Showing 6 results for Garshasbi
Volume 1, Issue 1 (4-2014)
Abstract
H Garshasbi, B Fakheri, H Jalili, M Rahaie Jahromi, N Mahdinezhad,
Volume 9, Issue 2 (Spring 2020)
Abstract
Astaxanthin is a precious material and has many favorites for human; it is extracted from some creatures such as Haematococcus lacustris. Researchers try to maximize the production of this material. In this research effects of linoleic acid (LA), TiO2 and SiO2 Nanoparticles (NPs) were investigated on astaxanthin production, and expression of two astaxanthin metabolic pathway genes (CRTO and CRTR). The microalgae was cultured in BBM medium for 19 days autographically. In 3rd day, treatments were added to the cultures and astaxanthin measured in 3 days respectively in logarithmic and stationary phases, also RNA was extracted, Real-time PCR applied and Gene expression investigated in 11th. 30 µM LA and TiO2 NPs (40 mg L-1) induced 3.4 and 1.5 times astaxanthin production compared to the control, furthermore, CRTO and CRTR under 30 µM LA and SiO2 NPs (40 mg L-1) treatments displayed the highest gene expression. It was demonstrated that special concentration of Linoleic acid and TiO2 NPs, as inducers, could be used for astaxanthin production; also, Linoleic acid has a direct relationship with astaxanthin production and CRTO´s gene expression in the microalgae.
Volume 11, Issue 4 (1-2012)
Abstract
This paper, using an economic analysis of crime, focuses on the relationship between crime and income inequality in Iran. The results indicate that there is a significant relationship between crime and income inequality in Iran. This means that by increasing income inequality in Iran the robbery as a crime will increase as well. In addition the findings reveal that there is a direct relationship between robbery and the proportion of people in urban areas, divorce and unemployment rate, but there is a negative relationship for households’ monthly income in Iran.
Volume 17, Issue 3 (10-2014)
Abstract
Objective: Since the identification of the two highly penetrant dominantly inherited genes, BRCA1/2, in the 1990s, a number of other genes have been identified which account for approximately 25% of the genetic basis for hereditary breast cancer. At least 75% are unidentified. The goal of this study is to investigate the presence or absence of a recessive pattern of inheritance in this heterogeneous disease whose possibility has been previously discussed by researchers. Methods: In this study we used exome sequencing as the most recent approach for identification of the genetic basis of any disease. The results of exome sequencing were confirmed by Sanger sequencing. Results: Although we did not find any homozygous mutation in this family, however a heterozygous 4bp deletion that led to a frame shift mutation was identified in exon 11 of the BRCA2 gene. Also identified was a heterozygous single nucleotide polymorphism in exon 9 of the STK11 gene. Conclusion: The rs80359352 variation identified in this family is one of the frequent pathogenic mutations in the BRCA2 gene that has been reported in the BIC database. This variation has been previously observed in other ethnic populations such as Caucasians, Hispanics and the Chinese. In this study, for the first time, we report this mutation in Iranian population and its segregation in hereditary breast cancer.
Volume 19, Issue 2 (February 2019)
Abstract
Today, the effects of three-dimensional flow near the blade and wing tip in the turbomachinery industry, such as rotor helicopters, turbine, as well as wings optimization in the airline industry, for safe flight with high maneuverability, are the focus of the industry in this area. Stall can be considered an influential phenomenon in this field. In the present study, the flow separation control was investigated by a vortex generator on a wing of a radar invader UAV, including a Naca64a210 airfoil with a 5° washout angle at the wing tip and integrated wings and attached to the body with a 47° sweep angle in the subsonic flow. The turbulent flow was solved by the kw-sst method for attack angles ranging from 5-20° and speeds of 30 and 60 m/sec. The results show a good fit with numerical and experimental results so that the pressure distribution curves indicate the growth of pressure in the vortex generating regions and also the areas near the tip of the wing, which results in the flow remain in the wing surface in these areas. Therefore, by examining the pitching moment and velocity contours, it can be seen that the flow separation from the 15° angle of attack, has been delayed to 20°, and also the ability to control the separation of flow along with the growth of velocities has been achieved.
Volume 20, Issue 4 (April 2020)
Abstract
The purpose of this paper is to investigate and compare the aerodynamic coefficients obtained from the wind tunnel, numerical solution (Fluent) and engineering software (MD) for a cruise missile. The results are obtained in zero deflection of the control surfaces. For this purpose, the analysis has been carried out on the aerodynamic coefficients of the three Mach numbers: 0.6, 0.75, and 0.85, and various angles of attacks. The results of the numerical solution for calculating the coefficients of the lift, drag, normal and axial forces are respectively with a mean difference of 8.6, 1.7, 8.3 and 8.4 percent, respectively, in comparison with the wind tunnel. The results of the MD software for drag and axial forces are acceptable with an average error of 11% and 20%, respectively. Also, the existence of errors in the MD software, such as taking into account the effects of the air inlet opening only in the axial direction, shows that this method is unreliable in the present study. The results show that there is a great similarity between the behavior of the aerodynamic coefficients changes relative to the angle of attack in all three experimental and numerical methods and the MD software. Also, the pitching moment coefficient variation according to the angle of attack indicates that the trim angle varies from +6 to + 7 degrees.
