Estimativas das exigências de lisina de frangos de corte pelos métodos dose resposta e fatorial

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

The impact of the Board of Director's composition on companies performance

The impact of the Board of Directors’ composition on companies’ performance This paper studies the impact that the board of directors’ composition has on companies’ performance in the Italian market. The research has been carried out by using a sample of 10 Italian companies, across different market sectors, over a period of 10 years (2005-2014). The characteristics of the BoD taken into consideration are the following: board size, board diversity (% of female directors), board independence and CEO duality. Results from the sample data collected concluded that these factors have a statistically significant impact on the performance of the companies that have been analysed.

The odd bod, the icon and the modest woman : the differences and similarities amongst three Australian women music teachers, performers and composers

Throughout Australia's history there have been many women who have been active in music education, performance and composition, despite the traditional family commitments which women have negotiated, overcoming prevailing negative attitudes to success outside the home. The period 1900 to 1950 in Australia saw significant changes in the social structure such as universal suffrage, Federation and World War 1. These changes broadened opportunities for some women to negotiate a life-time career in music. The researcher has identified three significant women who were able to forge careers in music during this time in music teaching, composition and performance. The women were Mona McBurney, Ruby Davy and Ruth Flockart. The selected women were all unique; McBurney was an outstanding composer for her time, being the first woman in Australia to compose an opera. Also, she was the first woman in Australia to gain her Bachelor of Music. Despite these successes, she had a reputation for her overwhelming modesty and shyness. Davy was significant because of her diversified ability as a teacher, performer, composer and elocutionist, and because she was the first woman in Australia to gain her Doctorate of Music. Davy has been described by several people as unusual, strange, and an 'odd bod'. Flockart was a music teacher at Methodist Ladies' College Melbourne for almost fifty years, half of those as the Director of Music. She was a significant figure in contemporary music education, particularly as a choral conductor, where she has been described as an 'icon'. This research looks at the differences and similarities amongst these three women in terms of family life, social position, education and support systems, and their ability to negotiate a career in music teaching, performance and composition.

Characterization of commercial double-walled carbon nanotube material : composition, structure, and heat capacity

A purified commercial double-walled carbon nanotube (DWCNT) sample was investigated by transmission electron microscopy (TEM), thermogravimetry (TG), and Raman spectroscopy. Moreover, the heat capacity of the DWCNT sample was determined by temperature-modulated differential scanning calorimetry in the range of temperature between -50 and 290 °C. The main thermo-oxidation characterized by TG occurred at 474 °C with the loss of 90 wt% of the sample. Thermo-oxidation of the sample was also investigated by high-resolution TG, which indicated that a fraction rich in carbon nanotube represents more than 80 wt% of the material. Other carbonaceous fractions rich in amorphous coating and graphitic particles were identified by the deconvolution procedure applied to the derivative of TG curve. Complementary structural data were provided by TEM and Raman studies. The information obtained allows the optimization of composites based on this nanomaterial with reliable characteristics.

Ethnic differences in body composition and anthropometric characteristics in Australian Caucasian and urban Indigenous children

The objective was to compare ethnic differences in anthropometry, including size, proportions and fat distribution, and body composition in a cohort of seventy Caucasian (forty-four boys, twenty-six girls) and seventy-four urban Indigenous (thirty-six boys, thirty-eight girls) children (aged 9–15 years). Anthropometric measures (stature, body mass, eight skinfolds, thirteen girths, six bone lengths and five bone breadths) and body composition assessment using dual-energy X-ray absorptiometry were conducted. Body composition variables including total body fat percentage and percentage abdominal fat were determined and together with anthropometric indices, including BMI (kg/m2), abdominal:height ratio (AHtR) and sum of skinfolds, ethnic differences were compared for each sex. After adjustment for age, Indigenous girls showed significantly (P < 0·05) greater trunk circumferences and proportion of overweight and obesity than their Caucasian counterparts. In addition, Indigenous children had a significantly greater proportion (P < 0·05) of trunk fat. The best model for total and android fat prediction included sum of skinfolds and age in both sexes (>93 % of variation). Ethnicity was only important in girls where abdominal circumference and AHtR were included and Indigenous girls showed significantly (P < 0·05) smaller total/android fat deposition than Caucasian girls at the given abdominal circumference or AHtR values. Differences in anthropometric and fat distribution patterns in Caucasian and Indigenous children may justify the need for more appropriate screening criteria for obesity in Australian children relevant to ethnic origin.