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  • Articles: DFG German National Licenses  (27)
  • 1995-1999  (27)
  • 1
    Electronic Resource
    Electronic Resource
    The orientation behaviour of the lesser spearnosed bat, Phyllostomus discolor (Chiroptera) in a model roost (1996)
    Springer
    Journal of comparative physiology 179 (1996), S. 245-254 
    Details
    ISSN: 1432-1351
    Keywords: Bat ; Orientation ; Vision ; Echolocation ; Cumulative navigation error
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The orientation behaviour of bats (Phyllostomus discolor, Phyllostomidae), flying inside an octagonal “roost-like” chamber (ø: 100cm; h: 150cm) was examined. It has been shown that the bats begin turning manoeuvres during flight by turning their head towards the direction they intend to proceed to. During early phases of the flights, cumulative navigation errors were evident, indicating that endogenous spatial information plays a major role in the orientation of the bats. During later phases of the flight this error is diminished again. So it can be concluded that the bats start to use exogenous spatial information for orientation while approaching the target. In order to investigate the relative importance of vision, echolocation and endogenous spatial information for approaching the roost, the landing lattices inside the test arena were changed for non-grid dummies. We found that: 1. combined visual and endogenous information are more important than echoacoustical cues, 2. the bats learned quickly to switch their orientation behaviour in order to get a better performance in avoiding the dummies, 3. the learning performance was influenced by the visual similarity of dummies and the real landing lattice.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00222791
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Generation of Quasiperiodic Structures by Amassment Centres in Multilattices (1998)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 54 (1998), S. 199-202 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: In this paper, a general method for generating quasiperiodic lattices is given. It is based on point multilattices which may be transformed into quasilattices in a new manner. A rounding operation allows the conversion of amassments of points in the multilattice into single points of a perfect quasicrystalline structure. Several examples are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767397012580
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    CT-gesteuerte Schneid-Saug-Biopsie zur minimal invasiven histologischen Abklärung pathologischer Thoraxbefunde (1999)
    Springer
    Zeitschrift für Herz-, Thorax- und Gefässchirurgie 13 (1999), S. 133-138 
    Details
    ISSN: 0930-9225
    Keywords: Schlüsselwörter Computertomographie – Thorax – Interventionen – Schneid-Saug-Biopsie ; Key words Computer tomography – thorax interventions – carve-suction biopsy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Problem: An investigation into CT-controlled carve-suction biopsy for a histological clarification of indefinite intrathoracic masses. Materials and Method: 143 CT-controlled interventions were performed on 102 patients. For histological evaluation purposes, tissue was taken under application of the carva-suction biopsy method (16–18 gage). The lesions with a diameter of 5–70 mm were located in the mediastinum (25%), were close to the thoracic wall/pleural (40%) and intrapulmonary (35%). Results: 92.2% (94/102) of the interventions provided histologically utilizable material in at least one biopsy specimen. The clinical suspected diagnosis was confirmed 78 times (76.5%), while a different discase was evident 16 times (15.7%). In 8 cases, a diagnosis was not possible (7.8%). The total complication rate was 21.6%. The following were observed: 18 pneumothoraxes, 2 hemothoraxes, and 2 patients who demonstrated a hemoptysis. In 4/102 patients (3.9%) complications arose which had to be treated therapeutically. Two-sided complications were not observed. Conclusions: The CT-controlled carve-suction biopsy can be employed histologically to clarify indefinite intrathoracic findings with a high degree of certainty and justifiable complication rates. In addition to this, the minimally invasive procedure helps to reduce costs.
    Notes: Zusammenfassung Fragestellung: Bewertet wird die CT-gesteuerte Schneid-Saug-Biopsie zur histologischen Abklärung unklarer intrathorakaler Raumforderungen. Material und Methode: Bei 102 Patienten wurden 143 CT-gesteuerte Interventionen durchgeführt. Zur histologischen Beurteilung wurde Gewebe in Schneid-Saug-Biopsie-Technik (16–18 Gage) entnommen. Die Läsionen waren 5–70 mm groß, 25% lagen mediastinal, 40% thoraxwandnah/pleural und 35% intrapulmonal. Ergebnisse: 92,2% (94/102) der Interventionen erbrachten in mindestens einer entnommenen Gewebeprobe histologisch verwertbares Material. Die klinische Verdachtsdiagnose wurde 78mal (76,5%) bestätigt, 16mal (15,7%) wurde eine andere Erkrankung nachgewiesen. 8mal ließ sich keine Diagnose stellen (7,8%). Die Komplikationsrate betrug 21,6% (18 Pneumothoraces, 2 Hämatothoraces und 2 Patienten mit Hämoptoe). Bei 4/102 Patienten (3,9%) traten therapiebedürftige Komplikationen auf. Schlußfolgerungen: Mit der CT-gesteuerten Schneid-Saug-Biopsie lassen sich unklare intrathorakale Befunde mit hoher Treffsicherheit und vertretbaren Komplikationen abklären.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003980050070
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Degradation of prochloraz and 2,4,6-trichlorophenol by environmental bacterial strains (1996)
    Springer
    Applied microbiology and biotechnology 45 (1996), S. 257-262 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract  Eight bacterial isolates from enrichment with 2,4,6-trichlorophenol (TCP) as sole carbon source were tested for their potential to degrade prochloraz. None of them could grow on prochloraz. Strain C964, identified as Aureobacterium sp., effectively reduced the fungitoxic activity of prochloraz in a bioassay and degradation was confirmed by HPLC. Two other isolates, strain C611 and C961, using TCP as a carbon source, belong to the β subclass of the proteobacteria and presumely degrade TCP via 2,4-dichlorohydroquinone and hydroxyhydroquinone as indicated by oxygen-consumption tests.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002530050680
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    A differential-pressure probe for velocity measurements in swirling air flows (1995)
    Springer
    Experiments in fluids 20 (1995), S. 134-135 
    Details
    ISSN: 1432-1114
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract For measuring air velocities in swirling flows a differential pressure probe of small axial length was developed. The determination of the velocity is based on measuring the difference between the stagnation pressure and the base pressure of a circular disk whose surface is perpendicular to the main flow direction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00189304
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  • 6
    Electronic Resource
    Electronic Resource
    A differential-pressure probe for velocity measurements in swirling air flows (1995)
    Springer
    Experiments in fluids 20 (1995), S. 134-135 
    Details
    ISSN: 1432-1114
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract For measuring air velocities in swirling flows a differential pressure probe of small axial length was developed. The determination of the velocity is based on measuring the difference between the stagnation pressure and the base pressure of a circular disk whose surface is perpendicular to the main flow direction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01061592
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  • 7
    Electronic Resource
    Electronic Resource
    Kutane Malakoplakie bei einem Patienten mit Psoriasis vulgaris (1996)
    Springer
    Der Hautarzt 47 (1996), S. 763-766 
    Details
    ISSN: 1432-1173
    Keywords: Schlüsselwörter Malakoplakie ; Kutane Manifestation ; Michaelis-Gutmann-Körperchen ; Psoriasis vulgaris ; Key words Malakoplakia ; Cutaneous manifestation ; Michaelis-Gutmann-bodies ; Psoriasis vulgaris
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary A 58 year old patient suffering from psoriasis vulgaris had typical erythematous, scaly plaques for 20 years. In addition, an erosive, therapy-resistant plaque was found in the perianal region. A biopsy was taken to exclude malignancy; it showed intracytoplasmic Michaelis-Gutmann-bodies as a marker for malakoplakia, which rarely occurs in the skin. In further electron microscopic investigation, intracytoplasmatic bacteria could be demonstrated. An underlying malignancy or chronic renal insufficiency with immunosuppression were not found in this patient; both are often associated with malakaplakia.
    Notes: Zusammenfassung Es wird über einen 58jährigen Patienten berichtet, bei dem seit 20 Jahren rezidivierend eine Psoriasis vulgaris mit typischen erythemato-squamösen Plaques an den Prädilektionsstellen besteht. Desweiteren fand sich perianal ein seit ca. 5 Jahren bekannter, therapieresistenter und teils erodierter Plaque. Die zum Ausschluß eines malignen Prozesses durchgeführte Probebiopsie ergab die seltene kutane Manifestation einer Malakoplakie durch den Nachweis der typischen intrazytoplasmatischen Michaelis-Gutmann-Körperchen sowie durch elektronenmikroskopisch nachweisbare intrazytoplasmatische Bakterien. Ein Tumorleiden oder eine Niereninsuffizienz mit entsprechender Immunsuppression, als häufig beobachtete Grunderkrankung der ätiopathogenetisch bisher nicht geklärten Malakoplakie, konnten bei dem hier vorgestellten Fall ausgeschlossen werden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001050050505
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Synthesis of non-proteinogenic (D)- or (L)-amino acids by asymmetric hydrogenation (1996)
    Springer
    Amino acids 11 (1996), S. 269-282 
    Details
    ISSN: 1438-2199
    Keywords: Amino acids ; Non-proteinogenic optically active amino acids ; D- and L-enantiomers ; Dehydroamino acids ; Chiral rhodium catalysts ; Asymmetric hydrogenation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Non-proteinogenic amino acids play an increasing role in oligopeptide chemistry. Their pharmacological and chemical properties, caused by D-configuration and “unnatural” residues, are more and more used for drug design. Different methods of asymmetric synthesis have been developed during the last decade to prepare “unusual” amino acids. One of them, the asymmetric hydrogenation of dehydroamino aids catalyzed by chiral rhodium (I) complexes, will be described. A series of examples, D- and L-configured, like naphthyl-, thienyl-, furyl-, and pyridylalanines, as well as phenylalanines substituted by chlorine, fluorine, p-nitro, p-methyl, p-trifluoromethyl, p-isopropyl, and p-tert-butyl have been prepared and characterized. Some analytical data like melting points and values of optical rotation are summarized in tables.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00807936
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  • 9
    Electronic Resource
    Electronic Resource
    An Investigation of CIO Photchemistry in the Chemically Perturbed Arctic Vortex (1999)
    Springer
    Journal of atmospheric chemistry 32 (1999), S. 61-81 
    Details
    ISSN: 1573-0662
    Keywords: chlorine monoxide ; photochemistry ; modeling ; partitioning
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract A new lightweight in situ instrument designed to measure ClO was flown on a balloon launched into the arctic vortex at dawn on February 3, 1995 at Kiruna, Sweden during the Second European Stratospheric Arctic and Mid-latitude Experiment (SESAME), together with instruments to measure ozone and long-lived tracers. Observations on ascent and descent at different solar zenith angles are compared to results from Lagrangian and box model calculations that assume the airmasses at similar potential temperatures had comparable photochemical histories. Between 20 and 22 km, in a region where ClO was significantly enhanced, a model constrained by currently recommended rate parameters significantly underestimates the abundances of ClO that were observed on ascent at high solar zenith angles, whereas the agreement is much better if a smaller ClO-Cl2O2 equilibrium constant, one inferred from previous ER-2 aircraft observations of ClO in the Arctic during nighttime, is assumed. On ascent, ClO is additionally enhanced in a narrow region between 20 and 21 km. We believe the most plausible explanation for this feature is rapid photolysis of OClO produced by the slow bimolecular reaction ClO + ClO over the 48 hours prior to the observations when the airmass was warmed to 225 K by adiabatic compression while in polar darkness. These results suggest that under special circumstances, OClO can be produced by a reaction other than one involving BrO, and, hence, OClO is not necessarily a universal proxy for BrO abundances in the perturbed polar vortex.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006136712267
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    Kann der Notarzt zum Risiko werden? (1999)
    Springer
    Notfall + Rettungsmedizin 2 (1999), S. 3-17 
    Details
    ISSN: 1436-0578
    Keywords: Key words Rescue management ; Quality control ; Standards of emergency medicine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Nevertheless, an increasing number of unnecessary rescue operations have been reported. Therefore the analysis of quality is demanded. For some years the concept of „medical control” has been successfully practised in the United States. To achieve for quality it is necessary to define quality and to fix standards. Several German organizations (DGU, DIVI, DGNC, DGAI) have already listed the standards of emergency medicine. A national standardized protocol could be introduced. In light of these standards it is now necessary to document the preclinical treatment and carry out quality control. Errors in a defined collective of patients are analysed and critical aspects in the management of critical care patients are discussed. As well as repeated insufficient management of trauma patients, the number of invasive techniques performed without indication is increasing.
    Notes: Trotzdem wird in den letzten Jahren immer häufiger über unnötige Einsätze und Fehlentscheidungen berichtet, so daß auch hier eine Qualitätsanalyse gefordert wird [32]. Dieses Konzept wird unter dem Begriff „Medical Control” bereits seit Jahren in den Vereinigten Staaten erfolgreich praktiziert [23]. Zielgrößen um die Qualität zu definieren und diese im Sinne der Qualitätssicherung einzusetzen, erfordert die Festschreibung von Standards [32]. Im Rahmen der Notfallmedizin sind Qualitätsstandards bereits von verschiedenen deutschen Organisationen (DGU, DIVI, DGNC, DGAI) zusammengestellt worden. Ein Bundeseinheitliches Notarztprotokoll konnte eingeführt werden [13] (Abb. 1). Es gilt nun die Daten der präklinischen Behandlung unter Berücksichtigung dieser Standards zu dokumentieren und eine Qualitätskontrolle vorzunehmen [12, 23, 32]. Anhand einer Fehleranalyse im eigenen Patientenkollektiv soll auf kritische Punkte der notärztlichen Versorgung von Unfallpatienten hingewiesen werden. Neben der immer wieder zu beobachtenden unzureichenden Versorgung von Traumapatienten, häufen sich in den letzten Jahren auch Fälle in denen nicht indizierte invasive Maßnahmen durchgeführt werden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100490050091
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    Paper (German National Licenses)
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