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  • 1985-1989  (6)
  • 1970-1974  (5)
  • 1
    Electronic Resource
    Electronic Resource
    Dimethyltin glycylmethionate (1986)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 42 (1986), S. 536-538 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270186095483
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  • 2
    Electronic Resource
    Electronic Resource
    A model for a light graviphoton (1986)
    Springer
    The European physical journal 33 (1986), S. 255-261 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We describe an explicitN=2 supergravity model where an arbitrarily light vector boson (“graviphoton”) is coupled, with typical gravitational strength to matter hypermultiplets, possessing unbroken gauge interactions as well. We discuss: i) the mass and the couplings of the graviphoton; ii) the consistency of its coupling to a mass generated by the Higgs mechanism; iii) the actual composition of the graviphoton in terms of the original vector fields of the Lagrangian (e.g. its mixing with the photon).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01411143
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  • 3
    Electronic Resource
    Electronic Resource
    Induction to erythroid differentiation of K 562 cells by 1-β-D-arabinofuranosylcytosine is inhibited by iron chelators: reversion by treatment with hemin (1988)
    Springer
    Annals of hematology 57 (1988), S. 25-30 
    Details
    ISSN: 1432-0584
    Keywords: K 562 cells ; Erythroid differentiation ; Hemin ; Iron chelators
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Erythroid differentiation of human leukemic K 562 cells is inhibited by the iron chelator desferrioxamine (DF). In addition, desferrioxamine induces an increase of uptake of hemin. When hemin is added to the culture medium, the DF-mediated inhibitory effects on erythroid induction are reversed. Briefly, hemin allows hemoglobin synthesis by K 562 cells induced to erythroid differentiation by 1-β-D-arabinofuranosylcytosine (ara-C) and treated with 12.5 μg/ml DF. In addition, it was found that hemin treatment leads to a reversion of inhibition of K 562 cell proliferation mediated by 50–75 μg/ml DF. This effect of hemin was also detected in other cultured human tumor cell lines (B-lymphoid, erythroleukemic and from breast carcinomas, melanomas and kidney carcinomas).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00320631
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  • 4
    Electronic Resource
    Electronic Resource
    Di-tert-butyl(glycylglycinato)tin(IV) monohydrate (1989)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 45 (1989), S. 728-730 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270188013320
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  • 5
    Electronic Resource
    Electronic Resource
    Angiotensin converting enzyme (ACE) in scleroderma (1987)
    Springer
    Clinical rheumatology 6 (1987), S. 300-301 
    Details
    ISSN: 1434-9949
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02201047
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  • 6
    Electronic Resource
    Electronic Resource
    CP violation in very high energyp $$\bar p$$ collisions (1986)
    Springer
    The European physical journal 32 (1986), S. 437-440 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We investigate the consequences of a CP violating gauge invariant pointlike four-fermion interaction at the TeV scale. It induces an enhancement of the production cross-sections $$\sigma \left( {p\bar p \to e^ - \bar v_e + X} \right)$$ and $$\sigma \left( {p\bar p \to e^ + \bar v_e + X} \right)$$ , together with a CP violating relative difference between these cross-sections at the % level, due to interference with radiative corrections. A complete calculation of the CP asymmetry is made for different values of the center of mass energy $$\sqrt s = 2, 10, 40 TeV$$ , 40 TeV.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01551841
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  • 7
    Electronic Resource
    Electronic Resource
    Complexes of Organometallic Compounds. XXIV. Spectroscopic Studies on Complexes of Diorganotin(IV) Moieties with SNO and ONO Tridentate Ligands (1970)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 376 (1970), S. 180-195 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Complexes R2SnL (R = CH3, C6H5; L2- = tridentate ONO and SNO ligands) are synthesized, and their configuration is investigated by vibrational, PMR and electronic spectroscopy.The ligands H2L are: 2-pentanone-4-(2-benzothiazolinyl), (prepared for the first time); 3-(o-hydroxyphenylamino)crotonophenone; 2-(o-hydroxyphenyl)benzothiazoline; 2,2′methylidynenitrilo diphenol. Their configuration at the solid state is discussed. The ligands seem to coordinate the tin (IV) atoms as planar tridentates, in the dianion Schiff base form.The R2SnIV moieties very probably assume a bent configuration in R2SnL. Hypotheses on the structure of R2SnL are then advanced: the possible occurrence of a quasi trigonal bipyramidal geometry, where the two carbon (R) atoms and the azomethine nitrogen atom are allocated in the trigonal plane and the O, O or S, O ligand atoms lie in axial position, is discussed.
    Notes: Komplexverbindungen vom Typ R2SnL (R = CH3, C6H5; L ist ein dreizähniger ONO- oder SNO-Ligand) werden dargestellt und ihre IR-, KMR- und elektronischen Spektren untersucht, um die Strukturen zu klären.Als Liganden (LH2) werden benutzt: 4-(2-Benzothiazolinyl)-pentan-2-on, (hier zum ersten Mal dargestellt); 3-(o-Hydroxyphenylamino)crotonophenon; 2-(o-Hydroxyphenyl)-benzothiazolin; und N-o-Hydroxybenzyliden-o′-hydroxyanilin.Im festem Zustand umgeben die organischen Liganden L2- das Zinn(IV)-Atom als ebene dreizähnige Liganden. Die R2SnIV-Reste sind wahrscheinlich nicht linear. Eine mögliche Anordnung der Liganden ist eine trigonale Bipyramide, in der die zwei R-Reste und das Stickstoffatom in der trigonalen Ebene und die zwei Sauerstoffatome bzw. das Sauerstoff- und das Schwefelatom in den zwei anderen Positionen auf beiden Seiten der Ebene liegen.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19703760211
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  • 8
    Electronic Resource
    Electronic Resource
    Complexes of Tin(IV) with Tridentate Ligands MÖSSBAUER, Infrared, and Solution Phase Studies (1974)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 409 (1974), S. 248-256 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Komplexe des Zinn (IV) mit dreizähigen Liganden. Mössbauer- und IR-Spektren sowie Untersuchungen von LösungenDie Struktur von SnIV-Komplexen mit dreizähnigen “planaren” Liganden, Sn(trid)2 und HNEt3Cl2Sntrid, wurde in fester Phase und in Lösung untersucht mit Hilfe von IR- und MÖSSBAUER-Spektroskopie (für den festen Zustand) sowie osmometrisch, mit Leitfähigkeitsmessungen, UV-VIS- und NMR-Spektroskopie. Danach wird das Vorliegen von monomerem Sn(trid)2 und ionischem [HKEt3]+[Cl3Sntrid]- angenommen. Bei beiden Arten von Verbindungen liegt vermutlich oktaedrische Konfiguration vor.
    Notes: The configuration in the solid state and in solution phase of complexes of SuIV wit,li tridentate “planar” ligands, Sn(trid)2 and HNEt3Cl3 Sntrid, have been investigated by infrared and MÖSSBAUER spectroscopy, as well as by osmometry, conductivity, and electronic and PMR spectroscopy. The presence of monomeric Sn(trid)2 and ionic [HNEt+3] [Cl3Sn trid-] species has been inferred. Octahedral type configurations are advanced for both classes of compounds.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19744090214
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  • 9
    Electronic Resource
    Electronic Resource
    Complexes of Organometallic Compounds. XXVII. Studies on Diorganolead (IV) Moieties Six-coordinated by ONNO Tetradentate Ligands (1972)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 387 (1972), S. 126-133 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Darstellung neuer Komplexverbindungen: R2PbL (R = CH3, C2H5, C6H5; L-2 sind zweiwertige Anionen, in der „planaren“ SCHIFFSCHEN Basen-Konfiguration, der vierzähnigen ONNO-Liganden Disalicylal-äthylendiamin und Glyoxal-bis-[2-hydrocyanil).In festem Zustand wurden die Strukturen durch IR-Spektren und in Lösung durch 1HMR-und Elektronenspektren untersucht, und es wird eine oktaedrische Struktur mit einem linearen R2Pb-Rest und den ONNO-Atomen mit einer vierzähligen planaren Anordnung um das Blei-(IV)-Atom vorgeschlagen.
    Notes: New complexes R2PbL, where L2- are the dianions in the “planar” SCHIFF base form, of the tetradentate ONNO ligands α, α′ (ethylenedinitrilo)dicresol and 2,2′ bis-benzoxazoline, were synthesized. Their configuration was investigated at the solid state by infrared spectroscopy, and in solution phase mainly by electronic and PMR spectroscopy. An octahedral type structure with linear CPbC moieties, and the ONNO ligand atoms chelating PbIV in a square plane, was advanced.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19723870114
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  • 10
    Electronic Resource
    Electronic Resource
    Die Kristall- und Molekülstruktur von (C6H5)2SnSAT (SAT = dreizähniges, aus 2-(o-Hydroxyphenyl)benzothiazolin hervorgehendes Dianion) (1974)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 407 (1974), S. 257-265 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal and Molecular Structure of (C6H5)2SnSAT, (SAT = Tridentatte Dianion from 2-(o-Hydroxyphenyl)benzothiazoline)(C6H5)2SnSAT, C25H19NOSSn (SAT = tridendate dianion of SCHIFT base form, derived from 2-(o-hydroxyphenyl)benzothiazoline), crystallizes in the space group P21/n(C2h5) with a = 9.65(1), b = 16.08(1), c = 13.83(1) Å, β = 94.95(10)° Z = 4. The crystal and molecular structure has been solved using 3150 symmetrical independent reflections and applying the heavy atom method; the position of all atoms, except the H atoms has been determined. As interatomic distances have been found: Sn—S: 2.496(1) Å, Sn—O: 2.093(2) Å, Sn—N: 2.217(3) Å, Sn—C 1 (phenyl group I): 2.120(3) Å, Sn—C 7 (phenyl group II): 2.126(3) Å, O—C: 1.324(4) Å, C 19-N (Schief base bridging group): 1.287(5) Å, C 19-C: 1.448(5) Å, N—C: 1.419(5) Å, mean C—C distances in the two phenyl groups at Sn: 1.391(6) Å. The coordination polyhedron around Sn has essentially trigonal bipyramidal structure, which however is heavily distorted; N and the two Sn-phenylgroups occupy the equatorial positions.
    Notes: (C6H5)2SnSAT, C25H19NOSSn (SAT = dreizähniges Dianion mit Schiffscher Base-Struktur, abgeleitet von 2-(o-Hydroxyphenyl)benzothiazolin), kristallisiert in der Raumgruppe P21/n (C2h5) mit a = 9,65(1), b = 16,08(1), c = 13,83(1) Å, β = 94,95(10)° und Z = 4. Die Kristall- und Molekülstruktur wurde an Hand von 3150 symmetrisch unabhängigen Reflexen nach der Schweratommethode bestimmt und die Atomlagen bis auf die der Wasserstoffatome ermittelt. Für die interatomaren Abstände im Molekül wurden gefunden: Sn—S: 2,496(1) Å, Sn—O: 2.093(2) Å, Sn—N: 2,217(3) Å, Sn—C 1 (Phenylrest I): 2,120(3) Å, Sn—C 7 (Phenylrest II): 2,126(3) Å, O—C: 1,324(4) Å, C 19-N (Brückenglied der Schiffschen Base): 1,287(5) Å, C 19-C: 1,448(5) Å, N—C: 1,419(5) Å, Mittelwert der C—C-Abstände der beiden Phenylreste an Sn: 1,391(6) Å. Das Koordinationspolyeder um das Sn-Atom hat die Grundstruktur einer trigonalen Bipyramide, die jedoch erheblich verzerrt ist; N und die beiden Phenylgruppen am Sn liegen äquatorial.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19744070302
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