Kermanshah, Iran
Kermanshah, Iran

Razi University is a public university based in Kermanshah, Iran.It is a center of research in many STEM fields such as CFD , membrane research, nano-science and nanotechnology. Razi University is ranked first in western Iran and third among Iran's public universities. The school's Science and Engineering departments attract many Iranian high school graduates as well as many graduate school applicants from all over Iran with a majority admitted from western provinces.The university has over 8,000 students, enrolled in several bachelor's , master's , and Ph.D. programs. Wikipedia.

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Dehnavi E.,Razi University | Abdi H.,Razi University
IEEE Transactions on Power Systems | Year: 2017

Demand response (DR) can be counted as an effective congestion management method in power systems. However, appointing the optimal buses for the demand response programs (DRPs) implementation is one of the main challenges for the power system operators. In this paper, a new procedure has been developed by which the optimal locations and times of DRPs implementation are determined. Optimal buses are identified based on the power transfer distribution factors (PTDFs), available transfer capability, and dynamic dc optimal power flow problem. Applying the developed method results in reducing lines' congestion, increasing customers, and independent system operator's benefits, improving load curve's characteristics, preventing line outages and black outs, and consequently increasing the network reliability. The proposed method has been applied on the IEEE 39-bus New England test system. Results indicate the effectiveness and practical benefits of the proposed method. © 1969-2012 IEEE.

Background: Knowledge of diversity and variability of different plants is a main prerequisite and the first step in extraction of main compounds of them. The objective of the current research was to investigate main chemical composition of the essential oils of Ferulago angulata (Schlecht.) Boiss aerial parts collected from western parts of Iran (Kurdestan, Kermanshah and Lorestan provinces). Methods: Identification of the essential oils was performed by analytical gas chromatograph coupled with mass spectrometer detector (GC/MS). Results: The major compounds of essential oils of the aerial parts of plants were α-pinene (25.82%), Z-β-ocimene (23.48%), bornyl acetate (9.94%), germacrene D (4.01%), myrcene (3.06%), ?-terpinene (3%), limonene (2.27%) and p-cymene (1.99%). Conclusions: Our findings indicate that the main components of the essential oils belong to monoterpene hydrocarbons, oxygenated monoterpenes and sesquiterpene hydrocarbons.

Bahari K.,Razi University
Solar Physics | Year: 2017

Transverse oscillations of a thin coronal loop in a zero-beta plasma in the presence of a twisted magnetic field and flow are investigated. The dispersion relation is obtained in the limit of weak twist. The twisted magnetic field modifies the phase difference and asymmetry of standing kink oscillations caused by the flow. Using data from observations the kink speed and flow speed have been determined. The presence of the twisted magnetic field can cause underestimation or overestimation of the flow speed in coronal loops depending on the direction of the flow and twisted magnetic field, but a twisted magnetic field has little effect on the estimated value of the kink speed. © 2017, Springer Science+Business Media B.V.

Cholesterol oxidase (ChOx) and catalase (CAT) were co-immobilized on a graphene/ionic liquid-modified glassy carbon electrode (GR-IL/GCE) to develop a highly sensitive amperometric cholesterol biosensor. The H2O2 generated during the enzymatic reaction of ChOx with cholesterol could be reduced electrocatalytically by immobilized CAT to obtain a sensitive amperometric response to cholesterol. The direct electron transfer between enzymes and electrode surface was investigated by cyclic voltammetry. Both enzymes showed well-defined redox peaks with quasi-reversible behaviors. An excellent sensitivity of 4.163mAmM-1cm-2, a response time less than 6s, and a linear range of 0.25-215μM (R2>0.99) have been observed for cholesterol determination using the proposed biosensor. The apparent Michaelis-Menten constant (KMapp) was calculated to be 2.32mM. The bienzymatic cholesterol biosensor showed good reproducibility (RSDs<5%) with minimal interference from the coexisting electroactive compounds such as ascorbic acid and uric acid. The CAT/ChOx/GR-IL/GCE showed excellent analytical performance for the determination of free cholesterol in human serum samples. © 2013 Elsevier B.V.

Boroun G.R.,Razi University
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2015

The proposed linear and nonlinear behavior for the top structure function at the LHeC is considered. We present the conditions necessary to predict the top structure function F2t(x,Q2) with respect to the different predictions for the behavior of the gluon at low x. © 2014 The Author.

Boroun G.R.,Razi University
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2015

We consider the ratio of the top structure functions Rt(τt) in top pair production as a probe of the top content of the proton at the LHeC project. We study the top structure functions with the geometrical scaling of gluon distribution at small x and show that top reduced cross section exhibits geometrical scaling in a large range of photon vitualities. This analysis shows that top longitudinal structure function has sizeable impact on the top reduced cross section at Q2≈4mt2. © 2015 The Author.

Wastewater of petrochemical industries contains high amounts of emulsified aliphatic or aromatic hydrocarbons that lead to the contamination of almost all environmental resources. The ability of Haloarcula sp. IRU1 isolated from Urmia lake, Iran for utilization of petrochemical wastewater and production of poly(3-hydroxybutyrate) (PHB) from it was evaluated and optimized by Taguchi experimental method. The optimium conditions for the maximum production of PHB were petrochemical wastewater 2% (as carbon source), tryptone 0.8% (as nitrogen source), KH2PO4 0.001% (as phosphorus source) and temperature 47°C. In conclusion, Haloarcula sp. IRU1 can degrade petrochemical wastewater and produce PHB from it in different conditions. © 2011 Elsevier B.V.

Boroun G.R.,Razi University
Nuclear Physics B | Year: 2014

We study the structure functions Fkb(x,Q2) (k = 2, L) and the reduced cross section σrb(x,Q2) for small values of Bjorken's x variable with respect to the hard (Lipatov) pomeron for the gluon distribution and provide a compact formula for the ratio R b that is useful to extract the beauty structure function from the beauty reduced cross section, in particular at DESY HERA. Also we show that the effects of the nonlinear corrections to the gluon distribution tame the behavior of the beauty structure function and the beauty reduced cross section at low x. © 2014 The Author.

Naderi D.,Razi University
Physical Review C - Nuclear Physics | Year: 2012

In this paper, the fission rate and fission probability are calculated using the Langevin dynamical approach. We employed the Langevin equations to calculate the fission probability of a hot compound nucleus and investigated the role of one- and two-body dissipation mechanisms on the fission rate and fission probability. The obtained results using one-body dissipation are lower than results based on two-body dissipation. Calculations are done for 19F +159Tb, 19F +169Tm, 19F +181Ta, and 16O +197Au reactions. It is concluded that agreement between experimental data and results of one-body dissipation, especially in lower energies, is better than calculations based on two-body viscosity. © 2012 American Physical Society.

Parvin M.H.,Razi University
Electrochemistry Communications | Year: 2011

This work describes a novel type of working electrode for use in voltammetry methods. Graphene is ideally suited for implementation in electrochemical applications due to its reported large electrical conductivity, large surface area, unique heterogeneous electron transfer rate, and low production costs. This paper presents a method for the construction of graphene paste electrode (GPE) from graphene. The GPE is not needed to be modified, because the surface of graphene is functionalized. Direct electrochemical detection of drug is of high importance in analytical chemistry. Here, the GPE was successfully used for the determination of chlorpromazine. © 2011 Elsevier B.V. All rights reserved.

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