oalib

OALib Journal期刊

ISSN: 2333-9721

费用:99美元

投稿

时间不限

2017 ( 362 )

2016 ( 737 )

2015 ( 10806 )

2014 ( 13741 )

自定义范围…

匹配条件: “Moradkhani S” ,找到相关结果约324129条。
列表显示的所有文章,均可免费获取
第1页/共324129条
每页显示
Comparative Study of Histopathologic Responses of Dog’s Dental Pulp to Formocresol vs.15.5% Ferric Sulfate after Pulpotomy
E Jabbarifar,P Deyhimi,S Moradkhani
Journal of Isfahan Dental School , 2006,
Abstract: Introduction: Pulpotomy is one of the most common treatments in Pediatric dentistry. Variousmodalities and materials have been applied in human and animal clinically. These procedures havebeen evaluated clinically, radiographically and rarely histopathologically. The purpose of this study iscomparison of histopathologic reaction of dog’s dental pulp to formocresol (standard procedure) andferric sulfate (new modality). Methods and Materials: Forty dog’s sound permanent teeth were selected. After Anesthetizing ofanimal, 20 teeth was randomly pulpotomised, with formocrosol and 20 teeth with 15.5% ferric sulfate.After one month, animal was anesthetized again and sacrificed by vital perfusion. After that, teeth weredissected from Jaws and sent to Isfahan oral histopathology lab. Histologic sections were blindlyobserved by oral pathologist and reported state of inflammation, depth of inflammation, calcification,dentinal bridge, internal resorption and necrosis. Then frequency and relative frequency of theseparameters were analyzed by Chi-square and Mann-Whitney in SPSS software. Results: Inflammation was not observed in 70% formocresol group and 75% ferric sulfate group.Calcification was not observed in 75% ferric sulfate group and 80% formocresol group. Necrosis wasnot observed in 55% ferric sulfate group and 65% formocresol group. Dentinal bridge was notobserved in 65% formocresol group and 45% ferric sulfate group. Conclusion: Considering the findings of this study and other studies, insignificant differences betweenthe results in two groups, and also other aspects and characteristics, ferric sulfate can be one of properalternative pulpotomy modalities in primary dentition and developing permanent teeth. Key words: Pulpotomy, Formocresol, Ferric sulfate, Histopathologic, Responses, Animal study.
Evaluation of the concentration of Proinflammatory/Pro Th1 Cytokines IFN- and TNF-α and anti inflammatory/Pro Th2 Cytokines IL-13 and IL-4 in breast milk and their relationship to atopic dermatitis
Moradkhani S,Mahdi M,Daneshvar H,Bazargan Harandi N
Tehran University Medical Journal , 2013,
Abstract: Background: Atopic dermatitis (AD) is one of the most common chronic, highly pruritic and inflammatory skin diseases. The exclusive influence of breastfeeding in the prevention of inflammatory diseases is a matter of debate. In this study, we aimed to determine the concentration of interferon-gamma (IFN-γ), tumor necrosis factor-alpha (TNF-α), interleukin-13 (IL-13) and interleukin-4 (IL-4) cytokines as anti Th2 or anti Th1 cytokines in breast milk and their relationship with atopic dermatitis in breastfed infants.Methods: This study carried out in Afzalipour Hospital of kerman during one year from 2010 to 2011, we selected 50 breastfed infants with AD as cases and 50 healthy infants without AD or any other allergic disease as the controls. The concentrations of pro- and anti-inflammatory cytokines were measured by ELISA in the mothers' milk. The demographic characteristics were recorded in a data collection form. Moreover, severity of the disease was determined by SCORAD index. T-test and logistic regression were used for assessment of the correlation among study variables. Results: The concentrations of IFN-γ and IL-13 were significantly higher (respectively, P=0.04, and P=0.02) in the case group. However, logistic regression revealed that only IFN-γ significantly increased the risk for atopic dermatitis (P=0.02). Concentration of TNF-α was similar in the milk from mothers belonging to the two groups.Conclusion: The results indicate that the concentrations of IFN-γ, IL-13 and IL-4 cytokines are higher in the milk of mothers whose infants have AD. However, the risk for atopic dermatitis increases by 49% by every ten-unit (in pg/mL) increase in the level of IFN-γ.
Evaluation of mouse fibrosarcoma tumor by [18F] FDG radiopharmaceutical
M. Akhlaghi,A. R. Jalilian,K. Shafahi,S. Moradkhani
Iranian Journal of Nuclear Medicine , 2006,
Abstract: Objectives: FDG has been widely used for detection and localizing of various tumors. Positron emission tomography using FDG can be a golden standard, when evaluation of other tumor seeking agents is needed. In this study, efficacy of FDG has been tested in our in-house made fibrosarcoma-bearing mice. Methods: In this study, fibrosarcoma tumor cells, cultivated in cell cultures, were injected to normal mice. After induction in 3 weeks, a dual head gamma camera system was used to detect the tumor position in the animals. As standard, 100 microlitres (60 μCi) of FDG was injected to the animal via their tail veins and imaging performed 35 minutes post injection. Results: The co-incidence images showed the tumor localization in the tumor-bering animals. The images clearly showed the site of fibrosarcoma tumors with exact geometry. Conclusion: The exact FDG localization in the human-derived fibrosarcoma tumors presents the high value of this agent for PET scan of fibrosarcomas in human studies.
Effect of salicylic acid treatment on cadmium toxicity and leaf lipid composition in sunflower
Moradkhani S.,Khavari Nejad R. A.,Dilmaghani K.,Chaparzadeh N.
Journal of Stress Physiology & Biochemistry , 2012,
Abstract: The ameliorative effect of salicylic acid (SA) on cadmium (Cd) toxicity in sunflower plants was studied by investigating plant growth and fatty acid composition. Sunflower plants in two leaves stage were exposed to CdCl2 treatment (0, 50, 100, 150 and 200 μM) and then were treated with salicylic acid (0, 250 and 500 μM) as foliage spraying. One week after the last salicylic acid treatment,plants were harvested and growth parameters were measured . Oil of leaf was extracted in a Soxhlet system and fatty acid composition were measured by gas chromatography (GC). Statistical analyses showed excess Cd reduced growth parameters (fresh weight and length of stems and roots, fresh weight and number of leaves)and SA increased them compared with the control. Maximum reduction in these parameters was at 200 μmol Cd and 0μmol of SA. Cd caused a shift in fatty acids composition, resulting in a lower degree of their unsaturation and an increase in saturated fatty acids in sunflower leaves,whereas SA improved them. SA, particularly increased the percentage of linolenic acid and lowered that of palmitic acid by the same proportion. These results sugg membrane integrity due to lipids est that SA could be used as a potential growth regulator and a stabilizer ofprotection of cadmium-induced oxidative stress to improve plant resistance to Cd stress
Hydrologic Remote Sensing and Land Surface Data Assimilation
Hamid Moradkhani
Sensors , 2008, DOI: 10.3390/s8052986
Abstract: Accurate, reliable and skillful forecasting of key environmental variables such as soil moisture and snow are of paramount importance due to their strong influence on many water resources applications including flood control, agricultural production and effective water resources management which collectively control the behavior of the climate system. Soil moisture is a key state variable in land surface–atmosphere interactions affecting surface energy fluxes, runoff and the radiation balance. Snow processes also have a large influence on land-atmosphere energy exchanges due to snow high albedo, low thermal conductivity and considerable spatial and temporal variability resulting in the dramatic change on surface and ground temperature. Measurement of these two variables is possible through variety of methods using ground-based and remote sensing procedures. Remote sensing, however, holds great promise for soil moisture and snow measurements which have considerable spatial and temporal variability. Merging these measurements with hydrologic model outputs in a systematic and effective way results in an improvement of land surface model prediction. Data Assimilation provides a mechanism to combine these two sources of estimation. Much success has been attained in recent years in using data from passive microwave sensors and assimilating them into the models. This paper provides an overview of the remote sensing measurement techniques for soil moisture and snow data and describes the advances in data assimilation techniques through the ensemble filtering, mainly Ensemble Kalman filter (EnKF) and Particle filter (PF), for improving the model prediction and reducing the uncertainties involved in prediction process. It is believed that PF provides a complete representation of the probability distribution of state variables of interests (according to sequential Bayes law) and could be a strong alternative to EnKF which is subject to some limitations including the linear updating rule and assumption of jointly normal distribution of errors in state variables and observation.
Hydrologic Remote Sensing and Land Surface Data Assimilation
Hamid Moradkhani
Sensors , 2008,
Abstract: Accurate, reliable and skillful forecasting of key environmental variables such as soil moisture and snow are of paramount importance due to their strong influence on many water resources applications including flood control, agricultural production and effective water resources management which collectively control the behavior of the climate system. Soil moisture is a key state variable in land surface ¢ € “atmosphere interactions affecting surface energy fluxes, runoff and the radiation balance. Snow processes also have a large influence on land-atmosphere energy exchanges due to snow high albedo, low thermal conductivity and considerable spatial and temporal variability resulting in the dramatic change on surface and ground temperature. Measurement of these two variables is possible through variety of methods using ground-based and remote sensing procedures. Remote sensing, however, holds great promise for soil moisture and snow measurements which have considerable spatial and temporal variability. Merging these measurements with hydrologic model outputs in a systematic and effective way results in an improvement of land surface model prediction. Data Assimilation provides a mechanism to combine these two sources of estimation. Much success has been attained in recent years in using data from passive microwave sensors and assimilating them into the models. This paper provides an overview of the remote sensing measurement techniques for soil moisture and snow data and describes the advances in data assimilation techniques through the ensemble filtering, mainly Ensemble Kalman filter (EnKF) and Particle filter (PF), for improving the model prediction and reducing the uncertainties involved in prediction process. It is believed that PF provides a complete representation of the probability distribution of state variables of interests (according to sequential Bayes law) and could be a strong alternative to EnKF which is subject to some limitations including the linear updating rule and assumption of jointly normal distribution of errors in state variables and observation.
Climate Change and Energy Management Strategies  [PDF]
Elshan Moradkhani
Computational Water, Energy, and Environmental Engineering (CWEEE) , 2017, DOI: 10.4236/cweee.2017.6211
Abstract: Current climate challenges and energy concerns have urged scientists, researchers, and governments to take action in order to reduce carbon footprint and energy consumption. Considering the growing need for energy supplies, the reliability and sustainability of power plants are another area of concern for communities. Since building is among the major consumers of electricity (almost 40%), the energy management strategies have been substantially focused on demand side management and building operation system. Energy efficiency, peak-load management, and demand response are among the most outstanding and widespread practices in order to reduce building energy consumption and peak demand. Smart grids and smart meters are considerably gaining the attention of policy makers in most developed and developing countries. This paper will revolve around these outstanding energy management strategies and technologies and their merits and drawbacks in the journey of current communities towards sustainability.
DHC-PET 18F-FDG brain scintigraphy in tinnitus patient, the first experience of FDG images in Iran
Fariba Saddadi,Sedigheh Moradkhani
Iranian Journal of Nuclear Medicine , 2010,
Abstract: Introduction: Brain FDG PET scan is ideal for assessment of some brain disease. Iran, cause of some problem, has no experience of PET yet but 3 years ago the first FDG imaging was started in cooperation with a national research group from ENT and Head & Neck Research Center, Iran University of Medical Sciences which their main goal is to evaluate treatment response of patients with tinnitus to gabapantine and to find any brain changes as a document. They came to us to nuclear medicine department of atomic energy organization of Iran to do scan in two periods of time as pre and post treatment. Methods: The interesting part of this research for our department which made us to involve is two things, first to assess the efficiency of FDG that produced in the first time in cyclotron and the second to test DHC system for brain PET image. Although we did both SPECT and FDG PET scan for almost 65 subjects with DHC system but only PET images is our mandatory focus at least for our department. With FDG images data they found that Brain PET scan can be valuable imaging technique in the assessment of patients with tinnitus which Characteristics of abnormalities depend on age and side of tinnitus. Results: We found that although the DHC-PET scan has not as good quality as real ring PET but it still can work. Conclusion: The more disadvantage and in the other word the limitation of this system is the lower resolution and more attenuation of DHC which is a defect for this system to assess the sub-cortical tissue and to evaluate the small lesion in brain and the other one is a weak anatomical mapping which needs a precise fusion of those image with MRI.
A Statistical Method for Determining the Best Zinc Pregnant Solution for the Extraction by D2EHPA  [PDF]
Hossein Kamran Haghighi, Davood Moradkhani, Mohammad Mehdi Salarirad
International Journal of Nonferrous Metallurgy (IJNM) , 2013, DOI: 10.4236/ijnm.2013.24020
Abstract:

The application of D2EHPA in zinc solvent extraction has extensive background. To utilize more effectively, response surface methodology was used to optimize the concentration condition of zinc pregnant solution (ZPL) extracted by D2EHPA. In the current research, zinc, iron and manganese extraction along with separation factor of zinc-iron (Sf (Zn-Fe)) and zinc-manganese (Sf (Zn-Mn)) were considered as the response values. The optimal ZPL conditions extracted with 30% D2EHPA as the extraction solvent were as follows: Zn 21.96 g/L, Fe 382.57 ppm, Mn 1 g/L, Sf (Zn-Fe) 8.26 and Sf (Zn-Mn) 1529.82. In addition, it was found that the iron and manganese concentration were the most effective factors affecting the zinc and manganese extraction, respectively.

The precise methods for the measurement of collimator hole angulations and Center of rotation of SPECT with adaptive quality control phantom
Hossein Zamani Zeinali,Moradkhani Moradkhani,Anita Alipour,Abass Majdabadi
Iranian Journal of Nuclear Medicine , 2010,
Abstract: Introduction: The Adaptive Quality Control Phantom (AQCP) is the computer-controlled phantom which positions and moves a radioactive source in the Field of View (FOV) of an imaging nuclear medicine device on a definite path to produce any spatial distribution of gamma rays to perform the QC Tests such as the Collimator Hole Angulation (CHA) and the Center OF Rotation (COR) of Single Photon Emission Computer Tomography (SPECT). Methods: The collimator hole angulation for three collimators were measured with the method by using a point source and computer-controlled cylindrical positioning. In this method the displacement of the image of a point source examined as the AQCP move point source vertically away from the collimator face. A new method for center of rotation assessment by AQCP is introduced and the results of this proposed method as compared with the routine QC test (IAEA-TECDOC-602 method) and their differences are discussed in detail. Results: The results of the high-accuracy measurement method of CHA show that the measurement accuracy for absolute angulation errors is better than ±0.024 . The Root Mean Square (RMS) of CHA for LEHR, LEHS and LEUHR collimators were measured to be 0.290°, 0.292° and 0.208° respectively. In addition, it has been proved and established that the precise measurement of the distance of the point source movement vertically away from the collimator face has had a great effect on the CHA measurement. It is to be added in this connection that the measured RMS of CHA for LEHR collimator with the distance variation from the collimator's surface +/-1 mm has been varied +/-0.04 degree. Conclusion: Based on such comparison between the two afore-described methods, it proofs the mechanical problems of detector rotation should be considered as the main cause of the difference between the two methods under consideration. We defined and measured a new parameter called Dynamic Mechanical Error (DME) for applying the gantry motion correction
第1页/共324129条
每页显示


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.