This paper reports results of a continuing investigation to evaluate coulometric methods of analysis and to develop highly precise and accurate analytical methods for important materials, based upon this technique. Earlier papers described the coulometric titrations of acids and bases [1] 1 and of halides [2]. The present research is concerned with a typical oxidation-reduction titration, the a...

The asymmetric unit of the title compound, [Cr(C2O4)(C10H24N4)]2[Cr2O7]·8H2O (C10H24N4 = 1,4,8,11-tetra-aza-cyclo-tetra-decane, cyclam; C2O4 = oxalate, ox) contains one [Cr(ox)(cyclam)]+ cation, one half of a dichromate anion that lies about an inversion centre so that the bridging O atom is equally disordered over two positions, and four water mol-ecules. The terminal O atoms of the dichromate...

Like dichromated gelatin ~DCG!, methylene-bluesensitized gelatin ~MBG! is also a potential holographic recording material1,2 and can be used in forming a hologram with a high diffraction efficiency ~DE! and high signal-to-noise ratio ~SNR!. The addition of methylene blue ~MB! into a gelatin or DCG film renders it effective to record holograms with red light from an inexpensive He–Ne laser, whic...

An attempt was made to evaluate chronic effect of Potassium dichromate on Daphnia magna, semi-statically. Based on the results of an acute immobilisation study (48 hour EC50), the test item concentrations of 0.03, 0.05, 0.1, 0.2 and 0.4 mg/L of Potassium dichromate was selected for the chronic investigation. During the study, physico-chemical parameters of M4 medium were recorded and maintained...

BACKGROUND We aimed to evaluate different copro-preservation conditions along the duration of one month for a better outcome of molecular diagnosis of Cryptosporidium species. METHODS Ten samples out of 380 fresh stool samples collected from patients with diarrhea proved positive after direct examination, concentration, staining and confirmed by immunochromatographic test. The study was condu...

The acute toxicity of hexavalent chromium as potassium dichromate (K2Cr2O7) was studied in female albino mice. Reproductive parameters in ovary and uterus and fertility rate were evaluated to investigate the possible effects of chromium intoxication. Seventy-five adult albino mice were used in this study.The mice treated orally with 500 and 1000 ppm of potassium dichromate that dissolved in tap...

Preparation and uses of quinaldinium dichromate and its polymeric analogue poly (2- vinylquinolinium) dichromate as the new monomeric and polymeric oxochromium-amine complex reagents for oxidizing variousorganic compounds, with emphasis on the latter, are described