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  • Inorganic Chemistry  (5)
  • 3′ End  (1)
  • 1985-1989  (6)
  • 1975-1979
  • 1970-1974
  • 1965-1969
  • 1
    ISSN: 1432-1432
    Keywords: Balbiani rings ; Evolution ; Immunological detection ; Nucleotide sequence ; 3′ End
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Two cDNA clones representing the 3′-end regions of BR1 and BR2 75S mRNA were obtained fromChironomus pallidivittatus. The regular structure characterizing the core of these genes, consisting of tandemly arranged repeat units, changes into a more irregular structure toward the 3′ end. Distal to a standard type of repeat unit with a characteristic excess of positive charges, a new type of repeat with a high, negative charge density is interspersed among parts of the standard unit. The last 111 amino acids before the stop codon represent a unique region distinctly different in amino acid composition from upstream regions, and include two partially homologous hydrophobic regions. Sequence comparison of 3′-end regions from clones representing BR1 and BR2 genes indicates striking sequence conservation in the unique part of the region. Analysis of the level of silent site divergence shows that the homology increases in the 3′ direction up to the polyadenylation site. That the unique region is retained as a part of the secreted protein is shown by Western blotting.
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 556 (1988), S. 189-193 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Triphenyltelluronium Alkoxydes, Xanthates and ThioxanthatesTriphenyltelluronium alkoxydes, xanthates, and thioxanthates of the types (C6H5)3TeOR, (C6H5)3TeS2COR and (C6H5)3TeS2CSR (R = CH3, C2H5, i-C3H7) are obtained by reactions of triphenyltelluronium chloride with the equivalent amounts of sodium alkoxydes, xanthates, thioxanthates.Another method for the synthesis of xanthate compounds is the insertion of CS2 in triphenyltelluronium alkoxydes.
    Notes: Durch Umsetzung von Triphenyltelluroniumchlorid mit stöchiometrischen Mengen an Natriumalkoholaten, -xanthogenaten bzw. -thioxanthogenaten werden Verbindungen der Typen (C6H5)3TeOr, (C6H5)3TeS2COR und (C6H5)3TeS2CSR (R = CH3, C2H5, i-C3H7) erhalten. Ebenfalls führt die Einschiebung von CS2 in Triphenyltelluroniumalkoholate zu Triphenyltelluroniumxanthogenaten.
    Additional Material: 1 Tab.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 525 (1985), S. 127-134 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Tellurium-Dimethyl-bis(alkylxanthates)Tellurium dimethyl-bis(alkylxanthates) of the type R2Te(S2COR′)2 with R = CH3 and R′ = CH3, C2H5, i-C3H7 are obtained by reaction of tellurium dimethyldiiodide with freshly prepared sodium xanthates. Another preparative method is the insertion of CS2 in tellurium dimethylbis(alkoxydes). The X-ray analysis of (CH3)2Te(S2COCH3)2 shows, that in the crystal the molecule has a ψ-pentagonal bipyramidal configuration around tellurium.
    Notes: Man erhält Dimethyl-tellur-bis(alkyxanthogenate) des Typs R2Te(S2COR′)2 mit R = CH3, sowie R′ = CH3, C2H5, i-C3H7 durch Umsetzung von Dimethyltellur-diiodid mit den stöchiometrischen Mengen der jeweiligen Natriumxanthogenate.Ebenfalls führt eine Einschiebung von CS2 in die Te—O-Bindung von Dimethyl-tellur-bis(alkoxyden) zu den Dimethyl-tellur-bis(alkylxanthogenaten). Die Röntgenstrukturanalyse von (CH3)2Te(S2COCH3)2 zeigt, daß das Molekül im Kristall als ψ-pentagonale Bipyramide vorliegt.
    Additional Material: 1 Ill.
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 556 (1988), S. 179-188 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Diorganyltellurium Bis-(dialkylcarbamates) and -(dithiocarbamates)Compounds of the type R2Te(X2CNR′2)2, with R = C6H5, CH3; R′ = CH3, C2H5, i-C3H7, c-C6H11, C6H5, and X = S, are obtained by reaction of dimethyltellurium with tetraorganyl-thiuram-disulfides. Dimethyltellurium diiodide or diphenyltellurium dichloride react with sodium dithiocarbamates or with in situ prepared ammonium dithiocarbamates. Some compounds can be synthesized by reaction of diphenyltellurium oxide with amine in solutions of carbon disulfide. The synthesis of diphenyltellurium- and dimethyltellurium bis-(dimethylcarbamates) results from the interaction of diorganyltellurium diethanolate with dimethylammonium dimethylcarbamate. Decomposition reactions of the compounds in solid and solution are studied 1H-NMR, 13C-NMR, and mass spectroscopically. Diorganyltellurium diethylen-bis-(N,N′-dimethyldithiocarbamates) are obtained by reaction of dimethyltellurium diiodide or diphenyltellurium dichloride and sodium ethylen-bis-(N,N′-dimethyldithiocarbamate) as polymeric products.
    Notes: Die Titelverbindungen vom Typ R2Te(X2CNR′2)2 mit R = C6H5, CH3, R′ = CH3, C2H5, i-C3H7, c-C6H11, C6H5 und X = S können durch Umsetzung von Dimethyltellurid mit den jeweiligen Tetraorganylthiuramdisulfiden, sowie durch Reaktion von Dimethyltellurdiiodid bzw. Diphenyltellurdichlorid mit den entsprechenden Natriumdithiocarbamaten, oder mit intermediär aus Amin und Schwefelkohlenstoff gebildeten Ammoniumsalzen erhalten werden. Des weiteren lassen sich einzelne Verbindungen durch Umsetzung von Diphenyltelluroxyd in Schwefelkohlenstoff mit Dialkylamin synthetisieren.Die Darstellung der Diphenyl- bzw. Dimethyltellur-carbamatverbindungen (R = CH3, C6H5; R′ = CH3; X = O) erfolgt durch Umsetzung von Diorganotellurbis(ethanolat) oder Dimethyl-tellurdiiodid mit Dimethylammoniumdimethylcarbamat.Die Reaktion von Dimethyltellurdiiodid bzw. Diphenyltellurdichlorid mit Natrium-ethylen-bis(N,N′-dimethyldithiocarbamat) führt zu polymeren Produkten.
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 556 (1988), S. 194-198 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Triorganyltelluronium CarboxylatesBy reaction of triphenyltelluronium methoxyd or trimethyltelluronium hydroxyd with carboxylic acid, triorgayltelluronium carboxylates of the type R3TeO2CR′ (R = CH3, C6H5; R′ = CH3, CHCl2, CCl3, C6H5) are obtained.Another preparative method is the reaction of trimethyltelluronium iodide or triphenyltelluronium chloride with silver acetate.
    Notes: Triphenyltelluroniummethanolat bzw. Trimethyltelluroniumhydroxid reagiert mit den entsprechenden Carbonsäuren zu den Titelverbindungen des Typs R3TeO2CR′ (R = CH3C6H5 und R′ = C6H5, CH3, CHCl2, CCl3). Triorganyltelluroniumacetate lassen sich auch durch Umsetzung von Trimethyltelluroniumjodid bzw. Triphenyltelluroniumchlorid mit Silberacetat erhalten.
    Additional Material: 1 Tab.
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 556 (1988), S. 199-203 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Triphenyltelluronium Carbamates and DithiocarbamatesCompounds of the type (C6H5)3TeS2CNR2 with R = CH3, i-C3H7, C6H5 and (C6H5)3TeO2CN(CH3)2 are obtained by reaction of triphenyltelluronium chloride with sodium dithiocarbamates or ammonium carbamate.In the same way ethylene- bis(N,N′-methyldithiocarbamicacid-S,S′-λ4-triphenyltellurylester) was synthesized.(C6H5)3TeO2CN(CH3)2 reacts with CS2 to give (C6H5)3TeS2CN(CH3)2.
    Notes: Durch Umsetzung von Triphenyltelluroniumchlorid mit den entsprechenden Natrium- bzw. Ammoniumsalzen von Dithiocarbaminsäuren bzw. Carbaminsäure erhält man Verbindungen des Typs (C6H5)3TeS2CNR2 (R = CH3, i-C3H7, C6H5), sowie (C6H5)3TeO2CN(CH3)2.Darüberhinaus kann auf diese Weise auch der bifunktionelle Ethylen-bis(N,N′-methyldithio-carbaminsäure-S,S′-λ4-triphenyltellurylester) erhalten werden.Das Triphenyltelluroniumcarbamat läßt sich durch Umsetzung mit CS2 in das entsprechende Dithiocarbamat überführen.
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