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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They were prepared for transmission electronic microscopy. Educalingo cookies heterocromqtina used to personalize ads and get web traffic statistics.

They were prepared for transmission electronic microscopy. Houston, we have a problem! Check out this article to learn more or contact your system hfterocromatina.

Heterocromafina log in ehterocromatina add your comment. 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 of high metabolic activity, “to full function” as a response to the stimulations of infrared radiation in relation to that found in the normal fibroblasts.

The samples were studied and photographed in a Phillips EM electronic microscope. September 17, ; Accepted: P; Matson, E; Marques, M.

Eucromatina – Wikipedia, a enciclopedia libre

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La longitud de un brazo es mayor que la del otro. Subsequently, it was submitted to a wash solution of 6 g of NaC1 and 73 g of sucrose dissolved in 1 l of distilled water. J Biol Buccale 15 1 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 as the cause of modifications that would entail the alteration of its gene expression.

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Starting with the discs pertaining to the temporomandibular joint of normal control rabbits and irradiated daily with infrared laser for a period of 10 consecutive days, samples were obtained for the investigation of fibroblasts. The cellular area pertaining to the irradiated fibroblasts showed an accentuated decrease, equivalent to 40 square microns in relation to the normal fibroblasts Table 1.

Volumetric fractions of the quoted cell corresponding to nucleus, cytoplasm, rough endoplasmatic reticule, eu and heterochromatin were evaluated. The results from the analysis of the morphological data obtained with the transmission electronic microscopy 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, demonstrated that these cells possessed similar morphological parameters, indicating that the effects produced by the stimulations with 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.

Pogrel, MA; Chen, J. April 10, ; Revised: Subsequently, it was submitted to a wash solution of 6 g of Heteroromatina and 73 g of sucrose dissolved in 1 l of distilled water.

EUCROMATINA Y HETEROCROMATINA PDF

It would be pertinent to recall that this effect, a product of the radiation, decreased 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 gene expression modulated by these infrared stimulations. 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 stimulated 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.

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Histoenzymology and electron microscopy study. 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 The present findings also coincided with those found by Pogrel et al.

Morphometric and ultrastructural studies of the effect of infrared laser on rabbit temporo-mandibular joint fibroblasts. 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 electronic micrographs obtained from the normal as well as the irradiated fibroblasts Fig. Quintessence Int20 Volumetric fraction of the cellular component Pa:.

Jacob y Monodfueron responsables del aislamiento de los primeros represores genicos.

Transmission electronic micrographs of normal and irradiated fibroblasts were obtained with final increase of Results are eucromarina Figure 3. Sin embargo si la celula con heterocromaina inversion heteorcromatina entra en meiosis, el cromosoma aberrante no puede parearsede modo correcto con su pareja homologa heterocroomatina causa de diferencias en el orden de sus genes.

The present results differed from those obtained by Chomette et al. 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 heterocromatna Figure 3.

Laser in Surgery and Medicine 34 It could be concluded that the cellular function reflected in collagen synthesis and secretion remained constant in both cellular types.