Suspended particulates

De Pinto [90] measured the rate at which available phosphorus is released from various types of particulates suspended in lake water. The equipment consists of two culture vessels separated by a thin membrane filter, thus facilitating the separation of two particulate suspensions, while at the same time permitting their interaction by diffusion of solutes through the membrane. 

Particulate-bound CDDs are removed by wet or dry deposition with an atmospheric lifetime 10 days (Atkinson 1991) and, to a lesser extent, by photolysis. Miller et al. (1987) measured photolysis of 2,3,7,8-TCDD sorbed onto small-diameter fly ash particulates suspended in air. The results indicated that fly ash confers photostability to the adsorbed 2,3,7,8-TCDD. The authors reported little (8%) to no loss of 2,3,7,8-TCDD on the fly ash samples after 40 hours of illumination in simulated sunlight. 

The flow-induced destruction of networks of both near-spherical and rodlike particulates suspended in polymer matrices can be reversed with time in quiescent conditions. It is of limited interest, since it may take hours, which will cause thermal degradation. Larson (90)... 

LC50 (lethal concentration 50%). That quantity of a substance administered by inhalation that is necessary to kill 50% of test animals exposed to it within a specified time. The test applies not only to gases and vapors but to fumes, dusts, and other particulates suspended in air. 

The efficiency of currently used techniques for the removal of particulates from gases drops off sharply if the particle size becomes smaller than 1 nm (Figure 362). On the other hand, the human pulmonary system is most efficient in absorbing and retaining particles in the micrometer and submicrometer range. These particles are then the primary cause of respiratory ailments. " While such suspended particles in emissions from, for example, stacks of power plants are invisible, measurements have revealed that approximately 50 o of the particulates suspended in the air of urban regions are smaller than 1 fim. 

Groundwater from deep wells typically contains particulates, suspended solids and dissolved solids, especially iron or hardness. 

Dust Dust and small particulates suspended in the air Woodworking, buffing, and general dusty conditions... 

Immediately after the interaction, debris was collected. The debris consisted of fine particulate suspended in the water and larger debris particles on the bottom of the chamber. The debris was subjected to a variety of analytical schemes that included scanning electron microscopy, x-ray diffraction, and photographic microscopy. 

Like other chemicals, organochlorines occur in seawater in a continuum of dissolved, colloidal and discrete particulate forms Gustafsson and Gschwend, 1997). Operationally, dissolved and particulate suspended forms may be distinguished on the basis of separation techniques such as filtration or centrifugation. Ihe separation may depend on size and density of the particles it may also depend on the composition of the suspension. For instance, particles smaller than the nominal filter pore size are retained on a clogged filter. 

The formation of a true copolymer was disputed as polyacetylene particulates suspended in solution by dissolved polymer, such as polystyrene, were also found to form stable latex particles [58]. In order to... 

Chem. Descrip. Microcrystalline cellulose and cellulose gum USP/NF CAS 9004-34-6 9004-32-4 EINECS/ELINCS 232-674-9 Uses Fat replacement, mouthfeel enhancer in foods stabilizer in low-fat emulsions foam stabilizer, ice crystal growth control agent, syneresis inhibitor, vise, builder, opacifier, particulate suspending agent in frozen desserts, whipped toppings excipient, vehicle, vise, control agent, thixotrope for pharmaceutical suspensions and emulsions... 

In their liquid-liquid separation duty, the tubular bowl centrifuges can operate without stopping, but there is always a small amount of solid particulate suspended in the liquids, which is denser than either, and so settles to the bowl wall, where it stays until the centrifuge operation is stopped, and the machine is dismantled for manual cleaning. 

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