Smoke split

The point where the laminar air stream diverges into two parts is known as the smoke split. ... 

In addition to the convertible Type A cabinet used in the Type B mode, there are two additional versions of the Class II Type B cabinet. These units differ from the Type A and B3 units mainly in the airflow velocities and proportion of air recirculated, as well as in certain other performance specifications. Class II Type B1 cabinetry allows a little more flexibility in working with volatile, toxic, or radioactive substances, since its exhaust is connected to an exhaust duct that exhausts the cabinet air directly outside the building (Figure 9.6). Because 70 percent of the circulating air in the cabinet is exhausted to the outdoors, most nonexplosive or nonflammable chemicals may be used safely in low concentrations. Microgram quantities of toxic, carcinogenic, or radioactive compounds may be handled in the Class II Type B1 cabinet, provided that the work is performed in the direct exhaust portion (behind the smoke split) of the work surface. 

The largest RYUSEI rocket is said to be 18 m in length and weighs around 40 kg (sic). Built in three sections the head or payload section holds sequential fireworks and smoke dragons attached externally, while the combustion chamber is made from split pine logs, gouged out and then re-assembled to make a cylinder. 

Firefighters have to be able to read, understand, and act on complex written materials—not only fire law and fire procedures, but also scientific materials about fire, combustible materials, and chemicals. They have to be able to think clearly and independently because lives depend on decisions they make in a split second. They have to be able to do enough math to read and understand pressure gauges, or estimate the height of a building and the amount of hose needed to reach the third floor. They have to be able to read maps and floor plans so they can get to the emergency site quickly or find their way to an exit even in a smoke-filled building. 

The three sequences shown in Fig. 19 demonstrate that the decrease of the specific surface area is accompanied by a dramatic decrease in intensity of the spectra and by a drastic spectral simplification. In particular, all bands in the 2120-1100 cm interval, attributed to species formed at very reactive three-fold and four-fold coordinated oxygen sites located on edges and steps (O4J) and on corners (Of ) are strongly affected by sintering and are nearly totally absent on MgO smoke (Fig. 19c). A similar effect was discussed in Section III.C for the H2 adsorption and splitting on the same MgO samples (Fig. 11) and on the chemistry of CO adsorbed on Mg sites (spectral region not reported in Fig. 19) (12,26,177). 

The direct fire dryer consists of a bamboo grill platform where the split nuts are placed. Underneath is a fire hearth where coconut shells and husks are burned to provide heat for the vaporization of water from the kernels. The kernels shrink and are separated from the shells for further drying. Smoke from the burning fuel imparts a light brown color on the copra and its oil. 

Smoke Point. As oils or fats are heated, a thin bluish smoke appears. The smoke point is the lowest temperature, under controlled conditions, that the smoke becomes visible. Cottonseed oil s smoke, fire, and flash points, like other fats and oils, are almost entirely dependent on the free fatty acid content. Fats and oils smoke point results decrease when the triglycerides are split during hydrolysis to form free fatty acids and glycerol. The glycerol portion decomposes to form acrolein, which is the major portion of the smoke evolved from heated fats and oils. Like other long-chain fatty acid oils, cottonseed oil with 0.01% free fatty acid will have a smoke point of approximately 450°F. Additions of monoglycerides... 

Deutsch, L.J. and A.L. Jeffords Simnltaneons gas chromatographic nicotine/water analysis in smoke via split injection on dnal capillary colunms 48th Tobacco Chemists Research Conference, Program Booklet and Abstracts, Vol. 48, Paper No. 35, 1994, p. 45. 

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