Puff test

Many states now require lire suppression systems for public service stations and for some private fleet refueling facilities. Most of these systems are dry chemical using infrared detectors and work as effectively on methanol vehicle fires as gasoline vehicle fires. No special requirements are necessary for these systems when used at a methanol refueling facility. All fire suppression systems should be checked after installation for proper coverage using a fraction of the dry chemical that would normally be used (this is called a puff test ). The puff test not only shows the coverage that will be obtained, but tests the components of the fire protection system. 

Twenty-four subjects completed an 8-period balanced crossover study. For each subject, pharmacodynamic responses are taken at the test baseline, test 1 puff, test 4 puffs, reference baseline, reference 1 puff, and reference 4 puffs. A population model fit (Section 16.6.1.2) was conducted to describe the data. Responses at baseline were similar for both formulations, although they appeared to differ somewhat at 1 puff and 4 puffs. Overall, the profiles of the two formulations were judged as similar. 

Electrode-based measure of smoke pH of machine-smoked cigarettes Puff profiles of smokers, followed by yield measures based on Human Mimic Smoking Machine Plasma nicotine change from basehne measured comparing smokers of control and test cigarettes... 

Various meetings on urban diffusion models have been held in recent years. One was a symposium sponsored by the Environmental Protection Agency. Its f oceedings included studies of Gaussian plume and puff modeling techniques available in 1969. Each paper on a specific model gave some detail of the mathematical assumptions and the types of measurements that were used to test it. Several participants noted a... 

Following props(Ref 6) of dimeric acetone peroxide were deed at PicArsn action with match flame — a slight puff hrisance by sand test — 30.1 g sand crushed when 0.4 g of peroxide was initiated with 0.2 g MF, vs 48.0 g sand crushed by 0.4 g TNT impact sensitivity, BurMinesApp with 2 kg wt —... 

Tetranitroanili nobutanol nitrate is a powerful expl(Bal Mortar Test 117% TNT). When heated above its mp it deflagrated at 205— 10° with a brilliant puff without deton, when heated to 216° it ignited in 5 secs. Its Sensitivity to Impact is comparable to that of retry I(Ref 6). Fairly stable in storage and when heated to 100° when heated in a closed tube at 135° for 30 mins, it exploded. Loss of wt in the 75° International Test 0.1% Hygroscopicity Test at 90% RH and 25° gain in wt 0.06% and at 100% RH 0.19% (Refs 2 3). Its Qv 1250.6 keal/mol and... 

It is a mild expl when heated in a test tube it melts and decomp with a sudden puff and evoln of fumes when dropped on a red-hot plate it ignites immediately and burns with a yel flamefRef 2,pp 26-7). Its UV absorption spectra are described in... 

The nitrated deacetylated chitin was insol in w or acet but sol in a 1 1 mixt of the two. On heating in a test tube over an open flame, it decompd with a puff leaving a considerable amt of carbon residue... 

Among the important tests which are made on explosives are the determinations of their sensitivity to impact and to temperature, that is, of the distance through which a falling weight must drop upon them to cause them to explode or to inflame, and of the temperatures at which they inflame, explode, or puff spontaneously. At different places different machines and apparatus are used, and the numerical results differ in consequence from laboratory to laboratory. 

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