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  • 1
    Electronic Resource
    Electronic Resource
    Translational energy distribution from ethyne + h.nu.(193.3 nm) .fwdarw. ethynyl radical + hydrogen atom (1991)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 95 (1991), S. 8078-8081 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100174a015
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Vibrationally resolved translational energy release spectra from the ultraviolet photodissociation of methyl mercaptan (1993)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 99 (1993), S. 6600-6606 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Product translational energy release spectra resulting from 248 and 193 nm photodissociation of methyl mercaptan are obtained for the hydrogen atom channels (CH3SH+hν→CH3S+H) by using the high-n Rydberg time-of-flight technique. The spectra exhibit vibrational structure that is assigned to a CH3–S stretch progression. At 248 nm, the progression extends only to v=2, while at 193 nm levels up to approximately v=17 are populated. The progression observed at 193 nm is bimodal, with the higher kinetic energy component showing greater spatial anisotropy than the lower energy component, suggesting that two different processes occurring on different time scales are responsible for the two components. The results at 248 nm are consistent with excitation to a repulsive electronic surface. For 193 nm excitation, the high kinetic energy component is consistent with direct photoexcitation to a repulsive surface and/or rapid intramolecular access to a repulsive surface. The lower kinetic energy component presumably derives from the molecule spending more time on an excited surface. A simple model is applied to estimate the extent of C–S bond extension for the various processes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.465852
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  • 3
    Electronic Resource
    Electronic Resource
    Inflammatory mediators and immunoglobulins in GCF from healthy, gingivitis and periodontitis sites (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of periodontal research 28 (1993), S. 0 
    Details
    ISSN: 1600-0765
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0765.1993.tb02121.x
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  • 4
    Electronic Resource
    Electronic Resource
    The group ofConocybe mesospora in Europe (Bolbitiaceae) (1992)
    Springer
    Plant systematics and evolution 180 (1992), S. 77-104 
    Details
    ISSN: 1615-6110
    Keywords: Fungi ; Basidiomycetes ; Agaricales ; Bolbitiaceae ; Conocybe ; New taxa and keys ; Mycoflora of Europe ; Brazil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract On the basis of studies of about 100 collections of the groupConocybe mesospora and after comparison of extra-European material we conclude that, within the European representatives of this complex, it is necessary to distinguish nine species and two varieties. Three new species are described:Conocybe subxerophytica Sing. & Hauskn.,C. minima Sing. & Hauskn. andC. roberti Sing. & Hauskn. C. mesospora var.subalpina Sing. is now recognized as an autonomous species, butC. brunneola (Kühn. ex)Kühn. & Watling is understood as variety ofC. microspora (Velen.)Dennis. C. excedens var.pseudomesospora Sing. & Hauskn. is described as a new variety.C. affinis Sing. is indicated for Europe.C. microsperma Sing. is the new name ofC. microspora (Vel.)Dennis ss.Dennis. A full description of nine taxa of this group is given and a key to 11 taxa occurring in Europe added. Seven taxa are illustrated for the first time with colored photographs. All taxa known to us from other continents and belonging to theC. mesospora group have been compared with the most similar European species or varieties.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00940399
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  • 5
    Electronic Resource
    Electronic Resource
    The pollination ofStenorrhynchos lanceolatus (Aublet) L. C. Rich. (Orchidaceae: Spiranthinae) by hummingbirds in southeastern Brazil (2000)
    Springer
    Plant systematics and evolution 223 (2000), S. 221-227 
    Details
    ISSN: 1615-6110
    Keywords: Orchids ; Spiranthinae ; pollination ; hummingbirds ; Stenorrhynchos lanceolatus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Hummingbird pollination is documented for a natural population ofStenorrhynchos lanceolatus Aublet. L. C. Rich. occurring in Rio de Janeiro State, southeastern Brazil. At the study site the plants are pollinated byPhaethornis eurynome (Phaethorninae),Thalurania glaucopis (females only) andLeucochloris albicollis (Trochilinae). The plants offer nectar as a reward and the pollinaria become stuck to the surface of the hummingbird's bill while it is probing the flowers. The orchid population received a few (0–4) hummingbird visits per day, with about 83% of the flowers being pollinated. In spite of the low frequency of visits, the granular structure of the pollinarium plus the behaviour of the most frequent pollinators, which tend to visit all the fresh-looking flowers of each inflorescence, a very high fruiting success was promoted. Experimental evidence suggests that the pollinaria may remain up to 6.30 hours on the hummingbird's bill, enhancing the chances of cross-pollination and long-distance pollen flow.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00985281
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    Paper (German National Licenses)
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