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OALib Journal期刊

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The origination of left coronary artery from right valsalva sinus: report of three cases
Ghaemian A,Jalalian R
Tehran University Medical Journal , 2009,
Abstract: "n Normal 0 false false false EN-US X-NONE AR-SA MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:Arial; mso-bidi-theme-font:minor-bidi;} Background: Coronary artery anomalies may be seen in 1-5% of coronary angiographies. Origin of the left coronary artery from right aortic cusp is a very rare anomaly and its incidence is about 0.15%. This anomaly could be presented by myocardial ischemia and even sudden cardiac death during exercise in young patients. For the diagnosis of coronary anomalies different diagnostic modalities such as, echocardiography, angiography and CT angiography can be helpful."n"nCases: We report 3 cases with this anomaly and two of them did not have any lesion in their coronary arteries One of these patients had severe coronary artery disease and underwent coronary artery bypass graft surgery."n"nConclusion: Although abnormal origin of left coronary artery from right aortic valsalva sinus is a rare anomaly, due to causing ischemic cardiac symptoms and the possibility of sudden cardiac death it is considered an important anomaly. For definite diagnosis of this anomaly coronary angiography and/or CT angiography is useful.
Aortocoronary Dissection during Diagnostic Coronary Angiography: Treatment with Multiple Stenting of the Coronary Artery
R Jalalian,A Ghaemian
Iranian Cardiovascular Research Journal , 2010,
Abstract: Catheter-induced combined coronary artery- ascending aorta dissection following diagnostic coronary angiography is rare. Localized aortic dissection has been treated by stenting the coronary artery and sealing the entry point. We describe a very long spiral right coronary artery dissection extending to the ascending aorta during coronary angiography. The dissection was limited to the proximal 35mm of the ascending aorta evaluated by Transesophagial echocardiography and was successfully treated by multiple stenting of the right coronary artery including the entry point of the aortic dissection which was monitored by means of echocardiography.
Application of BSNE Sampler to Evaluate Vertical Distribution of Wind Eroded Sediment in Eastern Isfahan
H. R. Karimzadeh,A. Jalalian
Journal of Science and Technology of Agriculture and Natural Resources , 2002,
Abstract: For the study of field wind erosion and the design and evaluation of wind erosion control techniques, detailed observations of soil particle transport and vertical destribution of eroded soil particles are needed. The objectives of this study were: 1) To describe one device for soil transport particle measurement, i. e. the BSNE sediment catcher; and 2) To assess vertical distribution of wind–eroded sediment with height in eastern Isfahan. The BSNE sediment catcher is a wind erosion sampler that traps eroded material at seven heights of 0.24, 0.60, 1.08, 2.00, 3.00, and 4.00 m above the soil surface. Each trap consists of a steel container with an inlet and outlet, mounted on a wind vane that rotates about a central pole. Before using the sampler in the field, it was tested and calibrated in the wind tunnel. The results showed that the average trapping efficiency with speeds ranging from 5.2 to 7.2 m sec-1 for 4 different wind–eroded sediments was 0.44 to 0.68. However the trapping efficiency depended on wind speed, particle size distribution, particle density and type of sediment. The sampler had the lowest efficiency for particles < 44 μm. A BSNE sediment catcher was installed in Babaii Air Base. After a sampling period, the sediment in each trap was collected and weighed. The trapped materials were a mixture of saltation and suspension particles. Vertical distribution of wind–eroded sediment showed that the amount of soil collected decreased with increased height and the percentage of fine particles (<63μm) increased with height. The amount of trapped materials for each cm2 frontal intake with increased height were 12.00, 3.42, 1.44, 1.56, 0.75, 0.21, and 0.39 g cm-2, respectively, for the one sampling period.
The Effect of Preparation Design on the Fracture Resistance of Zir-Conia Crown Copings (Computer Associated Design/Computer Associated Machine, CAD/CAM System)
E. Jalalian,B. Atashkar,R. Rostami
Journal of Dentistry of Tehran University of Medical Sciences , 2011,
Abstract: Objective: One of the major problems of all ceramic restorations is their probable fracture against the occlusal force. The aim of the present in-vitro study is was to compare the effect of two marginal designs (chamfer & shoulder) on the fracture resistance of zirconia copings, CERCON (CAD/CAM).MATERIALS AND METHODS: This in vitro study was done with single blind experimental technique. One stainless steel dye with 50’ chamfer finish line design (0.8 mm depth) was prepared using milling machine. Ten epoxy resin dyes were made, The same dye was retrieved and 50' chamfer was converted into shoulder (1 mm).again ten epoxy resin dyes were made from shoulder dyes. Zirconia cores with 0.4 mm thickness and 35 μm cement Space fabricated on the20 epoxy resin dyes (10 samples chamfer and 10 samples shoulder) in a dental laboratory. Then the zirconia cores were cemented on the epoxy resin dyes and underwent a fracture test with a universal testing machine (GOTECH AI-700LAC, Arson, USA) and samples were investigated from the point of view of the origin of the failure.RESULT: The mean value of fracture resistance for shoulder margins were 788.90±99.56 N and for the chamfer margins were 991.75±112.00 N. The student’s T-test revealed a statistically significant difference between groups (P=0.001).CONCLUSION: The result of this study indicates that marginal design of the zirconia cores effects on their fracture resistance. A chamfer margin could improve the biomechanical performance of posterior single zirconia crown restorations. This may be because of strong unity and round internal angle in chamfer margin.
Clay Mineralogy of Gypsiferous Soil Developed on Different Landforms in the Eastern Part of Isfahan
H. R. Karimzadeh,A. Jalalian,H. Khademi
Journal of Science and Technology of Agriculture and Natural Resources , 2004,
Abstract: Clay minerals deserve special attention as they play a crucial role in many soils. The clay mineralogy of five gypsiferous soils from different landforms in eastern Isfahan was investigated using X-ray diffraction (XRD). In addition, soil aggregates and wind-deposited sediments were examined by scanning electron microscope (SEM) and analyzed by energy dispersive X-ray analyzer (EDX). The results indicate the presence of palygorskite, mica, kaolinite, chlorite, and quartz with a trace amount of vermiculite and randomly interstratified layers in all soils. Smectite occurs in soils of both the piedmont plain and old river terrace, but not in the alluvial fan soils. Mica, chlorite, quartz, and kaolinite were probably inherited from the parent material. Palygorskite seems to increase with depth in the alluvial fan, whereas, in the old terrace soils, this clay mineral decreases with depth. Palygorskite present in alluvial fan soil appears to have been formed authigenically when the basin was covered with shallow hyper-saline lagoons toward the end of the Tertiary. Palygorskite in the old terrace seems to be mostly detrital and an eolian origin of palygorskite is likely because a large amount of palygorskite is present in upper soil horizons. A higher proportion of smectite in deep soils of the old terrace, as compared with palygorskite, suggests the possibility of authigenic formation of smectite from palygorskite. .
Comparison of the Effect of Conventional and Electroforming Methods on Marginal Integrity: an in Vitro Study
Noorbakhsh M.,Jalalian E.,Baghbanbashi R.,Soleimani M.
Journal of Dentistry , 2012,
Abstract: Statement of Problem: Absence of marginal integrity is one of the most important problems in the fixed restoration treatments.Purpose: The aim of this study is to compare the effect of conventional and electroforming methods on the marginal integrity at PFM restorations.Materials and Method: In this experimental study, after preparing the metal standard die and molding, 20 plaster dyes were prepared and then randomly divided into two groups of ten each.PFM crowns were prepared using the conventional method in the first group and electroforming method in the second group. After cementing the samples on the die and mounting in transparent resin and grating, all the samples were observed in the electron microscope. Then, the data were analyzed using t-test.Result: The mean marginal discrepancy and SD was 11.16 ± 1.28 micron in the first group and 3.13 ± 0.79 micron in the second group. T-test results showed that the differences between the two groups were significant ( p <0.05).Conclusion: According to the result of this study, marginal adaptation in electroforming crowns is better than casting crowns.
Effect of Different Clay Mulches on the Amount of Wind Eroded Materials
H. Majdi,M. Karimian- Eghbal,H. R. Karimzadeh,A. Jalalian
Journal of Science and Technology of Agriculture and Natural Resources , 2006,
Abstract: Stabilizng sand dunes has been one of the main challenges in the arid regions. So far, different kinds of mulches have been used extensively for sand dune stabilization. This study was carried out to determine the optimum composition, concentration and thickness of clay mulch for sand dune stabilization. For this purpose two soil samples from clay flats of a playa with different amount of salinity from Ardestan area were used to make clay mulches. A sand dune sample was selected as bed for applying the mulch. To select the right ingredient and treatments, clay samples were mixed with sand and different amount of water, and sprayed on sand dune bed. In addition, wheat straw was added to some mixture to test its effect on stability of the mulch. Treatments with lowest crack and highest penetration of mulch in sand bed were selected for the experiment in this study. Mulch treatments contained (1): 250g sand dune + 250g clay + 25g straw; (2) 250g clay + 25g straw; (3) 250g sand + 250g clay; (4) 250g clay; (5) 125g sand + 125g clay and (6) 125g clay. All treatments were mixed with 500ml water. The experimental design was a CRD with a 6(mulch) * 2(thickness)* 2 EC factorial method with 3 replications. The results showed that clay mulch were resistant to wind erosion, but erosion took place when they had been bombarded with sandblast. The mulches with straw showed the highest resistance to erosion as compared to other treatments. With increasing the number of mulch layers, resistant to erosion also increased. The added stability of mulch was due to the increase in mulch thickness and also increases in clay and silt content. The overall result of this study shows that the mulch with two layers and higher mixture of clay and sands was the best treatment for the stabilization of sand dunes.
Welcome to electronic physician journal
Mehrdad Jalalian
Electronic Physician , 2009,
Abstract: I am delighted to welcome you to the first issue of "Electronic Physician" Journal, the first electronic journal in Iran with license from Iranian ministry of culture. With your help we aim to make this journal a reputable publication for medical and health science. The electronic physician is an electronic journal which publishes the research works as well as reviews, case reports, documentaries and other acceptable formats of articles.I would like to express my great gratitude to all the authors for their excellent contribution to the journal and the reviewers for their efforts in starting up this journal. It is expected that with the efforts of the great editors of the journal we receive new research articles from all parts of the world.The next volume of the journal will be published in 2010 and each manuscript is expected to be published online as soon as it passes the peer review process.
What we have done!
Mehrdad Jalalian
Electronic Physician , 2010,
Abstract:
The Prevalence and Antibiotic Resistance of Shigella sp. Recovered from Patients Admitted to Bouali Hospital, Tehran, Iran During 1999-2001
M.J. Hosseini,R. Ranjbar,H. Ghasemi,H.R. Jalalian
Pakistan Journal of Biological Sciences , 2007,
Abstract: The present study was conducted to determine the prevalence of serotypes and antibiotic resistance in Shigella spp. isolated from patients admitted to Bouali hospital, Tehran, Iran during 1999 to 2001. All cases of shigellosis that were diagnosed according to their clinical pictures and microbial cultures were included in current study. Patients' age ranged from 12 to 89 years. Overall, 52 patients (56%) and 41(44%) were males and female, respectively. From a total of 90 Shigella isolates, 40 strains were identified as S. sonnei (45%), 26 as S. flexneri (27.9%), 3 as S. boydii (3%) and 21 as S. dysenteriae (24%). More than 95% of the isolates were susceptible to ciprofloxacin, ceftriaxone and ceftizoxim, 70% to nalidixic acid and less than 50% to co-trimoxazole, tetracycline, ampicillin and fourazolodon.
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