Tough, sensitive and sincere : how adolescent boys manage masculinities and emotions

This study aimed to explore adolescent boys’ views of masculinity and emotion management and their potential effects on well-being. Interviews with 33 adolescent boys aged 16–17 years in Sweden were analysed using grounded theory. We found two main categories of masculine conceptions in adolescent boys: gender-normative masculinity with emphasis on group-based values, and non-gender-normative masculinity based on personal values. Gender-normative masculinity comprised two seemingly opposite emotional masculinity orientations, one towards toughness and the other towards sensitivity, both of which were highly influenced by contextual and situational group norms and demands, despite their expressions contrasting each other. Non-gender-normative masculinity included an orientation towards sincerity emphasising the personal values of the boys; emotions were expressed more independently of peer group norms. Our findings suggest that different masculinities and the expression of emotions are strongly intertwined and that managing emotions is vital for well-being.

Moto-boys de Porto Alegre : convivendo com os riscos do acidente de trânsito

Esta dissertação tem por objetivo geral investigar de que modo os moto-boys vêem o risco do acidente de trânsito no seu cotidiano de trabalho, na cidade de Porto Alegre. O estudo foi realizado com base nas teorias sociológicas sobre ‘risco’, em especial as que enfatizam o caráter sociocultural dos seus significados. A pesquisa foi desenvolvida numa perspectiva qualitativa e seguiu os procedimentos metodológicos da Teoria Fundamentada nos Dados. A técnica de grupo focal foi a estratégia utilizada para a coleta dos dados. Os resultados da análise apontam que os ‘riscos do acidente de trânsito’ são produzidos por interesses pessoais e sociais no sentido das demandas por velocidade e urgência em relação ao interesse em ganhar mais e se manter empregado. Os moto-boys consideram os riscos de acidente de trânsito inerentes ao cotidiano do seu trabalho e tentam controlar estes riscos utilizando estratégias de autocuidado.

Reproductive performance of prepubertal Bos indicus heifers after progesterone-based treatments

The objective was to evaluate the effects of exogenous progesterone (P4) on reproductive performance of prepubertal Bos indicus heifers. Prepubertal Nelore heifers (n = 589; 24.0 +/- 1.13 mo; 298.0 +/- 1.89 kg; body condition score of 3.2 +/- 0.26; mean +/- SEM) were randomly assigned to receive, between experimental Days -12 and 0: no treatments (CIDR0; n = 113); a new intravaginal insert (CIDR) containing 1.9 g of P4 (CIDR1; n = 237); or a similar insert previously used three times, with each use occurring for 9 d (CIDR4; n = 239). An additional treatment group was pubertal heifers given 12.5 mg dinoprost tromethamine im on Day 0 (PGF; n = 346), and used as controls for evaluation of conception rates. on Day 0, transrectal palpation was done for uterine score evaluation (UtS; 1-3 scale), blood samples were taken for serum P4 concentrations, and follicle diameter (FD) was measured. The breeding season started on Day 1 and consisted of AI after detection of estrus between Days I and 45, and exposure to bulls between Days 46 and 90. There were effects of treatment (P < 0.05) on serum concentrations of P4 on Day 0 (0.37 +/- 0.16, 2.31 +/- 0.11, and 1.20 +/- 0.11 ng/mL for CIDR0, CIDR1, and CIDR4, respectively; mean SEM), FD on Day 0(9.45 +/- 0.24, 9.72 +/- 0.17, and 11.42 +/- 0.16 mm), UtS on Day 0 (1.49 +/- 0.06, 1.88 +/- 0.04, and 2.24 +/- 0.04), estrus detection rates at 7 d (19.5, 42.6, and 38.3%) and 45 d (52.2, 72.1, and 75.3%) of the breeding season, and on pregnancy rates at 7 d (5.3, 14.3, and 18.4%), 45 d (27.4, 39.2, and 47.7%) and 90 d (72.6, 83.5, and 83.7%) of the breeding season. Conception rate 7 d after the start of the breeding season was greater (P < 0.05) in heifers from the CIDR4 (46.8%) and PGF (43.8%) groups than in the CIDR0 (27.3%) and CIDR1 (33.7%) groups. In conclusion, exogenous P4 hastened puberty and improved pregnancy rates at the beginning of the breeding season in prepubertal Bos indicus heifers. Furthermore, previously used CIDR inserts were better than new inserts. (C) 2010 Elsevier B.V. All rights reserved.

Late morfofunctional alterations of the Sertoli cell caused by doxorubicin administered to prepubertal rats

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Influence of the banded Herbst appliance on dental changes in mixed dentition

OBJECTIVE: This prospective clinical study was conducted with the purpose of evaluating the influence of the banded Herbst appliance on dental changes during the early treatment of Class II malocclusion. METHOD: The sample consisted of 15 prepubertal subjects (12 boys and 3 girls, initial age: 9 years and 6 months) who were treated with the Herbst appliance. Treatment effects were compared with those of a Class II Division 1 group of 15 subjects (8 boys and 7 girls, mean initial age 9 years and 1 month), not treated orthodontically. Statistical analysis was performed using Student t-test with 5% significance level. RESULTS: The results showed that treatment with the banded Herbst appliance in the mixed dentition stage tended to upright maxillary incisors (mean: 4.14°). The maxillary molars were distalized and intruded significantly (mean 2.65 mm and 1.24 mm, respectively), the lower incisors slightly protruded anteriorly (mean 1.64 mm) and the molars showed no significant changes in the horizontal and vertical directions. Furthermore, significant improvements were noted in overbite (1.26 mm), overjet (4.8 mm) and molar relationship (12.08 mm). CONCLUSIONS: Changes in the upper dental arch were found to be greater than changes in the lower arch. Furthermore, mandibular anchorage loss was reduced due to the anchorage system used in the study.