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Articles by A. Ebadi
Total Records ( 11 ) for A. Ebadi
  Alireza M. Goltabar , R. Shamstabar Kami and A. Ebadi
  In this research, buildings with 2-15 stories and different heights were put together using GAP joint element and nonlinear time-history analyses were done for Tabas, Elcentro and Sakaria accelerographs. The responses of both impact and non-impact cases were compared. With results analyzing, we found out that the impact increased the responses in taller buildings but decreased them in shorter ones. The largest increase was occurred when the height difference was 3 stories. Then the effective parameters in impact phenomenon, hardness and the distance between the structures were studied. The results shown that existence of the distance and hardening the structures (esp. in taller ones) may result to decrease the effect of impact in the structure responses.
  K. Shahbazi , A. Tobeh , A. Ebadi , B. Dehdar , A. Mahrooz , Sh. Jamaati-e-Somarin and M. Shiri-e-Janagrad
  To study Nitrogen (N) agronomic use efficiency and nitrate accumulation in potato (Solanum tuberosum L.) tubers as affected by cultivar and N fertilizer level, an experiment was carried out in Ardabil Agriculture Research Station, Iran in 2008. It was based on a completely Randomized Block Design with four replications. The factors included N fertilizer with four levels (0, 80, 160 and 240 kg pure N ha-1) and three cultivars (Satina (V1), Draga (V2) and Agria (V3)). Results showed that with the increase in N level up to 160 kg ha-1, fresh tuber yield significantly increased in cv. Agria. At final harvest, late-maturity cultivar had the highest fresh tuber yield (51.75 t ha-1) under the N level of 160 kg ha-1. With further increase in N level up to 240 kg ha-1, fresh tuber yield and tuber number of late-maturity cv. Agria started to fall. Cv. Agria had the highest N agronomic use efficiency with applying 160 kg N ha-1 and cv. Draga (mid-maturity) had the lowest one with applying 240 kg N ha-1. With the increase in N level, nitrate content of tuber fresh matter and dry matter significantly increased. Cv. Agria, which produced the highest tuber yield, had the lowest nitrate content. Early-maturity cultivars (e.g., Satina) were more prone to accumulate nitrate than late-maturity ones (e.g., Agria). With the increase in N over the optimum level, in addition to yield drop, nitrate content excessively increased. Therefore, fertilizer level of 160 kg N ha-1 was the best level for cv. Agria to produce a high level, but Satina and Draga did not show statistically significant difference in their yields under different fertilizer levels. In group 2, however, under all N levels, Satina had significantly higher tuber yield than Draga. This study proposes fertilizer level of 160 kg N ha-1 as the most optimum fertilizer level for cv. Agria to realize a high yield while Satina and Draga did not show statistically significant difference in their yields at different fertilizer levels.
  A. Ebadi , N. Saki , S. Nikakhlagh and F. Rahim
  The aim of this study was to evaluate the hemodynamic effects of adenoidectomy under general anesthesia from May 2004 to August 2008. In this retrospective study, 747 patients from 1 to 15 years of age were scheduled underwent general anesthesia with mixture of thiopentone with atracurium, fentanyl and glucose-free solutions, for adenoidectomy surgery compatible with the technique. The following factors were assessed: age, ASA physical status, gender, preoperative, during operation and post-operative pulse rate. A total of 747 adenoidectomy were performed during the study period. One hundred and twenty three cases (16.46%) had bradycardia during adenoidectomy. More population were under 3 years old (49.55%) and males (76.7%). Out of 123 cases that developed bradycardia, 80 cases without need to atropine treatment and only 43 cases that need intravenous Atropine for control of it. Adenoidectomy is the most common operations performed in children under general anesthesia. Adenoidectomy related incidents were the most common cause and were more likely to occur during the maintenance phase of anesthesia, due to the vagal stimulation. Bradycardia due to surgery stimulation happened very early and patients were able to recover from the administration of atropine.
  F. Rahim , A. Ebadi , G. Saki and A. Remazani
  This research was performed to study the prevalence of Congenital Heart Diseases (CHDs) in Iranian population. Data on the prevalence of CHDs were collected and analyzed from the major hospitals of Ahwaz, Khuzestan Province, Iran from the year 1998 to 2007. The present investigation in Ahwaz, from 1998 to 2007, revealed a mean prevalence of 12.30 per 1000 live births of the total 3061 inpatients and live births with a yearly prevalence varying from 7.93 to 17.51 per 1000 live births. The most frequent type of CHD was found to be Atrial Septal Defect (ASD) (19.54%) followed by Tetralogy of Fallot (TOF) (16.99%), Patent Ductus Arteriosus (PDA) (17.97%), Shunt (11.47%) and Ventricular Septal Defect (VSD) (11.07%). The prevalence of CHDs in Ahwaz is increasing from 1998 to 2007 which might be due to the improvement of diagnosis, attention or awareness among the medical authorities on the disease. The prevalence of CHDs in Ahwaz is not very high, however; it is an important disease which needs an immediate medical attention.
  F. Rahim , B. Keikhaei and A. Ebadi
  Respiratory function tests and arterial blood gas analysis were performed on 59 patients with β-thalassemia major (27 M, 22 F, age range: 18-45 years). All investigations were performed 24 h before the patients received a blood transfusion or when they were in a stable state hematologic condition. Echocardiography was performed in all patients and the ejection fraction was employed as a measure of cardiac function. No patient had clinical signs of pulmonary dysfunction. Pulmonary function tests, however, showed a reduction of all main parameters (TLC, FEV1, FEV1/FVC, FEF 25-75% and RV) in most patients with β-thalassemia major, indicating a restrictive type of dysfunction. Arterial blood gas values were within the normal range. There was no evidence that the observed abnormalities in pulmonary function were secondary to congestive heart failure. The low hemoglobin concentration and a fall in the diffusing capacity of the alveolar-capillary membrane, together with the dependence of the reduced pulmonary diffusing capacity on age and serum ferritin levels, as well as of the entity of restrictive disease on age, suggests that pulmonary dysfunctions in patients with TM are due mainly to lung fibrosis and/or interstitial edema related to iron overload. Also iron deposition due to repeated blood transfusions may play a central role in determining lung alterations although the majority of patients are well chelated, suggesting that more than one causal mechanism could be involved.
  M. Salehpour , A. Ebadi , M. Izadi and Sh. Jamaati-e-Somarin
  In order to investigate the response of Lentil cultivar Gachsaran to nitrogen and water stress under hydroponics conditions, a factorial experiment based on randomized complete block design was conducted with three replications using Hoagland nutrient solution without nitrogen, at the growth chamber in 2007, Ardebil, Iran. Factors were four water stress levels (0, -0.6, -0.9 and -1.2 MPa) prepared with polyethylene glycol (PEG) and three nitrogen levels (0, 0.5 and 1.0 Mmol). Results showed that all traits were decreased with increasing stress. Both treatments had significant effects on Relative Water Content (RWC), Leaf Chlorophyll Content (LCC), Leaf Area (LA), length, height and dry weight of stem and Total Biomass (TB) and their interaction effects on LCC (before and after stress), LA (p<0.05) and on length and dry weight of stem (p<0.01). The most values of RWC, LCC, LA, length and dry weight of stem and total biomass were obtained using 0.5 Mmol nitrogen is sufficient and higher values is not recommended because of its preventive effect on nitrogen fixation in plant.
  M. Hassanzadeh , A. Ebadi , M. Panahyan-e-Kivi , A.G. Eshghi , Sh. Jamaati-e-Somarin , M. Saeidi and R. Zabihi-e-Mahmoodabad
  In order to evaluate drought stress on relative water content (RWC) and chlorophyll content of 27 Sesame genotypes, a factorial experiment based on randomized complete block design with three replications was conducted in 2006 in Moghan region, Iran. Factors were 27 Sesame genotypes (Karaj 1, Yekta, Oltan, Moghan 17, Naz takshakheh, Naz chandshakheh, Borazjan 2, Borazjan 5, Darab 14, Varamin 37, Varamin 237, Varamin 2822, Zoodrass IS, Hendi, Chini, Yellow white, 5089, Panama, Do-1, TF-3 , TKG-21, J-I, RT-54, Hendi 9, Hendi 12, Hendi 14 and Jiroft) and irrigation levels (full irrigation and irrigation until flowering stage). Results showed that Varamin 2822 and Varamin 237 genotypes had the highest RWC of 84.100 and 81.217%, respectively. The most chlorophyll a content was observed in Hendi 9 genotype of 106.237, the most chlorophyll b in Karaj 1 genotype of 84.665 and the most chlorophyll total in Hendi genotype of 182.395 mg g-1 leaf fresh weight. It seems that Varamin 2822 genotype having the highest RWC and Hendi 9 and Hendi genotypes having the most chlorophyll a and chlorophyll total, respectively, are recommended for planting in arid and semi-arid conditions.
  M. Panahyan-e-Kivi , A. Ebadi , Ahmad Tobeh and Sh. Jamaati-e-Somarin
  To evaluate the yield and yield components of lentil genotypes under drought stress conditions, an experiment was conducted in Ardabil Agricultural Research Station during 2005 in a split-plot experimental design based on Completely Randomized Block Design (CRBD) with four replications. The treatments included four irrigation levels [(I1) irrigation on the basis of 60 mm evaporation, (I2) irrigation on the basis of 80 mm evaporation, (I3) irrigation after 100 mm evaporation from basin class A, and (I4) no irrigation] as the major factor and three lentil genotypes (Ardabil local variety, ILL4400 and ILL6212) as the minor factor. The results showed that irrigation water deficit during lentil flowering led to the decrease in pod number, grain number per plant, grain weight, grain yield and harvest index, so that I2 level of genotype ILL4400 had the highest yield followed by ILL 6212 and Ardabil local variety and I4 had the lowest yield. I3 level of ILL6212 had the highest harvest index and genotypes ILL4400 and ILL6212 had the highest grain number per plant.
  N. Bahavar , A. Ebadi , A. Tobeh and Sh. Jamaati-e-Somarin
  To study the effects of N application on growth and biomass of a local variety (cv. Kabouli) of chickpea under water deficit, a study was carried out hydroponically in growth chamber using three concentrations of N (0.25, 0.5 and 1 Mm) and four levels of drought stress (0, -0.3, -0.6 and -0.9 MPa) in three replications in the form of a completely random block design in 2007, Ardebil, under the Iran conditions. Water deficit stress were evaluated for leaf water content, leaf water potential, membrane stability index, chlorophyll content, leaf area, root area, root/shoot ratio, nodule water content, nodule number and biomass. According to observed data, N application was increased the leaf water content, membrane stability, chlorophyll, leaf water potential, leaf area, nodule water content, nodule number and biomass. The experiment showed that N fertilizer application (with a concentration of 1 Mm) can increase leaf and nodule Relative Water Content (RWC), leaf water potential, membrane stability index, leaf chlorophyll content, leaf area and biomass under water deficit condition. Therefore, it seems that mineral nitrogen application can mitigate the adverse effects of water deficit stress and improve growth and biomass in chickpea. Consequently, nitrogen application after moisture stress decrease negative effects drought.
  F.S. Ghotb Abadi , M. Mostafavi , A. Eboutalebi , S. Samavat and A. Ebadi
  Citrus species are sensitive to salinity and such conditions greatly reduce their growth and yield. This study was conducted to evaluate the biomass and proline level changes in six citrus rootstocks, namely alemow, citromelo, rough lemon, volkamerlemon, sour orange and Mexican lime under salt stress. The study was performed in a greenhouse with NaCl and CaCl2 induced salinity treatments as 0.57 (control) and 2.5 and 5 (dS m-1) for twelve weeks. Biomass accumulation and proline content of leaves and roots measured at the end of the experiment. Biomass accumulation decreased with increasing salinity level and the lowest rate of reduction in biomass accumulation observed in sour orange. Increasing the salt levels led to significant increase in proline content of leaves and roots regardless to the salt types. The salt type did not significantly affect the proline level and or biomass accumulation. Proline level was higher in the leaves of all rootstocks compared to their roots. The highest and the lowest proline levels in the leaves were observed in the citromelo and rough lemon, respectively; and the highest and the lowest levels of root proline were found in alemow and citromelo, respectively. Since, the species displayed similar trends in proline increments in responding to the salinity levels and there found no illustrative correlation between sensitivity to salinity and proline accumulation in leaves or roots. It is concluded that proline accumulation is a better index of salinity levels exerted on the plant than the salinity tolerance index.
  M. Hassanzadeh , A. Ebadi , M. Panahyan-e-Kivi , Sh. Jamaati-e-Somarin , M. Saeidi and A. Gholipouri
  In order to investigate the effects of water stress on yield and yield components of 27 sesame genotypes, a factorial experiment based on randomized complete block design with three replications was conducted in 2006 in Moghan region, Iran. Factors were, 27 sesame genotypes (Karaj 1, Yekta, Oltan, Moghan 17, Naz takshakheh, Naz chandshakheh, Borazjan 2, Borazjan 5, Darab 14, Varamin 37, Varamin 237, Varamin 2822, Zoodrass IS, Hendi, Chini, Yellow white, 5089, Panama, Do-1, TF-3 , TKG-21, J-I, RT-54, Hendi 9, Hendi 12, Hendi 14 and Jiroft) and second factor was irrigation levels (complete irrigation and irrigation until flowering). Results showed that the highest yield belonged to Karaj1, Oltan, Naz takshakheh and Varamin 237 of 861.87, 863.47 and 859.73 kg ha-1. Naz takshakheh had the highest 1000-seed weight of 3.771 g. The highest seed No. per capsule and No. of capsule per plant was related to Chini and Naz chandshakheh genotypes of 107.250 and 99.13, respectively. So, Karaj 1, Oltan, Naz takshakheh and Varamin 237 genotypes in order to planting under drought stress conditions are recommended.
 
 
 
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