Essential oil composition and antioxidant and antimicrobial properties of Campomanesia pubescens O. Berg, Native of Brazilian Cerrado

In this study, the essential oil composition, total contents of phenolics and proanthocyanidins, antioxidant and antimicrobial activities from different plant parts (root, stem, leaf and fruit) of Campomanesia pubescens (DC) O. Berg from Brazilian Cerrado are reported. The root essential oil is distinguished from others by having only one representative of monoterpenes (alpha-terpenylacetate). The aerial parts of C. pubescens are rich in volatile terpenes, as expected, especially in fruits whose essential oil contained approximately 80 % of monoterpenes. The essential oils showed antimicrobial activity against oral pathogens. The root essential oil showed the strongest inhibition against Fusobacterium nucleatum (ATCC 25586). The leaf extract presented the highest concentration of phenolic and proanthocyanidins compounds. The lowest concentration necessary for inhibition of DPPH to 50 % ranged between 6.6 ± 1.6 and 56.6 ± 2.3 μg/mL. The leaf extract exhibited the highest inhibition, close to BHT.Colegio de Farmacéuticos de la Provincia de Buenos Aire

Dieta com alto teor de gordura e desempenho de tourinhos de grupos genéticos diferentes em confinamento High-fat diet and feedlot performance of bullocks of different genetic groups

O objetivo deste trabalho foi avaliar o desempenho em confinamento de tourinhos de quatro grupos genéticos distintos tratados com dietas com diferentes teores de gordura. Foram utilizados nove animais Nelore, nove Caracu, dez ½ Caracu ¼ Angus ¼ Nelore e dez ½ Red Angus ¼ Caracu ¼ Nelore, com massa corporal inicial de 227±33 kg e dez meses de idade, distribuídos aleatoriamente em dois tratamentos nutricionais: baixo teor de gordura (3,15% de extrato etéreo) e alto teor de gordura (7,28% de extrato etéreo). A ingestão de matéria seca (IMS) foi quantificada durante 208 dias e as pesagens dos animais foram realizadas a cada 28 dias. Os animais alimentados com as dietas de alto e de baixo teor de gordura apresentaram resultados similares de ganho médio diário de peso (1,511x1,487 kg por dia, respectivamente) e de eficiência alimentar (194x180 g de ganho por quilograma de MS ingerida, respectivamente); a IMS, em percentagem do peso vivo, foi menor nos animais alimentados com dieta de alto teor de gordura (2,25x2,40, respectivamente). Os animais cruzados apresentaram maior ganho de massa corporal e IMS que os Nelore. A dieta com alto teor de gordura pode ser utilizada em confinamento para melhorar o desempenho de tourinhos ½ Caracu ¼ Angus ¼ Nelore, pois é eficiente para reduzir a ingestão de matéria seca e não prejudica o ganho de massa corporal dos animais.<br>This work aimed to evaluate the feedlot performance of bullocks of four distinct genetic groups receiving diets with different levels of fat. Nine Nelore; nine Caracu; ten ½ Caracu ¼ Angus ¼ Nelore and ten ½ Red Angus ¼ Caracu ¼ Nelore bullocks, with a mean initial weight of 227±33 kg and ten months of age, were randomly assigned to two nutritional treatments and fed either with low-fat (3.15% ether extract) or high-fat diet (7.28% ether extract). Dry matter intake (DMI) was quantified during 208 days and the animals were weighed every 28 days. Animals fed with the high-fat and the low-fat diet presented similar results for average daily weight gain (1.511x1.487 kg day-1, respectively) and feed efficiency (194x180 g gain per kg DMI, respectively); the DMI, expressed as live weight percentage, was lower in animals receiving high-fat diet (2.25x2.40, respectively). Crossbred animals presented greater daily weight gain and DMI than Nelore. The high-fat diet can be used in feedlot to improve the performance of ½ Caracu ¼ Angus ¼ Nelore bullocks, since it is efficient in reducing the DMI without compromising weight gain