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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Industrial and engineering chemistry 15 (1976), S. 400-406 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Industrial and engineering chemistry 16 (1977), S. 89-94 
    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. 27-33 
    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 14 (1975), S. 315-322 
    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
    s.l. : American Chemical Society
    Industrial and engineering chemistry 14 (1975), S. 368-372 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1435-1803
    Keywords: Hypertrophie ; Windhunde ; Funktion des linken Ventrikels
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bisher hat man dem trainierten Windhund als Versuchstier wenig Aufmerksamkeit geschenkt, trotz des vielen Interesses für den Einfluß, welchen das Trainieren auf das Myokard ausübt, und trotz des Mangels an Tiermodellen, welche die zur Herzhypertrophie führenden Umstände imitieren. Vorliegende Untersuchung vergleicht zwei Gruppen betäubter trainierter Windhunde (insgesamt 20 Tiere, von denen 12 mehrmals untersucht wurden, 8 aber zwecks pathologischer Untersuchung geopfert wurden) mit 3 abtrainierten Windhunden und 6 ungefähr gleichgroßen Mischhunden. Die arteriellen Blutdrücke, Rechts- und Linksherzdrücke, mechanische Funktion und Indizes der diastolischen Aktivität wurden verglichen. Alle gemessenen Indizes der Kontraktilität (dP/dt, dP/dtDP40, Vce und Vmax) waren bei den trainierten Windhungen niedriger als bei den Mischhunden, obwohl kein Index für sich von statistischer Bedeutung war. Bei diastolischer Funktion wurden zwischen den trainierten Windhunden und den Mischhunden kein Unterschied von Bedeutung gefunden. Wegen der kleinen Anzahl von Versuchstieren und wegen des Gebrauchs von einem Betäubungsmittel ist bei der Interpretation der Resultate Vorsicht geboten. Nichtsdestoweniger ist es möglich, daß die unerwartet niedrige Kontraktilität, die man in den trainierten Windhunden vorgefunden hat, einen gesteigerten parasympathischen Einfluß in der Nachtrainingsperiode darstellt. Die normale diastolische Funktion des linken Ventrikels im trainierten Windhund steht im Gegensatz zur anormalen diastolischen Funktion von Modellen chronischen Überdrucks.
    Notes: Summary Despite much interest in the effects of exercise on the myocardium, and the need to develop animal models which mimic conditions leading to cardiac hypertrophy, little attention has been focused on the trained racing greyhound. The current study compared two groups of anesthetized trained racing greyhounds (a total of 20 animals, 12 of whom were maintained for serial studies and 8 of whom were sacrificed for anatomic correlations) with 3 detrained greyhounds and 6 comparably sized mongrels. Systemic blood pressures, right and left heart pressures, ventricular mechanics and indices of diastolic behavior were compared. All measured indices of contractility (dp/dt, dp/dtDP40, Vce and Vmax) were lower in trained racing greyhounds than in mongrels although none achieved statistical significance. No significant difference in diastolic behavior was found between trained greyhounds and mongrels. While caution should be applied because of the small numbers of animals and the use of anesthesia, the lower than expected contractility found in trained racing greyhounds may reflect increased parasympathetic tone in the immediate post-training period. The normal diastolic behavior of the trained greyhound left ventricle contrasts to abnormal diastolic behavior found in models of chronic pressure overload.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1435-1803
    Keywords: cardiac hypertrophy ; exercise ; greyhounds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Exercise-induced cardiac hypertrophy has been associated with normal resting left ventricula function and, after cessation of training, variable degrees of regression. The racing greyhound is as animal with cardiac hypertrophy said to be part congenital and part exercise-induced. Racing grcy hounds underwent serial cardiac catheterization three times during an 8-month period after cessation racing/training to determine the functional consequences of the cessation of training. At the end ci 8 months of inactivity the animals' hearts were excised and weighed in order to compare heart weight body weight (HW/BW) ratios with those obtained in a group of racing greyhounds killed within one month, 19±16 days (mean±SD), of the cessation of training. Comparison of HW/BW ratios failed to reveal a significant difference between the serially studied group, 12.1±1.9 g/kg (mean±SD), and the more recently exercising group, 12.7±1.4 g/kg (mean±SD) of dogs. After 2 months of inactivity, 9 ol 12 greyhounds in the serially studied group showed increases in max dP/dt and dP/dt normalized to pressure of 50 mm Hg. Modified pre-ejection period and peak negative dP/dt also increased significantly (p〈.004) during this same period. No further changes in these variables were found at the final 8-month study. Our failure to demonstrate a difference in HW/BW ratios between these two groups or dogs suggests that the exercise-induced component of cardiac hypertrophy in the trained racing greyhound is probably very small and, if it exists, regresses very carly (〈1 month). Changes in contractility indices that were observed occurred after this time period (between 1 and 2 months) and are therefore probably not due to regression of cardiac hypertrophy.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 16 (1970), S. 754-761 
    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 finite difference technique has been developed which is suitable for the derivation of feedforward control algorithms for the control of distributed parameter processes. The method embodies both steady state and transient feedforward compensation.An experimental study, involving closed loop, on line, analogue computer control of a simple distributed parameter process proves the feasibility of the finite difference technique. The process under study is a steam water heat exchanger subject to inlet temperature forcing and controlled by flow rate manipulation. The new technique yielded significantly improved results when compared with the performance of a conventional two-mode feedback controller, or a linearized feedforward control algorithm.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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