ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

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
  • 1
    Electronic Resource
    Electronic Resource
    Effect of calcium and nitrogen nutrition on bacterial canker disease of tomato (1988)
    Springer
    Plant and soil 112 (1988), S. 113-120 
    Details
    ISSN: 1573-5036
    Keywords: bacterial canker ; Clavibacter michiganense ; Lycopersicon esculentum ; calcium and nitrogen nutrition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Bacterial canker disease development was most rapid in all treatments with zero calcium and low (30 ppm) nitrogen. Calcium at 100 ppm or higher in the nutrient solution reduced disease severity in susceptible Moneymaker and resistant Plovdiv 8/12. The resistance of Plovdiv 8/12 was dependent upon adequate calcium. Higher levels of nitrogen (450 ppm) did not result in a significant increase in disease in comparison with the medium levels (240 ppm) of nitrogen. There was no significant interaction between calcium and nitrogen nutrition and disease severity. The (Ca+Mg)/(Na+K) ratio correlated better than calcium alone with reduced disease severity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02181760
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    facet.materialart.
    Unknown
    Incompressible boundary-layer stability analysis of LFC experimental data for sub-critical Mach numbers (1986)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: An incompressible boundary-layer stability analysis of Laminar Flow Control (LFC) experimental data was completed and the results are presented. This analysis was undertaken for three reasons: to study laminar boundary-layer stability on a modern swept LFC airfoil; to calculate incompressible design limits of linear stability theory as applied to a modern airfoil at high subsonic speeds; and to verify the use of linear stability theory as a design tool. The experimental data were taken from the slotted LFC experiment recently completed in the NASA Langley 8-Foot Transonic Pressure Tunnel. Linear stability theory was applied and the results were compared with transition data to arrive at correlated n-factors. Results of the analysis showed that for the configuration and cases studied, Tollmien-Schlichting (TS) amplification was the dominating disturbance influencing transition. For these cases, incompressible linear stability theory correlated with an n-factor for TS waves of approximately 10 at transition. The n-factor method correlated rather consistently to this value despite a number of non-ideal conditions which indicates the method is useful as a design tool for advanced laminar flow airfoils.
    Keywords: AERODYNAMICS
    Type: NASA-CR-3999 , NAS 1.26:3999
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 3
    facet.materialart.
    Unknown
    A unique measurement technique to study laminar-separation bubble characteristics on an airfoil (1987)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: A 'nonintrusive', multielement heat-transfer sensor was designed to study laminar-separation bubble characteristics on a NASA LRN (1)-1010 low-Reynolds number airfoil. The sensor consists of 30 individual nickel films, vacuum-deposited on a thin substrate (0.05 mm) that was bonded to the airfoil model with the sensor array placed streamwise on the airfoil upper surface. Experiments were conducted on a 15-cm chord model in the 50,000-300,000 chord Reynolds number range. Time history as well as spectral analysis of signals from surface film gauges were simultaneously obtained to determine the location of laminar separation and the subsequent behavior of the separated shear layer. In addition to the successful determination of laminar separation, a new phenomenon involving a large phase shift in dynamic shear stresses across the separation and reattachment points was observed.
    Keywords: AERODYNAMICS
    Type: AIAA PAPER 87-1271
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...