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  • Analytical Chemistry and Spectroscopy  (13)
  • Industrial Chemistry  (13)
  • Hydrothermal vent
  • Marfan syndrome
Document type
Keywords
Publisher
Years
  • 1
    Electronic Resource
    Electronic Resource
    The Marfan syndrome —analysis of growth and cardiovascular manifestation (1990)
    Springer
    European journal of pediatrics 149 (1990), S. 452-456 
    Details
    ISSN: 1432-1076
    Keywords: Marfan syndrome ; Cardiovascular manifestation ; Height and weight per centiles
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Forty-eight children and adolescents (mean age 10.5 years, range 1.25–18 years) with clinical evidence of Marfan syndrome were studies. Height and weight percentiles were established. Cardiac dimensions and morphology were studied by M-mode and 2D-echocardiography. At diagnosis left atrial and left ventricular end-diastolic diameter and left ventricular posterior wall thickness were within normal limits except in a few adolescent patients. Interventricular septum was thickened in about 20% and aortic diameter increased in 56% of the patients. An additional 13% of patients developed aortic dilation during the study period. At diagnosis regression analysis revealed a significant (P〈0.05) correlation of the aortic diameter, septal thickness and the posterior left ventricular wall thickness and body surface area. Follow up studies of 19 patients allowed documentation of the development of aortic root dilation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01959393
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  • 2
    Electronic Resource
    Electronic Resource
    pH-Dependent metabolism of thiosulfate and sulfur globules in the chemolithotrophic marine bacterium Thiomicrospira crunogena (1990)
    Springer
    Archives of microbiology 154 (1990), S. 231-238 
    Details
    ISSN: 1432-072X
    Keywords: Chemolithotroph ; Thiomicrospira ; Thiosulfate ; Sulfur globules ; Sulfur-oxidizer ; Hydrothermal vent
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Respiring cells of the chemolithotrophic bacterium Thiomicrospira crunogena produced sulfur globules from the sulfane sulfur of thiosulfate below pH 7, and consumed the globules above pH 7. The switch in metabolism was immediate and reversible upon titration of the culture. The consumed sulfur globules remained in a membrane-bound form and were not oxidized unless the medium was depleted of thiosulfate. Sulfur globule production but not uptake was blocked by azide. Anoxia, thiol-binding agents, and inhibitors of protein synthesis blocked globule uptake. Transitory accumulations of sulfite and polythionates appeared to be reaction products of thiosulfate and sulfur globules. A model depicting the pH sensitivity and biochemistry of sulfur globule production and consumption is proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00248960
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  • 3
    Electronic Resource
    Electronic Resource
    Pressure pulsations in the piping of reciprocating pumps (1987)
    Weinheim : Wiley-Blackwell
    Chemical Engineering & Technology - CET 10 (1987), S. 262-271 
    Details
    ISSN: 0930-7516
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Pressure pulsations in hydraulic systems, generated by reciprocating pumps, can cause serious problems with regard to plant safety and reliability. In particular, fatigue problems arise in high-pressure piping systems. The available knowledge is not sufficient for an accurate computation of pressure peaks in the piping of reciprocating pumps. A number of calculation models are available which, however, neglect both fluid compressibility and friction. This contribution presents a calculation method which allows a precise modelling of various pump installations. Comparison of calculated and experimental data shows a good agreement and provides a validation of the computational model.
    Additional Material: 18 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ceat.270100132
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  • 4
    Electronic Resource
    Electronic Resource
    Gas chromatographic separation of chiral organochlorines on modified cyclodextrin phases and results of marine biota samples (1997)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 20 (1997), S. 85-93 
    Details
    ISSN: 0935-6304
    Keywords: Capillary gas chromatography ; Modified cyclodextrin phases ; Chiral organochlorines ; Biological samples ; Enantiomeric ratios ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Four chiral stationary phases containing modified cyclodextrines diluted in or chemically bonded to a non-chiral phase were used to resolve chiral organochlorine compounds such as α-hexachlorocyclohexane (α-HCH), perdeuterated α-HCH (α-PDHCH), β-and γ-pentachlorocyclohexene (PCCH), oxychlordane, cis-and trans-chlor- dane, cis- and trans-heptachlorepoxide, PCB 95, PCB 132, PCB 149, and Chiral tozaphenes.The elution order was determined by analyzing standards with known enantiomeric excesses.Furthermore, an internal standard was used to even out slight variations in the ratio of peak hights of enantiomers which were determined from injection to injection.None of the chiral stationary phases resolved all chiral organochlorine compounds. However, the β-TBDM(35% heptakis (6-O-t-butyldimethylsilyl-2,3-di-O-methyl)-β-cyclodextrin in OV 1701) column allowed the separation of all compounds under investigation except for PCB 95 and chiral toxaphenes.Emphasis was placed on the separation of as many as possible enantiomers on a chiral phase by application of one temperature program and with respect to unambiguous quantitation of biological samples such as bludder and liver of marine and terrestrial mammals.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240200208
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  • 5
    Electronic Resource
    Electronic Resource
    Synthesis, isolation, and chromatography of perdeuterated α-1,2,3,4,5,6-hexachlorocyclohexane (1995)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 18 (1995), S. 643-646 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography/Mass spectrometry ; Chiral GC ; Deuterium-labeled compounds ; Hexachlorocyclohexane ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Perdeuterated α-1,2,3,4,5,6-hexachlorocyclohexane (α-PDHCH) was synthesized and isolated in pure form. α-PDHCH was baseline separated from unlabeled α-HCH by high resolution gas chromatography on different stationary phases. α-PDHCH was also resolved into its enantiomeric forms by application of a chiral GC phase. Furthermore, chiral chromatography of a mixture of labeled α-PDHDH and unlabeled α-HCH resulted in four peaks. Standard solutions of α-PDHCH are recommended both as recovery standard for sample clean-up and as internal standard for the quantitation of chlorinated hydrocarbons with GC/MS or GC/ECD in environmental samples.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240181006
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  • 6
    Electronic Resource
    Electronic Resource
    F. W. McLafferty, F. Turecek. Interpretation of mass spectra. Fourth edition (1993). University Science Books, Mill Valley, California (1994)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 23 (1994), S. 379-379 
    Details
    ISSN: 1052-9306
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200230614
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  • 7
    Electronic Resource
    Electronic Resource
    (S) -TroloxTM methyl ether, a powerful derivatizing reagent for the determination of the enantiomeric purity of chiral alcohols by GC and SFC with achiral columns (1992)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Microcolumn Separations 4 (1992), S. 45-49 
    Details
    ISSN: 1040-7685
    Keywords: capillary gas chromatography ; capillary supercritical fluid chromatography ; enantiomeric alcohols ; diastereomeric esters ; Trolox methyl ether ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The enantiomers of aliphatic alcohols are transformed by a new chiral reagent (S)-Trolox methyl ether to their diastereomeric esters which are separated by capillary GC or SFC on achiral columns. The applicability of this reagent and its superiority to the hitherto known reagents are demonstrated by selected examples.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mcs.1220040109
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  • 8
    Electronic Resource
    Electronic Resource
    Untersuchungen an Dosierpumpen für die VerfahrenstechnikVortrag auf dem Jahrestreffen der Verfahrens-Ingenieure, 6. bis 8. Oktober 1963 in Hannover. (1964)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 36 (1964), S. 185-191 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Die Anwendungsmöglichkeiten von Dosierpumpen in der Verfahrenstechnik werden durch Fördermedium, Druck, Temperatur und Fördermenge bestimmt. Das Förderverhalten oszillierender Verdrängerpumpen ist vor allem von der Kompressibilität, der Viscosität und dem Dampfdruck des Fördermediums abhängig. Untersuchungen zur Ermittlung der Dosiergenauigkeit bei verschiedenen Bedingungen zeigen, daß Dosierpumpen bei geeigneter Ausführung und passenden Randbedingungen genau arbeiten. Für die Gewährleistung der Dosiergenauigkeit sind Maßnahmen erforderlich, um den Verschleiß niedrig zu halten. Besondere Anforderungen stellen Entwicklung und Bau von Dosierpumpen für Drucke bis 3000 at.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330360304
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  • 9
    Electronic Resource
    Electronic Resource
    Zur Berechnung und Gestaltung von Bauteilen mit Beanspruchung durch schwellenden InnendruckVorgetragen von G. Vetter auf der internen Arbeitssitzung des Fachausschusses „Hochdruck-Verfahrenstechnik“ der Verfahrenstechnischen Gesellschaft im VDI am 5. März 1968 in München; vgl. den Bericht über die Sitzung in dieser Ztschr. 40, 662/65 [1968]. (1968)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 40 (1968), S. 1215-1223 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Schwellende Innendruckbeanspruchungen treten in Behältern, Reaktoren, Rohrleitungen, Armaturen, Pumpen und Verdichtern auf. Bei Apparaten wird die schwellende Beanspruchung oft nur durch die Inbetriebnahme und den Abschaltvorgang verursacht, so daß die Lastspielzahl innerhalb der Lebenszeit des Bauteils klein ist. In diesen Fällen werden die Bauteile nach der Zeitfestigkeit ausgelegt. Bei Pumpen und Verdichtern jedoch ist die Lastspielzahl sehr hoch, so daß, abgesehen von wenigen Ausnahmen, eine Auslegung auf Dauerfestigkeit erforderlich ist. Die Bauteile des Pumpen- und Verdichterbaues, welche im Dauerbetrieb durch schwellenden Innendruck belastet sind, sowie die dafür verwendeten Werkstoffe werden auf den Hochdruckmaschinenbau abgestimmt, weshalb nur verhältnismäßig dickwandige Bauteile behandelt werden. Es werden Versuchsergebnisse mitgeteilt und Hinweise für die Auslegung, die Wahl des Werkstoffes und die Oberflächenbehandlung gegeben.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330402406
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  • 10
    Electronic Resource
    Electronic Resource
    Untersuchungen zur Kavitation bei oszillierenden VerdrängerpumpenVorgetragen vom erstgenannten Autor auf dem Jahrestreffen der Verfahrens-Ingenieure, 1. bis 3. Oktober 1968 in Stuttgart. (1969)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 41 (1969), S. 271-278 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: An einer Kolbenpumpe mit Acrylglas-Zylinder wird das Verhalten der Ventile ohne Kavitation und bei verschiedener Stärke der Dampfblasenbildung beobachtet und anhand von Ventilhub- und Druckabfallkurven diskutiert. Die Ergebnisse werden mit stationären Messungen verglichen. Es zeigt sich, daß bei nichtkavitierendem Pumpenbetrieb der Druckabfall im Saugventil aus den bei stationärer Strömung gemessenen Verlustbeiwerten ζv = f (Re) berechnet werden kann. Abschließend werden die Auswirkungen verschiedener Kavitationszustände auf das Betriebsverhalten der Pumpe beschrieben und Maßnahmen zur Vermeidung schädlicher Kavitation genannt.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330410510
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