Vapor Pressure Studies Involving Solutions in Light and Heavy Waters. III. TheSeparation Factor for the Isotopes of Hydrogen during Distillation from Salt Solutions in the Mixed Waters at Room Temperature

1957 ◽  
Vol 61 (3) ◽  
pp. 345-350 ◽  
Author(s):  
John M. Googin ◽  
Hilton A. Smith
Keyword(s):  
Vapor Pressure ◽  
Room Temperature ◽  
Salt Solutions

Benzylamine Tartrate as an Organic Glass Substrate for Carbon Films by Evaporation

1970 ◽  
Vol 28 ◽  
pp. 484-485
Author(s):  
A. C. Faberge
Keyword(s):  
Vapor Pressure ◽  
Viscous Liquid ◽  
Glass Substrate ◽  
Room Temperature ◽  
Carbon Film ◽  
Carbon Films ◽  
Organic Glass ◽  
Spectroscopic Examination ◽  
Polymeric Substrates

Benzylamine tartrate (m.p. 63°C) seems to be a better and more convenient substrate for making carbon films than any of those previously proposed. Using it in the manner described, it is easy consistently to make batches of specimen grids as open as 200 mesh with no broken squares, and without individual handling of the grids. Benzylamine tartrate (hereafter called B.T.) is a viscous liquid when molten, which sets to a glass. Unlike polymeric substrates it does not swell before dissolving; such swelling of the substrate seems to be a principal cause of breakage of carbon film. Mass spectroscopic examination indicates a vapor pressure less than 10−9 Torr at room temperature.

Hydration Chamber for Jeolco 200 Kv Microscope

1970 ◽  
Vol 28 ◽  
pp. 542-543
Author(s):  
V. R. Matricardi ◽  
G. G. Hausner ◽  
D. F. Parsons
Keyword(s):  
Electron Microscope ◽  
Water Vapor ◽  
Vapor Pressure ◽  
Pressure Gradient ◽  
Room Temperature ◽  
List Type ◽  
Type Number ◽  
Equilibrium Vapor Pressure

In order to observe room temperature hydrated specimens in an electron microscope, the following conditions should be satisfied: The specimen should be surrounded by water vapor as close as possible to the equilibrium vapor pressure corresponding to the temperature of the specimen.The specimen grid should be inserted, focused and photo graphed in the shortest possible time in order to minimize dehydration.The full area of the specimen grid should be visible in order to minimize the number of changes of specimen required.There should be no pressure gradient across the grid so that specimens can be straddled across holes.Leakage of water vapor to the column should be minimized.

Vapor pressure of sea-salt solutions

1954 ◽  
Vol 35 (5) ◽  
pp. 722 ◽  
Author(s):  
A. B. Arons ◽  
C. F. Kientzler
Keyword(s):  
Vapor Pressure ◽  
Sea Salt ◽  
Salt Solutions

Chlor(trifluorphosphan)gold(I), eine einfache flüchtige Notizen: Goldverbindung/Chloro(trifluorophosphane)gold(I), a Simple Volatile Gold Compound

1992 ◽  
Vol 47 (4) ◽  
pp. 591-593 ◽  
Author(s):  
Werner Fuß ◽  
Martin Rühe
Keyword(s):  
Vapor Pressure ◽  
Mass Spectra ◽  
Room Temperature ◽  
Gold Compound

(PF3)AuCl was prepared from PF3 and Au2Cl6 in SOCl2 as a solvent. It is more stable than the analogous CO complex. It has a vapor pressure of about 10-4 mbar at room temperature. Its IR , NMR and mass spectra are reported.

Strength of Neoprene Compounds and the Effect of Salt Solutions

1983 ◽  
Vol 56 (4) ◽  
pp. 845-852 ◽  
Author(s):  
A. K. Bhowmick ◽  
A. N. Gent
Keyword(s):  
Tensile Strength ◽  
Lower Limit ◽  
Low Temperatures ◽  
Environmental Effect ◽  
Room Temperature ◽  
Characteristic Temperature ◽  
Salt Solutions ◽  
A Value ◽  
Fecl3 Solution ◽  
Tear Propagation

Abstract Soft CR vulcanizates resemble NR vulcanizates in many ways. Their tensile strength is high at low temperatures and drops sharply at a characteristic temperature to a value of about 1–1.5 MPa. Their tear resistance decreases smoothly as the temperature is raised and does not reach a lower limit, even at temperatures as high as 150°C. However, they show continuous tear propagation at room temperature under relatively large tear forces, whereas NR materials do not. This difference must reflect different strengths of the crystallites formed at the tear tip, those in CR being significantly weaker. Also, a specific environmental effect is noted: When immersed in solutions of FeCl3, the CR materials show more rapid tearing, and they tear at significantly lower forces than in water or in NaCl solutions (or in air). Although they swell continuously in water and in salt solutions, the rate of swelling seems far too low to account for the weakening observed. Moreover, the swelling is greater in water, whereas the weakening is specific to FeCl3 solution. It is attributed to a chemical reaction between FeCl3 and the CR molecule.

scholarly journals STUDIES IN AGGLUTINATION

1924 ◽  
Vol 39 (2) ◽  
pp. 245-263 ◽  
Author(s):  
Gerald S. Shibley
Keyword(s):  
Room Temperature ◽  
Cohesive Force ◽  
Salt Solutions

1. The spontaneous agglutination of streptococci has been studied. 2. This spontaneous agglutination would seem to be caused by the presence of a bacterial cohesive force higher than that usually found when bacteria are suspended in salt solutions of the concentration commonly employed as electrolyte in specific agglutination reactions. 3. Many granular autoagglutinating strains of streptococcus may be made diffuse by growth at room temperature (17–23°C.) and then lose their tendency to agglutinate spontaneously. 4. All factors that reduce cohesive force or that make the repelling force relatively greater than the cohesive force make for stable suspensions. 5. Methods for management of the specific agglutination of refractory autoagglutinating strains of streptococci have been presented.

CONTRIBUTION TO THE STUDY OF THE PRECIPITATION OF CHROMATES

1938 ◽  
Vol 16b (2) ◽  
pp. 37-45 ◽  
Author(s):  
P. E. Pelletier ◽  
L. Cloutier ◽  
Paul E. Gagnon
Keyword(s):  
Room Temperature ◽  
Chromium Trioxide ◽  
Potassium Chromate ◽  
Salt Solutions ◽  
Copper Salts ◽  
Metallic Salt

A study was made of the precipitation of the chromates of copper, cadmium, cobalt, zinc, and iron at room temperature. The concentration of the reacting metallic salt solutions was kept constant, and that of the potassium chromate solutions was varied regularly. Solutions were mixed in less than one-tenth of a second, and the rate of mixing was accurately determined. The ratio of oxide to chromium trioxide was found by analysis for chromium trioxide and the metal on the same portion of the precipitate. If the ratio remained constant with varying concentrations of reactants, a definite compound was indicated. The composition of the precipitates obtained with copper salts approached that of the normal chromate. Cadmium and cobaltous salts always gave normal chromates. Zinc and ferric salts yielded only basic mixtures.

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