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  • Analytical Chemistry and Spectroscopy  (7)
  • ASTROPHYSICS  (3)
  • Biochemistry and Biotechnology  (3)
  • 2015-2019
  • 1990-1994
  • 1985-1989  (13)
  • 1970-1974
  • 1945-1949
  • 1989  (13)
Collection
Keywords
Publisher
Years
  • 2015-2019
  • 1990-1994
  • 1985-1989  (13)
  • 1970-1974
  • 1945-1949
Year
  • 1
    Electronic Resource
    Electronic Resource
    Surface immobilization of plant cells (1989)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 33 (1989), S. 293-299 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A novel technique has been developed to immobilize plant cells. The cells are deposited on a surface of manmade fibrous material that provides for strong binding of the plant tissue biomass growing in the submerged culture. The immobilized plant cells remain fully viable. Relatively uniform biomass loadings of up to 20 mg d.w. plant cells/cm2 support material have been attained. All plant cells from the inoculum suspension became attached within the first 24-48 h depending on the support matrix configuration and hydraulic culture conditions. The advantages and scale-up potential of this technique are discussed and compared to other culturing modes.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260330307
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    Paper (German National Licenses)
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  • 2
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    Significant variation from a 1/R-squared potential in the cumulative flux determined from the Giotto Comet Halley Dust Impact Experiment (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The Dust Impact Detection System (DIDSY) aboard the Giotto spacecraft provided the information on the dust flux, mass spectrum, and cumulative mass distribution flux in the coma of Comet Halley. Analysis of discrete pulse height data of cometary particles for the mass range of particles between 4.0 x 10 to the -10th g and 6.0 x 10 to the -6th g registered by the Giotto DIDSY detectors 2, 3, and 4 has been completed, and a cumulative flux has been determined for this size range of particles. Inside the cometopause, anomalous peaks have been identified as deviation from a 1/R-squared curve in both pre- and postencounter measurements.
    Keywords: ASTROPHYSICS
    Type: Lunar and Planetary Science Conference; Mar 14, 1988 - Mar 18, 1988; Houston, TX; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
    Electronic Resource
    Electronic Resource
    Activity of Pseudomonas aeruginosa in biofilms: Effect of calcium (1989)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 33 (1989), S. 406-414 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Aerobic glucose metabolism by Pseudomonas aeruginosa biofilms at various calcium loading rates was investigated. The influence of calcium on specific growth rate, extracellular polymeric substance (EPS) formation rate, biofilm detachment rate, and biofilm calcium concentrations was determined. Calcium accumulated in the biofilm in proportion to the liquid phase concentration. Increasing calcium concentration increased the cohesiveness of the biofilm as indicated by a lower relative detachment rate. Specific activity in the biofilm was the same as that measured in a chemostat and was not influenced by changing calcium concentration. EPS formation rate in the biofilm was unaffected by calcium concentration but was higher than that observed in a chemostat.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260330405
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Trends in the separation sciences (1989)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 12 (1989), S. 1-1 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240120102
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  • 5
    Electronic Resource
    Electronic Resource
    Routine luminescence immunoassays - dream or reality (1989)
    New York : Wiley-Blackwell
    Journal of Bioluminescence and Chemiluminescence 4 (1989), S. 79-87 
    Details
    ISSN: 0884-3996
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bio.1170040114
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  • 6
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    Accumulation of a swarm of small planetesimals (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: The present gasdynamic study of the planetesimal-accumulation stage in which 10-km bodies in the neighborhood of 1 AU grow to 10 to the 25th-10 to the 27th g mass, or 'planetary embryo' size, attempts to identify the circumstances under which runaway growth forms a small number of massive embryos in the terrestrial-planet region on a 0.1-1.0 million year time-scale. No runaways are found, however, unless more plausible physical processes are invoked; in that case, runaways in the terrestrial planet region are probable on a 0.1 million-year time-scale, and the final stage of planetary accumulation may involve the growth of these embryos into the present planets on a 10-100 million-year time-scale.
    Keywords: ASTROPHYSICS
    Type: Icarus (ISSN 0019-1035); 77; 330-357
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Further evidence for a circumstellar disk around PV Cephei (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Spectra of PV Cephei from 2 to 4 microns reveal a moderately strong 3 micron ice-absorption feature. Normally seen in objects with high visual obscuration, A(V) greater than 10, this absorption in an object with A(V) = 3.5-5.0 suggests the existence of a dense circumstellar disk. This paper discusses the evidence for a disk from this data and other wavelength regions, the possible origin of the 3-micron feature in PV Cephei, and the relationship between this object and other young stellar objects.
    Keywords: ASTROPHYSICS
    Type: Astronomical Journal (ISSN 0004-6256); 98; 1382-138
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
    Electronic Resource
    Electronic Resource
    Analysis of thermoplastic resins for brominated dibenzofurans (1989)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 18 (1989), S. 884-896 
    Details
    ISSN: 0887-6134
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Certain thermoplastic resins, brominated diphenyl ether flame retardants, a pyrolysate and fumes collected during resin extrusion were analyzed for brominated dibenzofurans (PBDF) to assess the potential for encountering PBDF in the environment. EPA methods (RCRA Method 8280 and CERCLA IFB WA84-A002) were modified as needed to allow determination of PBDF in these matrices. Except for the base resins, all samples were found to contain PBDF. The pyrolysate also contained compounds whose structures were assigned to be brominated dioxins (PBDD) and possibly brominated xanthenes (PBX) or methyl-PBDF.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200181008
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  • 9
    Electronic Resource
    Electronic Resource
    Negative ion chemical ionization mass spectrometry - binding of molecules to bromide and iodide anions (1989)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 24 (1989), S. 8-14 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The analytical potential of negative ion chemical ionization (NICI) mass spectrometry utilizing dibromodifluoro-methane (CF2Br2) and iodomethane (CH3I)/methane (CH4) as reagent gases is examined. The NICI mass spectrum of CF2Br2 contains Br-, [HBr2]- and [CF2Br3]- anions. Weak acids (i.e. those acids with approximately ΔH°(acid) values between 1674 and 1464 kJ mol-1) react with Br- to produce minor yields of the hydrogen-bonded bromide attachment [MH + Br]- anion or are unreactive. Strong acids (i.e. those acids with approximately ΔH°(acid) 〉 1464 kJ mol-1) produce primarily [MH + Br]- anions with a minor yield of proton transfer [M — H]- anion. The NICI spectrum of CH3I/CH4 is dominated by I-. Weak acids react with I- to yield minor amounts of [MH + 1]- or are unreactive. Strong acids produce only [MH + l]- anions. From a consideration of the gas-phase basicity of the halide anion and the binding energy of the hydrogen-bonded halide attachment adduct, thermochemical data are used as a potential guide to rationalize or predict the ions observed in NICI mass spectra.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210240103
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  • 10
    Electronic Resource
    Electronic Resource
    Two-dimensional NMR spectroscopy of LL-28249-α, a potent macrolide anthelmintic: 13C, 1H chemical shift assignments and solution conformation (1989)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 27 (1989), S. 437-444 
    Details
    ISSN: 0749-1581
    Keywords: Antiparasitic antibiotic ; Double-quantum NMR ; 2D13C NMR ; 1H NMR ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: LL-F28249-α is a potent antiparasitic antibiotic produced by Streptomyces cyaneogriseus ssp. noncyanogenus. Its complete 13C NMR spectral assignment based on two-dimensional double-quantum experiments in a sample at natural isotopic abundance is described. The proton NMR assignments were made from a combination of homonuclear and heteronuclear two-dimensional correlation experiments. Proton-proton scalar couplings, nuclear Over-hauser enhancements and molecular mechanics energy minimization calculations are also reported, permitting a comparison of solution conformation with the known x-ray structure adapted from a closely related analogue.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260270504
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