Abstract Background Papaya ( Carica papaya Linn.) is well known for its nutritional as medicinal value. Different parts of the plant including leaves have been used therapeutic remedies various diseases. The objective present study to determine impact different extraction methods; microwave-assisted, ultrasonic-assisted and conventional maceration on extract yield, polyphenols, flavonoids compo...

Ultrasound-assisted extraction (UAE) of phenolic compounds from Inula helenium was studied. Effects of ethanol concentration, ultrasonic time, solid-liquid ratio, and number of extractions were investigated. An orthogonal array was constructed to optimize UAE process. The optimized extraction conditions were as follows: ethanol concentration, 30%; solid-liquid ratio, 1 : 20; number of extractio...

Ultrasound-aided adsorption of phenol by Granular Activated Carbon (GAC) was investigated at different frequencies ranging from 35 kHz, 58 kHz, and 192 kHz. Other factors influencing adsorption such as Adsorbent dosage (g/L), the initial concentration of the phenol solution (ppm) and RPM was also considered along with the frequency variable. However, this study involved calorimetric measurement...

Abstract During drilling fluid preparation, ultrasonic oscillations were introduced into water-bentonite suspension incorporating sulfonated wood coal (SMC) by a specially designed device. The influences of on loss and rheological performances the as well mechanism action investigated. experimental results showed that filtrate volume decreased with increase time till certain extent then leveled...

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 ...

Ultrasound operators in assisted reproductive technology units in New South Wales, Australia cooperated in a study that was conducted to assess their ability to measure fixed objects embedded in an ultrasound phantom. The results have demonstrated a large variation ranging between 10 and 25% coefficient of variation on distances between 10 and 32 mm. As ultrasonic imaging is the only component ...

The effect of ultrasonic vibration on the springback and surface property for ultrasonic-assisted incremental sheet forming aluminum alloy were discussed. A series experiments established to explore symmetrical in order facilitate analysis experimental results. It is obtained that application can reduce effect. waviness feature becomes weaker with continuous increase amplitude topography tends ...

Ultrasonic-assisted green synthesis of silver nanoparticles is gaining more attention owing to its benefits over conventional process. The main objective this study was synthesize with aqueous cinnamon extract using ultrasound-assisted extraction and their physico-chemical characterization. Total phenolic content, DPPH, FRAP were 315 mg GAE/g, 89% scavenging activity 9.5 mmol Trolox eq/100 g re...

This paper presents structural, morphological and preliminary ultrasonic characterizations of the β-Cyclodextrin/hydroxyapatite (CD-HAp) composites synthesized by an adapted co-precipitation method. The structural and morphological properties were evaluated by Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Spectroscopy (EDX). The specific surface area, pore size and pore volume ...