A colorimetric method for analysis of the red cell content of tissues is described, and compared with an independent radioassay method. The introduced method is based upon acid extraction of tissue, treatment with base, and adsorption of the remaining turbidity with lauryl sulfate. Preliminary data are presented on the reproducibility of the colorimetric method on multiple biopsies of the canin...

background; dithiocarbamates, the main group of fungicides, are used to control about 400 pathogens in more than 70 crops. these pesticides are widely applied to crops including potato, cereal, apple, pear and leafy vegetables throughout the world since 1960. from the late 1980s, using these fungicides has caused much debate among regulators about their long-term effects on consumers and occupa...

Recently, novel data-driven offset-sparsity decomposition (OSD) method was proposed by us to increase colorimetric difference between tissue-structures present in the color microscopic image of stained specimen in histopathology. The OSD method performs additive decomposition of vectorized spectral images into image-adapted offset term and sparse term. Thereby, the sparse term represents an enh...

One of the main factors limiting agricultural production in tropical climate regions is mainly related to the presence of exchangeable aluminum (Al) in highly weathered acid soils. Four methods of Al determination extracted with neutral 1 mol L KCl solution were evaluated: three colorimetric methods (aluminon plus ascorbic acid, and eriochrome cyanine R by FIA) and the usual titrimetric method ...

Although of the many colorimetric microestimations of sugar the Folin and Wu method (1920) has remained in most widespread use in clinical laboratory practice, the still increasing number of modifications continue to draw attention to several inherent weaknesses of the method which have not yet been eliminated, one of which is the instability of the colour solution. To avoid these drawbacks a m...

In a recent study (1 ) of diabetic patients with hemoglobins S and C (Hb S and Hb C), we showed a significant decrease in the proportion of glycosylated Hb, as measured by cation-exchange chromatography. We suggested ( I ) that these low values for glycosylated Hb might be caused by the inability of either Hb S or Hb C to undergo glycosylation or by their failure to be eluted from the column wi...