Reduction of Potassium Chromate By Tannins

1998 ◽  
Vol 71 (8) ◽  
pp. 1993-1998 ◽  
Author(s):  
Hirohumi Arakawa ◽  
Norimoto Watanabe ◽  
Rui Tamura ◽  
Chebrolu Pulla Rao
Keyword(s):  
Potassium Chromate

An EPR study of manganese(II) complexes in potassium chromate single crystal

1993 ◽  
Vol 49 (11) ◽  
pp. 1621-1627 ◽  
Author(s):  
Prem Chand ◽  
Jilson Mathew ◽  
Alex Punnoose ◽  
B.P Maurya ◽  
R.J Singh
Keyword(s):  
Single Crystal ◽  
Potassium Chromate

scholarly journals Effect of heavy metal, copper sulphate and potassium chromate on behaviour of “Tailless water flea” Simocephalus vetulus (Crustacea - Cladocera)

2018 ◽  
Vol 10 (1) ◽  
pp. 507-517
Author(s):  
Anand Mishra ◽  
Sanjive Shukla ◽  
A. K. Chopra
Keyword(s):  
Aquatic Ecosystem ◽  
Copper Sulphate ◽  
Well Being ◽  
Potassium Chromate ◽  
Water Flea ◽  
Simocephalus Vetulus ◽  
Lc50 Value ◽  
Aquatic Flora ◽  
Excess Quantity ◽  
Activity Loss

Water fleas constitute major zooplankton population of fresh water aquatic ecosystem. Their population density is an indicative of well-being of aquatic bodies. Simocephalus vetulus (Crustacea - Cladocera) is a tailless water flea and is well suited lab model for environmental monitoring. Copper a Gray listed heavy metals despite being an essential micronutrient, becomes highly toxic when present in excess quantity in aquatic ecosystem thereby causing deleterious effects on aquatic flora as well as fauna. The water-flea exposed to acute 0.37 mg/l (96hr LC50), sub-acute 0.0925 mg/l (25% of 96hr LC50) value and chronic 0.037 mg/l (10% of 96hr LC50) value of copper sulphate and acute 0.16 mg/l (96 hr LC50), sub-acute 0.04 mg/l (25% of 96 hr LC50) value and chronic 0.016 mg/l (10% of 96 hr LC50) value of potassium chromate showed behavioural alterations like initial hyperactivity, fast appendage movements and in phototaxis, geotaxis and avoidance indices. At later stage erratic swimming and spinning, reduced activity, loss of balance, reduced feeding and darkening of cuticular coloration, reduced phototactic, geotaxis and avoidance indices were the major effects on its behaviour. The behavioural alterations of S. vetulus showed the most susceptible and foremost indication of potential toxic effects. Various behavioural parameters, used in present study may serve as better biomarkers about metal toxicity and monitoring of drinking water quality

scholarly journals Inhibitive characteristics of cetylpyridinium chloride and potassium chromate addition on type A513 mild steel in acid/chloride media

2017 ◽  
Vol 4 (1) ◽  
pp. 1318736 ◽  
Author(s):  
O.S.I. Fayomi ◽  
A.P.I. Popoola ◽  
T. Oloruntoba ◽  
A.A. Ayoola ◽  
Eileen Harkin-Jones
Keyword(s):  
Mild Steel ◽  
Acid Chloride ◽  
Cetylpyridinium Chloride ◽  
Potassium Chromate

ESR measurements of irradiated anion doped potassium chromate

1970 ◽  
Vol 32 (2) ◽  
pp. 369-371 ◽  
Author(s):  
M. Schara ◽  
M. Šentjurc ◽  
S.M. Milenkovic ◽  
S.R. Veljković
Keyword(s):  
Potassium Chromate

Temperature Variation of Principal Moments of Some Polyatomic Crystals

1973 ◽  
Vol 28 (1-2) ◽  
pp. 23-25 ◽  
Author(s):  
O. P. Singhal
Keyword(s):  
Solid State ◽  
Temperature Coefficient ◽  
Single Crystals ◽  
Air Temperature ◽  
Entire Range ◽  
Room Temperature ◽  
Small Variation ◽  
Potassium Chromate ◽  
Absorption Frequency ◽  
Ammonium Dichromate

Principal moments of some of the polyatomic single crystals such as ammonium dichromate, ammonium chromate, potassium chromate and potassium permanganate have been determined from room temperature down to liquid air temperature. These have been found to decrease with the decrease of temperature. This variation is smaller in magnitude. It has been observed that the temperature coefficient of the principal moments has almost the same value over the entire range of temperature. This small variation of paramagnetism has been attributed to the variation of absorption frequency in solid state.

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