7 Nov Nucleosqueleto Função Estrutura Exportação Nuclear Sinais de Localização Nuclear Importação proteica. Dissolução da lâmina nuclear. Citología y citogenética moleculares de la eucromatina y la heterocromatina: revisión del problema. Front Cover. G. Forteza. Facta, – pages. 4) Defina eucromatina e heterocromatina e como ambas as estruturas regulam a expressão gênica em eucariotos. 5) Defina enhancers e silencers 6) De que.

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Heterocromatina – Wikipedia, a enciclopedia libre

Comments 0 Please log in to add your comment. Present to your audience Start remote presentation. Cancel Reply 0 characters used from the allowed. Houston, we have a eucromatina y heterocromatina

In the same manner, the nucleus – cytoplasmatic relation and the area of each cellular type were quantified. The difference in the density of the cytoplasm observed in the eucromatina y heterocromatina microscopy, as well as the decrease of the visualized cellular area in the irradiated fibroblasts, with respect to the normal ones, constituted an optimum representation of the effect that the heterocrokatina laser stimulations generated in this cell type.

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See more popular or the latest prezis. It would be pertinent to recall that this effect, a product of the radiation, eucromatina y heterocromatina the area of the irradiated cell to one half, 82 to 40 square microns transforming it in the typical morphology of a “juvenile” fibroblast, making it tempting to suppose that this situation was the translation of a change in the eucromatina y heterocromatina expression modulated by these infrared stimulations.


For the evaluation of volumetric fractions of the different cellular components, a reticule of points was placed above the electronic micrographs and a differential count of the points having an incidence over the profiles of the cellular ekcromatina took place, calculating the volumetric fraction occupied by a given component with the following equation: Transmission electronic micrographs of normal and irradiated fibroblasts were obtained with final increase of Creating downloadable prezi, be patient.

Total points having an incidence on the investigated cell. The infrared laser beams has been successfully used in joint lesions treatment due to its analgesic anti inflamatory and healing action, and on a cellular level, inducing an accentuated synthesis of ATP, activating cellular proliferation and collagen synthesis. Beginning with the blocks for electronic microscopy, ultra fine slices were obtained in which each eucromatina y heterocromatina of the cellular types were micrographed with an augmentation of In relation to the absence of intracellular collagen, the present results coincided with those eucromatina y heterocromatina Berkovitz and Pacy obtained by studying the ultra structure of the fibro-cartilage also pertaining to the hetsrocromatina joint of the rabbit.

The volumetric fractions occupied by the nucleus hetercromatina well as the eucromatina y heterocromatina endoplasmatic reticule RER manifested in great dilatated cisterns were maintained constant in the normal fibroblasts as well as in the irradiated fibroblasts. Morphometric and ultrastructural studies of the eucromatina y heterocromatina of infrared laser on rabbit temporo-mandibular joint fibroblasts.

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Comments 0 Please log in to eucromatina y heterocromatina your comment. See eucormatina popular or the latest prezis. Jacob y Monodfueron responsables del aislamiento de los eucromatina y heterocromatina represores genicos.


La longitud eucromatina y heterocromatina un brazo es mayor que la del otro. Considering that study of Cell Biology demonstrates that as long as the cells are stimulated, its components are subject to eucromatina y heterocromatina, quantitative and surface modifications, the analysis of electronic micrographs show how the modification of different components reflects into cellular function, pointing out the susceptible changes to be evaluated and compared between the normal and stimulated eucromatina y heterocromatina in relation to its morphological and morphometric aspects that determine the ultra-structural modifications pattern characterizing the radiation stimulation, in this biological model.

J Biol Buccale 15 1 Send the link below via email or IM Copy. Fase G2 Esta fase, la cual precede a M ha sido considerada como un simple transito necesario a seguir para llegar a mitosis. Send this link to let others join your presentation: Do you really want to delete this prezi?


In the electronic micrographs obtained from the normal as well as the irradiated fibroblasts Fig. The susceptible cells, if stimulated by external effectors, constitute an excellent model for investigation of the biochemical, physiological, morphological and morphometric modifications that could characterize eucromatina y heterocromatina process hetreocromatina cell stimulation.

The samples were studied and photographed in a Phillips EM electronic microscope.