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  • Organic Chemistry  (3)
  • Corneal curvature  (2)
  • Tuatara  (1)
  • 1990-1994  (2)
  • 1960-1964  (3)
Collection
Keywords
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Focusing and accommodation in the brown kiwi (Apteryx australis) (1992)
    Springer
    Journal of comparative physiology 170 (1992), S. 687-689 
    Details
    ISSN: 1432-1351
    Keywords: Brown kiwi ; Apteryx australis ; Accommodation ; Photorefraction ; Corneal curvature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Brown kiwis are an endangered species of nocturnal, flightless birds which are native to New Zealand. The resting focus of two specimens has previously been studied by retinoscopy in a zoo while the birds were restrained by their keeper (Sivak and Howland 1987). Those birds appeared to be hyperopic (farsighted) by 2–7 D. In this study, examination with infrared photorefraction of the focusing of two unrestrained, feeding birds showed that they could focus objects at infinity and objects in their immediate environment and that they had modest powers of accommodation. Measurements on two 6 month old kiwi chicks showed their corneal radius of curvature to be between 2.90 and 3.00 mm (117 D and 101 D in power).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00198978
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  • 2
    Electronic Resource
    Electronic Resource
    Focusing and accommodation in tuatara (Sphenodon punctatus) (1992)
    Springer
    Journal of comparative physiology 170 (1992), S. 263-266 
    Details
    ISSN: 1432-1351
    Keywords: Tuatara ; Sphenodon punctatus ; Accommodation ; Photorefraction ; Corneal curvature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Photorefraction and photokeratometry were performed on two juvenile tuatara (Sphenodon punctatus, 7 years of age, total length approx. 27 cm). Sphenodon is the only surviving genus of the Rhynchocephalia, an order of reptiles. Both existing species are endangered and are found only in New Zealand. Even though Walls (1942) has stated that the ciliary muscle is relatively weak in tuataras, we observed 8 D of accommodation. The eyes were found to focus independently and we could induce an anisometropia of 6 D. The average corneal power of the tuatara was found to be 101 D.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00191413
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  • 3
    Electronic Resource
    Electronic Resource
    Über die Synthese von Phosphamidon und seinen Abbau in Pflanzen (1961)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 44 (1961), S. 1622-1645 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The synthesis of phosphamidon, a new systemic insecticide, is describcd. By use of the 14C-labeled compound it is shown that in the bean plant phosphamidon undergoes rapid degradation, during which traces of the metabolites desethylphosphamidon,α-chloroacetoaceto-diethylamide, and α-chloroacetoaceto-ethylamide only are detectable. In order to explain the mechanism of the degradation reactions, the behaviour of phosphamidon towards acids and bases has been studied.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19610440621
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  • 4
    Electronic Resource
    Electronic Resource
    Die Bestimmung von Sulfonamiden in biologischem Material Vergleichende Untersuchungen der kolorimetrischen und der radiochemischen Methode an 35S-Sulfaphenazol (1961)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 44 (1961), S. 89-94 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A known colorimetric method for the determination of sulfonamides in biological media has been modified and checked by means of radio-assay using a 35S labelled sulfonamide. Attention is drawn to the loss of sulfonamides during precipitation of proteins. It is shown that an accurate evaluation of results is only possible by using a calibration curve plotted on the basis of relevant recovery experiments.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19610440112
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  • 5
    Electronic Resource
    Electronic Resource
    Eine einfache Methode zur Bestimmung von 35S in biologischem Material (1961)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 44 (1961), S. 84-88 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A simple and rapid method for the radioassay of 35s in organic compounds and biological materials is described. The procedure given for the preparation of the 35S labelled test substances used is generally applicable to the syntheses of labelled sulfonamides and thioureas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19610440111
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