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Biofiisica the present work it was verified that the E. 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. The prokaryotes henenie an interesting group of microorganisms, which can be used as instruments of scientific investigation. Morphological and physiological alterations occurred in Escherichia coli E.

Inhibition of impulse activity in biofisixa sensory neuron by an electrogenic pump. A model illustrating some aspects of muscle spindle physiology. La Lettre des Neuros- ciences. The cells were then centrifugated rpm15 minutes and resuspended ibofisica solution of NaCl 0. After the irradiation the cells were submitted to a series of biochemical tests. Analysis of impulse adaptation in motoneurons. Action po- tential duration restitution portraits of mamma- lian ventricular myocytes: Understanding the nervous system: A brief history of myelinated nerve fi- bers: Spontaneous fluctua- tions of excitability in the muscle spindle of the frog.


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]. The ionizing and not ionizing radiations can cause mutations through direct or indirect action on the cellular surface.

Calaméo – Livro Biofísica Básica – Ibrahim Felippe Heneine

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]. Eur J Translat Myology. Figure 1 shows the plot of the survival fraction versus the exposition time to the UVc beam, while Fig. Curso Superior de Tecnologia em Radiologia.

This can be explained by the fact that they possess intrinsic properties, such as reduced time of generation and relatively low cost of culture and maintenance [1], [2]. Some mutations are undesirable and even lethal, however, some can be interesting for the survival of a species [1], [2], [4].

A cellular survival curve versus exposition time and absorbed dose was built for each case. Vogues-Proskauer, Indol production, descaboxilation of L-lisina, glucose fermentation, lactose fermentation, rhamnose fermentation, urea hydrolysis, H 2 S production, citrate and ornitine [3], [5].


Principles of electric circuits, electron flow version. This solution was used to make the dilutions of which 0.


Enviado por Gabriel flag Denunciar. Coli cells elongated after irradiation with UVc as well as with proton beam. In the Gram-stain the E. Services on Demand Journal. It is biofisca important biotechnological tool, which makes it possible to obtain important parameters for the metabolic and genetic characterization of cells of more complex organisms. Time course and properties of late adaptation in spinal motoneurones of the cat.

Brokensha G, Westbury DR. Adaptation of the dis- charge of frog muscle spindles following a stretch. The microscopical studies showed that the E. Measurement and nature of firing rate adaptation in turtle spinal neurons.

Resistance in cell membrane and nerve fiber. The components of mem- brane conductance in the giant axon of Loligo. Coli cells lost some basic biochemical properties when the received doses were in the range of 0.

By microscopic observations it was noticed that the E. Deutsch S, Deutsch A. With the experiments described above it was possible to conclude that: Be- haviour of human motor units in different muscles during linearly varying contractions. Evaluation of Escherichia coli cells jeneine induced by ultraviolet and proton beam radiation.