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  • 1990-1994  (3)
  • 1975-1979  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Persistence of the insecticide dimethoate in three different soils under laboratory conditions (1991)
    Springer
    Bulletin of environmental contamination and toxicology 46 (1991), S. 492-498 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01688190
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Desmoplastic fibroma of bone: a report of 18 cases (1994)
    Springer
    Skeletal radiology 23 (1994), S. 283-288 
    Details
    ISSN: 1432-2161
    Keywords: Neoplasms ; Bone tumors ; Desmoplastic fibroma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02412362
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Ein funktionsschema für die wahrnehmung eines gleichmäßigen rhythmus in schallimpulsfolgen (1978)
    Springer
    Biological cybernetics 29 (1978), S. 49-55 
    Details
    ISSN: 1432-0770
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Computer Science , Physics
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00365235
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Biosynthesis and interconversions of alkaloids inAmmothamnus lehmannii (1977)
    Springer
    Chemistry of natural compounds 12 (1977), S. 696-699 
    Details
    ISSN: 1573-8388
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00564962
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Biosyntheis of the alkaloids of Ammodendron karelinii (1977)
    Springer
    Chemistry of natural compounds 13 (1977), S. 210-212 
    Details
    ISSN: 1573-8388
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00563950
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Zerfall von 1-n-Butylaminocyclohexyl-phosphonsäure-di-n-butylester (Buminafos) in wäßrigem Medium (1991)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 333 (1991), S. 85-90 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 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.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19913330118
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Zur Darstellung O-substituierter Zuckerester (1977)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 319 (1977), S. 117-122 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 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%.
    Notes: 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%.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19773190116
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    Paper (German National Licenses)
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