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Articles by A. Abbasi
Total Records ( 5 ) for A. Abbasi
  A. Abbasi , A. Tobeh , M. Shiri-e-Janagrad , Sh. Jamaati-e-Somarin , M. Hassanzadeh and S. Hokmalipour
  In order to evaluate responses of two potato cultivars to different nitrogen levels, a split-plot design based on randomized complete block design with four replications was conducted at agricultural research field, Ardabil, Iran in 2008. Main-plots included nitrogen levels: 0, 80, 160 and 200 kg ha-1 nitrogen and sub-plots were assigned to Agria and Satina cultivars. Measured traits were mean tuber weight, tuber yield and number of tuber were sorted according to size and harvest index. Results showed that cultivar Agria in all traits was superior to Satina except for the number of small size tubers. The highest mean tuber weight and tuber yield was observed using 160 and 200 kg ha-1 nitrogen. With increasing nitrogen levels, number of tubers larger than 55 mm was increased. The rate of 160 kg ha-1 nitrogen resulted in the tubers ranged between 28 and 55 mm. Agria cultivar gained more leaf biomass during the season than Satina cultivar 160 kg ha-1, N produced the highest and control, produced the lowest biomass, respectively. The highest leaf biomass was obtained 83 DAP and finally decreased because of senescence and falling of leaves. Impact of nitrogen was not significant on small size tubers. Also, cultivar Agria had the highest values for most traits in treatment of 160 kg ha-1 nitrogen.
  M. Shiri-e-Janagrad , A. Tobeh , S. Hokmalipour , Sh. Jamaati-e-Somarin , A. Abbasi and K. Shahbazi
  A field experiment comparing different drip irrigation regimes and plant arrangements on potato yield and its component, leaf, stem and total dry matters, harvest index and water-use efficiency was carried out in a clay soil. This study was carried out on the experimental Farm of Ardebil Agriculture Research Station in 2006. The experiment included three treatments for different drip irrigation regimes: I1 (full irrigation), I2 (80% of full irrigation), I3 (60% of full irrigation) and three treatments for plant arrangements: conventional cultivation (P1), two rows 35 (P2) and 45 (P3) cm apart on a wide bed 150 cm. Results indicate that both drip irrigation regimes and plant arrangements didn’t influence the harvest index. In all varieties, I1, I2 and I3 produced the lowest amounts, respectively. Plant arrangement hadn’t significant impress on tuber yield, numbers and average weight of tubers. P3 and P2 treatments produced maximum and minimum values in more characteristics. The yield of tuber, leaf, stem, total and harvest index indicated increasing trend during the harvest times and only the stem and leaf yield decreased at the two final harvests. In most variables interaction effect of the (I1xP3) generated. Accumulative amounts of reference and 100, 80 and 60% crop evapo-transpiration (EP) were 782.2, 627.6, 502.0 and 376.5, respectively. Water Use Efficiency (WUE) with increase water supply improved. Treatment of I1xP3 had the highest WUE. Its values during growth period increased and maximum WUE obtained at 109 Day after Planting (DAP).
  A. Abbasi , B. Vosoughi Vahdat and Gh. Ebrahimi Fakhim
  The present study provides an inverse solution and analysis on a new approach for Electrical Impedance Tomography (EIT) process as Block Method in EIT. In this method, it is assumed that all of the particles of each block have the same electrical properties (electrical conductivities). This technique is used to enhance image resolution and also to improve reconstruction algorithm. Although this method has been developed for 3D objects, in this study it is assumed that the subject has a (two-dimensional) rectangular shape and is made of fixed size blocks. By considering the previous conditions and computing relationship among currents, voltages and electrical impedances of blocks, the required equations to solve the problem is generated. Computer simulations show that employing the block method in reconstruction algorithm results in more accurate identification.
  M. Shiri-e-Janagard , A. Tobeh , A. Abbasi , Sh. Jamaati-e-Somarin , M. Hassanzadeh and R. Zabihi-e-Mahmoodabad
  In order to study water demand, vegetative growth and tuber grade of potato crop under water stress and different cultivation patterns in different drip irrigation regimes, a split plot experiment based on the randomized complete block design with three replications carried out at the Allarog Research Station, Ardebil, Iran, in 2004. Estimation of crop evapotranspiration was conducted by CROPWAT computer program based on the relationship between crop coefficient (Kc) and crop evapotranspiration. Different drip irrigation levels were 100, 80 and 60% of potato crop evapotranspiration. Different levels of cultivation patterns were: 1 row 75 cm on bed 75 cm (furrow to furrow), 2 rows 35 cm on bed 150 cm (furrow to furrow) and 2 rows 45 cm on bed 150 cm and sampling times were the third factor with 6 levels. It was found that yield and growth of aerial parts was significantly affected by water stress and sampling times. Cultivation patterns had only significant effect on above ground biomass. The maximum and the minimum values of most traits studied were observed at 100 and 60% crop evapotranspiration levels, respectively. Number of tubers with 28-50 mm and larger than 50 mm diameter in size were higher at 80 and 100% of full irrigation, respectively. Estimating of amount of water irrigation during irrigation period for 100, 80 and 60% of water irrigation were 558.7, 445.96 and 335.22 mm, respectively.
  M. Marjani , P. Tabarsi , K. Najafizadeh , F.R. Farokhi , B. Sharifkashani , S. Motahari , A. Abbasi , M.R. Masjedi and D. Mansouri

Background: Aspergillosis is one of the most important opportunistic infections after organ transplantation. Early diagnosis and initiation of appropriate antifungal therapy are key factors for better prognosis.

Methods: We reviewed the medical records of patients with solid organ transplantation with evidence of Aspergillus infections from December 2001 to January 2008, evaluating patient demographics, time of onset after transplantation, risk factors, radiologic appearance, diagnostic criteria, antifungal therapy, and outcome.

Results: We observed aspergillosis in 8 lung, 3 kidney, and 1 heart recipient, with overall mean age of 40.6 years. Seven cases of Aspergillus tracheobronchitis were diagnosed in lung transplant recipients, all of them in the first 6 months after transplantation. All patients responded to antifungal therapy and bronchoscopic debridement. We observed 5 cases of invasive pulmonary aspergillosis. Three patients survived in response to antifungal treatment. The two patients who died were treated with a combination of itraconazole and amphotericin B, whereas all cured patients had been treated with voriconazole alone or in combination with caspofungin.

Conclusion: It seems that the prognosis of aspergillosis in solid organ recipients is improving with new treatment regimens, particularly if they are used in early stages of infection.
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