Cortical rhythms have been thought to play crucial roles in our cognitive abilities. Rhythmic activity in the beta frequency band, around 20 Hz, has been reported in recent studies that focused on neural correlates of attention, indicating that top-down beta rhythms, generated in higher cognitive areas and delivered to earlier sensory areas, can support attentional gain modulation. To elucidate...

There is ongoing discussion whether cellular or mobile phone has any effects on brain. The aim of this research is to investigate the effects of mobile phone use on left and right ear using electroencephalograph (EEG). The brain waves are analyzed using Wavelet transform and Fast Fourier Transform. Twenty subjects are studied after recording their EEG signals using International 10/20 system of...

We studied 60 children affected with idiopathic nephrotic syndrome (INS) plus 20 age and sex matched controls. The children with INS were divided into 3 groups of 20: first presentation, remission and relapse. A complete blood picture and complete urinalysis were done. Serum interleukin (IL)-1beta, IL-6, tumour necrosis factor (TNF) and quantitative urinary beta-2-microglobulin (beta-2-m) excre...

Ni-H-Beta catalysts for ethylene oligomerization (EO) were prepared by ion exchange of NH4-Beta and H-Beta zeolites with aqueous Ni(NO3)2 characterized H2-temperature-programmed reduction (TPR), NH3-temperature-programmed desorption (TPD), diffuse-reflectance infrared Fourier-transform spectroscopy (DRIFTS). Quadruple at 70 °C resulted in 2.5 wt.% Ni loading corresponding to a Ni2+/framework al...

This study investigated whether ERPs from an inter-modal oddball task could distinguish between two groups of children with Attention-Deficit/Hyperactivity Disorder (AD/HD) of the combined type, with and without excess beta in their EEG, and controls. Three age-matched groups of male children (20 typical AD/HD without excess beta, 20 AD/HD with excess beta, 20 controls) were presented with an i...

The role of mitochondria in stimulus-secretion coupling of pancreatic beta-cells was examined using methyl pyruvate (MP). MP stimulated insulin secretion in the absence of glucose, with maximal effect at 5 mM. K+ (30 mM) alone, or in combination with diazoxide (100 microM), failed to enhance MP-induced secretion. Diazoxide (100 microM) inhibited MP-induced insulin secretion. MP depolarized the ...

OBJECTIVE Stimulus-driven salience is determined involuntarily, and by the physical properties of a stimulus. It has recently been theorized that neural coding of this variable involves oscillatory activity within cortical neuron populations at beta frequencies. This was tested here through experimental manipulation of inter-stimulus interval (ISI). METHODS Non-invasive neurophysiological mea...

INTRODUCTION Beta-adrenergic agonists are highly abused by sportspeople for their muscle anabolic and lipolytic effects. Muscle growth effects are thought to result from beta-2 adrenoceptor activation. This study attempted to characterise muscle (gastrocnemius) tissue damage following the administration of isoproterenol. METHODS Adult male Balb-C mice were treated with a single oral dose of i...