Search Results

You are looking at 1 - 10 of 353 items :

  • "Gaschromatography" x
Clear All

Buchbesprechungen Gas-Chromatography. Third International Symposium held under the auspices of the Analysis Instrumentation Division of the Instrument Society of America, June 13—16, 1961 ; hrsg. Nathaniel Brenner, Joseph E. Callen und Marvin D. Weiss. Academic Press, New York-London 1962. 719 Seiten, Preis $ 22,—. Die ,,Analysis Instrumentation Division" der „Instrument Society of America" veranstaltete im Juni 1961 das dritte internationale Symposium über Gas-Chromatographio an der Michigan Stato University. Frühere Symposien fanden 19571 und 19592 ebenfalls in

Külpmann, Fitzlaff, Spring and Dietz: Thiopental monitoring by gas chromatography 181 J. Clin. Chcm. Clin. Biochem. Vol. 21, 1983 pp. 181-184 Thiopental Monitoring by Gas-Chromatography By W. R. Külpmann, R. Fitzlaff Technical assistance: K. Petry and L. Lütke-Holz Institut für Klinische Chemie, A. Spring and H. Dietz Neurochirurgische Klinik, Medizinische Hochschule Hannover (Rcceived March 25/August 24, 1982) Summary: A gaschromatographic method is presented for the determination of thiopental (and of its met- abolite pentobarbital) in cases of severe head


The potential of pyrolysis followed by gas-chromatography and mass-spectrometry (Py-GC/MS) was investigated for identifying compression wood (CW) in saplings of radiata pine (Pinus radiata) by examining samples of CW and opposite wood (OW). Phenolic compounds and anhydrosugars were identified among the pyrolysis products that provided information about the cell-wall polymers. Sample preparation, such as coarse-milling, fine-milling, and fine-milling followed by calcium-chloride treatment was also investigated. Fine-milling typically decreased the total yield of phenolic compounds compared with coarse-milling. Fine-milling followed by calcium-chloride washing significantly increased the proportions of pyrolysis products from polysaccharides, specifically from (1→4)-β-D-galactans that were of interest in distinguishing CW from OW. Six pyrolysis products were identified that were unique to the CW samples examined, including derivatives of (1→4)-β-D-galactans and H-units of lignin. Other pyrolysis products were identified that had significantly different proportions between the two wood types, and sometimes among samples of the same wood type.

Pure & Appl.Chem.., Vol.54, No.4, pp.847—852, 1982. 00334545/82/04084706$03.OO/O Printed in Great Britain. Pergamon Press Ltd ©1982 [UPAC METAL-CHELATE GAS-CHROMATOGRAPHY FOR TRACE ELEMENT ANALYSIS Roif Neeb Institut für Anorganische Chemie und Analytische Chemie der Johannes Gutenberg-Universität Mainz, Postfach 3980, D-6500 Mainz, Bundesrepublik Deutschland Abstract - 1, 1-dithiolato-chelates, especially dithiocarbamates, have proved very useful in gas chromatographic analysis of inorganic elements. Fluorination of diethyldithiocarbamates markedly improves

Klimisch, Meißner and Wernicke: Quantitative determination of carbon monoxide 535 Z. Klin. Chem. Klin. Biochem. 12. Jg. 1974, S. 535-538 Quantitative Determination of Carbon Monoxide in Blood by Gaschromatography By H.-J. Klimisch 9K. Meißner and A Wernicke Forschungsinstitut der Cigarettenindustrie e. V. (Direktor: Prof. Dr. W. Dontenwill) 2 Hamburg (Eingegangen am 16. Mai/12. August 1974) The gaschromatographic determination of CO in blood has been simplified by using carbon molecular sieve columns for separation of gases. Regeneration of the columns is

REACTION GASCHROMATOGRAPHY FOR STRUCTURE ELUCIDATION OF TERPENOID ALCOHOLS. SESQUITERPENE ALCOHOLS PRESENT IN THE INSECTICIDAL ESSENTIAL OIL OF CHRYSAN- THEMUM BALSAMITA U. Kobold, 0. Vostrowsky, H.J. Bestmann Institut für Organische Chemie der Universität Erlangen-Nürnberg, Henkestraße 42, D-8520 Erlangen, FRG Introduction Heterogenous gas phase dehydration of alcohols using alumina as the catalyst is known for a long time (1) and this reaction has been used to eliminate water from monoterpene alcohols (2,3). We present the use of this reaction in

Combined Solid Phase and Solution Synthesis of the Fully Protected Segment 74-99 of HIV 1-Protease with the Application of a New Trityl-Linker B ernd H enkel, Lianshan Zhang, Carsten G oldam m er, Ernst Bayer* Institute of Organic Chemistry, University of Tübingen, Auf der Morgenstelle 18, D-72076 Tübingen, Germany Z. Naturforsch. 51b, 1339-1346 (1996); received April 10, 1996 HIV 1-Protease, Trityl-Linker, Fragment Condensation, Peptide Synthesis, Ionspray-MS, Chiral Gas-chromatography A new trityl-linker for the strategy of combined solid phase and solution

Alio-Verbindungen mit ungewöhnlichem Verhalten bei der Gaschromatographie an chiraler stationärer Phase Allo-Compounds with Unusual Behaviour in Gas Chromatography Using Chiral Stationary Phase Ernst Küsters* und Willy Rahmen Analytische Forschung und Entwicklung der Sandoz A G , Division Pharma, CH-4002 Basel Z. Naturforsch. 43b, 619-622 (1988); eingegangen am 15. April/30. November 1987 Enantiomeric Separation, Gaschromatography, Chirasil-Val, Allo-Compounds, Chiral Recognition The Separation of the enantiomers of D,L-allo-threoninol, necessary in

Gaschromatographic, Mass- and Infrared-Spectrometric Identification of Cyclic Adenosine-3': 5'-monophosphate (c-AMP) in Maize Seedlings (Zea mays) Boris Janistyn Institut für Pharmazeutische Biologie der Universität Freiburg i. Brsg. Schänzlestr. 1, D-7800 Freiburg i. Brsg. Z. Naturforsch. 36 c, 193-196 (1981); received November 11,1980 Maize, c-AMP, Gaschromatography, Mass Spectrometry, Infrared Spectrometry Gaschromatographic, mass- and infrared-spectrometric evidence is presented for the iden­ tification of adenosine-3':5'-monophosphate (c-AMP) in maize

The Composition of Terpene Hydrocarbons in the Essential Oils from Leaves of Four Cistus Species Paul-Gerhard Gülz Botanisches Institut der Universität Köln, Gyrhofstr. 15, D-5000 Köln 41 Uwe Kobold, Karl Michaelis, and Otto Vostrowsky Institut für Organische Chemie der Universität Erlangen-Nürnberg, Henkestr. 42, D-8520 Erlangen, Bundesrepublik Deutschland Z. Naturforsch. 39c, 699-704 (1984); received March 16, 1984 Essential Oils, Gaschromatography/Mass Spectrometry, Terpene Hydrocarbons, Cistus spp., Cistaceae The hydrocarbon fractions o f the essential