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匹配条件: “Seyed Ali Madani Tonekaboni” ,找到相关结果约20383条。
Analytical Solution of Substrate Concentration in the Biosensor Response  [PDF]
Seyed Ali Madani Tonekaboni, Ali Shahbazi Mastan Abad, Amin Afshari, Ali Khalilzadeh, Shahab Karimi, Mitra Shabanisamghabady
Applied Mathematics (AM) , 2013, DOI: 10.4236/am.2013.412217

Homotopy analysis method (HAM) 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 of the problem are obtained for different values of the dimensionless parameters. Accuracy of the obtained results is verified by comparing them with the available actual and simulated ones. It is concluded that the obtained solution can be considered as a promising one to investigate different aspects of the phenomena.

On the Study of Magneto-Hydrodynamic Non-Newtonian Fluid Flow throughout Curvilinear Channel with Corrugated Walls  [PDF]
Seyed Ali Madani Tonekaboni, Hamid Reza Gharahi, Mohammad Hossein Motevaselian, Seyed Fouad Karimian, Sara Jahromi
Open Journal of Modelling and Simulation (OJMSi) , 2014, DOI: 10.4236/ojmsi.2014.24014
Abstract: This article aims to numerically investigate the flow pattern for Newtonian and power law non-Newtonian fluid in a semi-half circular channel with corrugated walls under the influence of a magnetic field. The results indicate that, presence of a magnetic field affects the flow field in several aspects, especially in the vortex creation and dissipation. In addition, the analysis is carried out for different Reynolds numbers to ascertain the influence of magnetic field on each flow regime. Eventually, the analysis is carried out for a range of power indices including pseudo plastic (shear-thinning) to dilatants (shear-thickening) fluids. The results show that by increasing the power-index, the vortices begin to form and grow gradually so that in the shear-thickening fluid an extra vortex is formed and created nearby the corrugated part of the channel.
On the Study of Viscoelastic Walters' B Fluid in Boundary Layer Flows
Seyed Ali Madani Tonekaboni,Ramin Abkar,Reza Khoeilar
Mathematical Problems in Engineering , 2012, DOI: 10.1155/2012/861508
Abstract: Viscoelastic Walters' B fluid flows for three problems, stagnation-point flow, Blasius flow, and Sakiadis flow, have been investigated. In each problem, Cauchy equations are changed to a nondimensional differential equations using stream functions and with assumption of boundary layer flow. The fourth-order predictor-corrector finite-difference method for solving these nonlinear differential equations has been employed. The results that have been obtained using this method are compared with the results of the last studies, and it is clarified that this method is more accurate. It is also shown that the results of last study about Sakiadis flow of Walter's B fluid are not true. In addition, the effects of order of discretization in the boundaries are investigated. Moreover, it has been discussed about the valid region of Weissenberg numbers for the second-order approximation of viscoelastic fluids in each case of study.
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

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.

A Comparison of Buccal Midazolam and Intravenous Diazepam for the Acute Treatment of Seizures in Children
Seyed-Hassan Tonekaboni,Farhad Mahvelati Shamsabadi,Seyed-Saeed Anvari,Ali Mazrooei
Iranian Journal of Pediatrics , 2012,
Abstract: Objective: The purpose of the present study is to compare efficacy and safety of buccal midazolam with intravenous diazepam in control of seizures in Iranian children.Methods: This is a randomized clinical trial. 92 patients with acute seizures, ranging from 6 months to 14 years were randomly assigned to receive either buccal midazolam (32 cases) or intravenous diazepam (60 cases) at the emergency department of a children's hospital. The primary outcome of this study was cessation of visible seizure activity within 5 minutes from administration of the first dosage. The second dosage was used in case the seizure remained uncontrolled 5 minutes after the first one.Findings: In the midazolam group, 22 (68.8%) patients were relieved from seizures in 10 minutes.Meanwhile, diazepam controlled the episodes of 42 (70%) patients within 10 minutes. The difference was,however, not statistically significant (P=0.9). The mean time required to control the convulsive episodes after administration of medications was not statistically significant (P=0.09). No significant side effects were observed in either group. Nevertheless, the risk of respiratory failure in intravenous diazepam is greater than in buccal midazolam.Conclusion: Buccal midazolam is as effective as and safer than intravenous diazepam in control of seizures.
Prevalence and Symptoms of Idiopathic Hypercalciuria in Primary School Children of Tehran
Seyed Taher Esfahani,Abbas Madani,Ali Ashraf Siadati,Mohammad Nabavi
Iranian Journal of Pediatrics , 2007,
Abstract: Objective: Determining prevalence of idiopathic hypercalciuria (IH) in primary school children of Tehran. Material & Methods: We evaluated 778 primary school children (age 6-11, mean 9.1 years) in two steps: first (Screening test), we measured urine calcium to urine creatinine ratio (UCa/UCr) and in the second step (Definitive test), for those children who had UCa/UCr ratio more than 0.21 mg/mg we measured 24 hours urine calcium excretion. Children with secondary forms of hypercalciuria were excluded from the study. Children with idiopathic hypercalciuria were evaluated for manifestations of IH.Findings: Among 778 children, 195 (25.1%) had UCa/UCr ratio more than 0.21 mg/mg, but from these 195 children only 128 children delivered 24 hours urine samples. Among these 128 children for whom 24 hours urine calcium measurements were done 28 children excreted more than 4mg/kg/day calcium without hypercalcemia or any other known causes of hypercalciuria and we defined them as having idiopathic hypercalciuria. If all 195 suspicious cases of IH had delivered 24-hrs urine samples we would have 42 cases of IH.Conclusion: Prevalence of IH in our children was 5.4% and its manifestations were: hematuria, dysuria, recurrent abdominal pain, urinary incontinence, urgency, urinary tract infections and urolithiasis.
Metal ion–binding properties of the L-aspartic acid and tartaric acid, a coparative investigation. How can be increased the dosage of mineral absorption in the body  [PDF]
Seyed Ali Akbar Sajadi
Advances in Bioscience and Biotechnology (ABB) , 2010, DOI: 10.4236/abb.2010.14047
Abstract: A comparative research has been developed for acidity and stability constants of M(TTA)1 and M(Asp)2 complexes which have been determined by potentiometric pH titration. Depending on metal ion–binding properties, vital differences in building complex were observed. The present study shows that in M(TTA) complexes, metal ions are coordinated to the carboxyl groups, but in M(Asp) some metal ions are able to build macrochelate over amine group. Hence, the following intermolecular and as a result independent concentration equilibrium between an open–isomer M(Asp)op and a closed–isomer M(Asp)cl, has to be considered cl op. The amounts are reported. The results mentioned above demonstrate that for some M(Asp) complexes the stability constants is also largely determined by the affinity of metal ions for amine group. This leads to a kind of selectivity of metal ions and transfer them via building complexes with the aspartate. The result of this effect is a higher dosage-absorption of minerals in body. Based on the sort of metal ions, the drug-therapy can be different. For heavy metal ions this building complex helps the absorption and filtration of the blood plasma, and consequently the excursion of heavy metal ions takes place. This is an important method in microdialysis. Other metal ions such as the complexes can be considered as mineral carriers. These complexes in certain conditions (PH–range) can release the minerals in body.
A comparative investigation of interaction between metal ions with L-methionene and related compounds such as alanine, leucine, valine, and glycine in aqueous solution  [PDF]
Seyed Ali Akbar Sajadi
Advances in Bioscience and Biotechnology (ABB) , 2010, DOI: 10.4236/abb.2010.1109
Abstract: The acidity and stability constants of M-L (M: M2+; L: Met, L-methionine) complexes, determined by potentiometric pH titrations, were used to make a comparative investigation. The stability constants of the 1:1 complexes formed between M2+ and L–, were determined by potentiometric pH titration in aqueous solution (I = 0.1 M, NaNO3, 25°C). The order of the stability constants was reported. It is shown that regarding to M ion – binding properties, vital differences on complex bilding were considered. It is demonstrated that in M-L complexes, M ion is coordinated to the carboxyl group, is also able to bild macrochelate over amine group. The aforementioned results demonstrate that for M (Met) complex, the stability constants are also largely determined by the affinity of Cu ion for amino group. It is indicated that this additional interaction with amino groups can influence the character of some amino acid complexes in biological systems.
Effective Solution of Riemann Problem for Fifth Order Improperly Elliptic Equation on a Rectangle  [PDF]
Seyed Mohammadali Ali. Raeisian
American Journal of Computational Mathematics (AJCM) , 2012, DOI: 10.4236/ajcm.2012.24038
Abstract: In this paper we present a numerical method for solving Riemann type problem for the fifth order improperly elliptic equation in complex plane .We reduce this problem to the boundary value problems for properly elliptic equations, and then solve those problems by the grid methods.
Hearing Evaluation in Children with Meningitis by Auditory Brainstem Response and Otoacoustic Emissions
Seyed Hassan Tonekaboni,Farhad Mahvelati Shamsabadi,Omid Khojasteh
Iranian Journal of Pediatrics , 2007,
Abstract: Objective: Meningitis is one of the most important causes of sensorineural hearing loss in childhood. Because of the critical situation of patients, proper attention is not usually paid to hearing assessment in meningitis. By early detection and medical intervention at proper time, the retadation of lingual development can be avoided.Material & Methods: The hearing function of 40 children with meningitis was evaluated at 24-72 hours after diagnosis (acute period) and 24 hours before discharging from hospital (recovery period) with auditory brainstem responses (ABR). All patients 7-14 days after discharge underwent thorough investigation by detecting otoacoustic emissions test (OAE).Findings: Using the ABR test, during the acute period, 35 (87.5%) patients had normal hearing and in 5 (12.5%) patients severe to profound sensorineural hearing loss was detected. The same results were obtained during recovery period. OAE test showed normal hearing in 37 (92.5%) patients and impaired cochlear function in 3 (7.5%) patients.Conclusion: Early detection of hearing loss in the acute and recovery period of meningitis can be made by ABR and OAE tests.

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