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  • 1990-1994  (3)
  • 1980-1984  (3)
  • 1975-1979  (13)
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  • 1
    Electronic Resource
    Electronic Resource
    3-Methyl-2H-1-benzopyran potassium channel activators (1991)
    s.l. : American Chemical Society
    Journal of medicinal chemistry 34 (1991), S. 3074-3085 
    Details
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jm00114a017
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Renin inhibitors containing new P1-P1' dipeptide mimetics with heterocycles in P1' (1992)
    s.l. : American Chemical Society
    Journal of medicinal chemistry 35 (1992), S. 3525-3536 
    Details
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jm00097a010
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  • 3
    Electronic Resource
    Electronic Resource
    Photoinactivation of catalase in needles of Norway spruce (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 90 (1994), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Catalase IEC 1.11.1.6) activity in Norway spruce (Picea abies [L.] Karst.) needles was examined under different environmental conditions. When shade-adapted spruce trees were exposed to full sunlight or to high light intensities in growth chambers, the catalase activity decreased. Under continuous light the activity was reduced in comparison to the control grown in light/dark cycles. The reduction of the activity was not temperature dependent. Under field conditions the activity was higher in hranches oriented north than in those oriented south. A diurnal rhythm with a maximum in the night was delected. The reduction in catalase activity also occurred in young white needles of Picea ahies vur. argenteospica. which are free of chlorophyll. It is concluded that in Norway spruce needles there is a ligh:-dependent photoinactivation of catalase. which is not temperature-dependent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1994.tb08820.x
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  • 4
    Electronic Resource
    Electronic Resource
    Über Perowskitphasen in den Systemen AO—SE2O3—UO2,x mit A = Erdalkali und SE = Seltene Erden, La sowie Y. VIII. Die Systeme Ba2CaUO6—Ba2Gd0,67UO6 und Ba2CaUO6—Ba2Y0,67UO6 (1976)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 422 (1976), S. 115-133 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On Perovskite Phases in the Systems AO—SE2O3—UO2,x with A = Alkaline Earth Metal and SE = Rare Earths, La, and Y. VIII. The Systems Ba2CaUO6—Ba2Gd0.67UO6 and Ba2CaUO6—Ba2Y0.67UO6The ordered perovskite Ba2CaUO6 forms a solid solution series with Ba2Gd0.67UO6 and Ba2Y0.67UO6, respectively. The deviations from the ideal behaviour are studied by x-ray, diffuse reflectance and vibrational methods.
    Notes: Der geordnete Perowskit Ba2CaUO6 bildet mit Ba2Gd0,67UO6 bzw. Ba2Y0,67UO6 eine lückenlose Mischkristallreihe. Die Abweichungen vom idealen Verhalten werden röntgenographisch und an Hand der diffusen Reflexions- und Schwingungsspektren untersucht.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19764220204
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  • 5
    Electronic Resource
    Electronic Resource
    Über die Polymorphie der Perowskite Ba2SE0,67WVIO6. II. Die Systeme Ba2Nd0,67(1-x) Y0,67xWO6 und Ba2Nd0,67W1-xUxO6 (1977)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 431 (1977), S. 134-143 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Polymorphism of Perovskite Compounds Ba2SE0.67WVIO6. II. The Systems Ba2Nd0.67(1-x)Y0.67xWO6 and Ba2Nd0.67W1-xUxO6In the system Ba2Nd0.67(1-x)Y0.67xWO6 the formation of a continuous series of mixed crystals with cubic 1:1 ordered perovskite structure is observed. The existence of a hexagonal modification is confined to the Y-rich side (x ≥ 0,9). In the Ba2Nd0.67W1-xUxO6 series only for x ≤ 0,25 homogeneous cubic perovskites are obtained. In contrast to systems with other rare earths the Nd series show uncommon optical properties.
    Notes: Im System Ba2Nd0,67(1-x)Y0,67xWO6 wird die lückenlose Bildung von Mischkristallen mit kubischer 1:1 geordneter Perowskitstruktur beobachtet. Die Existenz einer hexagonalen Modifikation ist auf die Y-reiche Seite (x ≥ 0,9) beschränkt. In der Reihe Ba2Nd0,67W1-xUxO6 können einheitliche kubische Perowskite allein für x ≤ 0,25 erhalten werden. Im Gegensatz zu Systemen mit anderen Seltenen Erden zeichnen sich die Nd-Reihen durch ungewöhnliche optische Eigenschaften aus.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19774310113
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  • 6
    Electronic Resource
    Electronic Resource
    Über geordnete Perowskite mit Kationenfehlstellen Die Systeme Ba2MgWO6-Ba2Y0,67WO6 und Ba2CaWO6-Ba2Y0,67WO6 (1977)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 431 (1977), S. 144-152 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On Ordered Perovskites with Cationic Defects. The Systems Ba2MgWO6—Ba2Y0.67WO6 and Ba2CaWO6—Ba2Y0.67WO6The perovskites Ba2MgWO6 and Ba2CaWO6 show complete miscibility with Ba2Y0.67WO6. The mixed crystals have a cubic 1:1 ordered perovskite structure, whereas with x an increase of cationic defects is observed (systems Ba2B1-xIIY0.67x□0.33xWO6). Depending on the occupation of the neighbouring positions different types of WO6 octahedra are present. The transformation cubic → hexagonal, which is characteristic for Ba2Y0.67WO6, is oppressed by the incorporation of BII ions.
    Notes: Die Perowskite Ba2MgWO6 bzw. Ba2CaWO6 zeigen mit Ba2Y0,67WO6 vollständige Mischbarkeit. Die in einem kubischen 1:1 geordneten Perowskitigitter kristallisierenden Mischkristalle enthalten mit x steigende Mengen an Kationenfehlstellen (Systeme Ba2B1-xIIY0,67x □0,33xWO6). In Abhängigkeit von den Nachbarschaftsverhältnissen liegen verschiedene Typen an WO6-Oktaedern nebeneinander vor. Die für Ba2Y0,67WO6 charakteristische Umwandlung kubisch → hexagonal wird durch Einbau von BII-Ionen unterdrückt.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19774310114
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  • 7
    Electronic Resource
    Electronic Resource
    Schwingungsspektroskopische Untersuchungen an Perowskitvarianten Ba2B0,67III□0,33MVIO6 und ihren Mischkristallen mit Ba2BIIMVIO6 (1977)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 437 (1977), S. 197-202 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Vibrational Spectroscopic Investigation on Perovskite Type Variants Ba2B0.67III□0.33MVIO6 and their Solid Solutions with Ba2BIIMVIO6In the perovskite typ variants Ba2B0.67III□0.33MVIO6 with MVI = W, U, Te several kinds of MVIO6 octahedra are to distinguish. The study of the solid solutions Ba2B1-xIIY0.67x□0.33xWO6 (BII = Mg, Ca) shows, that in the lattice no more than three different types of WO6 octahedra can be present.
    Notes: Die Perowskitvarianten Ba2B0,67III□0,33MVIO6 mit MVI = W, U, Te enthalten mehrere Sorten an MVIO6-Oktaedern. Aus der Untersuchung der Mischkristallsysteme Ba2B1-xIIY0,67x□0,33xWO6 (BII = Mg, Ca) geht hervor, daß im Gitter nicht mehr als drei verschiedene Typen von WO6-Oktaedern vorhanden sein können.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19774370128
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  • 8
    Electronic Resource
    Electronic Resource
    Über Hexagonale Perowskite mit Kationenfehlstellen. V. Strukturbestimmungen an H—Ba2Lu2/3□1/3 WO6  -  eine neue rhomboedrische Stapelvariante mit 18 Schichten (1979)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 448 (1979), S. 119-125 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On Hexagonal Perovskites with Cationic Vacancies. V. Structure Determination on H—Ba2Lu2/3 □ 1/3WO6  -  a Novel Rhombohedral Stacking Polytype with 18 LayersCompounds of type Ba2B2/3III□1/3WVIO6 with BIII — Gd - Lu, Y are polymorphic They crystallize in a cubic 1:1 ordered perovskite structure and in a new rhombohedral perovskite stacking polytype of 18 L respectively. By intensity calculations out of the three possible stacking sequences (4)(2), (5)(1) and (3)1(1)1 (all space group R3m) the sequence (5)(1) can be selected. For H—Ba2Lu2/3□1/3WO6 the refined R′ factor is 14.1%. The structure contains groups of three octahedra connected with another by common faces which are linked with each other by three corner sharing octahedra. In the block of three face sharing octahedra the central octahedral lattice site is vacant, the two outer positions are occupied by tungsten atoms. According to this distribution a direct contact of occupied face sharing octahedra is absent.
    Notes: Verbindungen vom Typ Ba2B2/3III□1/3WVIO6 sind für BIII = Gd - Lu, Y polymorph. Neben einer kubischen 1 : 1 geordneten Perowskitstruktur kristallisieren sie in einer neuen rhomboedrischen Stapelvariante vom 18 L-Typ. Intensitätsberechnungen zeigen, daß von den drei möglichen Stapelfolgen (4)(2), (5)(1) und (3)1(1)1 (jeweils R.G. R3m) die Abfolge (5)(1) zutrifft. Für H—Ba2Lu2/3□1/3 WO6 beträgt der verfeinerte R′-Faktor 14,1%. Die Struktur besteht aus Dreier blöcken von flächenverknüpften Oktaedern, die untereinander durch drei über Ecken verknüpfte Oktaeder verbunden sind. Die zentrale Oktaedermitte der Dreierblöcke ist nicht besetzt, in den beiden äußeren Oktaederpositionen dieser Gruppierung befinden sich Wolframatome. Ein direkter Kontakt von besetzten flächenverknüpften Oktaedern wird dadurch vermieden.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19794480114
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  • 9
    Electronic Resource
    Electronic Resource
    Über Das System Ba2Gd2/3□1/3U1-xWxO6 sowie hexagonale Perowskite vom 18- (1978)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 439 (1978), S. 250-254 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the System Ba2Gd2/3□1/3U1-xWxO6 and Hexagonal Perovskites of an 18-Layer TypeIn the system Ba2Gd2/3□1/3U1-xWxO6 the formation of a continuous solid solution series is observed. With x ≤ 0.9 the mixed crystals have a cubic 1:1 ordered perovskite structure. With x ≥ 0.95 the compounds are polymorphic: besides an cubic 1:1 ordered perovskite type for x = 0.95; 0.99 and 1.00 one hexagonal layer structure exists. This lattice is in all cases rhombohedral (space group R3m) and represents an 18 L-type. Likewise the compounds Ba2B2/3III□1/3WVIO6 with BIII = Tb-Lu and Y belong to the 18 L-type.
    Notes: Im System Ba2Gd2/3□1/3U1-xWxO6 wird lückenlose Mischbarkeit beobachtet. Für x ≤ 0,9 kristallisieren die Mischkristalle in einem kubischen 1:1 geordneten Perowskitgitter. Für x ≥ 0,95 tritt Polymorphie auf: neben den kubischen 1:1 geordneten Perowskittyp wird mit x = 0,95; 0,99 und 1,00 eine hexagonale Stapelvariante beobachtet. Dieses Gitter ist jeweils rhomboedrisch (Raumgruppe R3m) und stellt eine 18-Schichtenstruktur dar. Die Verbindungen Ba2B2/3III□1/3WVIO6 mit BIII = Tb-Lu und Y besitzen ebenfalls eine 18-Schichtenstruktur.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19784390129
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  • 10
    Electronic Resource
    Electronic Resource
    Über geordnete Perowskite mit Kationenfehlstellen. XI. Das System Ba2Gd2/3□1/3U1-xWxO6 (1982)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 495 (1982), S. 219-231 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On Ordered Perovskites with Cationic Vacancies. XI. System Ba2Gd2/3□1/3U1-xWxO6The cation deficient polymorphic perovskites Ba2Gd2/3□1/3UO6 and Ba2Gd2/3□1/3WO6 form a continuous series of mixed crystals, which crystallize over a wide range (x = 0.1 up to 0.99) in a cubic 1:1 ordered perovskite lattice. According to the investigations of the vibrational spectra, the diffuse reflectance spectra, and the photoluminescence  -  opposite to isostructural perovskites without vacancies  -  different species of UO6 and WO6 octahedra are present. Numerous differences in properties  -  e. g. an orange emission colour in comparison with a green one by absence of vacancies  -  are based upon that.
    Notes: Die beiden fehlstellenhaltigen, polymorphen Perowskite Ba2Gd2/3□1/3UO6 und Ba2Gd2/3□1/3WO6 bilden eine lückenlose Reihe von Mischkristallen, die in einem weiten Bereich (x = 0,1 bis 0,99) in einem kubischen 1:1 geordneten Perowskitgitter kristallisieren. Wie die Untersuchung der Schwingungsspektren, der diffusen Reflexionsspektren und der Photolumineszenz zeigen, liegen  -  im Gegensatz zu isostrukturellen fehlstellenfreien Perowskiten  -  mehrere Sorten an UO6- und WO6-Oktaedern vor. Hierauf sind zahlreiche Eigenschaftsunterschiede  -  z. B. eine orangefarbene Emission im Unterschied zu einer grünen bei Abwesenheit von Fehlstellen  -  zurückzuführen.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19824950123
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