Peter Arni

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  • Peter Arni
  • Zeitschrift für Morphologie der Tiere
  • 2004
The ultrastructure of the adult digestive gland of Lymnaea stagnalis is described with references to light-microscopic observations. In the epithelium of the gland there are 6 different kinds of cells termed A, B, C, D, E, and F cells; mucous cells have rarely been observed. A cells: They are undifferentiated and represent precursors of other cells in the(More)
Various aneugens were reported to induce structural chromosomal aberrations beside their influence on cell division and their aneugenic potential To asses, whether a relationship between disturbance of cell division and clastogenic potential exists, CHO cells were treated with the well-known aneugens colcemid, colchicine and vincristine and investigated for(More)
Different variants of the comet assay were used to study the genotoxic and cytotoxic properties of the following eight compounds: chloral hydrate, colchicine, hydroquinone, DL-menthol, mitomycin C, sodium iodoacetate, thimerosal and valinomycin. Colchicine, mitomycin C, sodium iodoacetate and thimerosal induced genotoxic effects. The other compounds were(More)
1. O-Acetylated 4-O-methylglucuronoxylans were isolated from sweet chestnut and wych elm, either green or incubated at 48 degrees and 100% relative humidity for 36 weeks. 2. The chlorine-ethanolamine method of delignification resulted in a 50% loss of O-acetyl groups from green wych elm compared with an 18% loss from green sweet chestnut. 3. The(More)
1. O-Acetylated polysaccharides were obtained from green wood of both sweet chestnut and wych elm by treatment of the residue remaining after dimethyl sulphoxide extraction with water at 98 degrees . This gives a mixture of polysaccharides containing xylose, galactose, glucose and uronic acids. Analysis of these and their fractionated products suggest that(More)
  • Peter Arni
  • Zeitschrift für Morphologie der Tiere
  • 2004
Different embryonic and postembryonic stages of capsular fluid containing cells of the midgut region in Lymnaea stagnalis L. are described. These cells arise from the archenteron and take up a great quantity of capsular fluid in a large vacuole. At hatching the diameter of the cells mesures 160-200 μ. In opposition to the opinion of Cumin (1972) these(More)
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