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  • 1
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    Towards the Opening of a Magnetic Observatory at Dome C (Antarctica) (2008)
    Details
    Publication Date: 2017-04-04
    Description: The opening of a new magnetic observatory is one of the activities aimed at by the creation of a scientific base at DomeC, Antarctica (lat. 75° 06’S, long. 123° 21’E, elev. 3200m). There are many reasons supporting this objective: all Antarctic magnetic observatories providing absolute values are located along the shore and are therefore subject to coast effects and crustal field contamination. DomeC and Vostok will be so far the sole observatories free from these effects. On one hand, high latitude absolute observatories are very useful to global or regional modeling based upon satellite data, because, at high latitudes, only total field measurements can be used due to the strong influence of field aligned currents. On the other hand, the availability of magnetic data from the well distributed observatories of Terra Nova Bay (TNB), Scott Base (SBA), Dumont d’Urville (DRV), Casey (CSY) and Vostok (VOS) will provide strong support to auroral and polar cap ionosphere studies as well as asymmetry analyses between Northern and Southern hemispheres. This paper summarizes the results gathered during three summer campaigns, in 1999-2000, 2001 and 2003-2004.
    Description: Published
    Description: Kakioka Magnetic Observatory / Tsukuba Center for Institutes, Japan
    Description: 1.6. Osservazioni di geomagnetismo
    Description: 3.4. Geomagnetismo
    Description: open
    Keywords: Antarctica ; Magnetic observatory ; Dome C ; 04. Solid Earth::04.05. Geomagnetism::04.05.08. Instruments and techniques
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Conference paper
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  • 2
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    Three years continuous record of the Earth's magnetic field at Concordia Station (DomeC, Antarctica) (2010)
    Editrice Compositpri
    Details
    Publication Date: 2017-04-04
    Description: The magnetic observatory deployed at DomeC, Antarctica, in the French-Italian base known as Concordia has now been permanently running for more than three years. This paper focuses on these long-term results which are more relevant for an observatory intended to provide absolute values of the field. The problems which emerged in this fairly long record are discussed and solutions suggested to upgrade the observatory to the standards of an absolute one (i.e. Intermagnet standards).
    Description: Published
    Description: 15-26
    Description: 1.6. Osservazioni di geomagnetismo
    Description: 3.4. Geomagnetismo
    Description: JCR Journal
    Description: open
    Keywords: Antarctica ; Dome C ; magnetic observatory ; continuos records ; 04. Solid Earth::04.05. Geomagnetism::04.05.03. Global and regional models ; 04. Solid Earth::04.05. Geomagnetism::04.05.05. Main geomagnetic field ; 04. Solid Earth::04.05. Geomagnetism::04.05.08. Instruments and techniques
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 3
    Electronic Resource
    Electronic Resource
    Raman Spectroscopic Study of Aluminum Silicate Complextion in Acidic Solutions from 25 to 150°C (1999)
    Springer
    Journal of solution chemistry 28 (1999), S. 73-82 
    Details
    ISSN: 1572-8927
    Keywords: aluminum ; silica ; complexation ; Raman
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Raman spectroscopic measurements were performed on aqueous acid to neutral silica-bearing solutions (0.005 ≤ m Si ≤ 0.02, 0 ≤ pH ≤ 8) and Al–silica solutions at temperature from 20 to 150°C. At 20°C, the spectrum of silica-bearing solutions exhibits only the bands of water and a completely polarized band at 785 cm−1. This band is attributed to the ν1 band of the tetrahedral Si(OH)4 molecule. In $${\text{Si(OH)}}_{\text{4}} {\kern 1pt} {\kern 1pt} - {\kern 1pt} {\text{AlCl}}_3 {\kern 1pt} - {\kern 1pt} {\text{HCl}}$$ solutions, the intensity of this band decreases with increasing Al concentration, temperature, and pH. This decrease can be explained by the formation of an inner sphere complex between Al3+ and Si(OH)4 according to the reaction: $${\text{Al}}^{{\text{3 + }}} {\text{ + H}}_{\text{4}} {\text{SiO}}_{\text{4}}^{\text{0}} ({\text{aq}}){\text{ }} \Leftrightarrow {\text{ AlH}}_{\text{3}} {\text{SiO}}_{\text{4}}^{{\text{2 + }}} {\text{ + H}}^{\text{ + }} $$ The fraction of complexed silica deduced from raman spectroscopic measurements is in good agreement with that calculated for the similar solution compositions and temperatures using the complexation constant generated by Pokrovski et al. (23) from potentiometric measurements. At ambient temperature, the formation of aluminum silicate complex is weak and does not account for more than ca. 5 % of the total Al in most natural waters. As temperature increases, this complex becomes more significant and can dominate Al speciation in acid (pH ≤ 2) hydrothermal solutions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1021703408311
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  • 4
    Electronic Resource
    Electronic Resource
    Raman Spectroscopic Study of Aluminum Silicate Complexes at 20°C in Basic Solutions (2000)
    Springer
    Journal of solution chemistry 29 (2000), S. 1173-1186 
    Details
    ISSN: 1572-8927
    Keywords: aluminum ; silica ; complexation ; Raman spectroscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Raman spectroscopic measurements were performed at ambient temperature onaqueous silica-bearing solutions (0.005 〈 m Si 〈 0.02; 0 〈 pH 〈 14). The spectraare consistent with the formation of monomeric Si(OH)o 4, SiO(OH)− 3 andSiO2(OH)2− 2 species at acid to neutral, basic, and strongly basic pH, respectively.Raman spectra of aqueous Al-bearing solutions at basic pH confirm thepredominance of the Al(OH)− 4 species in a wide concentration range (0.01 〈 m Al 〈 0.1).Raman spectra of basic solutions (12.4 〈 pH 〈 14.3), containing both Al andSi, exhibit a strong decrease in intensities of SiO(OH)− 3, SiO2(OH)2− 2, andAl(OH)− 4 bands in comparison with Al-free Si-bearing and Si-free Al-bearingsolutions of the same metal concentration and pH, suggesting the formation ofsoluble Al—Si complexes. The amounts of complexed Al and Si derived fromthe measurements of the Al and Si band intensities in strongly basic solutions(pH ∼ 14) are consistent with the formation, between Al(OH)− 4 andSiO2(OH)2− 2, of the single Al—Si dimer SiAlO3(OH)3− 4 according to the reactionSiO2(OH)2− 2 + Al(OH)− 4 ⇔ SiAlO3(OH)3− 4 + H2OAt lower pH (∼ 12.5) the changes in band intensities are consistent with theformation of several, likely more polymerized, Al—Si complexes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026428027101
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  • 5
    Electronic Resource
    Electronic Resource
    Gastrin-like peptides in the amphibian brain: An immunohistochemical study
    Amsterdam : Elsevier
    Peptides 2 (1981), S. 99-107 
    Details
    ISSN: 0196-9781
    Keywords: Amphibian ; Brain ; CCK ; Colloidal gold ; Gastrin ; Immuno-electron microscopy ; Immunoferritin ; Immunofluorescence microscopy
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0196-9781(81)90019-X
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  • 6
    Electronic Resource
    Electronic Resource
    Immunohistochemical detection of adenohypophyseal cells containing hormones in Rana ridibunda (1982)
    Springer
    Cell & tissue research 222 (1982), S. 687-690 
    Details
    ISSN: 1432-0878
    Keywords: Pituitary hormones ; Rana ridibunda ; Immunofluorescence microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The pars distalis of the pituitary of Rana ridibunda captured throughout the spring and summer was examined with immunofluorescence techniques using antisera to mammalian pituitary hormones. On the basis of their immunoreactivity, four different cell types are recognized: 1) cells immunoreactive to anti-bovine LTH, 2) cells immunoreactive to anti-bovine STH, 3) cells immunoreactive to anti-ovine LH, and 4) cells immunoreactive to anti-synthetic ACTHβ (1–24). Their distribution and morphology as well as their staining characteristics (classical histological techniques) are reported in this study.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00213866
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  • 7
    Electronic Resource
    Electronic Resource
    Localization by immunofluorescence of a gastrin-like substance in the brain of the rainbow trout, Salmo gairdneri (1981)
    Springer
    Cell & tissue research 214 (1981), S. 247-255 
    Details
    ISSN: 1432-0878
    Keywords: Gastrin-like substance ; Teleost brain ; Hypothalamus ; Immunofluorescence microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary With the aid of an indirect immunofluorescence technique neurones containing a gastrin-like substance were identified in the brain of Salmo gairdneri. The perikarya of these neurones appear to be located along the periventricular part of the nucleus lateralis tuberis between the hypophysial stalk and the most rostral tip of the saccus vasculosus. The fibres of these perikarya run rostrally toward the hypophysis, where they can be followed in the protrusions of the neurohypophysis into the proximal pars distalis. Here the bundle of immunoreactive fibres divides into numerous smaller bundles and into single fibres. Immunohistochemical specificity tests have shown this immunoreactive substance to belong to the gastrin group, sharing an antigenic determinant with cholecystokinin (CCK) and pentagastrin (common aminoacid sequence Trp-Met-Asp-Phe). A possible function of these gastrin (or CCK)-containing neurones in the rainbow trout is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00249209
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