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  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Macmillan Magazines Ltd.
    Nature 388 (1997), S. 751-753 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Globular clusters, the most ancient stellar groups in our galaxy, are known to contain bright X-ray sources, faint X-ray sources and millisecond pulsars. The bright X-ray sources are neutron stars accreting matter from a companion star, and the millisecond pulsars are believed to be descendants ...
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Industrial and engineering chemistry 11 (1972), S. 543-546 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Industrial and engineering chemistry 17 (1978), S. 373-374 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Industrial and engineering chemistry 18 (1979), S. 300-300 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Nuclear Instruments and Methods in Physics Research Section A: 326 (1993), S. 129-135 
    ISSN: 0168-9002
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1433-0407
    Keywords: Schlüsselwörter Tachyarrhythmie ; Kardioverter Defibrillator ; Psychogene Triggerung ; Emotional-kognitive Faktoren ; Key words Tachyarrhythmia ; Implantable cardioverter defibrillator ; Emotional stress ; Psychic arousal
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Tachyarrhytmias often occur during increased emotional arousal or mental excitation. The implantable cardioverter defibrillator (ICD) allows the exact documentation of arrhythmic episodes and their time of onset. Therefore, the type of arrhythmia can be differentiated as well as the circumstances surrounding the event. These features allow the assessment of possible psychic arrhythmogenic factors in the natural environment. We analyzed the ICD-protocols of three male patients (in ages between 60 and 68), whose devices had successfully terminated a ventricular tachycardia and compared the onset of the episodes with the patients' detailed descriptions of the corresponding life situations. The analysis of the circumstances at the time of arrhythmia-onset revealed a relationship between the occurrence of life-threatening arrhythmias in natural environment and emotional stress. The stressors could be defined as situations of increased vulnerability leading to sympathetic excitation. The induction of tachyarrhythmia was promoted in case 1 by acute psychic distress (public speaking), by the increasing panic-attack-like vicious circle of the cognitive anticipation of an unfavorable outcome (case 2), and an adverse anger reaction superimposed on persistent feelings of help- and hopelessness (case 3). These findings are in line with several experimental and epidemiological studies providing evidence for a relationship between psychic arousal and the induction of tachyarrhythmias. The knowledge of emotional and mental factors that function as a trigger for arrhythmias may lead to new therapeutic approaches in the prevention of sudden cardiac death.
    Notes: Zusammenfassung Tachyarrhythmien treten häufig während erhöhter psychischer Erregung auf. Bei Patienten, bei denen ein Kardioverter Defibrillator (ICD) implantiert wurde, lassen sich arrhythmische Episoden und deren Onset-Zeitpunkt exakt aufzeichnen und erlauben so einerseits die Differenzierung der aufgetretenen Rhythmusstörung und andererseits eine detailliertere Analyse der situativen Umstände und möglicher an der Auslösung beteiligter psychischer Komponenten. In der vorliegenden einzelfallbezogenen Studie wurden bei 3 männlichen Patienten im Alter zwischen 60 und 68 Jahren, bei denen der ICD erfolgreich eine ventrikuläre Tachykardie terminiert hatte, die ICD-Protokolle und die damit korrespondierenden Patientenaussagen analysiert. Die Analyse der akuten Onset-Bedingungen konnte ausgeprägte Zusammenhänge zwischen lebensbedrohlichen Herzrhythmusstörungen in natürlicher Umgebung und emotionalen Stressoren aufdecken. Als Stressoren wurden unterschieden eine vulnerable Situation, die eine psychogene Triggerung maligner Arrhythmien bewirkte (Fall 1); eine Panikepisoden-ähnliche Erwartungsspannung (Fall 2) sowie eine aversive Ärgerreaktion, die auf dem Boden eines andauernden Zustandes von Hilf- und Ausweglosigkeit (Fall 3) einen besonders potenten sympathiko-exzitatorischen Stimulus darstellt. Dieses Ergebnis deckt sich mit einer Reihe von laborexperimentellen und epidemiologischen Studien, die einen Zusammenhang zwischen psychischer Erregung und der Entstehung von Tachyarrhythmien belegen. Die Berücksichtigung emotional-kognitiver Faktoren bei der Arrhythmogenese könnte ein Beitrag bei der Therapie zur Prävention des plötzlichen Herztodes werden.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Experimental astronomy 4 (1993), S. 105-116 
    ISSN: 1572-9508
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Charged particle fluxes on satellites in highly eccentric Earth orbits are studied, using data from ISEE1 and EXOSAT missions. The effects of minimum-ionizing particles, low-energy electrons and secondary radiation produced by these particles on CCDs used as X-ray detectors are identified. A technique to discriminate events caused by minimum-ionizing particles from X-ray events is proposed. The need for a deflecting system against low-energy electrons with focusing X-ray optics is demonstrated. An expected secondary radiation spectrum behind a typical detector shielding based on Monte-Carlo-simulations is presented. For the EPIC detectors on XMM, detection rates due to this radiation environment are estimated.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1572-8757
    Keywords: coalbed methane ; coal (porous structure, micropores) ; adsorption (of xenon, carbon dioxide, methane) ; Xe-129 NMR spectroscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract An experimental and theoretical study of adsorption and diffusion of carbon dioxide and methane in coals of widely varying rank was carried out. Low pressures adsorption isotherms of CO2 were obtained and analyzed using Dubinin's theory of volume filling of micropores. High-pressure adsorption isotherms of CH4 were obtained and analyzed using tracer pulse chromatography in conjunction with an appropriate adsorption/diffusion model. A preliminary129Xe NMR analysis of chemical shifts experienced by xenon atoms in particles of different sizes is also reported. The heretofore undocumented and/or underestimated effects of activated diffusion of CO2 at 273–298 K complicate the elucidation of the true microporous structure of coals, especially its dependence on coal rank. Activated diffusion of both CO2 and methane at room temperature does not allow reliable estimates of coalbed gas content to be made. A model of an interconnected network of pores which includes randomly distributed, numerous and ultramicroporous constrictions (at any size scale) is consistent with all these experimental and theoretical findings.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 31 (1985), S. 2075-2081 
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The vacancy solution model of adsorption which uses an activity coefficient equation of the Wilson form has been improved (1) by incorporating temperature dependency into the model, and (2) by development of a functional relationship between the adsorbate-adsorbate binary interaction parameters. This reduces the number of regression parameters and improves the predictive capabilities of the model. Comparisons of this improved model with the Flory-Huggins activity coefficient form of the vacancy solution model are presented for binary and ternary systems. For a priori predictions from pure-component data, the Flory-Huggins form is recommended. If experimental binary data are available for all pairs, the form that most accurately correlates the binary data should be used to predict higher-order systems.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 32 (1986), S. 1138-1145 
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A recently developed error-in-variables method of calculating regression parameters was applied to the modeling of gas-solid adsorption equilibria. The method accounts for error in all experimental variables in the regression calculations. Regression coefficients from pure component data calculated by the new method were used to predict multicomponent equilibria. The multicomponent predictions using pure component parameters calculated by the error-in-variables method were more accurae than predictions using parameters calculated by conventional least-squares regression.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
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