract, amla, jujube seed, and optional additives; on a dry basis, the weight ratio of the jujube extract, soybean peptide, corn oligopeptide, artichoke extract, amla, and jujube seed is 1:(0.03-0.5):(0.03-0.5):(0.003-0.02):(0.005-0.05):(0.005-0.05); the tannin content in the product is 0-0.5 mg / g dry basis weight. The compound plant product provided by this invention, through the specific combination of the above components, exhibits higher antioxidant activity, better DPPH scavenging ability, and better ABTS scavenging ability; per gram dry basis, the tannin content is low, with minimal astringency and bitterness, resulting in a superior flavor.

This invention discloses an antioxidant umami bifunctional peptide and its applications. The amino acid sequence of the umami peptide is selected from AGDDAPRA, DDALRSQE, DDIKRVV, DDMEKIW, DKEGNGTVM, and SDMKHWP. The peptide provided by this invention has an extremely low sensory recognition threshold and highly efficient T1R1 / T1R3 taste receptor activation ability (ECG). 50 It has a concentration as low as 0.003 mM and also exhibits significant free radical scavenging activity (DPPH scavenging IC50). 50 (As low as 0.95 mM). This group of peptides solves the technical problems of existing flavoring agents having single function, weak sensory response, and easy oxidation and inactivation in complex systems. It can be widely used as a dual-function food ingredient in meat products, seasonings, and soups. While significantly enhancing the umami flavor of food, it effectively inhibits the oxidative degradation of lipids and proteins, and improves the sensory quality and shelf-life stability of food.

The invention discloses a composition for improving dark fine lines of sensitive skin in a targeted manner as well as preparation and application of the composition, and belongs to the technical field of cosmetics. The composition for improving the dark and fine wrinkles of the sensitive skin in a targeted manner, provided by the invention, is prepared from the following components in parts by mass: 0.01 to 10 parts of oxyresveratrol, 0.01 to 2 parts of fibronectin, 0.01 to 2 parts of carnosine and 0.01 to 3 parts of carrot seed oil. According to the invention, oxyresveratrol, fibronectin, carnosine and carrot seed oil in a specific mass part range are selected and compounded, so that a good inhibition effect on tyrosinase, TNF-alpha and IL-1alpha can be effectively realized, and meanwhile, an excellent DPPH (1, 1-diphenyl-2-picrylhydrazyl) removal effect can also be realized; when the composition is added into cosmetics subsequently, good whitening, anti-inflammatory and anti-wrinkle effects can be achieved.