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  • Chromatographie, Dünnschicht  (20)
  • 79.20  (16)
  • Neurosecretion
  • Springer  (41)
  • American Geophysical Union
  • Irkutsk : Ross. Akad. Nauk, Sibirskoe Otd., Inst. Zemnoj Kory
  • Krefeld : Geologischer Dienst Nordhein-Westfalen
  • Wiley
  • 2015-2019
  • 2005-2009
  • 1975-1979  (41)
  • 1970-1974
  • 1977  (41)
Collection
Keywords
Publisher
  • Springer  (41)
  • American Geophysical Union
  • Irkutsk : Ross. Akad. Nauk, Sibirskoe Otd., Inst. Zemnoj Kory
  • Krefeld : Geologischer Dienst Nordhein-Westfalen
  • Wiley
Years
  • 2015-2019
  • 2005-2009
  • 1975-1979  (41)
  • 1970-1974
Year
  • 1
    Electronic Resource
    Electronic Resource
    Electronic conduction mechanisms of Cs- and B-implanted SiO2-films (1977)
    Springer
    Applied physics 12 (1977), S. 137-148 
    Details
    ISSN: 1432-0630
    Keywords: 71.50 ; 72.20 ; 79.20
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Thermal SiO2-films of MOS-structures have been implanted with Cs-and B-ions so that the distribution maximum was located near the center of the insulating films. The change in conduction mechanism was analysed before and after implantation and annealing at 500°C for 2h. Two major types of effects are observed: 1) Implantation generally changes the conduction mechanism from Fowler-Nordheim tunneling in pure SiO2 to the Frenkel-Poole mechanism in the implanted film for both types of ions. This effect is caused by traps due to radiation damage. 2) The second effect is dependent on the implanted type of ion. A strong increase of the current at high fields is observed after Cs-implantation while B-implantation leads to a decrease of the current at high fields. This effect is caused by field-enhanced emission and trapping of charge carriers, respectively. The local field in the implanted region is dependent on the charge state of the implanted ion. Cesium is positively and Boron is negatively charged in the oxide. After high-field stressing, a forming process occurs in the oxide which leads to high injection from the contacts. This forming process is very little dependent on the implantation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00896139
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  • 2
    Electronic Resource
    Electronic Resource
    Depth resolution in sputter profiling (1977)
    Springer
    Applied physics 13 (1977), S. 205-207 
    Details
    ISSN: 1432-0630
    Keywords: 79.20
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The dependence of depth resolution on sputter depth due to various parameters is theoretically estimated. Comparison with experimental work of different authors shows the validity of the proposed model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00882481
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  • 3
    Electronic Resource
    Electronic Resource
    3 to 15 keV Ar+ induced Auger electron emission from Si and Ar (1977)
    Springer
    Applied physics 13 (1977), S. 261-266 
    Details
    ISSN: 1432-0630
    Keywords: 79.20
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Ar+ induced Auger electrons from Si and Ar were investigated at bombardment energies between 3–15 keV and target currents of a few μA. The Auger electron yields were compared with secondary ion yields of Si and Ar by simultaneous SIMS-AES measurements. In the ion induced Auger spectra of Si five Auger peaks and in the Ar spectra three Auger peaks were observed. The ion induced Auger electron yield of Si and Ar were found to be strongly dependent upon the primary ion energy. “Bulk like” and “atomic like” Auger transitions of ion induced Auger electrons of Si were observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00882890
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  • 4
    Electronic Resource
    Electronic Resource
    Lattice location of lead implanted into silicon at room temperature (1977)
    Springer
    Applied physics 13 (1977), S. 391-393 
    Details
    ISSN: 1432-0630
    Keywords: 79.20 ; 85.30
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Rutherford backscattering has been used to measure the lattice positions occupied by Pb following room temperature implantation into silicon. The data provide information on the size and deposition of amorphous zones in relation to the distribution of implanted Pb.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00882616
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  • 5
    Electronic Resource
    Electronic Resource
    A contribution to the investigation of ion impact desorption by ion scattering (1977)
    Springer
    Applied physics 13 (1977), S. 47-49 
    Details
    ISSN: 1432-0630
    Keywords: 79.20
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Sputtering or ion impact desorption of adsorbed layers can be directly investigated by low-energy ion scattering. Because of its specific sensitivity to surface atoms, this method provides the possibility of monitoring the decrease of the signal from the adsorbate or the increase of the signal from the substrate. Both signals were studied with He+ backscattering from the system O on Ni (110). The measured desorption cross-sections and the principal implications for both ways of observation are discussed. The use of the substrate signal for the desorption study can be of major advantage, particularly in the case of light adsorbates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00890719
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  • 6
    Electronic Resource
    Electronic Resource
    Relative ion sputtering yield measurements by integration of secondary ion energy distribution using a retarding-dispersive Ion energy analyzer (1977)
    Springer
    Applied physics 14 (1977), S. 89-97 
    Details
    ISSN: 1432-0630
    Keywords: 79.20
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The application of a retarding-dispersive energy analyzer as the pre-filter of a quadrupole mass analyzer has made it possible to combine a standard high-speed Secondary Ion Mass Spectrometer (SIMS) and a high-resolution secondary-ion energy analyzer into one instrument. Data taken with this instrument indicate the presence of very significant high-energy tails in the energy distribution of all observed secondary ions, even with relatively low (2 keV) primary ion energies. The shape of the energy distribution varies widely from element to element, for atomic compared to molecular species sputtered from a clean metal surface, and depends, for a given species sputtered from a metal surface, on the degree of surface oxidation. The variations established in the present work are large enough to introduce in many cases substantial discrepancies between published values of both relative ion sputtering yields and surface elemental concentrations and values obtained by considering the complete energy distribution. Methods of obtaining accurate secondary ion yields by integrating the energy distribution are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00882637
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  • 7
    Electronic Resource
    Electronic Resource
    Study of non-radiative silicon deexcitation in an oxygen atmosphere using the differential measurement of the excited state lifetimes (1977)
    Springer
    Applied physics 14 (1977), S. 303-311 
    Details
    ISSN: 1432-0630
    Keywords: 82.65 ; 79.20 ; 34
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Having developed a new method of differential lifetime measurement using atomic ionoluminescence as an excitation process, we applied this method to a monocrystaline silicon sample in an oxygen atmosphere of variable pressure. We found decreased values of the experimental lifetimes concerning levels 4s 3 P 0 and 4s 1 P 0, which are more marked when the oxygen pressure increases. This tends then towards a saturation of the observed phenomenon. We propose, in agreement with other authors, an explanation which is based on the existence of non-radiative deexcitations. We present also a mathematical model for calculating this transition effect on the lifetime measurements. We consider that it is possible to take advantage of this experimental lifetime variation to determine a parameter of the model which characterises the non-radiative deexcitations. This measuring method appears to be a simple and original procedure for the study of certain nonradiative transitions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00882736
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  • 8
    Electronic Resource
    Electronic Resource
    On the influence of backscattered electrons on the lateral resolution in scanning auger microscopy (1977)
    Springer
    Applied physics 14 (1977), S. 351-354 
    Details
    ISSN: 1432-0630
    Keywords: 68.20 ; 79.20
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract A definition of edge resolution is proposed, which is adapted to the pecularities of scanning Auger microscopy. Based on recent monte-Carlo computer simulations for scanning electron microscopy, the influence of backscattered electrons on the edge resolution is estimated for low-Z (Al) and high-Z materials (Au). The resolution is found to be of the order of 100nm and to be nearly independent of the atomic number of the sample.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00883438
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  • 9
    Electronic Resource
    Electronic Resource
    Sputtered neutral mass spectrometry (SNMS) as a tool for chemical surface analysis and depth profiling (1977)
    Springer
    Applied physics 14 (1977), S. 43-47 
    Details
    ISSN: 1432-0630
    Keywords: 79.20 ; 82.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract An experimental system for mass spectrometry of supttered neutral particles involving a hf plasma operated in Ar at several 10−4 Torr is described. The potentialities of the method for quantitative surface analysis are reasoned. Depth profiling by sputtered neutral mass spectrometry is demonstrated for anodic oxide layers on Nb and Ta.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00882632
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  • 10
    Electronic Resource
    Electronic Resource
    ESCA studies on changes in surface composition under ion bombardment (1977)
    Springer
    Applied physics 12 (1977), S. 101-112 
    Details
    ISSN: 1432-0630
    Keywords: 79.20 ; 61.80
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The influence of ion bombardment on the composition of surfaces was investigated by means of ESCA. The bombardment of metal oxides with inert gas ions results, not only in sputtering of the surface, but also in reduction of the oxides. The rate of reduction is particularly high when the oxide/metal interface is within the range of the bombarding ions. Ion induced reduction was found in oxide layers, thinner than the escape depth of the photoelectrons, on Mo, W, Nb, Ta, Ti, Zr, Si, and Bi. The relationship between reduction phenomena, on the one hand, and the ion energy, angle of incidence, mass of the gas used for bombardment, and ion current density, on the other hand, was investigated in the case of the Mo/Mo-oxide system. Ion bombardment of surfaces may also result in the formation of new compounds. Two examples of this are the formation of carbides through the bombardment of contaminated surfaces and the ion induced formation of C-F compounds from a mixture of K2SiF6 and carbon.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00900076
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  • 11
    Electronic Resource
    Electronic Resource
    Double correlation technique (DDLTS) for the analysis of deep level profiles in semiconductors (1977)
    Springer
    Applied physics 12 (1977), S. 45-53 
    Details
    ISSN: 1432-0630
    Keywords: 06 ; 79.20 ; 73
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract A very sensitive technique is presented which can be applied to determine deep level profiles in space-charge layers of Schottky barriers orpn-junctions. The method uses an extended transient capacitance technique with correlation similar to Lang's DLTS technique. The extension of DLTS to double correlation DDLTS is necessary to resolve the deep level profile and to exclude the field dependence of the capture cross-section and contact effects. By using a double-pulse capacitance transient and correlation, these undesired effects can be subtracted. Profiles can be determined for deep levels at concentrations 104 times lower than the background doping. Results are reported for epitaxial GaAs which showed one major deep level at 0.18 eV below the conduction band. Near the interface to the substrate, a slight shift in energy from 0.18 to 0.19 eV is observed. A second level at 0.43 eV decays into the epi-layer in the form of a diffusion tail.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00900067
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  • 12
    Electronic Resource
    Electronic Resource
    Amorphous-polycrystal transition induced by laser pulse in self-ion implanted silicon (1977)
    Springer
    Applied physics 14 (1977), S. 189-191 
    Details
    ISSN: 1432-0630
    Keywords: 79.20
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Reflection high energy electron diffraction has been used to investigate the amorphous to polycrystalline structure transition in silicon induced by laser pulse. The power density of the ruby laser pulse, in the free generation mode, has been maintained below the threshold to induce surface damage. Depth analysis has been carried out in 〈100〉 silicon crystal using the channeling effect technique.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00883088
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  • 13
    Electronic Resource
    Electronic Resource
    The structure of theL 2,3 VV-auger line of silicon and silicon compounds (1977)
    Springer
    Applied physics 14 (1977), S. 283-287 
    Details
    ISSN: 1432-0630
    Keywords: 79.20
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract TheL 2,3 VV Auger transitions of Si, SiO2, and SiC have been measured and compared with the self-fold electron density of states. The data indicate that Auger matrix effects must be included to explain the structure of the Auger lines. A comparison with soft X-ray measurements of Wiech shows, that the measured Auger line shape is nearly identical with the self-foldK β emission band. The selection rules for X-ray emission lead then to the conclusion that mostlyp-like valence electrons are involved in the Auger transition. This result indicates the relative importance ofs andp states in Auger transitions which is in accordance with theoretical calculations of Feibelman et al.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00882733
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  • 14
    Electronic Resource
    Electronic Resource
    Low-energy electron diffraction and auger electron spectroscopy study of the oxidation of Ti {0001} at room temperature (1977)
    Springer
    Applied physics 12 (1977), S. 311-315 
    Details
    ISSN: 1432-0630
    Keywords: 79.20
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The reaction of a clean Ti (0001) surface with oxygen gas at low pressure and room temperature has been studied with low-energy electron diffraction (LEED) and Auger electron spectroscopy (AES). At low exposures (about 1 Langmuir) ap(2×2) superstructure is observed which gradually converts to 1×1 at high exposures (about 100 Langmuirs). The LEED spectra confirm that the final 1×1 structure is different from that of clean Ti (0001), while the AES spectra indicate that the final oxide is probably TiO, not TiO2. The plausibility of this indication is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00886031
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  • 15
    Electronic Resource
    Electronic Resource
    Some aspects of auger electron spectra of 3d transition metal oxides (1977)
    Springer
    Applied physics 13 (1977), S. 43-46 
    Details
    ISSN: 1432-0630
    Keywords: 79.20 ; 82.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Auger electron spectra of the transition metals Cr, Mn, Fe, Co and Ni as well as their oxides have been investigated in the energy range between 0–100 eV. In each case of the clean metal surface the observed spectrum consists essentially of one Auger line identified asM 2,3 VV transition. After oxidation a line doublet is observed revealing two transitions instead of one. Additional new Auger peaks appear in the low energy range between 0–30 eV. The “splitting” of the Auger line can be explained as resulting from aM 2,3 V dVd and aM 2,3 V pVp transition. The latter is characteristic for the compound and can in a simple way be interpreted as a cross transition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00890718
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  • 16
    Electronic Resource
    Electronic Resource
    Raster scanning depth profiling of layer structures (1977)
    Springer
    Applied physics 12 (1977), S. 149-156 
    Details
    ISSN: 1432-0630
    Keywords: 79.20
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Implications in the use of the electronic gating scheme in depth profiling studies of layer structures by means of raster scanning secondary ion mass spectrometry are investigated. The profile of the sputtering crater and the intensity variation after break-through are calculated with the scan width and the gate width as parameters. Thick (5.6 μm) magnetic garnet layers grown an a non-magnetic garnet substrate were used for depth profiling measurements. A relative depth resolution of 1% could be obtained. Comparison of experimental results with calculated data shows excellent agreement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00896140
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  • 17
    Electronic Resource
    Electronic Resource
    The ultrastructure of the sinus gland of Gammarus oceanicus (Crustacea: Amphipoda) (1977)
    Springer
    Cell & tissue research 182 (1977), S. 557-564 
    Details
    ISSN: 1432-0878
    Keywords: Sinus gland ; Gammarus ; Neurosecretion ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The sinus gland of Gammarus oceanicus, like that of other crustaceans, is composed of three elements: neurosecretory axons, glial cells and stromal sheath. Five neurosecretory axon types are identified on the basis of granule diameter, shape, and electron density, and axon matrix density. Exocytosis appears to be the major release mechanism of neurosecretory material. The preterminal regions of neurosecretory axons contain axoplasmic reticulum and neurotubules. Their arrangement in the axon and relationship with one another suggest a transport function. Multilamellar bodies are found in the terminal regions of neurosecretory axons. They arise from mitochondria and may be involved in granulolysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00219838
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  • 18
    Electronic Resource
    Electronic Resource
    Neurosecretion in the basommatophoran snail Bulinus truncatus (Gastropoda, Pulmonata) (1977)
    Springer
    Cell & tissue research 176 (1977), S. 57-67 
    Details
    ISSN: 1432-0878
    Keywords: Neurosecretion ; Alcian blue ; Alcian yellow staining ; Ultrastructure ; Bulinus truncatus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The neurosecretory system of the freshwater snail Bulinus truncatus was investigated. With the Alcian blue-Alcian yellow (AB/AY) staining method at least 10 different types of neurosecretory cells (NSC) were distinguished in the ganglia of the central nervous system. The differences in staining properties of the NSC — with AB/AY the cells take on different shades of green and yellow — are borne out at the ultrastructural level: the NSC types contain different types of neurosecretory elementary granules. The neurosecretory system of B. truncatus is compared to that of Lymnaea stagnalis, the species which has received the most attention among the pulmonates. It appears from the comparison that the systems of both species show many similarities, although some differences are also apparent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00220344
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  • 19
    Electronic Resource
    Electronic Resource
    Homologous neurosecretory cell groups in the land snail Achatina fulica and the sea slug Aplysia californica (1977)
    Springer
    Cell & tissue research 176 (1977), S. 109-120 
    Details
    ISSN: 1432-0878
    Keywords: Achatina fulica ; Aplysia californica ; Neurosecretion ; Homology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The right parietal ganglion of the African snail Achatina fulica contains an identifiable cluster of 20–40 white cells with somatic diameters of 80–110 μ. Cobalt chloride injection into these cells revealed an axon projection in the right parietal nerve as well as apparent terminations in the capsule. The cells contain an abundance of electron dense granules 1000–2000 Å in diameter which are formed in the Golgi apparatus. The granules stain with Gomori's chrome hematoxylin and paraldehyde fuchsin methods. While most cluster cells showed no “spontaneous” electrical activity, there was a correlation for the active cells between rate of activity and intensity of cell whiteness. These and other data suggest that the cluster cells are neurosecretory. A claim of homology with the “rostral white cells”, R3–R13, in the parieto-visceral ganglion of Aplysia is based on a similarity of morphological and electrophysiological features, together with analogous locations in the respective ganglia. It is concluded that the right parietal ganglion of Achatina is homologous with the right half of the parieto-visceral ganglion of Aplysia.
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    URL: http://dx.doi.org/10.1007/BF00220347
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  • 20
    Electronic Resource
    Electronic Resource
    Microtubules in the neurosecretory neurones of the posterior pituitary of the rat (1977)
    Springer
    Cell & tissue research 180 (1977), S. 253-261 
    Details
    ISSN: 1432-0878
    Keywords: Microtubules ; Neurohypophysis ; Neurosecretion ; Axoplasmic transport
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The microtubules in the neurosecretory neurones of the posterior pituitary were studied using different electron microscopical techniques. Tannic acid staining indicated that the microtubules had a 13 protofilament substructure similar to that described for microtubules from other tissues and organisms; the dimensions of the microtubules were also similar to that previously reported. Albumen pretreatment clearly showed the microtubules running across axonal swellings, but not continuing across the nerve endings. The only organelles showing possible association with the microtubules were small vesicles and smooth endoplasmic reticulum, no association between hormone granules and microtubules could be seen.
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    URL: http://dx.doi.org/10.1007/BF00231957
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  • 21
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    The hypothalamo-choroidal tract (1977)
    Springer
    Cell & tissue research 178 (1977), S. 129-141 
    Details
    ISSN: 1432-0878
    Keywords: Choroid plexus ; Vasopressin ; Neurosecretion ; Rat ; Electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Light and electron microscopic examination of choroid plexuses from lateral ventricles of water-deprived and subcutaneously or intravenously vasopressin administered rats reveal morphologic changes typical for vasopressin responsive fluid transporting epithelia during hormonal stimulation. Ultrastructural changes noted in both dehydrated and vasopressin treated animals included: the frequent occurrence of choroidal “dark” cells, dilatation of the lateral and basal intercellular spaces, increased vacuolization of the apical cytoplasm, and a change in microvillar conformation from the normal clavate type to those with a filiform shape. On the basis of the ultrastructural changes observed it is proposed that the choroid plexus be regarded as a target tissue for vasopressin. These findings indicated that a vasopressinmediated transchoroidal cerebrospinal fluid absorption capability exists.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00232830
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  • 22
    Electronic Resource
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    Identification of LSD and ergot alkaloids by thin-layer chromatography (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 283 (1977), S. 32-32 
    Details
    ISSN: 1618-2650
    Keywords: Nachw. von LSD, Ergot-Alkaloiden ; Chromatographie, Dünnschicht
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00439765
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  • 23
    Electronic Resource
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    Thin-layer chromatography of some ergot alkaloids (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 284 (1977), S. 47-48 
    Details
    ISSN: 1618-2650
    Keywords: Analyse von Ergotalkaloiden ; Chromatographie, Dünnschicht
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00464041
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  • 24
    Electronic Resource
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    Detection and determination of dichlorovos (DDVP) in toxicological analysis (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 285 (1977), S. 48-48 
    Details
    ISSN: 1618-2650
    Keywords: Nachw., Best. von Dichlorvos in Biolog. Material ; Chromatographie, Dünnschicht
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00446021
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  • 25
    Electronic Resource
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    Thin-layer chromatographic separation of some isomeric thiazolylbenzothiazoles (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 285 (1977), S. 255-255 
    Details
    ISSN: 1618-2650
    Keywords: Trenn. von Thiazolylbenzothiazolen ; Chromatographie, Dünnschicht ; isomere
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00453575
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    Electronic Resource
    Über chromatographische Trennungen der Seltenen Erden (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 286 (1977), S. 50-53 
    Details
    ISSN: 1618-2650
    Keywords: Trenn, von Seltenen Erden ; Chromatographie, Dünnschicht ; Verteilungsverfahren ; Tetrahydrofuran, Triphenylphosphinoxid, Paraldehyd, Di-iso-propyläther-Tetrahydrofuran
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Verteilungskonstanten von Selten-Erd-Nitraten im System Tributylphosphat-wäßrige Nitrat-Lösung werden berechnet. Dünnschicht-chromatographisch können mit Tributylphosphat in Isooctan als Laufmittel die Selten-Erd-Nitrate von La bis Gd vom Gd bis Lu getrennt werden. Eine Trennung von 13 Seltenen Erden auf einem Chromatogramm gelingt mit den Laufmitteln a) Tetrahydrofuran/Paraldehyd/Salpetersäure (20∶70∶10), b) dem Laufmittel Triphenylphosphinoxid (0,3 M in Paraldehyd) und konz. Salpetersäure im Verhältnis 90∶10, c) Di-iso-propyläther/Tetrahydrofuran/Salpetersäure (100 ∶ 60 ∶ 10). Der Trennmechanismus wird diskutiert.
    Notes: Abstract The distribution constants of the rare earth nitrates in the system tri-n-butylphosphate/aqueous nitrate solution are calculated. With thin-layer chromatography it is possible to separate the rare earth nitrates from La to Gd and from Gd to Lu in the solvent system tri-n-butylphosphate in i-octane. A separation of 13 rare earths in only one chromatogram is possible in the solvent systems a) tetrahydrofuran/paraldehyde/nitric acid (20∶70∶10), b) tri-phenylphosphinoxide (0.3 M in paraldehyde)/conc. nitric acid in the ratio 90∶10, c) di-iso-propylether/tetrahydrofuran/nitric acid (100∶60∶10). The mechanism of the separation is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00552348
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  • 27
    Electronic Resource
    Electronic Resource
    Steuergerät zur automatischen spektralphotometrischen Direktauswertung von Dünnschicht-Chromatogrammen (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 285 (1977), S. 111-120 
    Details
    ISSN: 1618-2650
    Keywords: Chromatographie, Dünnschicht ; Steuergerät zur automatischen Registrierung
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Ein Gerät zur vollautomatischen Steuerung eines DC-Spektralphotometers wurde entwickelt. Zusätzlich zur automatischen Registrierung aller Spuren eines Dünnschicht-Chromatogramms werden Remissionsminima erkannt und ihre Remissionsgrade und Ortskoordinaten ausgedruckt. Eine zweite Betriebsart ermöglicht ein manuelles Abrastern und Ausmessen eines Fleckes an jeder beliebigen Stelle der DC-Platte. Ein Rechneranschluß zur Auswertung der Meßergebnisse ist vorhanden. An Hand von Beispielen wird gezeigt, daß Reproduzierbarkeits- und Konzentrationsfehler bei der automatischen Registrierung strichförmiger Flecke wesentlich kleiner sind als bei Handpositionierung kreisförmiger Flecke. Die Linearität verschiedener Analysenfunktionen wird über 2 Zehnerpotenzen der Strichbelegung untersucht. Dabei erweist sich die Kubelka-Munk-Funktion in bezug auf Linearität allen anderen untersuchten Funktionen überlegen. Eine Kosten-Nutzen-Rechnung zeigt, daß in einem Routinelabor durch Einsatz eines Auftragegerätes und eines Steuergerätes für die automatische Registrierung trotz höherer Investitionskosten die Gesamtkosten einer Analyse um 70% gesenkt werden können.
    Notes: Abstract An instrument has been constructed for the automatic control of a TLC spectrophotometer. In addition to the automatic scanning of all tracks of a thin-layer chromatogram the positions and values of diffuse reflectance minima are recognized and printed. A second mode allows the manual scanning and measurement of a spot at any position on the TLC plate. A digital output is provided for the evaluation of the results with a computer. The errors of reproducibility and of concentration are much smaller using the automatic scanning of bands than using the manual positioning of circular spots as the examples show. The linearity of several analytical functions is analysed within two decades of concentration. The Kubelka-Munk function was found to be superior in linearity to all other functions studied. Calculations of costs show, that the total costs of an analysis in a routine laboratory can be lowered to an extend of about 70% by the use of an application instrument and a controlling instrument for automatic scanning inspite of the higher costs of investments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00573709
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  • 28
    Electronic Resource
    Electronic Resource
    TLC Separation of potential antifertility agents: N-aryl-N′-2(p-methoxybenzoylbenzofuranyl)thiosemicarbazones (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 285 (1977), S. 270-270 
    Details
    ISSN: 1618-2650
    Keywords: Trenn. von Aryl-p-methoxybenzoylbenzofuranyl-thiosemicarbazonen, Contraceptiva ; Chromatographie, Dünnschicht
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00453591
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  • 29
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    Dünnschicht-chromatographischer Nachweis herbicider Verbindungen durch Dansylierung (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 286 (1977), S. 95-99 
    Details
    ISSN: 1618-2650
    Keywords: Nachw. von Herbiciden ; Chromatographie, Dünnschicht ; Dansylierung
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Reaktion von Dansylchlorid mit verschiedenen Herbiciden und Derivaten, die Aminogruppen enthalten oder zu Anilinen hydrolysierbar sind, wird beschrieben. Auf der Dünnschichtplatte lassen sich die fluorescierenden Stoffe gut trennen und identifizieren, was anhand von schematischen Darstellungen der Dünnschicht-Chromatogramme gezeigt wird.
    Notes: Abstract The reaction of dansyl chloride with various herbicides and derivatives containing amino groups or hydrolyzable to anilines is described. On TLC plates the fluorescent substances can be readily separated and identified as shown by diagrammatic representation of the thin-layer chromatograms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00552357
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    Electronic Resource
    TLC separation of closely related diols (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 286 (1977), S. 247-247 
    Details
    ISSN: 1618-2650
    Keywords: Trenn. von Diolen ; Chromatographie, Dünnschicht
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01155598
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  • 31
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    Rapid TLC separation of some closely related coupled products ofβ-ketoester with aryldiazonium chlorides (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 286 (1977), S. 248-248 
    Details
    ISSN: 1618-2650
    Keywords: Trenn. von Ketoester-Kupplungsprodukten ; Chromatographie, Dünnschicht ; Aryldiazoniumchloride
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01155600
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  • 32
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    TLC separation of some 4-phenyl substituted thiosemicarbazides (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 286 (1977), S. 249-249 
    Details
    ISSN: 1618-2650
    Keywords: Trenn. von Thiosemicarbaziden ; Chromatographie, Dünnschicht ; 4-phenyl-substituiert
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01155602
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    Electronic Resource
    TLC separation of 5,5-dimethylcyclohexane-2-arylhydrazono-1,2,3-triones (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 286 (1977), S. 250-250 
    Details
    ISSN: 1618-2650
    Keywords: Trenn. von 5,5-Dimethylcyclohexan-2-arylhydrazon-1,2,3-trionen ; Chromatographie, Dünnschicht
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01155604
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    TLC separation of some inorganic ions on EDTA impregnated plates. II (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 286 (1977), S. 255-255 
    Details
    ISSN: 1618-2650
    Keywords: Trenn. von Kationen ; Chromatographie, Dünnschicht ; ÄDTA-imprägn. Platten
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01155611
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  • 35
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    Electronic Resource
    TLC separation of potential antithyroid agents: N-aryl-N′-2(benzimidazolyl)thiocarbamides (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 286 (1977), S. 254-254 
    Details
    ISSN: 1618-2650
    Keywords: Trenn. von Arylbenzimidazolyl-thiocarbamiden, Antithyroide Mittel ; Chromatographie, Dünnschicht
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01155610
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  • 36
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    Electronic Resource
    Dünnschicht-chromatographische Routinebestimmung von Benz(a)pyren im Schwebstaub mit „in situ“-Auswertung (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 287 (1977), S. 264-270 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Benzpyren in Schwebstaub ; Chromatographie, Dünnschicht ; Routinemethode
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es wird ein Verfahren zur dünnschicht-chromatographischen Bestimmung von Benz(a)pyren im Schwebstaub beschrieben, bei dem nach Extraktion mit Cyclohexan im Ultraschallbad die Trennung eindimensional auf Celluloseacetat-Folien nacheinander mit den Laufmitteln 95%ig. Äthanol/Dichlormethan (8∶2) und Pyridin/Methanol/Wasser (3∶5∶2) durchgeführt wird. Die Auswertung erfolgt fluorimetrisch direkt auf der Platte. Das Verfahren, das eine sichere Abtrennung des Benz(a)pyrens von Benz(k)fluoranthen und Anthanthren erlaubt, ist für die Bestimmung von 0,4–20 ng Benz(a)pyren/m3 Luft bei 24stündiger Probenahme mit einem „High Volume Air Sampler“ geeignet. Eine Erweiterung des Arbeitsbereiches nach oben und unten ist möglich. Der Gesamtzeitbedarf für die Analyse von drei Filterproben beträgt rund 5 h, von denen etwa 3 h auf die chromatographische Entwicklung entfallen.
    Notes: Summary A method is described for the thin-layer chromatographic determination of benzo(a)pyrene in suspended particulate matter, including the ultrasonic extraction with cyclohexane and the separation on cellulose acetate thin-layer foils by subsequent development in one direction with 95% ethanol-dichloromethane (8∶2) and pyridine-methanol-water (3∶5∶2). The quantitative evaluation is carried out by fluorimetric scanning of the plate. The method permits a reliable separation of benzo(a)pyrene from benzo(k)fluoranthene and anthanthrene and is suited for the determination of 0.4–20 ng of benzo(a)pyrene/m3 of air, if sampling is done with a High Volume Air Sampler during 24 h. The total time necessary to analyze three filters is about 5 h, wherein the chromatographic development takes 3 h.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00634497
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    Zur Analytik der Xanthen-Derivate (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 287 (1977), S. 312-313 
    Details
    ISSN: 1618-2650
    Keywords: Trenn. von Bixanthenen ; Chromatographie, Dünnschicht ; Mikrobestimmung
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00634507
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  • 38
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    T.L.C. Separation of some closely related potential antidiabetic N′-carbamyl-3,5-dimethyl-4-arylazopyrazoles (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 287 (1977), S. 319-319 
    Details
    ISSN: 1618-2650
    Keywords: Trenn. von Carbamyldimethylarylazopyrazolen ; Chromatographie, Dünnschicht
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00634514
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  • 39
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    Dünnschicht-chromatographische Trennung und Nachweis der Seltenen Erden in Erzen, technischen Produkten und Rein-Elementen (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 288 (1977), S. 28-31 
    Details
    ISSN: 1618-2650
    Keywords: Nachw. und Trenn, von Seltenen Erden in Erzen, Monazit, Techn. Produkten ; Chromatographie, Dünnschicht ; Di-isopropyläther/Tetrahydrofuran/HNO3
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung In Monaziten, technischen Produkten und Reinelementen (Verbindungen) wurden die Seltenen Erden dünnschicht-chromatographisch mit dem Laufmittel Di-isopropyläther-Tetrahydrofuran-Salpetersäure (65%) (100∶70∶6) getrennt und nachgewiesen. Mengenverhältnisse von 400∶1 sind zu trennen und eindeutig zu identifizieren. Bei größeren Unterschieden in den Rf-Werten kann das Verhältnis bis zu 1000∶1 betragen. Die absolut nachweisbare Menge auf einem Chromatogramm beträgt 0,05–0,1 μg. Die Größe der Flecken ermöglicht eine halbquantitative Abschätzung der Gehalte. Die Analysendauer beträgt mit Aufschluß 2 h, ohne Aufschluß 70 min.
    Notes: Summary In monazites, technical products and pure elements, rare earth elements were separated and identified by thin-layer chromatography using a 100∶70∶6 mixture of diisopropyl ether, tetrahydrofuran and HNO3 (65%) as an eluent. It is possible to separate and characterize them in concentrations of 400∶1 unambiguously. If the Rf-values differ remarkably a ratio of 1000∶1 is acceptable. The amount absolutely detectable on a chromatogram is 0.05–0.1 μg. The area of the spots allows a semiquantitative estimation. The time required for one analyses is without decomposition 70 min and including decomposition 2 h.
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    URL: http://dx.doi.org/10.1007/BF00634316
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  • 40
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    TLC separation of some isomeric 2- and 6-[2-amino (and substituted amino)-4-thiazolyl] benzothiazoles (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 288 (1977), S. 285-285 
    Details
    ISSN: 1618-2650
    Keywords: Trenn. von Aminothiazolyl-benzothiazolen ; Chromatographie, Dünnschicht
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00539397
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  • 41
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    Dünnschicht-chromatographische Trennung und Nachweis der Seltenen Erden aus einer Uran-Matrix (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 288 (1977), S. 288-288 
    Details
    ISSN: 1618-2650
    Keywords: Trenn. von Seltenen Erden aus Uran ; Chromatographie, Dünnschicht
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00539399
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