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  • 1995-1999  (4)
  • 1980-1984  (1)
  • 1930-1934  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Prognostic relevance of immunohistology, tumor size and vascular space involvement in axillary node negative breast cancer (1998)
    Springer
    Archives of gynecology and obstetrics 261 (1998), S. 139-146 
    Details
    ISSN: 1432-0711
    Keywords: Key words: Breast cancer ; Immunohistology ; Prognosis ; Axillary node negative ; ROC curve
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Objective: Adjuvant treatment for patients with axillary node negative (ANN) breast cancer is controversial because operation alone gives a 70% cure rate. Features which predict recurrence are needed and we therefore evaluated the predictive value of tumor diameter and vascular involvement as well as of estrogen receptors (ER), progesterone receptors (PR), p53, MIB-1, c-erb and PCNA demonstrated by immunohistological staining in 178 patients with ANN breast cancer. Although ER status, tumor diameter and vascular space involvement were significantly correlated to the development of recurrence, their sensitivity, specificity and predictive value were too low to give them clinical value.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004040050213
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Alkohole (1933)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 91 (1933), S. 126-127 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01354953
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    A low-energy compatible SU(4)-type model for vector leptoquarks of mass $\leq$ 1 TeV (1999)
    Springer
    The European physical journal 7 (1999), S. 141-148 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. The Standard Model is extended by a $SU(2)_L$ singlet of vector leptoquarks. An additional SU(4) gauge symmetry between right-handed up quarks and right-handed leptons is introduced to render the model renormalizable. The arrangement is made in such a way that no conflict with low energy restrictions is encountered. The $SU(2)_L$ singlet mediates interactions between the right-handed leptons and up type quarks for which only moderate low energy restrictions $M_{LQ}/g_{LQ} 〉 $ few hundred GeV exist. However, it is not a candidate to explain the anomalous HERA data at large $Q^2$ because theoretical reasons imply that $g_{LQ} \geq g_s$ which would give a much stronger anomalous HERA effect. We furthermore argue that the inequality $g_{LQ} \geq g_s$ is a general feature of consistent vector leptoquark models. Although our model is not relevant for HERA, it is interesting per se as a description of leptoquarks of mass $\leq$ 1 TeV consistent with all low-energy requirements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100529900965
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Complete helicity decomposition of the $\gamma^*/Z^*t\bar{t}$ vertex including higher order QCD corrections and applications to $e^+e^-\rightarrow t \bar t$ (1999)
    Springer
    The European physical journal 8 (1999), S. 447-456 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. The complete density matrix for all polarization configurations in the process $\gamma^*/Z^* \rightarrow t\bar t$ , where $\gamma^*/Z^*$ is an off-shell photon or Z boson and t is the top quark, is calculated numerically including oneloop QCD corrections, i.e. virtual and real gluon contributions in $O(\alpha_s)$ . The analysis is done in the framework of the helicity formalism. The results are particularly suited for top quark production at the Linear Collider, but may be useful in other circumstances as well. Relations to LEP and Tevatron physics are pointed out.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100529901098
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    A note on the QCD corrections to forward-backward asymmetries of heavy-quark jets inZ decays (1995)
    Springer
    The European physical journal 67 (1995), S. 123-127 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The measurement of the forward-backward asymmetries of heavy quarks provides one of the most precise determinations of sin2 θ W inZ decays. We discuss in detail the one-loop QCD radiative corrections to these asymmetries. Results are given for single heavy-quark jet asymmetries and asymmetries of the thrust axis, as well as for heavy-quark two-jet final states.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01564827
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Aminocarbonylthioformiate - Darstellung und Reaktionen (1981)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 480 (1981), S. 186-192 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Aminocarbonylthioformates  -  Preparation and ReactivitySodium aminocarbonylthioformate NaSCOCONH2 (II) is obtained by reaction of sodium cyanodithioformate with acetone in presence of a secondary amine and water. II permits to produce the acid HSCOCONH2 · H2O (IX) and salts MII(SCOCONH2)2 · 2H2O. In basic aqueous solutions hydrolysis of II to oxaminate and oxalate, respectively, takes place, an excess of aqueous ammonia leads to amidino formic acid. In organic solvents the reaction of IX with N-bases yields stable ammonium salts. The results of i.r. spectroscopic and thermogravimetric measurements are discussed.
    Notes: Natriumaminocarbonylthioformiat NaSCOCONH2 (II) entsteht bei der Umsetzung von Natriumcyanodithioformiat mit Aceton in Gegenwart von sekundärem Amin und Wasser. Aus II sind die Säure HSCOCONH2 · H2O (IX) und Salze zweiwertiger Kationen MII(SCOCONH2)2 · 2H2O zugänglich. In basischen wäßrigen Lösungen reagiert II unter Bildung von Oxaminat bzw. Oxalat, mit überschüssigem wäßrigen Ammoniak setzt es sich zu Amidinoameisensäure um. In organischen Lösungsmitteln bildet die Säure IX mit N-Basen stabile Ammoniumsalze. Die Ergebnisse IR-spektroskopischer und thermogravimetrischer Untersuchungen werden diskutiert.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19814800924
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    Paper (German National Licenses)
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