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  • 1970-1974  (18)
  • 1973  (5)
  • 1971  (13)
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  • 1970-1974  (18)
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  • 1
    facet.materialart.
    Unknown
    Cambridge : Periodicals Archive Online (PAO)
    History of science. 11:1=11 (1973:Mar.) 1 
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  • 2
    Electronic Resource
    Electronic Resource
    Cambridge : Cambridge University Press
    The @British journal for the history of science 6 (1973), S. 451-452 
    ISSN: 0007-0874
    Source: Cambridge Journals Digital Archives
    Topics: History , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Cambridge : Cambridge University Press
    The @British journal for the history of science 5 (1971), S. 419-420 
    ISSN: 0007-0874
    Source: Cambridge Journals Digital Archives
    Topics: History , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Cambridge : Cambridge University Press
    The @British journal for the history of science 5 (1971), S. 235-257 
    ISSN: 0007-0874
    Source: Cambridge Journals Digital Archives
    Topics: History , Natural Sciences in General
    Notes: In recent years a number of scholars have argued that Faraday's theories of matter and force were founded on concepts which were derived from Boscovich's Theoria Philosophiae Naturalis (1758). The notion that Faraday's ideas display Boscovichean tendencies is not a new one: it was proposed by several of Faraday's immediate successors and has been noted by more recent commentators. Statements of this kind are not implausible as assertions of a general correspondence between Faraday's views on matter, as expressed in the “Speculation touching Electric Conduction and the Nature of Matter” of 1844, and Boscovich's theory of point atomism, but Professor L. Pearce Williams has made much stronger claims for the dependence of Faraday's ideas on Boscovich's theory of matter. Williams' interpretation has been questioned by recent scholarship, and in this paper I wish to advance an alternative interpretation of Faraday's ideas on electricity and the nature of matter.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Cambridge : Cambridge University Press
    The @British journal for the history of science 5 (1971), S. 301-302 
    ISSN: 0007-0874
    Source: Cambridge Journals Digital Archives
    Topics: History , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1436-6215
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Medicine
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    European food research and technology 145 (1971), S. 7-15 
    ISSN: 1438-2385
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Description / Table of Contents: Zusammenfassung Äpfel verschiedener Sorten und Bananen sind während Wachstum und Reifung auf ihren Gehalt an freien Aminosäuren untersucht worden. In den 6 untersuchten Apfelsorten wurden während des Wachstums hauptsächlich Glutamin, Asparaginsäure und Glutaminsäure gebildet (Aufbauphase). Mit fortschreitender Vegetation am Baum werden auch andere Aminosäuren gebildet. Im klimakterischen Reifungsprozeß während der Lagerung der Früchte kommt es bei Äpfeln und Bananen zu starken Schwankungen sowohl des Proteinstickstoffs als auch der freien Aminosäuren (Umbauphase).
    Notes: Summary The free amino-acid content of different varieties of apples and bananas during growth and ripening was investigated. In 6 investigated apple varieties during growth mainly glutamin, aspartic and glutamic acid were found (building-phase). With proceeding vegetation in the tree, other amino acids are formed too. In the climacteric ripening process during storage of the fruits, very strong fluctuations of the protein-nitrogen as well as the free amino-acids occur in apples and bananas (rebuilding-phase).
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    European food research and technology 145 (1971), S. 20-26 
    ISSN: 1438-2385
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Description / Table of Contents: Zusammenfassung In einer größeren Zahl frischer deutscher Gemüsearten wurde der Gehalt an einzelnen Hydroxyzimtsäuren (p-Cumarsäure, Ferulasäure, Kaffeesäure) festgestellt. Diese Säuren kommen nicht frei, sondern in gebundener Form in recht unterschiedlichen Mengen — meist unter 10 mg/100 g — vor. Nur in Kopfsalat, Endivien, Feldsalat und Möhrenblättern wurden über etwa 50 mg Kaffeesäure/100 g aufgefunden. Sinapinsäure war nur in den Kohlarten enthalten. Weiter wurde der Einfluß der Lagerung bei Möhren und Kartoffeln sowie bei Spinat, Möhren und Sellerie in Dosen/Gläsern auf die Hydroxyzimtsäuren geprüft. Hitzekonservierung und Tiefgefrieren scheinen ohne wesentlichen Einfluß zu sein.
    Notes: Summary Most of the species of fresh German vegetables have been investigated for the concentrations of the hydroxycinnamic acids (p-coumaric, ferulic, caffeic acid). These acids do not occur in free, but in a bond form in very different quantities — mostly less than 10 mg/100 g. Only in lettuce, endive, cornsalad and leaves of carrots we have found more than about 50 mg caffeic acid/100 g. Sinapic acid was found in the cabbage-subspecies(Brassica oleracea) only. Further on we studied the influence of storage on the hydroxycinnamic acids in stored carrots and potatoes and also in canned spinach, carrots and celery roots. Heat sterilization and freezing seem to be without distinct influence on the hydroxycinnamic acids and their concentration.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    European food research and technology 145 (1971), S. 15-19 
    ISSN: 1438-2385
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Description / Table of Contents: Zusammenfassung Zur Prüfung der in Äpfeln verschiedener Reifestadien möglichen Transaminierungsreaktionen wurden Frischextrakten und Enzymlösungen aus Acetontrockenpulvern verschiedene α-Keto-Säuren zugesetzt, nach 3 Std mit Methanol inhibiert und die freien Aminosäuren bestimmt. Das Ausmaß der Transaminierungen entspricht der Zunahme der korrespondierenden Aminosäuren. In Frischextrakten, die nach verschiedenen Reaktionszeiten inhibiert werden, erkennt man den Umfang von Transaminierungen ohne Zusätze.
    Notes: Summary In order to test the transaminase-reactions possible during ripening of apples, several α-keto-acids were added to fresh extracts and enzyme solutions from aceton-dry-powders; after 3 hours they were inhibited by methanol and the free amino acids were determined. The extent of transamination corresponds with the increase of the amino-acids. In fresh extracts, which were inhibited after different reaction times, one can recognize the extent of transamination without additives.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1438-2385
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Description / Table of Contents: Zusammenfassung Mittels Gelchromatographie von Ammoniumsulfatpräparaten aus Hafer und Sojabohnen wurden jeweils zwei Proteinfraktionen mit gemeinsamer Lipoxygenase- und Linolsäurehydroperoxid-Abbau-Aktivität erhalten. Beide Enzymkomplexe (I u. II) unterscheiden sich mit 〉 250000 (I) und 100000 (II) in ihrem Molekulargewicht. Das Aktivitätsverhältnis Lipoxygenase zu “Lipoperoxidase” in II lag für Hafer und Sojabohnen in der Größenordnung von 30:1. Bei der isoelektrischen Fokussierung von II traten nach substratspezifischer Anfärbung bei Sojabohnen vier Banden im pH-Bereich von 5,65-5,80, bei Hafer eine Bande bei einem isoelektrischen Punkt von 5,70 auf. Das Vorliegen eines bifunktionellen Lipoxygenase- „Lipoperoxidase” Komplexes wird diskutiert.
    Notes: Summary By means of gelchromatography of ammoniumsulfate precipitations from oats and soybeans two fractions (I + II) of protein were obtained. Both fractions proved to have a lipoxygenase and a linoleic acid hydroperoxide activity. The enzyme complexes differ in their molecular weights of 〉250000 (I) and 100000 (II). The lipoxygenase/„lipoperoxidase” ratio of activity in II was of the order of 30:1. By substrate specific coloring and isoelectric focusing fraction II of soybeans displayed four bands in a pH-range of 5,65–5,80, which differ from oats where only one band at an isoelectric point of 5,70 was observed. An interpretation in terms of a bifunctional lipoxygenase-lipoperoxidase complex is given.
    Type of Medium: Electronic Resource
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