Interior application tests

Tests with Aerosol Sprays. One of the chief means of applying concentrated oil sprays is in aerosol form. An aerosol generally remains suspended in the air for some time and is carried by normal wind or air currents. Aerosols are probably best adapted to interior applications but have been used with some success outdoors. They may be produced by liquefied-gas formulations released through capillary nozzles, by steam and air atomization, by centrifugal disks and rotors, by extremely high pressure, and by heat vaporization. 

FMVSS 302 Pass/fail Horizontal sample exposed to gas flame inside test chamber and burning rate and distance measured Automotive interior applications... 

Except for Ultem, none of the materials is widely used for aircraft interior applications. They were tested in a cone calorimeter under differing heat flux levels. Several materials did not exhibit sustained ignition at 35 kW/m neither Vespel nor PBI ignited even at 50 kW/m. ... 

When the test flame application causes a distinct flash in the interior of the cup, observe and record the temperature of the sample as the fl p. Do not confuse the true flash with the bluish halo which sometimes surrounds the test Game at applications immediately preceding the actual flash... 

Initial studies on sulfonamides (114) were limited to qualitative assessment of the occurrence of sulfamerazine residues in muscle and interior organs of rainbow trout using Sarcina lutea (ATCC 9341) and Staphylococcus aureus (ATCC 6538P) as test organisms. The method involved application of fish fluids... 

For textile materials used as interior wall-coverings in U.K. buildings including railway carriages, where the fabric could be in a vertical orientation attached to the wall panel, measurement of rate of flame spread under external heat flux is one of the requirements. For such applications, the test method (BS 476 Part 7) essentially requires a vertically oriented specimen exposed to gas-fired radiant panel with incident heat flux of 32.5kW/m2 for lOmin. In addition, a pilot flame is applied at the bottom corner of the specimen for 1 min 30 s and rate of flame spread is measured. The same principle is used in the French test for carpets, NF P 92-506. 

Some attractive features of radiography are access to interior difficult-to-reach portion, such as valves and pipes, the objects or sample covered with insulation can be tested, reference radiographs can be accessed, the nature and severity of the attack can be assessed with ease, in principle, pit depths can be obtained although laser profilometry is the preferred method in this regard. The main drawback of the method is the whole sample needs to be exposed. Some applications of the method are determination of flaws in weldments and castings to identify sites of initiation of crevice corrosion, valve... 

Application and Principle This procedure is used to determine hemicellulase activity of preparations derived from A.J-pergillus niger var. The test is based on the enzymatic hydrolysis of the interior glucosidic bonds of a defined locust (carob) bean gum substrate at 40° and pH 4.5. Determine the corresponding reduction in substrate viscosity with a calibrated viscometer. 

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