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Search Results: 1 - 10 of 12962 matches for " Mohammad Rezaie "
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A New Combinational Terminology for Geothermal Systems  [PDF]
Mohammad Rezaie, Hamid Aghajani
International Journal of Geosciences (IJG) , 2013, DOI: 10.4236/ijg.2013.41005
Abstract:

A geothermal resource can be defined as a reservoir inside the Earth from which heat can be extracted economically Geothermal resources are classified on the basis of different aspects, such as heat source, heat transfer, reservoir tem perature, physical state, commercial utilization and geological settings. Unfortunately most of the current classifications that are used for geothermal systems are not complete. So, a combinational terminology of geological and tempera ture-based classifications would be more complete. This terminology can explain all geological situations, temperature and physical state of geothermal reservoir altogether. According to geological settings, in combinational terminology (from left to right), the class of geothermal resource’s name would be placed at first, then the physical state of reservoir (Liquid-dominated or Two-phase or Vapor-dominated) would be written and finally the class of the geothermal reser voir which is related to its temperature, is written.

The Source of Arsenic and Nitrate in Borrego Valley Groundwater Aquifer  [PDF]
Mohammad Hassan Rezaie-Boroon, Jessica Chaney, Bradley Bowers
Journal of Water Resource and Protection (JWARP) , 2014, DOI: 10.4236/jwarp.2014.617145
Abstract: Groundwater in California is very precious, yet what we can withdraw is often contaminated with natural and anthropogenic pollution sources. We have examined the Borrego Valley (BV) groundwater (N = 6 wells) in southern California to understand the source of arsenic and nitrate in some of its groundwater production wells. The results show that the arsenic values range from <2 ppb to 12.2 ppb and the nitrate values from <1 ppm to 10.2 ppm for different wells respectively. The results showed that the arsenic concentration increased 270% for the well # ID1-10 since 2004 and showed an increase of 63% since 2013 respectively. For other wells the results showed an increase of 147% and 72% since 2001. The nitrate concentration has jumped 42% in concentration since last year in one of the wells. The objective of this study is to understand the nature and source of arsenic and nitrate in BV groundwater aquifer as to how this change in arsenic and nitrate concentration occurs through the time. The arsenic retention in the sediments is highly variable and controlled by local processes as a result of natural weathering process of metamorphic bedrock. The second results from the development of strongly reducing conditions at near-neutral pH values, leading to the desorption of arsenic from mineral oxides and to the reductive dissolution of Fe and Mn oxides, also leading to arsenic release. The high arsenic concentrations in some groundwater wells in Borrego Valley CA require the need for reconnaissance surveys in mineralized areas of fractured crystalline basement. Net groundwater extraction values are based on an irrigation efficiency of 78 percent with 14 to 22 percent irrigation return. We believe that the return flow from irrigational activity could be one of the major sources of nitrate transferring the agricultural contaminants such as nitrate to Borrego Valley aquifer.
The Geochemistry of Heavy Metals in the Mudflat of Salinas de San Pedro Lagoon, California, USA  [PDF]
Mohammad Hassan Rezaie-Boroon, Vanessa Toress, Sonya Diaz, Teresa Lazzaretto, Mathew Tsang, Dimitri D. Deheyn
Journal of Environmental Protection (JEP) , 2013, DOI: 10.4236/jep.2013.41002
Abstract:

Sediment core samples were collected from the Salinas de San Pedro to assess the pollutant deposition processes in response to extensive human activities. Analysis of the sediment samples for heavy metals and some trace elements was conducted with ICP-OES for 20 sites showing enrichment for some of trace and heavy metals. The results demonstrated that heavy metal concentrations in mud varied greatly for each metal, with concentration values (mg/g) ranging from 1.05 - 4.8 (Al); 0.003 - 0.011(As); 0.001 - 0.005 (Cd); 0.02 to 0.82 (Cr); 0.085 - 0.47 (Cu); 5.98 - 14.22 (Fe); 0.06 - 0.19 (Mn); 0.03 - 0.67 (Ni); 0.05 - 0.38 (Pb); <0.008 - 0.069 (Se); 0.18 - 0.63 (Ti); 0.040 - 0.091 (V) and 0.149 - 0.336 (Zn). The Index of Geo-accumulation factor showed highest values for Pb, Mn, As, and Cu. Enrichment factors >1for these elements suggest anthropogenic inputs for most metals. The bioavailability of metals in lagoon sediments has the potential to be highly dynamic with local waste and natural H2S discharge from existing fault line.

Incidence and risk factors for infantile colic in Iranian infants
Elham Talachian, Ali Bidari, Mohammad Hossein Rezaie
World Journal of Gastroenterology , 2008,
Abstract: AIM: To assess the incidence of infantile colic and its association with variable predictors in infants born in a community maternity hospital, Tehran, Iran.METHODS: In this prospective cohort study, mothers who gave birth to live newborns between February 21 and March 20, 2003 at the hospital were invited to join to the study. For every infant-mother dyad data were collected on infant gender, type of delivery, gestational age at birth, birth weight, birth order, and mother’s reproductive history. Then mothers were given a diary to document the duration of crying/fussiness behaviors of their infants for the next 12 wk. We scheduled home visits at the time the infants were 3 mo of age to collect the completed diaries and obtain additional information on infants’ nutritional sources and identify if medications were used for colic relief. Cases of colic were identified by applying Wessel criteria to recorded data. Chi-square and Mann-whitney U tests were used to compare proportions for non-parametric and parametric variables, respectively.RESULTS: From 413 infants, follow-up was completed for 321 infants. In total, 65 infants (20.24%) satisfied the Wessel criteria for infantile colic. No statistical significance was found between colicky and non-colicky infants according to gender, gestational age at birth, birth weight, type of delivery, and, infant’s feeding pattern. However, firstborn infants had higher rate for developing colic (P = 0.03).CONCLUSION: Colic incidence was 20% in this population of Iranian infants. Except for birth order status, no other variable was significantly associated with infantile colic.
Biologic Management of Fistulizing Crohn’s Disease
Ali Rezaie,Bardia Taghavi Bayat,Mohammad Abdollahi
International Journal of Pharmacology , 2005,
Abstract: Fistulas, occurring in about 20 to 40% of Crohn’s disease patients, are usually resistant to conventional therapy of CD. Biologic therapies, which have revolutionary beneficial effects on diseases with an immunologic background, are a new horizon in treating fistulizing CD. The aim of this study was to evaluate the efficacy of biologic agents used to treat fistulizing CD after a brief overview on epidemiology and pathophysiology of fistulizing CD and definition of biologic therapy. Also it focuses on the trials and adverse effects of the biologic agents proved to be effective (Infliximab and CDP571).
Coupling between the Changes in CO2 Concentration and Sediment Biogeochemistry in Mudflat of Salinas de San Pedro, California, USA  [PDF]
Mohammad Hassan Rezaie-Boroon, Sonya Diaz, Vanessa Torres, Tresa Lazzaretto, Dimitri D. Deheyn
Journal of Environmental Protection (JEP) , 2013, DOI: 10.4236/jep.2013.410134
Abstract:

We investigated the effects of elevated carbon dioxide (CO2) on biogeochemistry of marsh sediment including speciation of selected heavy metals in Salinas de San Pedro mudflat in California. The Salinas de San Pedro mudflat has higher carbon (C) content than the vast majority of fully-vegetated salt marshes even with the higher tidal action in the mudflat. Sources for CO2 were identified as atmospheric CO2 as well as due to local fault degassing process. We measured carbon dioxide, methane, total organic carbon, dissolved oxygen, salinity, and heavy metal concentration in various salt marsh locations. Overall, our results showed that CO2 concentration ranging from 418.7 to 436.9 (ppm), which are slightly different in various chambers but are in good agreement with some heavy metal concentrations values in mudflat at or around the same location. The selected metal concentration values (ppm) ranging from 0.003 - 0.011 (As); 0.001 - 0.005 (Cd); 0.04 - 0.02 (Cr); 0.13 - 0.38 (Cu); 0.11 - 0.38 (Pb); 0.0009 - 0.020 (Se); and 0.188 - 0.321 (Zn). The low dissolved oxygen (ppm) in the pore water sediment indicated suboxic environment. Additionally, CO2 (ppm) and loss on ignition (LOI) (%) correlated inversely; the higher

Prevalence of mold allergy in patients with allergic rhinitis referred to Semnan clinic of allergy
Mohammad Nabavi,Raheb Ghorbani,Mohammad Hoseein Bemanian,Marziyeh Rezaie
Koomesh , 2009,
Abstract: Introduction: Environmental control of allergens and irritants is the essential part of allergy controland management. Molds are among important aeroallergens which can proliferate enormously in bothindoor and outdoor environments, especially in poor ventilated humid milieus. The prevalence of moldsensitization and some related factors in allergic rhinitis patients were investigated in the current study.Materials and Methods: In this cross sectional study, 300 patients with the signs and symptoms ofallergic rhinitis who referred to Semnan (Iran) allergy clinic during 2006-7 were selected and underwentskin prick test with standard extracts of allergens. "Wheal and Flare” reaction of each of the allergenswere compared with negative control and wheals of 3 mm larger than wheal of negative control and flaresof 10 mm larger than flare of the negative control were considered as positive and the patient wereregarded as sensitized to that allergen.Results: 26.7 %( 95% Confidence Interval: 21/7-31/7%) of patients demonstrated to have beensensitized to one or more allergenic molds. Aspergillus (12.3%) and Penicillium (8.3%) were shown to bethe most and the least commons allergenic molds, respectively. Cladosporium (11%) and Alternaria(10.7%) were among the important allergenic molds. There was no relationship between the prevalence ofmold allergy with urban and rural environments, and also patients’ gender. A significant association wasonly observed between age and Alternaria sensitization (P=0.036), but not found with other molds(P>0.05).Conclusion: Mold sensitization is a relatively common finding among patients with allergic rhinitis.Elimination or reduction of mold exposure in allergic patients is of special consideration and measures toreduce environmental factors which facilitate mold growth and proliferation is very important.
Protective Effect of Ethanolic Extract of Saffron (Dried Stigmas of Crocus sativus L.) on Hepatic Tissue Injury in Streptozotocin-Induced Diabetic Rats
Mohammad Rahbani,Daryoush Mohajeri,Ali Rezaie,Mehrdad Nazeri
Journal of Animal and Veterinary Advances , 2012, DOI: 10.3923/javaa.2012.1985.1994
Abstract: The negative impact of diabetes on the retinal, renal, nervous and cardiovascular systems is well recognized yet little is known about the effect of this disease on the liver. Oxidative stress is currently suggested as a mechanism underlying diabetes mellitus complications. The present study was designed to assess the liver injury as a complication of diabetes mellitus and to evaluate the hepaoprotective properties of ethanolic extract of Saffron (dried stigmas of Crocus sativus L.) in streptozotocin-induced diabetes in rats. Aminotransferases, Alanine Aminotransferase (ALT) and Aspartate Aminotransferase (AST) were measured to determine the concentration of intracellular hepatic enzymes that have leaked into the circulation and serve as a marker of hepatocyte injury. Alkaline Phosphatase (ALP) and bilirubin were measured to assess biliary function. Albumin was measured to reflect liver synthetic function. The lipid peroxidation product, Malondialdehyde (MDA) and reduced Glutathione (GSH) content was measured to assess free radical activity in the liver tissues. The enzymatic activities of Glutathione Peroxidase (GSH-Px), Superoxide Dismutase (SOD) and Catalase (CAT) were measured as indicators of antioxidation in liver tissue. Moreover, histopathological observations were assayed at the degree of hepatic injury. For this purpose, male Wistar rats were made diabetic with a single injection of STZ (75 mg kg-1 i.p.). Rats were randomly separated into four groups, each containing 10 animals: Group 1, healthy control rats; Group 2 non-diabetic rats were treated with 40 mg kg-1 b.w./day intraperitoneal (i.p.) injection of Saffron extract; Group 3, diabetic rats; Group 4, diabetic rats were treated with saffron extract (40 mg kg-1 b.w./day, i.p.) for a period of 8 weeks. At the end of the experiment, MDA contents of the liver tissue and serum levels of ALT, AST, AP and bilirubin in Groups 3 were found to be significantly increased as compared to Group 1 (p<0.05) and these serum biomarkers of hepatic injury and liver MDA level in Group 4 were significantly decreased as compared to Group 3 (p<0.05). The GSH, SOD, CAT and GSH-Px contents of the liver and serum albumin level in Group 3 was significantly decreased as compared to Group 1 (p<0.05) and were found to be significantly increased in Group 4 as compared to Groups 3 (p<0.05). Histopathological changes were in agreement with biochemical findings. Based on these findings, it is presumed that ethanolic extract of C. sativus L. stigma may have the hepatoprotective effect in experimentally induced diabetic rats. Researchers suggest that saffron extract has beneficial effects on antioxidant defence of diabetic liver tissue.
An Analysis of Factors Affecting on Online Shopping Behavior of Consumers
Mohammad Hossein Moshrefjavadi,Hossein Rezaie Dolatabadi,Mojtaba Nourbakhsh,Amir Poursaeedi
International Journal of Marketing Studies , 2012, DOI: 10.5539/ijms.v4n5p81
Abstract: The purpose of this study is to analyze factors affecting on online shopping behavior of consumers that might be one of the most important issues of e-commerce and marketing field. However, there is very limited knowledge about online consumer behavior because it is a complicated socio-technical phenomenon and involves too many factors. One of the objectives of this study is covering the shortcomings of previous studies that didn't examine main factors that influence on online shopping behavior. This goal has been followed by using a model examining the impact of perceived risks, infrastructural variables and return policy on attitude toward online shopping behavior and subjective norms, perceived behavioral control, domain specific innovativeness and attitude on online shopping behavior as the hypotheses of study. To investigate these hypotheses 200 questionnaires dispersed among online stores of Iran. Respondents to the questionnaire were consumers of online stores in Iran which randomly selected. Finally regression analysis was used on data in order to test hypothesizes of study. This study can be considered as an applied research from purpose perspective and descriptive-survey with regard to the nature and method (type of correlation). The study identified that financial risks and non-delivery risk negatively affected attitude toward online shopping. Results also indicated that domain specific innovativeness and subjective norms positively affect online shopping behavior. Furthermore, attitude toward online shopping positively affected online shopping behavior of consumers.
Classification and grading of canine malignant mammary tumors
Abbas Tavasoly,Hannaneh Golshahi,Annahita Rezaie,Mohammad Farhadi
Veterinary Research Forum , 2013,
Abstract: Histological grading is a good parameter to stratify tumors according to their biologicalaggressiveness. The Elston and Ellis grading method in humans, invasive ductal breastcarcinomas and other invasive tumors are routinely used. The aims of this study wereclassification of mammary gland tumors and also application of ahuman grading methodincanine mammary carcinoma. The samples included 37 tumors of mammary glands.Mammary tumors were carcinomas (n=32) and sarcomas (n=5). The carcinomas wereclassified as simple carcinoma 56.8% (n= 21), complex carcinoma13.5% (n= 5), carcinomaarising from benign tumor 10.8% (n= 4) and special type of carcinoma 5.4% (n= 2). Out of 32carcinomas studied, 37.5% (n= 12) grade I, 46.9% (n=15) grade II and 15.6% (n= 5) gradeIII. This study demonstrated that the Elston and Ellis method of histological grading in caninemammary tumor is a reliable prognostic factorwhichis correlated with histopathologicalclassification.
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