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Search Results: 1 - 10 of 42 matches for " Behrokh Shojaie "
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Characterization of seed storage protein patterns of four Iranian Pistachios using SDS-PAGE  [PDF]
Ali Akbar Ehsanpour, Behrokh Shojaie, Fatemeh Rostami
Natural Science (NS) , 2010, DOI: 10.4236/ns.2010.27092
Abstract: We used SDSPAGE to evaluate and characterize the protein patterns of seed storage proteins in four pistachios cultivars (Akbari, Ahmad Aghaei, Fandoghi, and Kaleghouchi). Total protein content of pistachio seeds in all cultivars did not show any significant difference. Results of SDS PAGE pattern of a few protein bands were up regulated whereas some other bands showed down regulation. The identified protein patterns may be used protein marker for pistachio cultivars.
The Variable-c Cosmology as a Solution to Pioneer Anomaly
Hossein Shojaie
Physics , 2010, DOI: 10.1139/p2012-009
Abstract: It is shown that the Pioneer anomaly is a natural consequence of variable speed of light cosmological models wherein the speed of light is assumed to be a power-law function of the scale factor (or cosmic time). In other words, the Pioneer anomaly can be regarded as a non-gravitational effect of the continuously decreasing speed of light which indicates itself as an anomalous light propagation time delay in local frames. This time delay is accordingly interpreted as an additional Doppler blue shift.
Pioneer Anomaly in Perturbed FRW Metric
Hossein Shojaie
Physics , 2012,
Abstract: In this manuscript, it is shown that the Pioneer anomaly is the local evidence for an expanding universe. In other words, its value is a direct measure of the Hubble constant while its sign shows the expanding behavior of the dynamics of the universe. This analysis is obtained by studying the radial geodesic deviation of the light rays in the perturbed Friedmann-Robertson-Walker metric in the Newtonian gauge.
The prevalence of pre-hypertension and its association to established cardiovascular risk factors in south of Iran
Karamatollah Rahmanian, Mohammad Shojaie
BMC Research Notes , 2012, DOI: 10.1186/1756-0500-5-386
Abstract: In this cross-sectional study a representative sample of 892 participants aged ≥30?years was selected using a multistage cluster sampling method. After completion of a detailed demographic and medical questionnaire (gender, age, history of diabetes mellitus and hypertension, taking antihypertensive or hypoglycemic agents and history of smoking), all participants were subjected to physical examination, blood lipid profile, blood glucose, anthropometric and smoking assessments, during the years 2009 and 2010. Variables were considered significant at a p-value?≤?0.05. Statistical analysis was performed using SPSS version 11.5 software.Pre-hypertension was observed among 300 (33.7%) subjects, 36.4% for men and 31.4% for women (p?>?0.05). The pre-hypertensive group had higher levels of blood glucose and triglycerides, higher body mass index and lower percentage of smoking than did the normotensive group. Multivariate logistic regression analysis showed that obesity and overweight were the strongest predictors of pre-hypertension [odds ratio, 2.74: 95% CI (Confidence Interval), 1.62 to 4.62 p?<?0.001; odds ratio, 2.56, 95% CI, 1.74 to 3.77, p?<?0.001 respectively].Overweight and obesity are major determinants of the high prevalence rate of pre-hypertension detected in Iranian population. Therefore, primary prevention strategies should concentrate on reducing overweight and obesity if the increased prevalence of pre-hypertension is to be diminished in Iranian adults.High blood pressure is an important subject in primary care in the 21st century and has become growing worldwide, especially in developing countries [1]. Furthermore, hypertension is one of the most important health problems because of its relation to ischemic heart disease, which is the leading cause of death [2]. The prevalence of hypertension is 8-14% in population, worldwide [3]. In Iran, the Iranian Health Profile Survey (IHPS) of 1999 reported a hypertension prevalence of 12.54% in adults older than 30?ye
Determination of impurities in Nifedipine, Clofibrate, Atenolol, timolol, propranolol and Ranitidne by HPLC
A. Shafiee,F. Shojaie
DARU : Journal of Pharmaceutical Sciences , 1992,
Abstract: In this work the impurities of the title compounds were investigated by HPLC. the samples were collected from drug stores and the Bulk Chemicals were obtained from manufacturers. The samples were dissolved in suitable solvents before analysis. The Detector was UV and the Cloumn was bondapack Cjg(30 cmx3.9 mm). In the case of timolol the colum was microbondapack CN."nThe impurity in nifedipine was 2, 6 - dimethyl -3,5-dicarbomethoxy - 4-Nitrosophenylpyridine; in clofibrate was para - chlorophenol; in atenollol was p - hydroxyphenylacetamide; in ranitidine was ranitidine - N-oxide, 2,2-dimethylthiol - nitroethene and two unknown compounds. In timolol and propranolol one impurity was detected. The amount of impurities in all compounds were in acceptable range.
Evaluation of the Effects of Intravenous Ascorbic Acid on Correction of Anemia in Renal Failure Patients Undergoing Hemodialysis
M Rahimian,AA Shojaie
Journal of Shahid Sadoughi University of Medical Sciences , 2006,
Abstract: Introduction: Hemodialysis patients often develop resistance to recombinant human erythropoietin due to functional Iron Deficiency. In these patients iron therapy can be hazardous leading to hemosiderosis. Recent studies have suggested that intravenous ascorbic acid may be able to improve this hyporeponsiveness. The aim of this study was to evaluate the effect of intravenous ascorbic acid on functional iron deficiency and whether it results in better correction of anemia or not. Methods: Forty hemodialysis patients with serum ferritin >300ug/l, hemoglobin less than 10 gm/dl, and transferrin saturation less than 20% were selected. The reticulocyte index and KT/V was also calculated. Patients were later administered 500 mg intravenous ascorbic acid three times a week for three months. At the end of study, serum ferritin, transferrin saturation, hemoglobin, reticulocyte index and KT/V were rechecked and compared with the base line values by before and after method. Results: Serum ferritin decreased significantly (median base line ferritin 480.45 ug/dl as compared to final ferritin level of 363.78 (P=0.0001), whereas there was a significant rise in hemoglobin concentration (median baseline hemoglobin 8.92 gm/dl compared to 9.88gm/dl (P=0.0001). Transferrin saturation was also significantly raised (median baseline transferrin saturation 17.35% as compared to final level of 25.12% (P= 0.0001). KT/V before and after treatment with ascorbic acid had no significant change (P =0.396). Finally, the rate of decrease in serum ferritin and increase in hemoglobin according to age and duration of dialysis was studied. The effect of ascorbic acid was found to be significantly greater in older patients and those with longer duration of dialysis (P <0.05); but there was no significant relationship between transferrin saturation increase and age or duration of dialysis. Conclusion: Intravenous ascorbic acid may partially correct functional iron deficiency, although anemia is not totally corrected.
Black holes in the varying speed of light theory
H. Shojaie,M. Farhoudi
Physics , 2002, DOI: 10.1139/P07-131
Abstract: We consider the effect of the \emph{Varying Speed of Light} theory on non-rotating black holes. We show that in any varying-$c$ theory, the Schwarzschild solution is neither static nor stationary. For a no-charged black hole, the singularity in the Schwarzschild horizon cannot be removed by coordinate transformation. Hence, no matter can enter the horizon, and the interior part of the black hole is separated from the rest of the Universe. If $\dot{c}<0$, then the size of the Schwarzschild radius increases with time. The higher value of the speed of light in the very early Universe may have caused a large reduction in the probability of the creation of the primordial black holes and their population.The same analogy is also considered for the charged black holes.
A varying-c cosmology
Hossein Shojaie,Mehrdad Farhoudi
Physics , 2004, DOI: 10.1139/P07-132
Abstract: We develop a new model for the Universe based on two key assumptions: first, the inertial energy of the Universe is a constant, and second, the total energy of a particle, the inertial plus the gravitational potential energy produced by the other mass in the Universe, is zero. This model allows the speed of light and the total mass of the Universe to vary as functions of cosmological time, where we assume the gravitational constant to be a constant. By means of these assumptions, the relations between the scale factor and the other parameters are derived. The Einstein equation, by making it compatible with varying-$c$, is used and the Friedmann equations in this model are obtained. Assuming the matter content of the Universe to be perfect fluids, the model fixes $\gamma$ to be 2/3. That is, the whole Universe always exhibits a negative pressure. Moreover, the behavior of the scale factor is the same for any value of the curvature. It is also shown that the Universe began from a big bang with zero initial mass and expands forever even with positive curvature, but it is always decelerating. At the end, solutions to some famous problems, mainly of the standard big bang model, and an explanation for the observational data about the accelerating Universe are provided.
A cosmology with variable c
Hossein Shojaie,Mehrdad Farhoudi
Physics , 2004, DOI: 10.1139/P06-070
Abstract: A new varying-$c$ cosmological model constructed using two additional assumptions, which was introduced in our previous work, is briefly reviewed and the dynamic equation of the model is derived distinctly from a semi-Newtonian approach. The results of this model, using a $\Lambda$ term and an extra energy-momentum tensor, are considered separately. It is shown that the Universe began from a hot Big Bang and expands forever with a constant deceleration parameter regardless of its curvature. Finally, the age, the radius, and the energy content of the Universe are estimated and some discussion about the type of the geometry of the Universe is provided.
A Conformally Invariant Theory of Gravitation in Metric Measure Space
Nafiseh Rahmanpour,Hossein Shojaie
Physics , 2014, DOI: 10.1007/s10714-015-1962-9
Abstract: In this manuscript, a conformally invariant theory of gravitation in the context of metric measure space is studied. The proposed action is invariant under both diffeomorphism and conformal transformations. Using the variational method, a generalization of the Einstein equation is obtained, wherein the conventional tensors are replaced by their conformally invariant counterparts, living in metric measure space. The invariance of the geometrical part of the action under a diffeomorphism leads to a generalized contracted second Bianchi identity. In metric measure space, the covariant derivative is the same as it is in the Riemannian space. Hence, in contrast to the Weyl space, the metricity and integrability are maintained. However, it is worth noting that in metric measure space the divergence of a tensor is not simply the contraction of the covariant derivative operator with the tensor that it acts on. Despite the fact that metric measure space and integrable Weyl space, are constructed based on different assumptions, it is shown that some relations in these spaces, such as the contracted second Bianchi identity, are completely similar.
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