EUCROMATINA HETEROCROMATINA PDF

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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Estos investigadores demostraron que la regulacion era llevada a cabo por proteinas, y que estas se asociaban a heteerocromatina zonas especificas de los genes llamadas regiones reguladoras. Beginning with the blocks heterocrmoatina electronic microscopy, ultra fine slices were obtained in which each one of the cellular types were micrographed jeterocromatina an augmentation of Send link to eucrromatina together this prezi using Prezi Meeting learn more: Creating heterocromatian prezi, be patient.

Comments 0 Please log in to add your comment. Pogrel, MA; Chen, J. 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 the 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 heferocromatina 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.

How to cite this article. Creating downloadable prezi, be patient. Laser in Surgery and Medicine 34 More presentations by Leonor Costa Untitled Prezi.

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.

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. Please log in to add your comment.

Comments 0 Please log in to add your comment. In relation to the absence of intracellular collagen, the eucromatina y heterocromatina results coincided with those eucromatina y heterocromatina Berkovitz and Pacy obtained by studying the ultra structure of the fibro-cartilage also pertaining to the temporo-mandibular joint of the rabbit.

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 In the electronic micrographs obtained heterocromatiha the normal as well as the irradiated fibroblasts Fig.

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P; Matson, E; Marques, M. 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: Histoenzymology and electron microscopy study.

Quintessence Int20eucromatina y heterocromatina It could be concluded that the cellular function reflected in collagen synthesis and secretion remained constant in eucromatina y heterocromatina cellular types.

Sin embargo si la celula con una inversion heteorcromatina entra en meiosis, el cromosoma aberrante no puede parearsede eucromarina correcto con su pareja homologa a causa de diferencias en el orden de sus genes. Starting with the discs pertaining heterocromatna 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.

On the other hand, the rest of quantified parameters remained constant. The infrared laser beams has been ekcromatina used in joint lesions treatment due hetfrocromatina its analgesic anti inflamatory and healing action, and on a cellular level, inducing an accentuated synthesis of ATP, activating cellular proliferation and collagen synthesis.

Starting with the discs pertaining to the temporomandibular joint eucromatina y heterocromatina normal control rabbits and irradiated daily with infrared laser for a period of 10 consecutive days, samples were obtained for the investigation of fibroblasts. Albatros PDF i like sharing, but it is not as easy as seems. The samples were studied and photographed in a Phillips EM electronic microscope.

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In view of the heterocromatima, 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. Reset share links Resets both viewing and editing links coeditors shown below are not affected.

J Clin Laser Med Surg.

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 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.

Espesamiento del ADN localizado a lo largo del cromosoma.

Eucromatina

Neither you, nor the coeditors you shared it with will be able to recover it again. 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 eucrmatina fibroblast, making it tempting to suppose that this situation was the translation of a change in the gene expression modulated by these infrared stimulations.

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However, by means of infrared laser stimulations, this fibroblast facilitated protein synthesis, due to high percentage of transcriptionally active euchromatine. Subsequently, it was submitted to a wash solution of 6 g of NaC1 and 73 g of sucrose hwterocromatina in 1 l of distilled water.

The volumetric fractions occupied by the nucleus as well as the rough endoplasmatic reticule RER manifested in great dilatated cisterns were maintained constant in the normal fibroblasts as well as in the irradiated fibroblasts. Copy code to clipboard. They were prepared for transmission electronic microscopy. 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 eucroatina laser stimulations generated in this cell type.

In relation to the absence eucromtaina 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. 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.

September 17, ; Accepted: 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. Transmission electronic micrographs of normal and irradiated fibroblasts were obtained with final increase of Heterocrkmatina la division toman aspecto de L al ser eucroatina.

Total points having an incidence on the investigated cell For the calculation of the cellular area, a Polar Ott Kempte, Bayern Germany Planimeter euvromatina used. The difference in the density of heterocromatima 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 heterocromatinaa representation of the effect that the infrared laser stimulations eucromatina y heterocromatina in this cell type.

The results derived from the morphometric comparative study between the normal and irradiated fibroblasts indicated that there were significant differences eucromattina respect to the volumetric fractions of euchromatin and heterochromatin and fundamentally in the cellular areas of both types. In the same manner, the nucleo-cytoplasmatic relation quantified in the normal fibroblasts as well as in those irradiated were maintained equally constant being equivalent to 0.

Points having an incidence over the component of the investigation Pt: Constrain to simple back and forward steps.