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  • 1
    Keywords: Geologie ; Mittelozeanischer Rücken ; Deep-sea ecology ; Hydrothermal vents ; Magmatism ; Mid-ocean ridges ; Sea-floor spreading ; Submarine geology
    Description / Table of Contents: Jean-Christophe Sempéré, Brian P. West, and Louis Géli: The Southeast Indian Ridge between 127° and 132°40′E: contrasts in segmentation characteristics and implications for crustal accretion / Geological Society, London, Special Publications, 118:1-15, doi:10.1144/GSL.SP.1996.118.01.01 --- Philippe Blondel: Segmentation of the Mid-Atlantic Ridge south of the Azores, based on acoustic classification of TOBI data / Geological Society, London, Special Publications, 118:17-28, doi:10.1144/GSL.SP.1996.118.01.02 --- Eddie McAllister and Johnson R. Cann: Initiation and evolution of boundary-wall faults along the Mid-Atlantic Ridge, 25–29°N / Geological Society, London, Special Publications, 118:29-48, doi:10.1144/GSL.SP.1996.118.01.03 --- Simon Allerton, Roger C. Searle, and Bramley J. Murton: Bathymetric segmentation and faulting on the Mid-Atlantic Ridge, 24°00′N to 24°40′N / Geological Society, London, Special Publications, 118:49-60, doi:10.1144/GSL.SP.1996.118.01.04 --- Kate Lawson, Roger C. Searle, Julian A. Pearce, Paul Browning, and Pamela Kempton: Detailed volcanic geology of the MARNOK area, Mid-Atlantic Ridge north of Kane transform / Geological Society, London, Special Publications, 118:61-102, doi:10.1144/GSL.SP.1996.118.01.05 --- Rodey Batiza: Magmatic segmentation of mid-ocean ridges: a review / Geological Society, London, Special Publications, 118:103-130, doi:10.1144/GSL.SP.1996.118.01.06 --- C. J. Robinson, R. S. White, M. J. Bickle, and T. A. Minshull: Restricted melting under the very slow-spreading Southwest Indian ridge / Geological Society, London, Special Publications, 118:131-141, doi:10.1144/GSL.SP.1996.118.01.07 --- Stephen J. Edwards, Trevor J. Falloon, John Malpas, and Rolf B. Pedersen: A review of the petrology of harzburgites at Hess Deep and Garrett Deep: implications for mantle processes beneath segments of the East Pacific Rise / Geological Society, London, Special Publications, 118:143-156, doi:10.1144/GSL.SP.1996.118.01.08 --- Rachel M. Haymon: The response of ridge-crest hydrothermal systems to segmented, episodic magma supply / Geological Society, London, Special Publications, 118:157-168, doi:10.1144/GSL.SP.1996.118.01.09 --- C. R. German, L. M. Parson, B. J. Murton, and H. D. Needham: Hydrothermal activity and ridge segmentation on the Mid-Atlantic Ridge: a tale of two hot-spots? / Geological Society, London, Special Publications, 118:169-184, doi:10.1144/GSL.SP.1996.118.01.10 --- C. J. MacLeod and C. E. Manning: Influence of axial segmentation on hydrothermal circulation at fast-spreading ridges: insights from Hess Deep / Geological Society, London, Special Publications, 118:185-198, doi:10.1144/GSL.SP.1996.118.01.11 --- V. V. Zaykov, V. V. Maslennikov, E. V. Zaykova, and R. J. Herrington: Hydrothermal activity and segmentation in the Magnitogorsk-West Mugodjarian zone on the margins of the Urals palaeo-ocean / Geological Society, London, Special Publications, 118:199-210, doi:10.1144/GSL.SP.1996.118.01.12 --- Eve C. Southward, Verena Tunnicliffe, Michael B. Black, David R. Dixon, and Linda R.J. Dixon: Ocean-ridge segmentation and vent tubeworms (Vestimentifera) in the NE Pacific / Geological Society, London, Special Publications, 118:211-224, doi:10.1144/GSL.SP.1996.118.01.13 --- Verena Tunnicliffe, C. Mary R. Fowler, and Andrew G. Mcarthur: Plate tectonic history and hot vent biogeography / Geological Society, London, Special Publications, 118:225-238, doi:10.1144/GSL.SP.1996.118.01.14 --- E. G. Nisbet and C. M. R. Fowler: The hydrothermal imprint on life: did heat-shock proteins, metalloproteins and photosynthesis begin around hydrothermal vents? / Geological Society, London, Special Publications, 118:239-251, doi:10.1144/GSL.SP.1996.118.01.15
    Pages: Online-Ressource (IX, 258 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 1897799721
    Language: English
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  • 2
    Keywords: Geothermik ; Hydrothermale Lagerstätte ; Hydrothermale Phase ; Hydrothermal vent ecology ; Hydrothermal vents ; Oceanografia
    Description / Table of Contents: L. M. Parson, C. L. Walker, and D. R. Dixon: Hydrothermal vents and processes / Geological Society, London, Special Publications, 87:1-2, doi:10.1144/GSL.SP.1995.087.01.01 --- C. R. German, E. T. Baker, and G. Klinkhammer: Regional setting of hydrothermal activity / Geological Society, London, Special Publications, 87:3-15, doi:10.1144/GSL.SP.1995.087.01.02 --- Sergey G. Krasnov, Irina M. Poroshina, and Georgiy A. Cherkashev: Geological setting of high-temperature hydrothermal activity and massive sulphide formation on fast- and slow-spreading ridges / Geological Society, London, Special Publications, 87:17-32, doi:10.1144/GSL.SP.1995.087.01.03 --- Bramley J. Murton, Cindy Van Dover, and Eve Southward: Geological setting and ecology of the Broken Spur hydrothermal vent field: 29°10′N on the Mid-Atlantic Ridge / Geological Society, London, Special Publications, 87:33-41, doi:10.1144/GSL.SP.1995.087.01.04 --- S. G. Krasnov, G. A. Cherkashev, T. V. Stepanova, B. N. Batuyev, A. G. Krotov, B. V. Malin, M. N. Maslov, V. F. Markov, I. M. Poroshina, M. S. Samovarov, A. M. Ashadze, L. I. Lazareva, and I. K. Ermolayev: Detailed geological studies of hydrothermal fields in the North Atlantic / Geological Society, London, Special Publications, 87:43-64, doi:10.1144/GSL.SP.1995.087.01.05 --- Edward T. Baker: Characteristics of hydrothermal discharge following a magmatic intrusion / Geological Society, London, Special Publications, 87:65-76, doi:10.1144/GSL.SP.1995.087.01.06 --- J. M. Edmond, A. C. Campbell, M. R. Palmer, G. P. Klinkhammer, C. R. German, H. N. Edmonds, H. Elderfield, G. Thompson, and P. Rona: Time series studies of vent fluids from the TAG and MARK sites (1986, 1990) Mid-Atlantic Ridge: a new solution chemistry model and a mechanism for Cu/Zn zonation in massive sulphide orebodies / Geological Society, London, Special Publications, 87:77-86, doi:10.1144/GSL.SP.1995.087.01.07 --- G. P. Klinkhammer, C. S. Chin, C. Wilson, and C. R. German: Venting from the Mid-Atlantic Ridge at 37°17′N: the Lucky Strike hydrothermal site / Geological Society, London, Special Publications, 87:87-96, doi:10.1144/GSL.SP.1995.087.01.08 --- R. H. James, H. Elderfield, M. D. Rudnicki, C. R. German, M. R. Palmer, C. Chin, M. J. Greaves, E. Gurvich, G. P. Klinkhammer, E. Ludford, R. A. Mills, J. Thomson, and A. C. Williams: Hydrothermal plumes at Broken Spur, 29°N Mid-Atlantic Ridge: chemical and physical characteristics / Geological Society, London, Special Publications, 87:97-110, doi:10.1144/GSL.SP.1995.087.01.09 --- M. R. Palmer, E. M. Ludford, C. R. German, and M. D. Lilley: Dissolved methane and hydrogen in the Steinahóll hydrothermal plume, 63°N, Reykjanes Ridge / Geological Society, London, Special Publications, 87:111-120, doi:10.1144/GSL.SP.1995.087.01.10 --- Rachel A. Mills: Hydrothermal deposits and metalliferous sediments from TAG, 26°N Mid-Atlantic Ridge / Geological Society, London, Special Publications, 87:121-132, doi:10.1144/GSL.SP.1995.087.01.11 --- F. M. Stuart, P. J. Harrop, R. Knott, A. E. Fallick, G. Turner, Y. Fouquet, and D. Rickard: Noble gas isotopes in 25 000 years of hydrothermal fluids from 13°N on the East Pacific Rise / Geological Society, London, Special Publications, 87:133-143, doi:10.1144/GSL.SP.1995.087.01.12 --- Penny Dickson, Adam Schultz, and Andrew Woods: Preliminary modelling of hydrothermal circulation within mid-ocean ridge sulphide structures / Geological Society, London, Special Publications, 87:145-157, doi:10.1144/GSL.SP.1995.087.01.13 --- A. Rachel Pascoe and Johnson R. Cann: Modelling diffuse hydrothermal flow in black smoker vent fields / Geological Society, London, Special Publications, 87:159-173, doi:10.1144/GSL.SP.1995.087.01.14 --- Rowena C. Duckworth, Richard Knott, Anthony E. Fallick, David Rickard, Bramley J. Murton, and Cindy Van Dover: Mineralogy and sulphur isotope geochemistry of the Broken Spur sulphides, 29°N, Mid-Atlantic Ridge / Geological Society, London, Special Publications, 87:175-189, doi:10.1144/GSL.SP.1995.087.01.15 --- Steven D. Scott and Raymond A. Binns: Hydrothermal processes and contrasting styles of mineralization in the western Woodlark and eastern Manus basins of the western Pacific / Geological Society, London, Special Publications, 87:191-205, doi:10.1144/GSL.SP.1995.087.01.16 --- Richard Knott, Anthony E. Fallick, David Rickard, and Harald Bäcker: Mineralogy and sulphur isotope characteristics of a massive sulphide boulder, Galapagos Rift, 85°55′W / Geological Society, London, Special Publications, 87:207-222, doi:10.1144/GSL.SP.1995.087.01.17 --- G. A. Cherkashev: Hydrothermal input into sediments of the Mid-Atlantic Ridge / Geological Society, London, Special Publications, 87:223-229, doi:10.1144/GSL.SP.1995.087.01.18 --- R. A. Hodkinson and D. S. Cronan: Hydrothermal sedimentation at ODP Sites 834 and 835 in relation to crustal evolution of the Lau Backarc Basin / Geological Society, London, Special Publications, 87:231-248, doi:10.1144/GSL.SP.1995.087.01.19 --- S. M. Sudarikov, M. P. Davydov, V. L. Bazelyan, and V. G. Tarasov: Distribution and transformation of Fe and Mn in hydrothermal plumes and sediments and the potential function of microbiocoenoses / Geological Society, London, Special Publications, 87:249-255, doi:10.1144/GSL.SP.1995.087.01.20 --- Cindy Lee van Dover: Ecology of Mid-Atlantic Ridge hydrothermal vents / Geological Society, London, Special Publications, 87:257-294, doi:10.1144/GSL.SP.1995.087.01.21 --- Bruce Shillito, Jean-Pierre Lechaire, Gérard Goffinet, and Francoise Gaill: Composition and morphogenesis of the tubes of vestimentiferan worms / Geological Society, London, Special Publications, 87:295-302, doi:10.1144/GSL.SP.1995.087.01.22 --- P. R. Dando, J. A. Hughes, and F. Thiermann: Preliminary observations on biological communities at shallow hydrothermal vents in the Aegean Sea / Geological Society, London, Special Publications, 87:303-317, doi:10.1144/GSL.SP.1995.087.01.23 --- S. M. Sudarikov and S. V. Galkin: Geochemistry of the Snake Pit vent field and its implications for vent and non-vent fauna / Geological Society, London, Special Publications, 87:319-327, doi:10.1144/GSL.SP.1995.087.01.24 --- Gareth Rieley, Cindy L. van Dover, David B. Hedrick, David C. White, and Geoffrey Eglinton: Lipid characteristics of hydrothermal vent organisms from 9°N, East Pacific Rise / Geological Society, London, Special Publications, 87:329-342, doi:10.1144/GSL.SP.1995.087.01.25 --- D. R. Dixon, D. A. S. B. Jollivet, L. R. J. Dixon, J. A. Nott, and P. W. H. Holland: The molecular identification of early life-history stages of hydrothermal vent organisms / Geological Society, London, Special Publications, 87:343-350, doi:10.1144/GSL.SP.1995.087.01.26 --- Don A. Cowan: Hyperthermophilic enzymes: biochemistry and biotechnology / Geological Society, London, Special Publications, 87:351-363, doi:10.1144/GSL.SP.1995.087.01.27 --- Christopher R. German and Martin V. Angel: Hydrothermal fluxes of metals to the oceans: a comparison with anthropogenic discharge / Geological Society, London, Special Publications, 87:365-372, doi:10.1144/GSL.SP.1995.087.01.28 --- Kevin G. Speer and Karl R. Helfrich: Hydrothermal plumes: a review of flow and fluxes / Geological Society, London, Special Publications, 87:373-385, doi:10.1144/GSL.SP.1995.087.01.29 --- Mark D. Rudnicki: Particle formation, fallout and cycling within the buoyant and non-buoyant plume above the TAG vent field / Geological Society, London, Special Publications, 87:387-396, doi:10.1144/GSL.SP.1995.087.01.30
    Pages: Online-Ressource (411 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 189779925X
    Language: English
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  • 3
    Publication Date: 2013-08-31
    Description: M82 is an irregular (Type II) galaxy located at a distance of approximately 3.5 Mpc. Its unusual appearance and high luminosity, particularly in the infrared, has led many astronomers to classify it as a starburst galaxy. This interpretation is supported by the observation of a large number of radio continuum sources within the central arcminute of the galaxy. These sources are thought to be associated with supernova remnants. The starburst in the central region of the galaxy is believed to have been triggered by tidal interaction with either M81 or the HI cloud surrounding the M81 group. High angular resolution CO-12 J=1 to 0 maps by Nakai (1984) and Lo et al. (1987) indicate the existence of a 400 to 450 pc rotating ring of molecular material about the central region of M82. Red- and blue-shifted absorption components of the HI and OH lines measured by Weliachew et al. (1984) provided the first evidence for the presence of the ring. Many astronomers, each using a different angular resolution, have compared CO-12 J=1 to 0, J=2 to 1, and J=3 to 2 emission and concluded that a large fraction of the CO emission is optically thin. Additional observations suggest that the molecular material toward the center of M82 is clumpy and dense. Unlike the lower rotational transitions of CO, CS is excited only at relatively high densities, n sub H sub 2 greater than or equal to 10(exp 4) cm(-3). It is in clouds with these densities that stars are expected to form. This makes CS an excellent probe of star formation regions. Researchers observed the CS J=2 to 1 transition (97.981 GHz) toward 52 positions in M82 using the National Radio Astronomy Observatory (NRAO) 12 m telescope.
    Keywords: ASTROPHYSICS
    Type: NASA, Ames Research Center, The Interstellar Medium in External Galaxies: Summaries of Contributed Papers; p 78-80
    Format: application/pdf
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  • 4
    Publication Date: 2019-07-12
    Description: A small map of the 1.3-mm continuum emissioin from cool dust in the central starburst region of M82 is presented. The source is found to be less than about 45 arcsecs in extent and centered on the region of brightest IR emission. The total flux density at 1.3-mm is 1.3 + or - 0.3 Jy. The molecular hydrogen mass in M82 is 3 X 10 to the 8th solar masses, with an uncertainty of + or - 30 percent. An approximate correction to masses derived from long-wavelength photometry when the heavy element abundance is different from that of the solar neighborhood is discussed. This correction reduces the derived mass of M82 to about 1 X 10 to the 8th solar masses.
    Keywords: ASTROPHYSICS
    Type: Astronomy and Astrophysics (ISSN 0004-6361); 214; 1-2
    Format: text
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  • 5
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    In:  EPIC3Biomarkers. Research and application in the assessment of environmental health, Series H: Cell Biology, Vol.68
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Inbook , peerRev
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  • 6
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Macromolecules 2 (1969), S. 419-425 
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of organic chemistry 23 (1958), S. 1422-1424 
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 37 (1965), S. 1076-1078 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
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  • 9
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract To identify sources of nutrition potentially available to the yolk-deficient embryos of the brooding brittlestar Amphipholis squamata Della Chiaje, (= Axiognathus squamata, Thomas 1966), specimens were collected intertidally at all seasons (1986 through 1987) from Odiorne Point, Rye, New Hampshire and from Appledore Island, Isles of Shoals, Maine, USA. Ultrastructural, autoradiographic and immunohistochemical studies were made of adults and brooded embryos. Adult and embryonic tissues have morphological adaptations which support healthy, symbiotic bacteria (5 to 9 x 106 colony forming units/adult brittlestar), while autoradiographic studies indicate direct uptake of labeled amino acids by eukaryotic host tissues and bacteria. Cell envelopes of subcuticular bacteria suggest that they are Gram negative and may belong in the genus Vibrio. Based on immunohistochemical localization, it appears that a single type of bacterium is present in large numbers under the cuticles of embryos and adults of A. squamata. This is the first study of the relationship between an echinoderm and a bacterium which includes isolation and immunohistochemical verification of the identity of the bacterial symbiont.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Green sea urchins, Strongylocentrotus droebachiensis OF Müller, collected off the coast of New Hampshire, USA, in late February 1995, were brought into the laboratory and fed an artificial diet ad libitum, and subjected to a photoperiod advanced by 4 months. During this study, temperatures and salinities for experimental urchins mirrored those recorded at the collection site. We examined the effects of changes in feeding regime and photoperiod on gametogenesis and compared the experimental urchins with those from the source population. During the 7-month period, experimental urchins showed no detectable changes in mean test height or diameter. Experimental urchins had a significantly higher gonad index (GI) in March, April and May (18 ± 6%) compared with field urchins in March (11 ± 3%). Subsequently, experimental urchins had a mean monthly GI of 25 to 30%, while the mean GI for field urchins was 11 to 13%. Gonial cell mitosis and gametogenesis occurred earlier in experimental male and female urchins compared with field urchins. Stereological and histological observations and stage–frequency data showed that the ovaries of experimental urchins were large because of the accelerated development of nutritive phagocytes, the volume fraction (V v) of which was 89 to 90% of the gonad, while new vitellogenic primary oocytes occupied 〈1% V v. In males, stereological and histological observations and stage–frequency data suggested a mobilization of materials from the nutritive phagocytes beginning between June and August, i.e. earlier than in females, and, by September, new gametes occupied a V v of 49 ± 3% of the testes. Oocyte size–frequency distributions demonstrated that most primary oocytes were 〈80 μm in diameter between March and September, suggesting that cold temperatures may be needed for completion of vitellogenesis. We describe changes in the two principal cell types in the germinal epithelium of urchin gonads and indicate how knowledge of their population dynamics may be useful in aquaculture applications.
    Type of Medium: Electronic Resource
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