Showing 7 results for sheykhi
Volume 0, Issue 0 (Articles accepted at the time of publication 2024)
Abstract
The need to address reading skills in language teaching is important because it is related to the other three skills (listening, speaking and writing) and ultimately affects the main goal of language teaching, which is the ability to create effective communication. Now, given the presence of all mobile phones and laptops, questions arise, to what extent are electronic opportunities included in the educational content of the Russian language in Iran? Аanswering this question, as well as analyzing questionnaires with eleven main questions regarding the inclusion of new technologies, cultural topics, playing with proverbs and other issues raised in the teaching content of the reading lesson, as well as questions about whether such materials are included in the reading textbook or not, we came to the conclusion that there is an acute lack of new technologies and other things in the educational content of reading. Therefore, the authors of this study propose new ideas in the educational content of reading to solve existing problems and improve the educational process of teaching reading in Russian at the undergraduate level.
Fatemeh sheykhi, Maliheh Babakhani,
Volume 3, Issue 2 (summer 2022)
Abstract
Issue: The Covied-19 Pandemic showed the vulnerability of cities in their current state and revealed one of the strongest stimuli for the need for radical rethinking in Urban Planning. One of the theoretical approaches that has been considered by many cities in developed countries is the 15-Minute City Approach. density, proximity to complementary and consistent functions are its basic principles.
Aims: The purpose of this article is to study the concept of a 15-Minute City, identify the components of achieving it and feasibility study of the adaptation this approach in Iranian cities as a post-pandemic urban planning approach. As a case study, Mehrshahr, Karaj has been studied.
Methodology: It is applied research that is applied descriptive-analytical method. In the analysis of access to index uses, the analysis of the pedestrian network in GIS software was used and using SWOT and QSPM techniques to determine and prioritize strategies for future development. The study area in the direction of the city was 15 Minutes.
Findings: The lack of functional diversity (vacuum in educational, religious and medical uses) and the lack of path continuity and very poor flooring for pedestrians are important issues in this area to adapt to the 15-Minute City approach.
Conclusion: Ensuring the safety and security of pedestrians and cyclists, providing infrastructure and services required for pedestrians and cyclists, applying the principles of mixed and multiple land use and balanced distribution of services are the most important strategies proposed.
Volume 8, Issue 2 (Spring 2019)
Abstract
Considering the high nutritional value of fish meat and low consumption of fish in Iran, it is always advisable to consume this meat and its products. Cyprinus carpio is one of the most important and widely used species among fish. In the present study, Cyprinus carpio meat with beef meat (red meat) was used in the production of different samples of non-fermented sausages in ratios of 5, 15, 25, 35, 50, 65, 75, 85, and 95% in combination and on the day after production, physicochemical tests such as moisture, protein, fat, and ash content, and organoleptic evaluation such as color, aroma, flavor, consistency, and overall acceptance carried out on the samples. The results showed that by increasing the proportion of fish meat in the formulation, protein content increased and fat, ash, and moisture content decreased. The proportions of 35 to 65% of fish meat received the highest score, while, the proportions of 5 to 35% and 5 to 50% showed the highest scores of aroma and flavor, respectively. Treatments with a ratio of 65 to 95% of fish meat had the highest score of consistency. The overall acceptance of treatments showed that the ratios of 35 to 65% of fish meat showed the highest scores.
Volume 9, Issue 1 (Winter 2018)
Abstract
Aims: Identifying the structure and function of alpha-Synuclein protein can lead to the development of appropriate treatments for Parkinson disease. The aim of the current study was to investigate DNA cloning and the expression of alpha-Synuclein protein in E. coli.
Materials and Methods: In this experimental study, the sequence of encoding alpha-Synuclein in pRK172 recombinant plasmid was amplified by Polymerase Chain Reaction (PCR), using best primers. The synthesized DNA was, then, digested by restriction enzymes and cloned into pET28a and recombinant plasmid was transferred into the expression strain of E. coli (BL21) by Calcium Chloride method. The expression of alpha-Synuclein gene was induced by Isopropyl-Beta-D-Thiogalactoside (IPTG) and the expression of alpha-Synuclein was investigated by SDS polyacrylamide gel electrophoresis (SDS-PAGE) method. Sequencing was done, using the ClustalW algorithm by the BioEdit 5.0.9 program.
Findings: In products of DNA enzymatic digestive reactions and pET28a plasmid with restriction enzymes, the size of the fragments indicated the correctness of the enzymatic reactions. The synthesized DNA and pET28a plasmid were 407 and 5369 nucleotides, respectively. The translation of the sequence of the cloned fragment revealed a 100% similarity to the human alpha-Synuclein protein. In expressing the recombinant protein in comparison with negative control samples, adding IPTG increased the expression of alpha-Synuclein protein in all samples, especially 2 hours after induction. Most of alpha-Synuclein expressed from the pET28a-alpha-Synuclein plasmid accumulated in the bacteria as incorporated objects.
Conclusion: The alpha-Synuclein protein is cloned into the pET28a plasmid and formation of the objects incorporated by alpha-Synuclein is confirmed by the expression of the pET28a-alpha-Synuclein system and paves the way for producing this protein in high scale.
Volume 11, Issue 4 (fall 2020)
Abstract
Total-Internal-Reflection Fluorescence Microscopy (TIRFM) is a useful tool to visualize and record the phenomena that happens below 100 nm thickness of the sample surface. This unique property of TIRFM help to perform a "qualitative" study of cytoskeleton near the cell-substrate contact. Here, distribution of actin filaments at cell-substrate interface was imaged by a TIRFM set up. Then, staining the actins cytoskeleton of the human melanoma cell and implementing the prism-based total-internal-reflection fluorescence microscope. A method to "quantify" distribution of fluorophores at cell-substrate contact is proposed.
Volume 17, Issue 10 (1-2018)
Abstract
In this paper the modeling of combined heat and power (CHP) system driven by Stirling engine has been discussed. The system consists of one beta type Stirling engine as the prime mover, heat recovery system, power generator and the auxiliary boiler. The analysis of the Stirling engine is a non-ideal adiabatic analysis. To increase the accuracy of modeling, the frictional and thermal losses of Stirling engine are considered in comparison of other previous studies and the non-ideal adiabatic analysis is performed using a developed numerical code in MATLAB software. For model validation, the operational and geometrical specification of the GPU-3 Stirling engine was used and the results were compared with experimental results and other previous models. Then, one beta-type Stirling engine was proposed as prime mover in cogeneration system for building applications. The use of the cogeneration systems in building applications becomes more common, which system from the perspective of the fuel consumption and pollution emission, have a significant advantage in comparison with the other conventional systems. For this purpose, the effects of engine frequency, regenerator length, and heat source temperature on fuel consumption and pollution emission of system were examined and proper engine design parameters were selected. Finally, the electric power and thermal power were achieved 11263 W and 21653 W, respectively, with reduction in fuel consumption and pollution emission of 37% and 42%, respectively.
Volume 18, Issue 3 (5-2018)
Abstract
The collision of droplets on solid surfaces is widely used in oil and gas industry, surface painting, hot surface cooling and spraying of agricultural products. In the present study, the spreading factor of Boger non-Newtonian fluid is experimentally investigated on the dry solid surface such as an acrylic (Plexiglas) and stainless steel sheet and is compared with Newtonian droplets (water and glycerin). The plates of Plexiglas and stainless steel both have a hydrophilic surface. In this research, the Newtonian and non-Newtonian fluids droplets collapse at two heights of 27 and 47 cm from the dry solid surface and are examined in the range of Weber numbers 245≤We≤"538" . The purpose of this study is to investigate the effects of contact velocity on the spreading factor of non-Newtonian and Newtonian droplets during the collision. The results of this study show that with the growth of Weber number (increasing contact velocity), the maximum value and velocity of spreading and receding are increased for the Newtonian or non-Newtonian droplets. Also, with increasing the viscosity of droplets, the value and velocity of spreading and receding are decreased for the Newtonian and non-Newtonian droplets. By increasing the velocity of collision on the Plexiglasas surface (raising the Weber number) up to 32%, the maximum value of droplets spreading is increased 22, 31 and 20 percentage respectively for the fluids of Boger, water and glycerin.
