31
Brian D Ross, Peter B Kingsley: Isotope and assay for glycolysis and the pentose phosphate pathway. The Regents of the University of Michigan, Harness Dickey & Pierce, August 8, 1995: US05439803 (32 worldwide citation)

An isotopically substituted molecule D-(1,6-.sup.13 C.sub.2,6,6-.sup.2 H.sub.2)glucose and method of use is provided for measuring the relative activities of glycolysis and the pentose phosphate pathway (PPP). By using the isotope, labeled in the C1 and C6 positions, of the present invention, a sing ...


32
Raymond Annino, Edward L Lewis, Dale E Lueck, Matthew L Phillips, Richard Villalobos: Modular gas chromatography device. The Foxboro Company, Jules Jay Morris, James M Smith, August 23, 1994: US05340543 (31 worldwide citation)

A chromatography device for separating sample fluids from carrier fluids and analyzing the sample is configured so that it is a modular unit. This modularity enables repairs to be quickly effected on the unit and also greatly simplifies the task of accessing the components of the chromatography cart ...


33
Robert O Brien: Method and apparatus for concentrating samples for analysis. The State of Oregon Acting By and Through The State Board of Higher Education On Behalf of Portland State University, Klarquist Sparkman, October 11, 2005: US06952945 (29 worldwide citation)

A method for analyzing a gas sample is described. The method comprises providing a gas sample, increasing pressure applied to the gas sample to compress the sample to a smaller volume and provide a pneumatically focused gas sample, and analyzing the pneumatically focused gas sample using any of a va ...


34
Michael R Strunk, William E Bechtold: Automated two-dimensional interface for capillary gas chromatography. Lovelace Biomedical & Environmental Research Institute, Roger F Phillips, February 20, 1996: US05492555 (29 worldwide citation)

A multidimensional gas chromatograph (GC) system having wide bore capillary and narrow bore capillary GC columns in series and having a novel system interface. Heart cuts from a high flow rate sample, separated by a wide bore GC column, are collected and directed to a narrow bore GC column with carr ...


35
Glenn M Thompson: System for continuously monitoring for leaks in underground storage tanks. Tracer Research Corporation, Harry M Weiss & Associates, December 1, 1987: US04709577 (29 worldwide citation)

An apparatus and method for detecting leaks from underground gasoline storage tanks and the like by routine or periodic soil samples tested for a particular tracer. A fluorinated halocarbon compound tracer having a boiling point less than that of gasoline is slowly dispensed within the gasoline, nat ...


36
Richard L Scott: Predetector reservoir for chromatographic analysis instrument. Phillips Petroleum Company, August 21, 1984: US04467038 (28 worldwide citation)

A gas chromatographic apparatus is provided which comprises a gas chromatography column, a detector and an extended conduit between the column and the detector, the conduit providing means for flow of a gas so as to enable essentially complete elution of the gas from the column before the gas is det ...


37
Leonard H Nelms, Kenneth D Reiszner, Philip W West: Personal monitoring device, or dosimeter, for measuring exposure of personnel to organic vapors. Board of Supervisors Louisiana State University Agricultural and Mechanical College, L A Proctor, August 9, 1977: US04040805 (28 worldwide citation)

A personal monitoring device, dosimeter, or badge-like apparatus for measuring the exposure of personnel to pollutant toxic organic vaporous materials, notably vinyl chloride, comprised of a body portion provided with a relatively shallow top cavity, or cup-like member completely filled with an adso ...


38
James S Fullemann: Injection septum with dust wiper. Merlin Instrument Company, Anderson & Hirsch, July 2, 1996: US05531810 (28 worldwide citation)

A cap assembly for a gas chromatography injection port includes a two-piece septum. The two-piece septum includes a syringe seal for sealing an injection needle and a duckbill seal for sealing the injection port when the needle is not inserted. The syringe seal includes three annular ribs in its ape ...


39
Walter R Fehr, Earl G Hammond: Soybeans having low linolenic acid content and palmitic acid content of at least eleven percent. Iowa State University Research Foundation, Burns Doane Swecker & Mathis L, June 9, 1998: US05763745 (28 worldwide citation)

Methods are described for the production of soybean varieties and lines exhibiting linolenic acid contents of less than about 2.5% of the total fatty acid composition as determined by gas chromatography, preferably less than about 2.2% and, more preferably, less than about 1.9%, and in one aspect of ...


40
Richard D Sacks, Christine L Rankin: Thermal modulation inlet for gas chromatography system. The Regents of the University of Michigan, Harness Dickey & Pierce, August 25, 1992: US05141532 (27 worldwide citation)

A gas chromatography system which incorporates a simplified sample injection system in which replaces conventional mechanical injection systems with one based strictly upon thermal trapping of a continuously supplied carrier gas and sample stream. The carrier gas and sample stream pass continuously ...



Click the thumbnails below to visualize the patent trend.