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  • Analytical Chemistry and Spectroscopy  (3)
  • Dinoflagellates  (1)
  • Euglena  (1)
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  • 1
    Digitale Medien
    Digitale Medien
    The microtubular cytoskeleton of three dinoflagellates: an immunofluorescence study (1988)
    Springer
    Protoplasma 144 (1988), S. 68-71 
    Details
    ISSN: 1615-6102
    Schlagwort(e): Amphidinium ; Dinoflagellates ; Cytoskeleton ; Gymnodinium ; Immunofluorescence ; Microtubules
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary The sub-thecal microtubular cytoskeleton of the dinoflagellatesAmphidinium rhynchocephalum, Gymnodinium sanguineum, andGymnodinium. sp has been investigated by indirect immunofluorescence microscopy. In these cells, the majority of cytoskeletal microtubules lie in the anterior-posterior plane. These longitudinal microtubules clearly originate from one of two radially arranged microtubular bands that correspond in location with the anterior and posterior edge of the cingolar depression. Despite the morphological variability of these gymnodinioid dinoflagellates, our data indicate that the microtubular cytoskeleton perfectly reflects the spatial patterning of the epicone and hypocone in each cell.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01320283
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  • 2
    Digitale Medien
    Digitale Medien
    An ultrastructural comparison of the mitotic apparatus, feeding apparatus, flagellar apparatus and cytoskeleton in euglenoids and kinetoplastids (1991)
    Springer
    Protoplasma 164 (1991), S. 91-104 
    Details
    ISSN: 1615-6102
    Schlagwort(e): Bodonid ; Crithidia ; Cytoskeleton ; Cytostome ; Diplonema ; Euglena ; Feeding apparatus ; Flagellar apparatus ; Microtubular root ; Mitosis ; Pellicle ; Rhynchomonas ; Trypanoplasma
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary The euglenoids and kinetoplastids form a diverse assemblage of organisms which show no obvious phylogenetic relationship with other flagellates. An ultrastructural examination and comparison of the flagellar apparatus, the feeding apparatus, and mitotic nucleus indicate a number of shared morphological features which support a common ancestry for the two groups. Of particular interest is the euglenoid,Petalomonas cantuscygni, which shares many of the ultrastructural features common to both groups. Based on the data presented, we hypothesize that a euglenoid with features similar to those now present inP. cantuscygni was ancestral to both the euglenoid and kinetoplastid lines.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01320817
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  • 3
    Digitale Medien
    Digitale Medien
    3,5-diiodotyrosine excretion in human urine in individuals of differing thyroidal status (1983)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 10 (1983), S. 507-511 
    Details
    ISSN: 0306-042X
    Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The urinary excretion of 3,5-diiodotyrosine was determined in euthyroid, hypothyroid and hyperthyroid individuals using a sensitive gas chromatographic mass spectrometric assay. This involved a multi-step extraction of the amino acid from urine (mean efficiency 28±5.7%) then conversion to the N,O -diheptafluorobutyryl methyl ester. The fragmentation of the derivative is discussed. Although the mean excretions in the two pathological states were significantly different from that of euthyroid individuals (P〈0.01 in both instances) there was considerable overlap with the normal range.
    Zusätzliches Material: 2 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bms.1200100906
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  • 4
    Digitale Medien
    Digitale Medien
    Development of a gas chromatographic selected ion monitoring assay for thyroxine (T4) in human serum (1984)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 11 (1984), S. 421-427 
    Details
    ISSN: 0306-042X
    Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The components of a gas chromatographic mass spectrometric-selected ion monitoring (SIM) assay for thyroxine (T4) in human serum are described. The internal standard for the assay was synthesized from deuterium-labelled 3,5-diiodotyrosine and 3,5-diiodo-4-hydroxyphenylpyruvic acid. A novel method was developed for isolating the products of the coupling reaction. The results obtained by gas chromatography mass spectrometry SIM were compared with those of radioimmunoassay. The gas chromatographic mass spectrometric SIM assay would form the basis of a reference assay for T4.
    Zusätzliches Material: 8 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bms.1200110811
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  • 5
    Digitale Medien
    Digitale Medien
    Mass spectral properties of volatile derivatives of thyronine (To) and use of these in the study of thyronine excretion in Eu-, Hyper- and hypothroidism (1984)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 11 (1984), S. 193-198 
    Details
    ISSN: 0306-042X
    Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The mass spectral properties of four classes of derivatives of thyronine are discussed (oxazolidinone, O-methyl oxazolidinone, O-acetyl oxazolidinone and N,O-diheptafluorobutyryl methyl ester). An assay for thyronine in human urine is described based on the N,O-diheptafluorobutyryl methyl ester. Results of To excretion in euthyroid humans were compared with those obtained previously using an assay based on the O-acetyl oxazolidinone derivative. Patients with frank hyperthyroidism had significantly higher To excretion than euthyroid subjects (2α 〈 0.002) and hypothyroid patients lower To excretions than enthyroid subjects (2α 〈 0.002). Some overlap between the two pathological ranges and the normal euthyroid range was evident.
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bms.1200110411
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