نتایج جستجو برای: Ultrasound energy

تعداد نتایج: 772449  

پایان نامه :دانشگاه تربیت معلم - سبزوار - دانشکده برق و کامپیوتر 1392

در حال حاضر چندین روش برای اندازه گیری چربی زیرپوستی بدن در حوزه های بالینی وجود دارد ، مانند : magnetic resonance imaging(mri)، (computer tomography(ct، ultrasound imaging(us) ، dual energy x-ray absorptiometry(dexa). این روش ها بطور وسیعی در حوزه های بالینی به عنوان وسایل دقیق و مفید ، مورد استفاده قرار می گیرند. به هر حال این روش ها محدودیت های زیادی مانند هزینه بالا و یا خطر تابش اشعه را دا...

میلانی‌مقدم, حسین, نصیریان, شهروز,

 In this letter, titanium dioxide nanoparticles (TiO2) were synthesized via a sol-gel method and combining titanium tetrachloride (TiCl4) and ethanol. The activation energy was investigated on the phase transformation from anatase to rutile in the presence and absence of ultrasound waves. The anatase nanocrystallites were only crystallized up to the calcination of 500 º C. By increasing the cal...

In this study, the effect of ultrasound irradiation on the flux recovery and fouling mitigation for the membranes made of the polysulfone by the phase inversion method were investigated. Two ultrasound irradiation regimes, including inside and outside the module, were chosen for this study. The experiments were conducted to investigate the effect of ultrasound irradiation on the membrane struct...

Journal: :بینا 0
محسن رحمتی کامل m rahmati-kamel shahid beheshti university of medical sciencesمرکز چشم پزشکی هلال ایران علیرضا برادران رفیعی ar baradaran-rafii shahid beheshti university of medical sciencesدانشگاه علوم پزشکی شهید بهشتی ویکتوریا کیاوش v kiavash shahid beheshti university of medical sciencesدانشگاه علوم پزشکی شهید بهشتی بهرام عین الهی b einollahi shahid beheshti university of medical sciencesدانشگاه علوم پزشکی شهید بهشتی فرید کریمیان f karimian shahid beheshti university of medical sciencesدانشگاه علوم پزشکی شهید بهشتی سیدعلی میردهقان a mirdehghan shahid beheshti university of medical sciencesدانشگاه علوم پزشکی شهید بهشتی محمد زارع

purpose: to evaluate the effect of vacuum and flow rate on endothelial cell loss after high versus low vacuum phacoemulsification. methods: this randomized clinical trial was performed on 60 eyes of 60 patients with moderate lens opacity (nuclear sclerosis 3+). all surgeries were performed by one experienced surgeon using stop and chop technique with sovereign white star machine (amo). patients...

Journal: Nanomedicine Journal 2018

Physical drug delivery through smart nanocarrier and external stimulus could lead to significant improvements of drug potency as well as noticeable decrease in unwanted side effects. Currently, many external energy sources such as light, magnetic fields, ultrasound, ...,  are under investigation as external stimulus for physical drug delivery. The purpose of this paper is to review most recent ...

Journal: :iranian biomedical journal 0
ژامک اخلاقی zhamak akhlaghi جلال ایزدی مبارکه jalal izadi mobarakeh مهرداد مختاری mehrdad mokhtari حمید بهنام hamid behnam امیرعباس رحیمی amir abbas rahimi محمد صالح خواجه حسینی mohammad saleh khajeh hosseini فرزانه سمیعی

background: initial studies have shown that low-energy ultrasound stimulates living tissue cells to reduce regeneration or speed up their recovery. the purpose of this study was to examine the effects of various ultrasound parameters on the speed of recovery in injured sciatic nerves. methods: nmri mice (n = 200) with injured left paw, caused by crushing their sciatic nerves, were randomly sele...

The ability to sense and respond to physical stimuli is an important key of the life. It was recognized that ultrasound as a physical stimulus could produce drastic changes in biological systems. High-intensity ultrasound is well known to be destructive to biological materials, but low-intensity ultrasound, on the other hand, has shown a range of biological effects with potential significance i...

Amir Abbas Rahimi, Farzaneh Samiee, Hamid Behnam, Jalal Izadi Mobarakeh, Mehrdad Mokhtari, Mohammad Saleh Khajeh Hosseini, Zhamak Akhlaghi,

Background: Initial studies have shown that low-energy ultrasound stimulates living tissue cells to reduce regeneration or speed up their recovery. The purpose of this study was to examine the effects of various ultrasound parameters on the speed of recovery in injured sciatic nerves. Methods: NMRI mice (n = 200) with injured left paw, caused by crushing their sciatic nerves, were randomly sel...

Journal: :مهندسی بیوسیستم ایران 0
رضا یگانه استادیار گروه مهندسی مکانیک ماشین‏های کشاورزی، دانشکدۀ کشاورزی، دانشگاه ایلام راضیه باباگل تبار کارشناس ارشد مهندسی مکانیک ماشین‏های کشاورزی عادل حسین پور استادیار گروه مهندسی مکانیک ماشین‏های کشاورزی، دانشکدۀ کشاورزی، دانشگاه ایلام

tea is one of the most important medicinal plants which have a considerable effect on the treatment of cardiovascular disease and cancer. the drying process of tea leaves is carried out by hot air flow which consumes high level energy. the aim of the recent research was to investigate the procedure of high power ultrasound-assisted drying process of tea leaves. hybrid variety of chinese tea was...

In the present study, an attempt has been made to synthesize 3-methyl-4-arylmethylene isoxazole-5(4H)-one derivatives through sonication of hydroxylamine hydrochloride, ethyl acetoacetate and benzaldehyde derivatives in the presence of imidazole as a novel and effective catalyst in aqueous media. This green reaction under ultrasound irradiation has advantageous compared to conventional...

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