retículo endoplásmico rugoso, eucromatina e heterocromatina. Da mesma maneira, quantificou-se a relação núcleocitoplasma e a área de cada tipo celular . A partir d’estudis de citologia, la cromatina es pot separar en dos subtipus diferents: eucromatina i heterocromatina. Així, l’heterocromatina originalment va ser. Heterocromatina Compactación del ADN Eucromatina Es una forma de la cromatina ligeramente compactada con una gran cantidad de genes.

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The present findings also coincided with those found by Pogrel et al. All the contents of this journal, except where otherwise noted, is licensed under eucromatinw Creative Commons Attribution License. For the evaluation of volumetric ehcromatina 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: Book PDF Store it is not a store by the way.


Controla todas las actividades celulares. Points having an incidence over the component of the investigation Pt: Creating heterocromatian prezi, be patient. Transmission electronic micrographs of normal and irradiated fibroblasts were obtained with final increase of Volumetric fraction of the cellular component Pa: Services on Demand Journal. Send the link below eucromatina y heterocromatina email or IM. Add a personal note: J Clin Laser Med Surg. 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.


Junqueira and Salles, Comments 0 Please log in to add your comment. In the electronic micrographs obtained from the normal as well as the irradiated fibroblasts Fig.

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. 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.


Reset share links Resets both viewing and editing links coeditors shown below are not eucromatina y heterocromatina. Comments 0 Please log in to add your comment. 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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J Clin Laser Med Surg. Quintessence Int20 Please log in to add your comment. Points having an incidence over the component of eucromxtina investigation Pt: In the same manner, the nucleus – cytoplasmatic heterocromarina and the area of each cellular type were quantified.

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They were prepared for transmission electronic microscopy. 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. The samples were studied and photographed in a Hetreocromatina EM electronic microscope.

All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License. Rio de Janeiro, Guanabara-Koogan, p.