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  • 1955-1959  (303,706)
  • 1950-1954  (228,317)
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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: 2024-04-11
    Type: Thesis , NonPeerReviewed
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  • 3
    facet.materialart.
    Unknown
    In:  Beaufortia vol. 1 no. 1, pp. 1-6
    Publication Date: 2024-01-12
    Description: Compared with their New World relatives of the subfamily Cyprinodontinae, the Old World Cyprinodonts are but little known. However, some interesting accounts on Turkish species, discovered by Kosswig, S\xc3\xb6zer and Aksiray, have recently been published. Besides the species known, several new forms and species are described.\nWhile compiling an account on these fishes suitable for the home aquarium (Hoedeman & Bronner, 1950\xe2\x80\x941951), we felt some characters need reexamination, not only of Aphanius, but also of the North African genus Tellia which is said to differ from Aphanius only in the absence of ventral fins.
    Repository Name: National Museum of Natural History, Netherlands
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  • 4
    facet.materialart.
    Unknown
    In:  Beaufortia vol. 2 no. 29, pp. 1-8
    Publication Date: 2024-01-12
    Description: Material: Indochina, Tonkin, Manson Mts. 2\xe2\x80\x943000\xe2\x80\x99. April\xe2\x80\x94May. (Coll. H. FRUHSTORFER), 2 \xe2\x99\x82 \xe2\x99\x82, 1 \xe2\x99\x80.\nColour: probably somewhat faded. Head yellowish, with frons and vertex rather dark brown. Antennae yellowish, the distal part of the 6th, and the 7th joint brownish. Somites with a broad median yellowish band from collum to tail and yellowish lateral keels, the rest castaneous, slightly paler at the ventral side. Sternites and legs yellowish.
    Repository Name: National Museum of Natural History, Netherlands
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  • 5
    facet.materialart.
    Unknown
    In:  Beaufortia vol. 6 no. 70, pp. 115-145
    Publication Date: 2024-01-12
    Description: Among some coccids from Indonesia, received from Dr. L. G. E. KALSHOVEN, four large specimens were found which by their well developed ovisac showed some resemblance to Icerya purchasi MASK. After comparing the specimens with the photographs in MORRISON\xe2\x80\x99S Classification of the Margarodidae (1928) it appeared, however, that the wax covering of the body was more alike that of Walkeriana floriger (WALKER).\nThe old pinned specimens were not labelled, but Dr. KALSHOVEN remembered that they had been collected by Prof. ROEPKE on \xe2\x80\x9etjemara\xe2\x80\x9d (Casuarina). Upon inquiry Prof. ROEPKE informed me that in 1910 he had collected a giant coccid on old stems of Casuarina Junghuhniana MIQ. in the Tengger Mts. (East-Java). The specimens were found on trees near the last bend of the road leading to Tosari, a well-known health-resort at an elevation of about 1750 m, where Europeans often used to spend their holidays. Some specimens had been sent to Mr. E. E. GREEN in Ceylon who replied that it was a species of Walkeriana, but that he wanted the larvae for a description of this new species.
    Repository Name: National Museum of Natural History, Netherlands
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  • 6
    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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  • 7
    Publication Date: 2024-01-12
    Description: Le processus pr\xc3\xa9oral est court. L\xe2\x80\x99\xc5\x93il migrateur d\xc3\xa9passe le bord ant\xc3\xa9rieur de l\xe2\x80\x99\xc5\x93il fixe de plus de la moiti\xc3\xa9 de son propre diam\xc3\xa8tre. La narine exhalante z\xc3\xa9nithale est pr\xc3\xa9sente. La l\xc3\xa8vre mandibulare z\xc3\xa9nithale est hypertrophi\xc3\xa9e en un petit nombre de larges processus nullement cili\xc3\xa9s. Ko\xce\xbc\xcf\x88\xc3\xb2s, \xc3\xa9l\xc3\xa9gant; \xce\xbc\xce\xb5wia\xce\xbca, sourire.
    Repository Name: National Museum of Natural History, Netherlands
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  • 8
    Publication Date: 2024-01-12
    Description: Corophium arenarium was first described by CRAWFORD in his excellent review of the entire genus, in 1937. In the description, the author expressed his doubt already whether it might be a distinct species or merely a variety of C. volutator. CRAWFORD\xe2\x80\x99S observations on the variation of the number of spines on antenna II, segment 4 and 5, suggest that it is only a variety.\nCHEVAIS, 1937, does not give a definite opinion, whether he considers the species distinct from each other or not. For biometrical reasons, as well for reasons of variation observed by other authors, he suggests, however, that C. volutator and C. arenarium are only local races of one species.
    Repository Name: National Museum of Natural History, Netherlands
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  • 9
    facet.materialart.
    Unknown
    In:  Beaufortia vol. 7 no. 84, pp. 193-198
    Publication Date: 2024-01-12
    Description: In an adult female of the common eel Anguilla anguilla a large lipoma was found, situated on the left side, caudally of the left operculum. Microscopically, the tumour, which originated from the subcutaneous connective tissue, was composed of areas of adipose tissue and areas of fibrous connective tissue.\nThe tumour belongs to the fibrolipomatous type and shows a striking resemblance with the lipoma, described by Stolk (in press) in the lizard Lacerta muralis.
    Repository Name: National Museum of Natural History, Netherlands
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  • 10
    facet.materialart.
    Unknown
    In:  Bijdragen tot de dierkunde vol. 29 no. 1, pp. 121-171
    Publication Date: 2024-01-12
    Description: Twenty-one species of Distichopora have been described after specimens from various localities in the Indo-Pacific region, viz., D. violacea (Pallas, 1766) from \xe2\x80\x9cMare Indicum\xe2\x80\x9d, D. cinnabarina Nardo, 1844, from the Red Sea (?), D. gracilis Dana, 1848, from the Tuamotu Islands, D. coccinea Gray, 1860, from New Caledonia, D. fulvacea Michelin, 1862, from R\xc3\xa9union, D. nitida Verrill, 1864, from the Marshall Islands, D. rosea Kent, 1871, from the East coast of Australia, D. purpurea Schmeltz, 1875 (nomen nudum), from the Marshall Islands (?), D. irregularis Moseley, 1879, from the Philippine Islands, D. livida Tenison-Woods, 1879, from the Solomon Islands, D. brasseyi Wright, 1882, from the Gilbert Islands, D. allnutti Wright, 1882, from the Gilbert Islands (?), D. breviserialis Quelch, 1884, from unknown locality, D. milesii Quelch, 1884, from the Pacific (probably from the region of the Society and Tuamotu Islands), D. granulosa Quelch, 1885, from Rarotonga (?), D. conferta Quelch, 1885, from Rarotonga, D. ochracea Quelch, 1885, from the Solomon Islands, D. profunda Hickson & England, 1909, from the Chagos Archipelago, D. borealis Fisher, 1938, from the Aleutian Islands, D. fisheri Broch, 1942, from the Fiji Islands, and D. serpens Broch, 1942, from the Philippine Islands. Most of the described species came from shallow water, only three species were collected from great depths, viz., D. profunda (187\xe2\x80\x94274 m), D. borealis (518\xe2\x80\x94881 m), and D. serpens (91\xe2\x80\x94183 m). The type specimen of D. irregularis came from a depth of 10 fathoms (18 m).\nTo the species enumerated above should be added D. providentiae (Hickson & England, 1909) from off Providence Island in the Western Indian Ocean, collected at a depth of 125 fathoms (228 m). This species was originally placed in the genus Sporadopora, but the manner of arrangement of the gastropores and the dactylopores indicate that it presents at least some affinity to the genus Distichopora, and accordingly it may provisionally find a place here.
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