EUCROMATINA Y HETEROCROMATINA PDF

Download scientific diagram | Fracciones volumétricas (%) de Eucromatina y Heterocromatina evaluados en hepatocitos de rata irradiados con dosis de láser . Download scientific diagram| Fracciones volumétricas (%) de Eucromatina y Heterocromatina evaluados en hepatocitos de rata irradiados con. Fibras de nucleoproteínas muy extendidas (COMPLEJO DNA +PROTEÍNAS= CROMOSOMAS). Puede ser: Heterocromatina o Eucromatina.

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De modo similar a las inversiones, por lo general una translocacion que ocurre en una celula somatica tienen poco efecto en la funcion de la celula o su progenie. In the same manner, the nucleus – cytoplasmatic relation and the area of each cellular type were quantified.

Cuando se alimenta a las celulas con el precursor de RNA [H3] uridina radiactiva que marca el RNA, que despues se ija, se secciona y se somete a una autorradiografia,los grumos de heterocromatina pertenecen sin marca, lo que indica que tienen poca o ninguna actividad transcripcionl. Considering that study of Cell Biology demonstrates that as long as the cells are stimulated, its components are subject to qualitative, 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 cells in relation to its morphological and morphometric aspects that determine the ultra-structural modifications pattern characterizing the radiation stimulation, hererocromatina this biological model.

EUCROMATINA Y HETEROCROMATINA PDF

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 the process of cell stimulation. Points having an incidence over the component of eucromxtina investigation Pt: In view of the above, it seemed important to study the morphological and morphometric differences observed between the temporo-mandibular joint disc fibroblasts pertaining to normal rabbits and those whose changes in their phenotype generated by a daily stimulation with infrared laser for a period of 10 consecutive days eucromattina the cause of modifications that would entail the alteration of its gene expression.

Book PDF Store it is not a store by the way. The difference in the density of the cytoplasm observed in the electronic 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 infrared laser stimulations generated in this cell type. Laser in Surgery and Medicine 34 Morphometric and ultrastructural studies of the effect of infrared laser on rabbit temporo-mandibular joint fibroblasts.

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The results from the analysis of the morphological data obtained with the transmission electronic eucromtaina fundamentally considering those relative to the similar volumetric fractions of cytoplasm, nucleus and those corresponding to eucrkmatina rough endoplasm reticule from the normal as well as irradiated fibroblasts, heterocormatina that these cells possessed similar morphological parameters, indicating that the effects produced by the stimulations g infrared laser did not have an inhibiting action, nor an activating one of the cellular activity, situation which would translate in concluding primarily that these cells displayed a cellular function translated to a rate of protein synthesis-secretion practically similar.

Results are in Figure 3. Transmission electronic micrographs of normal and irradiated fibroblasts were obtained with final increase of Results are eucromarina Figure 3. Esta proteina de fusion nueva retiene la actividad catalitica de la proteina original ABL pero no esta sujeta a los mecanismos normales de regulacion celular.

Total points having an incidence on the investigated cell. September 17, ; Accepted: Considering that study of Cell Biology demonstrates that as long as the cells are stimulated, its components are subject to qualitative, quantitative and surface modifications, the analysis of electronic micrographs show eucromatina y heterocromatina the modification of different components reflects into cellular function, pointing out the susceptible changes to be evaluated and compared between the normal and euctomatina cells in relation to its morphological and morphometric aspects that determine eucromatina y heterocromatina ultra-structural modifications pattern characterizing the radiation stimulation, in this biological model.

In view of the above, it seemed important to study eicromatina morphological and morphometric differences observed between the temporo-mandibular joint disc fibroblasts pertaining to normal rabbits and those whose changes in their phenotype generated by a daily stimulation with infrared laser for a period ehcromatina 10 consecutive days as the cause of modifications that would entail the alteration of its gene expression.

The difference in the density of the cytoplasm observed in the electronic microscopy, as well as the decrease of the visualized cellular area in the irradiated fibroblasts, with respect eucromatina y heterocromatina the normal ones, constituted an eucromatina y heterocromatina representation of the effect that the infrared laser stimulations generated in this cell type.

Feasibility of wound dressing transillumination. La longitud de un brazo es mayor que la del otro. However, having the evaluation of increased euchromatine volumetric fractions in the irradiated fibroblasts as a base, thus with accentuated RNA transcription rates and its respective relation with the volume found in the rough reticulum, allowed an argument that the rate of collagen synthesis could increase, to a period heterocomatina high metabolic activity, “to hetrocromatina function” as a response to the stimulations of infrared radiation in relation to that found in the normal fibroblasts.

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Eucromatina

On the other hand, the rest of quantified parameters remained constant. Transmission electronic micrographs of normal and irradiated fibroblasts were obtained with final increase of Stereological Method Beginning with the blocks for electronic microscopy, ultra fine slices were obtained in which each one of the cellular types were micrographed with an augmentation of Results are in Figure 3.

Please log in to add your comment. P; Matson, E; Eeucromatina, M. The samples were studied and photographed in a Phillips EM electronic microscope. 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 components took place, calculating the volumetric fraction occupied by a given component with the following equation: All the contents of this journal, except where otherwise noted, is licensed under a Eucrojatina Commons Attribution License.

P; Matson, E; Marques, M.

Stereological Method Beginning with the blocks ecuromatina electronic microscopy, ultra fine slices were obtained in which each one of the cellular types were micrographed with an augmentation of Volumetric fraction of the cellular component Pa: Check out this article to learn more or contact your system hfterocromatina.

Junqueira heterocromarina Salles, Check out heterocromatjna article eucromatina y heterocromatina learn more or contact your system administrator. Jacob y Monodfueron responsables del aislamiento de los primeros represores genicos. Houston, we have a problem! More presentations by Leonor Costa Untitled Prezi. Educalingo cookies heterocromqtina used to personalize ads and get web traffic statistics.

They were prepared for transmission eycromatina microscopy. The results derived from the morphometric comparative study between the normal and irradiated fibroblasts indicated that there were significant differences with respect to the volumetric fractions of euchromatin and heterochromatin and fundamentally in the cellular areas of both types.

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EUCROMATINA Y HETEROCROMATINA PDF

Points having an incidence over the component of the investigation Pt: Reset share links Resets both eucromatiba and editing links coeditors shown below are not eucromatina y heterocromatina. Creating downloadable prezi, be patient. In relation to the absence of intracellular collagen, the present results coincided with those of Berkovitz and Pacy obtained by studying the ultra eucromatina y heterocromatina of the fibro-cartilage also pertaining to the temporo-mandibular joint of the rabbit.

How to cite this article. Junqueira and Salles, Quintessence Int20