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  • Polymer and Materials Science  (11)
  • Chemical Engineering  (1)
  • absorption  (1)
  • combined analysis  (1)
  • glucose tolerance test  (1)
  • pancreas  (1)
Collection
Keywords
Publisher
Years
  • 1
    Electronic Resource
    Electronic Resource
    Thyrocyte morphology and function in alimentary obesity: An ontogenetic approach (1982)
    Springer
    Bulletin of experimental biology and medicine 94 (1982), S. 1441-1445 
    Details
    ISSN: 1573-8221
    Keywords: thyrocytes ; experimental alimentary obesity ; combined analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00827224
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of oral administration of insulin with a synthetic polymer on alloxan diabetes (1983)
    Springer
    Bulletin of experimental biology and medicine 95 (1983), S. 357-359 
    Details
    ISSN: 1573-8221
    Keywords: combination of insulin with synthetic polymer ; alloxan diabetes ; oral administration ; blood glucose level ; absorption
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00830190
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  • 3
    Electronic Resource
    Electronic Resource
    Development of diabetes mellitus in the offspring of female rats with alloxan diabetes in six generations (1988)
    Springer
    Bulletin of experimental biology and medicine 105 (1988), S. 15-17 
    Details
    ISSN: 1573-8221
    Keywords: alloxan diabetes ; glucose tolerance test ; latent and manifest diabetes ; hypoglycemia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00835444
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  • 4
    Electronic Resource
    Electronic Resource
    Relation of initial supermolecular organization in crystalline polymer systems to the organization produced by stretching (1970)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 8 (1970), S. 1015-1026 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: An investigation of small-angle scattering produced by polarized light from stretched and annealed polymer systems containing spherulites yields information on the supermolecular transitions that occur during such treatment. A series of semicrystalline polymer systems (films, fibers) show that stretching leads to deformation of spherulites and subsequent transformation to an orientational supermolecular order. The size of the single element C2 of the supermolecular order in the direction of stretching, determined from the distance between the layer lines of the scattering pattern, is related to the diameter D0 of the initial spherulites by the relation C2 = KD0λs, where λ, is the draw ratio of the macrosystem and K is a parameter determining the deformability of the spherulites. For polyethylene at room temperature K is unity and for polychloroprene it is 1.2. Changes of C2 after annealing and restretching of the systems also obey this ratio.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1970.160080701
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  • 5
    Electronic Resource
    Electronic Resource
    State of the pancreatic islets, fetal weight, and glucose tolerance test in offspring of male rats with alloxan diabetes (1974)
    Springer
    Bulletin of experimental biology and medicine 78 (1974), S. 999-1001 
    Details
    ISSN: 1573-8221
    Keywords: alloxan diabetes ; heredity ; pancreas
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The body weight and morphometric parameters of the state of the pancreatic insular apparatus (the relative percentage of islet tissue, of A- and B- cells, the number of islets) in fetuses and the adult offspring of healthy female rats and male rats with alloxan diabetes were studied. No change in these parameters was found, indicating that under these conditions the genetic systems of the males are undamaged and that these lesions are not transmitted to the progeny. On the basis of these findings and of the importance of diabetes in the female in the development of insular deficiency in the progeny demonstrated previously, the role of the environment in which the fetus develops in the formation of the diabetes is emphasized.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00796647
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  • 6
    Electronic Resource
    Electronic Resource
    Topomorphic states and phase transitions connected with the crystallization of polymersPresented at the 5th Discussion Conference on Phases and Interphases in Polymers, Prague (1976) (1980)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 20 (1980), S. 206-211 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The crystallization of flexible-chain molecules of different degrees of coiling is considered. The nature of the phase transition during crystallization is discussed. The revision of established notions on phase transitions in polymers leads to the concept of crystalline topomorphism, i.e., the existence of two crystalline types with different modes of packing of macromolecules in the macroscopic crystal though they belong to the same lattice class: folded-chain crystal (FCC) and extended-chain crystal (ECC). Phase diagrams in coordinates of degree of coiling vs temperature are plotted. The values of molecular orientation and temperatures at which each of both mechanisms of crystallization takes place are evaluated. The mechanisms of ECC growth under equilibrium conditions and under conditions of molecular orientation are discussed. It is shown that the melting of ECC obtained by the process of orientational crystallization is a second order phase transition, being analogous to a crystal-nematic phase transition. At the same time the melting of FCC provides all the features of a first order transition.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760200307
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  • 7
    Electronic Resource
    Electronic Resource
    X-ray studies of smectic-crystal and crystal-smectic transition in oriented polypropylene (1982)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 33 (1982), S. 483-485 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Kristallisation von Polypropylen im orientierten parakristallinen Zustand und der Übergang in den smektischen Zustand beim isometrischen Schmelzen der kristallisierten Proben wurden untersucht. Die Ergebnisse werden unter der Annahme struktureller Umwandlungen der makromolekularen Helices interpretiert, was ein lokales Schmelzen der Helices voraussetzt.
    Notes: The results of the study of polypropylene crystallization from the oriented paracrystalline state and the transition to the smectic state observed during isometric melting of the samples crystallized in this manner are interpreted from the viewpoint of structural transition in helical polypropylene macromolecules inevitably involving the local melting of helices.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1982.010330808
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  • 8
    Electronic Resource
    Electronic Resource
    Phenomenon of superheating in the melting of oriented samples of flexible-chain polymers (1983)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 34 (1983), S. 390-395 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Eine Theorie der Überhitzung, d. h. der Zunahme der Schmelztemperatur Tm orientierter Proben von Polymeren mit flexiblen Ketten mit der Aufheizgeschwindigkeit, wird vorgestellt. Die Berechnungen zeigen, daß Tm beim Erwärmen unter isometrischen Bedingungen höher ist als unter Gleichgewichtsbedingungen. Aus einer Analyse der Schmelzkinetik folgt, daß Ursache der Überhitzung die unvollständige Relaxation amorpher Kettenteile ist. Tm nimmt mit der Aufheizgeschwindigkeit zu und nähert sich dem unter isometrischen Bedingungen erhaltenen Wert.
    Notes: A theory of the superheating phenomenon, i.e. the increase of the melting temperature Tm, of oriented samples of flexible-chain polymers with the heating rate, is presented. Calculations show that Tm is higher on heating under isometric conditions than under equilibrium conditions. Analysis of the kinetics of melting suggested that the reason for superheating is the incomplete relaxation of amorphous chain parts. Moreover, Tm increase with the heating rate tending to the value of Tm under isometric conditions.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1983.010340703
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  • 9
    Electronic Resource
    Electronic Resource
    Effect of defective boundary layer on nucleation at the crystallization of oriented polymer melts (1983)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 34 (1983), S. 385-389 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Keimbildung bei der Kristallisation von orientierten Polymerschmelzen wurde thermodynamisch analysiert. Die Analyse basiert auf einem Strukturmodell des amorphen Polymers und berücksichtigt den Einfluß solcher Defekte wie Schlaufen und tie-Ketten an den Grenzflächen des sich bildenden Keims. Gleichungen für verschiedene Parameter, die den Prozeß der Orientierungskristallisation charakterisieren, werden abgeleitet. Es wurde festgestellt, daß Schlaufen und Faltungen, die auf der Oberfläche des Keims auch bei hohen Orientierungsgraden bestehen bleiben können, eine Zunahme der Potentialbarrieren für die Keimbildung und eine Abnahme der Schmelztemperatur bewirken.
    Notes: A thermodynamic analysis of nucleation during the crystallization of oriented polymer melts was performed. It is based on a model of the structure of the amorphous state of polymers and takes into account the generalized effect of such defects as loops and tie-chains on the end surface of the nuclei being formed. Equations are derived for various parameters characterizing the process of orientational crystallization. It is found that loops or folds which can remain on the nucleus surface even at high degrees of orientation may lead to an increase in the potential barriers to nucleation and a decrease in the melting temperature.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1983.010340702
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  • 10
    Electronic Resource
    Electronic Resource
    Behandlung von Phasenumwandlungen in Polymeren unter dem Aspekt der Konformation (1979)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 30 (1979), S. 601-605 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Based on the concept of phase dualism of a polymer system, by which the Gibbs free energy is considered to consist of a liquid-like and a gas-like component, the effect of conformational states in phase transitions (second order transition, crystallization) is explained. Particularly, the performed analysis shows that hypothetical phase transitions suggested by Gibbs and DiMarzio as well as by De Gennes can be realized under the effect of an external mechanical force field. Further, the pecularities of flowing polymer systems are explained by these phase transitions.
    Notes: Ausgehend vom Konzept eines Phasendualismus des Polymersystems, nach dem die Gibbssche freie Energie eine flüssigkeitsähnliche und eine gasähnliche Komponente besitzt, wird der Einfluß der Konformationszustände auf die Phasenumwandlungen (Glasübergang, Kristallisation) im Polymer aufgezeigt. Insbesondere ergibt die durchgeführte Analyse, daß bei Einwirkung eines äußeren mechanischen Kraftfeldes die von Gibbs und DiMarzio sowie von De Gennes beschriebenen hypothetischen Phasenübergänge realisiert werden können. Weiter werden die beim Fließen polymerer Systeme beobachteten Besonderheiten mit Hilfe dieser Phasenübergänge gedeutet.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1979.010301001
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