Patents Assigned to University of Alaska
  • Patent number: 5697730
    Abstract: A roadway for use on permafrost terrain is described together with methods of construction, the roadway generally including a porous embankment and a pavement structure disposed on the top of the embankment. The embankment has a desired vertical separation between the bottom and the top of the embankment and comprises material of sufficient permeability to allow buoyancy-driven pore air convection to occur within the embankment when an unstable density stratification exists therein. This unstable density stratification occurs in the winter months when a temperature differential between the top of the embankment and the ground adjacent the bottom of the embankment exists, whereby the roadway promotes natural convection within the porous embankment which enhances heat removal from the embankment and underlying ground to preserve the permafrost layer throughout the year.
    Type: Grant
    Filed: July 21, 1995
    Date of Patent: December 16, 1997
    Assignee: University of Alaska
    Inventor: Douglas J. Goering
  • Patent number: 5676986
    Abstract: The present invention relates to a method for proteolytic degradation of fish muscle having protease enzyme which includes distributing the enzyme uniformly throughout the fish muscle and drying the fish muscle thereafter. The present invention also relates to a method of making a food product and includes reducing hydrolyzed fish muscle to a powdered form, and then mixing the fish muscle in powder form with a starchy and/or proteinaceous material to form a mixture which is subsequently subjected to high temperature extrusion processing to form a desired food product. The present invention further relates to processes for tenderizing or causing substantial or complete proteolytic degradation of animal muscle by applying onto the animal muscle, protease enzyme obtained from fish having the enzyme present therein. Also disclosed is the resulting food products resulting from these processes.
    Type: Grant
    Filed: December 21, 1995
    Date of Patent: October 14, 1997
    Assignee: University of Alaska
    Inventor: Gour S. Choudhury
  • Patent number: 5572123
    Abstract: Inclusions such as encysted parasites and spoilage in food products such as fish fillets are detected by immersing the food products in a bath of an electrolyte, such as a saline solution, having substantially the same electrical conductivity as the uncontaminated food product. An electrical current passed through the electrolyte also passes through the food product. Perturbations in the resulting magnetic field produced by the discontinuities in conductivity at the boundaries of the inclusions or of the spoiled article which have substantially different conductivities from that of the electrolyte and unspoiled food products, provide an indication of the presence of the contamination. Production line inspection rates are achieved by conveying the food products through a container filled with electrolyte and past an array of stationary magnetometers.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: November 5, 1996
    Assignees: University of Alaska, Vanderbilt University
    Inventors: John P. Wikswo, Jr., Yu P. Ma, William G. Jenks, Christopher G. Bublitz, Gour S. Choudhury
  • Patent number: 5549920
    Abstract: A method is disclosed which inactivates protease enzyme in fish, such as arrowtooth flounder, having this enzyme in a portion thereof. In the process, the fish are minced and then subsequently mixed with a starchy and/or proteinaceous material to form a mixture which is then subjected to high-temperature, short-time processing in a screw extruder containing a reaction zone. Also disclosed is the resulting food product resulting from this process.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: August 27, 1996
    Assignee: University of Alaska
    Inventor: Gour S. Choudhury
  • Patent number: 5518741
    Abstract: A method for proteolytic degradation of fish muscle having protease enzyme which includes distributing the enzyme uniformly throughout the fish muscle and drying the fish muscle thereafter. The present invention also relates to a method of making a food product and includes reducing hydrolyzed fish muscle to a powdered form, and then mixing the fish muscle in powder form with a starchy and/or proteinaceous material to form a mixture which is subsequently subjected to high temperature extrusion processing to form a desired food product.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: May 21, 1996
    Assignee: University of Alaska
    Inventor: Gour S. Choudhury
  • Patent number: 5443985
    Abstract: The invention provides a bioreactor for culturing living cells, particularly shear sensitive cells, wherein the bioreactor is composed of a stationary vessel with opposite spaced walls inclined at an angle to form upper and lower walls. Liquid culture medium and cell culture, such as hybridoma cells, are introduced into the vessel and gas is introduced at the lower end of the vessel to form gas bubbles which travel upward along the upper wall of the bioreactor to disengage from a small portion of the gas liquid interface. The gas bubbles circulate the cells and liquid medium, maintaining the cells in suspension and lifting them in a circulating path upwardly parallel to the upper wall and downward along the lower wall. The bioreactor design thus achieves bulk mixing and aeration by maintaining a significant degree of segregation between the upwardly travelling bubbles and the cells in the liquid medium avoiding unnecessary cell damage by fluid-mechanical shear or by bubble bursting events.
    Type: Grant
    Filed: July 22, 1993
    Date of Patent: August 22, 1995
    Assignees: Alberta Research Council, The Governors of the University of Alaska
    Inventors: George Z. Lu, Murray R. Gray, Bradley G. Thompson
  • Patent number: 5418165
    Abstract: The invention includes a new, cold tolerant strain of mycoparasite Trichoderma and mutants that are resistant to a pesticide to which the Trichoderma isolate is sensitive. These novel Trichoderma are capable of parasitizing fungi which are pathogenic to plants. They are also capable of producing proteinaceous, antimycotic substances which can inhibit the growth of plant pathogenic fungi. Cold tolerant Trichoderma and its biotypes can be used in, but not limited to, controlling fungal plant disease.
    Type: Grant
    Filed: April 19, 1993
    Date of Patent: May 23, 1995
    Assignee: The University of Alaska-Fairbanks
    Inventor: Jenifer H. McBeath
  • Patent number: 5409584
    Abstract: An electrical apparatus is provided for the conversion of compounds, elements, or mixtures which are in particulate form, into new compounds, elements or mixtures in gaseous, liquid, or particulate form. In a reaction chamber, particulates are mechanically transported into a first region of high electric field, where they acquire a charge and are projected into a second region in which a low-density plasma is maintained. Energetic plasma ions strike the surfaces of the particulates, causing chemical reactions and release of both neutral and ionic products species. Charge exchange on particulates causes the reduced-size particles to fall back into the first region, where the charging recurs and the cycle is repeated. Gaseous and particulate products are removed from the chamber. In one application, naturally-occurring ores may be reduced by a methane plasma; in another, coal may be converted in a methane plasma to intermediate range hydrocarbons.
    Type: Grant
    Filed: July 27, 1994
    Date of Patent: April 25, 1995
    Assignee: University of Alaska
    Inventor: William M. Sackinger
  • Patent number: 5356796
    Abstract: A nucleotide sequence coding for a repressor protein for regulating gene expression that comprises about a 687 bp nucleotide region beginning about 81 bases upstream from the 2,2-dialkylglycine decarboxylase structural gene shown in FIG. 3. The repressor protein comprises about 229 amino acids. The nucleotide sequence is useful for regulating gene expression in recombinant expression vectors. The vectors and E. coli cells transformed with the vectors are useful for preparing Pseudomonas cepacia 2,2-dialkylglycine decarboxylase.
    Type: Grant
    Filed: September 28, 1992
    Date of Patent: October 18, 1994
    Assignee: The University of Alaska
    Inventor: John W. Keller
  • Patent number: 5356524
    Abstract: An electrical apparatus is provided for the conversion of compounds, elements, or mixtures which are in particulate form, into new compounds, elements or mixtures in gaseous, liquid, or particulate form. In a reaction chamber, particulates are mechanically transported into a first region of high electric field, where they acquire a charge and are projected into a second region in which a low-density plasma is maintained. Energetic plasma ions strike the surfaces of the particulates, causing chemical reactions and release of both neutral and ionic products species. Charge exchange on particulates causes the reduced-size particles to fall back into the first region, where the charging recurs and the cycle is repeated. Gaseous and particulate products are removed from the chamber. In one application, naturally-occurring ores may be reduced by a methane plasma; in another, coal may be converted in a methane plasma to intermediate range hydrocarbons.
    Type: Grant
    Filed: April 20, 1993
    Date of Patent: October 18, 1994
    Assignee: University of Alaska
    Inventor: William M. Sackinger
  • Patent number: 5289123
    Abstract: A method for examining an edible product, such as fresh fish flesh, for dielectric inclusions, such as encysted parasites. The product is subjected to a current flow, which may be perturbed or deviated by any hidden inclusions. An electromagnetic effect of perturbed current flow is detected. In a preferred implementation, one or more scans of the external magnetic consequences of the effect of an inclusion allows the discovery and removal of the inclusion.
    Type: Grant
    Filed: January 14, 1992
    Date of Patent: February 22, 1994
    Assignee: University of Alaska
    Inventors: Christopher G. Bublitz, Gour S. Choudhury
  • Patent number: 5210025
    Abstract: A nucleotide sequence coding for a repressor protein for regulating gene expression comprises about a 687 bp nucleotide region beginning about 81 bases upstream from the 2,2-dialkylglycine decarboxylase structural gene shown in FIG. 3. The repressor protein comprises about 229 amino acids. The nucleotide sequence is useful for regulating gene expression in recombinant expression vectors. The vectors and E. coli cells transformed with the vectors are useful for preparing Pseudomonas cepacia 2,2-dialkylglycine decarboxylase.
    Type: Grant
    Filed: March 30, 1990
    Date of Patent: May 11, 1993
    Assignee: University of Alaska
    Inventor: John W. Keller
  • Patent number: 5141715
    Abstract: An electrical device is provided for the conversion of molecules of one molecular weight into molecules of another molecular weight. A reaction chamber comprises an array of dynodes, each of which possesses a plurality of apertures. External voltages are available which are applied between dynodes, producing an electric field. During operation, electrons and ions strike the interior surfaces of the dynode apertures, ionizing neutral molecules absorbed on the surfaces, which are desorbed by the energy of the impact, and which are accelerated by the electric field to a new dynode surface location, where they combine with absorbed molecules there to form a variety of new, larger molecules, or different, smaller molecules. Certain ones of the ions created are repetitively moved to one end of the device, where they may be pumped away separately.
    Type: Grant
    Filed: April 9, 1991
    Date of Patent: August 25, 1992
    Assignee: University of Alaska
    Inventors: William M. Sackinger, Brian L. Morgan, Robert W. Airey
  • Patent number: 5019355
    Abstract: An electrical device is provided for the conversion of low-molecular-weight molecules, such as methane, into higher weight molecules, such as heptane and octane. The reaction chamber contains an array of parallel dielectric tubes, with a semiconducting layer beneath their inner surfaces which carries a current. During operation, electrons strike the inner surfaces of the tubes, ionizing molecules absorbed on the surfaces, which are then accelerated by the electric field and are carries to a new surface location, where they combine with absorbed molecules there to form a variety of new larger molecules. Excess hydrogen in the ionized condition is removed, being accelerated by the electric field to the opposite ends of the tubes. Under some conditions of operation, large molecules can be segmented into smaller ones.
    Type: Grant
    Filed: February 22, 1990
    Date of Patent: May 28, 1991
    Assignee: University of Alaska
    Inventor: William M. Sackinger