ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
Sie haben 0 gespeicherte Treffer.
Markieren Sie die Treffer und klicken Sie auf "Zur Merkliste hinzufügen", um sie in dieser Liste zu speichern.
feed icon rss

Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
  • 1
    Digitale Medien
    Digitale Medien
    A kernel system for iconic image processing (1989)
    Springer
    Computing 42 (1989), S. 91-108 
    Details
    ISSN: 1436-5057
    Schlagwort(e): 68B99 (Software) ; Image processing ; standardization ; system design ; Ada
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Informatik
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung Im folgenden stellen wir einen Gestaltungsentwurf für ein ikonisches Bildverarbeitungssystem vor und beschreiben eine virtuelle Maschine, die die hierfür notwendigen Operationen realisiert. Es werden sowohl Datentypen als auch die charakteristischen Operationen der Bildverarbeitung diskutiert, und es werden Datenobjekte sowie Bildverarbeitungsoperationen formal definiert. Abschließend wird eine mögliche Implementation skizziert, die auf den generischen Konstrukten der Programmiersprache Ada basiert.
    Notizen: Abstract We present a proposal for the design of a kernel system for iconic image processing operations and construct a virtual machine for image processing. The data structures and typical operations in the field of digital image processing are discussed. Furthermore, we give a formal definition of the operations and data objects required and describe one way to implement them by using the generic features of Ada.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02239741
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 2
    Digitale Medien
    Digitale Medien
    The influence of graphitization on the mechanical properties of carbon fibers (1980)
    Springer
    Colloid & polymer science 258 (1980), S. 917-922 
    Details
    ISSN: 1435-1536
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Maschinenbau
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung Struktur und Vorzugsorientierung einer Reihe von Kohlefasern mit verschiedenen Graphitierungsgraden wurden röntgenographisch untersucht. Die Beziehung zwischen Vorzugsorientierung und Elastizitätsmodul ist verschieden von der für nichtgraphitische Kohlefasern beobachteten. Der Unterschied wird durch eine Zunahme der Schernachgiebigkeit der Strukturbausteine mit zunehmender Graphitierung erklärt, die bei konstanter Vorzugsorientierung eine Verminderung des Elastizitätsmoduls der Fasern mit steigender Graphitierung zur Folge hat.
    Notizen: Summary Structure and preferred orientation of a series of carbon fibers with various degrees of graphitization have been studied by X-ray diffraction. The relationship between preferred orientation and Young's modulus differs from that reported for non-graphitic carbon fibers. The difference is explained by an increase of the shear compliance of the structural unit with increasing graphitization which results, for constant preferred orientation, in a decrease of the Young's modulus of the fiber with increasing graphitization.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01584920
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 3
    Digitale Medien
    Digitale Medien
    Structure and properties of fluorinated carbon fibers (1983)
    Springer
    Colloid & polymer science 261 (1983), S. 744-749 
    Details
    ISSN: 1435-1536
    Schlagwort(e): Fluorination ; carbon fibers ; CF fibers ; mechanical properties ; preferred orientation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Maschinenbau
    Notizen: Abstract The fluorination of carbon fibers results in a partial or total conversion of the carbon layers into CF layers. In constrast to the formation of intercalation compounds of carbon fibers, the fluorination causes considerable changes in the fiber texture which results in a marked decrease of tensile modulus and mechanical strength. The relationship between the structural changes and the resulting mechanical properties is studied by small-angle and wide-angle X-ray scattering.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01410948
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 4
    Digitale Medien
    Digitale Medien
    Structure and properties of ultra-high modulus polyethylene (1982)
    Springer
    Colloid & polymer science 260 (1982), S. 174-181 
    Details
    ISSN: 1435-1536
    Schlagwort(e): Polyethylene ; ultra-high modulus ; deformation process ; entanglements ; preferred orientation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Maschinenbau
    Notizen: Abstract The relationship between formation, structure and tensile modulus of ultrahigh modulus polyethylene is explained on the basis of a structural model in which entanglements formed during the deformation process play an important rôle. The results of wide- and small-angle X-ray scattering are interpreted in terms of structural parameters derived from this model.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01465437
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 5
    Digitale Medien
    Digitale Medien
    Role of the pituitary in cyproheptadine-induced pancreatic beta-cell toxicity (1977)
    Springer
    Cellular and molecular life sciences 33 (1977), S. 1495-1497 
    Details
    ISSN: 1420-9071
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary Hypophysectomized rats given cyproheptadine (40 mg/kg) for 10 days exhibited a loss of pancreatic immunoreactive insulin and ultrastructural changes in the cytoplasm of beta-cells. Sham-operated animals given cyproheptadine showed identical changes in pancreatic beta-cells except that cytoplasmic involvement progressed to the formation of large vacuoles. The pituitary is not directly involved with the cyproheptadine-induced depletion of pancreatic insulin but plays a role in the formation of large cytoplasmic vacuoles.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01918830
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 6
    Digitale Medien
    Digitale Medien
    Preparation of the mixed sulfide Nb2Mo3S10 catalyst from the mixed oxide precursor (2000)
    Springer
    Catalysis letters 64 (2000), S. 59-63 
    Details
    ISSN: 1572-879X
    Schlagwort(e): niobium ; molybdenum ; sulfide ; preparation ; hydrotreating catalysts ; thiophene hydrodesulfurization
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract Mixed sulfide Nb2Mo3S10 was obtained by reaction of H2S with the mixed oxide Nb2Mo3O14 at 873 K. High‐resolution electron microscopy and X‐ray diffraction show the formation of homogeneous lamellar mixed sulfide. Due to the increased lability of oxygen, the sulfidation of the mixed oxide is easier compared to that of Nb2O15 oxide. As follows from the characterization of transient solid products, the transformation from the oxide to the sulfide includes the intermediate formation of a partially reduced “bronze” compound. For the thiophene hydrodesulfurization model reaction, the catalytic properties of Nb2Mo3S10 mixed sulfide are intermediate between those of the individual MS2 sulfides (M = Mo, Nb), but closer to those of the Nb compound.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1019058113931
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 7
    Digitale Medien
    Digitale Medien
    Die Bestimmung von Überführungszahlen nach der Methode der Grenzflächen-Wanderung unter Verwendung von Leitisotopen. Ein neues Verfahren (1962)
    Springer
    Naturwissenschaften 49 (1962), S. 606-606 
    Details
    ISSN: 1432-1904
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie , Allgemeine Naturwissenschaft
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01178051
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 8
    Digitale Medien
    Digitale Medien
    Preparation of enantiomerically pure (R)-(1-hydroxyethyl)dimethyl(phenyl)silane using resting cells of Saccharomyces cerevisiae (DHW S-3) as biocatalyst (1995)
    Springer
    Applied microbiology and biotechnology 42 (1995), S. 671-674 
    Details
    ISSN: 1432-0614
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: Abstract The prochiral sila-ketone acetyldimethyl-(phenyl)silane (1) was reduced enantioselectively into (R)-(1-hydroxyethyl)dimethyl(phenyl)silane [(R)-2] using resting cells of the commercially available yeast Saccharomyces cerevisiae (DHW S-3) as the biocatalyst. The bioconversion was performed on a 2.0-g scale in a 5-1 bioreactor. Starting with a substrate (1) concentration of 0.4 g·1−1, the highest production rate measured for this bioconversion was about 45–55 μmol (R)-2·1−1·min−1. After an incubation time of 1 h, all substrate in the medium had been converted, either biocatalytically reduced to (R)-2 or (probably chemically) converted into dimethyl(phenyl)silanol (Me2PhSiOH). After extraction of the cell-free medium with ethyl acetate/dichloromethane and subsequent purification of the extract by Kugelrohr distillation and chromatography on silica gel (medium-pressure liquid chromatography), 800 mg (yield 40%) of the bioconversion product (R)-2 was isolated. As shown by HPLC studies (cellulose triacetate as the chiral stationary phase) and 1H-nuclear magnetic resonance experiments (after derivatization of the bioconversion product with a chiral auxiliary agent), compound (R)-2 was almost enantiomerically pure (〉 99% enantiomeric excess).
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00171942
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 9
    Digitale Medien
    Digitale Medien
    A covalent two-step immobilization technique using itaconic anhydride (1998)
    Springer
    Applied microbiology and biotechnology 49 (1998), S. 129-135 
    Details
    ISSN: 1432-0614
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: Abstract β-Glucosidase from almonds (EC 3.2.1.21) was covalently immobilized by a two-step technique. In the first step, double bonds were introduced into the β-glucosidase by derivatization with itaconic anhydride. In separate studies with α-N-protected l-amino acids, it was established that itaconic anhydride acylated mainly primary amino groups of lysines and, to a much lesser extent hydroxyl groups of tyrosines and sulfhydryl groups of cysteines. The acylated β-glucosidase showed no loss of activity and the K m decreased from 3.6 mM to 2.6 mM when p-nitrophenyl β-d-glucopyranoside was used as the substrate. In the second step, the derivatized β-glucosidase was co-polymerized radically with N,N′-methylenebisacrylamide in buffer solution. The resulting acrylamide immobilizate possessed a much better storage stability at 30–56 °C when compared to β-glucosidase immobilized on Eupergit C. However, the specific activity was higher with the Eupergit immobilizate. Free and acrylamide-immobilized β-glucosidase were used for glucosylation of chloramphenicol by transglucosylation in 20% (v/v) acetonitrile at 37 °C. The acrylamide immobilizate demonstrated a great enhancement of stability and approximately 50% more chloramphenicol β-glucoside was obtained after 5 h.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s002530051148
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 10
    Digitale Medien
    Digitale Medien
    Preparation of enantiomerically pure (R)-(1-hydroxyethyl)dimethyl(phenyl)silane using resting cells of Saccharomyces cerevisiae (DHW S-3) as biocatalyst (1995)
    Springer
    Applied microbiology and biotechnology 42 (1995), S. 671-674 
    Details
    ISSN: 1432-0614
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: Abstract  The prochiral sila-ketone acetyldimethyl- (phenyl)silane (1) was reduced enantioselectively into (R)-(1-hydroxyethyl)dimethyl(phenyl)silane [(R)-2] using resting cells of the commercially available yeast Saccharomyces cerevisiae (DHW S-3) as the biocatalyst. The bioconversion was performed on a 2.0-g scale in a 5-1 bioreactor. Starting with a substrate (1) concentration of 0.4 g ⋅ l-1, the highest production rate measured for this bioconversion was about 45–55 μmol (R)-2⋅l-1⋅min-1. After an incubation time of 1 h, all substrate in the medium had been converted, either biocatalytically reduced to (R)-2 or (probably chemically) converted into dimethyl(phenyl)silanol (Me2PhSiOH). After extraction of the cell-free medium with ethyl acetate/dichloromethane and subsequent purification of the extract by Kugelrohr distillation and chromatography on silica gel (medium-pressure liquid chromato- graphy), 800 mg (yield 40%) of the bioconversion product (R)-2 was isolated. As shown by HPLC studies (cellulose triacetate as the chiral stationary phase) and 1H-nuclear magnetic resonance experiments (after derivatization of the bioconversion product with a chiral auxiliary agent), compound (R)-2 was almost enantiomerically pure (〉99% enantiomeric excess).
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s002530050311
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...