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  • Chemistry  (23)
  • Chemical Engineering  (4)
  • nucleotide sequence  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Characterisation of aminoglycoside acetyltransferase-encoding genes of neomycin-producing Micromonospora chalcea and Streptomyces fradiae
    Amsterdam : Elsevier
    Gene 101 (1991), S. 143-148 
    Details
    ISSN: 0378-1119
    Keywords: Recombinant DNA ; antibiotic resistance ; homologies ; nucleotide sequence ; promoter mapping
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0378-1119(91)90237-6
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  • 2
    Electronic Resource
    Electronic Resource
    Plasmid-encoded hygromycin B resistance: the sequence of hygromycin B phosphotransferase gene and its expression in Escherichia coli and Saccharomyces cerevisiae
    Amsterdam : Elsevier
    Gene 25 (1983), S. 179-187 
    Details
    ISSN: 0378-1119
    Keywords: Recombinant DNA ; aminocyclitol-modifying enzyme ; cross-species selective marker ; nucleotide sequence
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0378-1119(83)90223-8
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  • 3
    Electronic Resource
    Electronic Resource
    Plasmid-encoded hygromycin B resistance: the sequence of hygromycin B phosphotransferase gene and its expression in Escherichia coli and Saccharomyces cerevisiae
    Amsterdam : Elsevier
    Gene 25 (1983), S. 179-188 
    Details
    ISSN: 0378-1119
    Keywords: Recombinant DNA ; [abr] DTT; dithiothreitol ; [abr] EtBr; ethidium bromide ; [abr] HPH; hygromycin B phosphotransferase protein ; [abr] ORF; open reading frame ; [abr] SD; ribosomal binding site (Shine and Dalgarno,1974) ; [abr] SDS; sodium docecyl sulfate ; [abr] TBE; see MATERIALS AND METHODS,sectiond ; [abr] YEPD; YEPG YM media,ee MATERIALS METHODS,sectionb ; [abr] [ ]; indicates plasmid-carrier state ; [abr] amp; ampicillin ; [abr] bp; base pairs ; [abr] hph; hygromycin B phosphotransferase gene ; [abr] hyg; hygromycin B ; [abr] hyg^r; hygromycin B-resistant ; [abr] hyg^s; hygromycin B-sensitive ; [abr] kb; kilobase pairs ; [abr] tet; tetracycline ; aminocyclitol-modifying enzyme ; cross-species selective marker ; nucleotide sequence
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0378-1119(83)90223-8
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  • 4
    Electronic Resource
    Electronic Resource
    Biospecific adsorption of lysozyme onto monoclonal antibody ligand immobilized on nonporous silica particles (1989)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 34 (1989), S. 467-477 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: It is very important to understand the equilibrium and dynamic characteristics of biospecific adsorption (affinity chromatography) for both scientific and application purposes. Experimental equilibrium and dynamic column data are presented on the adsorption of lysozyme onto antibody immobilized on nonporous silica particles. The Langmuir model is found to represent the equilibrium experimental data satisfactorily, and the equilibrium association constants and heats of adsorption have been estimated for two systems with different ligand densities. The effects of nonspecific interactions are more pronounced in the system with low-density ligand. The dynamic interaction kinetic parameters are estimated by matching the predictions of a fixed-bed model with the experimental breakthrough curves. The agreement between theory and experiment is good for the initial phases of breakthrough, where the mechanism of biospecific adsorption is dominant. In the later phase (saturation neighborhood) of breakthrough, the effects of nonspecific interactions appear to be greater in the low-density ligand system. The kinetics of the nonspecific interactions were estimated from the data of the later phase of breakthrough and were found to be considerably slower than those attributed to biospecific adsorption.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260340406
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  • 5
    Electronic Resource
    Electronic Resource
    Comparison of the Size Distribution of Boron Powders as Measured by Malvern Diffractometer and Coulter Counter (1988)
    Weinheim : Wiley-Blackwell
    Particle and Particle Systems Characterization 5 (1988), S. 116-121 
    Details
    ISSN: 0934-0866
    Keywords: Chemistry ; Industrial Chemistry and Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Aspects of measuring the particle size distribution and median diameters of fine boron powders have been investigated. It has been demonstrated that high concentrations, typically 20 w/o, of wetting agent are necessary in a predispersion stage, especially if the material has a wide range of particle size. Measurements were made with both Coulter counting and a light scattering technique from which it has been demonstrated that for particles of median diameter in the range 10-30 μm, the latter oversizes with respect to the former by as much as 30%.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ppsc.19880050303
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  • 6
    Electronic Resource
    Electronic Resource
    A new stabilizing index to correlate foam height (1975)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 21 (1975), S. 599-600 
    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.690210327
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  • 7
    Electronic Resource
    Electronic Resource
    Turbulence and surface renewal at the clean surface of a stirred vessel (1984)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 30 (1984), S. 502-504 
    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.690300327
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  • 8
    Electronic Resource
    Electronic Resource
    Measurement of the surface ages of water jets (1978)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 24 (1978), S. 524-530 
    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: Experimental values of the surface velocities vs of water jets have been obtained by high speed flash cine photography of talc particles on the surfaces of both laminar and turbulent jets. Values of the surface ages as defined variously by Defay and Hommelen (1958), Hansen (1964), and Harper (1973) have been obtained from our data for both pure water and for dilute solutions of surface active agents.We find, by comparison with published entry length corrections for gas absorption, that x/vs gives the most reasonable age of the surface at any distance x along a jet of pure water.If a surface active agent is present in the water, the amount of adsorption of a few millimeters downstream from the nozzle is of the order ten times greater than calculated for laminar jets and five to six times greater than calculated for turbulent jets at Ren = 18 800. This we ascribe to liquid circulation in the jet adjacent to the nozzle, caused by the Marangoni surface flow, which also reduces vs significantly.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690240318
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  • 9
    Electronic Resource
    Electronic Resource
    Turbulence phenomena at free surfaces (1972)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 18 (1972), S. 169-173 
    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: Gas absorption by eddies at the free surface of a strongly turbulent liquid is interpreted quantitatively in terms of the Levich approach. The mass transfer coefficient is calculated to vary as Re to a relatively high power (1.3 to 1.5).Experiments on free turbulent jets of liquids in gas are in general accord with this theory. For turbulent films of liquids flowing over large roughness elements in “wake-interference” flow, the turbulence is anomalously efective in promoting gas absorption.Traces of surface-active agents suppress the surface renewal. This is analyzed theoretically: the results compare favorably with gas-absorption for stirred cells and flow experiments over smooth plates. For “wake-interference” flow over rough plates, the reduction in the rate of gas absorption by surface-active material is more pronounced than predicted for ordinary turbulence. But even in the presence of a surface-active agent, the roughness still gives an advantage in mass transfer rates as compared with smooth plates.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690180131
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  • 10
    Electronic Resource
    Electronic Resource
    An Alternative Synthesis of [Pd2Cl2(μ-dmpm)2] (1992)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 334 (1992), S. 34-36 
    Details
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A new, high yield synthesis of [Pd2Cl2(m̈-dmpm)2] (dmpm = bis(dimethylphosphino)methane), which avoids the use of the ill-defined, polymeric substance [PdCl(CO)]n as a starting material, is described. The procedure involves ligand metathesis of [Pd2Cl2(m̈-dppm)2] (dppm = bis(diphenylphosphino) methane) with dmpm using a solvent in which both [Pd2Cl2(m̈-dppm)2] and [Pd2Cl2(m̈-dmpm)2] are only sparingly soluble. Yields of 〉 98% are routinely obtained.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19923340106
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