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1544 results. per page « 3 4 5 6 7 8 9 10 11 12 13 »

Ultra-thin porous silicon oxide layer

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Ultra-thin powder coatings

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Development allows use of coatings no more than 20µm thick. Table compares properties of conventional and new (UDS) powders. Significant cost reductions can be achieved.

Ultra-thin, ultra-hard electroless nickel in space applications

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Note on use of 9 to 12% phosphorus EN for valve couplings in ISS (International Space Station) with hardness > HCR 68, mainly as composite incorporating fluorocarbons, ptfe etc.

Ultra-violet curable paints & coatings: practical application of quantum mechanics

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Simple discussion of radiation & radical initiation chemistry, energy as function of wavelength, use of uv reflectors to increase local intensity (table lists materials & their reflectance). First & second surface reflectance, Beers Law & coating performances are discussed. Tables show salt spray corrosion for phosphated & non-phosphated panels, scribed or not & field rating schemes are set out. 12 refs

Ultra-violet curable powder coatings; marriage of two compliant technologies

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Reviews markets and application areas for powder, traces efforts to develop low temperature thermoset powders & development of uv-cure powders, then going on to survey prospective application areas for these, incl. plastics, wood (and MDF) and metals & alloys, incl. aluminium & magnesium automotive wheels. The very short cycle times of uv cure are extolled. 13 refs

Ultra-violet curing coating composition for cans

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UV-curing composition for cans comprises cation-polymerizable compound; combination of oxetane compounds; cationic initiator which generates cation when irradiated with UV rays; and lubricity imparting agent.

Ultra-violet lamps for paint curing

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Comment on manufacture of uv lamps and special features of importance.

Ultra-Violet Light & Hydrogen Peroxide to Treat Photoprocessing Effluents

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Ultra-violet light cleaning of silicon wafers

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Brief note on alternative to RCA-Clean process which avoids use of water or solvents.

Ultra-Violet Light for Destruction of Organic Species in Effluents

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Use & benefits of title method are described. Rising costs of electricity, clean water & effluent discharge are plotted. Basic principles are explained & process flowsheets are shown for rinse water treatment, treatment of semi-aqueous cleaning effluent & that from aqueous cleaning plant. Efficient use of fresh and rinse water in a dual circuit is shown. Combined use of u.v and membrane process, e.g ultrafiltration, is shown.

Ultra-violet light for rainwater purification

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Usefulness and limitations of title approach are set out.

Ultra-Violet Light Irradiation of Unpressurised Water

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Ultra-violet oxidation of groundwater, landfill leachate and industrial effluent

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UV oxidation mimics nature & can be used to treat organics such as chlorinated organics, aromatics & polycyclic hydrocarbons, also inorganic species, cyanide, nitrite, hydrazine by addition of oxidants such as ozone or hydrogen peroxide. General application areas are suggested.

Ultra-Violet Pretreatment for Metallising of Resin Moulded Plastics

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UV of 300 nm of less is used for 20 sec to 10 min.

Ultra-Violet Radiation for Effluent Treatment

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Report on use of u.v light combined with oxidising agent (hydrogen peroxide) to destroy organic contaminants in groundwater or soil, esp. chlorocarbons. Absorption & emission spectra are shown for major species and u.v lamp, process flowsheet is given and kinetics are offered with chemical equations of the reactions. 2 refs.