Abstract: The invention is drawn to a nozzle device for gas torches which allows interactive, real-time control of thermoplastic processing and a method of using this device. The device consists of a movable nozzle slide that it attached to the tip of the torch. The nozzle slide can be moved in an upward or downward direction, thereby changing the amount of heat contacting the material.
Type:
Grant
Filed:
May 10, 1994
Date of Patent:
May 6, 1997
Assignee:
University of Delaware
Inventors:
Ian Howie, Roderic Don, John W. Gillespie, Scott Holmes
Abstract: A water-resistant polyphenolic protein adhesive has been obtained from the Atlantic ribbed mussel, Geukensia (Modiolus) demissa. This protein provides a natural model for synthetic or bioengineered adhesives and is characterized by a Gly-Tyr-Lys or, more frequently, Gly-Dop-Lys "tail" fragment of a repeating octapeptide or nonapeptide unit. A complete octapeptide or nonapeptide unit (including both the 5- or 6-amino acid residue "head" as well as the 3-residue "tail") can be represented as follows:[Gln]Glu].sub.x -Thr/Ala-Gly-Dop/Tyr-Y.sup.1 -Y.sup.2 -Gly-Tyr/Dop-Lyswhere x is zero or one,Y.sup.1 is Val, Leu, Asp or Ser, andY.sup.2 is Ala, Pro, Hyp, or Leu.The tripeptide "tail" and/or the 5- or 6-residue "head" of the polypeptide is useful as a single unit (curable with difunctional crosslinkers or the like) or as a repeating unit.
Abstract: Described and claimed are the callus of Vanilla planifolia, the preparation of the same and the extraction of vanillin therefrom, and the use of ferulic acid to increase the content of vanillin.
Type:
Grant
Filed:
October 14, 1993
Date of Patent:
November 12, 1996
Assignee:
University of Delaware
Inventors:
Gayle Davidonis, Dietrich W. Knorr, Lynn G. Romagnoli
Abstract: An aerodynamic nozzle for aerosol particle beam formation into a vacuum comprises a tubular column having a first stage section with a plurality of spaced aerodynamic lenses therein so that an aerosol entering the inlet end of the first stage section is formed into a beam of generally aligned particles. The beam exits the first stage section through an outlet orifice into a second stage section also having a plurality of spaced aerodynamic lenses to maintain the aerosol in its beam form. The beam then exists through a nozzle to an orifice at the discharge end of the second stage section into an evacuated region. The pressure decreases from the first stage (which is preferably at atmospheric pressure) to the second stage to the evacuated region.
Type:
Grant
Filed:
August 4, 1995
Date of Patent:
October 15, 1996
Assignee:
The University of Delaware
Inventors:
Anthony S. Wexler, Murray V. Johnston, III, Ramakrishna Mallina
Abstract: The present invention relates to a method and setup for providing high resolution CT images at a low cost. The method utilizes a modified version of the standard CT setup wherein the radiation receiver (e.g., a detector(s)) is tilted with respect to an axis perpendicular to the plane of fan beam projection (e.g., when a fan shaped radiation beam is used). Moreover, to maximize the utilization of the radiation receiver and obtain the highest resolution in the final image, the radiation receiver is also shifted horizontally within the radiation beam.
Abstract: The present invention relates to an improved catalyst for the selective synthesis of monomethylamine (MMA) and dimethylamine (DMA) at the expense of trimethylamine (TMA) for a starting feed of methanol and/or dimethyl ether and ammonia. The current industrial catalyst for this process is a standard SiO.sub.2 /Al.sub.2 O.sub.3 material. The present invention combines this standard catalyst with microporous carbon molecular sieves (CMS) to form a composite material (i.e., a CMS/SiO.sub.2 /Al.sub.2 O.sub.3 material) with higher selectivity for the desired products MMA and DMA. The invention also relates to methods of making the improved catalyst and a process of using the improved catalyst material in the production of MMA and DMA.
Type:
Grant
Filed:
July 21, 1994
Date of Patent:
January 9, 1996
Assignees:
University of Delaware, E. I. Du Pont de Nemours & Co., Inc.
Inventors:
Henry C. Foley, George C. Sonnichsen, Loren D. Brake, Ravindra K. Mariwala, Davis S. Lafyatis
Abstract: This invention relates to a process of manufacturing ketenes, more particularly, a process for manufacturing ketenes by gas phase dehydration of carboxylic acids. The catalyst used in this process consists of a high surface area silica of at least 100 m.sup.2 /gram.
Type:
Grant
Filed:
June 8, 1994
Date of Patent:
December 12, 1995
Assignee:
The University of Delaware
Inventors:
P. C. Watson, M. C. Libby, M. A. Barteau
Abstract: The present invention relates to an improved catalyst for the selective synthesis of monomethylamine (MMA) and dimethylamine (DMA) at the expense of trimethylamine (TMA) for a starting feed of methanol and/or dimethyl ether and ammonia. The current industrial catalyst for this process is a standard SiO.sub.2 /Al.sub.2 O.sub.3 material. The present invention combines this standard catalyst with microporous carbon molecular sieves (CMS) to form a composite material (i.e., a CMS/SiO.sub.2 /Al.sub.2 O.sub.3 material) with higher selectivity for the desired products MMA and DMA. The invention also relates to methods of making the improved catalyst and a process of using the improved catalyst material in the production of MMA and DMA.
Type:
Grant
Filed:
July 21, 1994
Date of Patent:
November 28, 1995
Assignees:
University of Delaware, E. I. Du Pont de Nemours & Co., Inc.
Inventors:
Henry C. Foley, George C. Sonnichsen, Loren D. Brake, Ravindra K. Mariwala, David S. Lafyatis
Abstract: An isolated nucleic acid molecule encoding the gB glycoprotein of Infectious Laryngotracheitis Virus is disclosed. Also disclosed is incorporation of the gB gene into recombinant avipox virus for a vaccine used to immunize fowl.
Abstract: A new alloy for permanent magnets which is of the composition (R.sub.x Fe.sub.y-w Co.sub.w M.sub.z)L.sub..alpha. transition metals M such as, but not limited to Cr, Mo, Ti and V and mixtures thereof. R would be rare earth metals such as, but not limited to Nd, Pr, Dy and Tb, other rare earths, Y, and La and mixtures thereof. L is carbon or nitrogen or a mixture thereof. x+y+z equals 100 atomic %, x is from about 5 to about 20%, y is from about 65 to about 85%, z is from about 6 to about 20%, w.ltoreq.20%, and .alpha. is from about 4 to about 15%. We have also developed a new process whereby the alloy metal magnets are formed by taking the ingredients and arc melting the individual elements R, Fe, Co and M at least once whereby forming an alloy ingot, and if necessary, remelting the alloy ingot as many times as necessary and reforming the alloy to form a more uniform alloy. The alloy formed is then ground into a powder. The powders are then formed into magnets and are bonded at high temperatures.
Abstract: The present invention relates to an improved catalyst for the selective synthesis of monomethylamine (MMA) and dimethylamine (DMA) at the expense of trimethylamine (TMA) for a starting feed of methanol and/or dimethyl ether and ammonia. The current industrial catalyst for this process is a standard SiO.sub.2 /Al.sub.2 O.sub.3 material. The present invention combines this standard catalyst with microporous carbon molecular sieves (CMS) to form a composite material (i.e., a CMS/SiO.sub.2 /Al.sub.2 O.sub.3 material) with higher selectivity for the desired products MMA and DMA. The invention also relates to methods of making the improved catalyst and a process of using the improved catalyst material in the production of MMA and DMA.
Type:
Grant
Filed:
July 30, 1993
Date of Patent:
October 11, 1994
Assignees:
The University of Delaware, E. I. Du Pont de Nemours Company, Inc.
Inventors:
Henry C. Foley, George C. Sonnichsen, Loren D. Brake, Ravindra K. Mariwala, David S. Lafyatis
Abstract: A solar cell or photo diode has an n-type semiconductor layer and a p-type semiconductor layer which form a pn-junction at the metallurgical interface of the layers. A thin sheet of undoped semiconductor is located at the interface or the lower doped layer. The sheet has less recombination centers than its adjacent regions and prevents cross-doping of donors and acceptors from the n- and p-side by cross-diffusion to increase the open circuit voltage and fill-factor of the solar cells or photo diode.
Abstract: Homogeneous polymer blends are prepared from otherwise thermodynamically immiscible polymers. Thus, mixtures of polymers such as poly (methyl methacrylate) and poly (ethyl methacrylate) are dissolved under pressure in supercritical fluid solvents such as chlorodifluoromethane and expanded through a fine nozzle. As the SCF solvent evaporates, the polymer mixture deposits as a substantially homogeneous blend.
Abstract: A method for the preparation of a carbon molecular sieve capable of separating acid gases and fluorocarbons of the formula C.sub.a H.sub.b X.sub.c F.sub.d, wherein a is from 1 to about 6, b is from 0 to about 13, c is from 0 to about 13, d is from 1 to about 14, and X is a halogen; on the basis of shape selectivity and size exclusion. A precursor resin is heated at about 0.2.degree. C. per minute to about 500.degree. C. Then the resin is soaked at about 500.degree. C. for about 6 hours in flowing inert gas.
Type:
Grant
Filed:
September 10, 1992
Date of Patent:
November 16, 1993
Assignees:
University of Delaware, E. I. Du Pont de Nemours Co.
Inventors:
Henry C. Foley, Ravindra K. Mariwala, Leo Manzer
Abstract: Novel live, cold-adapted temperature-sensitive (CaTs), attenuated Newcastle disease virus vaccines are provided which are effectively immunogenic and contain a mutant of a Hitchner B.sub.1 parent strain of Newcastle disease virus.
Abstract: An improved method and system of monitoring and identifying microbiota swimming in a fluid or moving across surfaces in a fluid provides a sensitive method for rapidly measuring very small changes in activity, and detecting and identifying individual microbes in relatively large volumes of fluid, even in the presence of detritus. The system comprises a laser station, a sample collector station, a picture taking station and a monitoring station.
Abstract: A process for the separation of elemental sulfur from a gas comprises contacting the gas with molten sulfur whereby to extract the sulfur from the gas.
Abstract: The process of this invention will remove acid rain precursors, sulfur oxides (SOX) and nitrogen oxides (NOX) by catalytically reducing the NOX to water and elemental nitrogen and the SOX to either H.sub.2 S or elemental sulfur as desired. The process employs specific catalysts in the heteropoly acid or salt group and the spinel or inverse spinel group. The process conditions achieve an oxygen-free environment and reduction is effected with stoichiometric to 100% excess above stoichiometric H.sub.2 or H.sub.2 and CO as reducing gas. Temperatures can be 200.degree. to 900.degree. C. with the lower temperature range being favored space velocity can be 2000 to 20,000 and still achieve 95+% abatement. The only product of the reaction which must be disposed of is saleable elemental sulfur.
Abstract: The body composition of poultry is improved by a hormonal strategy that includes the step ofincreasing plasma levels of thyroid hormone to about 150-250% (normal endogeneous T.sub.3 hormone level=100%) during essentially the finishing phase (e.g., for chickens, 3 to 6 or 7 weeks-of-age) by administering (preferably orally) a metabolically-active thyroid hormone of the formula: ##STR1## wherein X is O, S, or CH.sub.2.Z is C.sub.2 -C.sub.4 alkylene or amino-substituted C.sub.2 -C.sub.4 alkylene,M.sup.+ is a physiologically acceptable cation, R.sub.3 and R.sub.5 are H or iodo, at least one of them being iodo,R.sub.3 ' and R.sub.5 ' are iodo, or hydrogen or --A--COO--M.sup.30 , where A is C.sub.2 -C.sub.4 alkylene and M.sup.30 is a physiologically acceptable cation,provided, that when R.sub.3 ', R.sub.5 ', R.sub.3 and R.sub.5 are all iodo, then Z--COO-- is the residue of the anion of acetic or propionic acid.