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  • 1970-1974  (11)
  • 1
    Electronic Resource
    Electronic Resource
    Cinematographic observation of “surface contraction waves” (SCW) during the early cleavage of axolotl eggs (1971)
    Springer
    Development genes and evolution 167 (1971), S. 183-186 
    Details
    ISSN: 1432-041X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Prior to the appearance of the cleavage furrows circular or semicircular zones suggesting surface contraction originate at the future initiation point of the cleavage furrow. They expand and travel in animal-vegetative direction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00577039
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  • 2
    Electronic Resource
    Electronic Resource
    Fecundity of a euphasiid crustacean, Nematoscelis difficilis, in the North Pacific Ocean (1972)
    Springer
    Marine biology 14 (1972), S. 41-47 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The number, size, and carbon and nitrogen contents of eggs in the pouches of a euphausiid crustacean, Nematoscelis difficilis Hansen, were examined. A clear linear relationship exists between the number of eggs in the pouch and the body weight of the maternal euphausiid. The eggs are not spherical in shape, and the size of eggs is greater in larger egg masses. The carbon content of the egg masses (50.2%) is higher than that of the bodies (40.7%). The carbon: nitrogen ratio (C/N) is also higher in the egg masses than in the bodies of euphausiids. The carbon content of the eggs is equivalent to 28.4% of the body carbon, the nitrogen content to 19.2% of the body nitrogen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00365779
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  • 3
    Electronic Resource
    Electronic Resource
    Studies on adhesion of polyethylene (1970)
    Springer
    Colloid & polymer science 237 (1970), S. 311-316 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Oberflächenverhalten und Eigenschaften von Polyäthylen wurden hinsichtlich Adhäsion und chemischer Bindungsfestigkeit diskutiert. Der Bruch von Adhäsionsbindungen zwischen oxydativ aktiviertem Polyäthylen und Aluminium hat zwei Seiten: Einmal spielt die Konzentration an Fehlbaustellen in der Grenzfläche Aluminium/Polyäthylen, nämlich wenn letzteres schwach oxydiert, eine Rolle. Zum anderen ist die Struktur des gesamten Oberflächenbereichs des Polyäthylens bis zu einer gewissen Tiefe gestört, wenn letzteres stark oxydiert. Im ersten Fall wirkt die Einführung von Polyäthylengruppen durch die Oxydation bindungsfördernd. Und aus dem Anwachsen dieser Art Bindungsfestigkeit schließen wir, daß die Adsorption für die Erklärung des Adhäsionsmechanismus eine Rolle spielt und damit eine Adsorptionstheorie für die quantitative Fassung der Adhäsion im entsprechenden Rahmen angemessen ist.
    Notes: Summary The character of the surface and bulk properties of polyethylene have been considered with respect to adhesion and bond strength. Rupture of adhesion oxidatively activated polyethylene to aluminum has two faces. One of them is an apparent failure at the interface of aluminum-polyethylene which was moderately oxidized and another is the failure at the surface region of polyethylene which was strongly oxidized. In the former case the introduction of polar groups with oxidation is effective for the promotion of bond strength, and from the increasing behavior of bond strength we conclude that the adsorption theory on adhesion is appropriate for the elucidation of adhesion mechanism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02086843
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  • 4
    Electronic Resource
    Electronic Resource
    Adsorption of polymers at the solution-solid interfaces (1970)
    Springer
    Colloid & polymer science 238 (1970), S. 438-441 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Adsorptionen von Äthylzellulose als sozusagen “steifes” Polymeres an Glasoberfläche aus verschiedenen Lösungsmitteln heraus, die keine Gruppen für Wasserstoff bindungen an die Festoberflächen besitzen, wurden ausgeführt. Es ergab sich in der Tat Lösungsmittelabhängigkeit. Diese ist jedoch klein im Vergleich zu der beim System Polyvinylacetat/Glas. Eine Ursache für die Lösungsmittelabhängigkeit ist nicht direkt die unterschiedliche Solvatation zwischen Lösung und Polymer, sondern der Effekt des Lösungsmittels auf die räumliche Aufweitung des Polymers in Lösungen. Letzteres bedeutet nämlich, die Segmentdichte ist in schlechten Lösungsmitteln größer als in guten. Die maximale Adsorption ist unabhängig vom Molekulargewicht im Bereich vonMv=2×104 bis 6×104. Es ist zu erwarten, daß die Äthylzellulosc flach auf der Glasoberfläche aufliegt, wenn man die Adsorptionsenergie pro Segment betrachtet.
    Notes: Summary Adsorption of ethyl cellulose, so-called rigid polymer, on the glass surface from various solvents having no groups to make the hydrogen bonds with solid surface was carried out. And the solvent dependence was found. The dependence is, however, small as compared with polyvinyl acetate-glass system (1). A main factor to control the solvent dependence is not competitive between solvent and polymer, but the effect of solvent to extension of polymer in solution, that is, segment density per solid surface area in poor solvent is greater than in better solvent. Maximum adsorption is independent of molecular weight of ethyl cellulose used (Mv=2×104∼6×104). It is expected that ethyl cellulose lies flat on the glass surface considering adsorption energy per segment (ɛ0〉5kT).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02085569
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  • 5
    Electronic Resource
    Electronic Resource
    Growth and pathogenicity of influenza viruses in organ cultures of ciliated epithelium (1974)
    Springer
    Archives of virology 44 (1974), S. 227-236 
    Details
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A study was made of human influenza A viruses and of recombinants in ring organ cultures of human and ferret tracheas. All these viruses had previously been given to man and their virulence defined by clinical observation. There was an apparent association between the ability to reduce ciliary activity and the ability to produce human disease. This association was more evident in the human organ cultures than in the ferret organ cultures. Attempts to relate virus growth in organ cultures to human virulence gave ambiguous results. Of 4 sets of recombinants examined, ciliary damage agreed well with virulence in 1 set, less well in 2 others and not at all in a 4th. Measurement of ciliary movement on the 10th day and titration of virus in the culture medium on the 5th day seemed to suffice for the differentiation of viruses in this system. The technique was not a general test of virulence, and 3 influenza B viruses of differing virulence for man all stopped the beating of cilia in human tracheal organ cultures in 3–5 days. It is suggested that the technique be studied further by genetic methods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01240610
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  • 6
    Electronic Resource
    Electronic Resource
    Arterial midline shift in the posterior fossa (1970)
    Springer
    Neuroradiology 1 (1970), S. 188-194 
    Details
    ISSN: 1432-1920
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé L'auteur insiste sur la distribution entre les branches médianes et les autres artères opacifiées par angiographie vertébrale. Cette distinction permet dans une certaine mesure de reconnaître la nature d'une masse expansive de la fosse postérieure.
    Abstract: Zusammenfassung Bei der Vertebralis-Arteriographie ist es ein besonderes Problem, die Mittellinie des Kleinhirns zu bestimmen und festzustellen, ob ein raumfordernder Prozeß von einer Kleinhirnhemisphäre oder von der Mittellinie ausgeht. Die Unterscheidung zwischen den medialen Ästen von Kleinhirngefäßen und anderen Arterien ist besonders wichtig, da dadurch die Art eines raumfordernden Prozesses im Bereich der hinteren Schädelgrube festgestellt werden kann.
    Notes: Summary The distinction between medial branches of the cerebellum and other arteries opacified in vertebral arteriography should be of clinical importance, because this distinction can be regarded to indicate in some measure the nature of a mass in the posterior fossa.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00404410
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  • 7
    Electronic Resource
    Electronic Resource
    Adsorption of polymers at the solution-solid interface (1970)
    Springer
    Colloid & polymer science 237 (1970), S. 297-302 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Die Adsorption von Äthylen-Vinylacetat-Copolymeren, die aus zwei unterschiedlichen Segmenten hinsichtlich der Adsorptionsenergie bestehen, aus der Lösung an Glaskugeln wurde untersucht. Die Adsorption hängt vom Molekulargewicht ab; und die Konstante α, erhalten durch Anwendung derUllmanschen Gleichung, nimmt mit der Zunahme des Molekulargewichts ab. Die Molekulargewichts-Abhängigkeit der Adsorption läßt vermuten, daß die Polymerketten, in der Grenzfläche adsorbiert, aus Sequenzen und Schleifen bestehen. Die Beziehungen zwischen maximaler Adsorption und mit adsorbierter Polymerketten besetzter Fläche aus verschiedener Lösung wird diskutiert und die Lösungsmittel-Abhängigkeit der maximalen Adsorption wurde aus dem Unterschied der Polymer-Löslichkeit erklärt.
    Notes: Summary The adsorption of ethylene-vinyl acetate copolymer which consists of two different adsorption energy segments from solution onto glass sphere was studied. The adsorption depends on molecular weight and the constant α obtained by application ofUllman's equation is decreased with the increase of molecular weight. The molecular weight dependence of adsorption suggests that the polymer chain adsorbed at solution-solid interface consist of sequences and loop chains. The relation between maximum adsorption and area occupied with adsorbed polymer chain from various solution was discussed, and the solvent dependence of maximum adsorption was explained in the difference of polymer solubility.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02086840
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  • 8
    Electronic Resource
    Electronic Resource
    Adsorption of polymers at the solution-solid interfaces (1970)
    Springer
    Colloid & polymer science 238 (1970), S. 442-446 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Molekülgewichtabhängige selektive Adsorption von Polyvinylacetat an Glas aus Benzollösungen wurde untersucht. Äquivalente Konzentrationen von hohem und niederem Molekulargewicht und zahlenäquivalente Systeme (gleiche Molekülzahl) für beide Molekülgewichte wurden mit vier theoretischen typischen Fällen verglichen: 1. nur das hohe Molekulargewicht wird adsorbiert 2. nur das niedere Molekulargewicht wird adsorbiert 3. die gleiche Zahl von Molekülen wird adsorbiert 4. gleiche Gewichtsmengen an Polymeren werden adsorbiert. Im Bedeckungsbereich zwischen 0–0,6 zeigte sich keine fraktionierte Adsorption, aber oberhalb 0,6 konnte eine bevorzugte Adsorption des Polymers mit niedrigem Molekulargewicht festgestellt werden.
    Notes: Summary Selective adsorption on molecular weight has been investigated in adsorption of two different molecular weights of polyvinyl acetate from benzene solution onto glass surface. Experimental results from equivalent weight system of high molecular weight,M 1, and low molecular weight,M 2, (M 1=4.79×105,M 2=1.56×104) and equivalent number of molecules system (M 1=4.68×105,M 2=1.56×104) were compared with the four typical theoretical results; (i) only high molecular weight polymers are adsorbed, (ii) only low molecular weight polymers are adsorbed, (iii) equivalent number of molecules are adsorbed, (iv) equivalent weight of two different molecular weight polymers are adsorbed. No fractional adsorption was found in the range 0∼0.6 of coverage θ, but over the range 0.6 of coverage, preferential adsorption of low molecular weight polymer was observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02085570
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  • 9
    Electronic Resource
    Electronic Resource
    Derivation of an optical potential for deuterons (1971)
    Springer
    The European physical journal 248 (1971), S. 311-325 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An optical potential for deuterons is derived starting from the nucleon optical potential, taking the deuteron break-up process into account in an approximate way. Numerical calculations have been done for58Ni (11.8 MeV) and90Zr (11.8 and 21.4 MeV). The results show that such a process is not at all negligible.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01400545
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  • 10
    Electronic Resource
    Electronic Resource
    Characterization of high-density polyethylene prepared at low pressure (1972)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 16 (1972), S. 2353-2359 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    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: A high-density polyethylene prepared at low pressures is characterized with respect to density, microscopic examination, mechanical properties, and diffusion. The data for the slowly cooled, nonisothermally crystallized polymer clearly indicate that the method of preparation grossly affects the final properties of the polymer.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1972.070160914
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