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  • GEOPHYSICS  (18)
  • Chemical Engineering  (3)
  • Acid  (1)
  • 2005-2009
  • 1990-1994
  • 1970-1974  (22)
  • 1974  (22)
  • 1
    Electronic Resource
    Electronic Resource
    Existence of acid and alkaline phosphohydrolase activity in the phytoflagellate Ochromonas danica (1974)
    Springer
    Archives of microbiology 97 (1974), S. 63-67 
    Details
    ISSN: 1432-072X
    Keywords: Phosphohydrolase ; Acid ; Alkaline ; Ochromonas ; Phytoflagellate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Cell homogenates of light-grown Ochromonas danica contained distinct non-specific non-phosphate-repressible acid and alkaline phosphohydrolase activities. Acid phosphohydrolase activity had a broad pH range of 2.0–5.0 and the optimum for alkaline phosphohydrolase activity was pH 8.6 Acid phosphohydrolase (pH 3.6) activity had an optimum temperature of 55°C; the alkaline enzyme activity had an optimum temperature of 37–40°C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00403045
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Gravitational instability in the thermal entry region with liquid film flow (1974)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 20 (1974), S. 194-197 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690200134
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Mechanical equilibrium for eccentric rotating disks (1974)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 20 (1974), S. 600-602 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690200325
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Hydrostatic extrusion of solid polyethylene (1974)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 14 (1974), S. 641-645 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    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: Solid state processing of polyethylene (SS60-050) by hydrostatic extrusion is investigated. Measurements are also reported for the tensile properties of polyethylene 60-050 under superposed hydrostatic pressure. With the latter data an estimate is made of the pressure required for extrusion of polyethylene in the absence of losses due to friction and redundant work. The limiting conditions for successful extrusion are discussed.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760140909
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    Paper (German National Licenses)
    Fulltext
  • 5
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    Study of a small magnetospheric substorm (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Data from a rocket launched into the expansion phase of an auroral substorm have been compared with data from numerous ground stations and several space vehicles. It is shown that this magnetic and auroral substorm has most of the features of larger substorms; thus it is implied that the same plasma processes are involved in all substorms. Some evidence is presented to link the auroral breakup with the field lines conjugate to the inner edge of the plasma sheet. The implications of these two results for substorm morphology and the triggering mechanism of the substorm instability are discussed. It is concluded that spatial gradients in plasma temperature are a likely cause.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research; 79; Apr. 1
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Tracking air-dropped drogues and dyes from aircraft in support of ERTS-1 circulation studies (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The author has identified the following significant results. For two years ERTS-1 has been employed to investigate current circulation patterns in Delaware Bay under different tidal, flow, and wind conditions. Since sufficient numbers of current meters and boats are not available, air-droppable drogues and dye packs have been developed and tested. The drogues consist of a styrofoam float and a line to which is attached a stainless steel biplane. The length of the line determines at what depth currents will be monitored. The floats are color coded to distinguish their movement and mark the depth of the biplanes. Simultaneously floating and anchored dye packs of fluorescein dye have been deployed from aircraft. The movement of the dye and drogues is tracked by sequential aerial photography, using fixed markers on shore or on buoys as reference points to calibrate the scale and direction of drogue movement. The current data obtained by this technique is then used to annotate current circulation maps derived from ERTS-1 imagery.
    Keywords: GEOPHYSICS
    Type: E74-10747 , NASA-CR-139987
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Edge and line detection in ERTS imagery: A comparative study (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Several local edge detection operators were applied to a set of ERTS pictures of the Monterey, Calif. area. Gradient operators performed consistently better than laplacian operators in detecting edges. It was also found that if a grayscale normalization operation, histogram flattening, was applied to the pictures first, the edge detector outputs were greatly enhanced. The use of interpolation for more accurate location of edges on a digital picture was also briefly investigated. Curve detection operators were applied to the edge detector outputs; this had the effect of enhancing the edges while suppressing noise.
    Keywords: GEOPHYSICS
    Type: NASA-CR-138963 , TR-312
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    A global magnetic anomaly map (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A subset of POGO satellite magnetometer data has been formed that is suitable for analysis of crustal magnetic anomalies. Using a thirteenth order field model, fit to these data, magnetic residuals have been calculated over the world to latitude limits of plus 50 deg. These residuals averaged over one degree latitude-longitude blocks represent a detailed global magnetic anomaly map derived solely from satellite data. Preliminary analysis of the map indicates that the anomalies are real and of geological origin.
    Keywords: GEOPHYSICS
    Type: NASA-TM-X-70628 , X-922-74-98 , NSSDC-ID-65-081A-05-PS , NSSDC-ID-67-073A-06-PS , NSSDC-ID-69-051A-21-PS
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    A study of the early detection of insect infestations and density/distribution of host plants (1974)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: There are no author-identified significant results in this report.
    Keywords: GEOPHYSICS
    Type: E74-10600 , NASA-CR-138709 , PR-12
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 10
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    A study of early detection of insect infestations and density/distribution of host plants (1974)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: There are no author-identified significant results in this report.
    Keywords: GEOPHYSICS
    Type: E74-10638 , NASA-CR-138812 , PR-13
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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