Non-chromotropic substances such as fibrin and gelatin and most tissue and cellular structures stain orthochromatically with internal dye concentrations of such metachromatic dyes as methylene blue and toluidine blue which, if in solution, would be metachromatic. Therefore, at ordinary levels of staining these substances depress the natural tendency of these dyes to change color. However, at el...

Four chelating matrices prepared by coupling Amberlite XAD-2 with chromotropic acid (AXAD-2-CA or 1), pyrocatechol (AXAD-2-PC or 2) and thiosalicylic acid (AXAD-2-TSA or 3) through azo spacer and impregnation of Amberlite XAD-7 with xylenol orange (AXAD-7-XO or 4) have been studied for enrichment of lead(II). All the four resins quantitatively sorb Pb(II) at pH 3.0-8.0 when the flow rate is mai...

IPublished methods for the determination of plasma triglycerides are of two kinds, enzymatic (1-3) and colorimetric (4-7). Both require preliminary removal of phospholipids and saponification of triglycerides. With the enzymatic method, glycerin released is quantitatively determined with the specific enzyme GPDH’ and NAD. In the colorimetric methods, glycerin is oxidized to formaldehyde with pe...

Abstract Three sawfly species ( Hoplocampa minuta, flava, fulviicornis ) have been monitored in plum orchards during the flowering period three consecutive years at different locations Hungary using chromotropic white sticky traps. Black and yellow sawflies H. minuta flava are one of most important pests orchards, however plum-fruit fulvicornis has not yet documented from Hungary. In almost all...