El objetivo de este estudio fue analizary comparar la composición corporal y el somatotipo de atletas ciegos de fútbol 5 de alto rendimiento de diferentes posiciones de juego. Participaron de esta ...investigación 63 atletas (28,0±5,8años) de diferentes equipos masculinos defútbol5 de alto rendimiento. Los atletas fueron sometidos a una evaluación antropométrica a fin de para obtener las medidas: espesor de pliegues cutáneos, perímetros corporales, diámetros óseos, estatura y masa corporal total. A partir de estas medidas fueron calculados los siguientes parámetros: porcentaje de grasa corporal y porcentaje de masa magra, Σ de 9 pliegues cutáneos, índice de masa corporal y somatotipo. Los jugadores Alas presentaron valores inferiores en porcentaje de grasa (%G=17,4%) en comparación con los atletas Cierre (23,1%) y Pivot (21,5%), ambos con diferencia significativa (p<0,05). Se obtuvo un perfil somatotpio meso-endomorfo con predominancia del componente muscular, tanto para el grupo general como separadamente por posiciones de juego. El conocimiento de la composición corporal y del somatotipo de estos atletas de fútbol5 podrá contribuir hacia la orientación y el monitoreo de entrenamientos, favoreciendo el rendimiento deportivo.
Palabras Clave: Discapacidad visual; Atletas paralímpicos; Somatotipo; Antropometría, Fútbol 5.
Abstract. The aim of this study was to analyze and compare the body composition and the somatotype of blind athletes of 5-a-side football of high-performance in different positions in play. Participated in this research 63 blind athletes (28.0 ± 5.8 years) from male of teams of 5-a-side football of high-performance.The athletes underwent an anthropometric evaluation to obtain the following measurements: skinfold thickness, body perimeters, bone diameters, height and total body mass. From these measurements, the following parameters were calculated: body fat percentage, lean mass percentage, Σ of the 9 skinfolds, body mass index and somatotype. Wing athletes showed a significant difference (p <0.05) with lower values for % G (17.4%) compared to fixed athletes (23.1%) and pivots (21.5%). A meso-endomorphic somatotype profile was obtained, with a predominance of the muscular component in the team and in all positions in play. The knowledge of body composition and somatotype of these blind athletes of 5-a-side footballcan contribute to guidance and monitoring of training, favoring sports performance.
Key words: Visual impairment; Paralympic athletes; Somatotype; Anthropometry, Five-a-side football.
ABSTRACT Quantification of soil properties is essential for better understanding of the environment and better soil management. The conventional techniques of laboratory analysis are sometimes costly ...and detrimental to the environment. Thus, development of new techniques for soil analysis that do not generate residues, such as spectroscopy, is increasingly necessary as a viable way to estimate a wide range of soil properties. The objective of this study was to predict the levels of organic carbon (OC), clay, and extractable phosphorus (P), from the spectral responses of soil samples in the visible and near infrared (Vis-NIR), medium infrared (MIR), and Vis-NIR-MIR using different preprocessing methods combined with five prediction models. Soil samples were collected in Iconha, Espírito Santo State, Brazil, in the Ribeirão Inhaúma basin. A total of 184 samples were collected from 92 sites at two depths (0.00-0.10 and 0.10-0.30 m). Physical, chemical, and spectral analyses were performed according to routine soil laboratory methods. Random selection was made of 70 % of total samples for training and 30 % for validation of the models. The coefficient of determination (R2) and root mean square error (RMSE) were calculated in order to assess model performance. The standardized indexes of prediction error RPD and RPIQ were also calculated. For clay and OC, the best R2 was found in the MIR spectrum, at 0.69 and 0.65, respectively, and for P, it was 0.57 in Vis-NIR. The MSC (Multiplicative Scatter Correction), CR (Continuum removal), and SNV (Standard Normal Variate) preprocesses were most efficient for predicting clay, OC, and P, respectively, while the PLSR - Partial Least Squares Regression (OC and P) and SVM - Support Vector Machine (clay) gave the best predictions and are therefore recommended for modeling these properties in the study area. The models identified in this study can be used to discriminate soils according to a critical test value for clay, OC, and P.
The main pedological, geomorphological and cryogenic features of Keller Peninsula, part of Admiralty Bay, King George Island, Maritime Antarctica, were mapped and quantified with emphasis on the ...relationship between the ice retreat process, melt-out, landform development and soil distribution. Moraines, protalus, scree slopes, inactive glacial cirques, uplift marine terraces, biogenic landforms, arêtes and Felsenmeer were mapped. Scree slope is the main landform, covering approximately 25% of the peninsula, indicating prominent paraglacial features. Inherited, glacial landforms, such as lateral moraines, highland plateau and exhumed U shaped-valleys, are now being exposed in north Keller by ice shrinkage of former ice protecting cover. Landforms influenced soil formation and stability. Cryosols and Leptosols (WRB) roughly corresponding to Gelisols and Entisols (SSS), respectively, are the most common soil classes, with an overall tendency of absent permafrost in the coastal areas, changing to sporadic permafrost at mid-slope, and discontinuous permafrost with greater altitude and substrate stability.
► Periglacial and paraglacial geomorphology of Antarctica. ► Weathering and soil formation of polar regions. ► Cryosols and active layer in Antarctica; sulfate-affected soils of Antarctica. ► Landscape evolution and climate change in Antarctica. ► Soils and landform relationships in polar regions.
Visceral adipose tissue (VAT) has high metabolic activity and secretes a larger number of adipokines that are related to the inflammatory process. Quantifying VAT could estimate the risk of ...developing Metabolic Syndrome (MetS). This study was designed to determine the VAT cut-off points assessed by DXA associated with MetS in military men. In total, 270 (37.5 ± 6.9 years) military men from the Brazilian Army (BA) participated in the study. Anthropometric measurements, assessment of body composition by dual X-ray absorptiometry (DXA), hemodynamics and biochemical tests were performed. The Student’s t test, independent samples, Person’s correlation, ROC curve, Youden Index and positive (PPV) and negative predictive value (NPV) were used. The MetS prevalence was 27.4%, which means that 74 (38.0 ± 7.3 years) military men had at least three risk factors of MetS present. The cutoff point of VAT with the highest balance between sensitivity (77.0%) and specificity (69.9%) was 1025.0 cm3 (1086.0 g). An area on the ROC curve was 0.801 (p < 0.000), which was very good precision. VAT ≥ 1025.0 cm3 (1086.0 g) is associated with the risk factors of MetS and is, therefore, a predictor of the disease with good indicators of sensitivity and specificity and a robust indicator of MetS.
ABSTRACT Introduction It has been suggested that visceral adipose tissue (VAT) is associated with several non-communicable chronic diseases, but measuring it is difficult. Thus, anthropometry could ...be used because is easily applied in clinical practice. Objectives The present study aimed to develop and validate VAT estimation equations (Eq) in military men. Methods The sample consisted of 409 (mean age, 36.5 ± 6.7 years) military men in the Brazilian Army (BA) divided into an equation group (EG) ( n = 270; mean age, 37.0 ± 6.3 years) and a validation group (VG) ( n =139; mean age, 36.0 ± 7.2 years). Anthropometric, hemodynamic and DXA body composition evaluations ( GE iLunar ) were performed. The Student’s t test, Pearson’s correlation, and stepwise general linear regression were applied. Bland-Altman graphics were used to assess the concordance between VAT by Eq and by DXA. The level of significance was 95% ( p < 0.05). Results Age, waist circumference (WC), hip circumference and body mass index presented the main significant positive correlations with the VAT-DXA. Four Eq were created Eq1 ( r 2 = 0.793), Eq2 ( r 2 = 0.810), Eq3 ( r 2 = 0.817), and Eq 4 ( r 2 = 0.823) ( p < 0.05). No differences were observed between VAT by DXA and VAT by Eq ( p = 0.982, p = 0.970, p = 0.495 and p = 0.698). Bland-Altman analysis also presented good concordance as the bias was close to zero and was not statistically significant. Conclusion Eq2 (age*13.0 + WC*60.0 - 4975,.5) was more suitable because it is easier to apply, has a higher predictive power (81.0%), less bias (1.86) and validation yielded average VAT values close to those found in DXA. It may still be considered a valuable tool for other extensive epidemiological studies in military men in the BA and can be used in adult men. Evidence Level I: Development of diagnostic criteria on consecutive patients (with universally applied reference ‘‘gold’’ standard).
RESUMEN Introducción La literatura científica ha sugerido que el tejido adiposo visceral (TAV) está asociado a enfermedades crónicas no transmisibles, pero es difícil hacer su medición. Así, la antropometría puede ser empleada por ser de fácil aplicación en la práctica clínica. Objetivos Este estudio tuvo como objetivo desarrollar y validar ecuaciones de estimativa (Ec) del TAV en militares. Métodos La muestra consistió en 409 (promedio de edad 36,5 ± 6,7 años) militares del Ejército Brasileño (EB) divididos en Grupo de ecuación (GE) (n = 270; promedio de edad 37,0 ± 6,3 años) y Grupo validación (GV) (n = 139; promedio de edad 36,0 ± 7,2 años). Fueron realizados análisis antropométricos, hemodinámicos y de composición corporal por DXA (GE iLunar). Fueron aplicados el teste t de Student, la correlación de Pearson y la regresión linear general Stepwise. Los gráficos de Bland-Altman fueron usados para evaluar la concordancia entre los resultados de TAV por la Ec y por DXA. El nivel de significancia fue de 95% (p <0,05). Resultados Edad, circunferencia de cintura (CC), circunferencia de la cadera y el índice de masa corporal presentaron las principales correlaciones positivas y significativas con TAV-DXA. Fueron creadas cuatro ecuaciones: Ec1 (r2 = 0,793), Ec2 (r2 = 0,810), Ec3 (r2 = 0,817) y Ec4 (r2 = 0,823), p <0,05. No fueron observadas diferencias entre el TAV por DXA por las Ec (p = 0,982, p = 0,970, p = 0,495 y p = 0,698). El análisis de Bland-Altman también presentó buena concordancia, porque el sesgo fue próximo de cero y no estadísticamente significativo. Conclusiones La Ec2 (edad*13,0 + CC*60,0 - 4975.5) fue más adecuada, porque que es más fácil de aplicar, tiene mayor poder predictivo (81,0%), menor sesgo (1,86) y la validación suministró valores promedio de TAV próximos a los encontrados en el DXA. Además, puede ser considerada una herramienta valiosa para otros estudios epidemiológicos extensos en militares del EB y puede ser usada en hombres adultos. Nivel de Evidencia I: Test de criterios diagnósticos desarrollados anteriormente en pacientes consecutivos (con patrón de referencia “oro” aplicado).
RESUMO Introdução A literatura científica tem sugerido que o tecido adiposo visceral (TAV) está associado a doenças crônicas não transmissíveis, mas é difícil fazer sua mensuração. Assim, a antropometria pode ser empregada por ser de fácil aplicação na prática clínica. Objetivos Este estudo teve como objetivo desenvolver e validar equações de estimativa (Eq) do TAV em militares. Métodos A amostra consistiu em 409 (média de idade 36,5 ± 6,7 anos) militares do Exército Brasileiro (EB) divididos em Grupo equação (GE) (n = 270; média de idade 37,0 ± 6,3 anos) e Grupo validação (GV) (n = 139; média de idade 36,0 ± 7,2 anos). Foram realizadas avaliações antropométricas, hemodinâmicas e de composição corporal por DXA (GE iLunar). O teste t de Student, a correlação de Pearson e a regressão linear geral Stepwise foram aplicados. Os gráficos de Bland-Altman foram usados para avaliar a concordância entre os resultados de TAV pela Eq e por DXA. O nível de significância adotado foi de 95% (p <0,05). Resultados Idade, circunferência da cintura (CC), circunferência do quadril e o índice de massa corporal apresentaram as principais correlações positivas e significativas com TAV-DXA. Foram criadas quatro equações: Eq1 (r2 = 0,793), Eq2 (r2 = 0,810), Eq3 (r2 = 0,817) e Eq 4 (r2 = 0,823), p < 0,05. Não foram observadas diferenças entre o TAV por DXA pelas Eq (p = 0,982, p = 0,970, p = 0,495 e p = 0,698). A análise de Bland-Altman também apresentou boa concordância, porque o viés foi próximo de zero e não estatisticamente significativo. Conclusões A Eq2 (idade*13,0 + CC*60,0 - 4975,5) foi mais adequada, porque é mais fácil de aplicar, tem maior poder preditivo (81,0%), menor viés (1,86) e a validação forneceu valores médios de TAV próximos aos encontrados no DXA. Além disso, pode ser considerada uma ferramenta valiosa para outros estudos epidemiológicos extensos em militares do EB e pode ser usada em homens adultos. Nível de Evidência I; Teste de critérios diagnósticos desenvolvidos anteriormente em pacientes consecutivos (com padrão de referência “ouro” aplicado).
The industrial yield of first-generation ethanol from sweet sorghum
Sorghum bicolor
(L.) Moench is a complex trait that depends on genetic and environmental factors, as well as on expression of a ...series of other traits, especially sugar yield and fermentation efficiency. The aim of this study was to evaluate the maturation curve and the period of industrial use (PIU) of sweet sorghum genotypes, as well as their fermentation potential with two strains of
Saccharomyces cerevisiae
. In field experiments, ten sweet sorghum genotypes were evaluated in three locations in the 2016–2017 crop season. The following traits were measured: flowering time, fresh matter production, plant height, juice extraction, total soluble solids content (TSS), and tons of Brix per hectare. Plants were harvested at seven different cutting times. Regression equations were fitted to describe the maturation curve and determine the PIU. In the fermentation experiment, the five genotypes with highest TSS in the last three cutting times in the field trials were tested. The yeast strains LNF Ca11 and a bakers’ yeast (BY) were used in the fermentation process. The profile of sugar accumulation in the stalk over the time was affected by the phenology of each sweet sorghum genotype. Some genotypes had PIU greater than 40 days. Fermentation potential was affected by the sweet sorghum genotype, by the yeast strain, and by the interaction between these factors. The combination of the yeast strain BY and the genotype CMSXS647 had the highest fermentation potential.
Because of its wide distribution, high yield potential, and short cycle, the potato has become essential for global food security. However, the complexity of tetrasomic inheritance, the high level of ...heterozygosity of the parents, the low multiplication rate of tubers, and the genotype-by-environment interactions impose severe challenges on tetraploid potato–breeding programs. The initial stages of selection take place in experiments with low selection accuracy for many of the quantitative traits of interest, for example, tuber yield. The goal of this study was to investigate the contribution of incorporating a family effect in the estimation of the total genotypic effect and selection of clones in the initial stage of a potato-breeding program. The evaluation included single trials (STs) and multi-environment trials (METs). A total of 1,280 clones from 67 full-sib families from the potato-breeding program at Universidade Federal de Lavras were evaluated for the traits total tuber yield and specific gravity. These clones were distributed in six evaluated trials that varied according to the heat stress level: without heat stress, moderate heat stress, and high heat stress. To verify the importance of the family effect, models with and without the family effect were compared for the analysis of ST and MET data for both traits. The models that included the family effect were better adjusted in the ST and MET data analyses for both traits, except when the family effect was not significant. Furthermore, the inclusion of the family effect increased the selective efficiency of clones in both ST and MET analyses via an increase in the accuracy of the total genotypic value. These same models also allowed the prediction of clone effects more realistically, as the variance components associated with family and clone effects within a family were not confounded. Thus, clonal selection based on the total genotypic value, combining the effects of family and clones within a family, proved to be a good alternative for potato-breeding programs that can accommodate the logistic and data tracking required in the breeding program.
The potential of using spectroscopy for the quantification of soil attributes through its spectral signature is widely documented in the literature. However, a protocol to support formal soil ...classification systems combining spectral data has not been established. This research proposed a protocol for soil profile classification by combining spectral data from the near visible, shortwave infrared (Vis-NIR-SWIR) and mid infrared (MIR). For this purpose, we used 15 soil profiles located in the Pernambuco State, Brazil. A quantitative analysis between soil attributes and spectral curves was performed for the selection of bands with the best correlations (method 1). In addition, the recursive feature elimination (RFE) function was used for the selection of discriminant bands between soil profiles (method 2). The results of this research indicated that the combined use of spectra is efficient to successfully grouping Ferralsol, Gleysol, and Acrisol. The integrated use of sensors, pedometric techniques, and the expertise of soil scientists can lead to an advanced understanding of soil science.
Fire foci assessment in the Western Amazon (2000–2015) Ribeiro, Thais Marcolino; de Mendonça, Bruno Araujo Furtado; de Oliveira-Júnior, José Francisco ...
Environment, development and sustainability,
02/2021, Letnik:
23, Številka:
2
Journal Article
Recenzirano
Burning is a practice widely used by rural producers in Brazil, mainly in the Amazon region, as the main instrument to prepare the land for agriculture. In this study, we used the data of all heat ...foci in the Western Amazon, Brazil, provided by the National Institute for Space Research through its Database of Burns (
BDQueimadas
). This database often has some redundancies owing to the detection of the same burn more than once or capture of the same fire focus by different environmental satellites, resulting in an overestimation of data. In the present study, we optimize a method to reduce redundancies in an extensive database for the Western Amazon for the time period of 2000–2015, using a model for the identification and exclusion of duplicate heat foci, utilizing the ArcGIS 10.2 software. Kernel density estimates were used and correlated with average precipitation of each year obtained from Tropical Rainfall Measuring Mission (TRMM) satellite (product 3B43). From a total of 1,273,971 heat foci obtained from all environmental satellites, only 433,267 were maintained for the whole period of study (2001–2015), indicating a reduction of approximately 66%. NPP-375 (Suomi National Polar-orbiting Partnership, 375 m of spatial resolution) was the most redundant environmental satellite. The fire foci occurrence showed high correlations with rainfall as well as El Niño events. This work could also delineate areas in the Western Amazon that are most vulnerable to drought and resulting fires.
Introduction: currently, regular physical exercise is the best tool available to promote people's well-being and improve their health. Objective: the objective of the study was to determine the level ...of physical condition and nutritional status, as well as the relationship between them, in elementary school students in the city of Chillán. Methods: the study is of the descriptive, cross-sectional, relational type. A total of 2500 students participated. To evaluate physical condition, the followingtests were used: Wells and Dillons (flexibility), Sargent Test (lower limb power), AAPHARD's 1-Mile Test (cardiorespiratory resistance), and Sit-ups in 30 seconds (localized muscular resistance). Results: when comparing by sex, men presented significant statistical differences in the physical variables of aerobic capacity (p = 0.00), sit-ups (p = 0.00) and jumping (p = 0.00); only in the case of flexibility did women present better results (p = 0.01). When relating BMI to physical capacity a negative relationship is observed in both sexes-that is, the higher the BMI, the lower the amount of sit-ups (r = -0.032; r = -0.084, women and men, respectively) and aerobic capacity (r = -0.063 and r = -0.023, women and men, respectively). In flexibility and jump a positive though negligible correlation was observed. Conclusion: normal-weight men and women have a better physical condition as compared to those with overweight or obesity. As for sex, men have a better physical condition except for the flexibility test, where women obtain the best results. In addition, a negative relationship is observed in both sexes between physical condition and body composition, where a high BMI results in a low level of physical performance.
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