Surface Tension of Aluminum Sulfate Solutions.

1946 ◽  
Vol 50 (3) ◽  
pp. 256-260 ◽  
Author(s):  
H. L. Cupples
Keyword(s):  
Surface Tension ◽  
Aluminum Sulfate ◽  
Sulfate Solutions

scholarly journals Effects of Aluminum and pH on Germination of Echium plantagineum L.

2020 ◽  
Vol 8 (1) ◽  
pp. 313
Author(s):  
Rodrigo Roso ◽  
Ubirajara Russi Nunes ◽  
Caren Alessandra Müller ◽  
Juçara Terezinha Paranhos ◽  
Sidinei José Lopes ◽  
...  
Keyword(s):  
Aerial Part ◽  
Aluminum Sulfate ◽  
Growth Parameters ◽  
Primary Root ◽  
Dry Mass ◽  
The Third ◽  
Sulfate Solutions ◽  
Randomized Design ◽  
Primary Root Length ◽  
Growth Of Seedlings

The objetive of this study was to identify the effects of aluminum concentrations and pH levels of solution on germination of Echium plantagineum L. seeds. Three different experiments were carried out in completely randomized design with four repetitions. In the first experiment, we used aluminum sulfate solutions in concentrations of 0.0; 0.3; 0.6; 1.0; 2.0; 3.0; 4.0; 5.0; 6.0 and 7.0 cmolc L-1 and in the second experiment, solutions with different pH, 3.0; 4.0; 5.0; 6.0; 7.0; 8.0; 9.0 and 10.0. In the third experiment, we carried out a factorial (4x4) with aluminum sulfate solutions (0.0; 2.0; 4.0 and 6.0 cmolc L-1) and pH (4.0; 5.0; 6.0 and 7.0). It was evaluated the germination of Echium plantagineum L. at four and 14 days after seeding (DAS), germination speed index, primary root length, aerial part and dry mass of seedlings. The presence of aluminum reduced the germination by 27 and 40% at four and 14 DAS, respectively, in concentrations superior to 3.0 cmolc L-1. The three growth parameters presented linear reduction with the increase of aluminum concentrations. In the second experiment, the solutions with pH of 3.0 and 10.0 provided increases in germination, length of root and aerial part, and little influence in the dry mass of seedlings. In the third experiment, there was significant interaction between the aluminum concentrations and pH levels of substrate. The presence of aluminum in the substrate presented toxic effect on germination of seeds, length of seedlings and dry mass. The pH of the solution has little effect in germination of seeds and in the growth of seedlings of E. plantagineum.

Specific Gravity of Aluminum Sulfate Solutions.

1945 ◽  
Vol 37 (10) ◽  
pp. 1016-1018 ◽  
Author(s):  
J. W. Silve ◽  
J. E. Chenevey
Keyword(s):  
Specific Gravity ◽  
Aluminum Sulfate ◽  
Sulfate Solutions

scholarly journals The estimation of solid copper surface tension in copper sulfate solutions

2002 ◽  
Vol 67 (11) ◽  
pp. 769-775 ◽  
Author(s):  
Konstantin Popov ◽  
Nebojsa Nikolic ◽  
Zlatko Rakocevic
Keyword(s):  
Surface Tension ◽  
Specific Surface ◽  
Copper Sulfate ◽  
Current Density ◽  
Density Range ◽  
Sulfate Solutions ◽  
Current Density Range ◽  
The Difference ◽  
Limiting Diffusion Current ◽  
Solid Copper

In metal electrodeposition in the limiting diffusion current density range the deposition current density remains constant regardless of the deposition overpotential used. At the same time, the larger the deposition overpotential is the more disperse is the formed deposit, which is characterised by an increased specific surface. The difference in the specific surface of disperse deposits obtained at two different overpotentials in the limiting diffusion current density range is correlated with the difference between the deposition overpotentials. A method for the estimation of the surface tension of solid copper in copper sulfate solutions is also proposed.

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