The oxidation of Mandelic Acids (MA) to the corresponding oxoacids with tripropylammonium fluorochromate (TriPAFC) in aqueous acetic acid has been studied. The reaction is first order with respect to [TriPAFC], [MA] and [H+]. The oxidation of α-deuteriomandelic acid shows the presence of a primary ki...

The aim of the present study was to compare the effectiveness and the safety of different topical agents (glycolic acid, mandelic acid, and grape juice acid mixture) in skin exfoliation by objective instrumental methods. To evaluate the exfoliating effects of these substances, a new experimental in vivo protocol based on DHA (dihydroxyacetone)-induced skin pigmentation was used. Skin acceptabil...

The absorption of ethylbenzene through the skin of the hand and the forearm in men was investigated experimentally. Both the absorption of liquid ethylbenzene and the absorption from aqueous solutions were studied. The rate of absorption of liquid ethylbenzene was 22 to 33 mg./cm.2/hr, and the rates from aqueous solutions were ii8 and 2I5 ,ug./cm.2/hr from mean concentrations of I12 and I56 mg....

The kinetics of oxidations of α-hydroxy acids such as glycolic acid, lactic acid and mandelic acids with piperidiniumchlorochromate has been studied in aqueous acetic acid medium. The reaction order is one with respect to oxidant, substrate and fractional order with respect to hydrogen ion concentration. Decrease in dielectric constant of the medium increases the rate of reaction. No appreciabl...

Mandelic acid can serve as sole source of carbon and energy for the growth of certain strains of Pseudomonas fluorescens. Analysis of the enzymatic patterns of cells grown on various substrates (Stanier, 1947, 1948; Sleeper and Stanier, 1950) has led to formulation of the following sequence for the initial steps in its diimilation: Mandelic acid -b benzoylformic acid -. benzaldehyde -* benzoic ...

In earlier publication1, the authors have reported data on the polarographic behaviour of molybdenum(VI) in three different organic acid media viz. mandelic acid, succinic acid and formic acid — sodium formate and concluded that in medium comprised of 0.1 M mandelic acid, 0.005% thymol and 0.1% camphor Mo(VI) produces a well defined irreversible diffusion controlled doublet wave, the total heig...

A simple and accurate method for the determination of urinary 3-methoxy-4-hydroxy-mandelic acid, vanillyl-mandelic acid (VMA), is described. The separation of VMA from all other phenolic acids in approximately 0.05 ml. untreated urine is achieved by using low-voltage paper electrophoresis with different buffer concentrations for the cathode and the anode. The concentration of the electrophoreti...