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  • 1
    Monograph available for loan
    Monograph available for loan
    Study on SAR land applications for snow and glacier monitoring : final report (1988)
    Innsbruck : Institut für Meteorologie und Geophysik
    Details Availability
    Call number: MOP 47399 / Mitte
    Type of Medium: Monograph available for loan
    Pages: v, 210 Seiten , Illustrationen, Diagramme , 30 cm
    Series Statement: European Space Agency Contract Report
    Language: English
    Note: Investigation of possibilities and requirements of synthetic aperture radar for snow and glacier applications in comparison and in combination with other sensors. Presents results on dielectric properties and on backscattering and emission signatures of snow and ice. Snow and glacier monitoring capabilities of satellite sensors in optical and microwave regions are compared for key applications. Includes appendix by B. Reber on snow structure and texture.
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 2
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    Stable Carbon Isotope Signature of Methane Released From Phytoplankton (2023)
    Details
    Publication Date: 2023-07-26
    Description: 〈title xmlns:mml="http://www.w3.org/1998/Math/MathML"〉Abstract〈/title〉〈p xmlns:mml="http://www.w3.org/1998/Math/MathML" xml:lang="en"〉Aquatic ecosystems play an important role in global methane cycling and many field studies have reported methane supersaturation in the oxic surface mixed layer (SML) of the ocean and in the epilimnion of lakes. The origin of methane formed under oxic condition is hotly debated and several pathways have recently been offered to explain the “methane paradox.” In this context, stable isotope measurements have been applied to constrain methane sources in supersaturated oxygenated waters. Here we present stable carbon isotope signatures for six widespread marine phytoplankton species, three haptophyte algae and three cyanobacteria, incubated under laboratory conditions. The observed isotopic patterns implicate that methane formed by phytoplankton might be clearly distinguished from methane produced by methanogenic archaea. Comparing results from phytoplankton experiments with isotopic data from field measurements, suggests that algal and cyanobacterial populations may contribute substantially to methane formation observed in the SML of oceans and lakes.〈/p〉
    Description: Plain Language Summary: Methane plays an important role in atmospheric chemistry and physics as it contributes to global warming and to the destruction of ozone in the stratosphere. Knowing the sources and sinks of methane in the environment is a prerequisite for understanding the global atmospheric methane cycle but also to better predict future climate change. Measurements of the stable carbon isotope composition of carbon—the ratio between the heavy and light stable isotope of carbon—help to identify methane sources in the environment and to distinguish them from other formation processes. We identified the carbon isotope fingerprint of methane released from phytoplankton including algal and cyanobacterial species. The observed isotope signature improves our understanding of methane cycling in the surface layers of aquatic environments helping us to better estimate methane emissions to the atmosphere.〈/p〉
    Description: Key Points: Stable carbon isotope values of methane emitted from six phytoplankton cultures incubated in the laboratory. Isotope fractionation between methane source signature and biomass of widespread algal and cyanobacterial species. Isotopic patterns of methane released by phytoplankton may be clearly distinguished from methane formed by methanogenic archaea.
    Description: Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659
    Description: Spanish Ministry of Universities
    Description: https://doi.org/10.11588/data/YYLEKU
    Keywords: ddc:551.9 ; methane ; stable isotopes ; phytoplankton ; algae ; cyanobacteria ; methane paradox
    Language: English
    Type: doc-type:article
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    CITATION GEO-LEO
  • 3
    Electronic Resource
    Electronic Resource
    Remarks on A critique of pure reason by Drew McDermott (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Computational intelligence 3 (1987), S. 0 
    Details
    ISSN: 1467-8640
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Computer Science
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-8640.1987.tb00205.x
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  • 4
    Electronic Resource
    Electronic Resource
    Time revisited (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Computational intelligence 6 (1990), S. 0 
    Details
    ISSN: 1467-8640
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Computer Science
    Notes: Temporal reasoning is essential for many artificial intelligence applications. To date, most research has concentrated on temporal inference in isolation without considering the role it can play in a more general reasoning environment. This paper takes an efficient temporal reasoner and extends its inferential capabilities to handle both strict and nonstrict relations. The resulting temporal specialist is incorporated into a system intended for low-level reasoning in natural language understanding. The specialist assists the resolution-based theorem prover in function evaluation, literal evaluation, and generalized resolving and factoring. The combined system can do some proofs in just a few steps that would normally require many. An example from the fully operational hybrid system is included.Le raisonnement temporel est essentiel dans de nombreuses applications relatives àľ intelligence artificielle. Jusqu’à présent, la plupart des travaux de recherche ont porté sur ľ inférence temporelle dans ľ isolation sans tenir compte du rǒle qu'elle peut jouer dans un environnement de raisonnement plus général. Cet article traite ? un raisonneur temporel ef ficace dont les capacityés inférentielles ont été augmentée afin de pouvoir traiter les relations strides et non strides. Le spécialiste temporel qui en résulte est intégréà un système conçu pour le raisonnement bas-niveau en langage naturel. Le spécialiste assiste le démonstratur de théorèmes basé sur la résolution dans ľévaluation des fonctions, ľévaluation littérale et la fonction fadorielle généralisée. Le système combine peut vérifier des preuves en quelques étapes seulement au lieu ? un grand nombre. Un exemple ? un système hybride entièrement opérationnel est fourni. Mots clés: raisonnement temporel, methodes ? inférence spéciales, résolution de théories, représentation des connaissances.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-8640.1990.tb00294.x
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  • 5
    Electronic Resource
    Electronic Resource
    Cheeseman: a travesty of truth (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Computational intelligence 4 (1988), S. 0 
    Details
    ISSN: 1467-8640
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Computer Science
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-8640.1988.tb00110.x
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  • 6
    Electronic Resource
    Electronic Resource
    Parasexual cycle in dermatophytes (1972)
    Springer
    Cellular and molecular life sciences 28 (1972), S. 711-711 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Die diploiden Stämme und die von ihnen gewonnenen mitotischen Rekombinanten beim DermatophytenMicrosporum gypseum werden beschrieben.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01944995
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  • 7
    Electronic Resource
    Electronic Resource
    Griseofulvin resistance in dermatophytes (1970)
    Springer
    Cellular and molecular life sciences 26 (1970), S. 109-110 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Häufigkeit und Eigenschaften der griseofulvinresistenten Mutanten vonMicrosporum gypseum wurden geprüft. 2 Loci, durch welche die Resistenz gesteuert wird, wurden in verschiedenen Kopplungsgruppen identifiziert und im Vergleich mit dem Ausgangsstamm die Resistenz bei allen Mutanten hundertfach vergrössert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01900425
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  • 8
    Electronic Resource
    Electronic Resource
    Strahleninduzierte Mutationen Bei Dermatophyten II. Farbmutanten Und Mutanten Mit Reduziertem Wachstum Von Microsporon Gypseum (Bodin) Guiart & Grigoraki (1968)
    Springer
    Mycopathologia 34 (1968), S. 49-60 
    Details
    ISSN: 1573-0832
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Summary The ascospores from crossing of two virulent cultures ofMicrosporon gypseum (Bodin)Guiart &Grigoraki (St. perf.Nannizzia incurvata Stockd.) were treated by the UV radiation (LD 99). By repeated selection 17 colour mutants and mutants with decreased growth were isolated. These mutants were constant during twenty transfers on agar medium. Their morphology, growth rate on Sabouraud's medium, compatibility, virulence, sensitivity to griseofulvin in vitro, growth on hair in vitro and perforation activity on hair is described in the present report. Keratinolytic activity was preserved in all mutants. The other features observed were markedly and constantly changed (aberrant production of chlamydospores, loss of ability to produce macroconidia, loss of virulence, increase in sensitivity to griseofulvin, loss of compatibility, increased or decreased growth rate). Some cultures by their faviform character, by pigmentation and micromorphology imitate cultures of other dermatophytes.
    Notes: Zusammenfassung Ascosporen aus einer Kreuzung virulenter Kulturen vonMicrosporon gypseum (Bodin)Guiart &Grigoraki (Status perfectusNannizzia incurvata Stockdale) wurden bei LD 99 mit UV-Licht bestrahlt. Durch wiederholte Selektion wurden 17 Farbmutanten und Mutanten mit reduziertem Wachstum gewonnen. Die veränderten Kulturen waren auch in der 20. Passage auf Agarnährboden beständig. Es wird ihre Morphologie, Wachstumsschnelligkeit auf Glukoseagar nachSabouraud, sexuelle Kompatibilität, Virulenz, Griseofulvinempfindlichkeit in vitro, Wachstum und Perforationsaktivität auf Menschenhaaren in vitro beschrieben. Bei allen Kulturen blieb die keratinolytische Aktivität erhalten. Andere verfolgte Merkmale der Kulturen waren auffällig und ständig verändert (abnormal erhöhte Chlamydosporenbildung, Verlust der Makrokonidienbildung und Virulenz, erhöhte Griseofulvinempfindlichkeit, Verlust der sexuellen Kompatibilität, Verminderung oder Vergrößerung der Wachstumsschnelligkeit). Einige Kulturen imitierten durch ihren faviformen Charakter, durch die Pigmentation und Mikromorphologie die Kulturen anderer Dermatophytenarten.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02050845
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  • 9
    Electronic Resource
    Electronic Resource
    Strahleninduzierte Mutationen bei Dermatophyten I. Morphogenetische Mutanten von Microsporon Gypseum (Bodin) Guiart & Grigoraki (1967)
    Springer
    Mycopathologia 33 (1967), S. 321-337 
    Details
    ISSN: 1573-0832
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Summary The F1 and F2 ascospores from crossing between virulent cultures (f.incurvata × f.incurvata; f.incurvata × f.lanogypsea) ofMicrosporon gypseum (Bodin)Guiart etGrigoraki (Status perf.Nannizzia incurvata Stockdale) were treated by UV radiation (51.2 mW/cm2, LD 99). Twenty-six morphological mutants were isolated. The persistence of morphological changes was proved by twenty transfers (interval of transfer: three or four weeks). According to the characteristic features of the colony the mutants were classified in three groups: fluffy cultures, grainy cultures and interchanging cultures. The authors described the morphology of mutants, their growth rate on agar medium, compatibility, pathogenicity, sensitivity to griseofulvin, growth of mutants on hair and the manner of hair destruction.
    Notes: Zusammenfassung F1 und F2 Askosporen aus einer Kreuzung (f.incurvata × f.incurvata; f.incurvata × f.lanogypsea) virulenter Kulturen des DermatophytenMicrosporon gypseum (Bodin)Guiart etGrigoraki (Status perf.Nannizzia incurvata Stockdale) wurden bei LD 99 mit UV — Licht bestrahlt (51,2 mW/cm2). Durch Selektion wurden 26 morphogenetische Mutanten gewonnen. Die Beständigkeit der Mutationen wurde durch Kultivierung der Mutanten in 20 Passagen in vitro bei einem Überimpfungsinterwall von 3–4 Wochen überprüft. Nach der Makromorphologie der Kolonien wurden die Mutanten in eine Gruppe der flaumigen Kulturen, in eine Gruppe der körnigen Kulturen und in eine Gruppe der Übergangskulturen geteilt. Es wird die Morphologie der Mutanten beschrieben, ihre Wachstumsschnelligkeit auf dem Agarboden, die Kompatibilität und Virulenz, die Griseofulvinempfindlichkeit, das Wachstum der Mutanten auf dem Haar und die Weise seines Zerfalls.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02088923
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  • 10
    Electronic Resource
    Electronic Resource
    Strahleninduzierte Mutationen bei Dermatophyten III. Untersuchungen über den Zusammenhang der Virulenz mit der Mikromorphologie und der keratinolytischen Aktivität (1968)
    Springer
    Mycopathologia 34 (1968), S. 123-128 
    Details
    ISSN: 1573-0832
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Summary 1. From the morphologically normal strain ofMicrosporon gypseum eight groups of mutants were selected: 1. strains with production of macroconidia, microconidia and chlamydospores, 2. strains with macroconidia and microconidia, 3. strains with macroconidia and chlamydospores, 4. strains with microconidia and chlamydospores, 5. strains with macroconidia only, 6. strains with microconidia only, 7. strains with chlamydospores only, 8. mycelial strains without production of spores. 2. All the strains of the eight group were keratinolytically active in vitro and sensitive to griseofulvin. Quantitative differences, in the features evaluated, were only found. Some mutants were more than 10 times more sensitive to griseofulvine in comparison with the wild strains. 3. Avirulent strains were isolated from the virulent wild strainM. gypseum. 4. The strains producing only chlamydospores and mycelial strains without sporulation were avirulent in all cases. The greater part of conidia producing strains remained virulent. 5. No relationship between the degree of keratinolytic activity in vitro and virulence in vivo was found. The virulence itself cannot be determined only by an increase in keratinolytic activity in vitro.
    Notes: Zusammenfassung 1. Aus morphologisch normaler Kultur vonMicrosporon gypseum wurden die UV-Mutanten folgender acht Kategorien selektiert: 1. Kulturen, die Makrokonidien, Mikrokonidien und Chlamydosporen bilden, 2. Kulturen mit Makrokonidien und Mikrokonidien, 3. Kulturen mit Makrokonidien und Chlamydosporen, 4. Kulturen mit Makrokonidien und Chlamydosporen, 5. Kulturen nur mit Makrokonidien, 6. Kulturen nur mit Mikrokonidien, 7. Kulturen nur mit Chlamydosporen, 8. Kulturen vollständig ohne Sporen. 2. Alle Kulturen dieser Mutantenkategorien zeigten in vitro die keratinolytische Aktivität und die Griseofulvinempfindlichkeit. Bei den Mutanten wurden nur quantitative Unterschiede in diesen Eigenschaften beobachtet. Manche mutierten Kulturen waren mehr als zehnmal griseofulvinsensitiver als die Ausgangskulturen. 3. Aus den virulenten Kulturen vonM. gypseum wurden avirulente Kulturen isoliert. 4. Die Kulturen, welche nur Chlamydosporen bildeten und solche, die überhaupt keine Sporenbildung aufwiesen, waren in allen Fällen avirulent. Die konidienbildenden (Makrokonidien, Mikrokonidien) mutierten Kulturen waren in den meisten Fällen virulent. 5. Es wurde kein Zusammenhang zwischen der keratinolytischen Fähigkeit in vitro und der Virulenz der Kultur in vivo gefunden. Die in vitro erhöhte keratinolytische Aktivität des DermatophytenM. gypseum determiniert selbst nicht seine Virulenz.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02051421
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