Library

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
  • 1960-1964  (11)
  • 1963  (9)
  • 1961  (2)
Source
Material
Years
  • 1960-1964  (11)
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Zum inneren lichtelektrischen Effekt (Quantensprungabsorption) im Alkalimetall Kalium (1963)
    Springer
    The European physical journal 174 (1963), S. 289-295 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The results of new measurements of the optical constantsn andk of the alkali metalK, performed in ultrahigh vacuum on mirrorlike surfaces free of any contamination and distortion in the wavelength region from 0·365 μ to 2 μ at temperatures between −183° C and +85° C permit to separate the absorption due to interband transitions (photoexcitation of valency electrons) from the “classical absorption” solely considered in Drude's theory of the optical constants of metals. Thus, it is possible to determine the “internal photoelectric effect” of the alkali metal potassium as a function of wavelength, espically its threshold frequency which corresponds to a wavelengthλ th=2·1 μ (hν th=0·59 eV).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01381661
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Die optischen Konstanten des Kaliums und die Theorie von Drude (1963)
    Springer
    The European physical journal 174 (1963), S. 280-288 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The results of new measurements of the optical constantsn andk of the alkali metal K, performed in ultrahigh vacuum on mirrorlike surfaces free of any contamination and distortion in the wavelength region from 0·365 μ to 2 μ at temperatures between −183° C and +85° C were compared with the predictions of the Drude-theory. This permits the following main conclusions: 1. The relation forn 2-k 2≡ε (real part of the metal's dielectric constant) derived by Drude proves to be valid; therefore, the total polarisation 4πNα (α=polarizability) of the metal remains small compared with 1 and the interband absorption has no influence on it. 2. The quotientN/m, N beeing the number of conduction electrons andm the electronic mass has been determined, permitting either the calculation of the effective numberN eff of conduction electrons or of the effective optical massm eff,opt. Within the limits of experimental error both quantities prove to be independent of temperature between −183° C and +85° C. 3. The critical wavelengthλ c corresponding to the plasma frequencyν c was found to be equal toλ c=2909 Å (hν c=4·25 eV).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01381660
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Quantensprungabsorption (innerer lichtelektrischer Effekt) im Alkalimetall Kalium (1963)
    Springer
    Naturwissenschaften 50 (1963), S. 437-438 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00601585
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Waldbauliche Beiträge zur genetischen Beurteilung der Lärche (1961)
    Springer
    European journal of forest research 80 (1961), S. 29-48 
    Details
    ISSN: 1612-4677
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Schon frühzeitig führte man die Ursachen des „Lärchensterbens“ neben falscher Standortswahl und Fehlern in der waldbaulichen Behandlung auf den Anbau ungeeigneter Rassen zurück (Baudisch, Herrmann, Münch, Schreiber, Schotte). Aus dem Gedeihen bzw. Versagen der Lärche auf vergleichbaren Standorten bei ähnlicher Mischung und waldbaulicher Behandlung schloß man mit Recht, daß es bestimmte Lärchenherkünfte gibt, die sich für einen Anbau besser eignen als die Masse der verwendeten, aber praktisch versagenden Provenienzen. Gerade die bestandesgeschichtlichen Untersuchungen vonMünch ergaben, daß vor allem in Nord- und Nordostdeutschland gute Anbauergebnisse mit der Sudetenlärche erzielt wurden, während dort die „Alpenlärche“ weitgehend Krebs und Lärchensterben zum Opfer fiel. An anderen Orten hat die so oft für den Mißerfolg verantwortlich gemachte Verwendung von Saatgut aus den Alpen, z. B. älteste Anbauten von Schlitz, zu hervorragenden Ergebnissen geführt. Aus den verschiedenen „Lärchenwellen“ kann nur ganz allgemein auf das Vorhandensein von Ökotypen (Standortsrassen) bei der Lärche geschlossen werden. Zur waldbaulichen Beurteilung der Rassenfrage ist die Beantwortung folgender Fragen wünschenswert: 1. Welche Herkünfte sind waldbaulich zu unterscheiden? 2. Welche Provenienzen wurden bisher angebaut? 3. Wie sind die bisher verwendeten Herkünfte waldbaulich zu beurteilen? 4. Welche Provenienzen sind für einen Anbau auf bestimmten Standorten am besten geeignet?
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01816105
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    III. Buchbesprechungen (1963)
    Springer
    European journal of forest research 82 (1963), S. 311-320 
    Details
    ISSN: 1612-4677
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01819540
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Die Äsung des Gamswildes (1961)
    Springer
    European journal of wildlife research 7 (1961), S. 93-103 
    Details
    ISSN: 1439-0574
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Summary By means of vegetation tests within the scab fence of the Forstamt Ramsau the feed of chamois deer could be analysed in detail. Even in cases of high density of deer population and scarce fundamental feed there is a detailed choice of plants to be noticed. Biting of foliage and fir trees in winter and spring is not inconsiderable from the view point of forest economics, even if the damages caused by feeding red and roe deer are worse. The want of food chamois deer is not to be undervalued. By preference of roe and red deer the living space of chamois deer is quickly restrained. In view of the threatening extension of scab we ought to strive for a strong population of chamois deer restricted in numbers within wide spaced districts provided with very rich fundamental feed stuffs and with only little competence in feed by red and roe deer.
    Abstract: Résumé A l'aide des recherches sur la végétation trouvée dans les treillages pour bêtes galeuses dans le district de Ramsau on vient d'analyser de près la pâture des chamois. On constatait que même quand existait un nombre assez élévé du gibier et quand la base de la pâture était restreinte la choix des plantes était prononcée. Les morsures hivernales et printanières sur arbres à feuilles et épicéas sont du point de vue sylviculture assez importantes quoique les dégâts causés par les bêtes fauves le sont encore d'avantage. Cependant, il ne faut pas sous-évaluer le besoin des chamois en pâture. L'espace vital des chamois est très vite resserré par une trop grande mise en défends des bêtes fauves. Devant la menace d'une extension de la gale il faut faire l'essai d'éléver un état de chamois limité en nombre mais vigoureux et vivant en districts étendus avec une riche base de pâture et petite concurrence pour la pâture par les bêtes fauves.
    Notes: Zusammenfassung Durch Vegetationsuntersuchungen im Räudegatter des Forstamtes Ramsau konnte die Äsung des Gamswildes näher analysiert werden. Selbst bei hoher Wilddichte und knapper Äsungsgrundlage erfolgt eine ausgesprochene Auslese der Pflanzen. Winter- und Frühjahrsverbiß an Laubbäumen und Tanne (Fichte) ist waldbaulich nicht unerheblich, wenngleich Äsungsschäden durch Rot- und Rehwild größer sind. Der nahrungsbedarf des Gamswildes darf nicht unterschätzt werden. Durch Überhege von Rot- und Rehwild wird sehr schnell der Lebensraum des Gamswildes eingeengt. Angesichts der drohenden Ausbreitung der Räude wird ein zahlenmäßig beschränkter, aber kräftiger Gamswildbestand in großräumigen Einständen mit sehr reichlicher Äsungsgrundlage bei geringer Äsungskonkurrenz durch Rot- und Rehwild anzustreben sein.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01956525
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Stereochemische Untersuchungen an den Vitaminen E und K1 (1963)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 75 (1963), S. 1030-1031 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19630752130
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Über die Chemie des Vitamins E. 3. Mitteilung. Die Totalsynthese von (2R, 4′R, 8′R)- und (2S, 4′R, 8′R)-α-Tocopherol (1963)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 46 (1963), S. 650-671 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: (2R, 4′R, 8′R)- and (2S, 4′R, 8′R)-α-tocopherol have been synthesized by WITTIG reaction of the two enantiomeric S-(+)- and R-(-)-6-acetoxy-Z-formyl-2,5,7, 8-tetramethyl-chromans (I) with (3R, 7R)-hexahydrofarnesyl-triphenylphosphonium bromide (II), followed by hydrogenation and hydrolysis. (2R, 4′R, 8′R)-α-tocopherol proved to be identical in every respect with natural so called d-α-tocopherol. Resolution of the chroman component was achieved via the diastereomeric quinine salts of 2-carboxyethynyl-6-hydroxy-2,5,7,8- tetramethyl-chroman (XVIII). followed by transformation of the enantiomers into S-(+)- and R-(-)-I, respectively.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19630460225
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Über die Chemie des Vitamins E. 5. Mitteilung. Die Synthese von rac. all-trans-ζ1- und-∊-TocopherolHerrn Prof. Dr. Th. Posternak zum 60. Geburtstag gewidmet (1963)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 46 (1963), S. 2517-2526 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The synthesis of racemic all-trans-ζ1- (I) and -∊-tocopherol (II) is described. Comparison with the corresponding natural specimens proved the all-trans-configuration of the side chain of ζ1-and ∊-tocopherol isolated from wheat bran.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19630460706
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Über die Chemie des Vitamins E. 1. Mitteilung. Die Umkehrung der Konfiguration am Kohlenstoffatom 2 von natürlichem (2 R, 4′ R, 8′ R)-α-Tocopherol (1963)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 46 (1963), S. 333-343 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: (2 S, 4′R, 8′R)-α-Tocopherol with unnatural configuration at C-2 is prepared by oxidation of natural, so called d-α-tocopherol (I), which has the (2R, 4′R, 8′R)-configuration, to α-tocopherylquinone (II), followed by recyclization of the corresponding α-tocopherylhydroquinone (III). Experiments showed that the configuration of carbon atom 2 of natural α-tocopherol is retained during the ferric chloride oxidation (I →II) and is predominantly inverted by zinc chloride cyclization of α-tocopherylhydroquinone (III).
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19630460134
    Library Location Call Number Volume/Issue/Year 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...