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  • 1990-1994  (3)
  • 1975-1979  (4)
  • 1915-1919  (1)
Materialart
Erscheinungszeitraum
Jahr
  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Bulletin of environmental contamination and toxicology 46 (1991), S. 492-498 
    ISSN: 1432-0800
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik , Medizin
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Skeletal radiology 23 (1994), S. 283-288 
    ISSN: 1432-2161
    Schlagwort(e): Neoplasms ; Bone tumors ; Desmoplastic fibroma
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Desmoplastic fibroma is a rare benign primary bone tumor, histologically identical to the extra-abdominal desmoid tumor of soft tissues. The incidence in major series of bone tumors is 0.1%–0.3%. In the present study 18 cases from the files of the Netherlands Committee on Bone Tumors are reported, with an emphasis on the radiographic features. Eight female and ten male subjects were affected, with a fairly even age distribution from the second to the seventh decade of life. The most frequent sites of involvement were the femur and the pelvis. Radiographically the lesions nearly always demonstrated benign features with respect to pattern of destruction, margins, and reactive bone formation; however, soft tissue extension was sometimes present. Although desmoplastic fibroma usually presents with pain or swelling, in 5 of the 18 cases the existence of the lesion was an accidental finding, and in 2 cases the patient had long-standing, vague complaints of pain. Though overall benign radiographic features may support the final diagnosis, the main and often troublesome histological differential diagnosis is of a low-grade fibrosoma. En bloc resection is the treatment of choice in view of the high incidence of recurrence after curettage.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Springer
    Biological cybernetics 29 (1978), S. 49-55 
    ISSN: 1432-0770
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Informatik , Physik
    Notizen: Abstract Measurements on the auditory perception of subjectively uniform rhythm lead to the concept of the perceptual moment. In accordance with the experimental results, the perceptual moment is a function of the duration of the sound impulse and of its temporal envelope. A model for these functional relations is developed, which consists mainly of a first-order low pass, as it was concluded that the temporal perception of sound impulses is dependent on the transient behavior of the auditory system. The perceptual moment of a sound impulse is defined as the moment at which a certain percentage (16%) of the maximum of the transient is trespassed.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Springer
    Chemistry of natural compounds 12 (1977), S. 696-699 
    ISSN: 1573-8388
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Summary The biosynthesis of the alkaloids ofAmmothamnus lehmannii Bge. have been studied by supplying the plants with [1,5-14C2] cadaverine. It has been shown that cadaverine is a precursor of sophocarpidine, sophocarpine, and pachycarpine. Possible routes of interconversions have been studied by supplying the plants with the tritium-labelled alkaloids [3H] sophocarpine, [3H] matrine, and [3H] pachycarpine.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Springer
    Chemistry of natural compounds 13 (1977), S. 210-212 
    ISSN: 1573-8388
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Summary The biosynthesis of the alkaloids ofAmmodendron karelinii Fisch. et Mey has been studied by feeding the plant with labelled [1,5-14C]cadaverine. It has been shown that cadaverine is a precursor of anagyrine, pachycarpine, ammodendrine, N-methylcytisine, and cytisine. Possible routes of interconversions have been considered by feeding the plant with the tritium-labelled [3H]pachycarpine, [3H]lupanine, [3H]anagyrine, and [3H]ammodendrine.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 333 (1991), S. 85-90 
    ISSN: 0021-8383
    Schlagwort(e): Chemistry ; Organic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Degradation of n-Butylaminocyclohexyl phosphonic Acid di-n-Butylester (Buminafos) in Aqueous Medium.In aqueous medium, breakdown of Buminafos (1) is connected with total loss of its herbicidal activity. The phosphorus-carbon bond is cleaved and n-butylcyclohexylidene amine (3), cyclohexanone (5), phosphoric acid mono-n-butyl ester (4) (partly as n-butylamine salt), and 1-aminocyclohexyl phosphonic acid di-n-butylester (8) were found as degradation products of carbon-14 labeled Buminafos. Identification was performed by MS, GC/MS, 1H- and 31P-n.m.r. spectroscopy, by detection of phosphorus, and by means of the radioactivity.
    Zusätzliches Material: 2 Ill.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 7
    Digitale Medien
    Digitale Medien
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 319 (1977), S. 117-122 
    ISSN: 0021-8383
    Schlagwort(e): Chemistry ; Organic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Beschreibung / Inhaltsverzeichnis: The Preparation of O-Substituted Esters of SugarsIn this paper the syntheses of 14 O-acetylated carbohydrate esters of different acids are described according to a new method. The esters are prepared by reaction of the acids with O-substituted halocarbohydrates, e. g. acetobromoglucose in the presence of amines, e. g. triethylamine. We have synthesized according to this procedure also the 2,3,4,6-tetra-O-acetyl-β-D-glucopyranosylesters of such instable acids like abscisic acid, 3-indoleacetic acid and gibberellic acid in yields of more than 50%.
    Notizen: Es werden die Synthesen von 14 O-acetylierten Zuckerestern verschiedenster Säuren nach einem neuen Verfahren beschrieben. Die Darstellung erfolgt durch Umsetzung der Säuren mit O-substituierten Halogenzuckern, z. B. α-Acetobromglucose in Gegenwart eines Amins, z. B. Triäthylamin. Nach dem Verfahren gelang unter anderem die Darstellung der 2,3,4,6-Tetra-O-acetyl-β-D-glucopyranosylester solch empfindlicher Säuren wie Abscisinsäure, 3-Indolylessigsäure und Gibberellinsäure in Ausbeuten von über 50%.
    Zusätzliches Material: 2 Tab.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 8
    Digitale Medien
    Digitale Medien
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 52 (1919), S. 77-92 
    ISSN: 0365-9631
    Schlagwort(e): Chemistry ; Inorganic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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