ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • FLUID MECHANICS AND HEAT TRANSFER  (59)
  • Inorganic Chemistry  (48)
  • 2020-2024
  • 1985-1989  (96)
  • 1955-1959  (11)
  • 1988  (96)
  • 1957  (11)
Collection
Keywords
Publisher
Years
  • 2020-2024
  • 1985-1989  (96)
  • 1955-1959  (11)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Untersuchungen an oxidischen Katalysatoren. XLVI. Synthetische Boroalumosilicate mit Pentasilstruktur (SABO): Strukturelle, oberflächenchemische und katalytische EigenschaftenProfessor Ch. M. Minačew zum 80. Geburtstage am 24. Dezember 1988 gewidmet (1988)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 566 (1988), S. 39-48 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Studies on Oxide Catalysts. XLVI. Synthetic Boroaluminosilicates with Pentasil Structure (SABO): Structural, Surface Chemical, and Catalytical PropertiesA remarkable modification of ZSM-5 type zeolites is possible by isomorphous substitution of silicon and/or aluminium by boron. In the H-forms of these SABO zeolites the boron atoms mainly exist in a trigonal lattice oxygen environment and hence they are not envolved in the formation of Broensted acid sites. Consequences of incorporated boron for catalytic reactions result from a decrease in the strength of existing Broensted sites as well as from a partial lattice contraction.
    Notes: Eine bemerkenswerte Modifizierung von Zeolithen des ZSM-5-Typs gelingt auf dem Wege der isomorphen Substitution von Silicium und/oder Aluminium durch Bor. In den H-Formen derartiger SABO-Zeolithe liegt Bor bevorzugt in trigonaler Gittersauerstoffkoordination vor und ist 30mit an der Bildung von Brönsted-Säurezentren nicht beteiligt. Konsequenzen eines isomorphen Boreinbaus für katalytische Reaktionen ergeben sich im wesentlichen aus einer Verringerung der Stärke vorhandener Brönsted-Zentren sowie aus einer mehr oder weniger starken Gitterkontraktion.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19885660106
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Ein Fehlstellenüberstruktur-Modell für γ-Fe2O3 (1957)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 293 (1957), S. 228-232 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Auf Grund magnetischer und röntgenographischer Untersuchungen wird eine Fehlstellenüberstruktur für □-Fe2O3 entwickelt. Bei kubischer Symmetrie, Raumgruppe P43m, Td1, ist ein Eisen(III)-ion auf ½½½ von 4 Leerstellen auf Oktaederplätzen umgeben. Mit einem halben Mol Konstitutionswasser pro Elementarzelle ergibt sich die Formel Fe83+ [Fe123+ □ 4] Fe3+ (OH)-O312-.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19572930310
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Crystal structure of nickel selenide - Ni3Se2 (1957)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 289 (1957), S. 203-206 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The crystal structure of Ni3Se2 has been determined from the X-ray powder diffraction pattern. The unit cell is rhombohedral with a = 4.24 Å, α = 90°38.6′, Z = 1, and space group R 32, D37. The observed and calculated intensities agree for the following arrangement - 2 Se at \documentclass{article}\pagestyle{empty}\begin{document}$ \frac{1}{4}\frac{1}{4}\frac{1}{4},\,\frac{3}{4}\frac{3}{4}\frac{3}{4} $\end{document} and 3 Ni at \documentclass{article}\pagestyle{empty}\begin{document}$ \frac{1}{2}\frac{1}{4}\frac{3}{4},\,\frac{3}{4}\frac{1}{2}\frac{1}{4},\,\frac{1}{4}\frac{3}{4}\frac{1}{2} $\end{document}.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19572890117
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    facet.materialart.
    Unknown
    A numerical study of bifurcations in a barotropic shear flow (1988)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: In the last few years, more and more evidence has emerged suggesting that transition to turbulence may be viewed as a succession of bifurcations to deterministic chaos. Most experimental and numerical observations have been restricted to Rayleigh-Benard convection and Taylor-Couette flow between concentric cylinders. An attempt is made to accurately describe the bifurcation sequence leading to chaos in a 2-D temporal free shear layer on the beta-plane. The beta-plane is a locally Cartesian reduction of the equations describing the dynamicss of a shallow layer of fluid on a rotating spherical planet. It is a valid model for large scale flows of interest in meteorology and oceanography.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: Studying Turbulence Using Numerical Simulation Databases, 2. Proceedings of the 1988 Summer Program; p 41-47
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 5
    facet.materialart.
    Unknown
    On the interaction of Tollmien-Schlichting waves in axisymmetric supersonic flows (1988)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Two-dimensional lower branch Tollmien-Schlichting waves described by triple-deck theory are always stable for planar supersonic flows. The possible occurrence of axisymmetric unstable modes in the supersonic flow around an axisymmetric body is investigated. In particular flows around bodies with typical radii comparable with the thickness of the upper deck are considered. It is shown that such unstable modes exist below a critical nondimensional radius of the body a sub 0. At values of the radius above a sub 0 all the modes are stable while if unstable modes exist they are found to occur in pairs. The interaction of these modes in the nonlinear regime is investigated using a weakly nonlinear approach and it is found that, dependent on the frequencies of the imposed Tollmien-Schlichting waves, either of the modes can be set up.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: NASA-CR-181619 , ICASE-88-10 , NAS 1.26:181619
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 6
    Electronic Resource
    Electronic Resource
    Untersuchungen zur Chemie von Isoindolen und Isoindoleninen, XXVII. 2-Alkyl-2H-dibenz[e,g]isoindole: Synthese, Eigenschaften, Reaktionen (1988)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 121 (1988), S. 81-87 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Studies on the Chemistry of Isoindoles and Isoindolenines, XXVII. - 2-Alkyl-2H-dibenz[e,g]isoindoles; Synthesis, Properties, ReactionsThe tetracyclic hetarenes 6 are easily accessible via the N-oxide route starting with 9,10-bis(bromomethyl)phenanthrene (3) in a three-step procedure. The twofold annelation reduces the diene reactivity of the central 2H-isoindole system. Cycloaddition occurs as well with activated alkynes as with arynes. The hetarenes 6 can be protonated with trifluoroacetic acid and substituted by reaction with arenediazonium tetrafluoroborates.
    Notes: Die tetracyclischen Hetarene 6 sind nach dem N-Oxid-Verfahren einfach aus 9,10-Bis(brommethyl)phenanthren (3) präparativ dreistufig zugänglich. Durch die zweifache Anellierung wird die Reaktivität des zentralen 2H-Isoindol-Systems abgeschwächt. Cycloaddition tritt sowohl mit aktivierten Alkinen als auch mit Arinen ein. Die Hetarene 6 sind mit Trifluoressigsäure protonierbar und durch SE-Reaktion mit Arendiazonium-tetrafluoroboraten substituierbar.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19881210113
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Untersuchungen zur Chemie von Isoindolen und Isoindoleninen, XXVIII. 3-Alkoxy-1H-isoindole  -  Synthesen und Eigenschaften (1988)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 121 (1988), S. 243-252 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Studies on the Chemistry of Isoindoles and Isoindolenines, XXVIII.  -  3-Alkoxy-1H-isoindoles, Syntheses and Properties3-Alkoxy-1H-isoindoles 1 bearing substituents at the carbocyclic moiety have been synthesized from substituted 2,3-dihydro-1H-isoindol-1-ones 4 by regiospecific O-alkylation to 5 with trialkyloxonium tetrafluoroborates or methyl trifluoromethanesulfonate and subsequent NH deprotonation. According to the spectroscopic properties the semicyclic alkyl imidates 1 exist exclusively in the benzenoid 1H structure; the tautomeric o-quinonoid 2H structure 2 cannot be detected by spectroscopic means.
    Notes: 3-Alkoxy-1H-isoindole 1 mit Substituenten am carbocyclischen Teil wurden aus substituierten 2,3-Dihydro-1H-isoindol-1-onen 4 durch regiospezifische O-Alkylierung mit Trialkyloxonium-tetrafluoroboraten oder Trifluormethansulfonsäure-methylester zu 5 und nachfolgende NH-Deprotonierung synthetisiert. Aufgrund der spektroskopischen Befunde existieren die semicyclischen Imidsäure-alkylester 1 ausschließlich in der benzoiden 1H-Form; die tautomere 2H-Form 2 mit o-chinoider Struktur ist spektroskopisch nicht nachweisbar.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19881210209
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Untersuchungen zur Chemie von Isoindolen und Isoindoleninen, XXIX. Reaktionen des 2H-Isoindols mit Maleinimiden: Ein einfaches Herstellungsverfahren für 7-Azabicyclo[2.2.1]heptene (1988)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 121 (1988), S. 927-934 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Studies on the Chemistry of Isoindoles and Isoindolenines, XXIX.  -  Reactions of 2H-Isoindole with Maleic Imides: A Simple Procedure for the Preparation of 7-Azabicyclo [2.2.1]heptenesSolutions of 2H-isoindole 1 in ether were prepared by a simple procedure and treated with maleic imides 2. 1,3-Cycloaddition reactions lead to the formation of 1:1 adducts 3 with an 7-azabicyclo[2.2.1]heptene frame. The endo isomers 3.1 can thermally be isomerized to the more stable exo isomers 3.2. The constitution and configuration of the 1:1 cycloadducts 3 are established by 1H- and 13C-NMR spectroscopy.
    Notes: Lösungen des 2H-Isoindols 1 in Ether werden nach einem einfachen Verfahren hergestellt und mit Maleinimiden 2 umgesetzt. 1,3-Cycloadditionsreaktionen führen zu 1:1-Addukten 3 mit der Struktur von 7-Azabicyclo[2.2.1]heptenen. Die endo-Isomeren 3.1 lassen sich thermisch in die stabileren exo-Isomeren 3.2 umlagern. Konstitution und Konfiguration der 1:1-Cycloaddukte 3 werden durch die 1H- und 13C-NMR-Spektren begründet.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19881210517
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Untersuchungen zur Chemie von Isoindolen und Isoindoleninen, XXXI. 4,5,6,7-Tetrachlor- und 4,5,6,7-Tetrabrom-2H-isoindol (1988)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 121 (1988), S. 1827-1832 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Studies on the Chemistry of Isoindoles and Isoindolenines, XXXI. 4,5,6,7-Tetrachloro- and 4,5,6,7-Tetrabromo-2H-isoindolesThe crystalline 2H-isoindoles 4b are synthesized starting with substituted 2-methylsulfonyl-2,3-dihydro-1H-isoindoles 3 by base-induced elimination of methanesulfinic acid. Compared with the parent compound, a considerable thermal stabilization and chemical deactivation is caused by the halogen atoms at the carbocyclic system. The spectroscopic properties of the o-quinonoid hetarenes 4b have been investigated.
    Notes: Die kristallinen 2H-Isoindole 4b werden aus substituierten 2-Methylsulfonyl-2,3-dihydro-1H-isoindolen 3 durch Basen-induzierte Eliminierung von Methansulfinsäure synthetisiert. Die Halogenatome am carbocyclischen System bewirken - verglichen mit dem Grundkörper - eine beträchtliche thermische Stabilisierung und chemische Desaktivierung. Die spektroskopischen Eigenschaften der o-chinoiden Hetarene 4b wurden untersucht.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19881211022
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    2,3-Dihydro-2,3-bismethylenbenzo[b]thiophen, ein anelliertes reaktives Dien (1988)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 121 (1988), S. 1203-1205 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 2,3-Dihydro-2,3-bismethylenebenzo[b]thiophene, a Reactive Annellated DieneThe cis configurated annellated diene 4 is generated in solution by the reaction of the easily accessible 2,3-bis(bromomethyl)-benzo[b]thiophene (3) with sodium iodide. In the presence of CC or NN dienophiles [4+2] cycloaddition reaction take place and lead to 5, 6, 11, and 12 with acceptable yields. This annellation method is useful for the synthesis of polycyclic compounds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19881210629
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...