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Search Results: 1 - 10 of 117 matches for " Meisam Naeimi Kararoudi "
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Evaluation of Serumal Levels of AST, ALT, Total Bilirubin, Glucose, Urea and Creatinin in Mice after Administration of Tc-99m MIBI
Bahram Amouoghli Tabrizi,Meisam Naeimi Kararoudi,Babak Mahmoudian
International Journal of Animal and Veterinary Advances , 2012,
Abstract: Tc-99m MIBI methoxyisobutylisonitrile (MIBI) is a lipophilic cationic agent which is widely used for myocardial perfusion imaging and also for the detection of various tumors. In present study, for evaluation of serum level of AST, ALT, Total bilirubin, FBC, Urea and Creatinin, 25 mice, respectively were selected and they were divided in 5 groups. 0.3 mC/kg of drug was injected to 4 groups via tail vein. In the control group, before beginning of the investigation bleeding was done. Twenty four hours after injection from the 2nd group, 48 h later from the 3rd group, one week later from the 4th group and two weeks later from the 5th group bleeding was done respectively and the levels of Glucose, Urea, creatinin, ALT, AST and T-bilirubin, respectively were measured using spectophotometr (Biowave S2100 made in England) and diagnostic kits (made in bio-chemistry company, Iran). In Comparison to control group, results had significant differences in serum level of Urea, Creatinin and total bilirubin after 24 and 48 h of administration(p<0.05). Also there were insignificant differences in serum ALT and AST level and Glucose after 24 h of administration in all groups (p<0.05). Results shows that more care is needed for administration of drug in diabetic, renal and hepatic patients.
The Prevalence and Symptoms of Premenstrual Syndrome under Examination  [PDF]
Nasim Naeimi
Journal of Biosciences and Medicines (JBM) , 2015, DOI: 10.4236/jbm.2015.31001
Abstract: Introduction: Premenstrual Syndrome (PMS) is a common disorder in childbearing age. Based on different definitions, it is accompanied with specific annoying symptoms that clearly emerge after ovulation and decrease or end with the onset of menstruation. Methods: The present study aimed to determine the prevalence of premenstrual syndrome in university students of Sistan and Baluchestan University (Iran) in the academic year 2013-2014. Two hundred and one female university students living in dormitories were randomly selected. The subjects completed two questionnaires of Demographic Information and Symptom Assessment based on the criteria of ACOG and DSM-IV. Results: According to the mentioned criteria, “36.3%” of subjects suffered from Premenstrual Dysphoric Disorder (PMDD) and “85.6%” of subjects indicated the symptoms of PMS. The severity of PMS in 14(%7) subjects was high. Of 86 and 72 subjects “42.8%” and “35.8%” was moderate respectively, it was mild. Among university students, the most common mood symptom (emotional) and somatic symptom (physical) were fatigue and lethargy and abdominal pain (“72.6%” and “62.7%”, respectively). PMS was significantly related to dysmenorrhea and severity of menstrual pain (p < 0.05). Conclusion: Given the high prevalence of this syndrome and its effect on various aspects of life, we highly recommend informing young individuals through books, workshops and media in order to identify the symptoms, provide information about methods of control and treatment of this syndrome, and apply non-interventional treatments and methods to reduce the symptoms.
Elastic free-energy of wormlike micellar chains: theory and suggested experiments
Meisam Asgari
Physics , 2015,
Abstract: The extensive application of surfactants motivates comprehensive and predictive theoretical studies that improve our understanding of the behaviour of these complex systems. In this study, an expression for the elastic free-energy density of a wormlike micellar chain is derived taking into account interactions between its constituent molecules. The resulting expression incorporates the sum of a quadratic term in the curvature and a quadratic term in the torsion of the centerline of wormlike micelle and thus resembles free-energy density functions for polymer chains and DNA available in the literature. The derived model is applied on a wormlike micelle in the shape of a circular arc, open or closed. A detailed application of the derived model on wormlike micelles of toroidal shape, along with employing necessary statistical-thermodynamical concepts of self-assembly, is performed, and the results are found to be consistent with the ones available in the literature. Steps towards obtaining the material parameters through experiments are suggested and discussed.
Comparison of Sinonasal Symptoms in Patients with Nasal Septal Deviation and Patients with Chronic Rhinosinusitis
Mohammad Naeimi,Maria Garkaz,Mohammad Reza Naeimi
Iranian Journal of Otorhinolaryngology , 2013,
Abstract: Introduction: Disorders of the nose and paranasal sinuses are among the most common chronic illnesses. Although considerable progress has been made in the medical and surgical control of these diseases, a large number of questions relating to the diagnosis, evaluation, and treatment of these conditions remain unanswered. The aim of the present study was to evaluate differences in the frequency of symptoms and disease severity in patients with nasal septal deviation (NSD) compared with chronic rhinosinusitis (CRS). Materials and Methods: A total of 156 patients, divided into NSD and CRS groups, were studied in relation to symptoms and disease severity. Patients were selected from those referred to the Ear, Nose, and Throat (ENT) Wards of the Imam Reza and Ghaem Hospitals, who had not responded to a variety of treatments. Depending on the type of disease, patients were candidates for either septoplasty or endoscopic sinus surgery. The Rhinosinusitis Symptom Inventory was administered to measure the severity of symptoms, with scores assigned based on the answers given by patients (Likert scale). Scores were compared between the CRS and NSD groups. Results: A total of 156 patients (78 with NDS and 78 with CRS) entered the study in overall sinonasal symptoms were more prevalent in CRS group. Nasal congestion, runny nose, earache, toothache, and smelling disorder were significantly more common in the CRS group (P0.05). Conclusion: Patients with CRS manifested statistically significantly greater sinonasal symptom scores than patients with NSD.
The Effects of Annealing Process on Dielectric and Piezoelectric Properties of BMT-Base Lead-Free Ceramics  [PDF]
Mahdi Ghasemifard, Meisam Daneshvar, Misagh Ghamari
World Journal of Nano Science and Engineering (WJNSE) , 2013, DOI: 10.4236/wjnse.2013.33014
By using nitric acid as the fuel, the lead-free ceramic of Ba(Ti1-x,Mgx)O3 (x = 0.31) was prepared by auto combustion method (ACM). To make a comparison, this ceramic was also prepared using mixed oxide method (MOM). By X-ray diffraction, the phase structures of two samples were studied, and the results showed that rising temperatures would reduce unwanted phases. The piezoelectric and electrical properties as a function of calcination and sintering temperatures were investigated. The results showed that the outstanding electrical properties were obtained for nanoceramic with this composition. The SEM image of the grain size was estimated around 2 micrometers, and the grain size increased with the increasing of sintering temperature for two samples. The curie temperature of the BMT-ACM was 126°C and it’s significantly larger than the curie temperature of BMT-MOM which was 118°C. The results of electrical properties emphasized that the synthesis optimum temperature for two samples was about 1200°C and it was the best temperature that led to improved properties such as dielectric constant, polarization and piezoelectric coefficients.
Virtual Reality Driving Simulation for Measuring Driver Behavior and Characteristics  [PDF]
Seyyed Meisam Taheri, Kojiro Matsushita, Minoru Sasaki
Journal of Transportation Technologies (JTTs) , 2017, DOI: 10.4236/jtts.2017.72009
Abstract: This article provides new insights regarding driver behavior, techniques and adaptability. This study has been done because: 1) driving a vehicle is critical and one of the most common daily tasks; 2) simulators are used for the purpose of training and researching driver behavior and characteristics; 3) the article addresses driver experience by involving new virtual reality technologies. A simulator has been used to assist novice drivers to learn how to drive in a very safe environment, and researching and collecting data for researchers has become easier due to this secure and user-friendly environment. The theoretical framework of this driving simulation has been designed by using the Unity3D game engine (5.4.f3 version) and was programmed with the C# programming language. To make the driving environment more realistic we, in addition, utilized the HTC Vive Virtual reality headset which is powered by Steamvr. We used Unity Game Engine to design our scenarios and maps because by doing this we are able to be more flexible with designing. In this study, we asked 10 people ranging from ages 19 - 37 to participate in this experiment. Four Japanese divers and six non-Japanese drivers engaged in this study, some of which do not have a driver’s license in Japan. A few Japanese drivers have a license and car, while others have a license but no car. In order to analyze the results of this experiment we are used MatlabR2016b to analyze the gathered data. The result of this research indicates that individual’s behavior and characteristics such as controlling the speed, remaining calm and relaxed when driving, driving at appropriate speeds depending on changes in road structures and etc. can affect their driving performance.
Development of a Driving Simulator with Analyzing Driver’s Characteristics Based on a Virtual Reality Head Mounted Display  [PDF]
Seyyed Meisam Taheri, Kojiro Matsushita, Minoru Sasaki
Journal of Transportation Technologies (JTTs) , 2017, DOI: 10.4236/jtts.2017.73023
Abstract: Driving a vehicle is one of the most common daily yet hazardous tasks. One of the great interests in recent research is to characterize a driver’s behaviors through the use of a driving simulation. Virtual reality technology is now a promising alternative to the conventional driving simulations since it provides a more simple, secure and user-friendly environment for data collection. The driving simulator was used to assist novice drivers in learning how to drive in a very calm environment since the driving is not taking place on an actual road. This paper provides new insights regarding a driver’s behavior, techniques and adaptability within a driving simulation using virtual reality technology. The theoretical framework of this driving simulation has been designed using the Unity3D game engine (5.4.0f3 version) and programmed by the C# programming language. To make the driving simulation environment more realistic, the HTC Vive Virtual reality headset, powered by Steamvr, was used. 10 volunteers ranging from ages 19 - 37 participated in the virtual reality driving experiment. Matlab R2016b was used to analyze the data obtained from experiment. This research results are crucial for training drivers and obtaining insight on a driver’s behavior and characteristics. We have gathered diverse results for 10 drivers with different characteristics to be discussed in this study. Driving simulations are not easy to use for some users due to motion sickness, difficulties in adopting to a virtual environment. Furthermore, results of this study clearly show the performance of drivers is closely associated with individual’s behavior and adaptability to the driving simulator. Based on our findings, it can be said that with a VR-HMD (Virtual Reality-Head Mounted Display) Driving Simulator enables us to evaluate a driver’s “performance error”, “recognition errors” and “decision error”. All of which will allow researchers and further studies to potentially establish a method to increase driver safety or alleviate “driving errors”.
Highly Efficient and Facile Method for Synthesis of 2-Substituted Benzimidazoles via Reductive Cyclization of O-Nitroaniline and Aryl Aldehydes
Hossein Naeimi,Nasrin Alishahi
Organic Chemistry International , 2012, DOI: 10.1155/2012/498521
Abstract: A versatile and convenient synthesis of 2-substituted benzimidazoles, using o-nitroaniline as starting material with several aryl aldehydes, has been accomplished by using a small amount of a reluctant agent. The reaction was carried out under very mild conditions at room temperature. The yields obtained are very good in reasonably short reaction times. 1. Introduction Benzimidazoles are very useful intermediates/subunits for the development of molecules of pharmaceutical or biological interest. Substituted benzimidazole derivatives have found applications in diverse therapeutic areas including antihypertensives, antivirals, antifungals, anticancers, and antihistaminics [1]. There are two general methods for the synthesis of 2-substituted benzimidazole. One is coupling of o-phenylenediamines and carboxylic acids [2] or their derivatives (nitriles, imidates, or orthoesters) [3], which often require strong acidic conditions, and sometimes combine with very high temperature or the use of microwave irradiation [4]. The other way involves a two-step procedure that is oxidative cyclodehydrogenation of aniline schiff’s bases, which are often generated in situ from the condensation of o-phenylenediamines and aldehydes. Various oxidative reagents such as tetracyano ethylene [5], nitrobenzene [6], 1,4-benzoquinone [7], DDQ [8], benzofuroxan [9], NaHSO3 [10], MnO2 [11], oxone [12], DMP [13], Pb(OAc)4 [14], and NH4VO3 [15] have been employed. However, all of these methods have problems, including drastic reaction conditions, expensive catalyst, low yields, and severe side-reactions. Therefore, the development of a cost-effective, safe, and inexpensive reagent system is desirable. In this research, we report a one-pot, high-yield, facile, and inexpensive synthesis of 2-substituted benzimidazoles directly from o-nitroanilines and aryl aldehydes via reductive condensation of o-nitroanilines at room temperature under mild conditions. 2. Experimental Section 2.1. Materials All the materials were of commercial reagent grade. The aromatic aldehydes and o-nitroaniline were purified by standard procedures and purity determined by thin layer chromatography (TLC). 2.2. Apparatus IR spectra were recorded as KBr pellets on a Perkin-Elmer 781 spectrophotometer and an Impact 400 Nicolet FT-IR spectrophotometer. 1H NMR and 13C NMR were recorded in DMSO solvent on a Bruker DRX-400 spectrometer with tetramethylsilane as internal reference. Melting points obtained with a Yanagimoto micromelting point apparatus are uncorrected. The purity determination of the substrates and reaction
Repair of Head and Face Defects with the Use of Pericranial Flap
Mohammad Naeimi,Saeed Hosseini
Iranian Journal of Otorhinolaryngology , 2011,
Abstract: Introduction: The pericranial flaps' benefits have been described in many otolaryngologic, maxillofacial and plastic surgery literature. The benefits ar e due to the pericranial flaps unique characteristics including good flexibility and mobility, very rich blood supply from several arterial sources and access to sufficient bulk of the flap without any need for distant surgical sites. Using pericranial flaps to repair the local defects of the head and face region in several cases has been reported in this study. Materials and Methods: A follow up study was carried out on 12 patients who had undergone frontal sinus obliteration; auriculoplasty and repair of the orbital walls and scalp’s defects. Pericranial flap had been used for all these patients. Demographic specifications, surgical indications, imaging evaluations and early and late complications were recorded as well. The functional and cosmetic results and also the satisfaction level of patients were also assessed. Results: According to the average follow up period which lasted about 4 years, none of the patients suffered early or late significant complications. No disease relapse or need for revision surgery was reported. Almost all patients were completely satisfied with the procedure and its cosmetic results. Conclusion: The use of a pericranial flap is a simple, quick, cost-effective and safe method for repair of head and face defects. Although, a longer follow up time is required, but this uncomplicated method has been considered as an ideal method to repair sinonasal, ear and scalp defects.
Efficient Synthesis and Characterization of Some Novel Nitro-Schiff Bases and Their Complexes of Nickel(II) and Copper(II)
Hossein Naeimi,Mohsen Moradian
Journal of Chemistry , 2013, DOI: 10.1155/2013/701826
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