Kinetics of etching of dislocations in ferroelectric lead hydrogen phosphate and lead nitrate phosphate single crystals

1990 ◽  
Vol 9 (9) ◽  
pp. 1036-1038 ◽  
Author(s):  
C. C. Desai ◽  
M. S. V. Ramana ◽  
M. J. Shukla
Keyword(s):  
Single Crystals ◽  
Lead Nitrate ◽  
Hydrogen Phosphate ◽  
Kinetics Of

Study of potential oscillations during reaction of an aluminium single crystal with an aqueous KOH solution

1990 ◽  
Vol 55 (2) ◽  
pp. 345-353 ◽  
Author(s):  
Ivan Halaša ◽  
Milica Miadoková
Keyword(s):  
Aqueous Solutions ◽  
Single Crystal ◽  
Single Crystals ◽  
Periodic Potential ◽  
Optimum Conditions ◽  
Potential Oscillations ◽  
Dilute Aqueous Solutions ◽  
Experimental Findings ◽  
Kinetics Of

The authors investigated periodic potential changes measured on oriented sections of Al single crystals during spontaneous dissolution in dilute aqueous solutions of KOH, with the aim to find optimum conditions for the formation of potential oscillations. It was found that this phenomenon is related with the kinetics of the reaction investigated, whose rate also changed periodically. The mechanism of the oscillations is discussed in view of the experimental findings.

Thermoluminescence kinetics of oxygen-related centers in AlN single crystals

2012 ◽  
Vol 25 ◽  
pp. 59-62 ◽  
Author(s):  
I.A. Weinstein ◽  
A.S. Vokhmintsev ◽  
D.M. Spiridonov
Keyword(s):  
Single Crystals ◽  
Kinetics Of

Etching Kinetics of α-SiC Single Crystals by Molten KOH

1998 ◽  
Vol 264-268 ◽  
pp. 837-840 ◽  
Author(s):  
Masakazu Katsuno ◽  
Noboru Ohtani ◽  
J. Takahashi ◽  
Hirokatsu Yashiro ◽  
M. Kanaya ◽  
...  
Keyword(s):  
Single Crystals ◽  
Kinetics Of

scholarly journals EFFECTS OF CALCIUM HYDROGEN PHOSPHATE ON LEAD UPTAKE BY COWPEA (VIGNA UNGUICULATA)

2020 ◽  
Vol 4 (3) ◽  
pp. 36-42
Author(s):  
M. S. Dagari ◽  
Mohammed Salisu Musa
Keyword(s):  
Vigna Unguiculata ◽  
Lead Nitrate ◽  
Atomic Absorption Spectrophotometry ◽  
Substantial Effect ◽  
Human Consumption ◽  
Hydrogen Phosphate ◽  
Lead Uptake ◽  
Cowpea Seeds ◽  
Phosphate Fertilization ◽  
Phosphate Treatment

The effects of calcium hydrogen phosphate on lead (Pb) uptake by cowpea (Vigna unguiculata) were investigated in a growth chamber experiment coupled with atomic absorption spectrophotometry (AAS) and colorimetry analyses. Cowpea seeds were planted and harvested in soil samples treated with Pb+2 added as lead nitrate at the rates of 0, 1000 and 3000 mg/kg followed by calcium hydrogen phosphate (CaHPO4) at 0, 10, 50 and 250 mg/kg. Increases in shoot yield brought about by phosphate fertilization were observed to oppress the shoot lead concentration as a result of growth dilution, where the actual amount of lead in shoots was unaffected by phosphate treatment. This work revealed that there is no substantial effect on lead uptake by cowpea, as a result of phosphate fertilization. Therefore, phosphate fertilization is a good means of cowpea production with minimal lead uptake and hence safe for human consumption

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