Water, glass point

Another nonregenerative drying appHcation for molecular sieves is their use as an adsorbent for water and solvent in dual-pane insulated glass windows. The molecular sieve is loaded into the spacer frame used to separate the panes. Once the window has been sealed, low hydrocarbon and water dew points are maintained within the enclosed space for the lifetime of the unit. Consequently, no condensation or fogging occurs within this space to cloud the window. 

Numerous substances that produced fluorescence were examined by Stokes plant extracts (e.g., chestnut rind, chlorophyll in water), glass, paper, animal material, uranium compounds, etc., and he pointed out that the rays produced by the fluorescence process were much more refrangible than the rays initiating them. ... 

Experiments.—(a) Acetyl chloride is added drop by drop to aniline. Accompanied by strong hissing, a vigorous reaction occurs which ceases as soon as an approximately equal volume of the chloride has been added. The liquid is cooled in water while five volumes of water are added. A copious precipitate of acetanilide is thrown down the amount can be increased by rubbing the walls of the vessel with a glass rod. The precipitate is filtered ofE and crystallised from a little hot water. Melting point 115°. 

Table I lists the comparative parameters for the various indochinite spectra. Two methods were used in preparing these samples. The first two samples listed were prepared by grinding the indochinite specimen and binding the powder with water glass. The other samples were sliced with a diamond saw. The two spectral lines are given with their position, width, height, and area. The quadrupole splitting and isomer shift are listed in the columns labeled QS and IS. (The isomer shift is really a combination of isomer shift and temperature-dependent shift, and the values are relative to iron in palladium.) The raw data points were fitted with a two-peak Lorentzian using an IBM 7094 least-squares fit.

Capillary Water.—Sorby3 pointed out that water kept m glass tubes of diameter ranging from 0-025 to 0-25 inch may easily be eooled to —5° C. without congelation, even when the tube is shaken. By keeping the tube quiet an even lower temperature may be obtained, as has been mentioned above. 

Experiment 141. — Add hydrochloric acid to a solution of sodium silicate — water glass. The gelatinous precipitate is silicic acid. Proceed from this point as in Exp. 140. 

Figure 2. Thus, the heat capacity results for collagen, elastin, and methyl cellulose confirm the dielectric results that a glass point of absorbed water occurs near 150°K.

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