Radiation compatibility

Uses Fungicide, algicide, biocide for exterior paints, coatings, caulks, stucco, acrylic, vinyl-acrylic, or polyvinyl acetate latexes Features Broad spectrum nonleaching noncorrosive to metals stable to radiation compat. with latex polymers contg. zinc oxide Properties Off-wh. aq. disp. si. odor sp.gr. 0.95 f.p. -5 C Use Level 5-20 lb/100 gal (exterior paint)... 

Radiation compatibility n. The ability of a plastic to maintain its properties when exposed to X-ray, gamma, electron, or other ionizing radiation. 

PCTFE plastic is compatible withHquid oxygen, remains ductile at cryogenic temperatures (16—22), and retains its properties when exposed to either uv or gamma radiation. PCTFE exhibits a refractive iadex of 1.43 (ASTM D542) and an amorphous sheet can provide over 90% transmittance. 

Alkylated aromatics have excellent low temperature fluidity and low pour points. The viscosity indexes are lower than most mineral oils. These materials are less volatile than comparably viscous mineral oils, and more stable to high temperatures, hydrolysis, and nuclear radiation. Oxidation stabihty depends strongly on the stmcture of the alkyl groups (10). However it is difficult to incorporate inhibitors and the lubrication properties of specific stmctures maybe poor. The alkylated aromatics also are compatible with mineral oils and systems designed for mineral oils (see Benzene Toulene Xylenes and ethylbenzene). ... 

Sample requirements Vacuum-compatible solids must be able to absorb ultraviolet radiation... 

A general requirement for LIMS analysis is that the material must be vacuum compatible and able to absorb UV laser radiation. With regard to the latter require-... 

An effective method of NVF chemical modification is graft copolymerization [34,35]. This reaction is initiated by free radicals of the cellulose molecule. The cellulose is treated with an aqueous solution with selected ions and is exposed to a high-energy radiation. Then, the cellulose molecule cracks and radicals are formed. Afterwards, the radical sites of the cellulose are treated with a suitable solution (compatible with the polymer matrix), for example vinyl monomer [35] acrylonitrile [34], methyl methacrylate [47], polystyrene [41]. The resulting copolymer possesses properties characteristic of both fibrous cellulose and grafted polymer. 

For the EPDM/NR joint, the modification of the EPDM rubber increases its cure compatibility with NR. This, thus, increases with radiation dose up to 50 kGy beyond which a drop in the absorbance values due to predominant chain scission of the rubber also lowers the bond strength. Besides, interdiffusion of the mbber molecules across the interface also contributes to the formation of the bond. 

In HSCT, very high doses of chemotherapy with or without total-body radiation (TBI) are given in an attempt to potentiate leukemia cell kill. Hematopoiesis is restored by the infusion of stem cells harvested from an HLA-compatible donor, thereby rescuing the patient from the consequences of total aplasia.13 It is the most effective antileukemic therapy currently available. 

For use from the size press it is necessary for the FBA to be compatible with the chosen size, such as starch, casein or urea-formaldehyde resin. Since sizes tend to be yellowish and to absorb ultraviolet radiation, brighteners are generally less effective in sized paper. 

Numerous reactions in organic synthesis can be achieved under solid-liquid PTC and with microwave irradiation in the absence of solvent, generally under normal pressure in open vessels. Increased amounts of reactants can be used to ensure better compatibility between the in-depth penetrability of materials and the radiation wavelength. 

SOI Silicon on Insulator material is today s most advanced Silicon-based substrate technology it is basically Silicon material with an integrated insulation layer underneath a single crystal Si layer. It combines most of the advantages of the most well established Silicon technology with high radiation, media and temperature compatibility. 

An ELSD converts the HPLC eluent into a particle stream and measures the scattered radiation. It offers universal detection for nonvolatile or semivolatile compounds and has higher sensitivity than the RI detector (in the low ng range) in addition to being compatible with gradient analysis. ELSD is routinely used in combinatorial screening. Response factors are less variable than that of other detectors. An ELSD consists of a nebulizer equipped with a constant temperature drift tube where a counter-current of heated air or nitrogen reduces the HPLC eluent into a fine stream of analyte particles. A laser or a polychromatic beam intersects the particle stream, and the scattered radiation is amplified by a photomultiplier. Manufacturers include Alltech, Polymer Laboratories, Shimadzu, Waters, Sedere, and ESA. 

The polymerization of 4-methoxystyrene (MeOSt) by ionizing radiations at 20 °C in CH2C12 is reported briefly by Deffieux et al. (1980). Because this monomer resembles the VE in its polarity, one expects it to resemble these monomers in its polymerization behaviour. Indeed, as Figure 11 shows, the drop in rate, RB/Rom, between m = raB and the arbitrarily chosen m = 0.8mB is 4.3, and for EVE it is 2.5. There is no obvious inflection signalling the change of mechanism as there is for EVE, but the scanty points are certainly compatible with one. The behaviour is markedly different from that of styrene. 

The properties of polymer materials can e greatly extended by blending two or more homopolymers together. Blends may be classified as compatible or incompatible - although this does depend on the dimensions being considered. Compatibility is influenced by the molecular weight of the homopolymers and is enhanced in practice by incorporation of block copolymers and other compatibilizers. The effects of radiation on blends depend on the degree of compatibility and the extent of inter-molecular interaction (physically and chemically) between the different types of homopolymers. 

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