Smoke agents

Beta-blockers interact with a large number of other medications. The combination of beta-blockers with calcium antagonists should be avoided, given the risk for hypotension and cardiac arrhythmias. Cimetidine, hydralazine, and alcohol all increase blood levels of beta-blockers, whereas rifampicin decreases their concentrations. Beta-blockers may increase blood levels of phenothiazines and other neuroleptics, clonidine, phen-ytoin, anesthetics, lidocaine, epinephrine, monoamine oxidase inhibitors and other antidepressants, benzodiazepines, and thyroxine. Beta-blockers decrease the effects of insulin and oral hypoglycemic agents. Smoking, oral contraceptives, carbamazepine, and nonsteroidal anti-inflammatory analgesics decrease the effects of beta-blockers (Coffey, 1990). 

Evaluation of certain food additives some food colours, thickening agents, smoke condensates, and certain other substances (Nineteenth report of the Joint FAOA/VHO Expert Committee on Food Additives). FAO Nutrition Meetings Series, No. 55, 1975 WHO Technical Report Series, No. 576, 1975. 

Among the duties of the Assistant Secretary of War was the approval of "shopping lists for the various supply arms and services. On 9 December 1921 the Assistant Secretary approved such a list for the CWS. Included were toxic agents, smoke materials, cloud gas materials, and chemical engineering equipment. Several reviews of the "List of Supplies to be Procured by the Chemical Warfare Service were made in the various categories in the 1920 s and 1930 s, but no substantial changes were effected. The Army supply list served a double purpose—it was a partial list of materials required by CWS for manufacture of its requirements and it was also the authorized procurement list of CWS for procurement planning purposes. ... 

From 1937 onward all industrial mobilization planning was based on the manpower requirements of the Protective Mobilization Plan (PMP). The PMP called for an army of 400,000, within 30 days after mobilization, known as the Initial Protective Force and made up of the Regular Army and the National Guard. Within 4 months, the number would be raised to 1,000,000 men and within 14 months to a peak wartime figure of 4,000,000. The CWS planned for both units and facilities under the PMP and estimated the time it would require to furnish the mobilized forces with critical and essential items, such as gas masks, toxic agents, smoke, munitions, impregnite, airplane spray tanks, and shells for 4.2-inch chemical mortars. ... 

Gut Rubber. To produce cut mbber thread, smoked mbber sheet or crepe mbber is milled with vulcanizing agents, stabilizers, and pigments. This milled stock is calendered into sheets 0.3—1.3 mm thickness, depending on the final size of the mbber thread desired. Multiple sheets are layered, heat-treated to vulcanize, then sHt into threads for textile uses (Fig. 2). Individual threads have either square or rectangular cross-sections. 

At this writing anticholinergic agents are not widely used for the symptomatic treatment of asthma, although compounds such as atropine [51 -55-8] C17H23NO3, (18) have been used for centuries (111). Inhalation of the smoke produced by burning herbal mixtures, such as Datura Stramonium provided bronchodilation and rehef from some of the symptoms of asthma. The major active component in these preparations was atropine or other closely related alkaloids (qv). 

A solution of sulfur trioxide [7446-11-9] dissolved in chlorosulfonic acid [7990-94-5] CISO H, has been used as a smoke (U.S. designation FS) but it is not a U.S. standard agent (see Chlorosulfuric acid Sulfuric acid and sulfur trioxide). When FS is atomized in air, the sulfur trioxide evaporates from the small droplets and reacts with atmospheric moisture to form sulfuric acid vapor. This vapor condenses into minute droplets that form a dense white cloud. FS produces its effect almost instantaneously upon mechanical atomization into the atmosphere, except at very low temperatures. At such temperatures, the small amount of moisture normally present in the atmosphere, requires that FS be thermally generated with the addition of steam to be effective. FS can be used as a fill for artillery and mortar shells and bombs and can be effectively dispersed from low performance aircraft spray tanks. FS is both corrosive and toxic in the presence of moisture, which imposes limitations on its storage, handling, and use. 

Chlorosulfuric acid is miscible with sulfur trioxide, sulfuric acid, and pyrosulfuryl chloride in all proportions. Mixtures with sulfur trioxide are used as smoke-forming agents. The properties of such mixtures have been described (3,15,16). Mixtures of chlorosulfuric acid and pyrosulfuryl chloride form an a2eotrope when distilled (17). 

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