Showing papers on "Potassium dichromate published in 1981"
TL;DR: It is suggested that a low-molecular-weight, chromium-binding substance (LMCr) is formed in liver which participates in retention and excretion of Cr in the body.
55 citations
TL;DR: The administration of potassium dichromate to rats caused significant elevation of urine output, urinary proteins and some urinary euzymes and kidney and liver enzyme levels in the treated rats were correspondingly reduced suggesting that potassium dichrome is toxic to both the liver and the kidney.
Abstract: 1. 1. The administration of potassium dichromate to rats caused significant elevation of urine output, urinary proteins and some urinary euzymes. 2. 2. Kidney and liver enzyme levels in the treated rats were correspondingly reduced suggesting that potassium dichromate is toxic to both the liver and the kidney. 3. 3. The use of urine volume, urinary protein and urinary enzyme changes could be useful in detecting the nature of damage caused by some toxic chemical compounds.
22 citations
TL;DR: Chromium in gills of moribund fish (“dead”) was higher than in still alive but identically treated fish, and some small effect of pH and a clear effect of the whitening was found.
13 citations
TL;DR: In this article, a number of solutions containing different concentrations of silver and dichromate ions and sulphuric acid were investigated for the measurement of doses up to 10 Mrad, using simple empirical equations for the calculation of dose from the absorbance of solutions.
12 citations
TL;DR: In this article, the oxidation of 2,5-diphenylpyrrole with potassium dichromate gave the dimer 2,2′,5,5′-tetraphenyl-3,3′-bipyrrole (2) and the related related hydroxy-derivative 3-(2,5)-triphenyl pyrrole-3-yl)-2,1.2-e]indole (3.
Abstract: As in the oxidative reaction of 2,3,5-triphenylpyrrole previously studied, the oxidation of 2,5-diphenylpyrrole with potassium dichromate gave the dimer 2,2′,5,5′-tetraphenyl-3,3′-bipyrrole (2) and the related hydroxy-derivative 3-(2,5-diphenylpyrrol-3-yl)-2,5-diphenyl-2H-pyrrol-2-ol (6), together with the tetracyclic compound 1,6a-dihydro-2,5,6a-triphenylbenzo[g]pyrrolo[3.2-e]indole (3), whose formation involves the α-position of the pyrrole nucleus and the α′-phenyl group of the other pyrrole ring. In addition, large amounts of both the trimer 2,3-bis-(2,5-diphenylpyrrol-3-yl)-2,5-diphenyl-2H-pyrrole (4) and the tetracyclic compound 6a,6b-dihydro-1,3,5,6a,6b,8-hexaphenyl-2H-benzo[1,2-c:4,3-b′:5,6-b″]tripyrrole (5) were obtained. The formation of the various products of the oxidation is demonstrated in terms of the intermediate (2).
10 citations
Journal Article•
TL;DR: In fresh milk samples and potassium dichromate preserved milk samples the use of glutaraldehyde as a fixative required adjustment of the threshold setting on the cell counter in order to produce results comparable to those obtained from formalin fixed samples.
Abstract: Fresh milk samples and potassium dichromate preserved milk samples were stored at both ambient, approximately 21 degree C, and refrigerator temperatures, 3-5 degree C, for varying lengths of time before somatic cell counts were performed on an electronic particle counter Fresh milk samples stored at ambient temperatures became unacceptable for somatic cell counting by 16 hours while those stored in the refrigerator were acceptable for up to three days Once dichromate had been added to the milk no difference in cell counts attributable to temperature of storage were detected and there was very little change with time up to 14 days On the average the addition of the dichromate elevated the cell counts/mL As well a method of rapid fixation of milk involving the addition of glutaraldehyde prior to counting was evaluated In fresh milk samples the use of glutaraldehyde as a fixative required adjustment of the threshold setting on the cell counter in order to produce results comparable to those obtained from formalin fixed samples With dichromate preserved milk samples, glutaraldehyde fixation generally elevated the cell counts but the results were variable
4 citations
TL;DR: In this article, the possibility of using the sorbitoi complex of divalent tin in volumetric analysis was studied, and it was found polarographically and voltammetrically that the Sn(IV)-sorb/Sn(II) sorb, system is irreversible.
4 citations
TL;DR: The doubling time of the chronically exposed cell populations increased even in the absence of K2Cr2O7, but they did not change their morphology (light level), nor contain as many giant cells as newly exposed control populations.
4 citations
TL;DR: A simple method for the determination of total bromide in foods was investigated in this article, where a 10g sample was ashed with magnesium oxide and dissolved in water, and the solution was oxidized with potassium dichromate sulfuric acid mixture in a bromine generator.
Abstract: A simple method for the determination of total bromide in foods was investigated.A 10g sample was ashed with magnesium oxide and dissolved in water. After centrifugation, the solution was oxidized with potassium dichromate sulfuric acid mixture in a bromine generator. The liberated bromine was reacted with fluorescein and quantitated by measurement of the absorbance at 515nm. Chlorine ion did not interfere at up to 1200-fold excess. Iodine ion could be eliminated before the assay by bubbling nitrogen through the solution under mild oxidizing conditions. This method can determine as little as 2.5ppm of bromine in a sample. The recoveries of bromine added to bread and fish jelly products were 98-104%.
1 citations
TL;DR: The optimum conditions for the titration of antimony(III) with dichromate, and diphenyl-aminesulphonic acid as indicator, have been established and can be done as easily as an iron(II) titration and the end-point is equally sharp.
1 citations
Patent•
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02 Mar 1981
TL;DR: The control of fungus is a serious problem in the hatching of fish Sodium dichromate, potassium dichrome, and chromium trioxide are effective fungicides for the inhibition of fungal growth on fish eggs and young fry during hatching as discussed by the authors.
Abstract: The control of fungus is a serious problem in the hatching of fish Sodium dichromate, potassium dichromate and chromium trioxide are effective fungicides for the inhibition of fungal growth on fish eggs and young fry during hatching
Patent•
27 May 1981
TL;DR: A solarlight absorbing member formed with a black coating over the surface of a base material made of carbon steel or low alloy steel and then immersing the same in a molten salt consisting of sodium dichrome and potassium dichromate is presented in this article.
Abstract: PURPOSE:To enhance heat resistance and corrosion resistance, by spraying austenite stainless steel over the surface of a base material made of carbon steel or the like, and then immersing the same in a particular molten salt, thus forming a black coating over the surface of said base material. CONSTITUTION:A solarlight absorbing member formed with a black coating over the surface thereof is obtained by spraying austenite stainless steel over the surface of a base material made of carbon steel or low alloy steel and then immersing the same in a molten salt consisting of sodium dichromate and potassium dichromate. Here, the thickness of the spray-coated layer of austenite stainless steel can be about 200- 300mu. However, if a high weather resistance is required, the thickness is increased to about 500mu. Further, the mixing ratio of potassium dichromate and sodium dichromate of the molten salt by weight is preferably 1:1. The temperature suited for the above process is about 420 deg.C and the time suited for the immersion is preferably 45min.