Biomedical subjects
A Kahn
Publications and source records attributed to A Kahn.
Developmental Physiology of Bean Leaf Plastids II. Negative Contrast Electron Microscopy of Tubular Membranes in Prolamellar Bodies.
Proplastids and prolamellar bodies with tubular membranes were isolated from the dark grown primary leaves of bean seedlings (Phaseolus vulgaris L.). The combination of fluorescence microscopy and negative contrast electron microscopy provided the tentative identification of protochlorophyll holochrome as a constituent of prolamellar body membranes and new evidence for solution-filled channels within the tubular membrane systems of prolamellar bodies.
Developmental Physiology of Bean Leaf Plastids III. Tube Transformation and Protochlorophyll (ide) Photoconversion by a Flash Irradiation.
A light flash of about 1 millisecond duration elicits tube transformation in paracrystalline prolamellar bodies as well as maximal protochlorophyll(ide) photoconversion in etiolated bean leaves (Phaseolus vulgaris L.). These findings support a more detailed hypothesis on the linkage between tube transformation and protochlorophyll(ide) photoconversion than has been offered previously.
Characterization of glyoxysomes from castor bean endosperm.
Electron micrographs are presented which establish the identity of the components of the 3 major bands observed after sucrose density centrifugation of the crude particulate fraction from the endosperm of germinating castor bean seedlings. These are: mitochondria (density 1.19 g/cc), proplastids (density 1.23 g/cc) and glyoxysomes (density 1.25 g/cc). Further evidence is provided on the enzymatic composition of the glyoxysomes. Essentially all of the particulate malate synthetase, isocitrate lyase, catalase, and glycolic oxidase is present in these organelles. The distribution of glyoxysomal enzymes on sucrose density gradients is contrasted with that of the strictly mitochondrial enzymes fumarase, NADH oxidase, and succinoxidase. Malate dehydrogenase and citrate synthetase are present in both organelles. The functional role of glyoxysomes and their relationship to cytosomes from other tissues is discussed.
Refsum's disease and a related disorder.
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Bone metabolism, thyrocalcitonin, and parathyroid hormone.
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Physician participation in organized medicine.
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Immune reactions in the kidney.
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Health care: a dilemma.
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Hypertension and neuro-humoral substances.
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[Neurophysiologic control procedures for sterotaxic thalamotomy].
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[The ventral posterior nucleus: an electrophysiological reference point in stereotaxic thalamotomies].
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For a universal school athletic and sport program.
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