ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    2'-deoxynucleoside uronic acids from the ascidian Aplidium (= Amaroucium) fuscum (Drasche, 1883)
    Amsterdam : Elsevier
    Comparative Biochemistry and Physiology -- Part B: Biochemistry and 84 (1986), S. 11-13 
    Details
    ISSN: 0305-0491
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0305-0491(86)90263-4
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    A screening of some colonial Ascidiacea of Banyuls-sur-Mer for antibacterial and antifungal activities and, preliminarily, for natural products: 2'-deoxyribonucleosides from Trididemnum cereum (Giard, 1872)
    Amsterdam : Elsevier
    Comparative Biochemistry and Physiology -- Part B: Biochemistry and 81 (1985), S. 479-484 
    Details
    ISSN: 0305-0491
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0305-0491(85)90345-1
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Nuclear sperm basic proteins (protamines) in chitons (polyplacophora). Compositional and structural analogies with protamines of other molluscs
    Amsterdam : Elsevier
    Comparative Biochemistry and Physiology -- Part B: Biochemistry and 98 (1991), S. 437-443 
    Details
    ISSN: 0305-0491
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0305-0491(91)90237-8
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Nouveaux cyclotetrapeptides isoles de l'ascidie cystodytes delle chiajei.
    Amsterdam : Elsevier
    Tetrahedron Letters 32 (1991), S. 2609-2612 
    Details
    ISSN: 0040-4039
    Keywords: Antineoplastic ; Cyclotetrapeptides ; Didemnidae ; Marine Tunicate
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0040-4039(00)78797-1
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Etagement des algues et des invertébrés sessiles dans l'Archipel de Glénan (1973)
    Springer
    Helgoland marine research 24 (1973), S. 490-509 
    Details
    ISSN: 1438-3888
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Resume 1. Une prospection biologique de l'Archipel de Glénan a été réalisée en plongée par les auteurs jusqu'à 60 m de profondeur. Quatre peuplements distincts ont été mis en évidence et intégrés au système général d'étagement défini lors du Colloque de Gênes (Peres &Molinier 1957). La comparaison est faite avec les observations régionales effectuées en Manche (Cabioch 1968) et en Atlantique (Glemarec 1971). 2. Les deux premiers peuplements (3 et 4) constituent des horizons de l'étage infralittoral: ils sont caractérisés par des Algues, les Laminaires. Les deux derniers peuplements (5 et 7) constituent des horizons de l'étage circalittoral: ils sont caractérisés par un certain nombre d'espèces animales de forme arbusculaire. 3. L'inclinaison de la paroi rocheuse conditionnant l'éclairement, les espèces photophiles présentent une extension maximale sur les surfaces horizontales.Laminaria digitata (Linné)Lamouroux s'étend de + 1 à − 2,5 m sur les surfaces horizontales et de + 1 à − 1,5 m sur les surfaces verticales;L. hyperborea (Gunner)Foslie de 0 à − 26 m sur les surfaces horizontales et de 0 à − 10 m sur les surfaces verticales. 4. L'horizon àL. digitata s'étend de + 1 à − 6 m en horizontale (exceptionnellement − 8 m) et de + 1 à − 3 m en verticale (exceptionnellement − 5 m). 5. L'horizon àL. hyperborea s'étend de − 6 m à − 26 m en horizontale et de − 3 m à − 30 m en verticale. A partir de − 18 m ce peuplement s'appauvrit. 6. L'horizon à Axinellidae apparaît vers − 30 m. Il est caractérisé par la présence d'éponges dressées, en horizontale, et par la présence de Brachiopodes, en verticale. 7. Les Algues dressées disparaissent entre − 40 et − 47 m. 8. L'horizon àDendrophyllia cornigera (Lamarck) s'observe à − 55 − 60 m sur les surfaces horizontales (limite d'utilisation du scaphandre autonome).
    Notes: Abstract The Glénan Archipelago was investigated, from the surface to a depth of 60 m, byScuba diving. Four distinct communities (“peuplements”) have been determined that fit into the system of zonation defined by the Genoa Symposium (1957). The results are compared with observations made in the English Channel (Cabioch 1968) and in the Atlantic Ocean (Glemarec 1971). Since illumination depends upon the angle of the rocky face, photophilic species exhibit a maximum range when the rock surfaces are horizontal. The sublittoral zone is dominated by laminarians. They form two distinct communities with the animal and vegetal species they overshadow. The upper community is characterized byLaminaria digitata (Linné)Lamouroux (horizontal rocky face from 0 to 6 m; vertical rocky face from +0.5 to −3 m). The lower cummunity, characterized byL. hyperborea (Gunner)Foslie has a greater vertical extension (horizontal: −6 m to −26 m; vertical: −3 to −30 m). The circalittoral zone is colonized by several animal species growing in a ramified manner: the upper community is characterized by Axinellidae (−30 m), the lower byDendrophyllia cornigera (Lamarck) (−55 to −60 m). Upright algae disappear somewhere between −40 and −47 m.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01609537
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Formation des spicules de Didemnidae (ascidies composées). I. L'apparition des spicules chez l'oozoïde après la métamorphose (1978)
    Springer
    Marine biology 45 (1978), S. 175-184 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Conclusion L'étude de la calcification chez l'oozoïde de Trididemnum cereum (Didemnidae) a permis d'observer l'apparition des premiers spicules au niveau des organes thoraciques latéraux et la distribution progressive des spicules dans la tunique. Cette observation confirme le rôle important des OTL dans la calcification, rôle déjà signalé par Michaelsen (1919a, b), Hartmeyer (1923–1924) et Van Name (1945). L'existence d'un contact étroit entre le spicule et une cellule, visible en microscopie électronique, confirme la possibilité d'une intervention cellulaire directe dans la formation du calcaire. Cette observation concorde partiellement avec les travaux de Woodland (1907). La valeur systématique des spicules ne semble plus devoir être mise en doute. Elle ne devrait plus être rejetée à l'heure actuelle, contrairement aux opinions d'Elredge (1967) et Monniot (1970).
    Notes: Abstract The formation of the calcareous spicules of the Didemnidae has been studied in the oozooid of Trididemnum cereum (Giard, 1872). The first spicules become visible within the paired, goblet-shaped lateral organs. From there, they appear gradually throughout the entire tunic. A histological study confirmed this in vivo observation. Moreover, in the region of the lateral organs, a certain relationship between the growing spicule and one single cell is visible, both in the light and electron microscopes. In addition, electron micrographs show that the spicule is surrounded by a double-layered membrane. Therefore, it seems unlikely that the spicules of the Didemnidae owe their existence exclusively to physico-chemical processes. Thus, the systematic value of the spicules cannot be doubted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00390553
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Didemnin B : comparative study and conpormational approach in solution
    Amsterdam : Elsevier
    Tetrahedron 45 (1989), S. 181-190 
    Details
    ISSN: 0040-4020
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0040-4020(89)80045-6
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Karyotype analyses reveal inter-individual polymorphism and association of nucleolus-organizer-carrying chromosomes in Capros aper (Pisces: Zeiformes) (1992)
    Springer
    Marine biology 112 (1992), S. 37-41 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Three different karyomorphs with 2n=46, 2n=44 and 2n=42 for Capros aper (L., 1758) (Zeiformes) collected from the Gulf of Lion, near Banyuls-sur-Mer, France, in July 1990 were determined. Karyomorphs were characterized by the same arm number [Fundamental number (FN)=50], suggesting that chromosome variations are due to Robertsonian fusions. In somatic metaphase spreads stained with silver nitrate, nucleolus organizer regions (NORs) consistently occupied a terminal position on the short arms of two small submetacentric chromosomes. Ca. 30% of silver-stained metaphases in each specimen showed NOR chromosomes associated in pairs by their nucleolus organizer regions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00349725
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Les Didemnidae (Prochordata) d'Helgoland (1972)
    Springer
    Helgoland marine research 23 (1972), S. 100-116 
    Details
    ISSN: 1438-3888
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Resume 1. Deux séries de plongées à Helgoland, localité-type de la Mer du Nord, ont permis à l'auteur de récolter deux espèces de Didemnidae:Didemnum maculosum Milne Edwards, 1841 etDiplosoma migrans (Menker &Ax 1970), nouvelle combinaison des quatre espèces signalées dans la littérature concernant cette île. 2. La redescription de la première espèce conduit: (a) à séparer trois espèces confondues jusqu'ici:Didemnum maculosum Milne Edwards, 1841,Didemnum coriaceum (Von Drasche 1883) etDidemnum candidum Savigny, 1816; (b) à établir une synonymie nouvelle entreD. helgolandicum Michaelsen, 1921 etD. maculosum. 3. La description d'unDiplosoma benthique mobile, permet de penser: (a) que l'espèce mésopsammique:Arenadiplosoma migrans Menker &Ax, 1970 n'est qu'une forme dérivée de l'espèce précédente et adaptée à la vie interstitielle; (b) que ceDiplosoma benthique, mobile, avait été confondu jusqu'ici avecDiplosoma listerianum (Milne Edwards 1841).
    Notes: Abstract This paper is part of a systematic reconsideration of the family Didemnidae. Two SCUBA-diving series (October 1970, June 1971) have been carried out at the island of Helgoland (North Sea), in order to recaptureDidemnum helgolandicum Michaelsen, 1921. Two species of Didemnidae have been sampled. They represent a new combination of the four species quoted in the literature to occur near Helgoland. The first of these species,Didemnum maculosum (Milne Edwards 1841), is abundant and also present all along the french coasts.Didemnum helgolandicum Michaelsen, 1921 is synonymus with this species, whereasD. helgolandicum sensuCarlisle, 1954, represents a different species:Didemnum coriaceum (von Drasche 1883). Furthermore, it was erroneous to considerD. maculosum as synonymous withD. candidum Savigny, 1816 which is a distinct species with a different distribution. The description ofDiplosoma migrans (Menker &Ax 1970) shows that this species is mobil but normally adapted to the benthic mode of life. Up to now it had been confused withD. listerianum (Milne Edwards 1841). The mesopsammic speciesArenadiplosoma migrans differs from the benthic species only by the reduction in size of the zooids (expressing an adaptation to interstitial life). This difference does not seem sufficient to justify a separation at the specific or generic level. The mesopsammic species should be considered as a form derived from the benthic species, and adapted to interstitial life.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01616312
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    facet.materialart.
    Unknown
    Karyotype analyses reveal inter-individual polymorphism and association of nucleolus-organizer-carrying chromosomes in Capros aper (Pisces: Zeiformes) (1992)
    Springer
    Details
    Publication Date: 1992-01-01
    Print ISSN: 0025-3162
    Electronic ISSN: 1432-1793
    Topics: Biology
    Published by Springer
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...