QUASIPARTICLE THEORY OF THE SURFACE TENSION OF LIQUID 3He AND DILUTE SOLUTION OF 4He IN 3He+

1978 ◽  
Vol 39 (C6) ◽  
pp. C6-201-C6-202
Author(s):  
W. F. Saam
Keyword(s):  
Surface Tension ◽  
Dilute Solution

Article

1998 ◽  
Vol 76 (2) ◽  
pp. 152-157
Author(s):  
Catherine E Drennan ◽  
Rachelle J Hughes ◽  
Vincent C Reinsborough ◽  
Oladega O Soriyan
Keyword(s):  
Surface Tension ◽  
Critical Micelle Concentration ◽  
Mixed Micelles ◽  
Anionic Surfactants ◽  
Sodium Dodecyl ◽  
Surfactant Solution ◽  
Kinetic Studies ◽  
Stopped Flow ◽  
Dilute Solution ◽  
Surfactant Micelles

Kinetic studies through stopped-flow spectroscopy were undertaken in the dilute solution range of anionic surfactants where pronounced rate enhancement or inhibition of Ni2+-ligand complexations is often observed at surfactant concentrations much below the critical micelle concentration (CMC). The results are interpreted in terms of Ni-surfactant micelles as the agents responsible for the rate changes in dilute surfactant solution. At higher surfactant concentrations these micelles are transformed into mixed micelles (counterion and size changes), eventually becoming normal surfactant micelles close to the CMC. Surface tension, dye solubility, conductivity, and fluorescent probe investigations support this interpretation.Key words: micellar catalysis, sodium dodecyl sulfate, micelles, critical micelle concentration, premicelles, Ni2+-ligand complexations.

Isothermes of Grain Boundary Tension and Grain Boundary Adsorption in Cu-Sn System

2006 ◽  
Vol 258-260 ◽  
pp. 427-432
Author(s):  
Danil V. Vaganov ◽  
Sergei Zhevnenko
Keyword(s):  
Surface Tension ◽  
Free Surface ◽  
Grain Boundary ◽  
Pure Copper ◽  
Boundary Surface ◽  
Dilute Solution ◽  
Tin Alloys ◽  
Tension Free

Grain boundary surface tension and surface tension of free surface for pure copper and copper-tin alloys are measured. On the base of these data isothermes of grain boundary tension, free surface tension and isothermes of adsorption are constructed in assumption of a dilute solution.

scholarly journals Adsorption of lauryl sulphonic acid in the surface of its aqueous solution, and the Gibbs theorem

1940 ◽  
Vol 174 (958) ◽  
pp. 286-298 ◽  
Keyword(s):  
Aqueous Solution ◽  
Surface Tension ◽  
Sulphonic Acid ◽  
The Other ◽  
Absolute Amount ◽  
Dilute Solution ◽  
Exposed Surface ◽  
No Adsorption ◽  
Interferometer Method ◽  
Negative Adsorption

The absolute amount of adsorption per square centimetre of exposed surface of a solution may be measured with certainty and with moderate accuracy. In the microtome method (McBain and Humphreys 1932; McBain and Swain 1936; McBain, Ford and Mills 1940) the quiescent surface is cut from a solution in complete equilibrium with its vapour, collected, and analysed. In the interferometer method (Ford and McBain 1936; McBain, Mills and Ford 1940) a similar surface in equilibrium is compressed into the bulk of the liquid in the path of an interferometer beam which measures excess coming from the known surface destroyed. Both methods applied to solutions of lauryl sulphonic acid, C 12 H 25 SO 3 H, agree in showing strong positive adsorption over the whole range of concentrations. On the other hand, the curve of surface tension with concentration is of Type III, showing very great lowering in extreme dilution, leading immediately to a minimum, followed by a definite rise to a shallow maximum, with a slight decrease of this already low value with further concentration. The Gibbs theorem demands an initial positive adsorption of the acid, followed by no adsorption at all where the surface tension is most lowered, followed by strong negative adsorption, then zero adsorption, still in dilute solution with very low surface tension, followed by slight positive adsorption.

Isothermes of Surface and Grain Boundary Tension of Cu-Based Alloys with Sb, Sn, In

2008 ◽  
Vol 273-276 ◽  
pp. 608-615 ◽  
Author(s):  
Evgeny I. Gershman ◽  
Sergei Zhevnenko
Keyword(s):  
Surface Tension ◽  
Grain Boundary ◽  
Pure Copper ◽  
Dilute Solution ◽  
Free Energies

Grain boundary and surface tension for pure copper and copper-based alloys with Sb, Sn and In are measured by zero creep method. On the base of these and literature data, using the Shyshkovsky equation for a dilute solution, the isothermes of surface tension and grain boundary tension are constructed in Cu-based alloys with Sb, Sn, In and also Bi and Au. It is shown that all solutes are active on the surface tension of copper. The free energies of adsorption are negative and decrease in a following consequence: Bi, Sb, Sn, In, and Au.

Grain Boundary Surface Tension, Segregation and Diffusion in Cu-Sn System

2007 ◽  
Vol 264 ◽  
pp. 39-46
Author(s):  
Evgeny I. Gershman ◽  
Sergei Zhevnenko
Keyword(s):  
Surface Tension ◽  
Free Surface ◽  
Grain Boundary ◽  
Diffusion Coefficients ◽  
Boundary Diffusion ◽  
Pure Copper ◽  
Boundary Surface ◽  
Dilute Solution ◽  
Tin Alloys ◽  
And Diffusion

Grain boundary and free surface tension for pure copper and copper-tin alloys are measured. On the base of these data isothermes of grain boundary tension, free surface tension and isothermes of adsorption are constructed in assumption of a dilute solution. Grain boundary diffusion coefficients of copper were calculated by using the relation of Borisov et. al. for copper and copper-tin alloys.

Immunoferritin localization of intracellular antigens in positively stained frozen sections

1978 ◽  
Vol 36 (2) ◽  
pp. 168-169
Author(s):  
K. T. Tokuyasu
Keyword(s):  
Surface Tension ◽  
Water Surface ◽  
Thin Layers ◽  
The Other ◽  
Positive Staining ◽  
Frozen Sections ◽  
The Past ◽  
Ultrathin Frozen Sections ◽  
Definition Of

During the past investigations of immunoferritin localization of intracellular antigens in ultrathin frozen sections, we found that the degree of negative staining required to delineate u1trastructural details was often too dense for the recognition of ferritin particles. The quality of positive staining of ultrathin frozen sections, on the other hand, has generally been far inferior to that attainable in conventional plastic embedded sections, particularly in the definition of membranes. As we discussed before, a main cause of this difficulty seemed to be the vulnerability of frozen sections to the damaging effects of air-water surface tension at the time of drying of the sections.Indeed, we found that the quality of positive staining is greatly improved when positively stained frozen sections are protected against the effects of surface tension by embedding them in thin layers of mechanically stable materials at the time of drying (unpublished).

Sign in / Sign up

Export Citation Format

Share Document