Does tenotomy of skeletal muscle alter Z-line width in older animals?

Summary Results of unilateral achilles tenotomy on older (350–410 g) male rats, showed that the general width of Z-lines in the tenotomized muscles was not significantly altered by this procedure. Streaming of the Z-lines and rod formations was still present, as in younger rats.This investigation was supported in part by NIH grants 1-RO1-NS-14033 and 1-T32-07224.     

Coexistence of neoteny and an internal cycle a polystomatid (Monogenea)]

Metapolystoma cachani a parasite of Ptychadena longirostris (Peters) has been discovered in the Ivory coast. Its life cycle is the first to involve both the possibility of an internal cycle in the bladder of the adult Amphibian and a neotenical reproduction on the gills of the Tadpole. This double process is the link between the Monogeneans which are only parasites of aquatic hosts and those which are adapted to terrestrial hosts. Its place is therefore essential in the phylogeny of Polystomatidae.     

Orientation of Giemsa C-bands in interphase cells of Allium cepa L.

Orientation of Giemsa C-bands in Allium cepa was studied in both mitotic and interphase cells. It has been shown that telophase orientation of the chromosome is maintained throughout the interphase and early phophase. It has been assumed that this non-random orientation is due to anchorage of the telomeres with the nuclear membrane. Contrary to earlier observations, 2 by 2 pairing of the telomers could not be traced to this species.     

Degenerative atrophy of central terminals of primary sensory neurons induced by blockade of axoplasmic transport in peripheral nerves

Summary Perineural colchicine- or vinblastine-treatment results in disappearance of non-lysosomal acid phosphatase activity, characterizing axon terminals in the Rolando substance of the normal spinal cord. Ultrastructural alterations are identical with those seen in the course of degenerative atrophy.Supported by research grant No. 4-01-0303-01-1 from the Hungarian Ministry of Health.     

Activité des N-acétyl-glucosaminyl-transférases microsomiques chez les souris BALB/c infectées par le virus de la tumeur mammaire murine (M-MTV)

Summary N-acetyl-glucosaminyl transferase in spleen cells of mice infected with M-MTV is enhanced. This increased synthesis of glycoprotein is not due to synthesis of new enzyme. Such a result suggest that the spleen is implicated in the infecting process.

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Ce travail fait partie d'une thèse de Doctorat ès-sciences préparée sous la direction de Madame le Docteur Jacqueline Mouriquand. Nous remercions le Professeur Pierre Louisot pour ses conseils fructueux dans la conduite de ce travail.     

Structure of an antibody combining site by magnetic resonance.

The structure of the combining site of the DNP binding IgA mouse myeloma protein MOPC 315 has been determined by a combination of high resolution nuclear magnetic resonance, electron spin resonance, model building and chemical modifications. This approach yields that general dimensions of the site, its polarity and asymmetry features, the assignment of the DNP-contact residues and their three-dimensional coordinates.