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  • Chemistry  (46)
  • PHYSICS, ATOMIC, MOLECULAR, AND NUCLEAR  (6)
  • 1965-1969  (52)
  • 1
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    Unknown
    In:  Other Sources
    Publication Date: 2019-06-27
    Description: Generalized stochastic equations of probability density distribution for particle system in random electric field, noting relationship to Fokker-Planck equation
    Keywords: PHYSICS, ATOMIC, MOLECULAR, AND NUCLEAR
    Type: JOURNAL OF PHYSICS, PART A - PHYSICAL SOCIETY, PROCEEDINGS (GENERAL), VOL. 1, P. 447-454.
    Format: text
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  • 2
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 11 (1969), S. 79-98 
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Heterogeneous populations of sewage origin were grown continuously at, dilution rates from 1/12 hr-1 to dilute-out (1/1 hr-1) using glucose (1000 mg/l) as carbon source and three concentrations of NH3-N as the nitrogen source (COD:N = 70:1, 40:1, and 25:1). The effects of nitrogen level and growth rate (dilution rate) on substrate removal, biological solids production, cellular carbohydrate and protein, and NH4+-N in the effluent were examined. It was found that the optimum level of nitrogen supplementation for the synthetic nitrogen-deficient waste employed should not be based solely on the desired effluent quality with respect to COD removal but should include due consideration of reactor detention time (or dilution rate) and the allowable (or desirable) level of nitrogen leakage in the effluent.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 11 (1969), S. 53-65 
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A synthetic waste (with glucose as carbon source) devoid of a source of nitrogen was purified in a laboratory scale pilot plant by a new modification of the activated sludge process. The process makes use of a separate carbon assimilation (oxidative assimilation) phase and an endogenous phase in which ammonia is added to a portion of the settled sludge and non-nitrogenous products stored in the cells in the assimilation phase are converted to protein. It was found that sludge so treated, when recycled to the assimilation tank, could carry out continuous oxidative assimilation of the waste. Various COD:N ratios were studied. At the highest, 70:1, 90% purificaton efficiency was achieved.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 11 (1969), S. 67-78 
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Batch experiments were run using heterogeneous populations to determine whether a hyperbolic equation of the type suggested by Monod could be used to depict the relation between specific growth rate, μ, and NH3-N concentration when ammonia N was the growth-limiting nutrient. The heterogeneous populations employed were developed from sewage seed grown on glucose at various levels of nitrogen and various dilution rates in completely mixed continuous flow reactors. It was found that the hyperbolic function could be used. Values of μm in the range of 0.4-0.7 hr-1 were observed, and values of Ks, in general, ranged from 1.5 to 4.0 mg/l. Variation in the values of these growth “constants” did not follow any discernible pattern related to past growth history (i.e., COD:N ratio or dilution rate at which the cells were previously grown).
    Additional Material: 4 Ill.
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  • 5
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 9 (1967), S. 171-186 
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Submerged acetification experiments were performed to determine conditions necessary for the production of a satisfactory vinegar from waste pineapple juice using a pure culture inoculum. Vinegars containing up to 7%, by weight of acetic acid could be produced in less than 24 hr. with a conversion efficiency greater than 90% in both laboratory and pilot plant equipment. None of the bacterial nutrients added to the juice improved either the rate of production or the yield of acetic acid. Oxygen transfer during the process is discussed.
    Additional Material: 6 Ill.
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  • 6
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 11 (1969), S. 1037-1041 
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 1 Tab.
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 18 (1967), S. 15-20 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Thio urea derivatives as vapour-phase corrosion inhibitorsThe authors have investigated the effect of allylthiourea, phenylthiourea, tetramethylthiuram monosulphide, N-phenyl-N'-p-tolylthiourea, tetramethylthiuram disulphide, diphenylthiourea and quinolin as corrosion inhibitors of mild steel in moisture saturated air. It was possible to find a relationship between the shift of the electrode potential towards more positive values and the inhibition effect as well as the degree of adsorption. In the anodic range, the polarisation change is less marked than in the cathodic range. Inhibition at the vapour phase always calls for adsorption; in addition, however, the wetting and hydrophobisation of the surface also play an important part. A comparison with the potentials and polarization values obtained from immersion tests gives rise to the assumption that, in an aqueous medium, the inhibition mechanism is different.
    Notes: Die Verfasser untersuchten die Wirkung von Allylthioharnstoff, Phenylthioharnstoff, Tetramethylthioharnstoff, Tetramethylthiurammonsulfid, N-Phenyl-N'-p-tolylthioharnstoff, Tetramethylthiuramdisulfid, Diphenylthioharnstoff, Chinolin als Inhibitoren der Korrosion von Weichstahl in feuchtigkeitsgesättigter Luft. Dabei konnte eine Beziehung zwischen der Verschiebung des Elektrodenpotentials nach positiveren Werten und der Hemmwirkung sowie dem Adsorptionsgrad gefunden werden. Die Polarisation wird im anodischen Bereich weniger stark verändert als im kathodischen Bereich. Die Inhibierung in der Dampfphase setzt immer eine Adsorption voraus, doch spielen daneben auch die Benetzung und Hydrophobisierung der Oberfläche eine wichtige Rolle. Ein Vergleich mit den in Tauchversuchen ermittelten Potential- und Polarisationswerten läß vermuten, daß im wäßrigen Medium der Inhibierungsmechanismus ein anderer ist.
    Additional Material: 7 Ill.
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  • 8
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 13 (1967), S. 1175-1180 
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The effects of viscous dissipation on fully developed laminar forced convection with heat sources in various regular polygonal ducts under the thermal boundary conditions of uniform wall heat transfer per unit duct length and circumferentially uniform wall temperature are approached by the method of point matching. The method uses the exact solutions to the governing partial differential equations and satisfies the boundary conditions exactly only at selected points. This method complements the method of complex variables for various noncircular geometrical configurations where the velocity and temperature fields are not deducible directly from the boundary equations. The relationship between the average velocity and the average of (grad u)2 over the cross section is pointed out. Other useful relationships between heat transfer quantities based on analogy or the observation of the results from literature and present investigation are also pointed out. The numerical results presented can be used to evaluate the effects of viscous dissipation on mean temperature, overall heat transfer rate at the boundary, heat transfer coefficient and Nusselt number. Graphical results for the representative cases are also presented for the heat transfer rate and the Nusselt number.
    Additional Material: 8 Ill.
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  • 9
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 12 (1966), S. 232-237 
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Analysis of the equations describing the instantaneous vapor and liquid flow through the holes of perforated distillation plates at low loads shows that periodic and stable pressure oscillations will always be set up between plates. These oscillations are expected to have amplitudes of the order of 0.1 in. of water and frequencies of a few cycles per second, values which are in accord with observation and which may be used as the basis for a model from which the seal point of the plates may be predicted.
    Additional Material: 2 Ill.
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  • 10
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 11 (1965), S. 176-192 
    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.
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