Bibliothek

X
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
Filter
  • 1985-1989  (5)
  • 1975-1979
  • 1940-1944  (1)
  • 1986  (5)
  • 1941  (1)
Datenquelle
Materialart
Erscheinungszeitraum
  • 1985-1989  (5)
  • 1975-1979
  • 1940-1944  (1)
Jahr
Schlagwörter
  • 1
    Digitale Medien
    Digitale Medien
    Methyl 2,3-dideoxy-3-nitro-D-erythro-pentofuranoside, isomers and derivatives (1986)
    s.l. : American Chemical Society
    The @journal of organic chemistry 51 (1986), S. 2702-2706 
    Details
    ISSN: 1520-6904
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/jo00364a015
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 2
    Digitale Medien
    Digitale Medien
    Beitrag zur Berechnung von Kreiselrädern mit nichtstoÜfreiem Eintritt (1941)
    Springer
    Archive of applied mechanics 12 (1941), S. 63-69 
    Details
    ISSN: 1432-0681
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Zusammenfassung Bei der Strömung in Kreiselrädern tritt bei Nichteinhaltung bestimmter Betriebsbedingungen (DurchfluÜmenge und Drehzahl) eine Umströmung der Schaufeleintrittskanten auf. Die Gesamtzirkulation ändert sich dabei so, daÜ an den Schaufelaustrittskanten glatter AbfluÜ erhalten bleibt. Die entstehende zusätzliche Zirkulationsverteilung wird für Kreiselräder mit logarithmisch-spiraligen Schaufeln berechnet, wobei sich u. a. eine starke Abhängigkeit der Form dieser Verteilungen vom Überdeckungsverhältnis ergibt. Mit der Zirkulationsverteilung ändert sich auch die Druckverteilung, wodurch unter Umständen erhebliche Verluste infolge Grenzschichtablösung eintreten können.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02086426
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 3
    Digitale Medien
    Digitale Medien
    Recombinant interferon alpha 2 stimulation of target-binding by natural killer cells (1986)
    Springer
    Journal of molecular medicine 64 (1986), S. 1036-1040 
    Details
    ISSN: 1432-1440
    Schlagwort(e): Sinlge cell assay, modified ; Natural killer cells ; Interferon
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Even though the enhancement of the lyitc capacity and the kinetics of lysis of natural killer cells (NK) by interferon has been well documented, an increase of the target-effector cell binding percentage is still disputed. We, therefore, modified the Grimm-Bonavida single-cell assay so that 400 to 600 cells per individual determination could be reliably evaluated. Using this assay, which makes possible separate determination of effector-target cell binding and target lysis, we demonstrated that, in addition to lytic capacity, target-effector cell binding is also increased by preincubating NK with 100 to 1,000 IU interferon alpha 2 per 106 cells. Our data indicate that interferon alpha 2 induces pre-NK cells to bind target cells and that it activates these pre-NK cells to kill the targets.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01757211
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 4
    Digitale Medien
    Digitale Medien
    Photoluminescence detection of impurities introduced in silicon by dry etching processes (1986)
    Springer
    Applied physics 41 (1986), S. 175-178 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 78.55DS ; 61.80Jh ; 71.35 +z
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract We report on a photoluminescence study of silicon samples subjected to different dry etching processes. Several luminescence lines, known from defects produced by high-energy irradiation, manifest damage of the crystalline material. Noble gas ion beam etching (using Ne+, Ar+, Kr+, and Xe+) with ion energies as low as 400 eV produces characteristic luminescence lines which correspond to defects within a 200–300 Å thick surface layer. Incorporation of carbon during CF4 reactive ion etching produces the familiar G-line defect. The G-line photoluminescence intensity in our samples is directly correlated with the substitutional carbon concentration, as determined by infrared absorption measurements before the etch process; we therefore suggest that a simple method to determine the substitutional carbon concentration in a crystalline silicon sample is a standard dry etching process and a comparison of the resulting G-line photoluminescence intensity to a calibrated sample. The sensitivity of this method seems to be better than 1014 carbon atoms/cm3.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00616836
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 5
    Digitale Medien
    Digitale Medien
    Bradyrhizobium japonicum mutants defective in root-nodule bacteroid development and nitrogen fixation (1986)
    Springer
    Archives of microbiology 144 (1986), S. 355-366 
    Details
    ISSN: 1432-072X
    Schlagwort(e): Bradyrhizobium ; Electron microscopy ; Mutants ; Nitrogen fixation ; Nodulation ; Soybean ; Symbiosis ; Transposon Tn5
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract The genome of the slow-growing Bradyrhizobium japonicum (strain 110) was mutagenized with transposon Tn5. A total of 1623 kanamycin/streptomycin resistant derivatives were screened in soybean infection tests for nodulation (Nod) and symbiotic nitrogen fixation (Fix). In this report we describe 14 strains possessing a stable, reproducible Nod+Fix- phenotype. These strains were also grown under microaerobic culture conditions to test them for free-living nitrogen fixation activity (Nif). In addition to strains having reduced Fix and Nif activities, there were also strains that had reduced symbiotic Fix activity but were Nif+ ex planta. Analysis of the genomic structure revealed that the majority of the strains had a single Tn5 insertion without any further apparent physical alteration. A few strains had additional insertions (by Tn5 or IS50), or a deletion, or had cointegrated part of the vector used for Tn5 mutagenesis. One of the insertions was found in a known nif gene (nifD) whereas all other mutations seem to affect different, hitherto unknown genes or operons. Several mutant strains had an altered nodulation phenotype, inducing numerous, small, widely distributed nodules. Light and electron microscopy revealed that most of these mutants were defective in different stages of bacteroid development and/or bacteroid persistence. The protein patterns of the mutants were inspected by two-dimensional gel electrophoresis after labelling microaerobic cultures with l-(35S)methionine. Of particular interest were mutants lacking a group of proteins the synthesis of which was known to be under oxygen control. Such strains can be regarded as potential regulatory mutants.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00409885
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 6
    Digitale Medien
    Digitale Medien
    Magnetic heat conductance between CMN single crystals and liquid3He (1986)
    Springer
    Journal of low temperature physics 63 (1986), S. 401-421 
    Details
    ISSN: 1573-7357
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Measurements of the magnetic Kapitza resistance between single crystals of CMN and lanthanum-diluted CMN in contact with ultrapure liquid3He are presented. The investigations were performed in the temperature range 2–100 mK and in magnetic fields up to 600 Oe. For the first time, a magnetic thermal coupling between bulk crystals with dimensions of up to 3 mm and liquid3He was observed. In the case of pure CMN and liquid3He below 7 mK, the relationR ∞ T n withn=4±1 is seen. A strong dependence ofR with magnetic field and Ce3+ content is found.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00681489
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...