Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Articles: DFG German National Licenses  (19)
  • 1980-1984  (17)
  • 1880-1889  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Uptake of SO2 in shoots of Scots pine: field measurements of net flux of sulphur in relation to stomatal conductance (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 5 (1982), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract. Net fluxes of gaseous sulphur compounds, water vapour and carbon dioxide to current- and one-year-old shoots of Scots pine were simultaneously measured in the field. The shoots were fumigated in temperature-controlled assimilation chambers with sulphur dioxide at concentrations ranging from 40 to 250 μg m−3 (15–95 ppb). The hypothesis that stomatal opening regulates the uptake of sulphur dioxide was tested. The following conclusions were reached concerning the dry deposition of sulphur dioxide to a dry coniferous shoot.There was a marked diurnal variation in the uptake rate of sulphur dioxide. The net deposition velocity of sulphur was about three times higher during the day than during the night during July-October. Stomatal opening was not the primary factor controlling the dry deposition rate of sulphur dioxide. The net dry deposition rate was significantly smaller than the calculated rate based on stomatal conductances for water vapour.Part of this deviation could be explained by re-emission of reduced sulphur compound(s) from the needles. The re-emission of sulphur was a light-dependent process and might be of great significance for the sulphur balance calculations.A variable deposition velocity should be used in atmospheric transport models to account for the diurnal and seasonal variation in the surface resistance of a dry canopy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/1365-3040.ep11587612
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Immunogenic Properties of α(1 → 6) Dextran, Its Protein Conjugates, and Conjugates of Its Breakdown Products in Mice (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 19 (1984), S. 0 
    Details
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Mice were immunized with α(1–6) dextran, either as such or coupled to protein carriers, and their anti-dextran response was measured by a solid-phase radioimmunoassay and the Farr assay. Like earlier investigators we found that protein-conjugated dextran was more antigenic than plain dextran. Our novel findings were that (1) a standard dose (30 μg of dextran per injection) coupled to strongly antigenic protein (chicken serum albumin (CSA)) was three times more antigenic than dextran coupled to weakly antigenic bovine serum albumin (BSA); (2) dextrans of low molecular weight (1000–10,000 daltons) coupled to CSA induced at least ten times stronger secondary responses than did a similarly coupled macromoleculur dextran (5–40 million daltons); (3) variation of the CHO/protein ratio from 0.3 to 1 had little effect on the antigenicity of the dextran. Increase of the ratio from one appeared 10 decrease immunogenicity when BSA was the carrier but not when CSA was ihe carrier.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3083.1984.tb00965.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Measurement of theK-shell fluorescence yield of13Al,20Ca,23V and25Mn for vacancies produced by the relativistic electron impact (1981)
    Springer
    The European physical journal 300 (1981), S. 103-104 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The K-shell fluorescence yield of Al, Ca, V and Mn has been measured by bombarding thin solid targets of 0.5–4.0μg/cm2 on 6–10μg/cm2 carbon backing with relativistic electrons of 30 and 60 MeV and by simultaneous detection of the x-ray and Auger yield by means of a Si(Li) detector and an electrostatic electron spectrometer, respectively. While the values obtained for25Mn (ωK=0.310 −0.020 +0.023 ) and23V(ωK=0.252 −0.018 +0.020 ) agree within their accuracy with known experimental and theoretical data, are the values of20Ca (ωK=0.127 −0.011 +0.013 ) and13Al(ωK=0.027±0.005) lower than experimental or recommended empirical values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01412621
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Comment on fusion cross sections in the40Ar+40Ca and40Ca+40Ca systems (1981)
    Springer
    The European physical journal 302 (1981), S. 365-366 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Cross sections for the production of evaporation residues in a fusion reaction have been extracted from measurements of cross sections for elastic, quasi-elastic and deep inelastic scattering of40Ar projectiles on40Ca target nuclei at incident energies ELAB=191, 236 and 272 MeV. The extracted data are compared with the predictions of a one-body window-friction model including a neck configuration in the interaction phase between the projectile and target nuclei. Furthermore, the results for the40Ar+40Ca system are compared to those obtained in the similarly mass-symmetric system40Ca+40Ca where directly measured evaporation residue data are available. The fusion reaction in heavy ion collisions has so far been studied mostly at low incident energies and for systems where the fusion cross section is in good approximation given by the cross section for evaporation residues [1]. This approximation has been verified only for heavy interacting systems (A〉 100 for the combined system). In this paper we comment on the problems of fusion cross sections for the lighter projectile-target combination40Ar+40a and give evidence that this approximation may not be generally valid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01414272
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Quenching of the electron scattering form factor of the 1+ state at 3.48 MeV in88Sr and the influence of theΔ(1232)-isobar (1982)
    Springer
    The European physical journal 305 (1982), S. 231-234 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The form factor for excitation of the 1+ state at 3.48 MeV in88Sr by inelastic electron scattering has been measured for momentum transfersq=0.24–0.62 fm−1. Neither its magnitude nor shape can be described employing the best available nuclear wave functions. We demonstrate with a schematic model that the observed reduction of the form factor may be understood by taking into account a renormalization of theM1-operator due to virtualΔ-hole excitations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01417439
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    On the fusion dynamics of40Ar+40Ca — Fusion-fission and fusion-evaporation (1983)
    Springer
    The European physical journal 313 (1983), S. 57-67 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Evaporation residue measurements have been made for the40Ar+40Ca system at high incident energies,E Lab=161, 190, 236 and 273 MeV. A dynamical description of the fusion process is presented, where in a trajectory model both rotational and neck degrees-of-freedom are included. Using this model maximuml-values for fusion are determined and at high incident energies are found to be significantly lower than those found when using the more usual one-dimensional effective nucleus-nucleus potential. The fusion cross sections minus the fission component yields evaporation residue cross sections that are in good agreement with the data. Also, mass distributions of the evaporation residues compare well with statistical-decay model predictions. A comparison is made with the similarly mass-symmetric40Ca+40Ca system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02115843
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Zur Frage der optischen Leitungsbahnen des menschlichen Gehirns (1885)
    Springer
    European archives of psychiatry and clinical neuroscience 16 (1885), S. 639-653 
    Details
    ISSN: 1433-8491
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02057566
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Pathologisch-Anatomisches und Klinisches über die optischen Leitungsbahnen des menschlichen Gehirns (1889)
    Springer
    European archives of psychiatry and clinical neuroscience 20 (1889), S. 504-513 
    Details
    ISSN: 1433-8491
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02086698
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Antibakterielle Aktivität von Clindamycin und Linkomycin in Bouillon, Serum und in Kombination mit Polymorphkernigen Granulozyten gegen Staphylococcus aureus und Staphylococcus epidermidis (1984)
    Springer
    Infection 12 (1984), S. 280-285 
    Details
    ISSN: 1439-0973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary We investigated the antibacterial activity of clindamycin and lincomycin at 1/4×minimum inhibitory concentration (MIC), 1 × MIC and 4 × MIC against a serum-resistantStaphylococcus aureus and a serum-resistantStaphylococcus epidermidis strain in broth, in serum with and without the presence of leukocytes and in Hank's medium in combination with leukocytes alone. Against both test strains, lincomycin in broth and serum was similiarly effective, whereas againstS. aureus clindamycin in broth was somewhat more active. In the combined test mixture of serum with leukocytes, even a 1/4 × MIC of clindamycin or lincomycin markedly improved leukocyte killing ofS. aureus, whereas both compounds could not further enhance the marked leukocyte killing ofS. epidermidis, even at inhibitory concentrations. In Hank's medium with leukocytes alone, clindamycin and lincomycin had at the most only a bacteriostatic effect against both test strains.
    Notes: Zusammenfassung Wir untersuchten die antibakterielle Aktivität von Clindamycin und Linkomycin bei 1/4 × minimaler Hemmkonzentration (=MHK), 1 × MHK und 4 × MHK gegen einen serumresistentenStaphylococcus aureus- und einen serumresistentenStaphylococcus epidermidis-Stamm in Bouillon, in Serum mit und ohne Gegenwart von Leukozyten bzw. in Hank's Medium mit Leukozyten allein. Linkomycin war gegen beide Teststämme in Bouillon und Serum gleichermaßen wirksam, während Clindamycin in Bouillon gegenS. aureus doch etwas aktiver war. Im kombinierten Ansatz von Serum mit Leukozyten verbesserte bereits 1/4 × MHK von Clindamycin bzw. Linkomycin deutlich die leukozytäre Abtötung vonS. aureus, während beiS. epidermidis beide Substanzen die hohe leukozytäre Abtötungsrate auch bei inhibitorischen Konzentrationen nicht weiter verbessern konnten. In Hank's Medium mit Leukozyten allein hatten Clindamycin wie Linkomycin gegen beide Teststämme maximal nur einen bakteriostatischen Effekt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01645962
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Search for the density effect in inner-shell lonization by ultra relativistic electron impact (1982)
    Springer
    The European physical journal 305 (1982), S. 9-19 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We have extended the measurements ofK-andL-shell ionization cross sections by electron impact into the ultra relativistic energy region, 0.9≦E≦2.0 GeV, in order to search for a saturation of the cross section. This phenomenon, which is due to the polarization of the target medium, is called density effect. It is predicted to occur at several hundred MeV impact energy and preferentially for lowZ target elements. Theoretical calculations are presented, based on the one-photon-exchange approximation. The absolute measurements of theK-andL-shell cross sections for Ni(K), Cu(K), Ag(K, L) and Au(L) performed at the 2.5 GeV electron synchrotron of the Bonn University, however, exhibit that the cross sections show no saturation but are still increasing. Furthermore, from theK X-ray yields, obtained at 0.9 and 2.0 GeV by bombarding the lowZ elements S, Ca, Mn, Ni and Ge, we obtain for the corresponding cross section ratio σ K (2GeV)/σ K (0.9GeV)=1.08±0.01 on the average. TheK X-ray yield of a composite Ca — Mn target amounts to $$[\sigma _K (Ca;2.0GeV)/\sigma _K (Mn;2.0GeV)]/[\sigma _K (Ca;0.9GeV/\sigma _K (Mn;0.9GeV)] = 0.99 \pm 0.02.$$ . All three results are in disagreement with theory. This severe discrepancy is discussed but the origin for it is not yet understood.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01415072
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...