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  • 550 - Earth sciences  (11)
  • Chemistry  (5)
  • Glycomimetics  (1)
  • Heterocycles  (1)
  • 2020-2022
  • 2000-2004  (12)
  • 1950-1954  (2)
  • 1945-1949  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Über die diastereomeren Cycloheptano-2,3-pyrrolidine (1945)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 28 (1945), S. 576-582 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.660280179
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  • 2
    Electronic Resource
    Electronic Resource
    Polyol Peptidomimetics (2000)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 2000 (2000), S. 1113-1120 
    Details
    ISSN: 1434-193X
    Keywords: Peptidomimetics ; Reverse turn mimetics ; Glycomimetics ; Heterocycles ; Lactams ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: -D-Glucurono-3,6-lactone and L-cysteine combine in a highly stereoselective manner to give the 7,5-bicyclic thiazolidinlactam 2. The α-hydroxy group of the D-glucurono-3,6-lactone was exchanged for an amino function (to give 13) and, after condensation with L-cysteine methyl ester, the polyol dipeptide 7 was obtained. Peptide couplings proceed without the need to protect the three secondary hydroxy groups of the seven-membered ring. The amino group of 7 was deprotected and selectively elongated to the pseudo-tripeptide 16. The depsipeptide 17 was obtained by condensation of Boc-Ala-OH with the polyol 2. Elongation at the carboxy terminus yielded 19 and 20. The bicyclic scaffold populates a well-defined solution conformation; the hydroxy groups mimic the side chains of hydrophilic amino acids and can be further functionalized.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Zur polarographischen Reduktion des Rheniums (1950)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 263 (1950), S. 47-62 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die polarographische Reduktion des Rheniums wird in neutralen, alkalischen und sauren Lösungen untersucht. Insgesamt konnten 6 Stromstufen beobachtet werden, die mit Zahlen von 1-6 bezeichnet sind. Die Reduktionspotentiale dieser 6 Stufen, die je nach der Art und Konzentration des Grundelektrolyten Schwankungen unterworfen sind, betragen für die Wellen .Zur Deutung der Wellen wird die Reduktion mit Quecksilber und Zink sowie die Elektrolyse von Kaliumperrhenatlösungen geprüft. In alkalischen, neutralen und sehr schwach sauren Lösungen erhält man die Stufen 1 und 2, entsprechend einem Reduktionsverlauf Bei mittlerer Acidität treten die Stufen 3 und 4 an Stelle von 1 und 2: Die beiden Ionen ReO′4 und Re(VII)Kation stehen miteinander in einem von der Säurekonzentration abhängigen Gleichgewicht. Bei sehr hoher Acidität weisen die Polarogramme 3 Stufen auf und man erhält folgenden Reduktionsverlauf: Analytisch verwertbar sind Stufe 1 aus alkalischer Lösung sowie die Stufen 5 und 6 aus 20 n-Schwefelsäure.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19502630107
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  • 4
    Electronic Resource
    Electronic Resource
    Cycloalkeno-pyridine. (2. Mitteilung). Cyclopentadeceno-2,3-pyridin (1945)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 28 (1945), S. 1677-1684 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.6602801232
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  • 5
    Electronic Resource
    Electronic Resource
    Der Einfluß des Eisens bei der polarographischen Analyse (1952)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 271 (1952), S. 93-100 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Durch Reduktion des dreiwertigen Eisens mit Hydrazinsulfat kann der störende Einfluß großer Fe(III)-mengen bei der polarographischen analyse beseitigt werden. Es ließen sich Cu, Mo, V, Bi, Sb, Cd noch bei Gegenwart eines 500 fachen Eisenüberschusses polarographisch aufnehmen. Die wichtige Stahllegierungselemente Cu, Mo und V konnten nebeneinander bestimmt werden; zum Beleg sind einige Stahlanalysen angeführt. - Eine bisher nicht bekannte Vandinwelle aus schwefelsaurer Lösung wird beschrieben.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19522710114
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  • 6
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    Salinisation of the springs and wells at Lake Kinneret, Israel (part II) (2001)
    In:  Berichte der Deutschen Mineralogischen Gesellschaft : Beihefte zum European Journal of Mineralogy ; 13, 1
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    Publication Date: 2020-02-12
    Keywords: 550 - Earth sciences
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  • 7
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    Comparison of groundwater geochemistry along the Jordan-Dead Sea-Arava transform (2004)
    In:  5th International Symposium on Eastern Mediterranean Geology (Thessaloniki, Greece 2004)
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    Publication Date: 2020-02-12
    Keywords: 550 - Earth sciences
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  • 8
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    Chemical and isotopic characterization of saline groundwater and springs at Lake Kinneret, Israel (2001)
    In:  Berichte der Deutschen Mineralogischen Gesellschaft : Beihefte zum European Journal of Mineralogy ; 13, 1
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    Publication Date: 2020-02-12
    Keywords: 550 - Earth sciences
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  • 9
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    Rare earths and yttrium hydrostratigraphy along the Lake Kinneret-Dead Sea-Arava transform fault, Israel and adjoining territories (2003)
    In:  Applied Geochemistry
    Details
    Publication Date: 2020-02-12
    Description: Rare earth elements and Y (REY) have been analysed in 49 groundwaters from localities in the areas of Lake Kinneret and the Jordan and Arava Valleys. These waters originate from various aquifers and the REY abundances are expected to be controlled by the aquifer rocks. The REY pattern allow one to distinguish interaction of waters with basalts, basalt-limestone interaction zones (silicified limestones), limestones from the Judea and Avdat Groups (Upper Cretaceous and Eocene, respectively), and sandstones of the Lower Cretaceous Kurnub Group. Groundwater from the Quaternary alluvial fill (Dead Sea Group) are either controlled by Judea Group limestone or Kurnub Group sandstone. The REY patterns show characteristic features for each group. In hydrogeological systems, the rocks of natural replenishment areas are usually not the same as rock units from which the waters are collected. This becomes evident by comparing the lithostratigraphic groups from which the waters were collected and the hydrochemical grouping according to REY patterns with their characteristic trends and anomalies. In many cases, there is a correspondence between the lithostratigraphic and the hydrochemical grouping; in other cases, the 2 groupings disagree. This disagreement proves inter-aquifer flow of groundwater. In some cases, the geologically derived aquifers rocks of origin, differ from those indicated by REY patterns. Thus, applying the REY grouping, new fundamental information for hydrological models can be given and sources of salinisation can be elucidated.
    Keywords: 550 - Earth sciences
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  • 10
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    Salinisation of the springs and wells at Lake Kinneret, Israel (part I) (2001)
    In:  Berichte der Deutschen Mineralogischen Gesellschaft : Beihefte zum European Journal of Mineralogy ; 13, 1
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    Publication Date: 2020-02-12
    Keywords: 550 - Earth sciences
    Type: info:eu-repo/semantics/conferenceObject
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