free radicals involved in a number of diseases due to the oxidative damage to dna, lipids, and proteins and which can result in failure of cellular functions. dried plant bulbs and leaves methanolic and ethanolic extracts were prepared. total antioxidant activities of the methanolic extracts of romulea ramiflora and gagea fibrosa were determined using β-caroten-linoleic acid assay. romulea-bulb...

Of the titrimetric, calorimetric, and gasometric methods now available for determination of amino acids, none is entirely specific. Consequently it has been impossible to tell what proportion of the “amino acid nitrogen” determined in blood or urine with any one of these procedures really represents the amino acids, and what proportion is due to other substances capable of reacting with the rea...

The present paper reports observations on the excretion of the polysaccharid inulin by the normal and phlorizinized dog, these observations having been made prior to, or concurrently with, the observations on man recently reported by Shannon and Smith (1935). The introduction of inulin in renal function studies has been discussed by Richards, Westfall and Bott (1934), by Shannon (1934), by Prof...

A recent paper by Folin and Svedberg (1) introduces new perplexit,ies in the problem of the distribution of blood sugar between corpuscles and plasma. Until recently the view that the concentration of sugar in corpuscles and in plasma is nearly the same found general acceptance. Expressed in a convenient term this means that the ratio of distribution, corpuscle sugar: plasma sugar, is about uni...

Methods available for the measurement of antioxidant capacity are reviewed, presenting the general chemistry underlying the assays, the types of molecules detected, and the most important advantages and shortcomings of each method. This overview provides a basis and rationale for developing standardized antioxidant capacity methods for the food, nutraceutical, and dietary supplement industries....

Although a number of methods have been devised for the quantitative estimation of acetone in the urine, at the present time the method of Messinger,2 as modified by Huppert,s is the one most frequently employed, and is usually regarded as the most accurate one at our command.4 A recent paper by Folin5 offers the first satisfactory method for separately determining the acetone and diacetic acid ...