Specific gravity of Opisthorchis viverrini eggs

1998 ◽  
Vol 72 (4) ◽  
pp. 359-361 ◽  
Author(s):  
T. Harnnoi ◽  
A. Wijit ◽  
N. Morakote ◽  
V. Pipitgool ◽  
W. Maleewong
Keyword(s):  
Specific Gravity ◽  
Sodium Nitrate ◽  
Gradient Centrifugation ◽  
Nitrate Solution ◽  
Opisthorchis Viverrini ◽  
Sedimentation Technique ◽  
Flotation Technique ◽  
Stool Specimens ◽  
Sodium Nitrate Solution ◽  
Human Stool

AbstractThe specific gravity of the eggs of the liver fluke Opisthorchis viverrini was determined using a sucrose gradient centrifugation and found to range from 1.2713 to 1.3043. The peak egg count was located at the sucrose fraction with a specific gravity of 1.2814. An attempt to float eggs in saturated sodium nitrate solution, sp.gr. 1.4, failed. Examination of human stool specimens for O. viverrini eggs by simple flotation in saturated sodium nitrate solution and the formol-ether sedimentation technique revealed that the flotation technique was not as efficient as the sedimentation technique. It was suggested that the flotation techniques were inappropriate for the detection of O. viverrini eggs in faeces or contaminated soil.

Physico-chemical studies of DL-alanine in aqueous sodium nitrate solution

2015 ◽  
Vol 85 (1) ◽  
pp. 162-167 ◽  
Author(s):  
S. Roy ◽  
K. Mahali ◽  
S. Mondal ◽  
R. P. Mondal ◽  
B. K. Dolui
Keyword(s):  
Sodium Nitrate ◽  
Nitrate Solution ◽  
Aqueous Sodium ◽  
Physico Chemical ◽  
Chemical Studies ◽  
Sodium Nitrate Solution

Efficiency of the salt flotation technique in the recovery of Ascaris lumbricoides eggs from the soil

1995 ◽  
Vol 69 (1) ◽  
pp. 1-5 ◽  
Author(s):  
M.O. Ajala ◽  
S.O. Asaolu
Keyword(s):  
Specific Gravity ◽  
Sandy Soil ◽  
Sodium Nitrate ◽  
Ascaris Lumbricoides ◽  
Soil Type ◽  
Zinc Sulphate ◽  
Sandy Soils ◽  
Soil Types ◽  
Flotation Technique ◽  
Zinc Sulphate Solution

AbstractThe efficacy of the salt flotation technique using saturated solutions of sodium nitrate (specific gravity 1.30) and zinc sulphate (specific gravity 1.16) for separating Ascaris lumbricoides eggs from clay, loamy and sandy soils has been investigated. Ten samples of each of the egg concentrations of 100, 500, 2500, 5000 and 10,000 eggs/25 g of soil were used for each soil type. Using T-test and ANOVA, the number of eggs recovered from sand was significantly higher than from loam and the number from loam significantly higher than from clay. With sodium nitrate, the maximum egg recovery rate was 25.04% from sandy soil at a concentration of 500 eggs/25 g soil while with zinc sulphate it was 13.88% also from sandy soil and concentration of 500 eggs/25 g soil. While the number of eggs recovered increased with soil egg concentration, the percentage of eggs recovered is inversely proportional to egg concentration. The number of eggs recovered with sodium nitrate was significantly higher than with zinc sulphate solution in the three soil types.

Kinetics of Passive Film on Low Carbon Steel in Sodium Nitrate Solution by Numerical Analysis Method

2012 ◽  
Vol 457-458 ◽  
pp. 358-364 ◽  
Author(s):  
Ye Han ◽  
Zhen Duo Cui ◽  
Qiang Wei ◽  
Sheng Li Zhu ◽  
Xian Jin Yang
Keyword(s):  
Numerical Analysis ◽  
Carbon Steel ◽  
Passive Film ◽  
Sodium Nitrate ◽  
Nitrate Solution ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Analysis Method ◽  
Sodium Nitrate Solution ◽  
Kinetics Of

Passivation is a common means of material protection against corrosion applied in engineering. It is necessary to study the kinetics of the passive films forming to control the passivation process. A numerical analysis method is proposed and applied to study passivation kinetics of low carbon steel in sodium nitrate solution. Curve of passive film coverage against time is obtained and discussed. A maximum growth rate is found at initiating passive potential during the film forming process, and the film has already begun forming before the initiating passive potential arrived.

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