Suchergebnisse

This study aims to analyze the perception of members of the Costa das Dunas Tourist Pole, in the State of Rio Grande do Norte [Brazil], regarding the potential effects of tourism in Protected Natural Áreas, especially in those that are in the process of being implemented. The state parks Mangues do Potengi, in Natal, and Jiqui, in Parnamirim, are studied. The research is exploratory, with a qualitative approach, using for data collection semi-structured interviews, followed by content analysis. It's noted that the economic aspects are highlighted in their possibility of generating employment and income for the communities. It is also noteworthy that despite tourism being seen as a significant contributor to improving the resident's quality of life, the involvement of these people in the planning and management of areas, as well as sensitizing visitors, is essential to mitigate undesirable impacts.

O presente trabalho tem como escopo discutir a constitucionalidade do poder normativo das agências reguladoras. Para isso, faz-se necessário traçar esas entidades na linha do tempo de sua evolução, assim como sua natureza jurídica e suas as características específicas para que se possa compreender sua relação e inserção no contexto social, legislativo e jurídico brasileiro. A análise não pode fugir do contexto de uma sociedade que se mostra cada vez mais técnica e complexa, exigindo do Estado atuação compatível com os problemas apresentados pelo grupo social, avaliando se a organização estatal apresenta mecanismos eficientes para atender às demandas sociais e às exigências da Constituição. É assim que se poderá perceber a compatibilidade do poder normativo das agências reguladoras com o que pede e espera a sociedade e com o que exige a Constituição, ou seja, com a concretização de direitos fundamentais, e a realização da vontade constitucional.

The objective was to evaluate the increasing levels of magnesium in the water supplied to laying quails (Coturnix coturnix japonica), kept in climatic chambers under thermoneutral temperature and thermal stress, on their performance and morphometry of their organs. The birds were distributed in a completely randomized design, 2x4 factorial arrangement, 2 temperatures (24 and 32 ºC) and 4 levels of magnesium in the water (50, 150, 250 and 350 mg L-1), with six replicates and eight birds per experimental unit. The data were subjected to analysis of variance and the means compared by the Tukey test at 5% probability level. The magnesium levels in the water did not affect (P > 0.05) the production performance and morphometry of the organs, with less water consumption at the magnesium level of 150 mg L-1, and birds kept at 32 °C had a reduction in feed consumption and feed conversion, but without affecting organ morphometry. Japanese quails in the production phase can consume water with magnesium levels up to 350 mg L-1 without having their production performance and morphometry of organs affected and raised in an environment with temperatures of up to 32 °C.

The aim of this study was to examine the use of antioxidants on the oxidative stability of poultry offal oil used in the pet food industry. Five commercial synthetic and two natural antioxidants were used in the following treatments: Control (CON); CON + (BHT + BHA + ETH95); CON + (BHT + BHA); CON + (BHA + PG + CA); CON + (BHT + BHA + ETH70); CON + BHA; CON + (ASC + rosemary); and CON + (ASC + tocopherols). Inclusion levels were 0.5% for the synthetic and 0.625% for the natural antioxidants. Oxidative stability was determined at three temperatures (90, 110 and 130 ºC). To determine the fatty acid profile, the original sample of the offal oil was considered a negative control. The fatty acids were determined based on the preparation of methyl esters by a transesterification reaction with methanol in alkaline medium, followed by gas chromatography analysis. The different fatty acid types were identified by comparing the retention times of the fatty acid methyl ester standards with the retention times of the observed peaks. Compositional data analysis was carried out. Without the use of antioxidant, induction time is shorter, resulting in lower oxidative stability of the offal oil and consequent loss of its quality due to less time taken to oxidize. The antioxidants used in CON + (BHT + BHA + ETH95), CON + (BHA + PG + CA) and CON + BHA better preserved the essential fatty acids (linolenic and linoleic). Natural antioxidants exhibited higher oxidation, with higher proportions of saturated fatty acids and the worst ω6:ω3 ratios. In conclusion, the synthetic antioxidants used in CON + (BHT + BHA + ETH95), CON + (BHA + PG + CA) and CON + BHA provided greater protection against oxidation and better preserved the essential fatty acids. The natural antioxidants tested in the present study did not provide satisfactory protection.