Showing 8 results for Dabbagh
Asiyeh Mohammadian, Ehsan Kamrani, Abdul-Reza Dabbagh, Hossein Rameshi,
Volume 3, Issue 4 (2-2015)
Abstract
The effect of two salinity concentrations (35 and 40 ‰) on the daily feeding and burrowing activities of the sea cucumber, Holothuria parva was investigated, using the nutritional parameters (intestinal indices, organic materials, and the absorption efficiency). Although no significant difference between the initial and final sections of the intestinal gut of sea cucumbers in two saline conditions was found, the maximum level of intestinal indices, organic material and absorption efficiency was associated with the 40‰ salinity. The survey results displayed that sea cucumber had better feeding activity in 40‰ than 35‰ salinity.
Volume 8, Issue 1 (6-2006)
Abstract
Purpose: Since there have been some debates about using Supa brand silk, this study was designed to elucidate the possible differences between Supa and Ethicon silk in suturing rat skin.
Materials & Methods: This study was carried out on 60 female Spragne-Dawly albino rats. The animals were randomly assigned to two equal groups. In group one, 3/0 silk, Supa product, and in group two, 3/0 silk Ethicon product were used. Following general anesthesia and surgical preparation, a 5 cm midline abdominal skin incision was made and sutured by a simple interrupted pattern. Fifteen animlas of each group were sacrificed on day 6 for the histopathologic examination and the rest of the animals, on day 13 for histopathologic and biomechanical examinations. Histopathologic sections were stained by H&E and examined under the light microscope for the re-epithelialization, acanthosis, age of granulation tissue, dermatitis, hyperemia, and presence of giant cells.
Results: There was no significant differences between the two groups on day 6 and 13 (P>0.05). In the biomechanical study, the following parameters were measured from load-elongation curves: the ultimate strength, ultimate strain, yield strain, stiffness, and maximum stored energy. Regarding these factors, there was no significant differences between the groups either (P>0.05).
Conclusion: According to the results of this study and considering the price and availability, using Supa silk can be recommended with confidence and reliability.
Volume 10, Issue 1 (Spring 2020)
Abstract
Aims: In the Safavid era, due to the government’s approach to the issue of collective life, as well as attention to the issue of national unity and the society unity, certain changes can be observed in the type and manner of social activities. Therefore, it is of paramount importance to investigate the impacts of the Safavid government on the formation of urban spaces. It is considered the process of turning the bridges built during this period, such as the Allahverdi Khan and Khajoo Bridges, into the context of group activities and the role of the government in it.
Instruments & Methods: In this study, with the interpretive historical method, Safavid Travelogue to extract social activities has been studied. Then, by explaining the role of government in such activities, the causes of government agency in holding various social events are examined and the creation of Allah Verdi Khan and Khaju Bridges as a place of collective behavior of the people are then analyzed.
Findings: Since the legitimacy of the Safavid government relies on the national unity, the public territory, as the sphere of communication of society, has become the scene of national and religious events, and the government has been responsible for establishing and forming many social events. Hence, spaces such as Naqsh-e Jahan Square, Chaharbagh Street, as well as Allah Verdi Khan and Khaju Bridges have been formed during this period.
Conclusion: The urban bridges of Safavid era, i.e. Allah Verdi Khan and Khaju Bridges, have become the context of social activities of the people and the king, and instead of the mere function of a passage, they have formed a key collective space in the structure of Isfahan with their special architecture.
Volume 13, Issue 3 (July & August 2022 (Articles in English & French) 2022)
Abstract
Culture is an indispensable part of Foreign Language Education Policy (FLEP), especially in English Language Teaching (ELT). In addition, the spread of English around the globe has resulted in English users’ tendency to embed their local culture in their English communication (Kirkpatrick, 2012). However, literature remains silent on culture representation in FLEP, especially in an ideologized country like Iran. To address this issue, due to lack of an explicit FLEP in Iran, the present study analyzed the cultural schemas addressed in the seven major national policy documents of Iran, namely 20-year National Vision, Comprehensive Science Roadmap, Support for Comprehensive Science Roadmap in the Domain of Languages, Cultural Engineering Document, National Curriculum, Fundamental Reform in Education, and Islamicization of Universities. Results of content analysis using MAXQDA Software unmasked Islamic-Iranian culture as the baseline for ELT in Iran. In order to further examine the representations and implications of ‘Islamic-Iranian culture’ hidden in the documents, open coding, axial coding, and labeling along with constant comparative procedure revealed various Islamic cultural schemas. However, very few instances of Iranian cultural schemas were unveiled. The findings were discussed in light of the hidden curriculum and the power relations behind the extracted cultural schemas
Volume 16, Issue 97 (March 2020)
Abstract
Acorn tree is abundant in many parts of Iran and is usually wasted or used as animal feed. According to the numerous health effects of acorn, the aim of this research is to investigate the influence of acorn flour (substituted at levels of 0-30% with rice flour, corn flour and starch) as a mixture design on chemical, nutritional, textural and sensorial properties of gluten free biscuits for celiacs. The results showed that moisture, ash, crude fiber, carbohydrate, antioxidant capacity and total phenol of gluten free biscuits supplemented with acorn flour increased noticeably compared to control. Increasing the acorn flour decreased calorie value of gluten free biscuits. Hardness and penetration energy of samples increased with substitution of acorn flour in formulation. Sensory evaluation showed addition of acorn flour up to 20% was acceptable but total acceptance diminished at high levels of it. The obtained results signify that the application of acorn flour in gluten-free baking could be useful for fortification and increase of nutritional value.
Volume 19, Issue 123 (May 2022)
Abstract
Cake as a popular snack among different people in the community, especially children and adolescents. This high-energy product should have a porous texture, small holes with narrow border to have an acceptable marketability. Therefore, research and investment to achieve the desired quality and increase shelf life through the use of additives such as enzymes, emulsifiers, etc. seems necessary. In this regard, in order to improve the quality of cupcakes, which have a faster preparation than other cakes, the effect of two factors, glucose oxidase (0, 10, 50 and 100 ppm) and DATEM (0, 0.5 and 1%) was investigated. The results showed that the samples containing DATEM increased the moisture content, decreased the weight loss after baking and improved the volume and texture of the cake in terms of reducing firmness and increasing the cohesiveness and springiness. On the other hand, glucose oxidase addition decreased the firmness of the treatments caused by DATEM. However, the addition of glucose oxidase enzyme to the cake formulation improved the crust color parameters and sensory evaluation. So, the effect of glucose oxidase and DATEM, improved the sensory and quality characteristics of cupcake.
Volume 21, Issue 2 (5-2021)
Abstract
Reliability analysis, with considering the randomness of geometry, materials and loading variables, is a good guide for structural design in engineering. The stochastic finite element method is used to analyzing the structural systems, with regard to uncertainty in random parameters of structures. Solving the equations of stochastic finite element leads to the calculation of all possible structural responses taking into account all the random variables of the structural system. Due to the uncertainty effect on the response of structural systems, reliability analysis is essential. However, due to the limitations of the classical methods of reliability analysis, there is a need to calculate the reliability index based on the probability density function of response in structures. In this study, by combining perturbation method and change – of – variable method and without the limitation of the statistical type of random distribution of random variables, the probability density function of response is calculated. By calculating the probability density function of the static response of the structures, the probability of failure and the reliability index are obtained directly.
It is obvious that the accuracy of the result of the stochastic finite element analysis depends on the random field element meshes. For this purpose, the distributed random field is discretized over the number of elements of equal length in structural members for each random variable.
In stochastic finite element method, due to the uncertainty of the characteristics of random variables in the structure, it is necessary to define a correlation function between a random variable in different elements. The reliability index is considered as a measure of convergence by considering the scale of fluctuations and the correlation function of random variables in adjacent elements in structure. In each number of elements, the structural reliability index is calculated using the explicit probability density function of response and the structural resistance function to converge on a certain number of elements. In this study, the stochastic finite element analysis is performed in linear static mode for a simple beam and a cantilever column and the variables of geometry, materials and loading are considered randomly with real statistical distributions according to the literature review. As can be expected from the deterministic finite element method, as the number of elements increase and the meshing is smaller, the reliability index increases.Considering the lower scale of fluctuations for random variables makes the reliability index converge to a larger value. However, on a larger scale of fluctuations convergence occurs in a smaller number of elements due to the greater correlation of random variables in adjacent elements. Also, the results of the probability density function of the response with the explicit method compared to the Monte Carlo simulation method show a good match in result. The advantage of using the reliability index as a measure of convergence in meshing, the configuration of limited random components is to consider all possible structural responses instead of using the average structural response in the design of structures.
Volume 23, Issue 1 (1-2021)
Abstract
Salinity is one of the most important factors limiting plants growth and production in irrigated agriculture. The natural potential of salt tolerant plants like Kochia could be exploited through legume-containing intercropping systems as an effective strategy in mitigating the increasing salinity crisis.This experiment used split plots based on a randomized complete block design with three replications, in 2016 and 2017, at the Iranian National Salinity Research Center, Yazd, Iran. Water salinity was considered as the main factor (EC= 4, 9, and 14 dS m-1) and the cropping system was considered as subfactor with seven levels including sole cropping of Kochia (Kochia scoparia), Sesbania (Sesbania aculeate), and Guar (Cyamopsiste tragonoliba) and their possible dual and triple intercropping systems. The highest absorbed light was observed in triple intercropping and the total forage yield in triple intercropping was increased by 5% and 4.1% at 4 and 9 dS m-1 salinity, respectively, compared to that in Kochia sole cropping, while it decreased by 1.5% at 14 dS m-1.The Land Equivalent Ratio (LER) values ranged from 0.99 to 1.33. The total crude protein yield in triple intercropping was increased by 55.8 to 66.3% as compared to Kochia sole cropping. The NDF (Neutral Detergent Fiber) and ADF (Acid Detergent Fiber) were decreased by 7 to 22% in various intercropping systems. Considering increased forage quantity and quality, mainly through decreasing NDF and increasing Dry Matter Intake (DMI) levels, cultivation of Kochia within triple intercropping systems can be recommended instead of Kochia sole cropping.
