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  • 1
    Electronic Resource
    Electronic Resource
    Primary aldosteronism with bilateral adrenal adenomas (1980)
    Springer
    Virchows Archiv 388 (1980), S. 229-236 
    Details
    ISSN: 1432-2307
    Keywords: Primary aldosteronism ; Computerized tomography ; Adrenal cortex neoplasms ; Spironolactone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary An unusual case of primary aldosteronism with bilateral single adenomas is reported. The two tumors were revealed by computerized axial tomography and subsequently confirmed by surgical exploration. Spironolactone therapy prior to the operation induced the formation of spironolactone bodies in only one of the two adenomas. As it has been postulated that these cytoplasmic inclusions may reflect the activity of the adenomatous cells, the presence of the bodies in a single adenoma would indicate a unilateral source of the hyperaldosteronism. Thus, the existence of spironolactone bodies could corroborate the data of functional localizing tests more closely than the morphological findings of computerized tomography.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00430691
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  • 2
    Electronic Resource
    Electronic Resource
    Mikromechanisches stochastisches Versagensmodell uniaxial faserverstärkter Verbundwerkstoffe (1991)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 22 (1991), S. 39-47 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Micromechanical stochastic failure model of uniaxial fibre-reinforced compositesA theoretical model of stress transfer between a transversal isotropic fibre and the surrounding matrix material in a uniaxially fibre-reinforced composite near a single matrix flaw is discussed including friction controlled fibre-matrix interface debonding. The rise of fracture toughness due to frictional fibre sliding is studied accounting for Weibull strength distribution of fibres. The total dissipative work may be used as figure of merit regarding the damage tolerance. A critical evaluation is presented concerning some previous models of local failure probabilities. Numerical results are demonstrated. Conditions for an optimized C/Al-composite are presented.
    Notes: Es wird ein theoretisches Modell der Lastübertragung zwischen monoklin anisotroper Faser und dem umgebenden Matrixmaterial in uniaxial faserverstärkten verbunden nahe eines Matrixfehlers diskutiert welches eine-reibungsbehaftete Grenzflächenablösung zwischen beiden Materialkomponenten einbezieht. Die Zunahme der Bruchzähigkeit infolge Fasergleiten delaminierter Faserstücke wird untersucht. Dabei wird eine Weibullverteilung der Faserzugfestigkeiten vorausgesetzt. Die gesamte dissipative Arbeit kann als Gütezahl zur Bewertung der Schadenstoleranz verwendet werden. Es erfolgt eine kritische Bewertung von einigen aus der Literatur bekannten Modellansätzen zu lokalen Versagenswahrscheinlichkeiten Numerische Ergebnisse werden vorgestellt. Bedingungen für einen optimierten C/Al Verbund werden genannt.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19910220202
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  • 3
    Electronic Resource
    Electronic Resource
    Power requirements of gas-liquid agitated systems (1962)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 8 (1962), S. 262-266 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Power data for dispersion of air in liquids by means of a six-bladed flat blade turbine are presented in the form of a logarithmic plot of actual power consumed against a function of speed, impeller diameter, gas flow rate, and impeller power characteristics. The data are those of Michel (7), Bimbenet (2), Sachs (12), and Oyama and Endoh (10).Turbines of from 3- to 8-in. diameter were run in tanks of from 6.5- to 18-in. diameter, with the D/T never exceeding 0.47. The fluids tested covered a density range of 0.8 to 1.65 g./ml. and a viscosity range of 0.9 to 100 centipoises.Data are also presented on dispersion of air in a 50% by volume batch of carbon tetrachloride in water and dispersion of air in a suspension of Alundum particles in water, and compared with data on water in a similar system.The qualitative effect of a surface active agent is demonstrated in a comparison of data for a 0.1% by weight mixture of Pluronic L-62 in water with data for pure water with the same apparatus.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690080226
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  • 4
    Electronic Resource
    Electronic Resource
    Mixing in viscous liquids (1970)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 16 (1970), S. 903-906 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Detailed data are reported for blend time and turnover time with a 17-in. impeller operating in an 18-in. diameter tank. Above 1,500 centipoises, viscosity had no effect on blend time at constant speed. Blend time was inversely proportional to speed.The inner flight of a helical impeller is of value when blending pseudoplastic fluids but has no effect on blend time with Newtonian fluids. The ratio of blend time to turnover time is given, as well as the effect of several different helical impeller geometry variables.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690160608
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  • 5
    Electronic Resource
    Electronic Resource
    Relaxations in thermosets. X. Analysis of dipolar relaxations in DGEBA-based thermosets during isothermal cure (1991)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 29 (1991), S. 1127-1135 
    Details
    ISSN: 0887-6266
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Dielectric properties measured during isothermal curing of DGEBA-based thermosets using a mixture of aromatic amines as curing agent are analyzed. The evolution of the dielectric features of thermosets during curing and after a time when their dc conductivity has reached a negligibly small value are phenomenologically similar to the dielectric features of physically and chemically stable dipolar liquids and solids observed with increasing frequency or decreasing temperature. This equivalence is a consequence of the invariance of the dynamic behavior of dielectric susceptibility with respect to either the frequency of measurement or the relaxation time of the substance and demonstrates that crosslinking of a thermoset causes its relaxation time to increase monotonically.It is shown that the stretched exponential relaxation function formalism satisfactorily describes the dielectric results and that the value of its distribution parameter initially decreases and, after gelation, reaches a constant value, which we denote γ, in the latter part of the cure. The value of the curing parameter, γ, which lies between 0.2 and 0.4, monotonically decreases with increasing curing temperature and tends to a limiting value characteristic of a thermoset at higher temperatures. This is in contrast with the increase found in the corresponding representation in the Kohlrausch-Williams-Watts parameter β with increasing temperature. The curing time dependence of the dipolar relaxation time ι has been determined and found to have the shape of an elongated S, with a well-defined point of inflexion, as ι increases during the cure, from a value characteristic of a liquid to an ultimate value characteristic of a glass.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1991.090290911
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  • 6
    Electronic Resource
    Electronic Resource
    Relaxations in thermosets. IX. Ionic conductivity and gelation of DGEBA-based thermosets cured with pure and mixed amines (1991)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 29 (1991), S. 1117-1125 
    Details
    ISSN: 0887-6266
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The results obtained during the isothermal curing of diglycidyl ether of bisphenol-A-based thermosets cross-linked with pure diaminodiphenyl methane and pure diaminodiphenyl sulfone and with their mixtures have been analyzed to determine how the dc conductivity changes with time during the conversion of its liquid to a gel. The complex permittivity data are first analyzed to show that ac measurements can be used to obtain the ionic conductivity over a considerable period of the curing process. The procedure allows one to obtain the dc conductivity without having data as a function of frequency. The shape of the complex plane plots of the electrical modulus are semicircles, but with small deviations that appear at long times during the curing process. The dielectric consequences of the chemical changes with time during the cross-linking of the thermoset are analogous to the frequency dependence of the complex permittivity of a liquid. The analysis shows that the dc conductivity σo of a thermoset during its cure follows a power law, σo∝ (tg - t)x, where t is the curing time (t 〈 tg). The results can also be described equally well by a new equation, σo ∝ exp[ - B/(to - t)], where x, tg, B, and to are empirical constants all of which vary with the temperature of the cure. tg is close to the time for gelation known from independent studies and to is close to but longer than the time for vitrification. These conclusions are discussed in terms of scaling concepts for the gelation phenomenon.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1991.090290910
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  • 7
    Electronic Resource
    Electronic Resource
    Einfluß der Tropfengröße auf die Verbrennung von HeizölKurzfassung des Vortrages auf dem Jahrestreffen der Verfahrens-Ingenieure, 1. bis 3. Oktober 1968 in Stuttgart. - Die ausführlichen Versuchsergebnisse werden nach Abschluß voraussichtlich Ende 1969 veröffentlicht werden. (1969)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 41 (1969), S. 339-340 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330410522
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