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The microscopical studies showed that the E.

Livro Biofísica Básica – Ibrahim Felippe Heneine – PDF Free Download

After the irradiation the cells were submitted to a series of biochemical tests. A quantita- tive description of membrane currents in rabbit my- elinated nerve. The occurrence of morpho-physiologic alterations in the cells of E. The biochemical test carried out was the following: It was observed that the 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. Adaptation of the dis- charge of frog muscle spindles following a stretch.

Coli cells lost some basic biochemical properties when the received doses were in the range of 0.

Time course and properties of late adaptation in spinal motoneurones of the cat. Evidence for saltatory conduc- tion in peripheral myelinated nerve fibres. With the experiments described above it was possible to conclude that: Coli cells elongated after irradiation with UVc as well as heniene proton beam. Morphological and physiological alterations occurred in Escherichia coli E.


Spontaneous fluctua- tions of excitability in the muscle spindle of the frog. Menezes, Tratado de Microbiologiap.

Energy-efficient action po- tentials in hippocampal mossy fibers.

The average number of CFU for each exposition time was calculated through equation 1 concerning survival fraction FSwhere N represents the CFU after each irradiation and N 0 corresponds to the CFU in plates not exposed to radiation [6], [7]: The induction of N-methyl-D-aspar- tate receptor-dependent long-term potentiation. For the radiation with proton beams the absorbed doses ranged from 0. At the present work possible transformations on E. All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License.

How to cite this article. Heneinw in cell membrane and nerve fiber. The ionizing and not ionizing radiations can cause mutations through direct or indirect action on the cellular surface. Prokaryote cells were exposed biorisica ultra violet UVc radiation and to proton beams in order for the induced effects to be bioflsica. The prokaryotes compose an interesting group of microorganisms, which can be used as instruments of scientific investigation.

Adaptation of cat moto- neurons to sustained and intermittent extracellular activation. By microscopic observations it was noticed that the E. This can be explained by the fact that they possess intrinsic properties, such as reduced time of generation and bioffisica low cost of culture and maintenance [1], [2].


Loewenstein WR, Mendelson M.

Livro Biofísica Básica – Ibrahim Felippe Heneine

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].

Kernell D, Monster AW. Marini M, Veicsteinas A. An exposition time of 3 to 15 seconds for UVc radiation and dose ranging from 0. Principles of electric circuits, electron flow version. Action po- tential duration restitution portraits of mamma- lian ventricular myocytes: 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.

Calaméo – Livro Biofísica Básica – Ibrahim Felippe Heneine

A model illustrating some aspects of muscle spindle physiology. Components of re- henene adaptation in a Pacinian corpuscle.

For the irradiation with UVc radiation a dilution of 1: Biofsica of Escherichia coli cells damages induced by ultraviolet and proton beam radiation. 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]. In the literature the elongation phenomenon of E.