منابع مشابه
Laboratory Procedures, Apparatus and Improvizations
In the recent medical literature, there has been an almost uninterrupted flow of papers describing new methods of desiccation, or introducing some modifications in old methods. It is not the purpose of this paper to describe a new method of desiccation, but to stress certain technical details and amplify certain procedures which it is hoped will be found useful in any method finally selected by...
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Aeration of some sort is frequently provided during laboratory cultivation of bacteria. Since metabolic responses and the nature of fermentation products may depend upon the amount of available oxygen (Pirt, 1957), it is important to have some adequate measure of this variable. Finn (1954) has pointed out that gassing rates alone are without significance; it is necessary to determine the rate a...
متن کاملEntangled photon apparatus for the undergraduate laboratory
We present detailed instructions for constructing and operating an apparatus to produce and detect polarization-entangled photons. The source operates by type I spontaneous parametric downconversion in a two-crystal geometry. Photons are detected in coincidence by single-photon counting modules and show strong angular and polarization correlations. We observe more than 100 entangled photon pair...
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The application of microalgae for energy purposes and CO2 biomitigation continues to present a number of challenges, including the optimization of culture conditions. The application of experimental designs for microalgae cultivation is difficult, since experiments involving such microorganisms generally last days or weeks. This work proposes a multipurpose laboratory apparatus for the optimiza...
متن کاملMethod and Apparatus for Improved Active Sonar
The invention is a method for improved active sonar using a singular value decomposition filtering and a Volterra-Hermite Basis Expansion to model real active sonar measurements. The fitting model minimizes the sum of the squared errors between a measured channel response, z(t), and model response, y(t), which is a fitted Volterra Series solution. The model requires as input an excitation wavef...
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ژورنال
عنوان ژورنال: American Journal of Public Health and the Nations Health
سال: 1937
ISSN: 0002-9572
DOI: 10.2105/ajph.27.4.346