background: the association of duration of breastfeeding (bf)  with  weight disorders remains controversial.  this study aimed to evaluate the association of bf with anthropometric measures and weight disorders in iranian children and adolescents. materials and methods: using multistage random cluster sampling method, a representative sample of 25,000 school students were selected from urban an...

The role of neuronal regulation of human cardiovascular function remains incompletely elucidated, especially during exercise. Here we, by positron emission tomography, monitored tissue-specific blood flow (BF) changes in nine healthy young men during femoral arterial infusions of norepinephrine (NE) and phentolamine. At rest, the α-adrenoceptor agonist NE reduced BF by ~40%, similarly in muscle...

BACKGROUND Pencil beam dual energy x ray absorptiometry (DXA) has been shown to provide valid estimates of body fat (%BF), but DXA fan beam technology has not been adequately tested to determine its validity. OBJECTIVE To compare %BF estimated from fan beam DXA with %BF determined using two and three compartment (2C, 3C) models. METHODS Men (n = 25) and women (n = 31), aged 18-41 years, par...

BACKGROUND Bioelectrical impedance analysis (BIA) is widely used in clinics and research to measure body composition. However, the results of BIA validation with reference methods are contradictory, and few data are available on the influence of adiposity on the measurement of body composition by BIA. OBJECTIVE The goal was to determine the effects of sex and adiposity on the difference in pe...

The main objective of the work reported here is to assess factors that could affect the outcome of a proposed open flame test for barrier fabrics (BF-open flame test). The BF-open flame test characterizes barrier effectiveness by monitoring the ignition of a flexible polyurethane foam (FPUF) layer placed in contact with the upper side of the barrier fabric, exposed to a burner flame from below....

It is currently hypothesized that the drive to sleep is determined by the activity of the basal forebrain (BF) cholinergic neurons, which release adenosine (AD), perhaps because of increased metabolic activity associated with the neuronal discharge during waking, and the accumulating AD begins to inhibit these neurons so that sleep-active neurons can become active. This hypothesis grew from the...

OBJECTIVE The aim of this study is to investigate the relation between body mass index (BMI) and body fat (BF) among Lebanese female adolescents. METHODS 51 Lebanese females aged 12 to 18 years participated in this study. BMI was calculated as weight/height. Adiposity was measured by dual energy X-ray absorptiometry (DEXA). RESULTS Correlation coefficient of percent body fat (%BF) with BMI ...

BACKGROUND the T-786C polymorphism of the gene for endothelial nitric oxide synthase (eNOS) and superoxide anion production may reduce production and bioavailability of nitric oxide, affecting the degree of vasodilation. This effect can be reversed by exercise. OBJECTIVE to investigate the influence of aerobic training and T-786C polymorphism in the concentrations of nitric oxide metabolites ...

OBJECTIVE To evaluate the present Chinese body mass index (BMI) criteria with body fat percentage (BF%) in determining obesity in Chinese population. METHODS A total of 4 907 subjects (age: 20-90 yrs) were enrolled in the baseline survey of a longitudinal epidemiological study, and 2 638 of them were reevaluated in 5.5 years later. The Chinese BMI and WHO BF% were used to define obesity, resp...