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  • Springer  (46)
  • Washington, DC : United States Gov. Print. Off.  (2)
  • American Association of Petroleum Geologists (AAPG)
  • 1
    Series available for loan
    Series available for loan
    Washington, DC : United States Gov. Print. Off.
    Associated volumes
    Call number: SR 90.0001(1141-O)
    In: U.S. Geological Survey bulletin
    Type of Medium: Series available for loan
    Pages: III, O-24 S. + 1 pl.
    Series Statement: U.S. Geological Survey bulletin 1141-O
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 2
    Series available for loan
    Series available for loan
    Washington, DC : United States Gov. Print. Off.
    Associated volumes
    Call number: SR 90.0001(1142-G)
    In: U.S. Geological Survey bulletin
    Type of Medium: Series available for loan
    Pages: III, G-16 S. + 7 pl.
    Series Statement: U.S. Geological Survey bulletin 1142-G
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Pharmacy world & science 2 (1980), S. 1493-1505 
    ISSN: 1573-739X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Samenvatting Vitaminen behoren tot de essentiële voedingsstoffen en moeten dus met de voeding worden opgenomen. Hoewel het gemiddelde in Nederland geconsumeerde voedingsmiddelenpakket, zowel kwalitatief als kwantitatief, voldoende Vitaminen lijkt te bevatten, zijn er desondanks aanwijzingen dat voor bepaalde groepen binnen de bevolking de vitaminestatus mogelijk niet optimaal is. Dergelijke, klinisch moeilijk herkenbare, hypovitaminosen kunnen ontstaan als gevolg van een verhoogde vitaminebehoefte of wanneer vitamineresorptie of -metabolisme zijn gestoord. In dit artikel wordt een algemeen overzicht gegeven omtrent behoefte en functie(s) van vitaminen, antivitaminewerkingen, vitaminoïden en provitaminen. Met name wordt ingegaan op die omstandigheden, waarbij een verhoogde vitaminebehoefte bestaat of waaronder vitaminetekorten kunnen ontstaan.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1573-739X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Samenvatting In dit artikel wordt een overzicht gegeven van de functie, het metabolisme en de behoefte aan de verschillende vitamines. Daarnaast wordt ingegaan op de therapeutische toepassing van vitamines. Behalve aan het gebruik van vitamines bij het behandelen van vitaminetekorten, wordt ook aandacht besteed aan de profylaxe van vitaminetekorten, bijvoorbeeld bij een verhoogde vitaminebehoefte. Ook wordt ingegaan op de toepassingen van vitamines bij ziektebeelden die niet direct of herkenbaar zijn gerelateerd aan een vitaminetekort.
    Notes: Abstract Function, metabolism and need of vitamins are discussed, together with their therapeutic application. Vitamins are not only used for treating vitamin deficiency, but also for preventing it.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Ein analytisches Interesse besitzen Photo-Depolarisatoren und photoreaktionsbedingte Diffusionsströme. Die zur Zeit häufigsten Photo-Depolarisatoren sind Radikale, die unmittelbar nach Photogenerierung oder nach ihrer Anregung Elektronen mit der Elektrode austauschen. Überwiegt bei ihnen die photochemische Weiterreaktion, so kann deren Quantenausbeute aus dem zugehörigen photoreaktionsbedingten Oxydationsstrom insbesondere bei Ketylen bestimmt werden.
    Notes: Summary Photo-depolarizers and diffusion currents caused by photoreaction are of some interest from the analytical point of view. Mostly investigated are free radicals, which are able to exchange electrons with the electrode surface after photogeneration or immediately after excitation. In the case of photochemical forward-reaction of the radicals the quantum requirement may be measured by means of the photoreaction-caused oxidation current, especially with ketyls.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1573-8248
    Keywords: rice ; predation ; biological control ; predator effectiveness ; riz ; prédation ; lutte biologique ; efficacité prédatrice
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Résumé Huit insectes prédateurs communs dans l'écosystème du riz aux Philippines ont été comparés au laboratoire pour leur capacité à se nourrir sur les œufs de la chenilleRivula atimeta Swinhoe. Une échelle basée sur les taux de prédation a été établie:Metioche vittaticollis (Stal) (Gryllidae) était le prédateur le plus vorace suivi parAnaxipha longipennis (Serville)(Gryllidae), Ophionea nigrofasciata (Schmidt-Goebel)(Carabidae), Micraspis nr.crocea (Mulsant) (Coccinellidae) etConocephalus longipennis (de Haan) (Tettigonidae). Le petit Miride,Cyrtorhinus lividipennis, se nourrissait aussi facilement sur les œufs.Paederus fuscipes (Curtis) (Staphilinidae) etCoccinella repanda (Thunberg) (Coccinellidae) se nourrissait dans une mesure très limitée.Metioche vittaticollis etCyrtorhinus lividipennis ont été aussi testés vis-à-vis des œufs de la NoctuelleNaranga aenescens Moore et de la Mineuse du Riz,Hydrellia philippina Ferino. Le taux de prédation deM. vitaticollis était identique sur les trois proies, maisC. lividipennis manifestait un taux de prédation plus élevé sur les œufs deN. aenescens. Dans les cages de plein air, de 1,6 m2, on permettait à différentes densités deM. vittaticollis et d'O. nigrofasciata de se nourrir sur des œufs deR. atimeta exposés durant deux jours.Metioche vittaticollis consommait 13 et 26 œufs aux densités respectives de 1 et 2 prédateurs par cage, mais la prédation n'était pas beaucoup plus élevée à la densité de 8. La prédation due àO. nigrofasciata n'était pas significative.
    Notes: Abstract Eight insect predators common in the rice ecosystem in the Philippines were compared in the laboratory on their ability as to feed on the eggs of green hairy caterpillar,Rivula atimeta Swinhoe. A ranking, based on feeding rates was made:Metioche vittaticollis (Stål) (Gryllidae) was the most voracious predator, followed byAnaxipha longipennis (Serville)(Gryllidae), Ophionea nigrofasciata (Schmidt-Goebel)(Carabidae), Micraspis nr.crocea (Mulsant) (Coccinellidae) andConocephalus longipennis (de Haan) (Tettigoniidae). Also the smallCyrtorhinus lividipennis Reuter (Miridae), readily fed upon the eggs.Paederus fuscipes Curtis (Staphilinidae) andCoccinella repanda (Thunberg) (Coccinellidae) fed to a very limited extent.Metioche vittaticollis andCyrtorhinus lividipennis were also tested on eggs of green semilooper,Naranga aenescens Moore, and rice whorl maggot,Hydrellia philippina Ferino. The feeding rate ofM. vittaticollis was similar on the 3 different preys, butC. lividipennis had a higher feeding rate onN. aenescens eggs. In 1.6 m2 field cages, different densities ofM. vittaticollis andO. nigrofasciata were allowed to feed on exposedR. atimeta eggs during 2 days.Metioche vittaticollis consumed 13 and 26 eggs at predator densities of 1 and 2 per cage respectively, but was not much higher at density 8. Predation byO. nigrofasciata was not significant.
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  • 9
    ISSN: 0392-6737
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Si discute lo scattering elastico di elettroni dagli atomi di cesio e xenon ad energie di collisione al di sotto dei 40 eV. Si studia l'uso del potenzialeX α con α=0.55 e si confrontano i nostri calcoli che usano questo potenziale con sezioni d'urto sperimentali. Si è trovato un ragionvole accordo con le distribuzioni angolari misurate di Gehenn e Reichert, Kleweret al., respettivamente, in contrasto con i calcoli esistenti di Fink e Yates, Walker e McCarthyet al.
    Abstract: Резюме Обсуждается упругое рассеяние электронов на атомах ксенона и цезия при энергиях ниже 40 эВ. Мы анализируем использованиеХ α-потеициала с α=0.55 и сравниваем наши вычисления, использующие этот потенциал, с экспериментальными поперечными сечениями. Получено разумное согласие с угловыми распределениями, измеренными Гехеном и Райхертом и Клевером и др., в иротивоположность существующим вычислениям Финка и Ятса, Уолкера и Маккарти и др.
    Notes: Summary The elastic scattering of electrons from caesium and xenon atoms at collision energies below 40 eV is discussed. We study the use of theX α-potential with α=0.55 and compare our calculations using this potential with experimental cross-sections. Reasonable agreement has been found with the measured angular distributions of Gehenn and Reichert and Kleweret al., respectively, in contrast to the existing calculations of Fink and Yates, Walker and McCarthyet al.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 222 (1969), S. 180-190 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The intensities of the stronger N III-transitions in the visible range of the spectrum are determined by an experimental method, insensitive to the precise knowledge of the temperature, density, and chemical composition of the plasma. By linking to known N II-values absolute N III transition probabilities are obtained. In the comparison of the two spectra LTE-relations may be used due to the opacity of the plasma in the resonance transitions of N III. The experiment is carried out in a modifiedT-tube as well as in a longer duration high current discharge and also by the photoelectric as well as by the photographic method of detection. The fair agreement of the results obtained with varied apparatus and measuring methods adds to the reliability of the results.
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