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  • Other Sources  (14)
  • Articles (OceanRep)  (12)
  • Bibliography on Seismology  (2)
  • Wiley  (12)
  • Inst. f. Geophys., Ruhr-Univ. Bochum
  • 1995-1999  (14)
  • 1985-1989
  • 1996  (14)
  • 1
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    Numerische Modellierung von Rißwechselwirkungen (1996)
    Inst. f. Geophys., Ruhr-Univ. Bochum
    In:  Diss., Berichte, Reihe A, Hamburg, Inst. f. Geophys., Ruhr-Univ. Bochum, vol. C 560, 183 pp., no. 49, pp. 333-342, (ISBN 3-933346-037)
    Details
    Publication Date: 1996
    Keywords: cracks and fractures (.NE. fracturing) ; Modelling ; Rock mechanics ; Fracture ; Boundary Element Method ; Griffith
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    3D-modeling, analysis and tomography of surface wave data for engineering and environmental purposes (1996)
    Inst. f. Geophys., Ruhr-Univ. Bochum
    In:  Dissertation, Berichte Reihe A, Ostende, Belgium, Inst. f. Geophys., Ruhr-Univ. Bochum, vol. 10, no. 45, pp. 44
    Details
    Publication Date: 1996
    Keywords: Three dimensional ; Modelling ; Tomography ; Surface waves ; Applied geophysics
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    BIBLIOGRAPHY SEISMOLOGY
  • 3
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    Cyathidium plantei sp. n., an extant cyrtocrinid (Echinodermata, Crinoidea)-morphologically identical to the fossil Cyathidium depressum (Cretaceous, Cenomanian) (1996)
    Wiley
    In:  Zoologica Scripta, 25 (1). pp. 77-84.
    Details
    Publication Date: 2017-07-07
    Description: A new species of the holopodid genus Cyathidium was found on rocks off Grande Comore in a depth of around 200 m. Based on external morphology of resting animals, the new species Cyathidium plantei sp. n is described, with emphasis on comparison to the only other extant species (C. foresti) as well as to the four extinct representatives of the genus. Concerning morphological characters, the new species is almost identical to the Cretaceous C. depressum. A cladistic analysis of the entire family, including the genus Holopus, shares a peculiar pattern of bending of the arms, which in principle is an apomorphic character of the family and in detail shows variations within the family. In addition, stratigraphic data are used for the determination of the evolutionary direction. This analysis reveals that the two recent species are closely related to each other, and to the fossil C. depressum. from which the entire family is probably derived.
    Type: Article , PeerReviewed
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  • 4
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    Physiological responses to phosphorus limitation in batch and steady-state cultures of Dunaliella tertiolecta (Chlorophyta): A unique stress-protein as an indicator of phosphate deficiency (1996)
    Wiley
    In:  Journal of Phycology, 32 . pp. 825-838.
    Details
    Publication Date: 2018-04-26
    Description: A protein unique to phosphorus stress observed in Dunaliella tertiolecta Butcher was studied in the context of phosphate‐limited cell physiology and is a potential diagnostic indicator of phosphate deficiency in this alga. Cells were grown over a range of limited, steady‐state growth rates and at maximum (replete) and zero (phosphate‐starved) growth rates. The stress protein, absent in nutrient‐replete cells, was produced under all steady‐state phosphate‐limited conditions and increased in abundance with increasing limitation (decreasing growth rate). Cellular carbon: phosphorus ratios and the maximum uptake rate of phosphate (Vm) increased with increasing limitation, whereas the ratio of chlorophyll a: carbon decreased. Alkaline phosphatase activity did not respond to limitation but was measurable in starved, stationary‐phase cells. Fv/Fm, a measure of photochemical efficiency, was a nonlinear, saturating function of p, as commonly observed under N limitation. The maximum Fv/Fm of 0.64 was measured in nutrient‐replete cells growing at μmax, and a value of zero was measured in stationary‐phase starved cells. When physiological parameters were compared, the P‐stress protein abundance and Fv/Fm were the most sensitive indicators of the level of deficiency. The stress protein was not produced under N‐ or Fe‐limited conditions. It is of high molecular weight (〉200) and is associated with internal cell membranes. The stress protein has several characteristics that make it a potential diagnostic indicator: it is 1) unique to phosphorus limitation (i.e. absent under all other conditions), 2) present under limiting as well as starved conditions, 3) sensitive to the level of limitation, and 4) observable without time‐course incubation of live samples.
    Type: Article , PeerReviewed
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  • 5
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    Reflection Seismic Investigations In the Volcaniclastic Apron of Gran Canaria and Implications For Its Volcanic Evolution (1996)
    Wiley
    In:  Geophysical Journal International, 125 (2). pp. 519-536.
    Details
    Publication Date: 2017-11-07
    Description: High-resolution reflection seismic data obtained around Gran Canaria allow a detailed and consistent correlation of seismic reflectors of the northern and southern Canary Basins with the lithology drilled by DSDP Leg 47A SSE of Gran Canaria, as well as with major phases of volcanic activity on Gran Canaria as mapped onshore. Two prominent reflectors were chosen as marker horizons and correlated with the drilled lithology. the results indicate that reflector R7 above the Miocene volcaniclastic debris flows V1-V3 reflects the shield-building phase of Gran Canaria. Reflector R3 is interpreted as corresponding with the Pliocene Roque Nublo formation. The top of the massive island flank of Gran Canaria, defined by seismically chaotic facies, extends 44 to 72 km off the coast of Gran Canaria. West of Gran Canaria the flank of Tenerife onlaps the steeper and older flank of Gran Canaria, which, in turn, is onlapping the older flank of Fuerteventura to the east in a similar way. Erosional channels, which can also be traced up to 50 km from the area between Gran Canaria and Fuerteventura into the deeper northern basin, have been identified in the bathymetry. The data presented provide new detailed information for modelling the submarine and subaerial evolution of the central Canary Islands of Gran Canaria and Tenerife, i.e. the timing of their shield-building phases and later stages of major volcanic activity, as reflected by the position of prominent seismic reflectors in the seismic stratigraphy.
    Type: Article , PeerReviewed
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  • 6
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    Amazonian Arthropods Respond to El Nino (1996)
    Wiley
    In:  Biotropica, 28 (3). p. 403.
    Details
    Publication Date: 2020-06-22
    Type: Article , PeerReviewed
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  • 7
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    A highly porous 3-dimensional polyphosphazene polymer matrix for skeletal tissue regeneration (1996)
    Wiley
    In:  Journal of Biomedical Materials Research, 30 (2). pp. 133-138.
    Details
    Publication Date: 2020-07-27
    Description: Current methods for the replacement of skeletal tissue in general involve the use of autografts or allografts. There are considerable drawbacks in the use of either of these tissues. In an effort to provide an alternative to traditional graft materials, a degradable 3-dimensional (3-D) osteoblast cell–polymer matrix was designed as a construct for skeletal tissue regeneration. A degradable amino acid containing polymer, poly[(methylphenoxy)(ethyl glycinato) phosphazene], was synthesized and a 3-D matrix system was prepared using a salt leaching technique. This 3-D polyphosphazene polymer matrix system, 3-D-PHOS, was then seeded with osteoblast cells for the creation of a cell–polymer matrix material. The 3-D-PHOS matrix possessed an average pore diameter of 165 μm. Environmental scanning electron microscopy revealed a reconnecting porous network throughout the polymer with an even distribution of pores over the surface of the matrix. Osteoblast cells were found attached and grew on the 3-D-PHOS at a steady rate throughout the 21-day period studied in vitro, in contrast to osteoblast growth kinetics on similar, but 2-D polyphosphazene matrices, that showed a decline in cell growth after 7 days. Characterization of 3-D-PHOS osteoblast-polymer matrices by light microscopy revealed cells growing within the pores as well as on surface of the polymer as early as day 1. This novel porous 3-D-PHOS matrix may be suitable for use as a bioerodible scaffold for regeneration of skeletal tissue.
    Type: Article , PeerReviewed
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  • 8
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    Seismic velocities of the uppermost igneous crust versus age (1996)
    Wiley
    In:  Geophysical Journal International, 124 (2). pp. 631-635.
    Details
    Publication Date: 2019-03-05
    Description: Seismic refraction velocity data from the acoustic basement (called layer 2A) have been compiled for different mid-ocean ridges. The data from post-1970 studies show a strong correlation between velocity and basement age. Importantly, velocities double in less than 10 Myr for all ridges, but for older crust, up to 160 Myr in age, velocities do not increase significantly.
    Type: Article , PeerReviewed
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  • 9
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    A preliminary study of two species of flatfish (family: Bothidae) from the south-west Atlantic (1996)
    Wiley
    In:  Journal of Fish Biology, 49 (Suppl. A). pp. 330-336.
    Details
    Publication Date: 2021-02-23
    Description: Two species of the family Bothidae (lefteye flounders), Mancopsetta maculata metadata and M. milfordi occur in the south‐west Atlantic but are caught rarely by commercial bottom trawlers. Little is therefore known about their general biology from this area. A total of 251 M. maculata and 276 M. milfordi were sampled during deep‐water exploratory fishing conducted in November 1994 within the Falkland Islands Interim and Outer Conservation Zones, at depths of 400‐1000 m, using standard commercial bottom trawling gear. The two species were found to have similar geographical distributions between 48.30′‐53.30'S and 55°‐62° W and were often obtained at the same stations in depths of 400‐900 m on the continental slope. Mancopsetta maculata maculata showed a uni‐modal cohort structure with a modal length at the 29‐cm total length size‐class. Males of M. m. maculata outnumbered females in a ratio of 3.5 : 1. Mancopsetta milfordi showed a tri‐modal length distribution, the main mode at the 37‐cm total length size‐class, with females outnumbering males in a ratio of 1.1 : 1. Length‐weight relationships and length‐at‐age information are presented for the two species. Diet was determined from the analysis of stomach contents and, although the major prey type for both species consisted of crustaceans, the morid fish Austrophycis marginata also formed an important part of the diet of M. milfordi. Key words: Mancopsetta maculata maculata; Mancopsetta milfordi; distribution; south‐west Atlantic; size; diet.
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  • 10
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    Exploratory deep-sea fishing in the Falkland Islands, south-western Atlantic (1996)
    Wiley
    In:  Journal of Fish Biology, 49 (Suppl. A). pp. 298-310.
    Details
    Publication Date: 2021-02-23
    Description: Records of demersal deep‐sea fish assemblages in waters around the Falkland Islands (Patagonian shelf area) are rare. Twenty deep‐water stations to the east and south of the Falkland Islands were sampled by commercial bottom trawl deployed in upper, middle and lower benthopelagic zones (depth range of approximately 500‐1000 m). Forty‐one species (22 families) of teleost fish were recorded, 10 species (two families) of elasmobranch and one species of agnathan. Different assemblages of fish were found to characterize each depth zone (e.g. Moridae in deeper waters, Bothidae and Rajidae in shallower waters), with diversity being greatest in the mid‐zone and biomass greatest in the upper and lower zones. Some species occurred in all zones but showed depth‐related abundance. Four species, namely the grenadiers Macrourus carinutus and Coelorhynchus fasciatus, the southern blue whiting Micromesistius australis, and the Patagonian toothfish Dissostichus eleginoides, accounted for 85% by weight of all fish caught. Quantitative sampling of selected species revealed depth‐related variations in their population structure. Length‐frequency analyses are presented for M. carinatus and D. eleginoides and show a tendency for larger individuals to inhabit deeper water. Discard rates from the commercial catch were sometimes high, particularly for the smaller species, raising concerns about the impact of a fishery on by‐catch species. The potential for deep‐sea fisheries in Falkland waters is discussed and further studies are suggested in the light of developing oil, gas and fishing industries. The presence of some invertebrate taxa is recorded.
    Type: Article , PeerReviewed
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