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  • 1
    Electronic Resource
    Electronic Resource
    Shelf temperatures and reef growth on the south-east Florida coast (1979)
    [s.l.] : Nature Publishing Group
    Nature 278 (1979), S. 669-670 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] LIGHTY ET AL,1 describe a drowned Holocene Acropora palmata reef off the south-east Florida coast. In attempting to explain the lack of growth of this structure over the past 7,000yr, the authors list papers which they claim support low temperature as the principal limiting factor ("..., pronounced ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/278669c0
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  • 2
    Electronic Resource
    Electronic Resource
    The exponential extension ratio history, comparison of theory with experiment
    Amsterdam : Elsevier
    International Journal of Non-Linear Mechanics 4 (1969), S. 277-300 
    Details
    ISSN: 0020-7462
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0020-7462(69)90006-7
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  • 3
    Electronic Resource
    Electronic Resource
    Comparative study of the chemistry and structure of gorgonian and antipatharian coral skeletons (1976)
    Springer
    Marine biology 35 (1976), S. 253-267 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The comparative morphology of the axial skeleton was studied in representatives of 5 reef-dwelling gorgonian families and 2 antipatharian genera by electron and light microscopy. Comparative axial histochemistry, amino acid composition and the physico-chemical character of the protein were also studied. Evidence obtained indicates that collagen is a widespread and prominent structural feature of the gorgonian axial skeleton. Aromatic crosslinkage (sclerotization) also appears to be of widespread, if not universal occurrence in these animals. Sclerotization is equally characteristic of the black coral skeletons studied, but this material does not contain collagen. Its unusual composition, structure, and reactivity is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00396873
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  • 4
    Electronic Resource
    Electronic Resource
    Ultrastructure of the spirocyst tubule in black corals (Coelenterata: Antipatharia) and its taxonomic implications (1996)
    Springer
    Marine biology 125 (1996), S. 655-662 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Spirocyst tubules in five shallow-water antipatharian species Antipathes pennacea, Antipathes sp. cf. salix, A. fiordensis, A. galapagensis, and Cirrhipathes luetkeni contain an electron-opaque, helically arranged structure, composed of four distinct and separate bundles of microfibril-like material. Each bundle appears to be solid, rather than hollow, and is enveloped by a sheath of lesser electron-opacity that is continuous with the pleats. Tubules from a more distantly related, deep-water antipatharian, are similarly configured but are composed of only three distinct bundles, separated from one another by electron-opaque sheath material. The bundles are electron-lucent; their substructure was not preserved because this specimen was prepared for microscopy after preservation in alcohol for 27 yr, apparently without initial fixation. Most other details of the spirocyst tubule and capsule can be determined from this museum specimen. The arrangement within the tubule of multiple bundles, clearly defined by sheaths, is structurally distinct from other zoantharian spirocysts, and appears to be unique to the Antipatharia. The tubule structure of the anemone Aiptasia sp., examined for comparison, is consistent with that of spirocysts from other actiniarians and zoantharians generally, including the appearance of electron-opaque rodlets within the tubule lumen. No substructural information was obtained from Aiptasia sp. rodlets. It is unclear whether the microfibrillar bundles of antipatharian spirocysts differ from those of other zoantharians by being more amenable to resolution, or if their tubule substructure is fundamentally distinct from those of more typical zoantharians. In terms of overall structure, Aiptasia sp. spirocyst tubules contain a single bundle of rodlets without a clearly defined sheath, in contrast to antipatharians which have three or four bundles, each clearly defined. These structural differences may be useful in determining relationships both within the Antipatharia, and between antipatharians and allied orders.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00349247
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  • 5
    Electronic Resource
    Electronic Resource
    Neuromodulators of the lingual von Ebner gland: an immunocytochemical study (1991)
    Springer
    Histochemistry and cell biology 96 (1991), S. 153-156 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The serous lingual glands of von Ebner secrete lingual lipase, an enzyme that begins fat digestion in the stomach. The objective of this study was to characterize the neuromodulators in the rat tongue and von Ebner glands using immunocytochemical techniques. Rat lingual tissues were fixed in formalin, embedded in paraffin and sectioned at 4 μm for light microscopic studies. Immunocytochemical localization of neuromodulators was performed with monospecific anti-rat neuromodulator IgG or control (preimmune) IgG as the primary antibody, using the peroxidase-antiperoxidase (PAP) technique. No staining was seen with control antirat IgG. Immunospecific staining for vasoactive intestinal peptide (VIP), tyrosine hydroxylase and choline acetyltransferase (CHAT) was observed in nerves in the tongue, and cells containing immunospecific staining for serotonin (5-hydroxytryptamine) were seen in the stroma between the lingual glands. Selected cells in the serous glands stained positively for the presence of substance P and somatostatin. Adrenergic, VIP-containing and cholinergic nerves appear to innervate the tongue and serous glands. Substance P and somatostatin were identified in cells of the lingual serous glands and may be additional local modulators regulating lingual lipase release.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00315986
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  • 6
    Electronic Resource
    Electronic Resource
    Skeleton and sclerite formation in the precious red coral Corallium rubrum (1993)
    Springer
    Marine biology 117 (1993), S. 119-128 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The carbonate skeleton of the gorgonian coral Corallium rubrum (L.) is composed of both a skeletal axis and numerous sclerites scattered in the mesoglea. Studies carried out on these skeletal elements and their associated tisues using microscopy and X-ray microanalysis, suggest a close relationship between the process of sclerite formation and skeletogenesis. The skeleton is surrounded by an axial epithelium composed of a single cell type. These cells associate intimately with mesogleal sclerites and scleroblasts, incorporating them into a nascent skeleton at the branch tip. Subsequent (sub-apical) growth appears to occur solely through the agency of the axis epithelial cells that serve to physically separate mesogleal sclerites and scleroblasts from contact with the axis. The epithelium is associated with the production of layered calcite crystals and irregular protuberances that constitute the mature, calcareous skeleton. Free sclerites in the mesoglea appear to be the product of multiple cells that are cytologically indistinguishable from those in the axis epithelium. Like the axis, sclerites are produced as layers of calcite crystals with irregular protuberances. The protuberances differ only slightly from those of the axis, and the skeleton is mineralogically indistinguishable from the sclerites. Thus, the skeleton of red coral is not primarily the product of fused sclerites. Instead, we suggest that the axis epithelium treats the incipient skeleton as if it were the core of a single sclerite, and conversely, that the mesogleal scleroblasts of C. rubrum constitute a fragmented axis epithelium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00346433
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  • 7
    Electronic Resource
    Electronic Resource
    Chemical changes accompanying maturation of the connective tissue skeletons of gorgonian and antipatharian corals (1978)
    Springer
    Marine biology 49 (1978), S. 203-210 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The skeletons of 3 gorgonian and 2 antipatharian corals were subjected to quantitative chemical analysis. Protein values ranged from 70.4 to 93.6%; ash from 3.0 to 19.4%; lipid from 0 to 8.4%; carbohydrate from 1.24 to 3.94% and halogen from 4.2 to 24.9% of the dry skeletal weight. Hydroxyproline and phenolic values were 0 to 3.0% and 11.6 to 25.0% of the protein, respectively. Lipid, present in 2 gorgonian species and 1 antipatharian, significantly decreased with age in all three cases. Glucose and galactose accounted for over 90%, and sialic acids for an additional 1 to 10%, of the carbohydrate in the gorgonian skeletons studied; the glucose content of the gorgonian skeleton decreased with age. The antipatharian skeletons possessed no glucose or galactose, but contained significant levels of amino sugars; the presence of chitin is confirmed. In the gorgonians, bromine and iodine, the predominant halogens, increased with skeletal age and were present in nearly equal amounts. Small amounts of bromine were found in the antipatharian skeletons, but very large amounts of iodine were found in older parts of the skeleton. The basal regions of both antipatharian species contained 〉23% by weight of iodine, the highest content of iodine yet recorded for any organism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00391132
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  • 8
    Electronic Resource
    Electronic Resource
    Versuche zur Herstellung künstlicher Komplexantigene der Steroidreihe. 3. Mitteilung. Die Kupplung von Δ5-3β-Oxy-ätio-cholensäure-azid mit Eiweiss (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 191-197 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird die Synthese des Δ5 β-Oxy-ätio-cholensäure-azids und dessen Kupplung mit Pferde- und Kaninchenserum beschrieben. Ein entsprechendes Δ5-3-Chlor-ätio-cholensäure-derivat konnte nicht in reiner Form isoliert werden. Allgemein aber erwies sich die Azidmethode als zur Herstellung von steroidkonjugierten Proteinen gut geeignet.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19490320128
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  • 9
    Electronic Resource
    Electronic Resource
    Versuche zur Herstellung künstlicher Komplexantigene der Steroidreihe. 2. Mitteilung. Weitere Steroidester der 4-Amino-2-sulfo-benzoesäure (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 184-190 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Δ5-3-Chlor-androsten-17 β-ol und Oestradiol wurden in 17-Stellung mit 4-Nitro-2-sulfo-benzoesäure verestert. In beiden Fällen konnten die durch Reduktion der Nitrogruppe erhältlichen 4-Amino-2-sulfobenzoesäureester nicht analysenrein erhalten werden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19490320127
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  • 10
    Electronic Resource
    Electronic Resource
    Möglichkeiten zur Verbesserung der Reaktivität von ChemiefaserzellstoffHerrn Professor Dr. habil. Burkart Philipp zum 65. Geburtstag gewidmet (1990)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 41 (1990), S. 279-284 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The notion of the reactivity of dissolving pulps, which is used to explain differences in the chemical behaviour during subsequent processing to viscose, was characterized by the molecular weight distribution of cellulose, 13C-NMR investigations of the pulp, determination of the clogging value of the viscose when using reduced CS2 quantities, and distribution of the xanthate groups. Three possibilities for enhancing the reactivity of dissolving pulps are demonstrated: Pretreatment of pulp with electron-rays prior to processing of viscose, enhanced delignification of the pulp during discontinuous cooking, and energy-intensified hi-heat washing during continuous cooking permit the production of pulps having higher reactivity.
    Notes: Die Reaktivität von Chemiefaserzellstoffen, die zur Erklärung der Unterschiede im chemischen Verhalten bei der Verarbeitung zu Viskose herangezogen wird, wurde durch die Molmassenverteilung der Cellulose, durch 13C-NMR-Untersuchungen des Zellstoffs, Bestimmung des Filterwertes der Viskose bei reduziertem CS2-Einsatz und durch die Verteilung der Xanthatgruppen charakterisiert. Drei Möglichkeiten zur Erhöhung der Reaktivität des Zellstoffs werden aufgezeigt: Die Behandlung des Zellstoffs mit Elektronenstrahlen vor der Verarbeitung zu Viskose, die stärkere Delignifizierung des Zellstoffs bei der diskontinuierlichen Kochung und die energieintensivierte Hi-Heat-Wäsche.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1990.010410504
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