Michael Tess

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The advance of materials chemistry has influenced the design of analytical sensors, especially those using spectroscopic or electrochemical methods for generating the signal. New methods of immobilizing enzymes, chromophores, and electron-transfer catalysts have resulted from initiatives in materials science. Systems based on sol-gel chemistry are(More)
An amperometric sensor consisting of a film of silica gel over an interdigitated microsensor electrode provided a humidity-independent response to CO over the range of 9%-76% humidity. The residual solvent contents were in the 20%-50% range, depending on the age of the gels and the humidity. Variations in this range did not change the sensitivity. Gaseous(More)
A high-resolution numerical simulation of jet breakup and spray formation from a complex diesel fuel injector at diesel engine type conditions has been performed. A full understanding of the primary atomization process in diesel fuel injection has not been achieved for several reasons including the difficulties accessing the optically dense region. Due to(More)
Oxidation of a variety of compounds, including methionine (Met), using a complex formed between dirhodium(II) acetate and the lacunary form of phosphotungstic acid as the catalyst is effective over a wide range of conditions, including pH 2-10. Thus, amperometric detection at a composite in which this complex is immobilized in a sol-gel material does not(More)
JP-8 sprays from a hydraulically actuated electronically controlled unit injector (HEUI) and a common rail injector (CRIN) were investigated to compare the effects of the fuel delivery system on the spray behavior of the fuel. The fuel pressurization method between injectors is fundamentally different. The HEUI system utilizes engine oil to pressurize the(More)
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