In five supine normal subjects breathing spontaneously, we studied the effects of high-frequency chest wall oscillation (HFCWO), which was achieved by oscillating the pressure in an air-filled cuff wrapped around the lower thorax. Oscillations of 3.5 and 8 Hz (in randomized order) were applied for 15 minutes each at both maximal (mean of 90 to 102cm H,O) and half-maximal peak tolerable cuff pre...

Background This study investigated the effect of post bleaching treatments to the change of enamel elastic modulus and microhardness after dental bleaching in- vitro. Material and Methods Fifty bovine incisor slab were randomly assigned into five groups (n=10). The samples were bleached for three times; 20 minutes each time, by 40% hydrogen peroxide. Next it was applied fractional CO2 laser f...

This study is based on optimizing the experimental conditions of biodiesel production by base-catalyzed transesterification using waste cooking oil (WCO). In this study, the key parameters varied were methanol (20, 25, 30, 35, and 40%), sodium hydroxide (0.4, 0.6, 0.8, 0.9 and 1.0g), reaction time (40, 60, 90, 100 and 120 minutes) and reaction temperature (50, 52, 55, 58, and 60 C). Maximum bio...

vibration generated by vehicles during road transport has an important effect on the agricultural products damage process, particularly vegetable and fruit. modulus of elasticity is one of the most important mechanical properties of fruits and its variation can be described as one of the damage criteria during transportation. this research was conducted to evaluate the effects of vibration para...

Capsaicin induces a localized inflammatory process known as neurogenic inflammation upon its topical administration on the skin, due to the release of various neuropeptides from the cutaneous sensory nerve endings. In this study, we investigated real-time skin blood flow changes that occur in neurogenic inflammation induced by topical capsaicin by means of in vivo reflectance confocal microscop...

in an attempt to diminish the intensity of vertigo, this study was designed to reduce the imbalance between the vestibular system on the two sides. by rotating the subjects with a string-activated rotating chair in opposite direction of the dominant side, the dominant side would be inhibited and simultaneously the subordinate ide would be stimulated. eight patients with vestibular vertigo confi...

BACKGROUND AND PURPOSE The present study examined the relationship between circulatory and metabolic reserve in patients with hemodynamic impairment. METHODS Positron emission tomography was used to investigate 40 patients with major cerebral artery occlusive disease. The ratio of cerebral blood volume to cerebral blood flow (CBV/CBF) and vasoreactivity in response to hypercapnia (%CBF(hyperc...

Abstract Objectives: Essential tremor (ET) is a disabling condition resulting from cerebello-thalamo-cortical circuitry dysfunction. Deep brain stimulation of the thalamic ventral intermediate nucleus (VIM-DBS) effective in managing severe postural and action tremor. Non-invasive electrical cerebellum has recently emerged as potential therapeutic option for these patients. In this study, we aim...

According to the 3rd Generation Partnership Project specification, a period of 8-12.8 hours is required evaluate multiple-input-multiple-output (MIMO) performance wireless terminal for single frequency point and channel model combination. The following paper proposes semi-simulation, semi-measurement-based MIMO throughput modeling scheme which can reduce hour measurement time 40-60 minutes, cor...

objective: the aims of this study were to determine the frequency of urinary and fecal incontinence and their determinants in pre-menopausal and menopausal women in iran. materials and methods: this one-year cross-sectional study was performed on 304 women aged 40-55 who were admitted to women's clinic at imam khomeini hospital. symptoms of urinary, gas, and fecal incontinence and pelvic organs...