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  • 1990-1994  (6)
  • 1960-1964  (1)
  • 1955-1959  (1)
  • 1991  (6)
  • 1964  (1)
  • 1959  (1)
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Materialart
Erscheinungszeitraum
  • 1990-1994  (6)
  • 1960-1964  (1)
  • 1955-1959  (1)
Jahr
Schlagwörter
  • 1
    Digitale Medien
    Digitale Medien
    Deep impurity levels and diffusion coefficient of manganese in silicon (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 1440-1445 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Manganese-related deep levels in n- and p-type silicon have been investigated by deep level transient spectroscopy and Hall effect. Two electron traps of Ec−(0.12±0.01) eV and Ec−(0.41±0.01) eV, and a hole trap of Ev+(0.32±0.01) eV are found in manganese-doped silicon. The energy levels of these traps correspond to the transitions between four charge states (Mn−, Mn0, Mn+, Mn++ ) of interstitial manganese. An additional donor-type electron trap of Ec−(0.51±0.02) eV is observed in the n-type samples, and the trap can be tentatively assigned to substitutional manganese. Furthermore, an electron trap of Ec−(0.50±0.02) eV is observed for n+p junction samples diffused with manganese in boron-doped p-type silicon. The trap is attributed to the manganese-boron complex, which is formed owing to the pairing reaction of interstitial manganese and substitutional boron. From the investigation of the pairing reaction, the diffusion coefficient DMn of interstitial manganese is determined in the temperature range 14–90 °C. It can be represented by the expression DMn=2.4×10−3 exp(−0.72/kT)cm2 s−1.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.347285
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  • 2
    Digitale Medien
    Digitale Medien
    Second harmonic generation coherent interferometry disclosing the orientation of the submerged hemicyanine layer in a Langmuir-Blodgett multilayer structure (1991)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 95 (1991), S. 9636-9638 
    Details
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/j100177a009
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  • 3
    Digitale Medien
    Digitale Medien
    Palpation as a method for evaluating occlusal discrepancies (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral rehabilitation 18 (1991), S. 0 
    Details
    ISSN: 1365-2842
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: In this study, 30 dentists were surveyed about their methods of palpating teeth for the evaluation of premature contacts. Thirty-eight dentists were then tested to determine their ability to discriminate degrees of prematurity using each of two different methods of palpation. The degree of digital pressure used by each dentist during palpation was also measured. The majority of dentists chose the same method for palpation: a single forefinger overlaying the facial surfaces of the central incisors being evaluated. In the discrimination test, the majority of dentists were able to identify reliably occlusal interference of ≥50 μm regardless of the palpation method used.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2842.1991.tb00079.x
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  • 4
    Digitale Medien
    Digitale Medien
    Human gnathostomiasis (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of cutaneous pathology 18 (1991), S. 0 
    Details
    ISSN: 1600-0560
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Two patients became infested with Gnathostoma nipponicum after eating raw loach-fish they had caught in a rice field in central Japan. A fragment of Gnathostoma was found in a biopsy from one of them. The sera of both patients reacted with Gnathostoma antigen using indirect immunofluorescence. Scanning electron microscopy was performed on blocks of the paraffin-embedded parasite sample and the viscera of a fish from the same rice field. The risk of eating raw freshwater fish is discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1600-0560.1991.tb00137.x
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  • 5
    Digitale Medien
    Digitale Medien
    The right way (1991)
    [s.l.] : Nature Publishing Group
    Nature 351 (1991), S. 193-193 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] SIR - In our recent paper on information storage using films of an azobenzene deriva-tive1, we proposed a mechanism to explain the experimental results which differed from that published by us in an earlier, preliminary paper2. After detailed investigations, we have concluded that the earlier ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/351193c0
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  • 6
    Digitale Medien
    Digitale Medien
    Two Hæmoglobins in Chum Salmon (1959)
    [s.l.] : Nature Publishing Group
    Nature 184 (1959), S. 1418-1418 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] The present communication deals with crystallization and several properties of the two components. Haemolyzate from chum salmon blood saturated with carbon monoxide, was 0-35 saturated with ammonium sulphate at neutral pH and suctioned. The nitrate was 0-6 saturated with the salt and the resulting ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/1841418a0
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  • 7
    Digitale Medien
    Digitale Medien
    The chemoreflex induced by intraarterial injection of Aza-azepinophenothiazine, veratridine and bradykinin into femoral and brachial arteries of innervated and divided limbs of a dog (1964)
    Springer
    Cellular and molecular life sciences 20 (1964), S. 394-396 
    Details
    ISSN: 1420-9071
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Zusammenfassung Reflektorische Blutdrucksteigerung wurde durch intraarterielle Injektion von Tetrahydro-azaazepinophenothiazin und Veratridin am Präparat des innervierten Hinterbeins vom Hund hervorgerufen. Während kleine Dosen von Bradykinin nur leichte Blutdrucksenkung verursacht, führen grössere Dosen zu nachhaltigem Blutdruckanstieg. Bei Abhäuten des Hinterbeinpräparates unterblieb der Primäreffekt.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02147987
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  • 8
    Digitale Medien
    Digitale Medien
    Chromatography of inorganic ions on diethyl-(2-hydroxy-propyl)aminoethyl cellulose layers in hydrochloric acid and in HCl-ammonium chloride media (1991)
    Springer
    Chromatographia 31 (1991), S. 60-62 
    Details
    ISSN: 1612-1112
    Schlagwort(e): Thin-layer chromatography ; Diethyl-(2-hydroxy-propyl)aminoethyl (QAE)-cellulose ; Hydrochloric acid and chloride media ; Inorganic ions ; Re(VII)
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Summary Thin-layer chromatographic behavior of 49 inorganic ions has been systematically studied on diethyl-(2-hydroxy-propyl)aminoethyl (QAE)-cellulose, a strongly basic anion exchanger, in aqueous hydrochloric acid and in acid-ammonium chloride media (0.01 to 1.0 mol dm−3). Aspects of the adsorption behavior of the ions on the cellulose are compared with those on other anion exchangers in the same eluent system. Feasibilities of separation of multicomponent mixtures are proposed on QAE-cellulose in both media. In particular, the selective separation of Re(VII) from many other ions can be accomplished on these systems.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02290497
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