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Showing 6 results for Nasseri

Karim Nasseri , Shoaleh Shami , Laila Rashidzadeh , Laleh Amini Kanisiran ,
Volume 23, Issue 104 (9-2013)
Abstract

Background and purpose: Sore throat is one of the most common complications of general anesthesia. The source of pain perhaps is from the pharyngeal, laryngeal or tracheal and maybe is the cause of unpleasantness, discomfort and a bad memory after general anesthesia. This study evaluated the effectiveness of lubricating lidocaine gel on the sore throat cough and scratching of throat after laryngeal mask airway (LMA) insertion. Materials and methods: Sixty patients -who scheduled for elective eye surgery- underwent general anesthesia and with the inclusive criteria and were randomly divided into two groups of intervention and control in a double-blinded study. The posterior surface of LMAs was lubricated with lidocaine gel 2% in the intervention group and non-medical lubricant gel in the control group. After induction of anesthesia that was similar in two groups, the LMA was inserted using classical method by an anesthesiologist who was unaware of the used gel, and after ensuring adequate ventilation LMAs were fixed in site. Twenty-four hours after the operation the patient's sore throat, coughing and itchy throat were checked. Results: Results showed that the two groups had no statistically significant differences regarding age and gender (P > 0.05). Furthermore, there was no statistically significant difference between the two groups regarding the amount of blood staining on LMA cuff after removal. The severity of sore throat in 24 hours after the surgery, the incidence of cough and itchy throat were similar as well. Conclusion: The gel used to facilitate placement of LMA has no impact on the postoperative sore throat, cough, and blood staining on LMA, and throat itching.
Karim Nasseri, Siroos Shahsawari, Zohreh Ziaee,
Volume 23, Issue 104 (9-2013)
Abstract

Background and purpose: Myalgia is among the relatively common side effects of electroconvulsive therapy (ECT). Positive preventive analgesic effects of ketamine in surgical patients have been studied. However, the effects of ketamine on post-ECT myalgia are unclear. This study aimed to examine the effects of ketamine on myalgia in patients with depressive disorder who underwent ECT. Materials and methods: According to the diagnostic and statistical manual of mental disorders forth edition (DSM-IV) criteria, 50 major depressive patients were included in a double blinded, cross-sectional clinical study at the second and third ECT sessions. They were randomly allocated into induction of anesthesia either with propofol 1 mg/kg plus ketamine 0.3mg/kg or with propofol 1 mg/kg plus 2ml 0.9% saline in first study ECT session and vice versa in the next ECT session. Paralysis was achieved with 0.5 mg/kg succinylcholine in two sessions. Assessments included post ECT myalgia, seizure duration, and hemodynamic profile. Results: There were 50 patients, with a mean age of 37.8 years, who underwent 100 ECT sessions. The mean duration of seizures in the ketamine and saline group was 28 and 29 seconds, respectively, and the difference was not statistically significant. Ketamine did not significantly reduce the myalgia in compared to the placebo. Conclusion: Based on the results of our study, adding ketamine to propofol for induction of anesthesia in patients with major depression who undergo ECT has no effects on seizure duration and post ECT myalgia.
Roshanak Rezaeikalantary, Ahmad Jonidijafari, Babak Kakavandi, Simin Nasseri, Ahmad Ameri, Ali Azari,
Volume 24, Issue 113 (6-2014)
Abstract

Background and purpose: Removal of lead as a toxic metal from contaminated water resources is necessary due to the dangerous effect of lead. One of the most effective methods of removal is the adsorption process. The aim of this study was adsorption and magnetic separation of lead from synthetic wastewater using iron oxide nanoparticles and carbon (ION/C) composite Material and Methods: In this study nanoparticles of iron oxide (ION) were used as a source of iron for magnetic separation of powder activated carbon from solution samples. The physical and surface properties of the adsorbent were studied along with influencing factors (pH, contact time, adsorbent dosage, initial lead concentration, and temperature) on the adsorption process. Kinetic equations and equilibrium isotherms studies were also conducted. Results: The size of ION and specific surface area of ION/C were found to be 30-80 nm and 671.2 m2/g, respectively. We observed that the adsorption process reached equilibrium at 60 min and pH=6and adsorption efficiency increased by increasing the amount of adsorbent and temperature. Maximum adsorption capacity based on Langmuir isotherms was obtained 67.1mg/g at 50 °C. Conclusion: According to this study it is believed that magnetized active carbon by keeping its physical and surface properties could be a suitable method to solve some related problems including separation and filtration.
Mahdi Farzadkia, Simin Nasseri, Roshanak Rezaei Kalantary, Hosseinali Asgharnia, Mahmoud Reza Gohari, Ali Esrafili, Yousef Dadban Shahamat, Nematollah Ghanbari,
Volume 25, Issue 134 (3-2016)
Abstract

Background and purpose: Quality of surface waters is important for different uses and identification of contaminated sites and pollutants leads to appropriate use of water. So, the aim of this study was to evaluate the quality of water Babolrood.

Materials and methods: In this cross-sectional study, sampling was conducted in ten stations during summer 2013. Data was analyzed using National Sanitation Foundation Water Quality Index (NSFWQI) and SPSS, and then the river’s path was zoned by Geographic Information System (GIS).

Results: Based on NSFWQI, the best status was found in second station (79, good) and the worst was observed in station 10 (52, moderate).

Conclusion: Based on NSFWQI, the quality of river was good in upstream and moderate in downstream, indicating human as the main responsible for low quality of water.


Hossein Kamani, Simin Nasseri, Ramin Nabizadeh, Mehdi Khoobi, Seyed Davoud Ashrafi, Edris Bazrafshan, Amir Hossein Mahvi,
Volume 28, Issue 166 (11-2018)
Abstract

Background and purpose: Sonocatalytic process as an advanced oxidation process is considered for degradation of pollutants in aqueous solution. The aim of this study was to increase the removal of dye by doping of TiO2 with non-metal element such as nitrogen.
Materials and methods: Un-doped and N-doped TiO2 nano-particles with different nitrogen contents were synthesized by a simple sol–gel method in laboratory. X-ray diffraction (XRD), Field emission scanning electron microscopy (FE-SEM), Energy dispersive X-ray analysis (EDX), and UV–visible diffuse reflectance spectra (UV-vis DRS) were used for characterization of the synthesized nanoparticles. The sonocatalytic activity of synthesized nanoparticles was evaluated by investigating degradation of reactive blue 29 under ultrasonic radiation and the effects of nitrogen doping content, different initial pH of solution, and dye concentration.
Results: The study showed that both un-doped and doped nano-particles were in nano-sized that tend to agglomerate. By using different nano-particles, the highest sonocatalytic activity was achieved by 0.6 N-doped TiO2 with 58 % after 90 min of ultrasonic irradiation. Effect of initial pH of aqueous solution showed that the sonocatalytic activity decreased by increase in initial pH.
Conclusion: Sonocatalysis using N-doped TiO2 was found to be an effective method for degradation of textile dyes. The high sonocatalytic activity could be attributed to the band gap narrowing and anatase phase in TiO2 nanoparticles. Sonocatalytic degradation followed the Langmuir–Hinshelwood kinetic model (R2 = 0.98) with a rate constant of 0.01 mg L−1 min−1.
 
Anoushirvan Mohseni-Bandpey, Mohsen Nasseri, Mohammad Rafiei, Mohsen Eslamizadeh, Yalda Hashempour,
Volume 30, Issue 191 (12-2020)
Abstract

Background and purpose: Jajrood River is one of the major drinking water supply rivers in Tehran, so, the effects of climate change on its quantitative and qualitative resources are highly important. This study aimed at investigating the effect of climate change on organic carbon removal in Jajrood basin.
Materials and methods: In this descriptive cross-sectional study, CanESM2 general circulation model and SDSM (version 5.3) downscaling model were used for simulating climatic data and HYMOD model was used to simulate runoff in Jajrood catchment. Climate change scenarios RCP2.6, RCP4.5, and RCP8.5 were simulated for 2006-2050. Stepwise regression and linear regression were used in MATLAB R2017a to model the qualitative data.
Results: According to findings, the temperature of this basin will be about 2.25°C warmer than the base period. Rainfall and runoff in the whole catchment will increase by about 10% and 93% and the concentrations of total organic carbon of the inlet to the treatment plant will be about three times higher than the base period which will increase the load on carbon in different units of the treatment plant.
Conclusion: Increased rainfall caused by washing the upstream agricultural lands and temperature increase due to elevated rate of bioactivity lead to deterioration of the quality of water entering the dam and increase the organic carbon entering the treatment plant. On the other hand, Tehranpars water treatment plant with its current capacity and efficiency will not meet the standards of drinking water in terms of organic carbon.
 

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