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  • Chemical Engineering  (4)
  • General Chemistry  (2)
  • DNA Synthesis  (1)
  • SPACECRAFT PROPULSION AND POWER
  • 1975-1979  (5)
  • 1970-1974  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Differential patterns of mitochondrial, chloroplastic and nuclear DNA synthesis in the synchronous cell cycle of Chlamydomonas reinhardtii (1978)
    Springer
    Planta 141 (1978), S. 259-267 
    Details
    ISSN: 1432-2048
    Keywords: Cell cycle (Chlamydomonas) ; Chlamydomonas ; Chloroplast DNA ; DNA Synthesis ; Mitochondrial DNA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Nuclear DNA (ncDNA) synthesis in Chlamydomonas reinhardtii was measured by both 32P[or-thophosphoric acid] (32P) and [14C]adenine incorporation and found to be highly synchronous. Ca. 85% of incorporation was confined to the first 6 h of the dark period of a synchronized regime consisting of an alternating light-dark period of 12 h each. In contrast, no such synchronous incorporation pattern was found for chloroplast (cp) and mitochondrial (mt) DNAs in the same cell population. These two organellar DNAs also exhibited different 32P-incorporation patterns in the cell cycle. Considerable amounts of 32P were incorporated into cpDNA throughout the light-dark synchronous cycle under both mixo- and phototrophic growth conditions, although the second 6-h light period under phototrophy showed an increase not apparent under mixotrophy. This change in growth conditions did not affect 32P incorporation into mtDNA, which was found throughout the cell cycle, with a modest peak in the first 6-h of the dark period. The pattern of [3H]thymidine incorporation into cpDNA was also determined. Under synchronous phototrophic conditions, this pattern was quite different from that obtained with 32P. Most [3H]thymidine incorporation occurred during the light period of the synchronous cycle; this period had been shown previously by density transfer experiments to be the time of cpDNA duplication. Such preferential [3H]thymidine incorporation into cpDNA in the light period was not observed under mixotrophic synchronous growth conditions; in these, [3H]thymidine incorporation was detected throughout the cell cycle. This lack of coincidence between the patterns of 32P- and of [3H]thymidine incorporation into cpDNA during the synchronous cell cycle indicates that in addition to replication, the considerably reiterated organelle-DNA molecules may also regularly undergo an extensive repair process during each cell cycle.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00388341
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  • 2
    Electronic Resource
    Electronic Resource
    Calculation of phase equilibria for ethylene/low-density polyethylene mixtures (1977)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 23 (1977), S. 758-764 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: We have used recent ethylene/low-density polyethylene gas sorption data to calculate phase equilibria for ethylene/polyethylene mixtures from 0 to 30.3 MN/m2 (0 to 300 atm), the pressure range normally used in the flash separation step in low-density polyethylene manufacture. The computations show significant differences from results obtained by extrapolation of the results of a previous study to the relatively low pressure range considered here.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690230519
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  • 3
    Electronic Resource
    Electronic Resource
    Convective heat transfer in gas-solid suspension flow through packed beds (1978)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 24 (1978), S. 613-619 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A correlation for the convective heat transfer between a bed of metallic oxides and a flowing gas-solid suspension was obtained experimentally. Four industrially important commercial catalysts with different physical, thermal, and transport properties were used as the bed materials. A wide range of air flow rates and solids to gas loading ratios were used. The correlating parameters, to estimate the convective Nusselt number, were found to be the Reynolds number, the Archimedes number, the solids loading ratio, and the shape factor of the packing materials. Impressive increases in heat transfer rates were observed with increased solids loading.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690240408
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  • 4
    Electronic Resource
    Electronic Resource
    Reaktionsfähige Verbindungen aus Fluorolefinen (1973)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 85 (1973), S. 1062-1062 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19730852318
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  • 5
    Electronic Resource
    Electronic Resource
    Solubility of supercritical gases in polymers - a review (1977)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 17 (1977), S. 65-72 
    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: Processing of polymers is greatly affected by the presence of dissolved gases. Analysis of the effect of dissolved gases requires two types of information: equilibrium thermodynamic data and predictive correlations as well as diffusion rate data and analyses. We review here the state-of-the-art knowledge of the equilibrium thermodynamics of gases dissolved in polymers. The published data are presented and analyzed. Also, we review the latcst theories and predictive correlations for gas solubility in polymers.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760170202
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  • 6
    Electronic Resource
    Electronic Resource
    Extrudate swell from slit and capillary dies: An experimental and theoretical study (1979)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 19 (1979), S. 609-616 
    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: A comparative experimental study of extrudate swell from long slit and capillary dies is reported for rheologically characterized polystyrene and polypropylene melts. Generally extrudate swell from a slit is greater than that from a capillary die. At low die wall shear rates it goes to a value of about 1.2 as opposed to about 1.1 found for capillary dies. The onset and character of extrudate distortion have been studied. The experimental results are compared with theories of swell based on unconstrained recovery from Poiseuille flow in these geometries. A detailed analysis of such theories of extrudate swell based on the original work of Tanner has been carried out. The analysis is placed in a more general form which should be valid for a range of die cross-sections.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760190904
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  • 7
    Electronic Resource
    Electronic Resource
    Reactive Compounds from Fluoroolefins (1973)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 12 (1973), S. 1023-1023 
    Details
    ISSN: 0570-0833
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/anie.197310231
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