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  • 1
    Electronic Resource
    Electronic Resource
    12-Hydroxy-E-γ-bisabolene, a new sesquiterpene alcohol from a Caribbean sea whip of the genusPseudopterogorgia (Gorgonacea, Cnidaria) (1984)
    Springer
    Cellular and molecular life sciences 40 (1984), S. 931-933 
    Details
    ISSN: 1420-9071
    Keywords: Caribbean sea whip ; sesquiterpene alcohol ; Pseudopterogorgia ; 12-hydroxy-E-γ-bisabolene
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A new sesquiterpene alcohol, 12-hydroxy-E-γ-bisabolene, is reported from an undescribed Caribbean sea whip of the genusPseudopterogorgia. The structure of this new alcohol was established based upon spectral analyses and through chemical interconversions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01946443
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  • 2
    Electronic Resource
    Electronic Resource
    The effect of pH and oxygen concentration on the formationof 3-ketodisaccharides by Agrobacterium tumefaciens (1995)
    Springer
    Applied microbiology and biotechnology 43 (1995), S. 706-712 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract  The further optimization of 3-ketodisaccharide formation with sucrose, leucrose and iso maltulose was studied with special regard to pH and oxygen concentration in the reaction mixture with resting cells of Agrobacterium tumefaciens. It was found that the optimal pH values for the highest reaction rate and highest yield were different as the pH affected the stability of the 3-keto derivatives formed. A pH shift to 5.0 clearly reduced the enzymatic degradation of the 3-keto derivatives thus stabilizing them. The influence of constant oxygen concentrations on 3-ketosucrose formation was tested showing results not explicable with normal Michaelis–Menten kinetics. For each substrate a maximum of reaction rate and yield were obtained at very low oxygen concentrations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00164777
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  • 3
    Electronic Resource
    Electronic Resource
    The effect of pH and oxygen concentration on the formation of 3-ketodisaccharides by Agrobacterium tumefaciens (1995)
    Springer
    Applied microbiology and biotechnology 43 (1995), S. 706-712 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract The further optimization of 3-ketodisaccharide formation with sucrose, leucrose and iso maltutose was studied with special regard to pH and oxygen concentration in the reaction mixture with resting cells of Agrobacterium tumefaciens. It was found that the optimal pH values for the highest reaction rate and highest yield were different as the pH affected the stability of the 3-keto derivatives formed. A pH shift to 5.0 clearly reduced the enzymatic degradation of the 3-keto derivatives thus stabilizing them. The influence of constant oxygen concentrations on 3-ketosucrose formation was tested showing results not explicable with normal Michaelis-Menten kinetics. For each substrate a maximum of reaction rate and yield were obtained at very low oxygen concentrations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00164777
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  • 4
    Electronic Resource
    Electronic Resource
    Zur Oligomeren-Bildung bei der Styrol-Polymerisation (1969)
    Springer
    Naturwissenschaften 56 (1969), S. 515-516 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00601975
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  • 5
    Electronic Resource
    Electronic Resource
    Derp 3/2-Analogzustand in51V (1970)
    Springer
    The European physical journal 238 (1970), S. 11-22 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In an investigation ofT=7/2 analogue states in51V the50Ti(p, γ) excitation curve has been measured for proton bombarding energies 1280–1480 keV and 2340–2660 keV. From the (p, γ) resonances 29 new virtual levels in the region of 9316–9510 keV excitation energy in51V were determined. The strong resonance atE p=1 371 keV has been identified as the isobaric analogue state of the51Ti ground state by determining spin and parity of this resonance to be 3/2−. There is no evidence for a strong analogue resonance in51V corresponding to the 1.16 MeV p 1/2 state in51Ti. The γ-decay of the p 3/2 analogue state has been studied by measuring branching ratios and angular distributions of primary γ-transitions with a Ge(Li) detector.M1E2 mixing ratios have been determined for these transitions. The total width of the resonance for γ-decay is found to be Γγ=1.6±0.4 eV. New bound levels in51V have been introduced at 3576, 4651 and 4661 keV excitation energy. TheJ π values of the 3085, 4770, and 4863 keV states are determined to be 5/2−, 5/2−, 3/2−, respectively. The analogue-antianalogueM1 transition strength is found to be considerably reduced compared to the situation ins-d shell nuclei.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01399574
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  • 6
    Electronic Resource
    Electronic Resource
    Nachweis für ein unstabiles Zwischen-produkt bei der thermischen Styrol-Polymerisation (1978)
    Springer
    Colloid & polymer science 256 (1978), S. 290-290 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01550614
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  • 7
    Electronic Resource
    Electronic Resource
    Microbial modification of sugars as building blocks for chemicals (1992)
    Springer
    Applied microbiology and biotechnology 36 (1992), S. 604-610 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Investigations on the microbial modification of sucrose to the corresponding 3-keto-derivative were carried out with resting cells of Agrobacterium tumefaciens NCPPB 396. This highly specific oxidation to yield the 3-keto-derivative has been analysed kinetically with varying substrate and cell mass concentrations. The formation of the corresponding 3-keto-derivative depended strongly on the reaction time and the aeration rate, and was maximal at aeration rates up to 11.5 volume air/cultivation volume per minute with resting cells. The product formation increased with increasing substrate concentrations. However, the product yield was maximal at substrate concentrations below 20 g/l. Data pertaining to the production of active cell mass as well as for maximal 3-keto-derivative formation are presented in this paper. Also included are some applications for these derivatives.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00183236
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  • 8
    Electronic Resource
    Electronic Resource
    Investigations on cephalosporin C adsorption kinetics and equilibria (1990)
    Springer
    Applied microbiology and biotechnology 32 (1990), S. 680-685 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary The kinetics and equilibria of cephalosporin C adsorption on different commercial adsorbents were investigated. Adsorption isotherms could be analysed according to the Brunauer, Emmett and Teller theory. For the interpretation of adsorption kinetics it was necessary to develop a more complex model comprising both a rapid and a slower step. An integrated approach combining kinetics and equilibria allowed for simulation of the experimental data and can be used as a basis for predicting technical approaches such as fluidized-bed technology.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00164739
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  • 9
    Electronic Resource
    Electronic Resource
    Criteria for the analysis of scientific quality (1995)
    Springer
    Scientometrics 32 (1995), S. 195-218 
    Details
    ISSN: 1588-2861
    Source: Springer Online Journal Archives 1860-2000
    Topics: Information Science and Librarianship , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Abstract One of the major questions in science research is addressed in detail, that is the problem of evaluation of research work both by objective characterization, accessible to proof, and by adequate characterization, referring to the content and cognitive level of the work under investigation. A short discussion of established methods by science indicators as well as by peer review compiles merits and shortcomings of these methods. A short review refers to a few approaches towards the development of criteria for an improved assessment and characterization of research work and their shortcomings are discussed. Notably for the evaluation of medium or low range quality no reliable method is available. Therefore a systematic compilation of criteria which covers the full range of excellence to failure with respect to scientific quality is developed and a comprehensive list of criteria is presented which should provide a basis both for objective and adequate characterization of publications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02016894
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  • 10
    Electronic Resource
    Electronic Resource
    The superposition eye of Cloeon dipterum: The organization of the lamina ganglionaris (1977)
    Springer
    Cell & tissue research 177 (1977), S. 9-28 
    Details
    ISSN: 1432-0878
    Keywords: Superposition eye ; Lamina ganglionaris ; Cloeon dipterum ; Light- and electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The lamina ganglionaris of the superposition eye of Cloeon dipterum is composed of separate optic cartridges arranged in a hexagonal pattern. Each optic cartridge consists of one central, radially branched monopolar cell (Li) surrounded by a crown of seven retinula cell terminals and two more unilaterally branched monopolar cells (La1/La2) situated close together outside the cartridge. Projections to neighbouring cartridges have not been observed. In most cases, synaptic contacts could be seen between a presynaptic retinula cell and more than two other postsynaptic profiles, which belong to monopolar cells or sometimes to glial cells. Seven retinula cell fibers of one ommatidium pass in a bundle through the basement membrane, run into their respective cartridges without changing orientation and terminate at approximately equal levels in the lamina. Long visual fibers with endings in the medulla are not visible in the superposition eye lamina, but are present in the lateral apposition eye. The relationship between the behaviour of the animal, optic mechanisms of the superposition eye and the structure of the lamina is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00221115
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