fer cho | FLACSO-Ecuador - Academia.edu (original) (raw)
Uploads
Papers by fer cho
This study describes the coronary artery distribution patterns associated with the anomalous orig... more This study describes the coronary artery distribution patterns associated with the anomalous origin of the left coronary artery from the right side of the aortic valve in Syrian hamsters. The hearts of 15 a¡ected animals were examined by means of a corrosion-cast technique, histology and scanning electron microscopy. The hamsters belonged to a laboratory inbred colony with a high incidence of coronary artery anomalies and bicuspid aortic valves. The aortic valve was tricuspid in eight hamsters and bicuspid in the other seven. In all cases, the right coronary artery was normal, whereas the left main coronary artery trunk arose from the right aortic sinus or from the right side of the ventral aortic sinus when the aortic valve was bicuspid. In 12 specimens, the left main trunk crossed the infundibular septum and then divided into the left circum£ex branch and the obtuse marginal branch. In another specimen, the course of the left main trunk was ventral to the right ventricular out£ow tract; in the remaining two, it surrounded the aorta dorsally. In man, some of these distribution patterns may cause myocardial ischaemia and sudden death. The present ¢ndings prove that the origin of the left coronary artery from the right aortic sinus occurs in primitive mammals such as the Syrian hamster, suggesting that the defect may occur in other mammalian species. Its possible occurrence should be borne in mind in domestic animals, especially in those with signs of myocardial ischaemia after strenuous activity. r
Como se reconoce una máquina de corriente continua? Cuáles son las partes constitutivas y como re... more Como se reconoce una máquina de corriente continua? Cuáles son las partes constitutivas y como reconoce a sus devanados? Se reconoce porque no dispone de anillos rozantes. Consta de un colector, escobillas, bobinas en el rotor y en el estator, y puede tener un devanado imbricando u ondulado, el devanado imbricando tiene conectada las bobinas a delgas adyacentes en el colector y el devanado ondulado tiene las bobinas conectadas a delgas con separación de 2 polos.
Febs Letters, 1997
p94fer and p51ferT are two nuclear tyrosine kinases encoded by the FER locus in the mouse. While ... more p94fer and p51ferT are two nuclear tyrosine kinases encoded by the FER locus in the mouse. While p94fer accumulates in somatic cells, p51ferT is found solely in meiotic spermatogenic cells. Ectopic expression of p94fer or p51ferT in CHO cells, led to tyrosine phosphorylation of cellular 66, 68 and 120 kDa proteins. A 120, 68 and 66 kDa phosphoproteins, coimmunoprecipitated with p94fer and p51ferT from extracts of transfected CHO cells. Subcellular fractionation analysis indicated that the 66 kDa tyrosine phosphorylated protein colocalizes with p51ferT to perinuclear and nuclear fractions in actively growing cells. However, in growth arrested cells, the 66 kDa phosphoprotein was associated mainly with chromatin while its level in the other nuclear compartments was significantly reduced. The 66 kDa phosphoprotein may thus mediate the nuclear function of the FER proteins and link it to cell growth.
This study describes the coronary artery distribution patterns associated with the anomalous orig... more This study describes the coronary artery distribution patterns associated with the anomalous origin of the left coronary artery from the right side of the aortic valve in Syrian hamsters. The hearts of 15 a¡ected animals were examined by means of a corrosion-cast technique, histology and scanning electron microscopy. The hamsters belonged to a laboratory inbred colony with a high incidence of coronary artery anomalies and bicuspid aortic valves. The aortic valve was tricuspid in eight hamsters and bicuspid in the other seven. In all cases, the right coronary artery was normal, whereas the left main coronary artery trunk arose from the right aortic sinus or from the right side of the ventral aortic sinus when the aortic valve was bicuspid. In 12 specimens, the left main trunk crossed the infundibular septum and then divided into the left circum£ex branch and the obtuse marginal branch. In another specimen, the course of the left main trunk was ventral to the right ventricular out£ow tract; in the remaining two, it surrounded the aorta dorsally. In man, some of these distribution patterns may cause myocardial ischaemia and sudden death. The present ¢ndings prove that the origin of the left coronary artery from the right aortic sinus occurs in primitive mammals such as the Syrian hamster, suggesting that the defect may occur in other mammalian species. Its possible occurrence should be borne in mind in domestic animals, especially in those with signs of myocardial ischaemia after strenuous activity. r
Como se reconoce una máquina de corriente continua? Cuáles son las partes constitutivas y como re... more Como se reconoce una máquina de corriente continua? Cuáles son las partes constitutivas y como reconoce a sus devanados? Se reconoce porque no dispone de anillos rozantes. Consta de un colector, escobillas, bobinas en el rotor y en el estator, y puede tener un devanado imbricando u ondulado, el devanado imbricando tiene conectada las bobinas a delgas adyacentes en el colector y el devanado ondulado tiene las bobinas conectadas a delgas con separación de 2 polos.
Febs Letters, 1997
p94fer and p51ferT are two nuclear tyrosine kinases encoded by the FER locus in the mouse. While ... more p94fer and p51ferT are two nuclear tyrosine kinases encoded by the FER locus in the mouse. While p94fer accumulates in somatic cells, p51ferT is found solely in meiotic spermatogenic cells. Ectopic expression of p94fer or p51ferT in CHO cells, led to tyrosine phosphorylation of cellular 66, 68 and 120 kDa proteins. A 120, 68 and 66 kDa phosphoproteins, coimmunoprecipitated with p94fer and p51ferT from extracts of transfected CHO cells. Subcellular fractionation analysis indicated that the 66 kDa tyrosine phosphorylated protein colocalizes with p51ferT to perinuclear and nuclear fractions in actively growing cells. However, in growth arrested cells, the 66 kDa phosphoprotein was associated mainly with chromatin while its level in the other nuclear compartments was significantly reduced. The 66 kDa phosphoprotein may thus mediate the nuclear function of the FER proteins and link it to cell growth.