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Search Results: 1 - 10 of 5322 matches for " Mohammed Gharagozlou "
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The prevalence of asthma and allergic disorders among school children in Gorgan
Hadi Bazzazi,Mohammed Gharagozlou,Mehrdad Kassaiee,Afshin Parsikia
Journal of Research in Medical Sciences , 2007,
Abstract: BACKGROUND: The prevalence of allergy and asthma among children is increasing in many countries. However, such inclination has not been completely cleared in North of Iran. This study was carried out to evaluate the prevalence of asthma and allergic diseases in school children in Gorgan and also to evaluate the association between allergies and sex, family history of atopic disorders, and personal symptomatic atopy. METHODS: This was a cross-sectional study and the study population included 2800 school children aged 12 to 13 (53% female and 47% male). All participants completed an ISAAC (International Study of Asthma and Allergies in Childhood) written questionnaire. RESULTS: Among the selected children, 7% were asthmatic, 19% had eczema during the last 6 months, and 35.3% had rhinitis. Family history of allergy included 8.4% asthma, 22.1% rhinitis and 12% eczema. CONCLUSIONS: The prevalence of asthma is higher in boys compared with girls. There was a strong relation between family history of atopy and allergic diseases and asthma in children.
Environmental and Geo-Referenced Information Modeling for Sustainable Development in Iran  [PDF]
Alireza Gharagozlou, Mahsa Adl
Journal of Geographic Information System (JGIS) , 2012, DOI: 10.4236/jgis.2012.41004
Abstract: By providing Geo-referenced information, which serves as an important tool for decision-making in land use planning, national mapping agencies can help provide effective monitoring of environmental resources while in many parts of the world lack adequate information in clear. Their role in sustainability and development planning is thus unique and es- sential. National cartographic centers and national mapping agencies offers example of such national mapping agencies. Accurate information on land and environmental resources is essential to effective land use planning. Key sources of in- formation include topographic maps, aerial photos, satellite images, and data derived from geographic information sys- tems (GIS). At the national level, this information can be used to identify environmental resources, reveal the develop- ment potential of the country, and help promote effective ecological studies and sound land use planning with a land use planning approach. This article begins with some general comments on the importance of land use planning, and outli- nes some current environmental issues and also highlights the connection between roles of Geo-referenced information in land use planning with a sustainable development approach. The discussion describes several key methods of resour- ce identification, with particular emphasis on aerial photography and the existing potentials of Iran in this field. The ar- ticle also discusses the role that the Geo-referenced information and environmental planning play in developing and promoting geographic information system use to sustainable development and finally present proper models to use en- vironmental information and geo-referenced data for sustainable development.
Influence of calcination temperature on structural and magnetic properties of nanocomposites formed by Co-ferrite dispersed in sol-gel silica matrix using tetrakis(2-hydroxyethyl) orthosilicate as precursor
Mehrnaz Gharagozlou
Chemistry Central Journal , 2011, DOI: 10.1186/1752-153x-5-19
Abstract: Magnetic nanocomposites consisting of spinel ferrite nanoparticles in a non magnetic SiO2 matrix exhibit interesting properties arising in size effects and magnetic interactions [1-5]. Among them, CoFe2O4-SiO2 magnetic nanocomposites have high potential for applications as magnetic fluids [6], drug delivery [7], and high density information storage [8] due to remarkable properties of bulk cobalt ferrite (high saturation magnetization and coercivity, strong anisotropy, mechanical hardness and chemical stability) [9], combined with the magnetic properties characteristic of nanoparticles, which depend strongly on particle shape and size, particle-matrix interactions and degree of dispersion throughout the matrix. Recently, cobalt ferrite nanoparticles were also known to be a photomagnetic material that shows a remarkable light induced coercivity change [10-12].Based on the above technological challenge and scientific importance, researches such as ceramic method [13], sol-gel [14], co-precipitation [15], solvent evaporation [16], hydrothermal [17], combustion [18], microemulsion [19] and citrate methods [20] have been made into various synthesis routes of nanocrystalline ferrites. In the earlier report, cobalt ferrite nanoparticles have been synthesized by the polymeric precursor method [21]. While the nanoparticles obtained usually have a strong tendency to aggregate, this makes it very difficult to exploit their unique physical properties [22]. To reduce the unwanted crystallite coarsening and particles aggregation, attempts have been made to synthesize nanocomposites by embedding ferrite nanoparticles in a suitable matrix [23]. Different matrixes such as resins [24], polymer films [25] and silica glasses [26,27] have been studied. Studies on magnetic nanocomposites of ferrite nanoparticles dispersed in the silica matrix [28,29] have revealed a behavior different from that of bulk systems.Among various synthetic routes, sol-gel process has proved to be an efficient m
Spatial Analysis for Flood Control by Using Environmental Modeling  [PDF]
Alireza Gharagozlou, Hassan Nazari, Mohammadjavad Seddighi
Journal of Geographic Information System (JGIS) , 2011, DOI: 10.4236/jgis.2011.34035
Abstract: To create the final spatial information and analysis, flood hazard maps and land development priority maps and information, data for the flood events to 2009 in north of Iran were incorporated with using Geo-spatial Information System data of physiographic divisions, geologic divisions, land cover classification, elevation, drainage network, administrative districts and population density and environmental parameters modeling. Special analysis also attention was paid to population density for the construction of the land development priority map and using satellite image analysis to determine land use changes and analysis of geo-spatial information, because highly dense populated areas represent the highly important urban and industrial areas. While geo-information technology offers an opportunity to support flood management adequate geo-spatial information is a prerequisite for sustainable development, but many parts of the world lack adequate information on environmental resources. Such information providing, which serves as an important tool for decision-making in land use planning, can help provide effective information to natural disaster management. This paper develops a framework for flood control and begins with some general comments on the importance of land use planning and outlines some current environmental issues and then presenting environmental models to use in disaster management plan by using GIS and remote sensing results. Flood control is a complex problem that requires cooperation of many scientists in different fields. The article also discusses the role that geo-information and environmental planning and GIS and remote sensing technology play in disaster management control to reduce negative impacts of flood and present proper alternatives for developing of Gorganrood in the north of Iran. Advanced high-resolution sensor technology has provided immense scope to the decision makers for analysis of flood and damages details using GIS and remote sensing.
3D Analysis and Investigation of Traffic Noise Impact from Hemmat Highway Located in Tehran on Buildings and Surrounding Areas  [PDF]
Hamid Reza Ranjbar, Ali Reza Gharagozlou, Ali Reza Vafaei Nejad
Journal of Geographic Information System (JGIS) , 2012, DOI: 10.4236/jgis.2012.44037
Abstract: This study analyzes and investigates the impact of traffic noise on high rise buildings and surrounding areas by the side of Hemmat Highway that links west of Tehran to the east. In this study, a 3D traffic noise simulation model is applied on a GIS system. Visualized noise levels are formulated by the proposed model for noise mapping on all surfaces of the buildings and surrounding ground in a 3D platform. The investigation shows that there is a high traffic noise impact on the foreground and front facades of buildings, rendering these areas unsuitable for residential purposes. The ground area by the sides of buildings and the building side panels receive a lower noise impact. Most of these areas are still not acceptable for residential and even commercial use, only the back yards and back panels, have the lowest traffic noise impact. It also shows that the building height is not an effective factor for reducing motorway noise on the upper part of the building. Finally, construction cantilever barriers with a height of seven meters, close to the outer edge of the highway was presented as an effective way to reduce noise within the allowable range of noise pollution for commercial and residential purposes.
The Necessity of Using Cloud Computing in Monitoring Metropolitan Performance
-Case Study: Tehran Metropolitan Urban Observatory
 [PDF]

Ali Madad, Ali Reza Gharagozlou, Ali Reza Vafaei Nejad
Journal of Geographic Information System (JGIS) , 2013, DOI: 10.4236/jgis.2013.56049
Abstract:

Due to the metropolitan area of immense diversity and breadth of their construction activities, the performance of activities at districts level, cannot be precisely evaluated. Therefore, generally, it monitors only the indices which are defined for those functions. Furthermore, district-based development policy, and decentralization of governance, necessitate more local autonomy, which requires closer monitors of districts for being sure of its movements in the frame of urban developing plans. The advancement of technology has created the expectation that we can monitor all details of the metropolitan administrative processes and involve them in decision support systems for urban management. In this study, a web based SDSS prototype has been implemented to monitor the Tehran development plans progress at districts level. This interactive system presents a map of Tehran which indicates the realization of each component of the city master plan in different parts of town. The design of system lets all districts produce and support their own reporting maps, and it presents them in their dedicated place of city map by snapping all districts reports, when a city report arises. Also it elaborates the problem of implementing and proposes cloud computing facilities as a solution.

Zoning of CO Emissions in Tehran in the Medium Term by Using Third Quartile as the Exposure Candidate  [PDF]
Alireza Gharagozlou, Alireza Tayeba, Maryam Dadashi, Hadi Abdolahi
Journal of Geographic Information System (JGIS) , 2014, DOI: 10.4236/jgis.2014.65043
Abstract: CO is one of the main air pollutant which leads to many problems for human. Mega cities such as Tehran have critical issues by increasing the vehicles, fuel usage and urban area expansion. Hence, to have a clear view points on the pattern of CO concentration in Tehran, the data of 14 air quality concentration centers in a midterm period (2009 and 2012) are used. The main novelty of this research is using the third quartile (Q3) as the pollution indicator which leads to more accurate results based on the exposure pattern in a day. Additionally, by Spline interpolation model and using ArcGIS software the zoning maps to show the CO concentration in urban area are illustrated and discussed. Using Q3 instead of the mean values showed more accurate results due to the exposure patterns. Due to the results, the CO concentration shows a downward trend and the most changes are in the Western side of the city.
Correlation of Endoscopic Findings with Various Helicobacter pylori Tests among Dyspeptic Patients  [PDF]
Mohammed O. Mohammed
International Journal of Clinical Medicine (IJCM) , 2014, DOI: 10.4236/ijcm.2014.519151
Abstract: Background: Helicobacter pylori is the most common chronic bacterial infection, and a significant etiological factor in acid peptic diseases and gastric cancer. Dyspepsia is a common gastrointestinal disorder, and the most common indication for gastroscopy. Detection of H. pylori during endoscopy has become standard clinical practice. Elevated levels of inflammatory markers such as C-reactive protein (CRP), are associated with pathological changes, and hence give useful information for exact diagnosis and therapy. Objectives: To determine the relationship between endoscopic findings, highly sensitive C-reactive protein level (hs-CRP) and H. pylori infection among dyspeptic patients using serological tests, stool antigen for H. pylori and antral histology. Methods: This was a prospective study; patients with dyspepsia, who referred to Kurdistan Teaching Center of Gastroenterology & Hepatology in Sulaimani City were assessed, during the period of December 2012 to March 2014. They underwent gastroscopy, and biopsies were taken from the corpus and antral portions of antral portion for histopathological exam. Patients’ serum samples were tested for H. pylori infection using ELISA method to detect (IgG & IgA) anti-bodies and stool samples were examined using rapid immunoassay method to detect H. pylori antigens. hs-CRP was assessed using ELISA. Results: One hundred dyspeptic patients were included in the study. The mean age was 34.2 years and male comprised 54% of the study samples. The common findings in oesophagogastroduodenoscopy (OGD) examination were antral gastropathy (59%) and duodenal ulcer (21%). A statistically significant (P < 0.01) correlation was found between hs-CRP and H. pylori IgG and IgA levels (titer). There was a highly significant (P < 0.01) correlation between the level of H. pylori IgG and the endoscopic findings. The highest serum level of H. pylori IgG was found in duodenal ulcer and antral gastritis, (88.86 ± 42.0) and (70.05 ± 35.2) Au/ml, respectively. There was a highly significant correlation (P < 0.01) between endoscopic findings and H. pylori positive antral biopsy, in duodenal ulcer, antral gastritis and duodenitis was 100%, 94.9% and 75% respectively. Also duodenal ulcer and antral gastritis showed high mean and percentage but no significant differences in both H. pylori IgA and stool Antigen.
Hexaaquazinc(II) bis[tris(3-carboxypyridine-2-carboxylato)zincate(II)]
Mehrnaz Gharagozlou,Vratislav Langer,Andya Nemati
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810047252
Abstract: The title compound, [Zn(H2O)6][Zn(C7H4NO4)3]2, consists of two [Zn(py-2,3-dcH)3] anions (py-2,3-dcH is 3-carboxypyridine-2-carboxylate) and one [Zn(H2O)6]2+ cation. The anion is a six-coordinate complex located on a threefold rotation axis with a slightly distorted octahedral geometry around Zn2+ ion. The cation is also six-coordinate with an octahedral geometry around the Zn atom, located at a overline{3} axis. Non-covalent interactions such as π–π stacking [centroid–centroid distance = 3.828 (4) ] and O—H...O hydrogen bonds play important roles in stabilizing the supramolecular structure.
DETERMINATION OF PREVALENCE OF SURGICAL FINDINGS IN PATIENTS WITH APPENDICITIS
M. R. Zafarghandi,P. Gharagozlou,M. Mobasher
Acta Medica Iranica , 1999,
Abstract: The goal of this prospective study was to determine die prevalence of certain surgical findings in Iranian patients with appendicitis in one of our surgical centers, including: position of the appendix, rate of true appendicitis, perforation, and peritonitis. Duplication was observed in 4%, surface exudate in 52%, gangrenous necrosis in 27%, swelling in 79%, appendix in the left lower quadrant in 2%, and mucocele in 2% of the cases.
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