Bone age estimation by TW2 and TW3 methods in indigenous children from Oaxaca, Mexico

Por su vinculación con la edad cronológica y el estatus de maduración, la edad ósea es útil en los campos clínico, forense, legal y deportivo. En 1983 Tanner y colaboradores propusieron el método TW2, años más tarde lo modificaron denominándolo TW3. En Latinoamérica, los estudios en población abierta en los que se han estimado las edades óseas empleado dichos métodos son muy escasos y no se llegan a conclusiones precisas sobre la conveniencia de utilizar uno u otro, y en México no se cuenta con trabajo alguno publicado en el que se utilice el método TW3. Objetivo: explorar cual método (TW2 o el TW3) es más apropiado para estimar la edad ósea en menores que comparten ancestrías de origen indoamericano y que participan de rasgos culturales similares. Se utilizaron radiografías de muñeca y mano obtenidas entre los años 1986 y 1987, en 393 menores (182 mujeres y 211 hombres) de 6 a 17 años de edad, de origen mixteco, residentes en la Heroica Ciudad de Tlaxiaco, Oaxaca, México. Para la estimación de la edad ósea se siguieron las técnicas RUS de TW2 y TW3. Se encontraron diferencias estadísticamente significativas entre la estimación de la edad ósea por los métodos TW2 y TW3. Entre las edades estimadas por el método TW2 y la edad cronológica se encontraron mayores diferencias que empleando el TW3, estimaciones derivadas que más se apegaron a la edad cronológica.In clinical, forensic, legal and sport fields it is usefull to estimate the chronological age as well as the maturation status and therefore it is useful to determine it through the bone age. In 1983 Tanner et al. proposed the TW2 method, which was later modified and renamed as TW3. In Latin America, bone age studies of open populations using the TW2 and TW3 methods were carried out, but none of them concludes which of both is more accurate and for Mexico there are no published data on TW3. Objective: to explore which method (TW2 or TW3) is most appropriate to estimate bone age of children who share indoamerican ancestry and participate of similar cultural traits. Based on X-Rays of hand and wrist obtained between 1986 and 1987 in 393 youngsters (182 girls and 211 boys) from 6 to 17 years of age of Mixtec origin from the Heroica Ciudad de Tlaxiaco, Oaxaca, Mexico, bone age was estimated folowing RUS TW2 and RUS TW3 methods. Significant statistical differences were found between TW2 and TW3. Greater differences were found using TW2 method vs chronological age, than using the TW3, derived estimates which lay closer to chronological age.Asociación de Antropología Biológica de la República Argentin

Bone age estimation by TW2 and TW3 methods in indigenous children from Oaxaca, Mexico

Por su vinculación con la edad cronológica y el estatus de maduración, la edad ósea es útil en los campos clínico, forense, legal y deportivo. En 1983 Tanner y colaboradores propusieron el método TW2, años más tarde lo modificaron denominándolo TW3. En Latinoamérica, los estudios en población abierta en los que se han estimado las edades óseas empleado dichos métodos son muy escasos y no se llegan a conclusiones precisas sobre la conveniencia de utilizar uno u otro, y en México no se cuenta con trabajo alguno publicado en el que se utilice el método TW3. Objetivo: explorar cual método (TW2 o el TW3) es más apropiado para estimar la edad ósea en menores que comparten ancestrías de origen indoamericano y que participan de rasgos culturales similares. Se utilizaron radiografías de muñeca y mano obtenidas entre los años 1986 y 1987, en 393 menores (182 mujeres y 211 hombres) de 6 a 17 años de edad, de origen mixteco, residentes en la Heroica Ciudad de Tlaxiaco, Oaxaca, México. Para la estimación de la edad ósea se siguieron las técnicas RUS de TW2 y TW3. Se encontraron diferencias estadísticamente significativas entre la estimación de la edad ósea por los métodos TW2 y TW3. Entre las edades estimadas por el método TW2 y la edad cronológica se encontraron mayores diferencias que empleando el TW3, estimaciones derivadas que más se apegaron a la edad cronológica.In clinical, forensic, legal and sport fields it is usefull to estimate the chronological age as well as the  maturation status and therefore it is useful to determine it through the bone age. In 1983 Tanner et al. proposed the TW2 method, which was later modified and renamed as TW3. In Latin America, bone age studies of open populations using the TW2 and TW3 methods were carried out, but none of them concludes which of both is more accurate and for Mexico there are no published data on TW3. Objective: to explore which method (TW2 or TW3) is most appropriate to estimate bone age of children who share indoamerican ancestry and participate of similar cultural traits. Based on X-Rays of hand and wrist obtained between 1986 and 1987 in 393 youngsters (182 girls and 211 boys) from 6 to 17 years of age of Mixtec origin from the Heroica Ciudad de Tlaxiaco, Oaxaca, Mexico, bone age was estimated folowing RUS TW2 and RUS TW3 methods. Significant statistical differences were found between TW2 and TW3. Greater differences were found using TW2 method vs chronological age, than using the TW3, derived estimates which lay closer to chronological age

Bone age estimation by TW2 and TW3 methods in indigenous children from Oaxaca, Mexico

Por su vinculación con la edad cronológica y el estatus de maduración, la edad ósea es útil en los campos clínico, forense, legal y deportivo. En 1983 Tanner y colaboradores propusieron el método TW2, años más tarde lo modificaron denominándolo TW3. En Latinoamérica, los estudios en población abierta en los que se han estimado las edades óseas empleado dichos métodos son muy escasos y no se llegan a conclusiones precisas sobre la conveniencia de utilizar uno u otro, y en México no se cuenta con trabajo alguno publicado en el que se utilice el método TW3. Objetivo: explorar cual método (TW2 o el TW3) es más apropiado para estimar la edad ósea en menores que comparten ancestrías de origen indoamericano y que participan de rasgos culturales similares. Se utilizaron radiografías de muñeca y mano obtenidas entre los años 1986 y 1987, en 393 menores (182 mujeres y 211 hombres) de 6 a 17 años de edad, de origen mixteco, residentes en la Heroica Ciudad de Tlaxiaco, Oaxaca, México. Para la estimación de la edad ósea se siguieron las técnicas RUS de TW2 y TW3. Se encontraron diferencias estadísticamente significativas entre la estimación de la edad ósea por los métodos TW2 y TW3. Entre las edades estimadas por el método TW2 y la edad cronológica se encontraron mayores diferencias que empleando el TW3, estimaciones derivadas que más se apegaron a la edad cronológica.In clinical, forensic, legal and sport fields it is usefull to estimate the chronological age as well as the maturation status and therefore it is useful to determine it through the bone age. In 1983 Tanner et al. proposed the TW2 method, which was later modified and renamed as TW3. In Latin America, bone age studies of open populations using the TW2 and TW3 methods were carried out, but none of them concludes which of both is more accurate and for Mexico there are no published data on TW3. Objective: to explore which method (TW2 or TW3) is most appropriate to estimate bone age of children who share indoamerican ancestry and participate of similar cultural traits. Based on X-Rays of hand and wrist obtained between 1986 and 1987 in 393 youngsters (182 girls and 211 boys) from 6 to 17 years of age of Mixtec origin from the Heroica Ciudad de Tlaxiaco, Oaxaca, Mexico, bone age was estimated folowing RUS TW2 and RUS TW3 methods. Significant statistical differences were found between TW2 and TW3. Greater differences were found using TW2 method vs chronological age, than using the TW3, derived estimates which lay closer to chronological age.Asociación de Antropología Biológica de la República Argentin

Bone age estimation by TW2 and TW3 methods in indigenous children from Oaxaca, Mexico

Por su vinculación con la edad cronológica y el estatus de maduración, la edad ósea es útil en los campos clínico, forense, legal y deportivo. En 1983 Tanner y colaboradores propusieron el método TW2, años más tarde lo modificaron denominándolo TW3. En Latinoamérica, los estudios en población abierta en los que se han estimado las edades óseas empleado dichos métodos son muy escasos y no se llegan a conclusiones precisas sobre la conveniencia de utilizar uno u otro, y en México no se cuenta con trabajo alguno publicado en el que se utilice el método TW3. Objetivo: explorar cual método (TW2 o el TW3) es más apropiado para estimar la edad ósea en menores que comparten ancestrías de origen indoamericano y que participan de rasgos culturales similares. Se utilizaron radiografías de muñeca y mano obtenidas entre los años 1986 y 1987, en 393 menores (182 mujeres y 211 hombres) de 6 a 17 años de edad, de origen mixteco, residentes en la Heroica Ciudad de Tlaxiaco, Oaxaca, México. Para la estimación de la edad ósea se siguieron las técnicas RUS de TW2 y TW3. Se encontraron diferencias estadísticamente significativas entre la estimación de la edad ósea por los métodos TW2 y TW3. Entre las edades estimadas por el método TW2 y la edad cronológica se encontraron mayores diferencias que empleando el TW3, estimaciones derivadas que más se apegaron a la edad cronológica.In clinical, forensic, legal and sport fields it is usefull to estimate the chronological age as well as the maturation status and therefore it is useful to determine it through the bone age. In 1983 Tanner et al. proposed the TW2 method, which was later modified and renamed as TW3. In Latin America, bone age studies of open populations using the TW2 and TW3 methods were carried out, but none of them concludes which of both is more accurate and for Mexico there are no published data on TW3. Objective: to explore which method (TW2 or TW3) is most appropriate to estimate bone age of children who share indoamerican ancestry and participate of similar cultural traits. Based on X-Rays of hand and wrist obtained between 1986 and 1987 in 393 youngsters (182 girls and 211 boys) from 6 to 17 years of age of Mixtec origin from the Heroica Ciudad de Tlaxiaco, Oaxaca, Mexico, bone age was estimated folowing RUS TW2 and RUS TW3 methods. Significant statistical differences were found between TW2 and TW3. Greater differences were found using TW2 method vs chronological age, than using the TW3, derived estimates which lay closer to chronological age.Asociación de Antropología Biológica de la República Argentin

Temporal variability of hydrographic conditions around the Balearic Islands from two mooring lines

Póster presentado en la General Assembly 2011 de la European Geosciences Union (EGU), celebrada del 3 al 8 de abril de 2011 en Viena (Austria)Peer Reviewe

Characterization of Vibrio harveyi strains recovered from diseased farmed Senegalese sole (Solea senegalensis)

Aim: To characterize 16 Vibrio harveyi strains isolated from different epizootic outbreaks affecting farmed Senegalese sole. Materials and Results: The Vibrio harveyi strains tested have broad phenotypic diversity based on their biochemical and exoenzymatic patterns, outer membrane proteins (OMP), extracellular product (ECP) patterns and presence of prophages. Lethal dose 50 (LD50) of the strains and in vitro antagonism tests with two probiotic strains were also determined. The OMP analysis revealed three different patterns (A, M and V). The electrophoretic analysis of the ECP showed two different groups. All strains considered virulent based on their LD50 exhibited the same protein pattern in their ECP (pattern I), while all nonvirulent strains showed a different profile (pattern II). About 32% of the tested strains were positive for prophages, although a clear relationship between virulence and the presence of prophages has not been established. Conclusions: The results obtained have shown differences between virulent and avirulent strains isolated from diseased farmed Senegalese sole based on the protein patterns of their ECP. However, a clear relationship between virulence and presence of prophages has not been established. Significance and Impact of the Study: The differences observed between virulent and nonvirulent strains could be used to design prophylactic strategies against diseases caused by V. harveyi in farmed Senegalese sole

Effect of somatostatin on the mass accumulation of inositol-1,4,5- trisphosphate in rat hypothalamus, striatum, frontoparietal cortex and hippocampus

Somatostatin-14 (SS) significantly increased inositol-1,4,5-triphosphate (IP3) accumulation in rat hypothalamic, striatal, frontoparietal cortical and hippocampal slices. However, this stimulation of IP3accumulation by SS was highest in the frontoparietal cortex and hippocampus. The effect was already significant with 0.01 μM in the frontoparietal cortex (P < 0.05) and hippocampus (P < 0.05) and the maximal accumulation was evident with 0.1 μM SS, in all areas studied. A concentration of 1 μM SS, lacked this effect in hypothalamus and striatum. SS rapidly increased IP3 accumulation in all brain areas studied. This effect was maximal at 15 s of incubation and decreased subsequently. At 60 s incubation, levels were still elevated in frontoparietal cortex and hippocampus but had returned to basal values in hypothalamus and striatum. Somatostatin-28 (SS-28) and the SS analogues, D-Trp8-D-Cys14 and SMS 201–995, also significantly stimulated IP3 accumulation although the effect of SMS 201–995 was greater than that of SS in the striatum in comparison with controls (P < 0.001 and P < 0.01, respectively). These results suggest that SS action at the hypothalamus, striatum, frontoparietal cortex and hippocampus is mediated at least in part by the accumulation of IP3, which may initiate intracellular processes responsible for some biological SS effects

Intestinal parasites and genotypes of Giardia intestinalis in school children from Berisso, Argentina

Introduction: Intestinal parasitic infections have been reported in different regions of Argentina. Giardia intestinalis is recognized as "the national parasite". The aim of this work was to determine the prevalence of both intestinal parasites and G. intestinalis genotypes, as well as to analyze the clinical and epidemiological characteristics in schoolchildren from a suburban community. Methodology: Serial coproparasitological analysis and perianal swab method were performed in 244 schoolchildren. Demographic, sociocultural and environmental variables were registered. The presence of signs/symptoms and risk behaviours were also recorded. Stools with G. intestinalis were selected for genotyping. Results: Out of 244 schoolchildren, 179/244 (73.4%) were infected with intestinal parasites. The presence of intestinal parasitosis was associated only with house flooding. Multivariate analysis identified that use of a latrine is significantly correlated with G. intestinalis and age six to 11 years with E. vermicularis . Signs and symptoms were recorded in 62% of infected children and in 57.9% of those not infected. Genomic amplification was revealed that 65.7% (46/70) of Giardia positive samples corresponded to genotype B , 31.4% (22/70) to genotype AII, and two samples (2.8%) had mixed infection (AII + B). Conclusions: This study shows a high percentage of infected children living in a suburban community in poor sanitary conditions, and not visiting the doctor in spite of evident signs and symptoms associated a digestive pathology. This situation supports the need for continuing the development of community programs allowing the improvement of quality of life and control of parasitosis in deprived populations.Facultad de Ciencias MédicasFacultad de Ciencias VeterinariasComisión de Investigaciones Científicas de la provincia de Buenos Aire

Metodología para un estudio sobre imágenes en matemáticas

Este artículo describe las razones que nos llevaron a elegir una metodología cualitativa -el estudio de casos- como metodología fundamental en la investigación, cuyo propósito era construir explicaciones sobre el uso que el alumnado de 8º de E.G.B. (13 a 15 años), en un centro y en un aula determinada, hace de las imágenes mentales cuando resuelve y da sentido a problemas matemáticos. Ordenar con precisión y rigor todos los instrumentos utilizados en la recogida de la información y dar explicaciones de cómo se han llevado a cabo los análisis es el objetivo prioritario de este trabajo