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  • 1
    Electronic Resource
    Electronic Resource
    Electron spin resonance and electron nuclear double resonance studies in single crystals of N-methylurea oxalic acid (2:1) (1992)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 97 (1992), S. 900-907 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Radicals trapped in a γ-irradiated single crystal of N-methylurea oxalic acid have been investigated using the techniques of electron spin resonance (ESR) and electron nuclear double resonance (ENDOR). Detailed ENDOR studies have been carried out on the two initially observed radicals. One of these radicals has been assigned to a protonated anion. Two protons, belonging to neighboring molecules, have been identified as transferred protons. The other radical is formed at the urea molecule by hydrogen abstraction from the methyl group. The observed completely transferred proton exhibits very small isotropic coupling. The third radical seen, only in aged crystals, after prolonged duration has been assigned to a R–C(overdot)HOH type of radical. These results are compared to those from the urea oxalic acid systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.463194
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  • 2
    Electronic Resource
    Electronic Resource
    A NOTE ON MAGNETIZED SPHERES (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 interpretation of total field anomalies becomes somewhat complicated, especially when an arbitrarily magnetized spherical ore mass happens to be the causative body. Even though some attempts have been made to analyze total field anomaly maps, they are often too complicated and their underlying assumptions in respect of permanent and induced components of magnetism are far from realistic. In this note, an attempt has been made to show that vertical magnetic anomalies are capable of yielding interpretation with ease and precision as far as magnetized spheres are concerned. An empirical method has been outlined for computing the magnetization inclination in the plane of the profile using the measured distances between principal maximum, principal minimum, and zero anomaly positions on a magnetic anomaly profile.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1977.tb01201.x
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  • 3
    Electronic Resource
    Electronic Resource
    Evaluation of the mutagenic potential of bacterial polychlorinated biphenyl biodegradation products (1982)
    Springer
    Archives of environmental contamination and toxicology 11 (1982), S. 577-581 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract Potential bacterial biodegradation products of polychlorobiphenyls (PCBs) were evaluated as environmental mutagens.p-Chlorophenylglyoxylic acid,p-chloromandelic acid and three monochlorinated benzoic acids were not mutagenic in either the sister chromatid exchange (SCE) orSalmonella typhimurium histidine reversion mutagenesis assays. Bacterial degradation may, therefore, tend to decrease the mutagenic potential of lesser chlorinated PCBs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01056365
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  • 4
    Electronic Resource
    Electronic Resource
    Grandient measurements in the interpretation of magnetic anomalies due to two-dimensional prism-shaped bodies (1970)
    Springer
    Pure and applied geophysics 80 (1970), S. 199-204 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary A direct method of interpreting magnetic anomalies due to two-dimensional prisms is presented here. Measurement of the first vertical derivative supplies additional information concerning the parameters. The normal ground magnetic profile, as well as the gradient profile will have symmetrical points whose distances from the origin are related to the width, depth and height of a two dimensional prism shaped body.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00880208
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  • 5
    Electronic Resource
    Electronic Resource
    A new technique of interpreting gravity and vertical magnetic anomalies due to infinite horizontal cylindrical ore bodies (1969)
    Springer
    Pure and applied geophysics 77 (1969), S. 5-10 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary A novel method of interpreting gravity and magnetic anomalies is presented here. Two diagrams of master curves, one for gravity and the other for vertical magnetic interpretation are presented. They are useful in calculating the depth of burial and the radius of infinite horizontal cylindrical bodies irrespective of density contrast or strength and direction of magnetisation. This method also enables us to infer the direction of magnetisation, resultant intensity of magnetisation and from them the susceptibility contrast; and density contrast. ThoughHenderson [8]2) reported the applicability of continuations and derivatives in the interpretation of magnetic anomalies for the first time, the authors have treated them in a more exhaustive manner in the present paper to obtain valuable relationships.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875997
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  • 6
    Electronic Resource
    Electronic Resource
    Easy method of interpreting dyke anomalies (1970)
    Springer
    Pure and applied geophysics 78 (1970), S. 32-36 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary An entirely new procedure is proposed in this paper for interpreting anomalies of dykes. This reduces the ambiguity in magnetic interpretation. Measurements of the first vertical derivative simplifies the problem of interpretation and also supplies additional information concerning the parameters of a dyke. The first vertical derivative profile cuts the distance axis at two points whose separation is related to the depth and direction of magnetisation of a dyke.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00874769
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  • 7
    Electronic Resource
    Electronic Resource
    P- andS-wave travel-time curves from andaman sea earthquakes and inferred upper mantle velocities in the bay of bengal region (1974)
    Springer
    Pure and applied geophysics 112 (1974), S. 395-402 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary P- andS-wave travel times of 56 shallow earthquakes with their epicentres in and around the Andaman Sea, as recorded by the Indian Seismological Observatories situated at Madras, Visakhapatnam, Calcutta and Port Blair, have been analysed statistically. The travel times from Δ=1 ° to 17 ° can be represented by one straight-line segment. When epicentres of all the earthquakes are considered, scatter in the travel-time data is greater and the corresponding apparentP- andS-wave velocities have been found to be 8.56±0.20 km/sec and 4.84±0.36 km/sec respectively. On the other hand, if epicentres of the narrow seismic zone situated along the western border of the Andaman Sea alone are considered, the apparentP- andS-wave velocities have been found to be 8.24±0.09 km/sec and 4.74±0.10 km/sec respectively. The O-JB residuals are found to be consistently negative for the second set of epicentres which is indicative of an inclined Mohorovicic discontinuity in the Bay of Bengal region.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00876149
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  • 8
    Electronic Resource
    Electronic Resource
    Characteristic curves for the inversion of magnetic anomalies of spherical ore bodies (1988)
    Springer
    Pure and applied geophysics 126 (1988), S. 69-83 
    Details
    ISSN: 1420-9136
    Keywords: characteristics ; magnetic anomalies ; sphere ; inversion ; interpretation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Characteristic curves are presented for interpreting vertical and total components of the anomalous magnetic field caused by spherical ore bodies. The curves use characteristic distances which are easy to measure on an anomaly profile. The method is fast, and does not require prior knowledge of the base level or the origin. Inversion with the characteristic curves is demonstrated on two field examples and the curves computed for the estimated parameters match well the field curves.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00876915
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  • 9
    Electronic Resource
    Electronic Resource
    A note on the regional variations ofP n wave velocities in the Indian-subcontinent (1974)
    Springer
    Pure and applied geophysics 112 (1974), S. 27-34 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary P-wave interval velocities between different sections in the Indian sub-continent have been calculated from data published by the India Meteorological Department, New Delhi. The interval velocities indicate the characteristics typical of shield areas. Further, since theories of continental drift and global plate tectonics are generally accepted, the present note suggests that the three structurally different unique features, namely the southern peninsular shield, the Indo-Gangetic basin and the Himalayan region are part of a continuous Gondwanic continental fragment which eventually became welded on to a proto-Eurasia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875914
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  • 10
    Electronic Resource
    Electronic Resource
    Focal mechanism study of an aftershock in the Koyna region of Maharastra State, India (1975)
    Springer
    Pure and applied geophysics 113 (1975), S. 483-488 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary In view of the conspicuous nature of the Koyna earthquake of 10 December, 1967, an attempt has been made in this paper to study the fault plane solution of an aftershock which occurred on 12 December, 1967. The resulting solution is characterized by strike-slip faulting and the inferred direction of slip vectors is consistent with that obtained for the main shock.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01592933
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