The effect of testosterone on penis-prepucial adherences and production of fibre was studied in 30 alpacas. Animals were 18 months old and were distributed in three groups: without treatment (T0), treated with testosterone enanthate (0.5 mg/kg/body weight) every two weeks during 12 weeks (T2E), and castrated (C0). The penis-prepucial adherences, testicular size, sexual behavior and body weight were evaluated every two weeks, and fibre samples were collected at the beginning of the study and at the end of three experimental periods. In a 4-week pre-experimental phase all parameters were evaluated for adjusting the data of the experimental phase. Release of penis-prepucial adherences was greater in T2E than in T0 and C0 between weeks 8 (p<0.001) and week 12 (0.006>p<0.001). Higher testicular size (length, width, and thickness) occurred in T0 than in T2E between weeks 4and 12 (0.01>p<0.0001). Fibre diameter was similar in T2E and T0, but were greater than in C0 (p<0.05). Clean and greasy fibre weights were similar in all groups. The clean fibre yield was less in T2E than T0 and C0 in the periods II and III (0.04>p<0.0001). Body weight was greater in T2E than in T0 and C0 (p<0.05). It was concluded that the administration of testosterone to young male alpacas was effective in releasing penis-prepucial adherences and in body weight increase, but decreased the testicular size and clean fibre yield; however, did not affect the clean and greasy fibre weights, and fibre diameter.

Se evaluó el efecto de la testosterona sobre las adherencias pene-prepuciales y producción de fibra. Se usaron 30 alpacas de 18 meses de edad, distribuidas al azar en tres grupos: machos sin tratamiento (T0), machos tratados con enantato de testosterona (0.5 mg/kg/peso vivo) cada dos semanas durante 12 semanas (T2E), y machos castrados (C0). Las adherencias pene-prepuciales, tamaño testicular, comportamiento sexual y peso corporal se evaluaron cada dos semanas, y muestras de fibra se recolectaron al inicio del estudio y al final de tres periodos experimentales. Se tuvo una fase pre-experimental de cuatro semanas donde se evaluaron los parámetros en estudio para ajustar los datos de la fase experimental. La liberación de las adherencias pene-prepuciales fue mayor en T2E que en T0y C0 entre la semana 8 (p<0.001) y la semana 12 (0.006>p<0.001). El incremento testicular (largo, ancho y grosor) fue mayor en T0 que en T2E entre las semanas 4 y 12 (0.01>p<0.0001). El diámetro de fibra fue similar entre T2E y T0, pero en ambos fue mayor que en C0 (p<0.05). Los pesos de fibra sucia y limpia fueron similares en todos los grupos. El rendimiento de fibra limpia fue menor en T2E que en T0 y C0 en los periodos II y III (0.04>p<0.0001). El peso corporal fue mayor en T2E que en T0 y C0 (p<0.05). Se concluye que la administración de testosterona a alpacas machos jóvenes fue efectiva en la liberación de las adherencias pene-prepuciales e incremento del peso corporal, pero redujo el tamaño testicular y rendimiento de fibra limpia; sin embargo, no afectó los pesos de fibra sucia y limpia ni el diámetro de fibra.

In the present work, an inductively coupled plasma-tandem mass spectrometer (ICP-MS/MS) operating in single quadrupole and mass shift modes were evaluated for As determination in mineral fertilizers and agricultural gypsum with high contents of rare earth elements. For MS/MS mode, oxygen was the gas introduced into the octopole reaction system (ORS3). Samples were prepared by microwave-assisted digestion with diluted nitric acid solution. The accuracy was checked by analysis of a fertilizer certified reference material (NIST SRM 695) and by addition and recovery experiments. When operating in single quadrupole mode, recoveries ranged from 59 to 151%; while values obtained by MS/MS mode varied from 81 to 105% when 0.30 mL min-1 O2 was introduced into the ORS3. Limits of detection for As+ in single quadrupole and AsO+ in MS/MS mass shift mode were 6 and 9 ng L-1, respectively.

This work describes a procedure for determination of Cd, Ni and V in spices by high-resolution continuum source graphite furnace atomic absorption spectrometry (HR-CS GF AAS) using direct solid sampling (SS). The use of Pd/Mg(NO3)2 as modifier for Cd, and an additional air-assisted pyrolysis step allowed the use of aqueous calibration for all analytes. Accuracy was checked by analysis of certified reference materials (CRMs) and the results were in agreement to certified values at 95% confidence level (t-test). Eight samples of spices were analyzed by the proposed procedure and by inductively coupled plasma mass spectrometry (ICP-MS). The found concentrations were 88-233 ng g-1 Cd , 113-2842 ng g-1 Ni and 154-1007 ng g-1 V, with precision generally better than 12%. Results obtained by the proposed procedure were in agreement with those obtained by microwave-assisted digestion and ICP-MS determination. The limits of detection were 0.2, 18 and 7 ng g-1 for Cd, Ni and V, respectively.

Apresentamos neste artigo um relato das experiências editoriais vivenciadas na Revista Brasileira de Atividade Física & Saúde (RBAFS), no período de 2007 até o presente, desde que o periódico passou a ser uma publicação científica ofi cial da Sociedade Brasileira de Atividade Física e Saúde. Neste período, o periódico experimentou grandes avanços: a periodicidade passou a ser bimestral; houve aumento significativo do número de artigos recebidos e publicados; ocorreu a implantação da RBAFS na plataforma SEER e a associação do nosso periódico à CrossRef que passou a atribuir números DOI (Digital Object Identifier) para os artigos publicados. Além disso, a revista a partir de 2013 deixou de ser impressa, passando a disponibilizar somente a versão eletrônica, o que gerou mudança de ISSN. Os avanços alcançados pela RBAFS capacitam-na a buscar a indexação na base Scielo.

In this paper we report our experience as editors of the Brazilian Journal of Physical Activity and Health (RBAFS), particularly from 2007 onwards, when the Journal became the official publication of the Brazilian Society of Physical Activity and Health. In this period, the Journal experienced substantial improvements: it started to be published every other month there was a sharp increase in the number of papers submitted and published; the management of submission and storage was moved to the SEER platform; the Journal was indexed in CrossRef, allowing the attribution of a DOI (Digital Object Identifier) number for each article published. Besides, after 2013 the print version was no longer available and only the electronic volumes were published, resulting in ISSN alteration. These improvements now allow the journal to be eligible for indexation in Scielo.

ResumenPresentamos en ese artículo un relato de las experiencias editoriales vividas por la Revista Brasileña de Actividad Física e Salud (RBAFS), a partir de 2007 hasta el presente, desde que la misma pasó a ser una publicación científi ca oficial de la Sociedad Brasileña de Actividad Física e Salud. En este período, el periódico experimentó grandes avanzos: la periodicidad pasó a ser bimestral; hubieron aumentos significativos en los números de artículos recibidos y publicados; ocurrió la implantación de la RBAFS en la plataforma SEER y la asociación de nuestro periódico a la CrossRef que pasó a atribuir los números DOI (Digital Object Identifier) para los artículos publicados. Además, la revista, a partir de 2013, dejó de ser impresa, pasando a ser disponible solamente en la versión electrónica, esto generó cambios de ISSN. Los avanzos alcanzados por la RBAFS la capacitan a buscar la indexación en la base Scielo.

Objetivo: Analisar a fidedignidade e a validade de uma escala de apoio social para prática de atividade física para adolescentes - Escala ASAFA. Métodos: A amostra tinha 2.755 adolescentes (57,6% do sexo feminino; idade 16,5 ± 1,2 anos) do município de João Pessoa, Paraíba. Inicialmente a escala continha 12 itens: 6 para o apoio social dos pais e 6 para o dos amigos. A fidedignidade foi avaliada pelo alfa de Cronbach (α) e índice de fidedignidade combinada (IFC), a adequação do modelo com dois fatores e a invariância fatorial pela análise fatorial confirmatória (AFC). Resultados: A AFC confirmou a presença de dois fatores (fator 1: apoio social dos pais; fator 2: apoio social dos amigos), com cinco itens cada (foi excluído um item de cada escala), com cargas fatoriais elevadas (> 0,65) e índices de ajuste aceitáveis [RMR = 0,050; RMSEA = 0,063; IC90%: 0,060 - 0,067; AGFI = 0,903; GFI = 0,940; CFI = 0,934, NNFI = 0,932). A consistência interna foi satisfatória (pais: α ≥ 0,77 e IFC ≥ 0,83; amigos: α ≥ 0,87 e IFC ≥ 0,91). A invariância fatorial da escala foi confirmada (p > 0,05 para Δχ2 e ΔCFI ≤ 0,01) em todos subgrupos analisados (sexo, idade, classe econômica). A validade de construto foi constatada pela associação significativa (p < 0,05) entre o nível de atividade física e o escore de apoio social dos pais (rho = 0,29) e dos amigos (rho = 0,39). Conclusões: A escala analisada alcançou fidedignidade, invariância fatorial e validade satisfatórias, recomendando sua utilização em adolescentes.

Objective: To analyze the reliability and validity of a scale used to measure social support for physical activity in adolescents - ASAFA Scale. Methods: This study included 2,755 adolescents (57.6% girls, 16.5 ± 1.2 years of age), from Joao Pessoa, Paraiba, Brazil. Initially, the scale was consisted of 12 items (6 for social support from parents and 6 from friends). The reliability of the scale was estimated by Cronbach's alpha coefficient (α), by the Composite Reliability (CR), and by the model with two factors and factorial invariance by Confirmatory Factor Analysis (CFA) adequacy. Results: The CFA results confirmed that the social support scale contained two factors (factor 1: social support from parents; factor 2: social support from friends) with five items each (one item was excluded from each scale), all with high factor loadings (> 0.65) and acceptable adjustment indexes (RMR = 0.050; RMSEA = 0.063; 90%CI: 0.060 - 0.067); AGFI = 0.903; GFI = 0.940; CFI = 0.934, NNFI = 0.932). The internal consistency was satisfactory (parents: α ≥ 0.77 and CR ≥ 0.83; friends: α ≥ 0.87 and CR ≥ 0.91). The scale's factorial invariance was confirmed (p > 0.05; Δχ2 and ΔCFI ≤ 0.01) across all subgroups analyzed (gender, age, economic class). The construct validity was evidenced by the significant association (p < 0.05) between the adolescents physical activity level and the social support score of parents (rho = 0.29) and friends (rho = 0.39). Conclusions: The scale showed reliability, factorial invariance and satisfactory validity, so it can be used in studies with adolescents.

Objetivo: Analisar a fidedignidade e a validade de uma escala de apoio social para prática de atividade física para adolescentes - Escala ASAFA. Métodos: A amostra tinha 2.755 adolescentes (57,6% do sexo feminino; idade 16,5 ± 1,2 anos) do município de João Pessoa, Paraíba. Inicialmente a escala continha 12 itens: 6 para o apoio social dos pais e 6 para o dos amigos. A fidedignidade foi avaliada pelo alfa de Cronbach (α) e índice de fidedignidade combinada (IFC), a adequação do modelo com dois fatores e a invariância fatorial pela análise fatorial confirmatória (AFC). Resultados: A AFC confirmou a presença de dois fatores (fator 1: apoio social dos pais; fator 2: apoio social dos amigos), com cinco itens cada (foi excluído um item de cada escala), com cargas fatoriais elevadas (> 0,65) e índices de ajuste aceitáveis [RMR = 0,050; RMSEA = 0,063; IC90%: 0,060 - 0,067; AGFI = 0,903; GFI = 0,940; CFI = 0,934, NNFI = 0,932). A consistência interna foi satisfatória (pais: α ≥ 0,77 e IFC ≥ 0,83; amigos: α ≥ 0,87 e IFC ≥ 0,91). A invariância fatorial da escala foi confirmada (p > 0,05 para Δχ2 e ΔCFI ≤ 0,01) em todos subgrupos analisados (sexo, idade, classe econômica). A validade de construto foi constatada pela associação significativa (p < 0,05) entre o nível de atividade física e o escore de apoio social dos pais (rho = 0,29) e dos amigos (rho = 0,39). Conclusões: A escala analisada alcançou fidedignidade, invariância fatorial e validade satisfatórias, recomendando sua utilização em adolescentes.

Objective: To analyze the reliability and validity of a scale used to measure social support for physical activity in adolescents - ASAFA Scale. Methods: This study included 2,755 adolescents (57.6% girls, 16.5 ± 1.2 years of age), from Joao Pessoa, Paraiba, Brazil. Initially, the scale was consisted of 12 items (6 for social support from parents and 6 from friends). The reliability of the scale was estimated by Cronbach's alpha coefficient (α), by the Composite Reliability (CR), and by the model with two factors and factorial invariance by Confirmatory Factor Analysis (CFA) adequacy. Results: The CFA results confirmed that the social support scale contained two factors (factor 1: social support from parents; factor 2: social support from friends) with five items each (one item was excluded from each scale), all with high factor loadings (> 0.65) and acceptable adjustment indexes (RMR = 0.050; RMSEA = 0.063; 90%CI: 0.060 - 0.067); AGFI = 0.903; GFI = 0.940; CFI = 0.934, NNFI = 0.932). The internal consistency was satisfactory (parents: α ≥ 0.77 and CR ≥ 0.83; friends: α ≥ 0.87 and CR ≥ 0.91). The scale's factorial invariance was confirmed (p > 0.05; Δχ2 and ΔCFI ≤ 0.01) across all subgroups analyzed (gender, age, economic class). The construct validity was evidenced by the significant association (p < 0.05) between the adolescents physical activity level and the social support score of parents (rho = 0.29) and friends (rho = 0.39). Conclusions: The scale showed reliability, factorial invariance and satisfactory validity, so it can be used in studies with adolescents.