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Search Results: 1 - 10 of 6454 matches for " Nourozi-Rad Reza "
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Strong interaction between T allele of endothelial nitric oxide synthase with B1 allele of cholesteryl ester transfer protein TaqIB highly elevates the risk of coronary artery disease and type 2 diabetes mellitus
Rahimi Zohreh,Nourozi-Rad Reza,Rahimi Ziba,Parsian Abbas
Human Genomics , 2012, DOI: 10.1186/1479-7364-6-20
Abstract: Background The present study was conducted to investigate the possible outcome of interaction between endothelial nitric oxide (NOS3) G894T and cholesteryl ester transfer TaqIB variants on the risk of coronary artery disease (CAD) and type 2 diabetes mellitus (T2DM). The sample included a total of 207 CAD patients (102 CAD patients with T2DM and 105 CAD patients without T2DM). There were also 101 patients with T2DM and 92 age- and sex-matched healthy individuals as controls. All study participants were from Western Iran. The sample was genotyped by polymerase chain reaction-restriction fragment length polymorphism. Results The presence of NOS3 T allele was not associated with the risk of CAD or T2DM, and the CETP B1 allele was only significantly associated with the increased risk of CAD in total CAD patients (odds ratio (OR) = 5.1, p = 0.019). However, the concomitant presence of both CETP B1 and NOS3 T alleles significantly increased the risk of CAD in total CAD patients (OR = 18.1, p < 0.001), in CAD patients without T2DM (OR = 27.1, p = 0.03), and in CAD patients with T2DM (OR = 13.5, p = 0.002). Also, the presence of both alleles increased the risk of T2DM (OR = 12, p = 0.004). Conclusions Our findings, for the first time, indicate that NOS3 T allele strongly interacts with CETP B1 allele to augment the risk of CAD and T2DM in the population of Western Iran.
Porphyry Copper Mineral Prospectivity Mapping Using Interval Valued Fuzzy Sets Topsis Method in Central Iran  [PDF]
Ali Reza Jafari Rad, W. Busch
Journal of Geographic Information System (JGIS) , 2011, DOI: 10.4236/jgis.2011.34028
Abstract: Geospatial Information System (GIS) provide tools to quantitatively analysis and combination of datasets from geological, geophysical, remote sensing and geochemical surveys for decision-making processes. Excellent coverage of well-documented and good quality data enables testing of variable exploration modeling in an efficient way. The study area of this research is the most important part of Cu (Mo) porphyry—type mineralization belt in Iran. There are some well-known porphyry copper deposits in this region like Sarcheshmeh and Meiduk mines, but certainly there are same grounds to search for new porphyry deposits. The risks of developing mineral resources need to be known as accurately as possible, with regarding to all features those are effective in mineralization. These features can be recognized respect to Critical Genetic Factors (CGF’s) using Critical Recognition Criteria (CRC) for each type of mineralization. CGF’s can be employed for designing a Conceptual Genetic Model (CGM). Evidence maps create on the basis of CGM and then integrate together for production of Mineral Prospectivity Map (MPM). This map categorizes the areas based on their exploration importance. There are several techniques for creation of MPM. Interval Valued Fuzzy Sets (IVFSs) TOPSIS method was applied in this research. This method as a knowledge-driven method, allocate appropriate weights to layers on the basis of the effective membership, non membership, and non-certainty. The fundamental concept of TOPSIS is that the chosen alternatives should have the shortest distance from the positive ideal points (A*) and the farthest distance from negative ideal points (A-).
On an M/G/1 Queueing Model with k-Phase Optional Services and Bernoulli Feedback  [PDF]
Sayeedeh Abdollahi, Mohammad Reza Salehi Rad
Journal of Service Science and Management (JSSM) , 2012, DOI: 10.4236/jssm.2012.53033
Abstract: In this article an M/G/1 queueing model with single server, Poisson input, k-phases of heterogeneous services and Bernoulli feedback design has been considered. For this model, we derive the steady-state probability generating function (PGF) of queue size at the random epoch and at the service completion epoch. Then, we derive the Laplace-Stieltjes Transform (LST) of the distribution of response time, the means of response time, number of customers in the system and busy period.
In vitro Plant Regeneration Through Anther Culture of Some Iranian Local Rice (Oryza sativa L.) Cultivars
Reza Talebi,Mohammad Reza Rahemi,Habibolah Arefi,Mohammad Nourozi
Pakistan Journal of Biological Sciences , 2007,
Abstract: In this study, effect of different genotypes, different callus induction and regeneration media were investigated using seven Iranian local rice. Anthers were cultured on N6, Fj and L8 media containing the same hormonal combination 3 mg L-1 NAA, 0.5 mg L-1 Kn and 0.5 mg L-1 2, 4-D and incubated at 25± 1° C in dark for callus induction. All varieties in L8 medium, five varieties in Fj medium and six varieties in N6 medium produced highest percentage of callus. Calli induced in different induction media were transferred to SK 11 and N 19 medium and incubated at 25± 1° C in light for plantlet regeneration. Among seven varieties upon transfer to SK 11 medium, highest percentage (40%) of green plants were produced in Hassani and in N 19 medium the highest percentage (15.78) of green plants and albino plants (21.05) were produced in Anbarbo. The finding in the present investigation showed that the successfully emberyogenesis and green plant regeneration in rice anther culture dependent on medium culture components and are affected by the genetic mack-up of the plants.
Application of h-point standard addition method for simultaneous spectrophotometric determination of hydrochlorothiazide and propranolol
Hajian, Reza;Shams, Nafiseh;Rad, Ardeshir;
Journal of the Brazilian Chemical Society , 2009, DOI: 10.1590/S0103-50532009000500009
Abstract: the applicability of h-point standard addition method (hpsam) to resolving overlapping spectra corresponding to the hydrochlorothiazide and propranolol was verified. the results show that the hpsam is suitable for the simultaneous determination of hydrochlorothiazide and propranolol in aqueous media. the results of applying the hpsam showed that the two drugs could be determined simultaneously with the concentration ratios hydrochlorothiazide:propranolol varying from 1:20 to 10:1 in a mixed sample. the proposed method has been successfully applied to the simultaneous determination of hydrochlorothiazide in the presence of propranolol in some synthetic samples. moreover, the applicability of the method was demonstrated by their determination in some biological fluids.
Limit Analysis of Oscillating Batch Arrival M[x]/G/1 Systems with Finite Capacity: EMC Approach
Mohammad Taremi,Mohammad Reza Salehi Rad
Journal of Economics Theory , 2012, DOI: 10.3923/jeth.2012.29.36
Abstract: An oscillating M/G/1 Systems with finite capacity and batch arrivals is considered under partial batch acceptance strategy. Applying the Theory of Markov Regenerative Processes and resorting to Markov chain embedding the limit distributions of the number of customers in the system is obtained where no assumption on the batch size distribution is made.
Analyze the Duration of Busy Period in M|X|/G/1/K Systems with Vacation Time and under the Partial Batch Acceptance Strategy
Mohammad Taremi,Mohammad Reza Salehi Rad
Journal of Economics Theory , 2012, DOI: 10.3923/jeth.2011.106.109
Abstract: One of the main characteristics in optimization and performance evaluation in a Queueing Model is its busy period. Finding the exact distribution of this variables in Queueing Models which service distribution and or inter-arrival distribution is general is so complicated and there is usually no closed formula for that. Traditionally in these situations, Laplase-Stieltjes transform this variable computed and then by using that the moments it determined.
The Effect of Form versus Meaning-Focused Tasks on the Development of Collocations among Iranian Intermediate EFL Learners
Reza Pishghadam,Ebrahim Khodadady,Naeemeh Daliry Rad
English Language Teaching , 2011, DOI: 10.5539/elt.v4n2p180
Abstract: This study attempts comprehensively to investigate the effect of form versus meaning-focused tasks on the development of collocations among Iranian Intermediate EFL learners. To this end, 65 students of Mashhad High schools in Iran were selected as the participants. A general language proficiency test of Nelson (book 2, Intermediate 200A) was used to measure their general language ability. Moreover, a teacher-made collocation test was implemented to examine the participants’ collocation knowledge. Participants were divided into: form-focused instruction group (FFI), meaning-focused instruction (MFI) group, and a control group. The FFI group performed dictogloss task (DT) which focused on both target items and meaning. The MFI group assigned communicative task (pair /group discussion task) which did not required attention to the target items. The control group is designated as the Conventional Group, simply to reflect the fact that they did not receive focus-on-form instruction but rather received combination of explaining collocation or new vocabulary and reading a text silently to mention its main idea or answer to comprehension questions. The results revealed the fact that FFI group (dictogloss task) significantly outperformed the other two groups on the collocation test.
Executive Dysfunction in Children and adolescents with Attention Deficit Hyperactivity Disorder (ADHD)
Mehdi Tehrani-Doost,Reza Rad Goodarzi,Javad Alaghband-Rad
Iranian Journal of Psychiatry , 2007,
Abstract: "nObjective: The purpose of this study is to compare the executive functions children and adolescents who suffer from attention deficit hyperactivity disorder "n(ADHD) with normal children. "nMethod: Twenty children with ADHD were compared to 19 healthy children terms of some executive functions using the computerized version of Tower London, Continuous Performance Test (CPT), and Stroop Color Test. "nResults: In "Tower of London", the performance of children with ADHD was "nworse than normal children (p<0.05). In Continuous Performance Test, the "ncommission errors in children with ADHD were significantly more than the "nnormal group (p<0.01). In Stroop Test, the time spent to name the colors was "nsignificantly higher in ADHD group. A significant correlation was also found "nbetween the performance of children on Tower of London and CPT (P<0.05). "nConclusions: This study demonstrates that children and adolescents who "nsuffer from ADHD have some impairment of executive functions, particularly "nplanning and inhibition to response, but not in attention.
Synthesis of Nanocrystalline WC Single-Phase Refractory via Mechanical Milling
Mansour Razavi,Mohammad Reza Rahimipour,Rahim Yazdani-Rad
Journal of Nanomaterials , 2011, DOI: 10.1155/2011/540540
Abstract: In this paper the possibility of production of nanocrystalline WC single-phase by mechanical milling has been investigated. The raw materials containing tungsten and carbon with WC as nucleation were milled in a planetary ball mill and sampled in different times. Studies showed that after 75 hours of milling the WC with W2C was produced and remained constant in higher milling time. Adding WC to raw materials at the beginning process leads to the fact that after 50 hours of milling only WC was synthesized without undesirable W2C phase. This material remained stable until higher times of milling too. From broadening of XRD peaks, the crystalline size in synthesized WC was estimated in nanometer scale which lower than the system containing primary WC, and it means that the strain in this system was lower than first system. 1. Introduction Tungsten carbide (WC) is an inorganic chemical compound. In its most basic form, it is a fine gray powder, but it can be pressed and formed into shapes for use in industrial machinery, tools, abrasives, as well as jewelry due to high hardness (2600?HV), good toughness, high melting point (2780°C), high wear resistance, suitable resistance in thermal shock, and good thermal conductivity. Also natural resistance to oxidation and corrosion of this material at high temperature cause the increase usage of this material as coating in high temperature [1–6]. Tungsten carbide can be prepared by reaction of tungsten metal and carbon at 1400–2000°C under vacuum or inner gas with high purity, is the conventional method for production of this material but this process which still needs high cost [2, 7]. Other methods include a patented fluid bed process that reacts either tungsten metal or blue WO3 with CO/CO2 mixture and H2 between 900 and 1200°C [8]. In addition to self-propagating techniques, organometallic precursor, solution state, and electrochemical methods have been utilized for production of this carbide, but each of these methods has their specific advantages and disadvantages [9]. Due to limitations for synthesizing this material with traditional methods (mentioned above) and considering the fact that range of tungsten carbide in the phase diagram is narrow, mechanical milling can be a suitable method for production of this in nanometer scale [8, 10]. There are two well-characterized compounds of tungsten and carbon, WC and tungsten semicarbide, W2C. Usually during the production process of tungsten carbide, WC and W2C are synthesized together [2, 10–13]. Presence of W2C with WC can reduce mechanical and tropological
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