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Search Results: 1 - 10 of 15040 matches for " Mohammad Hossein Ghafari "
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Comparing Propofol-ephedrine with Propofol-saline on Intubating Conditions after Priming by Atracurium
Sussan Soltani Mohammadi,Mohammad Hossein Ghafari
Journal of Medical Sciences , 2007,
Abstract: In this study we conducted a double blind, prospective, controlled trial comparing intubating conditions after induction with propofol-ephedrine or propofol-saline, after priming by atracurium. Seventy adult patients received 2 μg kg-1 fentanyl and priming dose of atracurium (0.05 mg kg-1) with preoxygeneation. After 2.5 min they were randomly assigned to receive either propofol 2.5 mg kg-1 and 140 μg kg-1 ephedrine or propofol 2.5 mg kg-1 and saline followed by atracurium 0.5 mg kg-1. Tracheal intubation was performed 30 seconds later. Jaw relaxation, vocal cord position and diaphragmatic response were used to assess intubating condition. There was no statistically significant difference in intubating condition between the two groups. Jaw relaxation and response to intubation was better in ephedrine group than saline group (p = 0.014 and p = 0.049, respectively). Vocal cord positions did not differ significantly between the two groups. There were not statistically significant differences in mean arterial pressure between and within two groups. There was statistically significant difference in heart rate between two groups (p = 0.01), but within subject test did not show significant difference in each group. The only complications were 2 cases of self-limiting sinus tachycardia of less than 130 beats min-1 in the ephedrine group. In conclusion ephedrine in dose of 140 μg kg-1 combining with propofol for intubation after priming by atracurium did not improve intubating condition and induced no clinically acceptable hemodynamic responses.
Alteration of Dentate Gyrus Astrocytes in Diabetic Rats: Protective Role of Urtica dioica
Golalipour,Mohammad Jafar; Ghafari,Soraya; Latifimoghadam,Mohammad Hossein; Kaboli,Sakineh;
International Journal of Morphology , 2011, DOI: 10.4067/S0717-95022011000400039
Abstract: diabetes mellitus can cause astrocytes alterations in the central nervous system. urtica dioica (nettle) is among several species listed for their use against diabetes in folk medicine. therefore, this study was done to evaluate the protective effect of urtica dioica on astrocytes density of the dentate gyrus in stz induced diabetic rats. in this experimental study, 21 male albino wistar rats were randomly allocated equally into normal, diabetic and protective (nettle treated diabetic) groups. hyperglycemia was induced by streptozotocin (80 mg/kg) in the animals of diabetic and treatment groups. before induction of diabetes in animals, animals in protective group received hydroalcoholic extract of urtica dioica (100 mg/kg/bw /day) for five days intraperitoneally. four weeks after induction of diabetes, animals were sacrificed and coronal sections were taken from the dorsal hippocampal formation of the right cerebral hemispheres and stained with ptah stain. the area densities of the astrocytes were measured and compared in the three groups (p < 0.05). the number of astrocytes in dg area of controls was 17.72±6.7. the density of astrocytes increased in diabetic (24.26±9.5) in comparison with controls. the density in the nettle treated rats (23.17±5.8) was lower than diabetic rats. this study showed that the administration of u. dioica extract before induction of diabetes can not significantly help compensate for astrocytes in the dentate gyrus of treated rats.
Alteration of Dentate Gyrus Astrocytes in Diabetic Rats: Protective Role of Urtica dioica Alteración de los Astrocitos del Giro Dentado en Ratas Diabéticas: Rol Protector de Urtica dioica
Mohammad Jafar Golalipour,Soraya Ghafari,Mohammad Hossein Latifimoghadam,Sakineh Kaboli
International Journal of Morphology , 2011,
Abstract: Diabetes mellitus can cause astrocytes alterations in the central nervous system. Urtica dioica (Nettle) is among several species listed for their use against diabetes in folk medicine. Therefore, this study was done to evaluate the protective effect of Urtica dioica on astrocytes density of the dentate gyrus in STZ induced diabetic rats. In this experimental study, 21 male albino Wistar rats were randomly allocated equally into normal, diabetic and protective (nettle treated diabetic) groups. Hyperglycemia was induced by streptozotocin (80 mg/kg) in the animals of diabetic and treatment groups. Before induction of diabetes in animals, animals in protective group received hydroalcoholic extract of Urtica dioica (100 mg/kg/BW /day) for five days intraperitoneally. Four weeks after induction of diabetes, animals were sacrificed and coronal sections were taken from the dorsal hippocampal formation of the right cerebral hemispheres and stained with PTAH stain. The area densities of the astrocytes were measured and compared in the three groups (p < 0.05). The number of astrocytes in DG area of controls was 17.72±6.7. The density of astrocytes increased in diabetic (24.26±9.5) in comparison with controls. The density in the nettle treated rats (23.17±5.8) was lower than diabetic rats. This study showed that the administration of U. dioica extract before induction of diabetes can not significantly help compensate for astrocytes in the dentate gyrus of treated rats. La diabetes mellitus puede provocar alteraciones de los astrocitos en el sistema nervioso central. La Urtica dioica (ortiga) es una de varias especies incluidas para su uso contra la diabetes en la medicina popular. Este estudio se realizó para evaluar el efecto protector de la Urtica dioica sobre la densidad de los astrocitos en el giro dentado en ratas con diabetes inducida por STZ. En este estudio experimental 21 ratas albinas Wistar fueron asignadas al azar equitativamente en grupos normal, diabético y protegido (diabéticos tratados con ortiga). La hiperglicemia fue inducida por estreptozotocina (80 mg/kg) en los grupos de animales diabéticos y en tratamiento protector. Previo a la inducción diabética, los animales del grupo protegido recibieron, por vía intraperitoneal, extracto hidroalcohólico de Urtica dioica (100 mg/kg/peso corporal/día) durante cinco días . Cuatro semanas después de la inducción de la diabetes, los animales fueron sacrificados y se tomaron secciones coronales de la formación del hipocampo dorsal de los hemisferios cerebrales derechos y se ti eron con tinción PTAH. La densid
Preoperative Gabapentin or Clonidine Decreases Postoperative Pain and Morphine Consumption after Abdominal Hysterectomy
Mohammad Hossein Ghafari,Majid Akrami,Behrang Nouralishahi,Ali Sadegh
Research Journal of Biological Sciences , 2012,
Abstract: Gabapentin and clonidine have been used to decrease pain after variety of surgical procedures. We investigated, in a randomized, placebo-controlled, double-blind study, the efficacy and safety of gabapentin or clonidine on pain after abdominal hysterectomy and on morphine consumption in patients. The 99 patients, ASA physical status I-II were randomized to receive either oral placebo or gabapentin 300 mg or clonidine 100 μg at night (10: 00 pm) before surgery and 1 h pre-operatively. Anesthesia was induced by midazolam 0.03 mg kg-1, fentanyl 2.5 μg kg-1, sodium thiopental 5 mg kg-1 and atracurium 0.5 mg kg-1 and continued by 1 MAC isoflurane, 4 L min-1 fresh gas flow (50% N2O in O2). Heart rate, SPO2, mean arterial pressure, respiratory rate, opioid consumption and patient’s pain intensity (according to VAS) were recorded at the time of recovery and 1, 4, 8, 12, 24 and 48 h post operatively. All enrolled patients received postoperative intravenous analgesia delivered through a PCA pump. Total morphine consumption and patient’s pain intensity (according to VAS) were lower in gabapentin and clonidine group in comparison to control group (p<0.05). Meanwhile, gabapentin administration significantly decreased morphine consumption after hysterectomy in comparison to clonidine. There were no significant differences between groups in case of complications. Preoperative oral gabapentin (low dose) or clonidine lowers pain score and total morphine consumption for analgesia after abdominal hysterectomy.
A Comparison of Incidence of the Postdural Puncture Headache and Low Back Pain in the Cesarean Section Patients Undergoing Spinal Anesthesia and General Anesthesia: A Randomized Clinical Trial Study
Mohammad Hossein Ghafari,Ali Movafegh,Nasim Sadri Zadeh
Research Journal of Biological Sciences , 2012,
Abstract: Post Dural Puncture Headache (PDPHA) and Low Back Pain (LBP) are possible complications in patients undergoing cesarean section by spinal anesthesia, but yet, headache and LBP may occur in patientsundergoing general anesthesia. In this study, 250 patients were randomized into 2 groups to receive either general anesthesia (Group G, n = 125) or spinal anesthesia using 25 G needle (Group S, n = 125). Patients were asked about the incidence of headache or back pain during 24, 48 h and 30 days (by telephone) post of surgery. The incidence of pain was evaluated by a yes or no survey. Bilateral frontal or occipital pain increased on upright position was considered as a PDPHA. Patients characteristics, perioperative fluid administration, 48 h post operative morphine consumption and the duration of surgery was similar in both groups. There were no significant differences, in the incidence of PDPHA or LBP after 24 h, 48 h and 30 days in groups. Spinal anesthesia using 25 G spinal needle and suitable technique was not associated with increasing risk of PDPHA or persistent LBP after cesarean section in comparison with general anesthesia.
Comparison in Effect of Intravenous Alfentanil and Lidocaine on Airway-Circulatory Reflexes during Extubation
Mustafa Sadegi,Abolfazl Firozian,Mohammad Hossein Ghafari,Fatemeh Esfehani
International Journal of Pharmacology , 2008,
Abstract: This randomized controlled double-blind trial was designed to compare the presence of Airway-Circulatory Reflexes to tracheal extubation in groups administering IV alfentanil or lidocaine, in 150 patients undergoing cesarean surgery receiving a standardized anesthetic protocol. At the end of surgery, after return of spontaneous ventilation, patients received either alfentanil 15 μg kg-1 or lidocaine 1.5 mg kg-1. The presence of cough and it`s severity during emergence before extubation was noted. BP and HR were recorded at 2 min after end of surgery (baseline), 2 min after study drug administration and 1 min after extubation. The groups were matched according to age, baseline BP and HR. The incidence of coughing was less frequent in the alfentanil than in the lidocaine group (19% versus 75%, respectively, p<0.001). Although the severity of coughing was considerably different between two groups (lower in alfentanil g) but was not statistically different (p = 0.292). The mean BP and HR were lower in alfentanil than lidocaine group 2 min after administration and 1 min after extubation (p<0.001). The median of delay time (time between the study drug administration and extubation) was 6 min in alfentanil (Range: 4-8) and 5 min in lidocaine groups (Range: 4-8) (p<0.001). These results indicate that alfentanil decreases Airway-Circulatory Reflexes more than lidocaine during emergence from anesthesia without clinically important prolonging the time to extubation.
Thickness Estimation of the Si Thin Films: a Simulation Study
Mohammad Babazadeh,Abdollah Rahmat Nezamabad,Hossein Movla,Farzad Ghafari Jouneghani
Physics , 2014,
Abstract: We propose a theoretical study for Si thin film thickness measurement that is based on incident low energy electron beam on the film and counting the transmitted/incident electron fraction. It estimates the thin film thickness distribution from a exponential relation which obtained from counting the fraction of transmitted/incident electron at different thicknesses. By using this obtained equation, it is possible to estimate unknown thickness of the Si thin film. In order to calculate the Si thin film thickness estimation, the energy of the incident electron beams is varied from 6-12 keV, while the thickness of the Si film is varied between 100-400 nm. The most significant feature of this method is that no expensive instruments are required. As anticipated, the proposed method shows that there is a relationship between film thickness and incident beam energy, which by using this relationship, we can find unknown film thickness in 1-D and 2-D conditions. Other advantages include wide measurement range, no calibration need and simple method. Additionally, an investigation by different beam energies helps to avoid artefact from this method. All calculations were done by CASINO numerical simulation package.
Quantum Belief Propagation Algorithm versus Suzuki-Trotter approach in the one-dimensional Heisenberg chains
Farzad Ghafari Jouneghani,Mohammad Babazadeh,Davoud Salami,Hossein Movla
Mathematics , 2014,
Abstract: Quantum systems are the future candidates for computers and information processing devices. Information about quantum states and processes may be incomplete and scattered in these systems. We use a quantum version of Belief Propagation(BP) Algorithm to integrate the distributed information. In this algorithm the distributed information, which is in the form of density matrix, can be approximated to local structures. The validity of this algorithm is measured in comparison with Suzuki-Trotter(ST) method, using simulated information. ST in 3-body Heisenberg example gives a more accurate answer, however Quantum Belief Propagation (QBP) runs faster based on complexity. In order to develop it in the future, we should be looking for ways to increase the accuracy of QBP.
Investigation of commuting Hamiltonian in quantum Markov network
Farzad Ghafari Jouneghani,Mohammad Babazadeh,Rogayeh Bayramzadeh,Hossein Movla
Computer Science , 2013, DOI: 10.1007/s10773-014-2042-8
Abstract: Graphical Models have various applications in science and engineering which include physics, bioinformatics, telecommunication and etc. Usage of graphical models needs complex computations in order to evaluation of marginal functions,so there are some powerful methods including mean field approximation, belief propagation algorithm and etc. Quantum graphical models have been recently developed in context of quantum information and computation, and quantum statistical physics, which is possible by generalization of classical probability theory to quantum theory. The main goal of this paper is preparing a primary generalization of Markov network, as a type of graphical models, to quantum case and applying in quantum statistical physics.We have investigated the Markov network and the role of commuting Hamiltonian terms in conditional independence with simple examples of quantum statistical physics.
Accrual-based accounting system versus cash-based accounting: An empirical study in municipality organization
Hossein Mohammad Pour Zarandi,Esmaeel Ghafari,Mahbobeh Arab,Seyed Mohsen Tabatabaei Mozdabadi
Management Science Letters , 2013,
Abstract: There are many cases, where we may wish to choose a good accounting system and would like to learn how they work and the advantages and disadvantages of each so we can choose the better one for a business. In this paper, we present an empirical survey to understand whether we can choose accrual or cash accounting system. The proposed study designs a questionnaire among 220 experts in area of accounting affairs. The survey considers four sub hypotheses and one main hypothesis to see whether there are reliable rules and regulations in accrual-based accounting compared with cash accounting or not. Similarly, the survey investigates whether accrual-based accounting is more informative, comprehensive and provides better comparative results compared with cash accounting. The results indicate that accrual-based account performs better in terms of all mentioned criteria and it is a better method for managing accounting affairs compared with cash accounting systems.
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