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  • Chemistry  (16)
  • 74.25 Fy  (1)
  • ENERGY PRODUCTION AND CONVERSION  (1)
  • 1
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    Hot-water aquifer storage: A field test (1980)
    In:  CASI
    Details
    Publikationsdatum: 2016-06-07
    Beschreibung: The basic water injection cycle used in a large-scale field study of heat storage in a confined aquifer near Mobile, Alabama is described. Water was pumped from an upper semi-confined aquifer, passed through a boiler where it was heated to a temperature of about 55 C, and injected into a medium sand confined aquifer. The injection well has a 6-inch (15-cm) partially-penetrating steel screen. The top of the storage formation is about 40 meters below the surface and the formation thickness is about 21 meters. In the first cycle, after a storage period of 51 days, the injection well was pumped until the temperature of the recovered water dropped to 33 c. At that point 55,300 cubic meters of water had been withdrawn and 66 percent of the injected energy had been recovered. The recovery period for the second cycle continued until the water temperature was 27.5 C and 100,100 cubic meters of water was recovered. At the end of the cycle about 90 percent of the energy injected during the cycle had been recovered.
    Schlagwort(e): ENERGY PRODUCTION AND CONVERSION
    Materialart: NASA. Lewis Res. Center Thermal Energy Storage; p 601-606
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
    Digitale Medien
    Digitale Medien
    Doping dependence of the critical field Hc2 and the transition temperature in Zn doped YBa2(Cu1−xZnx)3O7−δ (1997)
    Springer
    Journal of low temperature physics 107 (1997), S. 491-496 
    Details
    ISSN: 1573-7357
    Schlagwort(e): 74.72 Bk ; 74.25 Fy ; 74.25 Ha
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We present data on the doping dependence of Tc in Zn doped YBa2(Cu1−xZnx)3O6.94, for x up to 10.6%. We find re-entrant behaviour in the range between 9.0 and 10.6% Zn. Data on the magneto-resistance of a sample with extremely low Tc (9% Zn, zero field resistive onset near 3.5 K) show linear normal resistance in all fields down to 1.8 K in 17.5 T. A resistively defined critical field H*, related to Hc2, shows divergent behaviour. The temperature dependence of H* is well represented by expressions derived for the Bose condensation of pre-formed pairs.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02397232
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    Artikel (Nationallizenzen)
    Volltext
  • 3
    Digitale Medien
    Digitale Medien
    Mathematical simulation of a biofilm process (1985)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 27 (1985), S. 921-931 
    Details
    ISSN: 0006-3592
    Schlagwort(e): Chemistry ; Biochemistry and Biotechnology
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: A mathematical model has been developed for a fixed-film biological process (film flow over a flat plate) that describes bulk liquid transport, diffusional transport of oxygen and organics across a stagnant film, diffusional transport of oxygen and organics into the biofilm, biochemical reactions by the individual cells within the biofilm, biofilm growth, and cell density changes within the biofilm due to cellular decay. Simulation studies are presented to show how contact time and diffusion layer thickness affect process performance.
    Zusätzliches Material: 12 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bit.260270702
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    Artikel (Nationallizenzen)
    Volltext
  • 4
    Digitale Medien
    Digitale Medien
    A model for the activated sludge process which considers wastewater characteristics, floc behavior, and microbial population (1984)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 26 (1984), S. 352-361 
    Details
    ISSN: 0006-3592
    Schlagwort(e): Chemistry ; Biochemistry and Biotechnology
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: A mathematical model has been developed which describes organics removal, oxygen utilization, ammonianitrogen removal, ortho-phosphate removal, and biomass production in an aggregated microbial suspension containing a uniform floc size and the organics as a soluble biodegradable material. It is applicable to both steady-state and transient conditions, as well as to systems experiencing only carbon oxidation or to systems experiencing both carbon oxidation and nitrification. The model, consisting of five partial differential equations and four ordinary differential equations, takes into account the flow pattern in the reactor, intraparticle mass transport of oxygen, organics, ammonia-nitrogen and ortho-phosphate, and biochemical reactions by the individual cells embedded in the floc.
    Zusätzliches Material: 8 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bit.260260410
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    Volltext
  • 5
    Digitale Medien
    Digitale Medien
    A kinetic model for the activated sludge process which considers diffusion and reaction in the microbial floc (1983)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 25 (1983), S. 2591-2615 
    Details
    ISSN: 0006-3592
    Schlagwort(e): Chemistry ; Biochemistry and Biotechnology
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: A mathematical model has been developed which describes substrate removal, oxygen utilization, and biomass production in an aggregated microbial suspension containing the substrate as a soluble biodegradable material and a uniform floc size. It is applicable to both steady-state and transient conditions. The model, consisting of three partial differential equations and two ordinary differential equations, takes into account the flow pattern in the reactor, intraparticle mass transport of oxygen and substrate, and biochemical reaction by individual cells embedded in the floc. Efficient numerical solution of the coupled nonlinear equations is obtained using an implicit finite difference approach for both the reactor and floc equations. A convergent solution is realized through block interation utilizing the tridiagonal algorithm. Results indicate that a unifying theory of activated sludge dynamics will have to consider coupling between floc chemical kinetics and changes in the bulk liquid characteristics. Floc size emerges as an important influence on system performance. It appears necessary to distinguish between a system response caused by diffuslonal resistances and nutrient limitations within the floc and a response caused by physiological adaption when analyzing the transient behavior of an activated sludge process. Future research should be devoted to rigorous laboratory determinations of model parameters along with extensions to include limitations of nutrients other than orgabnic carbon and oxygen.
    Zusätzliches Material: 17 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bit.260251109
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    Volltext
  • 6
    Digitale Medien
    Digitale Medien
    Synthesis and properties of new luminescent acridinium-9-carboxylic acid derivatives and their application in luminescence immunoasays (LIA) (1989)
    New York : Wiley-Blackwell
    Journal of Bioluminescence and Chemiluminescence 4 (1989), S. 136-139 
    Details
    ISSN: 0884-3996
    Schlagwort(e): Luminescent labels ; acridinium-9-thiocarboxylates ; acridinium-9-(N-sulphonyl)carboxamides ; emission kinetics ; tracer stabilities ; immunoassays ; hCG ; TSH ; AFP ; Chemistry ; Biochemistry and Biotechnology
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Biologie , Chemie und Pharmazie
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bio.1170040120
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    Artikel (Nationallizenzen)
    Volltext
  • 7
    Digitale Medien
    Digitale Medien
    Untersuchungen zur Konformation und elektronischen Struktur von Cyclooctadieninen (1985)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 118 (1985), S. 210-220 
    Details
    ISSN: 0009-2940
    Schlagwort(e): Chemistry ; Inorganic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Beschreibung / Inhaltsverzeichnis: Investigations on the Conformation and the Electronic Structure of CyclooctadienynesConformations and electronic structures of the cyclooctadienynes 1 and 2, predicted by semi-empirical quantum mechanics, are verified experimentally with the aid of 1H NMR and PE spectra. The results are correlated with those of other cycloalkynes 3-5 and cycloalkenes 6-11. In contrast to the decisive influence of the high geometrical ring strain in 1 and 2, homoaromaticity based on six almost planar π-electron centres is not significant.
    Notizen: Die mit semiempirischer Quantenmechanik vorhergesagten Konformationen und elektronischen Strukturen der Cyclooctadienine 1 und 2 werden experimentell an Hand von 1H-NMR- und PE-Spektren verifiziert. Dabei wird Bezug genommen auf eine Reihe von anderen, verwandten Cycloalkinen 3-5 und Cycloalkenen 6-11. Während die hohe geometrische Ringspannung entscheidenden Einfluß auf 1 und 2 hat, ist eine Homoaromatizität, die auf sechs nahezu eben angeordneten π-Elektronen-Zentren beruht, nicht signifikant.
    Zusätzliches Material: 6 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/cber.19851180120
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  • 8
    Digitale Medien
    Digitale Medien
    Kinetische Untersuchungen zu Diels-Alder-Reaktionen des Cyclooctins mit anschließender Aromatisierung (1984)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 117 (1984), S. 833-839 
    Details
    ISSN: 0009-2940
    Schlagwort(e): Chemistry ; Inorganic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Beschreibung / Inhaltsverzeichnis: Kinetic Investigations of Diels-Alder-Reactions of Cyclooctyne with Consecutive AromatizationThe tricyclic compounds 3a - g, generated from cyclooctyne (1) and the cyclic dienes 2a - g, show a totally different stability. 3a, b, f, and g decompose spontaneously. By elimination of CO2, SO2, CO, and N2, respectively, the aromatic systems 4a - c are formed. 3e loses C2H4 on heating. 3e is thermally cleaved only to a very small extent, but efficiently in the photolysis and finally 3d is stable against aromatization. Detailed kinetical measurements are performed of the thermal elimination of ethylene and of the photochemical bisdecarbonylation.
    Notizen: Aus Cyclooctin (1) und den cyclischen Dienen 2a - g entstehen die Tricyclen 3a - g, die ganz unterschiedliche Stabilität aufweisen. 3a, b, f und g zerfallen spontan. Unter Abspaltung von CO2, SO2, CO und N2 entstehen die aromatischen Verbindungen 4a - c. 3c eliminiert beim Erhitzen C2H4. 3e wird thermisch kaum mehr gespalten, aber ganz effizient bei der Photolyse, und 3d ist schließlich gegenüber einer Aromatisierung stabil. Die thermische Ethylenabspaltung und die doppelte Photodecarbonylierung werden kinetisch untersucht.
    Zusätzliches Material: 1 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/cber.19841170234
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  • 9
    Digitale Medien
    Digitale Medien
    1,2-Dihydropentalen aus 1,6-Cyclooctadien-3-inDiese Arbeit wurde von der Deutschen Forschungsgemeinschaft und dem Fonds der Chemischen Industrie unterstützt. (1982)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 94 (1982), S. 921-921 
    Details
    ISSN: 0044-8249
    Schlagwort(e): Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: No Abstract.Das vollständige Manuskript dieser Zuschrift erscheint in: Angew. Chem. Suppl. 1982, 2050-2055
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/ange.19820941209
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  • 10
    Digitale Medien
    Digitale Medien
    1,2-Dihydropentalen aus 1,6-Cyclooctadien-3-inDiese Arbeit wurde von der Deutschen Forschungsgemeinschaft und dem Fonds der Chemischen Industrie unterstützt. (1982)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 21 (1982), S. 2050-2055 
    Details
    ISSN: 0570-0833
    Schlagwort(e): Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Zusätzliches Material: 1 Tab.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/anie.198220500
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