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  • 1
    Electronic Resource
    Electronic Resource
    SCALE MODEL SEISMIC EXPERIMENTS (1956)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 4 (1956), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: An experimental arrangement is described using an electric spark as source and barium titanate as a detector. Model experiments were made in water with the source mounted above the surface. The effect on the pulse shape on transmission through the air-water interface and the change of pulse shape with depth were investigated. A number of profiles are presented of reflections from a slate slab immersed in the water with different arrangements of the model and detector.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1956.tb01414.x
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  • 2
    Electronic Resource
    Electronic Resource
    THE ROTATING CURRENT DIPOLE METHOD - A FIELD TEST (1977)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 25 (1977), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: The outputs and neutral of a three phase generator are converted to six amplitude variable phases in a 3.5 kW 400 Hz transmitter. These outputs are applied to six groundimplanted electrodes, producing a horizontally rotating current dipole in the subsurface.An investigation of the radiation pattern in the vertical magnetic field indicates, in symmetry and closure control, considerable advantages in this form of galvanic energization. These include optimization of inductive anomalies and the ability to interpret phase observations on a spatial basis in depth sounding and orebody location.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1977.tb01171.x
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  • 3
    Electronic Resource
    Electronic Resource
    Rubidium Self-oscillating Magnetometer for Earth's Field Measurements (1964)
    [s.l.] : Nature Publishing Group
    Nature 202 (1964), S. 76-76 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The instrument utilizes circularly polarized filtered rubidium light to optically pump1 a rubidium gas cell to a state of magnetization, which in turn is destroyed by the depumping effect of a radio-frequency field applied to the gas cell. The frequency of this radio-frequency field is the Larmor ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/202076a0
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Systematic Diurnal Variations in the Period and Polarization of Magnetic Micropulsations in South-west England (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 1319-1321 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Micropulsations of the PC3, PC4, and Pi2 (periods 10-150 sec) types have been detected in the rate of change of magnetic field by means of three-component inductors cored with 'Permalloy' based at, and in the vicinity of, Hartland Point, Devon. Observations during March?July 1966 were made at ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2141319a0
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  • 5
    Electronic Resource
    Electronic Resource
    In Situ Detection of an Ionospheric Electric Current (1964)
    [s.l.] : Nature Publishing Group
    Nature 204 (1964), S. 721-722 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE generally accepted basis for the explanation of the observed daily variations in the Earth's magnetic field is to be found in the dynamo theory, first postulated by Balfour Stewart in the 1882 edition of the Encyclopaedia Brifannica1. Schuster2, Chapman3 and other workers later elaborated the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/204721a0
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  • 6
    Electronic Resource
    Electronic Resource
    Comparative microstructures of natural and experimentally produced clay-bearing fault gouges (1986)
    Springer
    Pure and applied geophysics 124 (1986), S. 3-30 
    Details
    ISSN: 1420-9136
    Keywords: Structural Geology ; faults ; S. E. Spain ; experimental rock mechanics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Fault rocks formed in phyllosilicate-bearing rocks formed over a wide range of environmental conditions within the Earth's crust are characterised by similar structural and microstructural features. The most striking of these are (a) P foliation, defined by the preferred alignment of phyllosilicates in a plane oblique to the direction of shear and (b) small-scale shear zones either parallel to the shear direction (Y shears) or oblique to the direction of shear but with the opposite sense of obliquity relative to the P foliation (Riedel shears, R1). The minor shear zones have the same sense of displacement as the host shear zone. The occurrence of these and other structures in clay-rich fault gouges from exceptionally well-exposed fault zones in southeastern Spain is described. The pervasive development of these flow structures throughout large volumes of fault gouge permits fault-displacement vectors to be inferred. For the region studied the movement pictures is relatively simple and is superposed on a complex network of variably oriented fault zones. The naturally produced fault-gouge structures are compared with fault gouges produced experimentally by shearing kaolinite-quartz mixtures between intact blocks over a wide range of experimental conditions. Good correspondence between their respective microstructural features was observed. Finally, attention is drawn to the fact that natural clay-bearing fault gouges are the products of deformation accompanied by very low-grade retrogressive metamorphism, and that part of the micro-structure of these rocks may be ascribed to crystallization under stress. Microstructures are described that are from long-duration experimental runs, (5 months at high temperature and in the presence of water) which go some way towards simulating these effects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875717
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  • 7
    Electronic Resource
    Electronic Resource
    Regulation of β-chain mRNA of ovine follicle-stimulating hormone by 17β-estradiol (1983)
    Springer
    Molecular and cellular biochemistry 53-54 (1983), S. 187-195 
    Details
    ISSN: 1573-4919
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Summary 17β-Estradiol (E2) rapidly and reversibly decreases the synthesis of follicle-stimulating hormone (FSH) in primary dispersed cell cultures of ovine pituitaries. Similarly, E2 also causes a decrease in the messenger RNA for the beta subunit of ovine FSH (FSIIβ-mRNA) as measured in an in vitro translation assay. These results are consistent with the concept that E2 directly regulates either transcription of the FSHβ gene or processing of FSHβ-mRNA in sheep. Of additional interest is the observation that pituitary cultures from various species respond differently to E2 in terms of FSH synthesis. For example, E2 stimulates FSH synthesis in rat pituitary cultures, has no effect in similar rabbit cultures, and inhibits FSH synthesis in ovine cultures. Thus, a set of eukaryotic ‘mutants’ may exist to aid studies of the effect of E2 on FSH synthesis and secretion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00225253
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