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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Industrial and engineering chemistry 4 (1932), S. 339-340 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0040-4020
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 5 (1949), S. 487-490 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 4 (1948), S. 351-351 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A procedure for rapid investigations of water is described. After measurement of thep H and determination of the alcalinity the cations are exchanged for H-ions in a bed of a synthetic resin exchanger. These are determined by titration with NaOH. Further data may be calculated approximately.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 6 (1950), S. 198-199 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Marine biology 6 (1970), S. 226-235 
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract An olefinic hydrocarbon (all-cis-3,6,9,12,15,18-heneicosahexaene, “HEH”)_was islated from marine planktonic plants and animals. Its structure was established by ultraviolet, infrared and mass spectrometry in combination with chemical techniques. The olefin occurs in many species of marine planktonic algae and is probably derived from the corresponding docosahexaenoic acid. Rhincalanus nasutus accumulates HEH nonselectively from its algal food together with the triglyceride lipids. Other, related copepods contain little or no HEH even when grown in cultures of algae that provide R. nasutus with that olefin. The presence of HEH in marine vertebrates suggests that, within the animal lipids, hydrocarbons are remarkably stable. This work has practical implications for studies of the marine food web and of marine pollution with persistent chemicals.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Microchimica acta 36-37 (1951), S. 1048-1055 
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary In the course of the geochemical study of sedimentary rocks, small quantities of organic compounds were isolated from fossil sea lilies(Millericrinus spec.) from the lower malm of the Bernese Jura. The following are decribed: 1) a compound of unknown structure, m. p. 120,5–121°C, possibly an aromatic hydrocarbon; 2) a highly annelated hydrocarbon, probably an alkyl derivative of 1,12-benzperylene; 3) a mixture of several, chemically closely related fossil oxyquinone dyestuffs. The stone was shown to contain microscopic small crystals; the namefringelite, from one of the places where the find was made, was proposed for the new mineral. A working hypothesis was set up regarding the origin of these compounds from echinochrome or from a related naphthoquinone dyestuff.
    Abstract: Résumé Au cours de la recherche géochimique des roches sédimentaires, on arriva à l'isolement de faibles quantités de matières organiques à partir des lys de mer fossiles(Millericrinus spec.) de la couche inférieure de la mollasse du jurassique bernois. On décrit: 1° un composé de structure inconnue PF: 120,5–121°, probablement un hydrocarbure aromatique, 2° un hydrocarbure fortement polycyclique, probablement un dérivé alcoylé du benzopérylène-1,12, 3° un mélange de plusieurs colorants oxyquinoniques fossiles chimiquement voisins. Dans la roche, de petits cristaux colorés se laissent observer microscopiquement; pour le nouveau minéral, on a créé le nom deFringelite d'après le lieu de la découverte. On a proposé une hypothèse de travail pour la filiation de ces composés à partir de l'échinochrome ou à partir d'un colorant naphtoquinonique de la même famille.
    Notes: Zusammenfassung Im Laufe der geochemischen Untersuchung von Sedimentgesteinen gelang die Isolierung geringer Mengen organischer Verbindungen aus fossilen Seelilien(Millericrinus spec.) aus dem unteren Malm des Berner Jura. Es werden beschrieben: 1. Eine Verbindung unbekannter Struktur vom Fp. 120,5 bis 121°, möglicherweise ein aromatischer Kohlenwasserstoff. 2. Ein hochannelierter Kohlenwasserstoff, wahrscheinlich ein Alkylderivat des 1,12-Benzperylens. 3. Ein Gemisch mehrerer, chemisch nahe verwandter, fossiler Oxychinonfarbstoffe. Im Gestein lassen sich mikroskopisch kleine Farbstoffkristalle feststellen; für das neue Mineral wird nach einer der Fundstellen der NameFringelit vorgeschlagen. Über die Entstehung dieser Verbindungen aus Echinochrom oder aus einem verwandten Naphthochinonfarbstoff wird eine Arbeitshypothese aufgestellt.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 8 (1952), S. 138-139 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Ti(III) and Ti(IV) form complexes, at pH values of under 2.5, with ethylene di-amino-tetra-acetate (Y−4) with the probable formula TiY− and TiY, which are reduced reversibly and independantly of pH at the dropping Hg-electrode. Temporary values are given for the dissociation constants. At higher pH values, the electrode processes are irreversible and dependant on Ph. From this fact, and from the decrease in wave height, the presence of complexes containing oxygen and numerous nuclei is concluded.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Marine biology 13 (1972), S. 137-145 
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The sea star Asterias vulgaris was observed in aquaria and in a flow tank in the presence of oysters, oyster tissue, and extracts of four shellfish species. Oysters were approached after varying delays, opened, and consumed; oyster tissue was rapidly approached and eaten. Dilute (ppb) shellfish extracts were approached in a flow tank. High concentrations of extracts elicited posturing and stomach eversion responses. Some suspended materials in flowing seawater inhibited the approach of A. vulgaris to oyster extract. The behavior of A. vulgaris and A. forbesi to food stimuli are compared. Asteroids appear to distinguish between intact and injured tissue, and exhibit variable responses. These tendencies provide a possible mechanism for forming feeding aggregates.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Marine biology 21 (1973), S. 163-172 
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Saturated and olefinic hydrocarbons were determined in additional species of benthic marine algae from the Cape Cod (Massachusetts, USA) area (see: Youngblood et al., 1971). The distribution of homologous and isomeric olefins was studied in plants of different age and in morphologically different parts of the same specimen. With two minor exceptions, only normal alkanes and alkenes are present. The methylene-interrupted C19- and C21-polyolefins are particularly abundant; Δ1-heneicosahexaene and the corresponding pentaene are common to all brown algae, while the corresponding Δ3-isomers occur in green algae. The hydrocarbon concentration, the alkene-to-alkane ratio and the polyolefin content are highest in young plants or in rapidly growing tissues of older plants. This suggests a deeper involvement in cell biochemistry of straight-chain hydrocarbons than previously considered. The biosynthesis of the plant polyolefins remains to be explored; no immediately obvious precursors of the Δ1-polyolefins were found among the algal fatty acids. The hydrocarbon composition of these benthic algae differs greatly from that of fossil fuels in its simplicity and predominately unsaturated nature. The separation of the isomers by gas chromatography and their structural elucidation by mass spectrometry, alone and in combination with hydrogenation and ozonolysis, are discussed.
    Type of Medium: Electronic Resource
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