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  • 1980-1984  (12)
  • 1920-1924
  • 1984  (12)
  • 1
    Digitale Medien
    Digitale Medien
    Reactive iodine compounds. 8. Synthesis and copper(I) cyanide-promoted cyanation of iodoformic esters (1984)
    s.l. : American Chemical Society
    The @journal of organic chemistry 49 (1984), S. 1174-1176 
    Details
    ISSN: 1520-6904
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/jo00181a005
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  • 2
    Digitale Medien
    Digitale Medien
    CHAROS, CHARUN, CHARON (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Oxford journal of archaeology 3 (1984), S. 0 
    Details
    ISSN: 1468-0092
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Klassische Archäologie
    Notizen: Summary. An Athenian head-vase by the potter Sotades, depicting a grim and emaciated old man, is interpreted as representing the demon Charos, a threatening death-figure familiar from medieval and modern Greek poetry as well as traditional folklore but hitherto undocumented in Greek art. Charun is shown to be the Etruscan derivate of Charos, whose rarity can perhaps be explained by the success of the less frightening (because euphemistic) Charon.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1468-0092.1984.tb00122.x
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  • 3
    Digitale Medien
    Digitale Medien
    Syphilis, hepatitis A and hepatitis B seromarkers in homosexual men (1984)
    Springer
    Journal of molecular medicine 62 (1984), S. 810-813 
    Details
    ISSN: 1432-1440
    Schlagwort(e): Sexually transmitted diseases ; Homosexuals ; Syphilis ; Hepatitis A and B
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Two hundred homosexual men were investigated for prevalence rates of syphilis, hepatitis A (HAV) and hepatitis B (HBV). A reactive Treponema pallidum haemagglutination test (TPHA) was found in 56.3% of the participants. In 81.7% HBV scromarkers were detected. Hepatitis B surface antigen (HBsAg) was present in 6.6%. Anti-HAV was found in 51.0%. Risk factors for acquisition of these infections are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01711856
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  • 4
    Digitale Medien
    Digitale Medien
    Photo-enhanced etching ofn-Si (1984)
    Springer
    Applied physics 33 (1984), S. 243-245 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 73.40.Mr ; 82.30.Lp ; 85.30.De ; 85.30.Tv
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract The etch rate ofn-type Si in diluted HF solutions was investigated as a function of the bias voltage applied to the Si/electrolyte interface in the dark and under illumination. It was observed that the etch rate depends very sensitively on the minority carrier flow through this interface. For an illumination intensity of 5.3×1016 photons/cm2 s (γ=550nm) and the depleted Si/electrolyte interface biased slightly (less than 1 V) in reverse, the etch rate is increased by a factor of more than 1000 as compared to the etch rate under open-circuit condition. This effect can be used to create etch patterns during device processing without prior masking the semiconductors. Using the same effect it should be possible to trim the thickness of Si layers on (semi-) insulating substrates for the fabrication of enhancement-mode FETs.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00614665
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  • 5
    Digitale Medien
    Digitale Medien
    Differential evaluation of the Hall effect in silicon with oxygen-related donors (1984)
    Springer
    Applied physics 33 (1984), S. 47-50 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 71.55.Fr ; 72.80.Cw
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract The free-electron concentration as a function of the temperature is analyzed differentially for silicon with oxygen-related donors formed by annealing at 430 °C. The analysis yields defect levels atE c−0.25 eV,E c−0.14eV, andE c−0.055 eV assuming the degeneracy factors to be unity. The corresponding defect level concentrations are approximately proportional to the annealing time. Their formation rates are between 1 and 3×1010cm−3s−1 at 430 °C annealing temperature.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01197085
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  • 6
    Digitale Medien
    Digitale Medien
    Detection of respiratory virus antigens in nasopharyngeal secretions from patients with acute respiratory disease by radio-immunoassay and tissue culture isolation (1984)
    Springer
    Medical microbiology and immunology 173 (1984), S. 37-44 
    Details
    ISSN: 1432-1831
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract An investigation was made of the sensitivity and specificity of four-layer radio-immunoassays (RIA) in the detection of adenovirus, respiratory syncytial virus, influenza virus types A and B, as well as para-influenza virus types 1, 2 and 3 from nasopharyngeal aspirates of 146 patients with acute respiratory disease. The sensivity of RIA was comparable with that of tissue culture isolation if the total number of positives is considered. The difference may have been caused both by a higher efficiency of the RIA for detection of inactivated or non-cultivable agents and by a higher efficiency of tissue culture methods if the samples contained only small amounts of antigen. Differences between the two antigen detection systems were found in particular with respiratory syncytial virus and influenza B virus. At present, the use of tissue culture isolation together with RIA is the optimal routine laboratory procedure for the diagnosis of respiratory infections.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02123567
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  • 7
    Digitale Medien
    Digitale Medien
    Dynamics of the cytoskeleton inAmoeba proteus: II. Influence of different agents on the spatial organization of microinjected fluorescein-labeled actin (1984)
    Springer
    Protoplasma 119 (1984), S. 79-92 
    Details
    ISSN: 1615-6102
    Schlagwort(e): Amoeba proteus ; Cytoskeleton ; Morphological changes ; Iodoacetamido-fluorescein-(IAF)-labeled actin ; Microinjection
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary Iodoacetamido-fluorescein-(IAF)-labeled actin was microinjected into normal locomotingAmoeba proteus. Thereafter (30–60 minutes) changes in the cytoplasmic fluorescence distribution pattern and contractile activity were induced by internal and external chemical stimulation. Different agents such as phalloidin, procaine, 2.4-dinitrophenol (DNP), puromycin, ouabain and n-ethyl maleimide (NEM) interfere with the excitation-contraction mechanism involved in ordered pseudopodium formation during ameboid movement and cause various morphogenetic reactions based on actin polymerization-depolymerization cycles. Most frequent changes are (a) local condensation of IAF-actin and formation of a continuous IAF-actin layer at the cytoplasmic surface of the cell membrane and around the pulsating vacuole, (b) immobilization and hyalo-granuloplasm separation by combined contraction and detachment of the IAF-actin layer from the cell membrane, (c) organized and disorganized formation of pseudopodia by local contraction and disintegration of the IAF-actin layer, and (d) alterations in the rheological properties of the protoplasmic matrix by changes in the molecular state of soluble actin not incorporated into the cytoskeleton. The experimental approaches to the function of the actomyosin system in large amebas attainable by the method ofin vivo molecular cytochemistry are discussed in detail with respect to the participation of the cytoskeleton in motive force generation for cytoplasmic streaming and ameboid movement.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01287820
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  • 8
    Digitale Medien
    Digitale Medien
    1,4-Diazobicyclo[2.2.2]octane-catalyzed coupling of aldehydes and activated double bondsPart 2: see [1].. Part 3. A short ans practical synthesis of mikanecic acid (4-vinyl-1-cyclohexene-1,4-dicarboxylic acid) (1984)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 67 (1984), S. 413-415 
    Details
    ISSN: 0018-019X
    Schlagwort(e): Chemistry ; Organic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The title dicarboxylic acid 1d has been prepared in 24% overall yield via, 1,4-diazabicyclo[2.2.2]octane (DABCO)-catalyzed coupling of ethanal and tert-butyl propenoate (3) to 4, SN2′-reaction to tert-butyl (Z)-2-romomethyl-2-butenoate (5a), dehydrobrominatin to tert-butyl 2-methylidene-3-butenoate (2c), dimerizatoin to di-tert-butyl 4-vinyl-1-cyclohexene-1,4-dicarboxylate (1c) and acidic ester cleavage. Acidic cleavage of easily obtainable 5a affords (Z)-2-bromomethyl-2-butenoic acid (5a) in 68% yield with respect to ethanal.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/hlca.19840670209
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  • 9
    Digitale Medien
    Digitale Medien
    2,2,4,4-Tetramethyl-3-methylenebicyclo[3.2.1]oct-6-ene (1984)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 117 (1984), S. 3325-3329 
    Details
    ISSN: 0009-2940
    Schlagwort(e): Chemistry ; Inorganic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: 2,2,4,4-Tetramethyl-3-methylenbicyclo[3.2.1]oct-6-enDie sterisch anspruchsvolle Titelverbindung 1 wurde in einer Eintopfreaktion aus Cyclopentadien und 2,4-Dimethyl-3-[(trimethylsilyl)methyl]-3-penten-2-ol (5) in Gegenwart von Titantetrachlorid/N-Methylanilin hergestellt. 2,2,4,4-Tetramethylbicyclo[3.2.1]oct-6-en-3-on (4) wurde vereinfacht im 15-g-Maßstab dargestellt.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/cber.19841171117
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  • 10
    Digitale Medien
    Digitale Medien
    Notizen. The Synthesis of Iodoglyoxalic Esters. Cleavage of Tetrahydrofuran and 1,2-Dimethoxyethane (1984)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 117 (1984), S. 408-412 
    Details
    ISSN: 0009-2940
    Schlagwort(e): Chemistry ; Inorganic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Die Synthese von Iodglyoxylsäureestern. Spaltung von Tetrahydrofuran und 1,2-DimethoxyethanEine Serie von Iodglyoxylaten 2a - i wird aus Chlorglyoxylaten 1a - i und Natriumiodid in Acetonitril dargestellt und durch Tieftemperaturextraktion mit Pentan isoliert. Iodglyoxylsäureester eignen sich zur acylierenden Spaltung von Ethern, z. B. Tetrahydrofuran und 1,2-Dimethoxyethan.
    Zusätzliches Material: 4 Tab.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/cber.19841170132
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