52 results about "UVB Radiation" patented technology

Compositions and methods are provided for ameliorating various effects of UVA and UVB radiation, especially from the sun. The compositions include an ingredient that prevents photoaging from MED and subMED radiation, namely an MMP (matrix metalloproteinase) inhibitor, especially formulated for oral administration, and more especially formulated for controlled-release so as to provide the MMP inhibitor when MMP induction (including upstream signalling molecules like c-JUN, and / or MMPs like stromelysin) is most prevalent.

A photostable cosmetic composition for protection against UVA and UVB radiations of wavelengths between 280 and 400 nm, which comprises, in a cosmetically acceptable vehicle: (i) at least one UVA-sunscreen agents absorbing predominantly in the UVA-range; (ii) at least one UVB-sunscreen agents absorbing predominantly in the UVB-range; (iii) at least 0.1% by weight of a 2-hydroxy sulfobetaine of cinnamidoalkyl amine compound.

The invention provides compositions and methods for ameliorating various effects of UVA and UVB radiation from the sun. The compositions including an ingredient that prevents photoaging from MED and subMED radiation, such as a retinoid, certain other compounds (such as N-acetylcysteine, 2-furildioxime, and vitamin C) and optionally other MMP inhibitors such as tetracyclines and / or compounds that inhibit the P-450-mediated metabolism of retinoids such as ketoconazole and other azole compounds. In the method, the composition is applied prior to exposure to the sun; depending upon the ingredients used in the composition, application should be from 7 to 48 hours prior to exposure. Compounds that prevent erythema (skin reddening, sunburn) do not necessarily protect against UV-mediated elevation of MMP levels and activity, and similarly compounds that prevent UV-mediated elevation of MMP levels and activity are not necessarily effective against UV-induced erythema.

The invention relates to a UVC radiation-resistant polycarbonate composition as well as a preparation method and application thereof. The polycarbonate composition comprises polycarbonate, SAN, ASA rubber powder, a triazine UV absorbent, a benzotriazole weather-resistant agent, a hindered amine weather-resistant agent, toner, an antioxidant, a metal deactivator and other processing aids. The polycarbonate composition provided by the invention not only has higher UVA and UVB radiation resistance, but also has higher UVC radiation resistance, can effectively prevent aging and yellowing of materials, and can be widely applied to ultraviolet sterilization products.

The invention provides a sunblocking cream which is natural and resists ultraviolet B (UVB) radiation and ultraviolet A (UVA) radiation, and can improve the resisting and defending capacity of the human body cells to ultraviolet radiation. The product comprises the following raw materials in parts by weight: 0.5-5 parts of zingiber corallinum hance essential oil, 0.5-1 parts of curcuma oil, 0.5-1parts of zedoary turmeric oil, 5-8 parts of emulsifier, 1-5 parts of humectant, 1-3 parts of active agent, 8-10 parts of excipient and 62.8-72.3 parts of pure water, and is prepared by the following steps: mixing and heating aqueous phase substances, namely the humectant, active agent and pure water to the temperature of 85-87 DEG C; evenly mixing and heating oil phase substances, namely the zingiber corallinum hance essential oil, curcuma oil, zedoary turmeric oil, emulsifier and excipient to the temperature of 85-87 DEG C; and slowly pouring the oil phase into the aqueous phase, stirring and evenly mixing, homogenizing for 5-10 minutes at the temperature of 85-87 DEG C, and cooling. The sunblocking cream of the invention resists the UVB radiation and UVA radiation, can improve the resisting and defending capacity of the human body cells to ultraviolet radiation, can promote skin cell division and accelerates self renewal of the skin cells; the skin does not generate erythema after being exposed to the sun, and can not be tanned; and the sunblocking cream has good sunblocking effect, low application cost, simple and feasible preparation method.

The invention discloses antarctic ice algae MAAs synthetases as well as coding genes and application thereof. The antarctic ice algae MAAs synthetases comprises MysA, MysB and MysC, the amino acid sequences of the MysA, the MysB and the MysC are respectively shown as SEQ ID NO.7, SEQ ID NO.9 and SEQ ID NO.11, and the nucleotide sequences of the coding genes of the MysA, the MysB and the MysC are respectively shown as SEQ ID NO.8, SEQ ID NO.10 and SEQ ID NO.12. Experiments prove that the coding genes of the three antarctic ice algae MAAs synthetases are cloned and converted into recombinant strains at the same time, the survival rate of the strains in UVB radiation can be effectively increased, the strains can be used for producing MAAs and intermediates thereof, and the produced MAAs has the effect of repairing cell DNA damage and cornea damage caused by ultraviolet radiation and has a high application value.

The invention discloses application of tremella spore exopolysaccharides to preparing aqua defense refreshing products, and an aqua defense refreshing toner containing tremella spore exopolysaccharides. The preparing process of the tremella spore exopolysaccharides includes the steps of firstly, taking supernate of tremella spore fermentation liquid, and adding absolute ethyl alcohol for precipitation; secondly, adding water to precipitates for dissolving, taking supernate, removing protein through a Sevage method, conducting centrifuging to obtain supernate, adding ethyl alcohol for precipitation, and freeze-drying precipitates to prepare the tremella spore exopolysaccharides. The purified exopolysaccharides have a quite good aqua defense effect, and even the defense effect is better thanthat of glycerinum; meanwhile, the exopolysaccharides have a quite good anti-oxidization effect and can be applied as aqua defense active components and anti-oxidization active components to preparing the skincare products; the prepared skincare products have a quite good aqua defense effect and meanwhile have a function of repairing cell injuries caused by UVB radiation.

The invention relates to a method for determining an integral sun protection factor (summa SPF or iSPF) which encompasses both UVA and UVB radiation and can be used for classifying cosmetic and dermatological sunscreens. The method comprises the steps of applying a defined amount of the sunscreen onto a defined area of a skin substrate impregnated with a spin trap, exposing the skin substrate to a defined amount of UVA- and UVB rays by a sun simulator, subjecting the skin substrate exposed to radiation to an electron spin resonance (ESR) measurement, recording the number of free radicals trapped as a real number x 1012 free radicals / mg of skin sample, and determining the integral sun protection factor o SPF according to the equations (1) and (2) and (8).