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
  • Chemistry  (7)
  • Atlantis II Deep brines  (1)
  • CR: G1.3  (1)
  • Czech Republic  (1)
  • 1990-1994  (6)
  • 1970-1974  (4)
Collection
Keywords
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    On the monotonity of incomplete factorization (1990)
    Springer
    Numerische Mathematik 57 (1990), S. 473-479 
    Details
    ISSN: 0945-3245
    Keywords: AMS(MOS): 65F10 ; CR: G1.3
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Summary The Meijerink, van der Vorst type incomplete decomposition uses a position set, where the factors must be zero, but their product may differ from the original matrix. The smaller this position set is, the more the product of incomplete factors resembles the original matrix. The aim of this paper is to discuss this type of monotonity. It is shown using the Perron Frobenius theory of nonnegative matrices, that the spectral radius of the iteration matrix is a monotone function of the position set. On the other hand no matrix norm of the iteration matrix depends monotonically on the position set. Comparison is made with the modified incomplete factorization technique.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01386424
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Evidence from zircon dating for existence of approximately 2.1 Ga old crystalline basement in southern Bohemia, Czech Republic (1993)
    Springer
    International journal of earth sciences 82 (1993), S. 42-50 
    Details
    ISSN: 1437-3262
    Keywords: Zircon dating ; Sphene dating ; Bohemian Massif ; Orthogneisses ; Czech Republic
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Zircon ages are reported for three Moldanubian amphibolite grade orthogneisses from the southern Bohemian Massif obtained by conventional U/Pb analyses. For two of these orthogneisses, conventional U/Pb data are supported by ion microprobe single zircon ages or single grain evaporation data. The amphibolite grade orthogneisses, occurring in three small tectonic lenses within the Varied Group close to the South Bohemian Main Thrust, are of tonalitic, granodioritic or quartz dioritic composition. Conventional bulk size fraction and ion microprobe analyses of nearly euhedral zircons from a metatonalite, erroneously interpreted as a metagreywacke in a previous study, yielded an upper Concordia intercept age of 2048 ± 12 Ma. The well preserved euhedral grain shapes of the zircons suggest crystallization from a magmatic phase, and the upper Concordia intercept age is now interpreted as reflecting a magmatic event at that time. The age of this rock is compatible with the conventional zircon data and the (207Pb/206Pb)* single grain evaporation result from two further orthogneisses providing intrusion ages of 2 060 ± 12, 2 104 ± 1 and 2 061 ± 6 Ma, respectively. For one sample a concordant U/Pb age for sphene of 355 ± 2 Ma defines the age of amphibolite facies metamorphism. The upper Concordia intercept ages of three orthogneisses constitute the first direct evidence for the presence of early Proterozoic crust under the supracrustal cover in the southern part of the Bohemian Massif.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00563269
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Flexistipes sinusarabici, a novel genus and species of eubacteria occurring in the Atlantis II Deep brines of the Red Sea (1990)
    Springer
    Archives of microbiology 154 (1990), S. 120-126 
    Details
    ISSN: 1432-072X
    Keywords: Flexistipes ; Eubacteria ; Atlantis II Deep brines ; Red Sea
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Four isolates of a gram-negative flexible bacterium have been obtained from brine water samples of the Atlantis II Deep of the Red Sea at a depth of 2000 m. One isolate (MAS 10) was studied in detail. Cells are nonmotile, flexible rods, measuring about 0.3 μm in width and 5 to 50 μm in length. The new organisms are heterotrophs growing anaerobically on yeast extract, meat extract, peptone, tryptone, and, less efficiently, on acetate and casamino acids. Growth occurs between 30% and 53°C at pH 6 to 8 in the presence of at least 3% NaCl. The shortest doubling time is 8.5 h under optimal growth conditions. Cells are sensitive to the antibiotics penicillin, ampicillin, vancomycin, and streptomycin, but resistant to tetracyclin and rifamipicin. The GC-content of the DNA is 39 mol%. Based on their 16S rRNA the new isolates group with the general cluster of eubacterial phyla. Since they show no specific relationship to any of them, a new genus is described, which is named Flexistipes, the flexible stick. Type species is Flexistipes sinusarabici strain MAS 10 (DSM 4947).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00423320
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Diagnostika Sostava Materialov Rentgenodifrakcionnimi I Spektralnymi Metodami (Identification of materials by X-ray diffraction and spectroscopical Techniques) (in Russian), M. S. Nakhmanson and V. G. Feklitschev, Mashinostroenie, Leningrad, 1990. 357 pages. ISBN 5-217-00915-2, Rubl 5.40 (1991)
    New York, NY : Wiley-Blackwell
    Journal of Chemometrics 5 (1991), S. 546-547 
    Details
    ISSN: 0886-9383
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cem.1180050608
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Nucleophilic Chlorination of 3-Formyl-4-hydroxy-quinolin-2(1H)-ones (1993)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 335 (1993), S. 128-134 
    Details
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Chlorination of 1-substituted 3-formyl-4-hydroxy-2-quinolones (1a, b) with phosphorylchloride leads to 4-chloro-3-dichloromethylquinolones (2), which can be hydrolyzed to 4-chloro-3-formyl-quinolones (4). From the anilinomethylene quinolinediones (3), at low temperatures the formylquinolones 4 can be obtained directly, whereas at high temperatures cleavage of the tautomeric azomethine moiety followed by subsequent ring closure to the naphthyridines (7) takes place. With 1-unsubstituted 3-formyl-4-hydroxy-2-quinolones (1d) either the 3-dichloromethylquinolone (2d) or the 2,4-dichloro-3-dichloro-methylquinoline (10) is obtained depending on the reaction conditions. Similar results are obtained with the 1-unsubstituted anilinomethylene compounds (3). Attempts to obtain the 3-formyl-2,4-dichloroquinoline (11) were unsuccessful because in all experiments the 2-chloro-group was converted to an oxygen function.
    Additional Material: 8 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19933350203
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Umsetzung von benzoesäureglycidylester mit primären und sekundären aminen in alkohol als lösungsmittel (1972)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 154 (1972), S. 81-88 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The reaction course of glycidyl benzoate with aliphatic, aromatic, heterocyclic primary and secondary amines and imidazol in the presence of isobutanol has been studied. The reaction of glycidyl compounds with amines has a termolecular mechanism. In the presence of an alcohol the reaction is pseudobimolecular. The basic dissociation constant of the amine can be applied for the determination of the approximate velocity constant for the reaction of glycidyl benzoate with amines. A greater deviation from the dependence between the dissociation constant of an amine and the velocity constant of the reaction was found with benzylamine. The activation energy of the reaction of glycidyl benzoate with amines has been determined.
    Notes: Die Umsetzung von Benzoesäureglycidylester mit aliphatischen, aromatischen und heterocyclischen primären und sekundären Aminen in Gegenwart von Isobutylalkohol wurde studiert. Die Reaktion der Glycidylverbindungen mit Aminen verläuft nach einem termolekularen Mechanismus. In Alkohol als Lösungsmittel wird ein pseudobimolekularer Reaktionsverlauf ermittelt. Die basische Dissoziationskonstante des Amins kann zur Bestimmung der approximativen Geschwindigkeitskonstante der Benzoesäureglycidylester-Amin-Reaktion verwendet werden. Eine größere Abweichung von der Abhängigkeit zwischen der Dissoziationskonstante des Amins und der Geschwindigkeitskonstante der Umsetzung wurde beim Benzylamin gefunden. Die Aktivierungsenergie für die Reaktion von Benzoesäureglycidylester mit Aminen wurde bestimmt.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1972.021540107
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Benzyldimethylamin-katalysierte Copolyaddition von Benzoesäureglycidylester mit Hexahydrophthalsäureanhydrid (1971)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 20 (1971), S. 103-110 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The benzyl dimethylamine catalyzed copolyaddition of glycidyl benzoate with hexahydrophthalic anhydride has been investigated. The orders of reaction towards hexahydrophthalic anhydride, glycidyl benzoate and benzyl dimethylamine have been determined. The activation energy of the reaction has been determined from the reaction rate constant/temperature dependence. It has been found that the reaction mechanism is strongly influenced by the catalytic amine concentration as well as by the fact that practically all amine is complexed. A reaction mechanism has been suggested.
    Notes: Die mit Benzyldimethylamin katalysierte Copolyaddition von Benzoesäureglycidylester mit Hexahydrophthalsäureanhydrid wurde untersucht. Dazu wurde die Reaktionsordnung für Hexahydrophthalsäureanhydrid, Benzoesäureglycideylester und Benzyldimethylamin bestimmt. Aus der Abhängigkeit der Reaktionsgeschwindigkeitskonstante von der Temperatur wurde die Aktivierungsenergie der Readtion ermittelt. Der Reaktionsmechanismus wird durch die katalytische Konzentration des Amins und durch die Tatsache, daß praktisch das gesamte Amin in Komplexe eingebaut wird, stark beeinflußt. Ein Reaktionsmechanisums wurde entworfen.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1971.050200108
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Reaction of glycidyl benzoate with acid in the presence of tertiary amines as the catalyst (1970)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 12 (1970), S. 157-165 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Es wurde die Umsetzung von Epoxydverbindungen mit Carbonsäuren unter der Katalyse mit tertiären Aminen diskutiert. Auf Grund von experimentellen Resultaten wurde der Reaktionsmechanismus am Beispiel der Umsetzung von Glycidylbenzoat mit Benzoesäure unter der Katalyse durch Benzyldimethylamin in Xylol abgeleitet und bestätigt. Die Umsetzung verläuft nach einem kombinierten Ionenmechanismus und über Komplexbildung. Damit können die abnormale Abhängigkeit der Reaktionskonstante von der Dielektrizitätskonstante des Mediums und die nicht ganzzahligen Ordnungen bezüglich Amin und Säure erklärt werden.
    Notes: The reaction of epoxides with carboxylic acids catalysed by tertiary amines has been discussed. The mechanism of the reaction has been deduced and confirmed, using experimental results, on the example of the reaction of glycidyl benzoate with benzoic acid in xylene, catalysed by benzyldimethylamine. The reaction occurs via a combined ionic mechanism as well as via a complex formation, thus explaining the abnormal dependence of the reaction constant on the dielectric constant of the milieu and the found non-integer orders of reaction with respect to the amine and to the acid.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1970.050120112
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Berechnung der Wärmestrahlung großer Feuer mit dem Ballen-Strahlungsmodell OSRAMO (1991)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 63 (1991), S. 760-761 
    Details
    ISSN: 0009-286X
    Keywords: Poolflammen ; Wärmestrahlungsmodelle ; Absorptionskoeffizienten ; Thermografie ; organisierte Strukturen ; Abbrandgeschwindigkeiten ; Energiebilanzen ; Rußwolken ; brennbare Flüssigkeiten ; Sicherheit ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330630725
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Polymerization of epoxides and episulfides by metal perchloratesMaterial presented at 23rd Annual Meeting of the Chemical Society of Japan, Tokyo, 1970. c.f. Preprint of the Meeting, Vol. 4, p. 2017 (1971)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Letters 9 (1971), S. 225-228 
    Details
    ISSN: 0449-2986
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1971.110090312
    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...