نتایج جستجو برای: ultrasound assisted microextraction
تعداد نتایج: 237824 فیلتر نتایج به سال:
This review examines studies of intra-operative contrast-enhanced ultrasound (CEUS) and its emerging role and advantages in robotic-assisted nephron-sparing surgery. Contrast-enhanced ultrasound is a technology that combines the use of second-generation contrast agents consisting of microbubbles with existent ultrasound techniques. Until now, this novel technology has aided surgeons with proced...
Laparoscopic Assisted ultrasound guided Percutaneous Nephrolithotomy (PCNL) in Ectopic Pelvic Kidney
We report a patient with pain, abdominal palpable mass and a history of previous open renal stone surgery. Imaging studies showed a right pelvic kidney with multiple calyceal stones. We describe the successful management through laparoscopic assisted percutaneous nephrolithotomy with ultrasonography (PCNL) in ectopic pelvic kidney, stressing that this method is a minimally invasive therapeutic...
This paper presents a method to reduce the invasiveness of Computer Assisted Orthopaedic Surgery (CAOS) using ultrasound. In this goal, we need to develop a method for 3D/4D ultrasound registration. The premilinary results of this study suggest that the development of a robust and “realtime” 3D/4D ultrasound registration is feasible.
Ultrasound can be used both simultaneously or as a pretreatment technique for flotation to produce higher combustible recoveries, higher heat values, and lower ash data from raw hard coals. The recent research works have indicated that modifying coal surfaces, especially physical surface cleaning with the help of the cavitation process created by power ultrasound at certain frequency and time i...
The ultrasound-assisted hydrolysis of aspirin methyl ester (AME) was investigated using immobilized Candida antarctica lipase B (CALB) (1%) in the presence of solvents like triolein, chloroform (CHCl3) and dichloromethane (DCM). The effect of ultrasound and the role of water on the conversion rates have also been investigated. Proton nuclear magnetic resonance spectroscopic (1H NMR) was chosen ...
In the present research, salting out and vortex assisted dispersive liquid–liquid microextraction based on solidification of floating organic drop microextraction (SO-VADLLME-SFODME) for the extraction and determination of phenol and chlorophenols in water samples followed by HPLC have been studied through a novel, simple, low-cost, selectable and environment friendly (so called green) method....
The application of ultrasound with electrochemistry in organic chemistry (known as sonoelectrochemistry) accelerates the activation process chemical reactions. This hybrid technology enhances electrical efficiency and modifies increases product yield. Moreover, it facilitates mass transfer phenomena processes cleaning, degassing, electrode surfaces; maintains higher current densities for effici...
Jatropha curcas has a variety of uses which are of great economic significance. Jatropha oil can be used as fuel alternative and for making biodiesel that is supposed to overcome the source limitation problem. In this study, conventional, ultrasound assisted and microwave pretreatment solid liquid extraction of Jatropha seed were studied in terms of amount and quality of the extracted oil. The ...
INTRODUCTION The objective of this study was to compare three capsaicin extraction methods: Shoxlet, Ultrasound-assisted Extraction (UAE), and Shaker-assisted Extraction (SAE) from Habanero pepper, CNPH 15.192. MATERIALS AND METHODS The different parameters evaluated were alcohol degree, time extraction, and solid-solvent ratio using response surface methodology (RSM). RESULTS The three par...
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