Because it promotes the lightening of pigment spots, tyrosinase inhibition is one mechanisms depigmenting cosmetic products. Considering adverse effects produced by synthetic actives, search for new therapeutic options desirable, and plant extracts are possible candidates hyperpigmentation treatment. Glycolic Cecropia pachystachya Trécul are, therefore, focus this study. Its chemical characteri...

The production of lactic acid and value-added chemicals (such as hydroxypropanone, glycolic acid, formic acid) directly from Ulva prolifera via one-step catalytic process was studied. effect different amounts YCl3-derived catalysts on the hydrothermal conversion carbohydrates in explored, reaction conditions were optimized. In this system, rhamnose could be extracted converted situ into hydroxy...

Procedure-To 1 cc. of the solution to be tested 2 cc. of the reagent are added in test-tubes of uniform size. The reagent consists of 800 mg. of diphenylamine (commercial preparation recrystallized from 70 per cent alcohol) in 80 cc. of glacial acetic acid (Baker’s Special for Shellac Analysis)’ and 0.55 cc. of sulfuric acid (c.P., Nand As-free). The mixture is shaken vigorously, and then the t...

A copoly (DL-lactic/glycolic acid) (PLGA), with a weight-average molecular weight of about 8400, has been characterized using fast atom bombardment (FAB)-tandem mass spectrometry in order to determine the sequence. Because of the large molecular size, PLGA was partially hydrolyzed and the terminal hydroxyl groups in the resulting oligomer mixture acetylated as the indicator. The FAB spectrum of...

A hierarchical support vector regression (SVR) model (HSVRM) was employed to correlate the compositions and mechanical properties of bicomponent stents composed of poly(lactic-co-glycolic acid) (PGLA) film and poly(glycolic acid) (PGA) fibers for urethral repair for the first time. PGLA film and PGA fibers could provide ureteral stents with good compressive and tensile properties, respectively....

BACKGROUND The application of systemic isotretinoin in the treatment of cutaneous photoaging has been well investigated. In addition, well-recognized topical antiaging therapies such as superficial chemical peeling (CP) with α-hydroxy acids have been shown to be more helpful when combined with low-dose oral isotretinoin. Even though the combination of systemic isotretinoin and medium to deep CP...

Procedure-To 1 cc. of the solution to be tested 2 cc. of the reagent are added in test-tubes of uniform size. The reagent consists of 800 mg. of diphenylamine (commercial preparation recrystallized from 70 per cent alcohol) in 80 cc. of glacial acetic acid (Baker’s Special for Shellac Analysis)’ and 0.55 cc. of sulfuric acid (c.P., Nand As-free). The mixture is shaken vigorously, and then the t...