نتایج جستجو برای: pulse effect

تعداد نتایج: 1718619  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی (نوشیروانی) بابل - دانشکده مهندسی شیمی 1390

روش های متعددی برای جداسازی این نوع امولسیون ها وجود دارد، تکنیک انعقاد الکتریکی یکی از روش ها برای حذف روغن از امولسیون است. از این تکنولوژی برای تصفیه پساب های روغنی صنایع پتروشیمی و پالایشگاهی و جداسازی آب و نمک موجود در نفت خام استفاده شده است. هدف از انجام این آزمایشات جداسازی بنزن از امولسیون بنزن در آب با استفاده از میدان الکتریکی غیر یکنواخت بوده است. بدین منظور از یک ظرف جداساز 3 جداره...

Journal: :مجله دانشگاه علوم پزشکی قم 0
محمدرضا یگانه خواه mohammad reza yeganehkhah qom university of medical sciencesدانشگاه علوم پزشکی قم سیدحسن عادلی seyed hassan adeli qom university of medical sciencesدانشگاه علوم پزشکی قم مصطفی واحدیان mostafa vahedian qom university of medical sciencesدانشگاه علوم پزشکی قم تهمینه دادخواه تهرانی tahmineh dadkhah tehrani qom university of medical sciencesدانشگاه علوم پزشکی قم حسین اکبری hossein akbari qom university of medical sciencesدانشگاه علوم پزشکی قم سکینه روشنی مبارکی sakineh roshani mobaraki qom university of medical sciencesدانشگاه علوم پزشکی قم زهرا نراقی پورآرانی

background and objectives: pulse oximetry is the most common technique for monitoring hemoglobin oxygen saturation (spo2). different colors and brands of nail polish may cause disturbance in the reading and interpretation of oxygen saturation. the aim of this study was to determine the effect of different colors of nail polish on oxygen saturation measured by pulse oximeter. methods: thirty hea...

Journal: :cell journal 0

objective: in electrochemotherapy (ect), there is an unpleasant sensation of muscle contraction when using a low frequency (1 hz). therefore, by increasing the pulse frequency above the tetanic frequency this painful sensation can be reduced. the aim of the present study is to compare the treatment efficiencies of low and high frequency ect, and estimate the effect of its repeated sessions. mat...

In the present study, the optimization of pulsed Nd:YAG laser welding parameters was done on a lap-joint of a 316L stainless steel foil in order to predict the weld geometry through response surface methodology. For this purpose, the effects of laser power, pulse duration, and frequency were investigated. By presenting a second-order polynomial, the above-mentioned statistical method was manage...

Journal: :مهندسی متالورژی و مواد 0
پریسا وحدت خواه سید خطیب الاسلام صدرنژاد

comparison of the effects of two substrates and additives on pulse current electrodeposition of au nanoparticles showed that using indium-tin oxide instead of cu and cysteine instead of potassium iodide can improve morphology, current efficiency, photocatalytic effect and increase the number of nanocrystals. the examinations using the field-emission scanning-electron-microscope (fe-sem) showed ...

Leila Azimi, Mohammad Javan, Narges Hoseinmardi, Naser Naghdi, Yaghoub Fathollahi,

Abstract* Introduction: Chronic morphine exposure can cause addiction and affect synaptic plasticity, but the underlying neural mechanisms of this phenomenon remain unknown. Herein we used electrophysiologic approaches in hippocampal CA1 area to examine the effect of chronic morphine administration on short-term plasticity. Methods: Experiments were carried out on hippocampal slices taken f...

عادلی, سیدحسن, اکبری, حسین , دادخواه تهرانی, تهمینه , روشنی مبارکی, سکینه , نراقی پورآرانی, زهرا , واحدیان, مصطفی , یگانه‌خواه, محمدرضا ,

Background and Objectives: Pulse oximetry is the most common technique for monitoring hemoglobin oxygen saturation (SpO2). Different colors and brands of nail polish may cause disturbance in the reading and interpretation of oxygen saturation. The aim of this study was to determine the effect of different colors of nail polish on oxygen saturation measured by pulse oximeter. Methods: Thirty he...

Watt’s bath and pulse reverse (PR) electrodeposition is used to produce spherical nickelmultiwall carbon nanotubes (Ni-MWCNT) of 2.00, 0.93, 1.63 and 6.71 μm diameter and a variety ofsize distributions. For 60 cycles, an absolute electrodeposition current of 18 A/dm2 is applied atcurrent ratios of ii = idissolution/ideposition = 0, 0.077, 0.200 and 0.368. A simple exponential equation isfitted ...

Journal: :تحقیقات آب و خاک ایران 0
آرش محمدبیگی دانشگاه تهران فرهاد میرزایی دانشگاه تهران نگین اشرف دانشگاه تهران

pulse irrigation is consisted of an irrigation phase and a resting or non-operative irrigation phase. water intermittent use causes that advance front with less volume water over continuous irrigation is completed, which it effect on the pattern of soil moisture. another important subject in trickle irrigation is water distribution in non- operative irrigation that called redistribution. amount...

In this paper, the self-focusing property of an intense circularly polarized laser pulse in hot magnetized plasma is investigated theoretically. First, an envelope equation governing the spot-size of the laser beam for both left- and right-hand polarizations has been derived in the presence of a planar wiggler. Furthermore, non-linear dispersion relation of laser pulse is obtained by using Maxw...

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