Enrichment and Determination of Zinc by High-Speed Countercurrent Chromatography.

This chapter reviews traditional and new zooplankton sampling techniques, sample preservation, and sample analysis, and provides the sources where in-depth discussion of these topics is addressed. The net systems that have been developed over the past 100+ years, many of which are still in use today, can be categorized into eight groups: non-opening/closing nets, simple opening/closing nets, high-speed samplers, neuston samplers, planktobenthos plankton nets, closing cod-end samplers, multiple net systems, and moored plankton collection systems. Methods of sample preservation include preservation for sample enumeration and taxonomic morphological analysis, and preservation of samples for genetic analysis. Methods of analysis of zooplankton samples include determination of biomass, taxonomic composition, and size by traditional methods; and genetic analysis of zooplankton samples.

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CHROMATOGRAPHY | Countercurrent Chromatography and High Speed Countercurrent Chromatography:Instrumentation

Encyclopedia of Separation Science ◽

10.1016/b0-12-226770-2/03271-3 ◽

2000 ◽

pp. 365-374

Author(s):

W.D. Conway

Keyword(s):

High Speed ◽

Countercurrent Chromatography

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Thermal accommodation coefficients by high speed vibration of solid samples. IV. Determination of translational and internal energy accommodation coefficients

The Journal of Chemical Physics ◽

10.1063/1.434960 ◽

1977 ◽

Vol 67 (3) ◽

pp. 1099 ◽

Cited By ~ 12

Author(s):

Gerd M. Rosenblatt ◽

Richard S. Lemons ◽

Clifton W. Draper

Keyword(s):

Internal Energy ◽

High Speed ◽

Solid Samples ◽

Thermal Accommodation ◽

Energy Accommodation ◽

Accommodation Coefficients

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Reynolds-averaged Navier–Stokes simulation of hydrofoil effects on hydrodynamic coefficients of a catamaran in forced oscillation

Proceedings of the Institution of Mechanical Engineers Part M Journal of Engineering for the Maritime Environment ◽

10.1177/1475090216642468 ◽

2016 ◽

Vol 231 (2) ◽

pp. 364-383

Author(s):

Amin Najafi ◽

Mohammad Saeed Seif

Keyword(s):

High Speed ◽

Experimental Approach ◽

Navier Stokes ◽

Hydrodynamic Coefficients ◽

Laboratory Equipment ◽

Factors Affecting ◽

High Frequencies ◽

Frequency Independent ◽

Reynolds Averaged Navier Stokes

Determination of high-speed crafts’ hydrodynamic coefficients will help to analyze the dynamics of these kinds of vessels and the factors affecting their dynamic stabilities. Also, it can be useful and effective in controlling the vessel instabilities. The main purpose of this study is to determine the coefficients of longitudinal motions of a planing catamaran with and without a hydrofoil using Reynolds-averaged Navier–Stokes method to evaluate the foil effects on them. Determination of hydrodynamic coefficients by experimental approach is costly and requires meticulous laboratory equipment; therefore, utilizing the numerical methods and developing a virtual laboratory seem highly efficient. In this study, the numerical results for hydrodynamic coefficients of a high-speed craft are verified against Troesch’s experimental results. In the following, after determination of hydrodynamic coefficients of a planing catamaran with and without foil, the foil effects on its hydrodynamic coefficients are evaluated. The results indicate that most of the coefficients are frequency-independent especially at high frequencies.

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THE DETERMINATION OF DIGITAL WIENER FILTERS BY MEANS OF GRADIENT METHODS

Geophysics ◽

10.1190/1.1440342 ◽

1973 ◽

Vol 38 (2) ◽

pp. 310-326 ◽

Cited By ~ 27

Author(s):

R. J. Wang ◽

S. Treitel

Keyword(s):

Seismic Data ◽

High Speed ◽

Gradient Methods ◽

Wiener Filter ◽

Gradient Algorithm ◽

Rapid Convergence ◽

True Solution ◽

Peripheral Device ◽

Wiener Filters

The normal equations for the discrete Wiener filter are conventionally solved with Levinson’s algorithm. The resultant solutions are exact except for numerical roundoff. In many instances, approximate rather than exact solutions satisfy seismologists’ requirements. The so‐called “gradient” or “steepest descent” iteration techniques can be used to produce approximate filters at computing speeds significantly higher than those achievable with Levinson’s method. Moreover, gradient schemes are well suited for implementation on a digital computer provided with a floating‐point array processor (i.e., a high‐speed peripheral device designed to carry out a specific set of multiply‐and‐add operations). Levinson’s method (1947) cannot be programmed efficiently for such special‐purpose hardware, and this consideration renders the use of gradient schemes even more attractive. It is, of course, advisable to utilize a gradient algorithm which generally provides rapid convergence to the true solution. The “conjugate‐gradient” method of Hestenes (1956) is one of a family of algorithms having this property. Experimental calculations performed with real seismic data indicate that adequate filter approximations are obtainable at a fraction of the computer cost required for use of Levinson’s algorithm.

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Separation of anti-ulcer flavonoids from Artemisia extracts by high-speed countercurrent chromatography

Food Chemistry ◽

10.1016/j.foodchem.2011.05.005 ◽

2011 ◽

Vol 129 (2) ◽

pp. 679-683 ◽

Cited By ~ 36

Author(s):

Kee Dong Yoon ◽

Young-Won Chin ◽

Min Hye Yang ◽

Jinwoong Kim

Keyword(s):

High Speed ◽

Countercurrent Chromatography

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