RESUMO
Pentacyclic triterpenoids are important natural products widely presenting in nature with rich bioactivities. Tripterygium wilfordii Hook. f., a precious Chinese medicinal material, is used to cure rheumatoid arthritis, nephrotic syndrome, systemic lupus erythematosus. Triterpenoids are one of the important active components of Tripterygium wilfordii Hook. f. Demethylzeylasteral extracted from Tripterygium wilfordii Hook. f. had numerous pharmacological effects, including anticancer, anti-inflammatory, immune suppression, anti-fertility, antivirus, antimicrobial. In this paper, we summarized comprehensively pharmacological activities of demethylzeylasteral for potential application as a therapeutic agent.
Assuntos
Medicamentos de Ervas Chinesas , Triterpenos , Tripterygium , Estrutura Molecular , Triterpenos/farmacologia , Medicamentos de Ervas Chinesas/farmacologiaRESUMO
The ultraviolet absorbent extracted from mango leaves, was discolored by some decoloring agent. Then the spectral properties of the discolored ultraviolet absorbents were analyzed. The discolored method of ultraviolet absorbent was studied by comparing one with the others. The results showed that the discoloring effect was satisfactory by using active carbon, H2O2, citric acid, and oxalic acid as decoloring agent. Specially, when oxalic acid was used as decoloring agent, the color of the production was slight, the rate of production was high, and the absorption effect of ultraviolet ray was well. When the concentration of the ultraviolet absorbent solution is 0.5% (w/w), the ultraviolet ray transmission was smaller than 0.3% in 200-370 nm, and it increased slightly from 370 nm. There was a maximum value at 400 nm, approaching 12%.
Assuntos
Mangifera/química , Extratos Vegetais/química , Análise Espectral/métodos , Raios Ultravioleta , Ácido Cítrico/química , Peróxido de Hidrogênio/química , Oxalatos/química , Folhas de Planta/químicaRESUMO
Some dozens of ultraviolet absorbents were extracted from leaves of pure natural plants, such as frangipani, mango, and sweet-scented osmanthus. Then the spectral properties of these ultraviolet absorbents were analyzed. The plant that has the best effect of absorbing ultraviolet ray was selected by comparing one with the others. And the method of extracting ultraviolet absorbent was studied. The results showed that the method, which used leaves of mango as material, distilled water as extracted solvent, and alcohol as precipitator, was satisfactory. When the concentration of ultraviolet absorbent solution is 1% (w/w), the ultraviolet ray transmission is smaller than 1% in 200-400 nm. The rate of production is 1.5%. It is innoxious.
Assuntos
Extratos Vegetais/química , Plantas/química , Protetores Solares/química , Extratos Vegetais/isolamento & purificação , Folhas de Planta/química , Espectrofotometria Ultravioleta , Protetores Solares/isolamento & purificaçãoRESUMO
There are many kinds of oil matrix raw materials used in skin care products. Their spectral properties are different. The matrix raw material that has better ultra-violet absorption will enhance the sun-screening agent effect obviously. In the present article the spectral properties of six oil matrix raw materials often used in skin care products were mainly measured and analyzed by spectrophotometer. The analysis of T-lambda spectra shows that castor oil can absorb ultraviolet as well as near infrared light. It was shown that castor oil chosen as the matrix raw material will improve the effect of sun-screening agent and enhance the products. The function of sun-screening agent and skin health care product will stand out clearly.
Assuntos
Óleo de Rícino/química , Emolientes/química , Higiene da Pele , Espectrofotometria/métodos , Qualidade de Produtos para o Consumidor , Humanos , Espectrofotometria UltravioletaRESUMO
Chinese herbal medicines as additives in cosmetic can both keep the properties of cosmetic and have maintaining, health protection and remedial effect. Some of the Chinese herbal medicines can absorb ultraviolet and cure sunburn. This article mainly studies the spectral properties of several kinds of Chinese herbal medicine additives in cosmetic by ultraviolet and visible spectrophotometer, and analyses the ultraviolet absorption of the Chinese herbal medicine additives. It was shown that gynostemma pentaphyllum can absorb ultraviolet very well. It can be a promising natural additive in the health protection cosmetic. Codonopsis pilosula, floss chrysanthemum indicum, radix scutellariae and radix glycyrrhizae can absorb ultraviolet. They can also be the additives, while ligusticum wallichii can't absorb ultraviolet, so it can not be used as the sunburn protection additive.
Assuntos
Codonopsis/química , Cosméticos/farmacologia , Ligusticum/química , Codonopsis/efeitos adversos , Terapias Complementares , Medicamentos de Ervas Chinesas/química , Medicina Tradicional Chinesa , Preparações Farmacêuticas , FitoterapiaRESUMO
The serum sample solution was prepared by using acid digestion and the Se concentration in it was determined by ICP-AES. At the same time, the interference from Fe and the interference-free method were studied. The results showed that the recovery of standard addition was 91.6%, the relative standard deviation(n = 10) was 2.147% and when KOH was added to the sample solution the interference was reduced greatly. The method is efficient, accurate and easy to operate.