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  • Articles: DFG German National Licenses  (10)
  • Electronic Resource  (10)
  • 2000-2004  (4)
  • 1990-1994  (6)
  • 1980-1984
  • 1965-1969
  • 1900-1904
  • 2003  (4)
  • 1990  (6)
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  • Articles: DFG German National Licenses  (10)
Material
  • Electronic Resource  (10)
Years
  • 2000-2004  (4)
  • 1990-1994  (6)
  • 1980-1984
  • 1965-1969
  • 1900-1904
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    CONTACT CHEMORECEPTION IN FEEDING BY PHYTOPHAGOUS INSECTS (2003)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Entomology 48 (2003), S. 455-484 
    Details
    ISSN: 0066-4170
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Notes: Abstract Gustatory receptors associated with feeding in phytophagous insects are broadly categorized as phagostimulatory or deterrent. No phytophagous insect is known that tastes all its essential nutrients, and the ability to discriminate between nutrients is limited. The insects acquire a nutritional balance largely "adventitiously" because leaves have an appropriate chemical composition. Sugars are the most important phagostimulants. Plant secondary compounds are most often deterrent but stimulate phagostimulatory cells if they serve as host-indicating sign stimuli, or if they are sequestered for defense or used as pheromone precursors. The stimulating effects of chemicals are greatly affected by other chemicals in mixtures like those to which the sensilla are normally exposed. Host plant selection depends on the balance of phagostimulatory and deterrent inputs with, in some oligophagous and monophagous species, a dominating role of a host-related chemical. Evolution of phytophagy has probably involved a change in emphasis in the gustatory system, not fundamentally new developments. The precise role of the gustatory systems remains unclear. In grasshoppers, it probably governs food selection and the amounts eaten, but in caterpillars there is some evidence that central feedbacks are also involved in regulating the amount eaten.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.ento.48.091801.112629
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Large-scale genetic differentiation of Pagrus pagrus in the Atlantic (2003)
    Oxford, UK : Blackwell Science Ltd
    Journal of fish biology 62 (2003), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Red porgy Pagrus pagrus from the north-eastern, north-western and south-western Atlantic were found to be genetically distinct as determined by mitochondrial DNA analysis. There were no shared composite restriction fragment haplotypes, and nucleotide sequence differences averaged 2% among these locations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1095-8649.2003.00110.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Randomized comparison of photodynamic therapy with topical 5-fluorouracil in Bowen's disease (2003)
    Oxford, UK : Blackwell Science Ltd
    British journal of dermatology 148 (2003), S. 0 
    Details
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Summary Background Bowen's disease (BD; intraepithelial squamous cell carcinoma) is therapeutically challenging because lesions, which may be multiple, are frequently located at sites that heal poorly. There is a small risk of progression to invasive carcinoma. Photodynamic therapy (PDT) is an effective treatment for certain non melanoma skin cancers, but comparison studies with other, better-established therapies are limited. Objectives To compare the efficacy and tolerability of PDT and topical 5-fluorouracil (5-FU) in BD. Methods Forty patients from two centres were randomized to either topical PDT or 5-FU. The PDT group was treated with 20% 5-aminolaevulinic acid (ALA) applied 4 h before illumination with 100 J cm−2 narrowband red light (630 ± 15 nm). 5-FU was applied to lesions for 4 weeks. A repeat treatment cycle was performed after 6 weeks if required. Results Twenty-nine of 33 (88%) lesions treated with PDT initially responded completely, compared with 22 of 33 (67%) after 5-FU. After 12 months, two recurrences in the PDT group and six in the 5-FU group reduced complete clinical clearance rates to 82% and 48%, respectively. PDT was significantly more effective (P = 0·006, odds ratio 4·78, 95% confidence interval 1·56–14·62). In the 5-FU group, severe eczematous reactions developed around seven lesions, ulceration in three and erosions in two. No such reactions occurred following PDT. There was no difference in overall pain experienced during each therapy. Conclusions Topical ALA-PDT is more effective than topical 5-FU in the treatment of BD, with fewer adverse events. ALA-PDT should be considered one of the first-line therapeutic options for BD.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2133.2003.05033.x
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    The yrast spectroscopy of neutron-rich nuclei produced in deep-inelastic processes (2003)
    Springer
    The European physical journal 20 (2003), S. 111-112 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. The highly sensitive GASP array at the INFN Legnaro Laboratory was used to study the $\gamma$ -ray de-excitation of neutron-rich nuclei produced in the deep-inelastic processes which occur when 230 MeV 36S ions interact with a target of 176Yb. Yrast decay schemes were identified in over forty target-like fragments and in over twenty projectile-like fragments. Analysis of the data has resulted in extensions to the yrast decay sequences of the target-like species, 176Hf, 166Er, 172Yb, and 152Sm. New transitions have also been observed in a number of projectile-like species including 34P and 41Cl. Experimental results are compared with the results of shell model calculations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epja/i2002-10334-y
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Olfactory sensitivity of gomphocerine grasshoppers to the odours of host and non-host plants (1990)
    Springer
    Entomologia experimentalis et applicata 55 (1990), S. 205-212 
    Details
    ISSN: 1570-7458
    Keywords: Olfactory sensitivity ; grasshoppers ; electroantennogram ; Larrea ; hostplant
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Les réponses antennaires ont été examinées par électroantennogramme aux odeurs de plantes hôtes et non hôtes d'orthoptères Gomphocerinae de comportements alimentaires différents: Bootettix argentatus, monophage sur une dicotylédone, Larrea; Ligurotettix coquilletti, oligophage de dicotylédones; Cibolacris parviceps, polyphage; Chorthippus curtipennis, graminivore. Les types de réponse des quatre espèces étaient très voisins, mais les réponses aux odeurs de Larrea de B. argentatus et L. coquilletti, spécialistes de cette plante, étaient relativement plus fortes. Ces résultats suggèrent une similarité globale considérable dans la composition des populations de récepteurs olfactifs de ces quatre espèces d'orthoptères mais aussi une certaine spécificité pour les odeurs de la plante hôte au niveau antennaire.
    Notes: Abstract Antennal responses to host and non-host odours were recorded, using the electroantennogram technique, from four gomphocerine grasshoppers with different feeding habits: Bootettix argentatus (monophagous on Larrea, a dicotyledonous plant), Ligurotettix coquilletti (oligophagous on dicotyledonous plants), Cibolacris parviceps (polyphagous) and Chorthippus curtipennis (graminivorous). The patterns of responses across the plant odours were similar for all four grasshopper species, but there was a relatively greater response to the odour of Larrea in B. argentatus and L. coquilletti which specialise on this plant. This suggests that there is considerable overall similarity in the make up of the olfactory receptor populations of these four grasshoppers species, but that some specificity for hostplant odour does exist at the antennal level.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00190659
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    The immunology of primary sclerosing cholangitis (1990)
    Springer
    Springer seminars in immunopathology 12 (1990), S. 121-128 
    Details
    ISSN: 1432-2196
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Conclusion A number of recent studies have been discussed which provide strong evidence that genetic and immunological factors are important in the pathogenesis of PSC. Current evidence suggests that PSC is, like primary biliary cirrhosis, an immunologically mediated disease [8]. It seems likely that the immunological destruction of the biliary system is triggered in genetically predisposed individuals by viruses or bacteria [8]. The association with ulcerative colitis may be explained by the passage of viral or bacterial organisms across the damaged colonic epithelial barrier into the systemic circulation. Further studies are needed to confirm this attractive hypothesis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00192687
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Interactions between two neurons in contact chemosensilla of the grasshopper, Schistocerca americana (1990)
    Springer
    Journal of comparative physiology 167 (1990), S. 431-436 
    Details
    ISSN: 1432-1351
    Keywords: Contact chemosensilla ; Grasshopper ; Inhibition ; Nicotine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The tibial contact chemosensilla of Schistocerca americana contain several neurons, one of which responds to nicotine hydrogen tartrate and certain other compounds. The activity of this cell is sometimes briefly interrupted by the firing of a second cell in the same sensillum which usually only fires a few times in the first 500 ms of a stimulation. The evidence suggests that the nicotine-sensitive cell is directly inhibited by the activity of the second cell. Not all cells in the sensillum produce the same effect.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00192578
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  • 8
    Electronic Resource
    Electronic Resource
    A novel resin-filled ion-sensitive micro-electrode suitable for intracellular measurements in isolated cardiac myocytes (1990)
    Springer
    Pflügers Archiv 416 (1990), S. 196-200 
    Details
    ISSN: 1432-2013
    Keywords: Myocyte ; Intracellular ions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A method for the manufacture of ion-sensitive micro-electrodes, which can be readily used with small single cells, is described in detail. A glass pipette with a tip size of 1 μm, essentially similar to those used as suction electrodes in whole-cell recording, when silanized and with its tip filled with a suitable ion-sensitive resin, producesan ion-sensitive electrode with fast electrical and chemical response times. These electrodes can be applied to the cell membrane of isolated myocytes and penetration achieved without cell damage, by the application of suction. For the estimation of intracellular ionic activities they can be used in conjunction with a separate conventional KCl-filled micro-electrode or a suction voltage electrode. The technique is illustrated by the measurement of intracellular Na+, Ca2+ and pH. It is possible that these electrodes can also be used to measure local changes in ionic activity in restricted areas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00370242
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  • 9
    Electronic Resource
    Electronic Resource
    A system model for the ultrasonic inspection of smooth planar cracks (1990)
    Springer
    Journal of nondestructive evaluation 9 (1990), S. 197-210 
    Details
    ISSN: 1573-4862
    Keywords: Ultrasonic inspections ; theoretical modeling ; elastodynamic ; geometrical theory of diffraction ; Kirchhoff theory ; probe ; computer codes ; experimental validation ; defect detection ; power station plant
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Mathematics
    Notes: Abstract This paper describes a system model for the ultrasonic inspection of smooth planar cracks in ferritic steel, using pulse-echo probes. The model predicts the echo amplitudes and ranges as functions of the probe position. It is applied to problems of procedure design, assessment, and technical justification on power station plant. The model is implemented as a suite of versatile and user-friendly computer codes, suitable for use by practical NDT engineers, and is supported by a comprehensive user manual. The paper describes the principles of the model and gives examples of its application to power plant problems. Illustrations are also given of the extensive validation which the model has undergone through comparison with experiment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00566394
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  • 10
    Electronic Resource
    Electronic Resource
    Shape coexistence and strong shape changes in very neutron deficient platinum isotopes (1990)
    Springer
    The European physical journal 337 (1990), S. 283-292 
    Details
    ISSN: 1434-601X
    Keywords: 21.60.Ev ; 29.30.Kv ; 27.70.+q
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract High spin states of175, 176Pt have been populated in144Sm(35Cl,pxn) reactions at beam energies of 175–185 MeV. In-beamγ-ray spectroscopic techniques using the ESSA30 spectrometer array were adopted. Levels up to spin 26 in176Pt and tentatively up to spin 45/2 in175Pt have been identified. The data are interpreted within the framework of Cranked Shell Model calculations using the deformed Woods-Saxon potential and including monopole pairing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01289694
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    Paper (German National Licenses)
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