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Arak, Iran

Arak University is a university in Arak, in Markazi Province of Iran.The university was established in 1971 as The College of Marjan with the assistance of the University of Tehran and Tarbiat Moallem University.In 1989 the college attained university status. The university currently offers degrees in three colleges in 28 fields for both undergraduate and graduate students.Nowadays it has many different majors and 4 faculties as humanities, science, engineering and agriculture.Engineering faculty has these majors: Chemical engineering, Civil engineering, Electrical engineering, Materials engineering, Computer engineering, Industrial engineering, Mechanical engineering. Wikipedia.

Edalat-Nejad M.,Arak University
Saudi journal of kidney diseases and transplantation : an official publication of the Saudi Center for Organ Transplantation, Saudi Arabia

The purpose of this study was to determine the quality of life and sleep of chronic hemodialysis (HD) patients. Quality of sleep was measured using the Pittsburgh Sleep Quality Index (PSQI) and quality of life (QoL) was measured using the Medical Outcomes Study 36-item Short Form (SF-36) in 115 HD patients. One hundred (87%) patients were "poor sleepers" (global PSQI ≥5). The SF-36 mental component summary and physical component summary (PCS) scores were higher than 50 only in 43% and 32% of the subjects, respectively. No significant differences were found in QoL and sleep according to the patient's gender, presence of diabetes and time on HD. Correlation between total SF-36 score and global PSQI was statistically significant (r = -0.227, P <0.05). Poor sleep is common in dialysis patients and is associated with lower QoL, especially with mental health component of life quality. Source

Present study has explored the effect of salinity stress on growth, mineral composition, proline content, antioxidant enzymes of soybean. Soil salinity is a major limitation to legume production in many areas of the world. The salinity sensitivity of soybean was studied. Soybean plants were exposed to 0, 50, 100 and 200 mM NaCl. The effect of salinity on length and fresh weight of seedling were determined. Increasing salinity level to 50, 100 and 200 mM resulted in a reduction of plant height of 30, 47 and 76% and a reduction of fresh weight of 32, 54 and 76%, respectively. The activity of nitrogenase and Ammonium content of nodules were measured by analyzing ethylene in the gas samples by chromatography and the phenol-hypochlorite method, respectively. Nitrogenase activity had a decrease of 60% and ammonium content a significant increase (100%) at 200 mM salt concentration. Proline accumulation and diamine oxidase, DAO, were studied by reading the absorption of chromophore at 520 nm using spectrophotometer. Seedlings subjected to salt stress in the presence. Both DAO activity and proline content were increased in soybean under 50 to 200 mM NaCl. Using atomic absorption spectrophotometer, ion uptake of for Na+, K+, Ca2+ and Mg2+ were determined. The Na+ content significantly increased but the contents of K+, Ca2+ and Mg2+ decreased significantly as salinity treatment concentrations increased. The behaviour of antioxidant enzymes was analyzed. A significant decrease in superoxide dismutase, catalase and peroxidase activities under 100 and 200 mM salt were found. © 2010 Academic Journals Inc. Source

Ghorbani K.,Arak University
Journal of Cosmology and Astroparticle Physics

We consider a renormalizable extension of the standard model whose fermionic dark matter (DM) candidate interacts with a real singlet pseudo-scalar via a pseudo-scalar Yukawa term while we assume that the full Lagrangian is CP-conserved in the classical level. When the pseudo-scalar boson develops a non-zero vacuum expectation value, spontaneous CP-violation occurs and this provides a CP-violated interaction of the dark sector with the SM particles through mixing between the Higgs-like boson and the SM-like Higgs boson. This scenario suggests a minimal number of free parameters. Focusing mainly on the indirect detection observables, we calculate the dark matter annihilation cross section and then compute the DM relic density in the range up to mDM = 300 GeV.We then find viable regions in the parameter space constrained by the observed DM relic abundance as well as invisible Higgs decay width in the light of 125 GeV Higgs discovery at the LHC. We find that within the constrained region of the parameter space, there exists a model with dark matter mass mDM ∼ 38 GeV annihilating predominantly into b quarks, which can explain the Fermi-LAT galactic gamma-ray excess. © 2015, Institute of Physics Publishing. All rights reserved. Source

Amirjani M.R.,Arak University
International Journal of Botany

Salinity is a major yield-reducing factor in coastal and arid, irrigated rice production systems. Rice seedlings cv. Tarom Azmoon was exposed to 200 mM NaCl for 14 days. Plant growth, relative water content, pigment and sugars content, photosynthetic efficiency and enzyme activity of rice seedlings grown under salt stress were investigated Shoot length of treated seedlings decreased to about 71% compare to the control. Salinity stress caused an increase in root length of seedlings. Root length of treated seedlings was about 54% more than the control. Fresh weights and dry weights of treated seedlings reduced to 95 and 75%, respectively. Salinity stress caused reduction in leaf relative water contents from 87% in the control plants to 74% in the stressed plants. The reduction of chlorophyll a and b contents of leaves was detected after NaCl treatment in leaves. Under salt stress, reduction of the chlorophyll b content of leaves (41%) was more affected than the chlorophyll a content (33%). The maximum quantum yield of PSII (Fv/FM), photon yield of PSII (ΦPSII) non-photochemical quenching (NPQ) and net photosynthetic rate (Pn) in the stressed seedlings were inhibited, leading to overall growth reduction. The positive correlations between chlorophyll a content and Fv/Fm, total chlorophyll content and ΦPSII, Pn as well as Pn and leaf area were found. Sugar content in shoots had a significant increase under salinity stress. The starch content of roots seedlings decreased NaCl stressed seedling. The contents of total, reducing and non reducing sugars increased in roots. © 2011 Asian Network for Scientific Information. Source

The F3YLi⋯NCH⋯HMH and F 3YLi⋯HMH⋯HCN triads (Y=C, Si; M=Be, and Mg) are connected by lithium and dihydrogen bonds. To understand the properties of the systems better, the corresponding dyads are also studied. Molecular geometries, binding energies, infrared spectra and NMR properties of monomers, dyads, and triads are investigated at the MP2/6-311++G** computational level. Particular attention is paid to parameters, such as cooperative energies, and many-body interaction energies. Triads with the HMH molecule located at the end of the chain, show energetic cooperativity ranging between -3.66 to -7.59 kJ mol-1. When the HMH molecule is located in the middle, the obtained cluster is diminutive with an energetic effect between 3.49 to 5.17 kJ mol -1. The electronic properties of the complexes are analyzed using parameters derived from the atoms in molecules (AIM) methodology. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source

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