Concentrações de ácido indolbutírico na propagação do umezeiro por alporquia.

201

Língua Azul: uma nova doença que pode comprometer o rebanho brasileiro.

bitstream/item/51986/1/Midia-Lingua-azul.pf.pdfDisponível também: Nordeste Rural. Seção Ciência no Campo, 3 mar. 2004. Disponível em: . Acesso em: 8 mar. 2004

Isolamento e caracterização de Flavobacterium columnare de tambaqui (Colossoma macropomum).

O objetivo deste estudo foi de realizar o isolamento e a caracterização de Flavobacterium columnare de tambaqui (Colossoma macropomum) criado em tanques escavados na região de Rio Preto da Eva - AM

KINEMATIC GAIT VARIABLES OF ELDERLY WOMEN WITH DIFFERENT LEVEL OF PHYSICAL ACTIVITY

The aging of populations is an international phenomena caused by the decline of birthrate and the progress of medical science. According to WHO individuals older than 65 years in developed countries and older than 60 years in developing countries are considered elderly. The aging process is characterized by the decrease of muscle mass, strength and power, one of the most important reasons for the decrease of functional abilities and the increase of falling risk (Zhong et al., 2007). Nevertheless, physical activity may retard this process. The principal changes in kinematic gait variables are the decrease of gait velocity, stride length and single support time with an increase of double support time (McGibbon,2003). These changes in gait pattern observed in the elderly population may arise from functional declines of aging and may be even more significant in the absence of appropriate regular physical exercises. Considering the higher proportion of women in the elderly population (WHO, 2002), it is important to understand the changes in gait patterns of elderly women related to physical activity. Therefore, the purpose of this study was to identify the effects of different intensities of physical activity on the cinematic gait variables in older women

High coercivity induced by mechanical milling in cobalt ferrite powders

In this work we report a study of the magnetic behavior of ferrimagnetic oxide CoFe2O4 treated by mechanical milling with different grinding balls. The cobalt ferrite nanoparticles were prepared using a simple hydrothermal method and annealed at 500oC. The non-milled sample presented coercivity of about 1.9 kOe, saturation magnetization of 69.5 emu/g, and a remanence ratio of 0.42. After milling, two samples attained coercivity of 4.2 and 4.1 kOe, and saturation magnetization of 67.0 and 71.4 emu/g respectively. The remanence ratio MR/MS for these samples increase to 0.49 and 0.51, respectively. To investigate the influence of the microstructure on the magnetic behavior of these samples, we used X-ray powder diffraction (XPD), transmission electron microscopy (TEM), and vibrating sample magnetometry (VSM). The XPD analysis by the Williamson-Hall plot was used to estimate the average crystallite size and strain induced by mechanical milling in the samples