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Services on Demand Journal. Curso Superior de Tecnologia em Radiologia. With the experiments described above it was possible to conclude that: The biochemical test carried out was the following: Analysis of impulse adaptation in motoneurons.

Spontaneous fluctua- tions of excitability in the muscle spindle of the frog. Coli cells lost some basic biochemical properties when the received doses were in the range of 0.

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The induction of N-methyl-D-aspar- tate receptor-dependent long-term potentiation. A cellular survival curve versus exposition time and absorbed dose was built for each case. For each of the radiation types UVc and protons a survival curve that relates the survival fraction with the exposition time or the absorbed dose by the cells was made [4], [5].

At the present work possible transformations on E. It was observed that the E. Motoneurone properties and motor fatigue. Brokensha G, Westbury DR. This antibiotic intervenes in the synthesis of the peptidoglycan of the cell’s wall, resulting in the incapacity of the cell to divide, without provoking its death [8].

La Lettre des Neuros- ciences. Some mutations are bjofisica and even lethal, however, some can be interesting for the survival of a species [1], [2], [4]. Coli cells elongated after irradiation with UVc as well as with proton beam.


After the irradiation the cells were submitted to a series of biochemical tests. The prokaryotes compose an interesting group of microorganisms, which can be used as instruments of scientific investigation. The concept biovisica hormesis radiation is normally applied to radiation doses in the range of 1 to 50 Gywhich means, radiation doses that instead of provoking irreparable damage that would lead to cellular death, would provoke a radioadaptative response henenie would benefit the cell and its descendant biofusica, [10].

This can be explained by the fact that they possess intrinsic heneinf, such as reduced time of generation and relatively low cost of culture and maintenance [1], [2]. Inhibition of impulse activity in a sensory neuron by an electrogenic pump. The microscopical studies showed that the E. Action po- tential duration restitution portraits of mamma- lian ventricular biofisics The occurrence of morpho-physiologic alterations in the cells of E.

Adaptation of the dis- charge of frog muscle spindles following a stretch. Eur J Translat Myology. Deutsch S, Deutsch A. The radiated cells were then submitted to biochemical tests and also to microscopic analysis Gram-stain in optical microscope magnification of x.

Energy-efficient action po- tentials in hippocampal mossy fibers. By microscopic observations it was noticed that the E. In the literature the elongation phenomenon of E.

The existence of the so called hormesis phenomenon is also registered, with stimulated or benefic effect, induced by low doses of a radioactive agent. A quantita- tive description of membrane currents in rabbit my- elinated nerve. Morphological and physiological alterations occurred in Escherichia coli E. Time course and properties of late adaptation in spinal motoneurones of the cat.

It is an important biotechnological tool, which makes it possible to obtain important parameters for the metabolic and genetic characterization of cells of more complex organisms. The cells were then centrifugated rpm15 minutes and resuspended in solution of NaCl 0. Components of re- ceptor adaptation in a Pacinian corpuscle. How to cite this article.



For the irradiation with UVc radiation a dilution of 1: This solution was used to make the dilutions of which 0. Measurement and nature of firing rate adaptation in turtle spinal neurons. The tests should be rechecked and it would perhaps be necessary to increase the corpuscular radiation dose proton beams applied biofisicw the E.

A model illustrating some aspects of muscle spindle physiology. In the present work it was verified that the E. Behavioral modulation of tactile responses in the rat somatosensory sys- tem. This can be provoked by UVc radiation that induces the formation of pyrimidine dimers in the cellular DNA or by beams of protons it can dislocate electrons of the atoms and create highly reactive ions that can attack biomolecular constituents of the cell, including the DNA [4], [5].

Figure 1 shows the plot of the survival fraction versus the exposition time to the UVc beam, while Fig. Motor-unit discharge rates in maximal voluntary con- tractions of three human biofiisica. All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License. Loewenstein WR, Mendelson M. Understanding the nervous system: The Petri plates triplicate which contain the microorganisms in Agar MacConkey were irradiated [3], [5]For ultra violet radiation, an exposition time of 3 to 15 seconds was used in a laminar flow chamber.

Evaluation of Escherichia coli cells damages induced by ultraviolet and proton beam radiation. The Escherichia coli E.