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  • American Physical Society  (233)
  • Springer  (163)
  • American Geophysical Union  (93)
  • International Union of Crystallography  (11)
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  • 1
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    Potential-Field Forward Modeling and Inversion Using 3D Fast Fourier Transforms (2009)
    American Geophysical Union
    Details
    Publication Date: 2017-04-04
    Description: Although 1D and 2D fast Fourier transforms (FFTs) have long been used for the filtering, interpretation, and modeling of potential-field data, 3D FFTs have not enjoyed similar popularity. This may change with the recent discovery (Caratori Tontini et al, in press, JGR) that simple 3D FFT filters can be used to transform distributions of density (or magnetization) within a box-shaped 3D volume into gravity (or magnetic) fields within the same volume.
    Description: Published
    Description: San Francisco
    Description: 3.4. Geomagnetismo
    Description: open
    Keywords: 3D Fourier transform ; Potential field ; 05. General::05.01. Computational geophysics::05.01.03. Inverse methods ; 05. General::05.01. Computational geophysics::05.01.05. Algorithms and implementation
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Poster session
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  • 2
    Electronic Resource
    Electronic Resource
    A series of laboratory exercises utilizing luxR gene of Vibrio fischeri and gfp gene of Aequoria victoria to teach the broad applications of polymerase chain reaction (2000)
    Springer
    Journal of industrial microbiology and biotechnology 24 (2000), S. 345-352 
    Details
    ISSN: 1476-5535
    Keywords: Keywords: polymerase chain reaction (PCR); lux bioluminescence; green fluorescence protein (GFP); directional cloning; fusion protein
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Three experiments are described; directional cloning of the luxR gene from the bioluminescent marine bacterium, Vibrio fischeri, directional cloning of the gfpgene from the marine jelly fish, Aequoria victoria, and the construction of a LuxR-GFP fusion protein. Experiments are presented using lux and gfp in an undergraduate biology curriculum. Journal of Industrial Microbiology & Biotechnology (2000) 24, 345–352.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/sj.jim.2900803
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  • 3
    Electronic Resource
    Electronic Resource
    Gas-solid structure differences in the donor-acceptor complex (CH3)2HN−SO2 (1996)
    Springer
    Journal of chemical crystallography 26 (1996), S. 533-538 
    Details
    ISSN: 1572-8854
    Keywords: Sulfur dioxide ; dimethylamine ; dative bond ; gas-solid structure difference ; donor — acceptor adduct ; nitrogen — sulfur bond ; Lewis acid-base complex
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The crystal structure of the donor — acceptor adduct (CH3)2HN−SO2 is reported. Crystals of the compound are clear prisms, space group Pna21; at −96°C,a=9.894(1),b=6.051(2),c=16.478(3) Å,D=1.469 g/cm3,V=786.6(5) Å,Z=8. The unit cell contains two crystallographically independent adducts, with N−S bond lengths of 2.015(3) Å and 1.991(3) Å. The average value, 2.00(1) Å is 0.33(4) Å shorter than the 2.34(3) Å value previously determined from microwave spectroscopy of the gas phase species, revealing a large medium effect on the length of the donor — acceptor bond. The structural results are compared with published data for the trimethylamine — SO2 adduct, and discussed in terms of existing experimental and theoretical results for other donor — acceptor systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01668411
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  • 4
    Electronic Resource
    Electronic Resource
    Small grains in nebulae: The case of IC 418 (1986)
    Springer
    Astrophysics and space science 122 (1986), S. 81-96 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present near infrared maps of the planetary nebula IC 418 taken at 5 arc sec spatial resolution. These show an extremely compact source structure at 1.65 μm, and very much broader and more elliptical emission distributions at 2.2 and 3.6 μm. The possibility that the near infrared continuum derives from small grains with low thermal capacity is discussed, and synthetic spectra are derived. These indicate a very much slower variation of flux with wavelength than would be deduced for grains at unitary temperature, and imply a near infrared continuum which is significantly cooler than maximum grain temperatures. Fits to the spectrum of IC 418 suggest that peak grain temperatures may approachT p0∼103 K (for εαλ−2), for instance, compared to the observed colour temperature of ∼650 K. Finally, the relevant grains are required to be refractory and, given the large C/O ratio in this nebula, probably consist of graphite. Their mass is also required to be small, and is probably of order ∼2×10−7 M ⊙. This compares with the probable total mass for large dust grains of ∼10−4 M ⊙. Although they are both small and warm, such grains would be expected to persist over the lifetime of the nebula, and may also be responsible for various NIR band emission features.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00654383
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  • 5
    Electronic Resource
    Electronic Resource
    The inception of novae transition zone oscillations (1977)
    Springer
    Astrophysics and space science 49 (1977), S. 339-348 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The nature of semi-regular oscillations in the transition zones of certain novae is discussed. It is found that hydrostatic collapse following a reduction of radiative support for the photospheric layers is a likely explanation of transition zone inception.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00641985
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  • 6
    Electronic Resource
    Electronic Resource
    β-(6-Bromopyridin-3-yl)alanine. A new plant growth regulator (1981)
    Springer
    Cellular and molecular life sciences 37 (1981), S. 715-716 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The heterocyclic amino acid, β-(6-bromopyridin-3-yl)alanine [DL-a-amino-β-(6-bromopyridin-3-yl)propanoic acid], interferes with the morphological development of the cruciferArabidopsis thaliana when incorporated in the growth medium. It appears to overcome the normal apical dominance control mechanism within the seedling, producing multirather than single-stemmed plants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01967939
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  • 7
    Electronic Resource
    Electronic Resource
    Evidence for a Magnetite-Based Navigational “Map” in Birds (1997)
    Springer
    Naturwissenschaften 84 (1997), S. 26-28 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001140050343
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  • 8
    Electronic Resource
    Electronic Resource
    Differential response of marine diatoms to solvents (1995)
    Springer
    Bulletin of environmental contamination and toxicology 54 (1995), S. 924-929 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00197980
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  • 9
    Electronic Resource
    Electronic Resource
    Cholinesterase surveillance of aerial applicators and allied workers in the Democratic Republic of the Sudan (1979)
    Springer
    Archives of environmental contamination and toxicology 8 (1979), S. 703-712 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract During the seasonal aerial application of insecticides on cotton, a cholinesterase surveillance program was realized and the adherence of the safety measures in connection with insecticides was supervised. No cases of ill health or poisoning due to the handling of the insecticides are known to have occurred amongst the pilots, entomologists, and aircraft engineers. Only a small number of ground personnel and landing strip workmen showed temporarily depressed cholinesterase levels while engaged in this program.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01054871
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  • 10
    Electronic Resource
    Electronic Resource
    Wavelength-dependent effects of light on magnetic compass orientation in Drosophila melanogaster (1993)
    Springer
    Journal of comparative physiology 172 (1993), S. 303-308 
    Details
    ISSN: 1432-1351
    Keywords: Drosophila ; Photoreception ; Magnetoreception ; Magnetic compass orientation ; Geomagnetic field
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract 1. Wildtype Oregon-R Drosophila melanogaster were trained in the ambient magnetic field to a horizontal gradient of 365 nm light emanating from one of the 4 cardinal compass directions and were subsequently tested in a visually-symmetrical, radial 8-arm maze in which the magnetic field alignment could be varied. When tested under 365 nm light, flies exhibited consistent magnetic compass orientation in the direction from which light had emanated in training. 2. When the data were analyzed by sex, males exhibited a strong and consistent magnetic compass response while females were randomly oriented with respect to the magnetic field. 3. When tested under 500 nm light of the same quantal flux, females were again randomly oriented with respect to the magnetic field, while males exhibited a 90° clockwise shift in magnetic compass orientation relative to the trained direction. 4. This wavelength-dependent shift in the direction of magnetic compass orientation suggests that Drosophila may utilize a light-dependent magnetic compass similar to that demonstrated previously in an amphibian. However, the data do not exclude the alternative hypothesis that a change in the wavelength of light has a non-specific effect on the flies' behavior, i.e., causing the flies to exhibit a different form of magnetic orientation behavior.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00216612
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