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10. Biota participating in wastewater treatment in a horizontal flow constructed wetland.

Author

Vymazal, J., sladecek, V., and Stach, J.

Subjects
SEWAGE purification, CONSTRUCTED wetlands, BIOLOGICAL systems
Abstract

Investigates the biota participating in wastewater treatment in a horizontal flow constructed wetland. Survey focus on microscopical identification of organisms in both wastewater and filtration substrate; Use of the organisms as an indication of oxygen conditions in the particular microenvironment; Limitation of the biota of the in flowing water to bacteria, ciliata and colorless flagellata.

Published
2001
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11. Efficient Numerical Integration Using Gaussian Quadrature.

Author

Place, J. and Stach, J.

Abstract

Simulation engineers are occasionally required to include numerical integration in their simulation models. The technique most often used is the simple "trapezoid method." In this short tutorial, we review Gaussian Quadrature techniques for nu merical integration and show how careful deployment of coefficient weights and se lection of the number of coefficients can dramatically reduce the work required to produce excellent numerical results. [ABSTRACT FROM PUBLISHER]

Published
1999
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15. Deep levels of platinum in silicon.

Author

Sandow, P., Das, M., and Stach, J.

Abstract

Platinum has received renewed attention of late from device engineers as a means of lifetime-control in silicon. The energy levels assigned to platinum are not well defined, however, and ambiguities exist in the literature. In this work platinum was introduced into n- and p-type silicon and the energy levels and concentrations studied by thermally stimulated current and capacitance techniques. p]Schottky barrier diodes were used to study electron emission from two levels found in the upper half of the band gap. The use of Schottky barriers eliminated the problem of process-induced defect introduced by high concentration p diffusions. Phosphorus-diffused n - p diodes were used to study hole emission from three levels found in the lower half of the band gap. Platinum concentration versus distance profiles were obtained from thermally stimulated capacitance measurements. Experimental results indicate that the platinum concentration follows the boron concentration distribution near the junction in p-type silicon. [ABSTRACT FROM AUTHOR]

Published
1978
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36. Defect in the generation of cytotoxic T cells in lepromatous leprosy.

Author

Stach, J. -L., Strobel, M., Fumoux, F., and Bach, J. -F.

Subjects
T cells, MYCOBACTERIAL diseases, HANSEN'S disease, LYMPHOCYTES, MYCOBACTERIUM, LEUKOCYTES
Abstract

Cytotoxic T cells are consistently produced in normal individuals after in vitro stimulation by a pool of mitomycin-treated normal lymphocytes. Patients suffering from lepromatous leprosy (LL), presenting with large amounts of Mycobacterium leprae and without a history of erythema nodosum leprosum (ENL) are unable to generate such cytotoxic T cells, while lepromatous patients with ENL which, in the present study were all deprived of M. leprae, react normally. [ABSTRACT FROM AUTHOR]

Published
1982

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