HENEINE BIOFISICA PDF

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Morphological and physiological alterations occurred in Escherichia coli 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. Marini M, Veicsteinas A. The prokaryotes compose an interesting group of microorganisms, which can be used as instruments of scientific investigation.

The exercised skeletal mus- cle: Changes in motoneurone firing rates during sustained maximal voluntary contractions. By microscopic observations it was noticed that the E. This solution was used to make the dilutions of which 0. The components of mem- brane conductance in the giant axon of Loligo.

Adaptation of cat moto- neurons to sustained and intermittent extracellular activation. In the Gram-stain the E. Energy-efficient action po- tentials in hippocampal mossy fibers. Prokaryote cells were exposed to ultra violet UVc radiation and to proton beams in order for the induced effects to be studied.

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Resistance in cell membrane and nerve fiber. The induction of N-methyl-D-aspar- tate receptor-dependent long-term potentiation.

Calaméo – Livro Biofísica Básica – Ibrahim Felippe Heneine

A cellular survival curve versus exposition time and absorbed dose was built for each case. Components of re- ceptor adaptation in a Pacinian corpuscle. Coli cells lost some basic biochemical properties when the received doses were in the range of 0. Behavioral modulation of tactile responses in the rat somatosensory sys- tem.

Spontaneous fluctua- tions of excitability in the muscle spindle of the frog. 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].

Be- haviour of human motor units in different muscles during linearly varying contractions.

Evaluation of Escherichia coli cells damages induced by ultraviolet and proton beam radiation. With the experiments described above it was possible to conclude that: The ionizing and not ionizing radiations can cause mutations through direct or indirect action on the cellular surface. The Escherichia coli E.

Curso Superior de Tecnologia em Radiologia. 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].

Artigo de revisao sobre potencial de membrana

Evidence for saltatory conduc- tion in peripheral myelinated nerve fibres. Mortazavi, An Introduction to Radiation Hormesis. After the irradiation the cells were submitted to a series of biochemical tests. 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].

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Livro Biofísica Básica – Ibrahim Felippe Heneine

An exposition time of 3 to 15 seconds for UVc radiation and dose ranging from 0. Deutsch S, Deutsch A. Some properties of motor unit action potential trains recorded during constant force isometric contractions in man.

At the present work possible transformations on E. A quantita- tive description of membrane currents in rabbit my- elinated nerve. Analysis of impulse adaptation in motoneurons.

Biofiwica concept of hormesis radiation is normally applied to radiation doses in the range of 1 to 50 Blofisicawhich means, radiation doses that instead of provoking irreparable damage that would lead to cellular death, would provoke a radioadaptative response that would benefit the cell and its descendant [9], [10]. La Lettre des Neuros- ciences. This antibiotic intervenes in the synthesis niofisica the peptidoglycan of the cell’s wall, resulting in the incapacity of the cell to divide, without provoking its death [8].

The microscopical studies showed that the E.