Showing 12 results for Saedi
Volume 1, Issue 2 (Summer 2020)
Abstract
There have been numerous studies conducted in urban studies dealing with the issue of pedestrians’ collective life. However, there is a dramatic scarcity of the research on bicycling, most of which have focused on the subjects of traffic engineering, urban planning, policies and health. Few studies have taken the subjects of social sciences and urban anthropology. In addition, the majority of research on cycling have produced a largely quantitative methodological tool kit. The studies which are based on quantitative and positivistic approaches, have exclusively dealt with the contextual-spatial responses of the cyclists, including the design of the routes, the physical features, and so forth. The study of the lived experience of the cyclists in cities has been, therefore, essentially neglected. The present study, as a qualitative research, relies on auto-ethnography, to investigate the lived experience of the author, in the city of Tehran (as a car-dominated city). The current research paper illustrates the lived experience of cycling in Tehran under six primary topics (Represented Space versus Spatial Representations, Personalized City versus External Urban Network; Roaming on the Saddle; I Pedal, Therefore I Am; Triangle Phenomenon; Power Space and Spatial Resistances). The research concepts are elicited from my auto-ethnographical essays by implementing four existential life worlds: lived space (spatiality), lived body (corporeality), lived time (temporality), and lived relations (relationally).
Volume 4, Issue 2 (Spring 2018)
Abstract
Aims: Nowadays, treatment of bacterial infections is one of the most important challenges in the world. Medicinal plants offer a great hope to overcome these needs because of their chemical diversity and their significant role in the drug development. The aim of this study was to evaluate the in vitro antibacterial activity of the thyme (Thymus vulgaris) essential oil against Mycobacterium tuberculosis.
Materials and Methods: In this experimental study, thyme herb plants were collected and thyme essential oil was extracted. The Minimum Inhibitory Concentration (MICs) tests were performed to determine the antimicrobial activity of Thymus plant against the first (Isoniazid, Rifampicin, Ethambutol) and second (Cycloserine, Streptomycin, Kanamycin) drug antibiotics of mycobacterium. Data were analyzed by SPSS 21 software, using one-way ANOVA test.
Findings: The MICs for Isoniazid, Ethambutol, Streptomycin and Cycloserine were less than 10µg/ml and the MIC values for Rifampicin and Kanamycin were 40µg/ml. The limits of minimal inhibitory concentration of essential oil was between 0.5-40µg/ml (p<0.05).
Conclusion: Thyme essential oil has antibacterial activity against Mycobacterium tuberclusis.
Volume 7, Issue 1 (2-2000)
Abstract
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Volume 7, Issue 1 (3-2018)
Abstract
Acute toxicity of the field recommended concentration of three conventional insecticides (Diazinon, Malathion and Chlorpyrifos) and mineral oil was evaluated on 3rd and 4th instar larvae and adults of Cryptolaemus montrouzieri Mulsant. The mortalities caused by the insecticides and mineral oil were significantly different. Diazinon and Malathion with 100% mortality showed the highest toxicity to the different stages of the ladybird. Chlorpyrifos and mineral oil caused less than 30% mortality, while mineral oil had the lowest harmful effect on this predator. Based on LC50 and LC90 values 24h after treatment, the male and female adults of C. montrouzieri were more susceptible to Diazinon (701 and 635; 1257 and 1194ppm) than to Chlorpyrifos (4238 and 4316, 5683 and 5480 ppm). Based on International Organization of Biological Control (IOBC) classification, Chlorpyrifos and mineral oil were classified as category 1 (harmless) and Diazinon and Malathion were placed in category 4 (harmful).
Volume 7, Issue 25 (Spring 2014)
Abstract
Most Iran-Iraq War novels are considered to be an ideological device for the “Holy-Defense” genre; however, in the recent years,a number of distinct polyphonic novelshave emerged, one of the most important of which is Ahmedzadeh’s Chess with the Doomsday Machine. Bakhtin’s distinction distinguishes between monologue and carnivalesque novels. Polyphonic novels, like carnivals, act as a centrifugal force supporting nonofficial dimensions of the society. Images of food and carnal elements, cursing, reciprocal relation between characters and settings according to the double aspects of carnival, and rebellion against a victorious closure by postponing the narrator’sactions distorts the linearity of narration common in in the Holy-Defense novels.
Volume 8, Issue 1 (4-2017)
Abstract
Abstract
Aims: Basillus anthrasis is the causative agent of anthrax that can form the highly resilient spore. Because of this attribute, it is suitable to use as biological weapon and considered as a dangerous biological bioterrorism agent. The aim of this study is to predict an inhibitor of anthrax toxin receptor on human cells by using bioinformatics tools.
Methods: The interaction between anthrax toxin receptor and 57 herbal compounds were studied by using Swissdock webserver. Then the amino acids involved in the strong interactions, were obtained by UCSF Chimera software.
Results: According to the results of this study, among the investigated compounds, 10 compounds include: Asarone, Bisabolol, Chlorogenic acid, Geraniol, Harmine, Harmaline, Sulforaphane, Fluphenazine, L-catechin and D-catechin are capable of inhibiting anthrax toxin receptor. That sulforaphane is probably the most effective inhibitor.
Conclusion: Results derived from processed analyses offer laboratory researches based on these compounds to produce an effective drug against anthrax toxin.
Volume 10, Issue 1 (Winter 2022)
Abstract
Aim: Fire is one of the most important ecological disturbances in rangelands which change the characteristics of vegetation and soil. Up to now few studies have been conducted to study the short-term effects of fire on soil and vegetation in semi-arid shrubland. The positive or negative effects of fire on soil and vegetation of rangeland have been investigated in this research.
Materials and Methods: Soil pH, electrical conductivity (EC), total potassium (K), calcium (Ca), sodium (Na), and magnesium (Mg) content were selected as soil attributes and vegetation richness, diversity and density (percent
ground cover) as vegetation properties. Vegetation and soil sampling was performed based on systematic randomized method along 3 transects (The length of transects in the control and burnt area was 100 m and the distance between each plots was 10 m). Information about vegetation traits (production, density, diversity, richness and evenness) were recorded in 1 m2 plots. Soil samples were taken at two depths of 0-15 and 15-30 cm by auger.
Findings: Compared to unburnt rangeland, the percentage of vegetation (16.30 %), production (20.47 Kg ha-1) and density of vegetation (6.74 %) in burnt region have been decreased significantly (P<0.05).
Conclusion: The results of the present study had shown a significant decrease in species diversity and richness in burnt rangeland. There were not any positive effects of fire on soil or vegetation cover in studied area.
Volume 13, Issue 1 (Winter 2025)
Abstract
Aim: A healthy lifestyle is a crucial modifiable risk factor in breast cancer prevention. This study aimed to identify predictors of health-promoting behaviors based on the self-regulation model among breast cancer patients in northern Iran.
Instrument & Methods: A cross-sectional analytical study was conducted in 2021 with 260 breast cancer patients. The questionnaire assessed demographic characteristics, disease status, psychosocial factors related to the self-regulation model, health-promoting behaviors, and patients' attitudes toward their health. Data were analyzed using correlation coefficients and multivariate linear regression.
Findings: The average age of participants was 52.6 years (± 10.6). A direct correlation was found between perceived treatment effectiveness and all domains of health-promoting behaviors. The multivariate regression model indicated that perceived treatment effectiveness significantly predicts health-promoting behaviors, including a healthy diet (β = 0.20, p = 0.016), vitamin consumption (β = 0.21, p = 0.002), and performing mammography (β = -0.26, p = 0.001).
Conclusion: These findings indicate that perceived treatment effectiveness is closely linked to enhanced health-promoting behaviors, irrespective of treatment status. Incorporating training in self-regulation processes within palliative care may foster healthier lifestyles among patients. This study underscores the importance of culturally sensitive health interventions in breast cancer management.
Volume 16, Issue 86 (4-2019)
Abstract
This study was conducted to investigate the content of phenolic compound and radical scavenging capacity (IC50) of chevil as a replacement for synthetic antioxidants. The extract of chevil leaves powder was obtained by maceration (12 h) and microwave (60 s) with ethanol or water (100: 0, 75: 25 , 50:50) and the amount of total phenolics and flavonoids was measured by spectrophotometry and antioxidant activity was measured by scavenging free radical 2,2-diphenyl -1- picryl hydrazine (DPPH). Data were analyzed by SPSS versiov 24 as well as variance analysis. The results showed that there was a significant difference between the extracts obtained by two used solvents ethanol and water (p<0.01). The extracts obtained by microwave showed the highest flavonoids content (0/75±0.008 mg Eq. Rutin/g dry sample) and the highest radical scavenging activity (1/04 ± 0/1) at ethanol to water ratio of 0:100 % as comared to maceration method. In contrast, the highest total phenol content (TPC) (3/665±0.09 mg Eq. gallic acid / g dry sample) was obtained by maceration at ethanol to water ratio of 0: 100%. For both methods, the rate of extraction was affected by solvents ratio and water was more effective than ethanol.
Volume 16, Issue 93 (November 2019)
Abstract
Pineapple due to nutrients is a desirable option to improve the nutritional value of supplemented products. In this study, due to the increasing importance of production and use of enriched baking products. The effect of size of parts (0.5, 1 and 1.5 cm cubic meters) and the percentage of fruits (10, 12.5 and 15 percent) on the quality of muffin properties were investigated. For this purpose, a completely randomized design was used and the mean of Duncan test was used at 5% level. Increasing the size of parts and percentage of fruit in muffin formulation resulted in decreased specific volume, water activity, pH and fiber and moisture content in the samples compared to the control sample. There was no significant difference between the values of skin color components with control. According to the results of this study, the treatment containing 15% of pineapple fruits with 0.5 cm cubic meters was introduced as the best treatment and had the highest overall acceptance level for consumers. According to the results, the use of pineapple fruit has been effective in improving the physico-chemical and sensory properties of the muffin samples. Sensory evaluation also showed that adding different amounts of pineapple fruit to muffin formulations significantly reduced the texture index, flavor, color and overall acceptance by increasing the replacement percentage of the produced product compared to the control sample.
H. Aghaie, M. Saghafian, D. Saedi,
Volume 19, Issue 12 (December 2019)
Abstract
Today, the use of ultrasonic waves is expanding to the separation of particles or cells. One of the effective factors in the separating is cell deformation caused by ultrasonic waves. The most popular models used for deformation are the elastic and viscoelastic models. In this research, the cell has been modeled in a fluid environment under the influence of ultrasonic waves and deformations has been obtained. For this purpose, the Helmholtz equation that is a combine of the disturbance equations of sound waves and Navier-Stokes equation is solved and acoustic pressure is obtained. This pressure is then applied to the cell as deformation agent and the deformation is obtained using fluid-solid interactions modeling. Initially, deformation of the cell with elastic properties has been presented and validation has been conducted using comparison with the previous experimental researches. Finally, the deformation for the viscoelastic cell, which has so far not been used for deformation modeling in the acoustic field, has been obtained and presented. The results show that the viscoelastic model has the most compatibility with the experiment results. Also, the effect of frequency on the aspect ratio has been investigated. As the frequency ranges increased from 2 to 8 MHz, the aspect ratio is increased to 0.3.
Volume 21, Issue 3 (12-2017)
Abstract
Increasing expansion of competition among commercial companies and variations relate to increase or decrease in the market share, brings a scientific look at all marketing functions forward. One of the most important marketing activities is attention to why and how customers' behaviors are created. The present research's objective is to determine effects of the brand's social power base on the purchase behavior mediated by level of consumerProduct involvement. Statistical society of the research includes costumers of Iran-Khodro company agencies in khorramabad city. Due to infinite volume of statistical population, a sample of 384 subjects were chosen using Cochran formula and available sampling method. validity and reliability of the questionnaire were confirmed using content-creditability method and cronbach-alfa respectively. To examine and test hypotheses, the structural equation modeling approach and Amos software were used. The research finding indicate that at %5 error level , the bases of the brand's social power have a significant positive effect on the purchase behavior and cognitive engagements of the consumers product. In addition, it can be stated that at the error level of %5, the product's cognitive engagement has a mediator role in the effects of the brand's social power bases on the purchase behavior.
