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Barriers radiation

Microbial barrier Chemical barrier Radiation barrier Thermal barrier Electrical barrier Reception of external stimuli Tactile (pressure)... [Pg.194]

Devices and machines used to control pests or alter their environment are called mechanical controls. Traps, screens, barriers, radiation, and electricity can sometimes be used to prevent the spread of pests or reduce an infestation. Lights, heat, and refrigeration can alter the environment sufficiently to suppress or eradicate some pest populations. [Pg.71]

Lemercier, V, Millot, X, Ansoborlo, E., et al., 2003. Study of uranium transfer across the blood-4 rain barrier. Radiat. Prot. Dosim. 105, 243-245. [Pg.458]

Induction electron accelerators - betatrons- are widely used as radiation sources in industrial flaw detection of materials and articles of high thickness. However, relatively low radiation intensity has become the barrier for the most wider betatron use in this area. For the efficiencyincrease of radiation control method of articles, as well as for the possibility to control materials and articles of the most thickness the significant increase of betatron radiation intensity has been required. [Pg.513]

When a sound wave comes in contact with a soHd stmcture, such as a wall between two spaces, some of the sound energy is transmitted from the vibrating air particles into the stmcture causing it to vibrate. The vibrating stmcture, in turn, transmits some of its vibrational energy into the air particles immediately adjacent on the opposite side, thereby radiating sound to the adjacent space. For an incomplete barrier, such as a fence or open-plan office screen, sound also diffracts over the top and around the ends of the barrier. The subject of this section is confined to complete barriers that provide complete physical separation of two adjacent spaces. Procedures for estimating the acoustical performance of partial barriers can be found in References 5 and 7. [Pg.315]

Isolation of radioactive wastes for long periods to allow adequate decay is sought by the use of multiple barriers. These include the waste form itself, the primary containers made of resistant materials, overpacks as secondary layers, buffer materials, concrete vaults, and finally the host rock or sod. Barriers limit water access to the waste and minimize contamination of water suppHes. The length of time wastes must remain secure is dependent on the regulatory limit of the maximum radiation exposure of individuals in the vicinity of the disposal site. [Pg.230]

When reactor-grade plutonium is left in spent fuel, the large size of the fuel assembhes and the lethal radiation fields make it extremely difficult to divert the material covertly. Once the reactor-grade plutonium is separated in the commercial reprocessing option, however, the radiation barrier is almost eliminated, and in certain steps of the process the plutonium is in powder or Hquid form, which is much more easily diverted than large, bulky fuel... [Pg.242]

Parts made from fluoroelastomers ate used ia appHcations that justify their high cost, usually where the maintenance and replacement costs are high enough to offset the initial cost of the part. These include automotive appHcations such as valve stem seals, fuel injector components, radiator, crankcase and transmission seals, and carburetor needle tips. Numerous seals and gaskets in the marine, oilfield, and chemical processing industries employ fluoroelastomers. In addition, many hoses in the automotive and chemical industry are made entirely of fluoroelastomer compounds or have a veneer of the fluoroelastomer as a barrier exposed to the harsh environment. Seals and gaskets in military appHcations and the binder for flares and missile appHcations ate made with fluoroelastomers. [Pg.234]

A muffle is an impenetrable ceramic or metal barrier between the firing chamber and the interior of the furnace. It heats the process charge by radiation and furnace atmosphere convection. [Pg.2404]

In calculating the system and barrier failures, consideration should be given to radiation embrittlement, chemical reactions, thermal shock, and metal fatigue. [Pg.310]

Ethylene-vinyl acetate EVAs (in the polyolefin family) have exceptional barrier properties, good clarity and gloss, stress-crack resistance, low temperature toughness/retains flexibility, adhesion, resistance to UV radiation, etc. They have low resistance to heat and solvents. [Pg.427]

Exposure to UVB radiation has a profound effect on the corneal endothelium. Following exposure to UV radiation, the cornea swells, the extent and duration of which is directly related to the magnitude and duration of the exposure (Riley etal., 1987). At very high in vivo exposures, these authors reported a decrease in ascorbate concentration and an increase in protein content, which they suggested resulted from a breakdown of the blood-aqueous barrier. They concluded that UV radiation may cause or promote changes in the endothelium associated with ageing. [Pg.129]

Impaired mucosal integrity Breaks in the protective barrier allows fungal invasion often due to radiation, surgery, or mucositis... [Pg.1205]

The adhesive was developed for application to seal food containers with alumina foils and to seal glass plates. In this case, the vinyl polymerization step can be carried out by UV light radiation through the already mounted glass plates with a photoactive radical initiator to cure the viscous adhesive material. Another application of this material is the development of diffusion barrier containing protective coatings on medieval stained glasses (31). [Pg.339]


See other pages where Barriers radiation is mentioned: [Pg.102]    [Pg.102]    [Pg.1586]    [Pg.105]    [Pg.313]    [Pg.331]    [Pg.236]    [Pg.236]    [Pg.545]    [Pg.155]    [Pg.430]    [Pg.409]    [Pg.121]    [Pg.377]    [Pg.2026]    [Pg.500]    [Pg.644]    [Pg.700]    [Pg.204]    [Pg.10]    [Pg.10]    [Pg.56]    [Pg.63]    [Pg.127]    [Pg.582]    [Pg.677]    [Pg.791]    [Pg.797]    [Pg.405]    [Pg.3]    [Pg.492]    [Pg.309]    [Pg.775]    [Pg.16]    [Pg.153]    [Pg.201]    [Pg.202]    [Pg.57]   
See also in sourсe #XX -- [ Pg.312 ]




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