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RISS 인기검색어
- 검색키워드
- 저자 : Dehghani Hamid (검색결과 4 건)
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( Hamid Reza Forutan ),( Mohammad Hadi Imanieh ),( Seyed Mohsen Dehghani ),( Reza Mostafavi ),( Farnaz Khademolhosseini ),( Davood Mehrabani ) 대한소화기학회 2007 SIDDS Vol.9 No.-
Background/Aims: As sodium hydroxide (NaOH) is frequently used as a cleaning agent for air conditioners in southern Iran, caustic esophageal injuries happen frequently especially in children. After undergoing several dilatation procedures of the esophagus, a number of these patients eventually require colon interposition, an operation by which the esophagus is replaced by a segment of colon. Colin interposition is a surgical treatment modality for patients with severe caustic injuries in the esophagus. This study describes the technique and results of colon interposition in patients who bad undergone this operation. Methods: All patients who underwent colon interposition in Nemazee Hospital affiliated to Shiraz University of Medicals. Sciences in southern Iran from April 1990 to April 2005, were enrolled in our study. Medical records of these patients were reviewed and they were called for a follow-up examination. Out of 18 patients, only eight patients responded. They underwent clinical examination, laboratory tests, imaging and endoscopy. Results: Growth retardation was seen in all cases. All radiographs of the chest revealed peribronchial thickening. Redundancy was seen in 60% of the patients. Lower junction stenosis, diverticulum and dilatation of the lower esophagus were commonly visible. Epigastric fullness (85%), dysphagia (57%), halitosis (45%), heartburn (45%), vomit-ting (45%), odynophaqgia (28%) and abdominal pain (28%) were the most common complications. They were no mortalities in our series. Conclusions: As growth retardation was the most common complication of colon interposition in children, an appropriate nutritional support seems to be necessary after the operation.
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Electronic Ballast for HPS Lamps with Intrinsic Power Regulation over Lamp Life
Dehghani, Majid,Saghaiannejad, Seid Mortaza,Karshenas, Hamid Reza The Korean Institute of Power Electronics 2009 JOURNAL OF POWER ELECTRONICS Vol.9 No.4
This paper introduces the electronic ballast for high pressure sodium (HPS) lamps which provides power regulation during the whole lamp life without using a closed-loop power control system, in spite of large variations of lamp characteristics resulting from lamp aging. The structure of the electronic ballast and the parameters of HPS lamps are described. A mathematical model for the ballast is developed and used for the design and analysis of the ballast. A design procedure is presented to design the ballast which provides intrinsic power regulation over the whole lamp life. To improve the technical specifications of the ballast, the practical and standard constraints are considered in the design. According to the design procedure, an electronic ballast for 250-W HPS lamps is designed. All theoretical analyses are verified with the help of a semi-industrial experimental setup. The results validate that the designed ballast provides power regulation during the whole lamp life.
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Electronic Ballast for HPS Lamps with Intrinsic Power Regulation over Lamp Life
Majid Dehghani,Seid Mortaza Saghaiannejad,Hamid Reza Karshenas 전력전자학회 2009 JOURNAL OF POWER ELECTRONICS Vol.9 No.4
This paper introduces the electronic ballast for high pressure sodium (HPS) lamps which provides power regulation during the whole lamp life without using a closed-loop power control system, in spite of large variations of lamp characteristics resulting from lamp aging. The structure of the elcctronic ballast and the parameters of HPS lamps are described. A mathematical model for the ballast is developed and used for the design and analysis of the ballast. A design proccdure is presented to design the ballast which provides intrinsic power regulation over the whole lamp life. To improve the technical specifications of the ballast, the practical and standard constraints are considered in thc design. According to the design procedure, an electronic ballast for 250-W HPS lamps is designed. All theoretical analyses are verificd with thc help of a semi-industrial experimental setup. The results validate that the designed ballast providcs power regulation during the whole lamp life.
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Gholizadeh Amir,Dehghani Hamid,Akbarpour Omidali,Amini Ashkboos,Sadeghi Kaveh,Hanifei Mehrdad,Sharifi-Zagheh Aram 한국작물학회 2022 Journal of crop science and biotechnology Vol.25 No.5
In this study, 17 morphological and agronomic traits as indicators for identifying salinity tolerance genotypes in wheat were evaluated among a set of 110 different genotypes including advanced lines in breeding programs, wheat landraces collected from landraces throughout Iran, some well-known tolerant and sensitive cultivars and many commercial wheat cultivars. Plant materials were grown under non-saline (NS) and saline stress (SS) conditions (Electrical conductivity [EC] of 2 and 10 ds m -1 , respectively). The membership function value of salinity tolerance (MFVS) was used as a comprehensive index for evaluation and selection of wheat salinity tolerance. A comprehensive evaluation method, the membership function value of salinity tolerance (MFVS), which combined the salinity-tolerant coefficient (SC) of morphological and agronomic traits that could be easily estimated, was used to investigate the wheat salinity tolerance in this study. The mean value of all 17 traits decreased under saline stress condition, among the 17 traits, spike weight (SW), kernel weight per spike (KWS), number of fertile tillers (NFT), biological yield (BY) and grain yield (GY) decreased >25%. This suggested that these 5 traits were more sensitive to salinity stress. Ten genotypes with highly salinity tolerance were selected based on MFVS and could be applied for salinity tolerance improvement in wheat. Correlation analysis indicated that the wheat salinity tolerance was highly significantly and positively correlated with variations of 13 traits under both non-saline and saline stress conditions (P < 0.01). Factor analysis showed that salinity-tolerant coefficients of 5 traits of grain yield, biological yield, spike weight, kernel weight per spike and number of fertile tillers have the most interrelationships with the membership value of salinity tolerance (MFVS). Therefore, these five traits could be applied as an indicator to screen wheat germplasm for salinity tolerance in wheat breeding programs.
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