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  • Chemical Engineering  (5)
  • Physics  (3)
  • Cell & Developmental Biology  (1)
  • MECHANICAL ENGINEERING
  • SOLAR PHYSICS
  • 1965-1969  (9)
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Keywords
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Water-oil displacements from porous media utilizing transient adhesion-tension alterations (1965)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 11 (1965), S. 617-624 
    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: Previous laboratory studies have demonstrated that the injection of small quantities of reverse-wetting agents during water displacement can increase oil recovery from unconsolidated porous media. Hexylamine is a suitable reverse-wetting agent. It has been found that the effectiveness of this treatment increases with the quantity of amine injected (slug volume and/or amine concentration in the slug), and that treatments sufficient to stimulate oil production at high water flow rates did not do so at low flow rates. It has been established that the stimulation of oil production by this technique is accomplished by transient adhesion-tension alterations, resulting in the spontaneous accumulation of oil into large continuous masses which are subsequently mobilized.The present investigation has attempted to investigate the effect of other variables thought to be important in this system in order to clarify the mechanism by which increased oil recovery is effected. Specifically, the mechanism by which large oil masses are formed and propagated was studied.Displacement studies conducted in a glass-grid micromodel, under cinemicrographic observation, revealed that large oil masses form as a consequence of restoration of water wettability (amine desorption) but only if the local oil saturation exceeds the irreducible minimum value (under water-wet conditions). Mobilization of these oil masses was observed under the influence of a favorable wettability gradient.Displacement studies were also performed in unconsolidated silica sand beds, under conditions of varying oil-water viscosity ratio, hydraulic permeability, flow rate, and time at which the amine was injected. In the range of the variables investigated, the additional oil recovered (by treatment) increased as the viscosity ratio increased oil recovery. Water-oil displacement efficiencies enhanced by amine treatment were found to correlate satisfactorily with a parameter representing the ratio of the hydraulic forces to the capillary forces within the medium.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690110412
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  • 2
    Electronic Resource
    Electronic Resource
    Direct contact heat transfer between immiscible liquids in turbulent pipe flow (1968)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 14 (1968), S. 151-158 
    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: This paper reports on an experimental study of the direct contact heat transfer between oil and water in turbulent pipe flow under nonboiling conditions. Data were taken by a new technique, namely, monitoring on a very fast response recorder the output of a small thermocouple placed in the two-phase flow. The variables studied were the liquid velocity, the pipe diameter, the water volume fraction, and, to a lesser degree, the interfacial tension and the oil viscosity. A successful semiempirical method of correlating the data is also presented.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690140126
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  • 3
    Electronic Resource
    Electronic Resource
    The evaporation of carbon tetrachloride in a wetted-wall column (1965)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 11 (1965), S. 1139-1142 
    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: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690110633
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  • 4
    Electronic Resource
    Electronic Resource
    Promotion of drop-by-drop condensation of steam from seawater on a vertical copper tube (1968)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 14 (1968), S. 245-250 
    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 limited number of tests were made of promoters, their method of application, corrosion resistance, etc.The best promoter found to date is tetrakis octadecyl thio silane (C18H37S)4Si which differs only in parafinic chain length from (C12H25S)4Si which was found to be one of the best promoters for drop-by-drop condensation by Blackman and Dewar (1, 2), Hampson (2, 3), and Osment (4, 5). These compounds are nontoxic.The C18 compound appears to be superior to the C12 compound in that it is less volatile, lower melting (∼34°C), and appears to impart superior oxidation resistance to copper when adsorbed on clean oxide-free metal.Copper tubes can be rapidly cleaned in place by sulfur dioxide or hydrochloric acid in steam, or, if previously promoted by a thio silane, by treatment first with chlorine gas in steam.The thio silanes may be rapidly applied as a 1% solution in octanoic acid injected into the sea-water feed. The acid acts as cleaner and poor promoter, allowing the good promoter molecules to contact the metal tube.The amounts of the best promoters required are in the parts per billion range.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690140209
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  • 5
    Electronic Resource
    Electronic Resource
    A rheological interpretation of torque-rheometer data (1967)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 7 (1967), S. 45-51 
    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
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760070112
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  • 6
    Electronic Resource
    Electronic Resource
    Subunits of immunoglobulins and their relationship to antibody specificityResearch sponsored by the U.S. National Science Foundation and the Medical Research Council, London. (1966)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Cellular Physiology 67 (1966), S. 51-64 
    Details
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Subunits of immunoglobulins have been prepared by two methods, both of which have contributed to our knowledge of the structural basis of antibody specificity. The first method is enzymic hydrolysis with either papain or pepsin and leads to the unequivocal conclusion that each combining site is contained in a fragment (Fab) of about 45,000 molecular weight and formed from the light chain and the N-terminal half of the heavy chain, the Fd fragment. The second method of preparing subunits is to reduce the interchain disulfide bonds and to isolate the chains. This should decide whether the combining site is in the Fd fragment, the light chain, or is formed jointly by both. In fact, considerable loss of affinity for the antigen follows, whatever technique is used to dissociate the peptide chains and, although many papers have been published on this subject, no definite answer has yet been obtained. Although the majority opinion probably favors the view that both chains are concerned in the formation of the combining site, our tentative conclusion is that the site is placed entirely in the heavy chain and that the light chain has only a semispecific role in facilitating the reformation of the native configuration of the heavy chain after its disruption under the conditions necessary for dissociation of the two chains.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcp.1040670407
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  • 7
    Electronic Resource
    Electronic Resource
    Characterization of ethylene-propylene block copolymers by proton magnetic resonance (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-1: Polymer Chemistry 4 (1966), S. 189-195 
    Details
    ISSN: 0449-296X
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A high-resolution proton magnetic resonance compositional analysis has been developed for propylene polymers containing 0-40 wt.-% ethylene as either homopolymer or copolymer blocks. The test is independent of tacticity and provides qualitative information on copolymer sequencing and propylene chain structure. The analysis was developed using a series of standard reference polymers synthesized to contain various ratios of C14-tagged ethylene and propylene. The compositional standards were established by radiotracer analysis for C14 and by preparing weighed physical mixtures of homopolymers. Spectra were obtained at 200 ± 10°C. by placing externally heated polymer solutions into a conventional probe of a Varian A-60 proton spectrometer. All measurements were made on ± 10% polymer solutions in diphenyl ether. Analyses are accurate to about ± 10% at higher ethylene concentrations. The method is sensitive, with less precision, to below 1% for ethylene either as blocks or homopolymer.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.150040112
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  • 8
    Electronic Resource
    Electronic Resource
    Effect of temperature and polymer type on gel permeation chromatographyPart X in a series of papers on column fractionation of polymers. (1967)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-1: Polymer Chemistry 5 (1967), S. 987-991 
    Details
    ISSN: 0449-296X
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A series of polyisobutene and polystyrene fractions was subjected to gel-permeation chromatography at 150°C. The two types resulted in distinctly different calibration curves in a plot of projected, extended chain length versus elution volume. The average end-to-end distances of the samples were determined by intrinsic viscosity measurements. It was found that these data plotted versus elution volume could be represented by a common curve for both polymer types. The elution volumes of the polyisobutene series were determined at three additional temperatures, 35, 70, and 110°C. It could be shown that elution volume is again determined by polymer coil size at the temperature of measurement.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1967.150050504
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  • 9
    Electronic Resource
    Electronic Resource
    Method of calibrating gel permeation chromatography with whole polymers (1967)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-1: Polymer Chemistry 5 (1967), S. 1391-1394 
    Details
    ISSN: 0449-296X
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Column systems for gel permeation chromatography are usually calibrated by eluting a series of sharp polymer fractions of known molecular weights and by correlating their elution volumes with molecular size or weight. A different method for calibration is proposed in which only one polymer sample, with a broad, well-characterized molecular weight distribution, is used. The cumulative distribution and the integrated, normalized GPC chromatogram are successively superimposed, and molecular weights and corresponding elution volumes are correlated. It is found that calibration curves obtained in this manner show a definite curvature. A possible explanation and correction for this behavior is given, based on the concentration dependence of elution volumes.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1967.150050619
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