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  • 1955-1959  (59,493)
  • 1957  (59,493)
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Year
  • 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
    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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  • 3
    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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  • 4
    Publication Date: 2024-01-12
    Description: 1. In einem kleinen Material aus der Uferzone des Ohrid-See wurden 16 Arten freilebender S\xc3\xbcsswassernematoden aufgefunden ; es werden systematische Bemerkungen zu einigen Arten gemacht. Neochromadora trilineata W. SCHNEIDER, 1943 wird mit Punctodora ohridensis W. SCHNEIDER, 1943 identifiziert, die Gattung Hofmaenneria W. SCHNEIDER, 1940 wird diskutiert und es wird ein Beitrag zur Synonymie von Theristus dubius-setosus (B\xc3\x9cTSCHLI) geliefert. 2. Von den gefundenen Arten wurden 10 schon 1943 von W. SCHNEIDER aus dem Ohrid-See bekannt gemacht. Die f\xc3\xbcr den Ohrid-See neuen Arten sind : Tripyla filicaudata, Dorylaimus intermedius. Chromadorina bioculata, Ethmolaimus pratensis. Paraplectonema pedunculatum, maenneria brachystoma. 3. Der Anteil endemischer Formen an der Nematodenfauna des Ohrid-Sees ist gering. Abgesehen von Ohridia bathybia SCHNEIDER, 1943, deren Verwandtschaft und systematische Stellung unklar sind, ist allein Punctodora ohridensis W. SCHNEIDER, 1943 eine Art, die bisher ausserhalb des Ohrid-Sees nicht beobachtet worden ist.\nEs sind aus dem Ohrid-See keine Nematoden-Arten bekannt, die als marine Relikte angesprochen werden k\xc3\xb6nnten.
    Repository Name: National Museum of Natural History, Netherlands
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  • 5
    Publication Date: 2024-01-12
    Description: The result is given of a complete census of the breeding population of the White Stork (Ciconia ciconia) in the Netherlands, performed during the year 1956. The results of the census of 1950 and 1955 have been published in Beaufortia 5 (45), April 15, 1955: 23\xe2\x80\x9442, and 5 (52), March 24, 1956: 101\xe2\x80\x94115.\nThe result of the census 1956 shows a less alarming picture than that of 1955. The number of nests occupied by pairs increased to 65 (57 in 1955)\xc2\xb9). The number of young fledged increased to 95 (94). However, three newly fledged young perished in the neighbourhood of their nests, so that the ultimate breeding result of the species in 1956 is somewhat less than in 1955. The number of nests on which breeding occurred was higher than in 1955. From 65 (57) nests occupied by a pair of birds breeding occurred in 44 (36) cases. The very unfavourable weather might have influenced the relatively bad results. The storks arrived considerably later than in other years.\nNevertheless the sharp decrease which could be observed after 1950 seems to have come to a stop. The White Stork in the Netherlands lives at the border of its breeding area and population fluctuations have to be considered in this connection as far as even expecting the vanishing of the species from the Netherlands fauna at all. Everything is done at present to prevent the loss of the White Stork from this country. The Netherlands Society for the Protection of Birds has started an action for erecting new nesting sites. Well-known investigations in Bavaria have shown the density of the population to increase by this way. It has yielded some results in the Netherlands too. Six new nests have been occupied by pairs or solitary birds and on two of these nests young have been raised of which 7 fledged. In the present paper all nests are renumbered and the numbers of the 1950 census are given in parentheses. Where this number is failing the nest has been occupied after 1950 or 1955. Nests marked by + were occupied by a pair of birds but no young birds were raised. The number of young storks fledged is indicated by a figure. A summary of the results and a comparison with 1950 and 1955 is given in the tables 9, 10, and 11. The number of eggs and young storks which got lost by fighting on the nests and the number of nesting sites lost since 1950 are given on page 192.
    Repository Name: National Museum of Natural History, Netherlands
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  • 6
    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
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  • 7
    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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  • 8
    facet.materialart.
    Unknown
    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 8 no. 2, pp. 514-517
    Publication Date: 2024-01-12
    Description: The only record of Thesium in Malaysia was hitherto the Southern Chinese Thesium psilotoides Hance from medium altitudes of the Benguet and Bontoe Mountain Provinces in North Luzon, according to Merrill (Enum. Philip. Fl. Pl. 2, 1923, 115), occurring between 1200 and 1500 m. The same species has also been found in the Lesser Sunda Islands, Sumba Island, by C. N. A. de Voogd (E. Sumba, 300 m, limestone quarry, De Voogd 1873 (80, L), Dec. 1, 1934, plant pale green, fruit yellow, flower white).\nThe Sumba specimens exactly match the Philippine specimens. Species like this one, with a very short calyx tube, look astonishingly like Halorrhagis, in habit, but possess 5-merous flowers, lack bulbous-based hairs, and show a peculiarly cartilaginous leaf apex.
    Repository Name: National Museum of Natural History, Netherlands
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  • 9
    facet.materialart.
    Unknown
    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 8 no. 2, pp. 533-533
    Publication Date: 2024-01-12
    Description: These fascicles, the first part of a moss flora of Fennoscandia, comprise five (acrocarpous) orders of the Eubryales. All species and a number of forms and varieties have been included. There are clear dichotomous keys to genera and species. Of each species the original literature, the most familiar synonyms, an excellent description with critical remarks on the differences between allied species and original drawings have been given. Ecology and general distribution have been indicated, with special reference to Scandinavia. In addition there is a glossary of technical terms, which is nearly identical to that in Dixon\xe2\x80\x99s famous Student\xe2\x80\x99s Handbook of British Mosses, though less extensive.\nNevertheless it may be doubted whether this book actually fills a need in Scandinavian bryology. It is not suited for \xe2\x80\x9cworkers in all fields of botany, forestry, limnology, etc.\xe2\x80\x9d, as the author suggests, since keys to the families are lacking. Besides, there is the excellent moss flora of Brotherus, Die Laubmoose Fennoscandias, not mentioned in this connection in the preface.
    Repository Name: National Museum of Natural History, Netherlands
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  • 10
    facet.materialart.
    Unknown
    In:  Correspondentieblad ten dienste van de floristiek en het vegetatie-onderzoek van Nederland vol. 2 no. 1, pp. 15-16
    Publication Date: 2024-01-12
    Description: In ons land is Galanthus nivalis L. \xe2\x80\x9evrij algemeen, doch steeds verwilderd\xe2\x80\x9d (Bekn. Schoolflora, 8e druk). Het blijft daarbij in het midden gelaten van hoe lang geleden zulk een verwildering stamt. In sommige gevallen (De Kaagoevers; de omgeving van Leimuidon) is de situatie ter plaatse van die aard, dat men aan een zeer grijs verleden gaat denken. Het begrip verwildering zou dan nog slechts inhouden, dat de plant oorspronkelijk verwilderd is en in deze zin ware het ook van toepassing op sommige andere soorten, die men als regel niet verwilderd noemt. Werkelijke datering is bij ons weten echter nergens mogelijk en daarmee blijft het probleem onopgelost. Wij willen daarom iets meedelen over een vindplaats ten opzichte waarvan althans een vaag vermoeden van datering kan worden uitgesproken.\nIn het dorp Warmond kan men naar het Westen afslaan langs de Kloosterlaan. Even v\xc3\xb3\xc3\xb3r de plaats waar deze zich in een pad door de weilanden verliest, ligt aan de Zuidzijde van de weg een nagenoeg cirkelvormige akker, omringd door een ongewoon diepe sloot waaromheen een ringvormige met struikgewas bezette strook, die wederom door oen sloot omgeven is. Vlak hierbij stond in do late middeleeuwen het mannenklooster Marienhove. De vorm van do akker wekt overigens meer associaties met een burcht, dan met oen klooster on inderdaad werd het klooster (volgens de .gangbare beschrijvingen der Warmondse kastelen en kloosters) in 1413 gesticht \xe2\x80\x9eop een woeste of verlaate plaats, Oud-Tellingen genaamd.\xe2\x80\x9d Door sommigen wordt dit ge\xc3\xafnterpreteerd als een aanwijzing, dat, nog vroeger, het kasteel of tenminste de \xe2\x80\x9ehofstede\xe2\x80\x9d Oud-Teilingen hier stond; anderen projecteren de ligging daarvan enige honderden meters zuidelijker.
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