Digestibilidade da matéria seca do feno de alfafa e farelo de mamona desintoxicada pela técnica do "saco de nylon".

Comparação da digestibilidade de matéria seca do feno de alfafa e do farelo de mamona desintoxicada, pela técnica do saco de nylon, utilizando-se como repetições 2 bovinos fistulados adultos da raça holandesa

Two new cases of de novo small supernumerary marker chromosomes (sSMC) detected at prenatal diagnosis

No Abstract

Fatigue behaviour of laser repairing welded joints

This paper presents a fatigue study in Nd-YAG laser surface repairing welded joints in specimens of two base materials used in mould production. The tests were carried out in a servo-hydraulic machine in tension, under constant amplitude loading, with two stress ratios R = 0 and R = 0.4. Welded specimens were prepared with U notches and filled with laser welding deposits. The fatigue results are presented in the form of S-N curves obtained in welded and non-welded conditions. Complementary measurements of hardness and residual stresses profiles were carried out along the surface of laser welded specimens to understand the observed fatigue behaviour. The melted material was the weaker region, with lower values of hardness and higher tensile residual stresses, presenting also a high number of defects that are potential failure sites. The presence of such defects can explain the relatively poor fatigue strength of the laser repairing joints in comparison to base materials.http://www.sciencedirect.com/science/article/B6V2X-4N2M6PH-1/1/945a7f442fb922704c73d665abcb0b0

Mould steels repaired by laser welding

Laser-deposit welding, by using Nd-YAG, is a mould repairing process, which has the advantages relatively to the traditional methods of achieving a less change of the metal composition around the repaired zone and permitting a very accurate deposition of a small volume of the filler material in the area chosen at the work-piece surface. This paper presents a fatigue study in specimens of two base materials used in mould production (AISI H13 and P20). Filler material as well as welding parameters were analysed in order to obtain better fatigue strength. The tests were carried out under constant amplitude loading, with two stress ratios R = 0 and R = 0.4. Welded specimens were prepared with V notches and filled with laser welding deposits. The fatigue results are presented in the form of S-N curves obtained in welded and non-welded conditions. Complementary measurements of hardness profiles and SEM analysis were carried out to understanding the fatigue behaviour and failure sites. The laser-deposit material was the weaker region in both steels, due to a high level of tensile residual stresses and also to some planar defects that are potential failure sites. Fatigue crack initiation is therefore reduced and the fatigue propagation life is enhanced. A significant mean stress effect in the base material was also observed in both mould steels.http://www.sciencedirect.com/science/article/B6V2X-4S03RKY-3/1/b8b7da232b765381e7d08d9f3d7f897

Chemical ecology of echinoderms: Impact of environment and diet in metabolomic profile

The phylum Echinodermata constitutes a successful and widespread group comprising Asteroidea, Ophiuroidea, Echinoidea, Holothuroidea and Crinodeia. Nowadays, marine organisms are being given a lot of attention in drug discovery pipelines. In these studies, sponges and nudibranchs are frequently addressed, however an increasing number of works focus their attention in echinoderms. Given the fact that many of the bioactive molecules found in echinoderms are diet-derived, different feeding behavior and surrounding environment plays a critical role in the chemical composition of echinoderms. In this work, the most relevant chemical classes of small molecules present in echinoderms, such as fatty acids, carotenoids and sterols will be addressed. When data is available, the influence of the environment on the chemical profile of these organisms will be discussed.(undefined

SIEXP - descrição das variáveis experimentais para as culturas do trigo, triticale, centeio, cevada e canola.

Editores técnicos: Joseani Mesquita Antunes, Ana Lídia Variani Bonato, Márcia Barrocas Moreira Pimentel

Qualidade de mudas de melão produzidas em diferentes substratos.

The aim of this paper was to evaluate the development of melon seedlings grown in different substrates. The experiment was carried out in a greenhouse covered with 25% screen, at the Department of Technology and Social Sciences -DTCS of the University of the State of Bahia / UNEB, Juazeiro-BA, from July to August 2005. It was used a completely randomized experimental design with six treatments and four replications, each one consisted of 50 seedlings. The treatments composed of the substrates: Plantmax HT©; soil; sterilized soil; sugarcane residue; sugarcane residue + soil (1:1) and sugarcane residue + urea. Polystyrene trays of 200 cells were used as containers, where seeds of the AF882 melon cultivar. We sowed at 1 cm depth, using one seed per cell. The emergence percentage, average emergence time and average emergence velocity were determined. Fourteen days after sowing were evaluated seedling height, shoot and toot fresh and dry masses leaf area and chlorophyll content. The results allow one to conclude that the commercial substrate Plantmax HT© and the sterilized soil were those that provided the best melon seedlings formation

Seleção recorrente massal para porte ereto em feijão do tipo carioca.

Foi realizado o presente trabalho, com o objetivo de avaliar a eficiência da seleção recorrente massal para porte ereto no feijoeiro, o efeito dessa seleção na produtividade de grãos e verificar se ainda existe variabilidade na população que está sendo submetida à seleção recorrente, utilizando informações obtidas no ciclo cinco e no ciclo oito do programa de seleção recorrente da Universidade Federal de Lavras