Cotton gauze

Absorbent cotton gauze Absorbent wound dressing Any method... 

Calculate the radius of a spherical pile of cotton gauze saturated with cottonseed oil to cause ignition in an environment with an air temperature ( /],) of 35 °C and 100 °C. Assume perfect heat transfer between the gauze surface and the air. The gauze was found to follow the Frank-Kamenetskii ignition model, i.e. 

DRESSING BURN 24X36 INCHES STERILE ABSORBENT COTTON GAUZE 15S 6510011532S57 PG 104,57 ... 

Na2S04, anhydrous 25 Erlenmeyer flasks, 2 L, four baffles 5 Erlenmeyer flasks, 500 mL, one baffle 1 Erlenmeyer flask, 1 L cotton gauze... 

Nonocclusive dressings such as cotton gauze or cotton underwear may be used in the management of skin reactions. 

It is obvious that close examination of each specimen poured by the operator is essential to prevent such an occurrence. Should a sample show a clotting tendency, enough usable sample may be obtained by pouring the sample into the cup through cotton gauze or other open mesh filter device. 

Acute dermal toxicity tests are an important method employed in assessing the safety of insecticides to workers. For dermal toxicity tests, typically, an albino rabbit weighing 2-3 kg is shaved around the abdomen and back, and the chemical in question is painted (dry power is moistened with isotonic saline to prepare a paste) over the area, which is then covered with either a rubber sleeve or cotton gauze held in place with a wire screen for up to 24 hr. The mortality is recorded and the median lethal dose obtained is referred to as dermal LD3(). 

Wet wipe sampling is generally not recommended for carpet, upholstery and other fabric-covered or soft surfaces because the solvent may be absorbed into the surface being sampled. Wipes of soft surfaces also are less likely than wipes of hard surfaces to reflect the dermal exposure potential (Ness, 1994). However, Lu and Fenske (1999) recently reported the use of cotton gauze wetted by misting with distilled water to wipe carpets freshly treated with a chlorpyrifos formulation (Dursban L.O.) and found it to be 23 to 24 times more efficient than transfer to dry palm presses. 

In conducting studies to determine temporal decay rates, sampled areas should be identified so that the same areas are not re-sampled pre-application and post-application. Likewise, if deposition coupons (e.g. a-cellulose filter paper or cotton gauze patches backed with aluminum foil) are placed on the floor during application of the pesticide formulation to estimate initial deposition rates, care should be exercised to avoid sampling in the areas covered by the coupons during subsequent monitoring visits. 

In the first test, conducted in July under hot and relatively dry conditions, the grass was cut to 5 cm and raked prior to application of the chlorpyrifos/ chlorothalonil mixture. Deposition rates were determined by strategic placement of 10-cm X 10-cm cotton gauze coupons backed with aluminum foil. The test plot was allowed to dry for 4 h before sampling. The mean transfer efficiencies for chlorpyrifos were 2.37 ng/m (0.087%) for the PUF roller and 1.05 ng/m (0.039%) for the drag sled. The transfer efficiencies were much higher for... 

Table 3.6 Hand-wipe removal efficiencies for dried residues by wetted cotton gauze sponges (mean standard deviation %)) ...

Saliva is rzuely used in any species but the horse. Collection is generally adiieved by the use of gauze swabs held in long forceps. Yields rarely exceed 5 g Mid are often mudi less. It is essential that only cotton gauze is used for this purpose as certain synthetic fibres contain compounds that may interfere in thin-layer chromatography. 

T. spiralis infective muscle larvae were obtained from mouse carcases (3 months following infection) with the use of pepsin-HCl digestion (Gould 1970). The larvae were separated from undigested particles of host tissues by passing through three layers of cotton gauze, followed by repeated sedimentation in phosphate-buffered saline (PBS). 

Recently, Marshall and van Staden [45] described a gas expansion separator used for FI hydride generation AAS which is separated into two compartments by a cotton gauze membrane. The reaction mixture is allowed to flow on the membrane from the top compartment, where a flow of argon gas is directed parallel to the membrane to sweep the hydrogen and hydrides into a quartz atomizer, while the liquid phase is pumped out from the base of the lower compartment (cf. Sec. 5.5.1). 

Preparation of Samples for Analysis. The cotton gauze pads, both garment and respirator, were prepared for analysis by halving the pads diagonally resulting In a 51.61 cm and a 19.35 cm sample, respectively. The urine samples were thawed and duplicate aliquots of 5 or 10 ml were removed for analysis. 

Analysis for Mancozeb. Residues of mancozeb on the cotton gauze pads (garment or respirator), cotton gloves and urine were determined by means of the Keppel procedure (. Using this analytical... 

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