Exterior water-cooling

In the case of photoinitiated polymerization, an oxygen-free aqueous solution of acrylamide with a concentration of about 50% mixed with a photosensibilizer and other required additives is passed through a column-type apparatus with exterior water-cooling. A thin layer of the solution is exposed to a mercury lamp, acquires the consistency of a plastic film, which then can be passed through a second exposure zone, and is crushed and dried. Acrylamide polymers produced by this method are easily soluble and have a low residual monomer content. 

Provide automatic sprinkler protection for induced-draft water-cooling towers where property damage and business interruption could result. In estimating the extent of possible damage, it should be remembered that the exterior and certain interior portions of the towers are normally dry and that whole towers as well as single cells of multicell towers may be taken out of service for repairs. 

In some cases in which it is desirable to cool the product before removal to the outside atmosphere, the discharge end of the cyhnder is provided with an additional extension, the exterior of which is water-spray-cooled. In cocurrent-flow calciners, hot gases from the interior of the heated portion of the cylinder are withdrawn through a special extraction tube. This tube extends centrally through the cooled section to prevent flow of gas near the cooled-shell surfaces and possible condensation. Frequently a separate cooler is used, isolated from the calciner by an air lock. 

After 45 min, remove the flask from the water bath and add 10 mL of distilled water. Then cool the flask by running water over its exterior. Stopper the flask and place it in a freezer for 30 min. This aids in the separation of the fat. 

Another area of active research is the development of paints that dry under extreme or unusual conditions including under water and on cool substrates. The latter allows the painting season for exterior coating to be extended, particularly in the northern states. 

Calorimetric Value is defined by Comer(Ref 3) as the value which is obtained by measuring the heat evolved when a propellant is burned in a bomb calorimeter contg an insert atmosphere. The temps are near 300° K. This value can also be calcd as shown in Ref 3,pp 127--8 Calorimetric Potential, Apparant (Potentiel calorimetrique, apparent in Fr). Tavernier (Ref 4,p 234) defines it as the quantity of heat evolved on the decompn of a proplnt, provided it does not do any exterior work (which means under const vol) and if the gases evolved in reaction are cooled (which means that the water is liquid). This value is, accdg to Tavernier, identical with the English value called "Calorific Value . A similar value was called by DePauw (Ref 1) "die Characteristik einer Substanz ... 

In the Watertown Arsenal method, the metal is melted in batch lots of the required weight in high-frequency induction furnaces and poured into a horizontally mounted mold rotating at 1300rpm while it is cooled on the outside with water. The mold is made of heavy cast iron and machined inside to the desired shape of the exterior of the gun to be produced. The finished casting has a hollow core and can be easily bored out to the desired internal diam of the gun(Ref 3)(See also Ref 2a)... 

Moisture Moderately high (hydrophobic plaster, cool, moist church) High (unheated cellar below ground water table, condensing sweat ) Moderate (exterior wall) to low (interior room) (heated room)... 

Radioxenon production in reactors is thought to arise from two pathways, first via xenon emitted from cracks in fuel rods, and secondly from fission of uranium on the exterior of fuel rods or in cooling water. Radioxenon released from medical isotope production comes... 

Cool the flask by running cold water over the exterior of the flask. 

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