BACKGROUND Ultrasonic energy transmitted via flexible wire probes provides a new means of ablating atherosclerotic plaque. We studied the effects of ultrasonic energy (20 kHz) delivered via a ball-tipped wire probe on arterial vasomotor behavior in rabbit thoracic aortas in a perfused whole-vessel model. METHODS AND RESULTS After precontraction with phenylephrine (10(-5) M) or KCl (60 mM), th...

Ultrasonic treatment of the tails of Triturus alpestris tadpoles, at intensities of 8 to 15 watts/cm(2), at 1 megacycle/sec., for 5 minutes, disrupted the epidermis and caused pycnosis in individual cells of the muscle and neural tube, but caused no damage to the notochord that could be detected by light microscopy. Electron microscopy showed that this ultrasonic treatment disordered nearly all...

Red pitaya is a tropical fruit rich in phytonutrients essential for human health. The savored either through its processed products or raw consumption. This study aimed to assess the physicochemical properties of red juice extracted from ultrasonic-pretreated flesh. flesh was cut into cubes and subjected different durations (20, 40, 60 min) ultrasonic treatment. total soluble solids, pH, titrat...

Sludge production in wastewater treatment plants is increasing worldwide due to the increasing population. This work investigated the effects of ultrasonic (ULS), ultrasonic-ozone (ULS-Ozone) and ultrasonic + alkaline (ULS+ALK) post-treatments on the anaerobic digestion of sewage sludge in semi-continuous anaerobic reactors. Three conditions were tested with different hydraulic retention times ...

The treatment time needed for high-intensity focused ultrasound (HIFU) ablation might be decreased substantially by using the split-focus approach, so we made a prototype 4.2-MHz split-focus therapeutic transducer combined with a small 6.5-MHz imaging ultrasonic probe for transrectally treatment of canine prostatic cancer and used it to experimentally evaluate the feasibility of using split-foc...

This study focused on the effects of ultrasound on the catalytic activity of cellulase preparation. Diluted Celluclast 1.5L in citrate buffer was treated by ultrasound with different variables. The catalytic activity of the treated and untreated enzymes was determined against soluble and insoluble substrates. Changes in ultrasonic intensity and sonication time significantly affected the enzyme ...