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Extended work has been performed worldwide on the effects of mobile phone radiation upon rats' cognitive functions, however there is great controversy to the existence or not of deficits. The present work has been designed in order to test the effects of mobile phone radiation on spatial learning and memory in mice Mus musculus Balb/c using the Morris water(More)
The ancestor of recent vertebrate teeth was a tooth-like structure on the outer body surface of jawless fishes. Over the course of 500,000,000 years of evolution, many of those structures migrated into the mouth cavity. In addition, the total number of teeth per dentition generally decreased and teeth morphological complexity increased. Teeth form mainly on(More)
This review presents a brief account of the most significant biological effects and clinical applications of botulinum neurotoxins, in a way comprehensive even for casual readers who are not familiar with the subject. The most toxic known substances in botulinum neurotoxins are polypeptides naturally synthesized by bacteria of the genus Clostridium. These(More)
Oxytocin is a nine amino acid peptide involved in a wide spectrum of physiological functions; predominantly those concerning reproduction and differentiation are of interest. Oxytocin receptors are expressed at early developmental stages of mammals, suggesting that oxytocin might be involved in the determination of the germ stem cell line, at the very early(More)
The relationship between urodele regeneration and possible regeneration in mammalian prospects is hard to evidence, but the idea of possible regeneration of neural elements in people is an area of potential clinical importance that is under investigation. One of the great challenges of the future is to understand enough about the basic biology of animal(More)
The source of the cells which form the spinal ganglia within the regenerating urodele tail is not yet indisputably known. Classical and modern experimental approaches trace the spinal cord as the most probable source. The aim of the present study was to further investigate this item by conventional histology, counting of mitotic figures, and estimating the(More)
The aim of this investigation was to analyze the effect of urodele limb amputation and blastema growth on the protein synthesis in spinal cord and spinal ganglia neurons corresponding to the 3rd and 4th spinal segment of young, postmetamorphic Triturus vulgaris, in vivo. Protein synthesis was studied on both trunk sides as a function of right forelimb(More)
The effects of vitamin A on blastemal epidermis were studied during the early postamputational period of forelimb regeneration in Triturus alpestris. Vitamin A was administered through oral intubation at a dose of 250 IU per gram of body weight per day. The results were evaluated by morphometry, histology, and autoradiography. After 7, 11 and 14 days of(More)
After amputation of both forelimb of young, postmetamorphic Triturus alpestris through the middle of the zeugopod, the left and right regenerates grew asynchronously. As a result of oral administration of vitamin A palmitate (250 IU/gbw/day), from the 4th to the 13th dpa, the growth rate of the right regenerates was relatively higher than that of the left(More)
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