http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Nilda Espinola-Zavaleta,Antonio Vega,Diego Martínez Basto,Ana Cecilia Alcantar-Fernández,Veronica Guarner Lans,María Elena Soto 한국심초음파학회 2015 Journal of Cardiovascular Imaging (J Cardiovasc Im Vol.23 No.1
Background: Hypertrophic cardiomyopathy (HCM) is the most common hereditary heart disease with diverse phenotipyc,genetic expession and clinical presentations. The evolution of patients with HCM in Latin America has not been properly describedbeing the frequency, the long-term prognosis as well as the predominant phenotypic expression still unknown. The aim of thisstudy was to determine the survival rate of HCM patients having different phenotypes in a Mexican cohort of patients. Methods: Clinical and echocardiographic data obtained from 77 Mexican patients with recently diagnosed HCM wereanalyzed. The follow-up was of 12.5 years. Results: 96.1% of patients were in functional class I/II according to the New York Heart Association, 2.6% in class III and 1.3%in class IV. Only 3.9% of them went to surgery for myectomy. During the follow-up, 17 patients (22%) died: 4/9 (44%) had apicalHCM, 5/20 (25%) had obstructive septal asymmetric HCM, 6/35 (17%) had nonobstructive septal asymmetric HCM and 2/3(15%) had concentric HCM. The survival rate was worse for patients with apical HCM, followed by those with obstructive andnonobstructive septal asymmetric HCM and patients showing concentric HCM had the best survival rates. There is significantdifference in survival rates which declined in 65% in a 9 years-period. Log rank test showed significant differences (p < 0.002). Conclusion: The survival rate of patients with HCM was worse in those with apical variety. The majority of patients receivedmedical treatment. The indication for myectomy was below that observed in other international centers.
Expression of heat shock protein genes in Simmental cattle exposed to heat stress
Guzmán Luis Felipe,Martínez-Velázquez Guillermo,Villaseñor-González Fernando,Vega-Murillo Vicente Eliezer,Palacios-Fránquez José Antonio,Ríos-Utrera Ángel,Montaño-Bermúdez Moisés 아세아·태평양축산학회 2023 Animal Bioscience Vol.36 No.5
Objective: In tropical, subtropical and arid zones, heat stress is the main cause of productivity reduction in cattle. When climate stressors occur, animals become thermal adapted through differential expression of some genes, including heat shock proteins (HSP) family. The aim of this study was to determine levels of expression of HSP60, HSP70, and HSP90 genes in Simmental cattle raised in tropical environments of Mexico. Methods: In this study, expression of HSP60, HSP70, and HSP90 genes was analyzed in 116 Simmental cattle from three farms with tropical climate located in western Mexico. Animals were sampled twice a day, in the morning and noon. Gene expression was evaluated by quantitative polymerase chain reaction using probes marked with fluorescence. The MIXED procedure of SAS with repeated measures was used for all statistical analysis. Results: HSP60 gene expression differences were found for sex (p = 0.0349). HSP70 gene differences were detected for sampling hour (p = 0.0042), farm (p<0.0001), sex (p = 0.0476), and the interaction sampling hour×farm (p = 0.0002). Gene expression differences for HSP90 were observed for farm (p<0.0001) and year (p = 0.0521). HSP70 gene showed to be a better marker of heat stress than HSP60 and HSP90 genes. Conclusion: Expression of HSP70 gene in Simmental herds of the tropical region of western México was different during early morning and noon, but the expression of the HSP60 and HSP90 genes was similar. Identification of resilient animals to heat stress will be useful in the genetic improvement of the Simmental breed.
X-ray and gamma ray shielding behavior of concrete blocks
Hernandez-Murillo Christian Geovanni,Molina Contreras J. Rafael,Escalera-Velasco Luis Alberto,de Leon-Martínez Héctor Asael,Rodriguez-Rodriguez José Antonio,Vega-Carrillo Héctor Rene 한국원자력학회 2020 Nuclear Engineering and Technology Vol.52 No.8
The shielding characteristics of two concrete blocks, widely used in the building industry in Mexico have been determined. These characteristics include the mass interaction coefficients, the linear attenuation coefficients and the half-value layers. The energy-dispersed X-ray fluorescence shows that the percentage mass content of each atom in the sample, and the atomic volume of the constituent elements of a material, plays an important role in its shielding capabilities. The total linear attenuation coefficients and the half-value layers were analyzed for a set of photon energies related to X-rays for diagnosis and cancer treatment with linear accelerators. Our results show that the concrete blocks have similar photon attenuation coefficients than the Portland concrete and better features than gypsum