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Title: Dynamic bed reactor

Abstract

A dynamic bed reactor is disclosed in which a compressible open cell foam matrix is periodically compressed and expanded to move a liquid or fluid through the matrix. In preferred embodiments, the matrix contains an active material such as an enzyme, biological cell, chelating agent, oligonucleotide, adsorbent or other material that acts upon the liquid or fluid passing through the matrix. The active material may be physically immobilized in the matrix, or attached by covalent or ionic bonds. Microbeads, substantially all of which have diameters less than 50 microns, can be used to immobilize the active material in the matrix and further improve reactor efficiency. A particularly preferred matrix is made of open cell polyurethane foam, which adsorbs pollutants such as polychlorophenol or o-nitrophenol. The reactors of the present invention allow unidirectional non-laminar flow through the matrix, and promote intimate exposure of liquid reactants to active agents such as microorganisms immobilized in the matrix.

Inventors:
 [1]
  1. (Moscow, ID)
Publication Date:
Research Org.:
University of Idaho
OSTI Identifier:
870492
Patent Number(s):
US 5531897
Application Number:
07/960,963
Assignee:
Idaho Research Foundation, Inc. (Moscow, ID) IDO
DOE Contract Number:
FG07-89ER60847
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
dynamic; bed; reactor; disclosed; compressible; cell; foam; matrix; periodically; compressed; expanded; move; liquid; fluid; preferred; embodiments; contains; active; material; enzyme; biological; chelating; agent; oligonucleotide; adsorbent; passing; physically; immobilized; attached; covalent; ionic; bonds; microbeads; substantially; diameters; 50; microns; immobilize; improve; efficiency; particularly; polyurethane; adsorbs; pollutants; polychlorophenol; o-nitrophenol; reactors; allow; unidirectional; non-laminar; flow; promote; intimate; exposure; reactants; agents; microorganisms; particularly preferred; fluid passing; cell foam; polyurethane foam; preferred embodiments; bed reactor; active material; preferred embodiment; chelating agent; laminar flow; liquid reactant; periodically compressed; active agents; biological cell; dynamic bed; liquid reactants; /210/

Citation Formats

Stormo, Keith E. Dynamic bed reactor. United States: N. p., 1996. Web.
Stormo, Keith E. Dynamic bed reactor. United States.
Stormo, Keith E. 1996. "Dynamic bed reactor". United States. doi:. https://www.osti.gov/servlets/purl/870492.
@article{osti_870492,
title = {Dynamic bed reactor},
author = {Stormo, Keith E.},
abstractNote = {A dynamic bed reactor is disclosed in which a compressible open cell foam matrix is periodically compressed and expanded to move a liquid or fluid through the matrix. In preferred embodiments, the matrix contains an active material such as an enzyme, biological cell, chelating agent, oligonucleotide, adsorbent or other material that acts upon the liquid or fluid passing through the matrix. The active material may be physically immobilized in the matrix, or attached by covalent or ionic bonds. Microbeads, substantially all of which have diameters less than 50 microns, can be used to immobilize the active material in the matrix and further improve reactor efficiency. A particularly preferred matrix is made of open cell polyurethane foam, which adsorbs pollutants such as polychlorophenol or o-nitrophenol. The reactors of the present invention allow unidirectional non-laminar flow through the matrix, and promote intimate exposure of liquid reactants to active agents such as microorganisms immobilized in the matrix.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1996,
month = 7
}

Patent:

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  • A dynamic bed reactor is disclosed in which a compressible open cell foam matrix is periodically compressed and expanded to move a liquid or fluid through the matrix. In preferred embodiments, the matrix contains an active material such as an enzyme, biological cell, chelating agent, oligonucleotide, adsorbent or other material that acts upon the liquid or fluid passing through the matrix. The active material may be physically immobilized in the matrix, or attached by covalent or ionic bonds. Microbeads, substantially all of which have diameters less than 50 microns, can be used to immobilize the active material in the matrixmore » and further improve reactor efficiency. A particularly preferred matrix is made of open cell polyurethane foam, which adsorbs pollutants such as polychlorophenol or o-nitrophenol. The reactors of the present invention allow unidirectional non-laminar flow through the matrix, and promote intimate exposure of liquid reactants to active agents such as microorganisms immobilized in the matrix. 27 figs.« less
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  • A phased array ultrasonic imaging system is disclosed which combines aspects of both dynamic and pseudo-dynamic focusing. The system includes a linearly arranged array of side-by-side transducers adapted for propagating ultrasonic energy into a body to be ultrasonically examined and for receiving reradiated sonic energy from points within the body. A signal channel is connected to each of the transducers for activating same to propagate the sonic energy and for receiving electrical signals from the transducers (Which correspond to the reradiated energy). Controllable delay means are provided in each of the channels for introducing linear phase shifts in the electricalmore » signals proceeding in the channels during both transmission and reception to thereby azimuthally steer the transducer array. Means are further provided for processing the received signals proceeding through the channels and for combining same to effect a visual display of the bodily portion being examined. Means synchronized with the activating of the transmitters periodically reduce the gain of one or more symmetric outer transducer pairs of the array , thereby effecting reducing the aperture of the array to enable improved response to reflected acoustic information reaching the array from the near field thereof. The outer elements are similarly restored to enlarge the effective array aperture for improved response to reflected acoustic information arising from the far field of the array. Pursuant to the improvement of the invention, means are provided for adjusting the focal length of the array coincident with the aforementioned change in gain of the one or more outer transducer pairs, I.E., coincident with a change in effective aperture of the array in order to thereby maintain or achieve a desired resolution within a specified focal range.« less