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Search Results: 1 - 10 of 2062 matches for " Mostafa Heidari "
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Variation in Seed Germination, Seedling Growth, Nucleic Acid and Biochemical Component in Canola (Brassica nupus L.) Under Salinity Stress
Mostafa Heidari
Asian Journal of Plant Sciences , 2009,
Abstract: A laboratorial study was carried out to investigate the effect of NaCl on seed germination, seedling growth, proline concentration and deoxyribonuclease (DNase I1) in canola. Five canola genotypes (Hyola308, Hyola401, Hyola60, Optlon50 and RGS003), were grown in petri dishes containing S1 = 0, S2 = 100, S3 = 200 and S4 = 300 mM NaCl in controlled environment. Results indicated that increased salinity caused a significant reduction in germination. Increase salt concentration also affected the early seedling growth and proline concentration in root and shoot tissues. Among the genotypes, Hyola60 appeared to be more tolerant at germination stage and accumulate the highest proline in the root and shoot as a result of salt stress. Among the genotypes, RGS003 had the highest the activity of DNase II in all of salinity treatments but more sensitive at 300 mM NaCl in germination stage then others.
Antioxidant Activity and Osmolyte Concentration of Sorghum (Sorghum bicolor) and Wheat (Triticum aestivum) Genotypes under Salinity Stress
Mostafa Heidari
Asian Journal of Plant Sciences , 2009,
Abstract: Seedling of two sorghum genotypes (Payam and Sistan) and four wheat genotypes (Bolani, Hirman, Star and Toss) were grown in Hoagland nutrient solution containing 0, 100 and 200 mM NaCl in controlled environment. Antioxidant activities like catalase (CAT), ascobrate peroxidase (APX) and guaiacol peroxidase (GPX) and osmolyte concentrations, proline and soluble carbohydrates were determined in the leaves 20 days after induction of salinity stress. Results showed that the activity of APX, GPX and CAT increased in both sorghum genotypes. Wheat genotypes showed significant differences during the experimental period. By increasing NaCl levels from 0 to 200 mM the activity of APX and GPX decreased, but the activity of CAT increased in all wheat genotypes. At the 100 mM NaCl, the CAT activity in wheat genotypes was higher compared with that in 200 mM NaCl. The increase in salinity stress increased total soluble carbohydrates and proline both in wheat and sorghum genotypes. Results in this study showed sorghum genotype displayed better osmotic adjustment and antioxidant compounds under salt stress and the efficiency of Sistan was better than Payam. Contrarily in wheat, osmotic adjustment (carbohydrate and proline accumulation) was much more effective than antioxidant enzyme activity.
Evaluation of Prophylactic Antibiotic Prescription in Post-Operative Infection in Patients Undergone Inguinal Herniorraphy Surgery with Prolene Mesh: A Randomized Double Blind Study
Mostafa Hosseini,Afshin Heidari
Surgery Journal , 2012, DOI: 10.3923/sjour.2011.21.25
Abstract: Inguinal hernia is one of the most common surgical problems in general population and herniorraphy is one of the most common surgical procedures done in general surgery. In recent years, many progresses have been achieved in this field as using prosthetic materials to reduce the recurrence. Although, it has some disadvantages such as adhesions and infections. The goal of this study is to evaluate the effect of prophylactic antibiotic in reduction of post operative infection in these patients. This is an interventional double blind randomized trial on 212 patients undergone Lichtenstein Inguinal Herniorraphy. A total of 100 cases received prophylactic antibiotic and 112 patients did not receive any antibiotic. They were all examined by another surgeon on 3, 7, 14, 30 and 60th day post operative and the results were put in an information sheet. We used SPSS software to analyze the data and Chi-square (χ2) and exact fisher test were used to evaluate the results. Mean age of patients was 51.1 4.6. Range was 20-81 years; 91.5% were male, 8.5% were female. About 5.2% had Diabetes Mellitus (DM), 7.1% had HTN and 6.6% had previous IHD. About 95.5% had simple inguinal hernia, 2.4% had femoral hernia, 2.3% had incarcerated inguinal hernia, 53.3% right side, 42% left side and 4.7% were bilateral hernia. The incidence of infection in antibiotic group was 2% and in group without prophylactic AB was 2.7% which was not stastically significant (p = 0.4). As there is no significant difference between two groups, prophylactic AB has no effect on post operative infection thus, according to high cost of routine antibiotic prescription and possible complications such as resistance and side effects and reactions of these drugs, it is justified to limit the antibiotic to therapeutic purposes and those who have risk factors for severe infections.
Salinity Effects on Compatible Solutes, Antioxidants Enzymes and Ion Content in Three Wheat Cultivars
Mostafa Heidari,Fatmeh Mesri
Pakistan Journal of Biological Sciences , 2008,
Abstract: In order to study effects of different salinity levels on antioxidant enzyme activities, catalase (CAT), ascorbate peroxidase (APX) and guaiacol peroxidase (GPX) associated with compatible solutes, proline and carbohydrate and mineral nutrient content in shoots, sodium and potassium, in three wheat cultivars an experiment was conducted as completely randomized 3x4 factorial design with three replicates in a greenhouse. Three wheat cultivars (Pishtaz, Kavir and Hamon), that differ in their salt tolerances, were grown in four different salinity levels (S0 = control, S1 = 100, S2 = 200 and S3 = 300 mM NaCl). Twenty days after wheat cultivars subjected to salt stress, data showed salinity stress induced increase in the antioxidant enzyme activities. Among the cultivars, salinity stress decreased leaf-APX but increased the activities of leaf-GPX in Pishtaz cultivar. Our results showed a positive correlation between praline accumulation and Leaf-APX (r2 = 0.56), Leaf-GPX (r2 = 0.63) and Leaf-CAT (r2 = 0.73). In these cultivars, in their shoots Na+ showed an increase in concentration with salinity that approximately matches a decrease in K+ concentration. It seems that Na+ concentrations in the shoot may have had a more significant effect on plant antioxidant enzyme activities and compatible solutes such as proline and carbohydrates. These results indicated which in wheat under salinity stress antioxidant enzymes and compatible solutes help to plant adaptation. In this study we found a positive correlation between Na+ concentration in the shoots and the antioxidant enzyme activities and compatible solutes in the leaves.
A survey on decentralized steel industries
Mostafa Jafari,Naser Heidari
Management Science Letters , 2011,
Abstract: During the past three decades there have been tremendous efforts on building steel factories on economic scales. The primary question is to find an economic scale for such plants which could also meet domestic demand. In this paper, we perform an empirical survey to find out whether building small steel factories are more suitable or setting up giant steel industries to meet regional demands. The results indicate that in many countries, building small steel plants based on the recent advances of technologies not only reduces the total cost of steel production but also it could significantly reduce the unnecessary transportation cost, providing cheaper labor, etc. This would lead to better competition which would increase the productivity.
Prostate Cancer’s Molecular Imaging by Targeting Based Nanoparticles: An Overview  [PDF]
Hossein Heidari, Alireza Salehi Fordoei, Mostafa Saffary, Mehdi Shafiee Ardestani
Health (Health) , 2015, DOI: 10.4236/health.2015.75069
Abstract: Today nanoparticles based drug delivery or imaging agents are extremely being investigated as a very powerful tool in early diagnostics or treatment of different kinds of cancers including prostate malignancies. Among the diverse developing nanomaterials, biocompatible biodegradable dendrimers and chitosan or PLGA (Poly Lactic-co-Glycolic Acid) derivatives are more considered due to their safer profiles. As a result, finding novel prostate imaging agents based on nano sized structures would be of high global interest which will be further discussed in this review.
Effect of Municipal Wastewater with Manure and Chemical Fertilizer on Grain Yield and Yield Components in Corn KoSc 704
Yaser Esmailiyan,Mostafa Heidari,Ahmad Ghanbari
Journal of Agronomy , 2008,
Abstract: In order to study effects of wastewater with two kind of fertilizers (manure and chemical fertilizer) on grain yield and yield components in corn (KoSc 704) a field experimental was conducted at the university of Zabol in Iran during 2007 growing season. The experiment was conducted as split block design with three replications. The treatments were comprised of two levels of irrigation water (W1 = well water and W2 = wasetewater) in main plot and five levels of fertilizer (F1 = control, F2 = manure: 30 ton ha–1, F3 = manure: 15 ton ha–1, F4 = NPK: 350, 200 and 100 kg ha–1 and F5 = NPK: 175, 100 and 50 kg ha–1) in sub plot. Results showed irrigation with wastewater significantly increased grain yield of corn than usual water. Also, wastewater had positive significantly influence on grain yield and all yield components, but the most effective of wastewater on yield components was on the 1000-seed weight. Among the fertilizer, F4 in all situations had the most effective on the grain yield and yield components and increased them.
Targeted Fluoromagnetic Nanoparticles for Imaging of Breast Cancer MCF-7 Cells
Mostafa Heidari Majd,Jaleh Barar,Davoud Asgari,Hadi Valizadeh
Advanced Pharmaceutical Bulletin , 2013, DOI: 10.5681/apb.2013.031
Abstract: Purpose: To achieve simultaneous imaging and therapy potentials, targeted fluoromagnetic nanoparticles were synthesized and examined in human breast cancer MCF-7 cells. Methods: Fe3O4 nanoparticles (NPs) were synthesized through thermal decomposition of Fe(acac)3. Then, magnetic nanoparticles (MNPs) modified by dopamine-poly ethylene glycol (PEG)-NH2; finally, half equivalent fluorescein isothiocyanate (FITC) and half equivalent folic acid were conjugated to one equivalent of it. The presence of Fe3O4-DPA-PEG-FA/FITC in the folate receptor (FR) positive MCF-7 cells was determined via fluorescent microscopy to monitor the cellular interaction of MNPs. Results: FT-IR spectra of final compound confirmed existence of fluorescein on folic acid grafted MNPs. The Fe3O4-DPA-PEG-FA/FITC NPs, which displayed a size rang about 30-35 nm using scanning electron microscopy (SEM) and transmission electron microscopy (TEM), were able to actively recognize the FR-positive MCF-7 cells, but not the FR-negative A549 cells. Conclusion: The uniform nano-sized Fe3O4-DPA-PEG-FA/FITC NPs displayed great potential as theranostics and can be used for targeted imaging of various tumors that overexpress FR.
Appraisal of fibroblast viability in different concentration of glucose as mimicry diabetic condition
Maryam Ebrahimi,Mostafa Rezaei Tavirani,Saeed Heidari Keshel,Reza Raeisossadati
Journal of Paramedical Sciences , 2011,
Abstract: Diabetes mellitus is a common name for a group of diseases of a much diversified etiopathogenesis, characterized by chronically increased concentration of blood glucose. Diabetes results from alterations of various genes, each having a partial and additive effect. The inheritance pattern is thus complex, and environmental factors play an important role in favoring or delaying the expression of the disease. Diabetes can cause devastating complications, including cardiovascular diseases, kidney failure, and blindness, leg and foot amputations, delay in wound healing, which often result in disability and death. Fibroblast cells play a critical role in wound healing. They are the most common cells of connective tissue in animals. Tissue damage stimulates fibrocystic and induces the mitosis of fibroblasts. Wound healing processes in diabetic patients are so longer and sometimes cause to cut damaged tissue.In this study Fibroblasts were isolated from foreskin and cultured as primary cell culture in different concentrations of glucose (8.8 mmol/l, 13.13 mmol/l, 18.31 mmol/l, 27.7 mmol/l, 37.18 mmol/l, 47.17 mmol/l, 83.24 mmol/l, 124.8 mmol/l and 166.4 mmol/l) for 48h incubation time. Traditionally, the determination of cell growth is done by counting viable cells after staining witha vital dye. Among several approaches have been used in the past, The MTT method of cell determination is most invaluable to cultures which are prepared in multiwall plates. This assay is a sensitive, quantitative and reliable colorimetric assay that measures viability, proliferation and activation of cells. The results of this preliminary study suggest that altered glucose concentrations may affect fibroblast behavior in ways that are important for tissue repair and wound healing. The cells had low level of confluency and viability and in high concentration fibroblast had very low cell division.
Mechanical Properties of Chitosan-Starch Composite Filled Hydroxyapatite Micro- and Nanopowders
Jafar Ai,Mostafa Rezaei-Tavirani,Esmaeil Biazar,Saeed Heidari K,Rahim Jahandideh
Journal of Nanomaterials , 2011, DOI: 10.1155/2011/391596
Abstract: Hydroxyapatite is a biocompatible ceramic and reinforcing material for bone implantations. In this study, Starch-chitosan hydrogel was produced using the oxidation of starch solution and subsequently cross-linked with chitosan via reductive alkylation method (weight ratio (starch/chitosan): 0.38). The hydroxyapatite micropowders and nanopowders synthesized by sol-gel method (10, 20, 30, 40 %W) were composited to hydrogels and were investigated by mechanical analysis. The results of SEM images and Zetasizer experiments for synthesized nanopowders showed an average size of 100?nm. The nanoparticles distributed as uniform in the chitosan-starch film. The tensile modulus increased for composites containing hydroxyapatite nano-(size particle: 100?nanometer) powders than composites containing micro-(size particle: 100?micrometer) powders. The swelling percentage decreased for samples containing hydroxyapatite nanopowder than the micropowders. These nanocomposites could be applied for hard-tissue engineering. 1. Introduction Hydroxyapatite (HA; Ca10(PO4)6(OH)2) is a type of calcium phosphate that has extensive application in the healing of bones and teeth, due to its biocompatibility and similar composition to that of natural bone. Biodegradability and nontoxicity, especially mechanical properties, are important factors for scaffolds in hard-tissue engineering [1–5]. Chitosan has been proved and regarded as biodegradable noncytotoxic material which has some interesting biological activities [6–8]. Some of the recent studies, however, indicate that chitosan, with higher than 60% deacetylation degree, shows little amount of degradation and is not absorbed easily in-vivo [8]. Starch, an biodegradable biopolymer, is getting increasingly more attractive because of its renewability, biodegradability, and low cost. Starch-based polymers have recently been proposed as having great potential for applications in biomedical field as implant materials, drug delivery systems, and tissue engineering scaffolds [9, 10]. In order to use it in temporary medical applications, such as temporary hard-tissue replacement, bone fracture fixation, and bone tissue scaffold, blends of starch with different materials such as ethylene-vinyl alcohol copolymer (SEVA) and poly (caprolactone) (SPCL) have been proposed [11–13]. Over the past 30 years, synthetic hydroxyl apatite and glass/ceramics have been developed and used in the medical field [14]. It is well known that when these bioactive ceramics are implanted in the body, spontaneously bond to living bone via an apatite layer deposited
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