surface-enhanced resonance raman scattering from water-soluble porphyrins adsorbed on a silver electrode

resonance raman (rr) and surface-enhanced resonance raman (serr) spectroscopy have been used to study two water-soluble porphyrins, tetrasodium meso-tetrakis(4-sulfonatophenyl) porphine(tspp) and meso-tetrakis(4-carboxyphenyl)porphine (tcpp) both compounds were found to adsorb spontaneously at a silver electrode and exhibit intense serr s..

transfer of chemicals from clothing to skin

several techniques have been investigated for studying the transfer to skin of chemicals from a durable press finish on cotton-containing fabric, under normal wearing conditions. using flameless atomic absorption spectroscopy, it has been found that the transfer of solid resin to skin was below the sensitivity of the technique (less than ..

cathodic e-coat improves farm implement finish

international harvester (ih) has installed cathodic electrocoating (e-coat) at its sprawling plant to improve the finish quality on selected production piece parts for control centers (cabs) on tractors, combines and cotton pickers. the extremely tough nature of the black acrylic e-coat film allows ih to use it as a one-coat system on sel..

simplified asme acceptance test procedure for steam turbines

the simplified turbine acceptance test measures high pressure feedwater flow directly. combined with a small number of other high-accuracy measurements, it helps determine if a turbine has met its performance guarantee. the accuracy of the simplified method is such that measuring tolerances should not be applied to the test results. subst..

empirical relationship between polymer structure and relative toxicity of off-gases

an empirical relationship appears to exist between the chemical structure of a polymer and the relative toxicity of the off-gases produced under a specified set of test conditions. similarities in animal response times are demonstrated between grossly different but chemically similar materials such as polyethylene and cooking oil, and suc..

numerical simulation results in the carthage (cotton valley) field

numerical simulation results for two cotton valley wells are presented. a three-dimensional, radial, dry gas model was used to simulate multiple layer, very low permeability reservoirs. examples of inputs and modifications to the model from various tests and techniques are presented. these include the use of radioactive sand tracers durin..

application of new well logs and geology to fracturing and producibility in tight gas sands, cotton valley group

a combination of new tools, the digital sonic and the induced gamma-ray spectroscopy (gst) with the high resolution dipmeter (hdt), a saraband suite of logs, and a rock core study provided a unique opportunity to re-examine fracturing (fracing) procedures and producibility in the $left double quote$ tight gas sands $right double quote$ of..

wind assisted deep-well pumping

a 37-kw, vertical-axis wind turbine was successfully coupled to an existing irrigation pump by installing a combination gear drive between the pump and electric motor. the system operated as a wind-assisted system because the wind turbine reduced the load on the electric motor and saved energy. to synchronize the two power sources, an ove..

fluidized-bed combustion and gasification of biomass

fluidized-bed energy technology offers several unique characteristics for using biomass in small-scale energy conversion operations. this paper reports on a study undertaken to evaluate two fluidized-bed energy conversion methods using agricultural biomass - direct combustion and gasification. a 0. 61 meter diameter fluidized-bed combusti..

burning behavior of upholstered furniture mockups

furniture mockups consisting of various arrangements of full-size cushions were tested in the nbs furniture calorimeter measurements included heat release, combustion product concentrations, and flame spread characteristics. major variations in burning were observed: neoprene mockups only smoldered, flame retardant treated polyurethane mo..