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Registros recuperados: 14
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Alteration of the Reproductive Patterns in Drosophila melanogaster by Effects of High Concentrations of Boron on In Vitro Cultured Medium International Journal of Morphology
Espinoza-Navarro,O; Rodríguez,H; Rodríguez,M; Silva,E; Luque,A.
The objective of this study was to evaluate the effects of boron (B) using as a biological model Drosophila malanogaster. Analizing specifically the responses over descendency to doses of 6,0 and 12 mg/L, comparing a control group which culture medium was prepared with water with boron concentrations of 0,6 mg/L, according to World Health Organization. The results show a significative alteration in the number of descendency from F1 to F3 and then a tendency to normalization in F4 and F5. Also a significant change in proportions between the males and females, with an acute effect on F1 and then a possible chronic effect from F2 to F5, increasing the proportion of females over males. This differences between genders are significant only until F4, on F5 these...
Tipo: Journal article Palavras-chave: Reproduction; Boron; Reproductive toxicology; Drosophila melanogaster.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000300021
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Composición Corporal y el Efecto de un Programa de Fuerza Auxiliar para Prevenir Lesiones en Musculos Cuádriceps Femoral, Isquiotibiales y Bíceps Femoral en Jóvenes Universitarios Futbolistas International Journal of Morphology
Espinoza-Navarro,O; Valle,S.
El objetivo de esta investigación fue conocer los efectos de un programa de fuerza auxiliar en la prevención de lesiones de los músculos: cuádriceps femoral, isquiotibiales y bíceps femoral en futbolistas universitarios de la ciudad de Madrid, independiente del programa normal de entrenamiento del club universitario. Veinticuatro jugadores universitarios de entre 19 a 28 años participaron en el estudio, separados en grupo control (n=12) y grupo experimental (n=12). En ambos grupos se evaluó inicialmente el desplazamiento y la velocidad (potencia), mediante un transductor de movimiento o "encoder". Posteriormente al grupo experimental se le aplicó un programa de fuerza auxiliar, para reforzar los músculos del muslo, por un período de 6 meses. El Comité de...
Tipo: Journal article Palavras-chave: Lesiones; Fútbol; Fuerza muscular; España.
Ano: 2014 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022014000300056
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Determinación del Porcentaje de Masa Grasa, según Mediciones de Perímetros Corporales, Peso y Talla: Un Estudio de Validación International Journal of Morphology
Díaz,J; Espinoza-Navarro,O.
La obesidad se caracteriza por un aumento excesivo de la grasa corporal. En Chile, en el año 2010, se determinó que el 25,1% de la población sobre los 15 años, presentaba obesidad y un 39,3 % sobrepeso. El objetivo de esta investigación fue validar un método económico y de fácil manejo para los profesionales de la Educación, que permita determinar los porcentajes de masa grasa (%MG) en población escolar, ocupando las variables de perímetros corporales, el peso y la talla (PPT). A una muestra de 1725 alumnos de enseñanza básica, 1020 niñas y 705 niños, de entre 10 a 14 años de edad de la Comuna de Arica (XV Región), se les determinó el %MG según el modelo propuesto de perímetro, peso y talla (PPT). Como modelos de referencia se utilizaron los protocolos de...
Tipo: Journal article Palavras-chave: Perímetros corporales; Chile; Enseñanza Básica.
Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000400054
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Effects of Altitude on Anthropometric and Physiological Patterns in Aymara and Non-Aymara Population Between 18 and 65 Years in the Province of Parinacota Chile (3.700 masl) International Journal of Morphology
Espinoza-Navarro,O; Diaz,J; Rodríguez,H; Moreno,A.
The aim of the study was to compare anthropometric and physiological patterns in a sample of 522 Aymara and non-Aymara individuals from Parinacota, Chile (3.700m). After signing voluntary informed consent forms, the residents were separated in two age groups. Groups A: 18 to 35 years, and Group B: 36 to 65 years, by sex and Aymara and non-Aymara ethnicity. The results of this study determined that anthropometric anteroposterior diameter (DAP) are higher in Aymara population. Biacromial diameter (DBA) is significantly lower in the Aymara population. Aymara males between 18 and 35 years are smaller than non-Aymara males. Aymara women had significantly lower heart rates. The respiratory rate is significantly lower in Aymara males and females from 18 to 35...
Tipo: Journal article Palavras-chave: Aymara; Altitude; Anthropometry; Physiological patterns.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000100005
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Effects of High Altitude on Morphophysiological Patterns, Perception and Attention Capacity in Students from Putre (3500 m.a.s.l.) and Arica (2 m.a.s.l.), Chile International Journal of Morphology
Espinoza-Navarro,O; Graú,S.
High altitude hypoxia is a stress that triggers several adaptive mechanisms, one of which is how the brain responds to lack of oxygen. The aim of this study was to determine changes in morphological and physiological patterns and in the attention capacity and perception in student populations from the highlands and from a sea level location. Eighty students, aged 14 to 16 years old, both sexes, from the Municipalities of Putre (3500 m.a.s.l.) and Arica (2 m.a.s.l.) participated in this study, with each group composed of 20 women and 20 men. After informed consent was obtained and with the students acceptance, parameters such as weight, height, BMI, heart rate, systolic and diastolic blood pressures were obtained. Subsequently, a psychometric test of...
Tipo: Journal article Palavras-chave: Altitude; Andean highlands; Attentional capacity; Psychometrics; Chile.
Ano: 2014 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022014000200036
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Effects of Malathion on Cellularity and Sperm Differentiation in Testis and Epididymis of Adult Rats International Journal of Morphology
Espinoza-Navarro,O; Bustos-Obregón,E.
Malathion is an organophosphorous insecticide, used worldwide for pest and disease control; however, it could also affect the reproductive patterns of several species. The aim of this study was to determine the effects of malathion in the cellularity and sperm differentiation in testis and epididymis of rats. Twenty adult male Sprague Dawley rats were divided into a malathion-treated group (n=10, dose of 170 mg/kg via subcutaneous injection for a period of 13 days) and control group (n=10, injected only with normal saline). After treatments, the rats were sacrificed by regulated euthanasia and assessed for sperm count in testis and epididymis and epididymal teratospermia degree. The results showed a significant decrease in body, testicular and epididymal...
Tipo: Journal article Palavras-chave: Reproduction; Rat; Malathion; Cytotoxicity.
Ano: 2014 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022014000100020
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Evaluación y Estandarización de la Calidad del Espermiograma: Nuevos Límites Inferiores de Referencia International Journal of Morphology
Espinoza-Navarro,O; Sarabia,L.
El análisis seminal o espermiograma es uno de los parámetros más usados en la evaluación de la fertilidad masculina. La OMS (WHO, 2010), presentó el 5 Manual para el examen y procesamiento del semen humano, documento que fue analizado durante el primer taller de estandarización del análisis seminal (PLEAS), realizado en Santiago de Chile, mayo del 2010. Posteriormente se aplicaron los nuevos valores indicados como "límite de referencia inferior" (LIR), en el estudio del análisis seminal realizados por varios autores (2003 al 2010). Los resultados obtenidos indican que el 81% de los investigadores latino americanos creen que el nuevo manual estandariza mejor la concentración espermática, un 96% está de acuerdo con la nueva subclasificación en la motilidad...
Tipo: Journal article Palavras-chave: Análisis seminal; Espermiograma; Fertilidad masculina; Límite de referencia inferior.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000300036
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Histological and Functional Organization in Human Testicle: Expression of Receptors c-kit and Androgens International Journal of Morphology
Rodríguez,H; Espinoza-Navarro,O; Sarabia,L; Tamayo,C; Sepúlveda,M; Inostroza,J; Araya,J. C; Moriguchi,K.
The objective of this work was identify the presence of interstitial cells of Cajal, muscle cells, nerves and androgen receptor positive cells in adult human testicle, using immunohistochemical detection for c-kit/CD-117, actin smooth muscle specific (ASMS), neurofilament (N) and androgen receptor (AR), respectively. The samples were obtained from patients (n= 10) with diagnosis of prostate cáncer, with surgery of orchiectomy. Subsequently were processed by histology and for immunohistochemistry using specific antibodies. It showed the presence of cells c-kit/CD-117, with diverse degrees of positivity, distributed mainly in the interstitial peritubular área of the human testicle. The peritubular myoides cells were positive to the presence of the actin...
Tipo: Journal article Palavras-chave: Human reproduction; Testicle; Interstitial Cajal cells; Tubular motility; AR.
Ano: 2008 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022008000300015
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Histological Description of the Interaction Between Muscle Fibers and Connective Tissue of the Fascia of the Human Trapezius Muscle International Journal of Morphology
Rodriguez,H; Espinoza-Navarro,O; Silva,I; Quiroz,P; Arriaza,C; Sanchez,C; Vallejos,R; Castro,M. E; Arias,M; Jimenez,L; Fernandez,E.
The skeletal muscle fascia corresponds to a condensation of connective tissue. Fascias are highly innervated and sensitive, and can cover non-expandable structures as well as musculature. It is suggested that fascias have a pivotal role in functions such as postural regulation, peripheral motor coordination and proprioception. Also, the presence of inflammation and microcalcification in fascia of patients with localized muscle pain has been described, suggesting a pathogenic role in pain. The aim was to describe the histological structure of the external deep fascia of the trapezius muscle, with emphasis on the content and arrangement of muscle fibers, type I collagen, and adipose tissue. Sample material was obtained from a male cadaver (60-70 years old),...
Tipo: Journal article Palavras-chave: Fascia; Trapezius; Human histology.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000100049
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Histological Study on the Male Reproductive Organs of Mouse CF1 Treated With Boron International Journal of Morphology
Espinoza-Navarro,O; Vilaxa,A; Granifo,L; Rojas,S; Rodríguez,H.
Boric acid and borate are abundant in the nature and widely used in industrial, agricultural and cosmetology applications. However it is informed as toxic in a high dose. Residents of Arica-Chile with boron-rich geology deposits are regularly exposed to higher levels in drinking water in concentrations of 6. 0 and 12.0 mg/L. The objective of this study was to analyze the damage in the masculine reproductive apparatus of mouse CF1, exposed to boric acid in concentrations of 0.54; 2.0-6.0 and 12.0 mg/L, after 60 days of treatment. Male gonad segments were fixed in Bouin's solution for 6 hours and embedded in paraffin, longitudinal sections (5 mm) were processed for histology using the hematoxyline/eosin method. The results observed in treated animals...
Tipo: Journal article Palavras-chave: Boric acid; Spermatogenesis; Testicular atrophy; Mouse.
Ano: 2007 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022007000200017
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Patrones Antropométricos y Consumo Máximo de Oxígeno (VO2) entre Niños Escolares Chilenos Aymaras y No Aymaras de 10 a 12 Años, que Viven en Altura (3.500 msnm) y en la Planicie (500 msnm) International Journal of Morphology
Espinoza-Navarro,O; Vega,C; Urrutia,A; Moreno,A; Rodríguez,H.
El objetivo del estudio fue comparar peso, talla, índice de masa corporal (IMC) y consumo de oxígeno (VO2 max) en una muestra de 73 alumnos de 10 a 12 años del poblado de Putre a 3500 metros de altitud (n=31) y del pueblito de San Miguel de Azapa, que lo hacen a 500 metros de altitud (n=42). Los sujetos fueron evaluados según, procedencia, sexo y etnia aymará y No aymará. Los resultados muestran una disminución significativa de los patrones antropométricos de niños y niñas de Putre en comparación con los de San Miguel de Azapa. Los aymará de Putre damas y varones presentan un IMC bajo lo normal (<20). Los varones aymará de San Miguel de Azapa presentan un peso significativamente mayor que los varones no aymará, sin embargo todos los alumnos de San...
Tipo: Journal article Palavras-chave: Aymará; Altura; VO2; IMC.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000400054
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Prevalencia de Patrones Antropométricos y Fisiológicos en Población de Adultos Mayores, sobre los 60 Años en Arica,Chile International Journal of Morphology
Diaz,J; Espinoza-Navarro,O; Rodríguez,H; Moreno,A.
El envejecimiento humano es un proceso complejo y multifactorial que involucra aspectos cognitivos, sociales y físicos. El objetivo de este estudio fue determinar valores de algunos patrones antropométricos y fisiológicos y comparar el efecto de la actividad física, de estos patrones en población adulta mayor. Cien adultos mayores en edades a partir de los 60 años participaron de este estudio. En esta población se procedió a medir peso, talla y calcular el índice de masa corporal (IMC), además se obtuvieron registros de la capacidad vital y el consumo máximo de oxígeno. Luego a través de muestra sanguínea se determinó hematocrito y hemoglobina. La población se categorizó en rangos de edades y se separó según género. Posteriormente por encuesta simple de...
Tipo: Journal article Palavras-chave: Envejecimiento; Salud pública; Antropometría; Hemoglobina.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000400064
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Protective Effect of Melatonin on Damage in the Sperm Parameters of Mice Exposed to Diazinon International Journal of Morphology
Sarabia,L; Espinoza-Navarro,O; Maurer,I; Ponce,C; Bustos-Obregón,E.
Since normal sperm parameters can be altered by organophosphorous pesticides, this study intended to determine if melatonin is able to prevent the damage on sperm quality after an acute exposure to diazinon. Adult male mice were injected intraperitoneally with melatonin, diazinon (1/3 or 2/3 LD50) or both, and sperm parameters were evaluated on days 1 or 32 post injection. Groups treated with diazinon showed elevated lipid peroxidation levels on day 1 post treatment, while groups pretreated with melatonin before diazinon showed no difference compared to control. Sperm count showed a significant decrease in both diazinon-treated groups only on day 32 post injection; no differences were observed in groups pretreated with melatonin prior to diazinon compared...
Tipo: Journal article Palavras-chave: Melatonin; Organophosphates; Antioxidant; Mouse sperm; Sperm morphology.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000400029
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Stem Cells and Androgen Receptor in Human Periapical Periodontitis International Journal of Morphology
Rodríguez,H; Espinoza-Navarro,O; Peñafiel,C; Escobar,E; Silva,I; Quiroz,P; Arriaza,C; Castro,M. E; Sánchez,C; Arias,M; Michea,A.
Activation of macrophages in periapical granulomas occurs through the presence of cytokines, endotoxin and other genetic and epigenetic factors, allowing the initiation of inflammation and bone resorption. The present study aims to analyze the presence of CD133 protein (marker of stem cells) and the AR (androgen receptor) protein in biopsies of human odontogenic periapical granuloma. Biopsies from 14 adult male patients with diagnosis of periapical granuloma included in paraffin blocks were processed histologically to obtain 5-µm thick sections. Protein presence was detected and analyzed by immunohistochemistry of CD133 and AR. The quantification considered the number of positive cells in 0.17 mm2 random areas under the microscope using a 1000X objective....
Tipo: Journal article Palavras-chave: Stem cell; Androgen receptor; Granuloma; Periodontitis.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000300048
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