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Search Results: 1 - 10 of 18645 matches for " Ali Shabani "
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Evaluating the Efficacy of Remifentanil-Propofol versus Isoflurane in Reducing Blood Loss with Considering Depth of Anesthesia during Endoscopic Sinus Surgery  [PDF]
Mohammad Ali Haghbin, Hossein Hakimzadeh, Mohammad Shabani
Neuroscience & Medicine (NM) , 2013, DOI: 10.4236/nm.2013.42009
Abstract:

Several methods have been suggested to decrease bleeding during surgery, one of which is the usage of hypotensive anesthetic agents. Endoscopic Sinus Surgery (ESS) is one of the surgeries which need a clear field and the amount of bleeding profoundly impacts the ability of surgeons. Current study was designed to evaluate the effect of remifentanil combined with propofol versus Isoflurane on blood loss during ESS and its possible interaction with Depth of Anesthesia. Fifty one patients comprising 15 females and 36 males undergoing ESS were chosen for this study. One group received propofol and remifentanil to induce and maintain anesthesia and the second group received Isoflurane. Mean Arterial Blood Pressure (MAP), Depth of Anesthesia and total blood loss were recorded for the patients of both group. Data were analyzed using t-test, Repeated Measures ANOVA and Pearson’s correlation. P < 0.05 was considered statistically significant. Both agents induced hypotension during surgery. No significant difference was observed in total blood loss between two groups. DA was decreased in both groups, but no significant correlation was found between DA and MAP or DA and blood loss. There is no significant difference between remifentanil combined with propofol and Isoflurane in decreasing blood loss during ESS, thus we suggest usage of hypotensive anesthetic agent regardless of its type is ESS.

Squamous Cell Carcinoma on Uncommon Locations in a Family With Epidermolysis Bullosa
Ali Akhavan,Masoud Shabani
Dermatology and Cosmetic , 2011,
Abstract: Epidermolysis bullosa (EB) is a group of dermatological conditions characterized by development of bullae and ulcers following trivial trauma. One of the most important complications of EB is squamous cell carcinoma. While occurance of skin squamous cell carcinoma is common in epidermolysis bullosa, its occurence on mucosal surface is rare. Herein, we report two members of a family who developed squamous cell carcinoma on their esophagus and tongue.
New Solution of Substrate Concentration in the Biosensor Response by Discrete Homotopy Analysis Method  [PDF]
Seyyed Ali Madani Tonekaboni, Ali Shahbazi Mastan Abad, Shahab Karimi, Mitra Shabani
World Journal of Engineering and Technology (WJET) , 2013, DOI: 10.4236/wjet.2013.13005
Abstract:

In this article, Discrete Homotopy Analysis Method (DHAM), as a new numerical method, is employed to investigate amperometric biosensor at mixed enzyme kinetics and diffusion limitation. Mathematical modeling of the problem is developed utilizing non-Michaelis-Menten kinetics of the enzymatic reaction. Different results are obtained for different values of the dimensionless parameters described in the paper. The presented solution is then compared with the available actual and simulated results.

Synthesis, characterization and anti-tumour activity of iron(III) Schiff base complexes with unsymmetric tetradentate ligands
Fahmideh Shabani, Lotf Ali Saghatforoush, Shahriar Ghammamy
Bulletin of the Chemical Society of Ethiopia , 2010,
Abstract: The synthesis and characterization of two new iron(III) complexes, [Fe(pythsalI)]Cl2 and [Fe(pythsalBr)]Cl2 with the NSNO-donor tetradentate Schiff base ligands pythsalHX [(5–X-N-(2pyridylethylsulfanylethyl) salicylideneimine] (X = I, Br)) obtained from the inserted condensation of 1-(2-pyridyl)-3-thia-5-aminopentane with the respective derivative salicylaldehyde in a 1:1 molar ratio is reported. The iron(III) complexes were characterized by several techniques using elemental analysis (C, H, N), FT-IR, electronic spectra and molar conductance measurements. The elemental analysis data suggest the stoichiometry to be 1:2 [M:L] ratio formation. The molar conductance measurements reveal the presence of 1:2 electrolytic nature complexes. Infrared spectral data agreed with the coordination to the central metal ion through deprotonated phenolic oxygen, imine and pyridine type nitrogens and the thioether sulfur atoms. From ligand field spectral data an octahedral geometry is assigned to the iron(III) ion in all these complexes. These new compounds have showed anti-tumour activity against two kinds of cancer cells that are K562 (human chronic myeloid leukemia) and Jurkat (human T lymphocyte carcinoma). KEY WORDS: Iron(III) complexes, Tetradentate ligands, Unsymmetric Schiff base, NSNO-donor, Anti-tumour, K562, Jurkat Bull. Chem. Soc. Ethiop. 2010, 24(2), 193-199.
Synthesis, characterization and thermodynamic studies of complexes of dimethyl, diethyl, and diphenyltin(IV) dichlorides with (2H)-1,4-benzothiazine-2,3-(4H)-dione dioxime
Abedien Zabardasti, Ali Kakanejadifard, Leyla Shabani
Bulletin of the Chemical Society of Ethiopia , 2012,
Abstract: The diorganotin(IV) compounds, [Me2SnCl2(H2L)], [Et2SnCl2(H2L)] and [Ph2SnCl2(H2L)] (H2L = (2H)-1,4-benzothiazine-2,3-(4H)-dione dioxime), were synthesized by treating the appropriate diorganotin(IV) dichloride with H2L in anhydrous ethanol. These complexes were characterized by IR, MS, UV-Vis, and 1H NMR. Thermodynamic studies of the reported complexes have been carried out and their stability were found in the order: [Me2SnCl2(H2L)] > [Et2SnCl2(H2L)] > [Ph2SnCl2(H2L)]. Theoretical calculations at the HF/3-21G* level showed that structures with alkyl groups at axial positions are more stable than their counterparts having alkyl groups at equatorial. KEY WORDS: Diorganotin(IV) dichloride, vic-Dioxime, (2H)-1,4-Benzothiazine-2,3-(4H)-dionedioxime, Thermodynamic studies Bull. Chem. Soc. Ethiop. 2012, 26(1), 85-94. DOI: http://dx.doi.org/10.4314/bcse.v26i1.9
The effect of ascorbic acid on hatching performance and tolerance against environmental stressor (high temperature) by immersion of Prussian carp (Carassius gibelio) fertilized eggs
M. Mehdi Taati,Bahareh Mehrad,Ali Shabani
Aquaculture, Aquarium, Conservation & Legislation , 2010,
Abstract: The aim of this study was to evaluate the influence of L-ascorbic acid (AA) in three levels (0,100, 1000 and 2000 mg L-1) on eyed egg and hatching rate, growth and viability of larva, and larvaltolerance against high temperature stress of Prussian carp Carassius gibelio (Bloch, 1782). The fertilizedeggs were placed in water containing different levels of AA for 3 h. The percentage of eyed egg andhatching were measured after 2 and 3 days respectively. After larva absorbed their yolk sac, half ofthem were challenged by high temperature (30°C) and the others were reared for 45 days and growthfactors and survival were calculated. The result shown that the highest eyed egg and hatching rate werein 2000 mg L-1 and had significantly differece with other treatments (P<0.05). The significant differencesin larval tolerance against high temperature stress were observed in 1000 and 2000 mg L-1 compared to0 and 100 mg L-1 treatments. No significant differences were observed between growth parameters oftreatment batches (P>0.05). Viability was different between experimental groups, but it was notsignificant between 0 and 100 mg L-1. According to our results when broodstocks of Prussian carp do nothave enough vitamin C in their ovaries, immersion of fertilized eggs in 2000 mg L-1 of AA may bebeneficial.
Synthesis, characterization and anti-tumour activity of iron(III) Schiff base complexes with unsymmetric tetradentate ligands
Fahmideh Shabani,Lotf Ali Saghatforoush,Shahriar Ghammamy
Bulletin of the Chemical Society of Ethiopia , 2010,
Abstract: The synthesis and characterization of two new iron(III) complexes, [Fe(pythsalI)]Cl2 and [Fe(pythsalBr)]Cl2 with the NSNO-donor tetradentate Schiff base ligands pythsalHX [(5–X-N-(2pyridylethylsulfanylethyl) salicylideneimine] (X = I, Br)) obtained from the inserted condensation of 1-(2-pyridyl)-3-thia-5-aminopentane with the respective derivative salicylaldehyde in a 1:1 molar ratio is reported. The iron(III) complexes were characterized by several techniques using elemental analysis (C, H, N), FT-IR, electronic spectra and molar conductance measurements. The elemental analysis data suggest the stoichiometry to be 1:2 [M:L] ratio formation. The molar conductance measurements reveal the presence of 1:2 electrolytic nature complexes. Infrared spectral data agreed with the coordination to the central metal ion through deprotonated phenolic oxygen, imine and pyridine type nitrogens and the thioether sulfur atoms. From ligand field spectral data an octahedral geometry is assigned to the iron(III) ion in all these complexes. These new compounds have showed anti-tumour activity against two kinds of cancer cells that are K562 (human chronic myeloid leukemia) and Jurkat (human T lymphocyte carcinoma).
Synthesis, characterization and thermodynamic studies of complexes of dimethyl, diethyl, and diphenyltin(IV) dichlorides with (2H)-1,4-benzothiazine-2,3-(4H)-dione dioxime
Abedien Zabardasti,Ali Kakanejadifard,Leyla Shabani
Bulletin of the Chemical Society of Ethiopia , 2012,
Abstract: The diorganotin(IV) compounds, [Me2SnCl2(H2L)], [Et2SnCl2 (H2L)] and [Ph2SnCl2(H2L)] (H2L = (2H)-1,4-benzothiazine-2,3-(4H)-dione dioxime), were synthesized by treating the appropriate diorganotin(IV) dichloride with H2L in anhydrous ethanol. These complexes were characterized by IR, MS, UV-Vis, and 1H NMR. Thermodynamic studies of the reported complexes have been carried out and their stability were found in the order: [Me2SnCl2(H2L)] > [Et2SnCl2(H2L)] > [Ph2SnCl2(H2L)]. Theoretical calculations at the HF/3-21G* level showed that structures with alkyl groups at axial positions are more stable than their counterparts having alkyl groups at equatorial.DOI: http://dx.doi.org/10.4314/bcse.v26i1.9
An Adaptive -Based Formation Control for Multirobot Systems
Faridoon Shabani,Bijan Ranjbar,Ali Ghadamyari
ISRN Robotics , 2013, DOI: 10.5402/2013/192487
Abstract: We describe a decentralized formation problem for multiple robots, where an formation controller is proposed. The network of dynamic agents with external disturbances and uncertainties are discussed in formation problems. We first describe how to design social potential fields to obtain a formation with the shape of a polygon. Then, we provide a formal proof of the asymptotic stability of the system, based on the definition of a proper Lyapunov function and technique. The advantages of the proposed controller can be listed as robustness to input nonlinearity, external disturbances, and model uncertainties, while applicability on a group of any autonomous systems with -degrees of freedom. Finally, simulation results are demonstrated for a multiagent formation problem of a group of six robots, illustrating the effective attenuation of approximation error and external disturbances, even in the case of agent failure or leader tracking. 1. Introduction All around the world, nature presents examples of collective behavior in groups of insects, birds, and fishes. This behavior has produced sophisticated functions of the group that cannot be achieved by individual members [1, 2]. Therefore, the research on the coordination of robotic swarms has attracted considerable attention. Taking the advantages of distributed sensing and actuation, a robotic swarm can perform some cooperative tasks such as moving a large object that is usually not executable by a single robot [3–7]. Applications about the analysis and design of robotic swarms included autonomous unmanned aerial vehicles, congestion control of communication networks, and distributed sensor networks autonomous, and so forth [1, 2, 8–10]. In general, a robotic formation problem is defined as the organization of a swarm of agents into a particular shape in a 2D or 3D space [8]. This kind of control strategy can be applied into several different fields. For example, in the industrial field, this formation control strategy can be applied to a group of Automated Guided Vehicles (AGVs) moving in a warehouse for goods delivery. The main idea is to make a group of AGVs cooperatively deliver a certain amount of goods, moving in a formation. The creation of a formation with the desired shape is useful to precisely constrain the action zone of the AGVs, thus reducing the chance of collisions with other entities (e.g., human guided vehicles). In the literature, many different approaches to formation control can be found. The main existing approaches can be divided into two categories: centralized [11] and distributed
Genetic variation of Garra rufa fish in Kermanshah and Bushehr provinces, Iran, using SSR microsatellite markers
Ali Shabani, Ghasem Askari,Amin Moradi
Molecular Biology Research Communications , 2013,
Abstract: Six highly variable microsatellite loci were used to investigate the genetic diversity and population structure of the Garra rufa in Kermanshah and Bushehr provinces, Iran. All of the 6 microsatellite loci screened in this study showed polymorphism. A total of 90 individual fish from 3 populations were genotyped and 60 alleles were observed in all loci. The number of alleles per locus ranged from 6 to14. The average allelic number of these polymorphic markers was 10. The averages of observed (Ho) and expected heterozygosity (He) was 0.529 and 0.826, respectively. The genetic distance values ranged between 0.235-0.570. The UPGMA dendrogram based on genetic distance resulted in three clusters: Gamasiab population alone was classified as one and the other two populations as the second cluster. This study revealed a fairly high level of genetic variation in the microsatellite loci within the three populations, and identified distinct population groups of Garra rufa. This study gains significance for the analysis of the populations’ genetic diversity as well as the management of this important fish resource.
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