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  • 11
    Electronic Resource
    Electronic Resource
    On potentials and general ergodic theorems for resolvents (1971)
    Springer
    Probability theory and related fields 20 (1971), S. 1-8 
    Details
    ISSN: 1432-2064
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00534162
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  • 12
    Electronic Resource
    Electronic Resource
    An analysis of the temperature response curves of CO2 exchange in the leaves of two temperate and one tropical grass species (1970)
    Springer
    Planta 94 (1970), S. 140-151 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The temperature dependence of carbon dioxide exchange in two temperate grass species, Lolium perenne (S.23) and Lolium multiflorum (S.22), and one tropical grass species, Cenchrus ciliaris, have been examined. It has been shown that the decline in the net CO2 exchange rate above the optimum temperature is caused, in the case of C. ciliaris, by denaturation, and, in the case of L. perenne and L. multiforum by the greater response to temperature of respiration compared with photosynthesis. Activation energies have been obtained for both photosynthetic and respiratory systems. For both systems the values fall into discrete groups, and it is postulated that each group may be characteristic of a particular rate-limiting process. The distribution of values changes with changes in experimental conditions, there being marked differences in the distribution of values obtained for light-limited and CO2-limited photosynthesis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00387758
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  • 13
    Electronic Resource
    Electronic Resource
    A quantitative description of inhibition of stem growth in vegetative lateral shoots of Chrysanthemum morifolium by N-dimethylaminosuccinamic acid (daminozide) (1973)
    Springer
    Planta 112 (1973), S. 71-82 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The concentration of N-dimethylaminosuccinamic acid (daminozide) in four lateral shoot fractions of vegetative plants of chrysanthemum morifolium cv. Bright Golden Anne was determined at intervals over twenty three days following 0.2%, 0.6% and 1.5% foliar spray applications of this growth retardant. The decrease in daminozide concentration in stem tissue conformed to first order kinetics, but in leaf fractions did not follow any simple pattern. Inhibition by daminozide of lateral shoot growth was wholly attributable to its effect on the stem. A mathematical treatment, based on an approach originally developed to describe inhibition of bacterial growth, describes the relationship between daminozide concentration in the stem and inhibition of growth in stem mass. The results quantitatively describe the phenomenon of “growing out” which is frequently observed in daminozide-treated plants, and suggest that daminozide exerts its primary effect at a site located in the stem.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00386033
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  • 14
    Electronic Resource
    Electronic Resource
    A simple kinetic model for leaf photosynthesis and respiration (1971)
    Springer
    Planta 101 (1971), S. 43-50 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A simple kinetic model for leaf photosynthesis and respiration is described. The model takes into account the different natures of the physical and chemical processes involved in photosynthesis, and examines the response of net photosynthesis to changes in the incident light flux density, ambient carbon dioxide concentration and leaf temperature. It is shown that a quantitative description of the response to light flux density may be obtained. The model qualitatively describes the response of net photosynthesis to changing ambient carbon dioxide concentration and temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00387689
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  • 15
    Electronic Resource
    Electronic Resource
    Models for mesophyll cell arrangement in leaves of ryegrass (Lolium perenne L.) (1972)
    Springer
    Planta 104 (1972), S. 297-305 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Three models for mesophyll cell arrangement in leaves of Lolium perenne L. are described. It is shown that mesophyll cells may be represented as spheres packed in a tetragonal lattice. The need to quantify mesophyll cell arrangement is discussed in relation to leaf photosynthesis. The variation on measurements of some anatomical features of leaves is examined and discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00386313
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  • 16
    Electronic Resource
    Electronic Resource
    Evidence for an olfactory receptor which responds to nicotine — nicotine as an odorant (1987)
    Springer
    Cellular and molecular life sciences 43 (1987), S. 868-873 
    Details
    ISSN: 1420-9071
    Keywords: Nicotine ; odorant ; electro-olfactogram ; olfaction ; receptor ; rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The tobacco alkaloid (S)(−)-nicotine, when applied as a vapour to an in vitro head preparation, stimulates the olfactory epithelium in three strains of rats and to a lesser extent in two strains of mice. The electro-olfactogram (EOG) generated by nicotine has similar characteristics to the EOGs produced by known odorants. The nicotine EOG increases with increasing concentration of nicotine vapour (1–100 nM) applied to the olfactory epithelium. Differential reduction of the nicotine EOG by the lectin concanavalin A is seen in Wistar and Lister Hooded rats. The reduction of the nicotine EOG by concanavalin A is prevented by adding alpha-methyl-D-mannoside to the lectin superfusion medium. This suggests that there is a glyco-moiety associated with at least one olfactory receptor responding to nicotine. Our results suggest that rat olfactory epithelium has receptor sites for nicotine. Nicotine is an unusual compound because it shows both odorant and pharmacological properties.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01951644
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  • 17
    Electronic Resource
    Electronic Resource
    The mutagenic potential of high flash aromatic naphtha (1989)
    Springer
    Cell biology and toxicology 5 (1989), S. 169-188 
    Details
    ISSN: 1573-6822
    Keywords: C9 Aromatic Hydrocarbons ; Ethyltoluene ; Genetic Toxicity ; High Flash Aromatic Naphtha ; Mutagenesis ; Trimethylbenzene
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Catalytic reforming is a refining process that converts naphthenes to aromatics by dehydrogenation to make higher octane gasoline blending components. A portion of this wide boiling range hydrocarbon stream can be separated by distillation and used for other purposes. One such application is a mixture of predominantly 9-carbon aromatic molecules (C9 aromatics, primarily isomers of ethyltoluene and trimethylbenzene), which is removed and used as a solvent — high-flash aromatic naphtha. A program was initiated to assess the toxicological properties of high-flash aromatic naphtha since there may be human exposure through inhalation or external body contact. The current study was conducted partly to assess the potential for mutagenic activity and also to assist in an assessment of carcinogenic potential. The specific tests utilized included the Salmonella/mammalian microsome mutagenicity assay, the hypoxanthine-guanine phosphoribosyl transferase (HGPRT) forward mutation assay in CHO cells, in vitro chromosome aberration and sister chromatid exchange (SCE) assays in CHO cells, and an in vivo chromosome aberration assay in rat bone marrow. There was no evidence that high-flash aromatic naphtha was either a gene or chromosomal mutagen. Thus it is unlikely to be a genotoxic carcinogen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00122651
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  • 18
    Electronic Resource
    Electronic Resource
    Sphincter mechanisms in the gastrointestinal tract (1967)
    Springer
    Digestive diseases and sciences 12 (1967), S. 267-276 
    Details
    ISSN: 1573-2568
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Conclusions Both exits from the abdomen for gut contents are associated with smooth-muscle sphincter-like segments of the gut tube in the sense that they are in a state of tonic contraction most of the time. Both these sphincters and their connections with the nervous system are interesting physiological phenomena, but their function appears to be secondary to a simple mechanical process which is responsible for closure of the tube and its controlled opening. Indeed, the body appears to be able to function satisfactorily without the sphincters, and their presence requires complex means of overcoming their unwanted activities. The detailed investigation of these sphincters has perhaps taken them out of their right perspective, and other factors, only determinable in the intact human, have been lost sight of.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02233644
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  • 19
    Electronic Resource
    Electronic Resource
    Esophageal pain and motility (1968)
    Springer
    Digestive diseases and sciences 13 (1968), S. 340-345 
    Details
    ISSN: 1573-2568
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02233009
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  • 20
    Electronic Resource
    Electronic Resource
    Discussion (1968)
    Springer
    Digestive diseases and sciences 13 (1968), S. 351-355 
    Details
    ISSN: 1573-2568
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02233011
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    Paper (German National Licenses)
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