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  • 1955-1959  (117,157)
  • 1957  (59,493)
  • 1956  (57,729)
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  • 1
    facet.materialart.
    Unknown
    Schweizerbart
    Publication Date: 2024-05-08
    Description: lm Zusammenhang mit den hydrographischen Untersuchungen in der Irminger See, welche im Juni 1955 auf dem Fischerei-Forschungsschiff "Anton Dohrn" ausgeführt wurden und deren Ergebnisse in der vorhergehenden Arbeit: Schichtung und Zirkulation in der Irminger See im Juni 1955 von G. Dietrich (1957) niedergelegt sind, wurden auch Untersuchungen über die Verteilung chemischer Faktoren in den verschiedenen Wassermassen angestellt. Das Gebiet der lrminger See ist gerade in dieser Beziehung von besonderem Interesse, weil, wie wir im einzelnen durch die Untersuchungen von G. Böhnecke, E. Hentschel und H. Wattenberg (1930) und G. Böhnecke, B. Føyn und H. Wattenberg (1931) wissen, hier die verschiedenen Wassermassen der Golfstrom-Ausläufer, des nordatlantischen Wassers und des Ostgrönlandstromes aufeinandertreffen und sich in einer großen Anzahl größerer und kleinerer Wirbel mitinander vermischen. Diese bewirken ihrerseits durch mit ihnen gekoppelten Hebungs- und Senkungsbewegungen eine recht verwickelte Verschiebung der Wassermassen in vertikaler Richtung. Die große Ausdehnung des befahrenen Gebietes im Verlauf der etwa 5 wöchigen Untersuchungsdauer gestattete nur, den chemischen Untersuchungen ein ganz weitmaschiges Stationsnetz zugrunde zu legen. Von den insgesamt durchgeführten 140 hydrographischen Stationen konnten daher nur 50 Stationen mit den vollen Tiefenserien chemisch bearbeitet werden. Bei der Wahl der Stationen wurde so verfahren, daß der Untersuchungsraum einigermaßen gleichmäßig durch Meßpunkte aufgeteilt wurde (Abb . 17). Auf Feinheiten im Chemismus der Wasserkörper mußte daher von vornherein verzichtet werden. Das Hauptgewicht liegt vielmehr auf der großräurnigen Verteilung und dem chemischen Aufbau der verschiedenen Wasserkörper im Untersuchungsgebiet. Untersucht wurden: der Phosphat-Gehalt, der Gehalt an gelöstem Sauerstoff sowie die Fluoreszenz und die optische Trübung in mit dem Wasserschöpfer in verschiedenen Tiefen dem Meere entnommenen Wasserproben. Der Phosphat-Gehalt wurde nach der in der Meereskunde seit langem üblichen kolorimetrischen Methode nach G. Denigès {1920) mittels Ammoniummolybdat-Schwefelsaure und Zinnchlorür (K. Kalle, 1934) an 25 ccm messenden Proben mittels des elektrischen Kolorimeters "Elko II" der Fa. C. Zeiß bestimmt. Zur Sauerstoff-Bestimmung diente die gleichfalls seit langem übliche Winkler'sche Methode an 50 ccm Meerwasserproben (K. Kalle, 1939). Die Fluoreszenzstärke wurde an 1 ccm Meerwasserproben nach der vom Verfasser entwickelten Methode (K. Kalle, 1951) mittels des Zeiß'schen Pulfrichphotometer gemessen, während für die optische Trübung der mit dem Farbfilter "S 72" (720 mμ) an 5 cm dicken Wasserschichten gewonnene Extinktionswert diente. Für diesen Zweck wurde wiederum das "Elko II"-Gerät benutzt, weil die Messung mit diesem Gerat nur 20 ccm Wasser benötigt und die Meßgenauigkeit trotz der verhältnismäßig geringen Schichtdicke extrem genau durchführbar ist (Fehlergröße = ± 0,000 2 E)1). Die Meßwerte für den Phosphat- und den Sauerstoff-Gehalt werden zusammen mit den zugehörigen Temperatur- und Salzgehaltswerten im Bulletin Hydrographique 1955 (Kopenhagen) erscheinen. Die entsprechenden Werte für die Fluoreszenzstärke und die optische Trübung sind in Zahlentafel 1 niedergelegt. An je drei Vertikalschnitten durch das Untersuchungsgebiet (A, B, C) (Abb. 1-12), deren Lage aus Abb. 17 hervorgeht, sowie an je 4 Horizontal-Schnitten in den Tiefen-Niveaus von O m, 200 m, 500 m und 1000 m (Abb. 13-16 und 18-28) soll versucht werden, die Verteilung der chemischen Faktoren im Untersuchungsgebiet in großen Zügen deutlich zu machen.
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  • 2
    Publication Date: 2024-01-12
    Description: In May 1938 I had the opportunity to observe seven living Aplysia depilans in the Zoological Station Naples. Notes on the size and colour were made and different methods of preservation were tried.\nAs one often wonders how much of the original colour pattern has been preserved in museum specimens of Aplysia, it seems important to give the result of the comparison of the living specimens as studied in 1938 and the same specimens after 18 years of preservation, in 1956. The best way of preservation appears to be killing in diluted alcohol as specimen nr. V shows.
    Repository Name: National Museum of Natural History, Netherlands
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  • 3
    facet.materialart.
    Unknown
    In:  Zoologische Verhandelingen vol. 34 no. 1, pp. 1-82
    Publication Date: 2024-01-12
    Description: CONTENTS\nIntroduction...............1\nTaxonomic studies.............3\nProvespa...............7\nVespa................10\nBionomics of Oriental and Papuan Vespinae........51\nProvespa...............51\nVespa................52\nHabitat...............52\nFood...............53\nColony foundation, castes, and periodicity.......59\nNest construction.............60\nDuration of life of colonies...........64\nAggressiveness and effect of sting.........66\nEnemies ..............69\nMimicry...............71\nDistribution of Oriental and Papuan Vespinae........72\nLiterature...............80\nIndex................83\nINTRODUCTION\nIt is now more than fifty years ago since R. du Buysson published a monograph of the genus Vespa, a group of wasps which is at present regarded as representing a subfamily consisting of four or five different genera.\nIn the collections used for the preparation of that work, the fauna of the
    Repository Name: National Museum of Natural History, Netherlands
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  • 4
    facet.materialart.
    Unknown
    In:  Zoologische Bijdragen vol. 2 no. 1, pp. 1-55
    Publication Date: 2024-01-12
    Description: INHOUD\nPag.\nI. Inleiding.................. 1\nII. Historisch overzicht............... 3\nIII. Epidemiologie en oecologie............. 13\nIV. Klinische waarnemingen, pathologie, diagnose en behandeling .... 24\nV. Aetiologie.................. 27\nVI. Scrub itch.................. 28\nVII. Preventieve maatregelen.............. 31\nVIII. Taxonomie van de Trombiculidae . ......... 36\nIX. Conclusies.................. 44\nX. Literatuur ................. 45\nI.\nINLEIDING\nGedurende de tweede wereldoorlog, in de strijd tegen Japan, hebben de geallieerde troepen in Z.O. Azi\xc3\xab en het gebied van de Z.W. Pacific kennis gemaakt met een ernstige ziekte, scrub typhus genaamd, die in korte tijd de gevechtswaarde van de troepen aanzienlijk kon verminderen. Alleen reeds in Nederlands Nieuw Guinea, waar de ziekte voor de oorlog niet bekend was, deden zich enkele duizenden gevallen voor en het totale aantal voor het gehele gebied van Nieuw Guinea en de aangrenzende eilanden is veel hoger (ongeveer 9.000). Scrub typhus volgde als belangrijke ziekte in vele gebieden direct op malaria en was bij de troepen meer gevreesd.\nMerkwaardigerwijze werden na het vertrek van de geallieerde troepen bijna geen gevallen meer gerapporteerd, tot er zich in 1953 en 1954 plotseling weer een aantal voordeden bij de op Biak en de Padaido-eilanden gelegerde
    Repository Name: National Museum of Natural History, Netherlands
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  • 5
    facet.materialart.
    Unknown
    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 8 no. 2, pp. 525-527
    Publication Date: 2024-01-12
    Description: Differt a speciebus ceteris generis Riveae habitu erecto et praesertim speciei proximae Riveae ornatae sepalis exterioribus margine piano non involute et staminibus circa medium tubi corollae insertis vel paullo inferius.\nIndo-China. Laos, prov. Vientiane, vicinity of Vientiane, c. 200 m alt., in open Dipterocarpaceae monsoon forest, on sandy lateritic soil; erect shrub, 1.50 m high; flowers white with greenish midpetaline bands, fl. Aug. 20, 1953 (rain-season); vernacular name: phi yik; Vidal 2350 (TL, type; fragments in L). A fruiting specimen from the same locality was collected Oct. 8, 1952; Vidal 1120 (TL; fragments in L).
    Repository Name: National Museum of Natural History, Netherlands
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  • 6
    facet.materialart.
    Unknown
    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 8 no. 2, pp. 452-509
    Publication Date: 2024-01-12
    Description: In the present study only those species of the genus Pouteria have been incorporated which are found in the area covered by the Flora Malesiana, as well as those of Australia and western Polynesia.\nThe results of this study could not have been obtained without the kind help of the Directors of the herbaria of Berkeley, Brisbane, Bogor, Florence, Jamaica Plain, Kew, Lae, Leiden, London, Manila, Melbourne, Paris, Singapore, Stockholm, Sydney and Z\xc3\xbcrich to whom we express our most sincere thanks.
    Repository Name: National Museum of Natural History, Netherlands
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  • 7
    facet.materialart.
    Unknown
    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 8 no. 2, pp. 446-451
    Publication Date: 2024-01-12
    Description: Trees. Leaves estipulate, alternate, scattered, simple, oblong to obovate, petiolate, tertiary nerves transverse, often numerous, always faint. Inflorescences many-florous, fasciculate on brachyblasts which are inserted in the axils of leaves or their scars, rarely in those of stout petiole-like bracts. Flowers 6(\xe2\x80\x948)-merous. Sepals 6(\xe2\x80\x948), spirally arranged or pseudo-cyclical. Corolla exsert, lobes 6(\xe2\x80\x948), as long as or longer than tube. Stamens 6(\xe2\x80\x948), inserted just or well below the corolla-throat, epipetalous. Staminodes 6(\xe2\x80\x948), episepalous, inserted in the throat. Ovary 6(\xe2\x80\x948)-celled, borne on a short stout gynophore, disk infundibuliform at apex of gynophore, more or less connate with the basal (fertile) part of the ovary, the whole (except style) hispidulous pilose, cells episepalous, ovules one in each cell, inserted in the lower half of the cells, apotropous, micropyle inferior; style short, glabrous, truncate. Fruits unknown.\nType species: Krausella forbesii (Moore) H. J. Lam.
    Repository Name: National Museum of Natural History, Netherlands
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  • 8
    facet.materialart.
    Unknown
    In:  Studies on the Fauna of Cura\xc3\xa7ao and other Caribbean Islands vol. 7 no. 1, pp. 1-260
    Publication Date: 2024-01-12
    Description: This is the second and concluding part of a report on the birds of the Netherlands Antilles, the first part dealt with the birds of St. Martin, Saba, and St. Eustatius (Studies fauna Cura\xc3\xa7ao Car. Is. 6, no. 25, 1955, p. 1-82). The present part will give a full account of the birds of Aruba, Cura\xc3\xa7ao, and Bonaire.\nAccompanied by my wife I stayed in these islands from September 22, 1951 until April 19, 1952, only interrupted by a week\xe2\x80\x99s visit to Venezuela and the period between February 1 and March 14, 1952, when we were working in St. Martin, Saba, and St. Eustatius. Our collection of birds from Aruba, Cura\xc3\xa7ao, and Bonaire comprizes 986 specimens, representing 103 species, all of which have been deposited in the Zoological Museum of Amsterdam. Although part of the collection has been prepared in the field by my wife and me, a not unimportant number of collected birds was kept in the freezing rooms of the Abattoir of the Veterinary Service in Cura\xc3\xa7ao (Parera) and Aruba (Oranjestad), from where it was shipped to Holland under deep-freezing temperatures and subsequently prepared by the taxidermists of the Zoological Museum of Amsterdam. For most valuable help in this matter of preserving our specimens, which considerably facilitated our work in the field, we are greatly indebted to Mr. J. W. M. Diemont, Director, Mr. B. A. Bitter, and other employees of the Veterinary Service of the Netherlands Antilles.
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  • 9
    facet.materialart.
    Unknown
    In:  Leidse Geologische Mededelingen vol. 22 no. 1, pp. 491-500
    Publication Date: 2024-01-12
    Description: The Devonian stratigraphy in the Valle de Ar\xc3\xa1n of the Central Pyrenees, is different from that of its surroundings.\nIn this area a zone of graded greywackes occurs together with a rock type of supposedly littoral facies, in an oblong basin, which has been filled longitudinally by sediments slipping down in turbidity currents from the delta slope in the West, thus building up the graded sediments of the deepest part of this basin.\nThe Hercynian orogeny has folded this area very strongly, developing an intense cleavage. This cleavage together with repeated alternation of sediments of different competency caused the enormous variety of secondary folds with their special tectonical problems.
    Repository Name: National Museum of Natural History, Netherlands
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  • 10
    facet.materialart.
    Unknown
    In:  Leidse Geologische Mededelingen vol. 21 no. 2, pp. 516-520
    Publication Date: 2024-01-12
    Description: Pendant les \xc3\xa9t\xc3\xa9s de 1953, 1954 et 1955, j\xe2\x80\x99ai eu l\xe2\x80\x99occasion d\xe2\x80\x99\xc3\xa9tudier une partie des Pyr\xc3\xa9n\xc3\xa9es centrales, qui se trouve au sud de St. Girons sur le bord de la zone axiale. Le terrein \xc3\xa9tudi\xc3\xa9, mesurant \xc3\xa0 peu pr\xc3\xa8s 140 km2, comprend partiellement les vall\xc3\xa9es de Bethmale, du Salat et de l\xe2\x80\x99Alet et enti\xc3\xa8rement les vall\xc3\xa9es d\xe2\x80\x99Estours et d\xe2\x80\x99Esbints.\nJe tiens \xc3\xa0 exprimer ma reconnaissance \xc3\xa0 la \xe2\x80\x9eStichting Molengraaff\xe2\x80\x9d de m\xe2\x80\x99avoir donn\xc3\xa9 une subvention qui m\xe2\x80\x99a permis d\xe2\x80\x99effectuer mon deuxi\xc3\xa8me stage sur la terrain.
    Repository Name: National Museum of Natural History, Netherlands
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