background: over recent decades, modern protocols of external beam radio¬therapy and radiation techniques such as intensity-modulated radiotherapy (imrt) have been developed. these methods are extremely sensitive to errors in treatment delivery, so that it is essential to apply a high resolution 3d dosimetry system that has high sensitivity and is capable of measuring and verifying the complex ...

Abstract Fricke gel dosimeters were prepared using a matrix based on poly(vinyl-alcohol) chemical cross-linked with glutaraldehyde and loaded Xylenol Orange. The samples irradiated gamma rays to doses in the range of 5–30 Gy consequent color changes investigated by spectrophotometric colorimetric techniques. Starting from measurement transmittance spectra, an analysis was carried out considerin...

A very rapid electrolytic analysis termed 'electrolytic chromatography', using a column electrode with glassy carbon grains, has been developed. The column electrode has been used not only for coulometric detection, but also for separation of metals, elimination of interfering elements, unification of oxidation state, and concentration of an element. Some analytical applications of electrolytic...

The potential use of amphiphilic fullerene derivatives as a bionanomaterial was investigated by cyclic voltammetry (CV), scanning electron microscopy (SEM), and the ferrous ion oxidation-xylenol orange (FOX) method. Despite the disrupted delocalization of the π-electronic system over the C60 sphere, its antioxidant capacity remained high for all twelve derivatives. The compounds expressed up to...

Porous regenerated cellulose (RC) membranes were prepared with cotton linter pulp as a raw material. These membranes were first oxidized on both sides by a modified (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO) oxidation system using a controlled oxidation reaction technique. Then, the oxidized RC membranes were functionalized with polyethylenimine (PEI) via the glutaraldehyde crosslinking me...

The objective of the present study was to establish the method of measurement of hydrogen peroxide and to estimate the anti-oxidative effect of genistein in the skin. UVB induced skin oxidation and anti-oxidative effect of genistein formulations were evaluated by determining levels of hydrogen peroxide. The mechanism involved in the determination of hydrogen peroxide is based on a color reactio...

This paper describes a indirect complexometric method for the determination of mercury in the presence of co-ions, based on the selective masking ability of potassium iodide. To the mixture of mercury (II) and other metal ion solution, EDTA solution was added in excess of the metal ions present. The pH of the solution was adjusted to 5.0-6.0 using solid hexamine (10 ± 2 g) and surplus EDTA was ...