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Search Results: 1 - 10 of 462453 matches for " A Heidari "
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Agricultural Occupational Health Knowledge and Practice of Farmers in 2007 in Qom Province
A Heidari
Qom University of Medical Sciences Journal , 2012,
Abstract: Background and objectives: Occupational health is a very important issue in all sectors, and particularly, agriculture. Agriculture is a potentially hazardous industry associated with many occupational injuries and illnesses. Knowledge and practice of farmers and their educational needs is essential for preparation of a suitable educational package. This study aims to determine the level of knowledge and practice of farmers in regards to the occupational health in Qom agriculture industry. Methods: Two hundred Qom farmers were randomly entered into this cross-sectional study. A questionnaire was designed for data collection and the farmers were interviewed. SPSS 11.5 was used for data analysis. Results: We found that farmers have a low level of knowledge (10%) in regard to occupational respiratory, gastrointestinal and renal disorders. The lowest level of knowledge was related to the preventive measures including not blowing the nozzle of the pesticide sprayer (18%), noise reduction measures (18.5%), and application of sunscreen (20%). The most undesirable practices observed were wearing of filter mask (8%) and observance of safety measures for tractors’ driver cabin. Conclusion: Present findings suggest that farmers have inadequate knowledge in regard to occupational disorders. Therefore, effective interventions to increase their level of knowledge and safety of their occupational behavior are recommended.
Seroepidemiological Study of Toxoplasmosis among High-School Girls in Gonabad
A Heidari
Qom University of Medical Sciences Journal , 2012,
Abstract: Background and Objectives: Toxoplasmosis is a zoonosis with a high prevalence throughout the world. T. gondii infection is frequently asymptomatic. In high risk population serological screening isrecommended for identification of non-Immune women. Due to considerable prevalence of toxoplasmosis during childbearing age, identification of non-immune girls is necessary. The aim of this study was to determine the prevalence rate of anti toxoplasmosis IgG and IgM in high-school girls and to detect agents that increase prevalence of the disease. Methods: In this descriptive cross-sectional study, afterobtaining consent and completion of the questionnaire (Epidemiologic Profile), 240 blood samples were collected from high-school girls through cluster sampling method in spring 2009. A questionnaire was used for data collection for epidemiological factors. IgG and IgM specific antibodies to toxoplasmosis gondii were detected using enzyme-linked Immuno sorbent assay (ELISA). Chi-square test was used for determining the relationship between some variables associated with the serological results for anti-T. gondii antibodies. Results: 35 Out of 240 high-school girls, (14.6%) were positive for T. gondiiIgG. None of the sample showed anti-toxoplasma IgM antibodies. The statistical analysis showed a significant relationship between consumption of undercooked meat (p=0.01) and raw vegetables (p=0.03) with increasing seroprevalence of toxoplasmosis. There was no significant relationship between seropositive cases and other factors. Conclusion: The results of this study showed that in order to reduce infection consuming well-cooked meat and vegetable is necessary.
Structural master plan of flood mitigation measures
A. Heidari
Natural Hazards and Earth System Sciences (NHESS) & Discussions (NHESSD) , 2009,
Abstract: Flood protection is one of the practical methods in damage reduction. Although it not possible to be completely protected from flood disaster but major part of damages can be reduced by mitigation plans. In this paper, the optimum flood mitigation master plan is determined by economic evaluation in trading off between the construction costs and expected value of damage reduction as the benefits. Size of the certain mitigation alternative is also be obtained by risk analysis by accepting possibility of flood overtopping. Different flood mitigation alternatives are investigated from various aspects in the Dez and Karun river floodplain areas as a case study in south west of IRAN. The results show that detention dam and flood diversion are the best alternatives of flood mitigation methods as well as enforcing the flood control purpose of upstream multipurpose reservoirs. Dyke and levees are not mostly justifiable because of negative impact on down stream by enhancing routed flood peak discharge magnitude and flood damages as well.
Effects of clay mineralogy and physico-chemical properties on potassium availability under soil aquic conditions
Raheb,A; Heidari,A;
Journal of soil science and plant nutrition , 2012, DOI: 10.4067/S0718-95162012005000029
Abstract: aquic conditions performed for paddy cultivation may cause many nutritional problems. clay mineralogical composition plays an important role in this relation by affecting many physico-chemical and biological characteristics of soils. three forms of k including unavailable, slowly available and readily available k, exist in equilibrium in the soil system. relationships between soil potassium forms with the clay mineralogical suite and physico-chemical properties were determined in 33 soil samples collected from five from paddy soils, two from kiwi fruit and one from citrus land pedons in the north of iran. mineralogical analyses showed that smectite, illite and vermiculite were the most abundant clay minerals in the studied soils. mean soluble and exchangeable potassium in paddy soils were rather low compared to non-paddy soils due to potassium fertilization in non-paddy soils. non-exchangeable potassium in the samples containing smectite as dominant clay mineral was lower than the samples dominated by vermiculite, hydroxy-interlayer vermiculite (hiv) and illite. inability of the studied soils for potassium fixation was related to prevailed montmorillonitic type of smectite, which its layer charge originates from octahedral sheet. significant correlations (0.56**, 0.54**, 0.56**) were obtained between exchangeable potassium and clay content, organic carbon and cation exchange capacity respectively. therefore, taking into account both exchangeable and non-exchangeable k beside clay mineralogy and physico-chemical properties gives better indications for k potential and soil-quality management, compared to exchangeable form of k alone.
Effects of clay mineralogy and physico-chemical properties on potassium availability under soil aquic conditions
Raheb,A; Heidari,A;
Journal of soil science and plant nutrition , 2012, DOI: 10.4067/S0718-95162012005000029
Abstract: aquic conditions performed for paddy cultivation may cause many nutritional problems. clay mineralogical composition plays an important role in this relation by affecting many physico-chemical and biological characteristics of soils. three forms of k including unavailable, slowly available and readily available k, exist in equilibrium in the soil system. relationships between soil potassium forms with the clay mineralogical suite and physico-chemical properties were determined in 33 soil samples collected from five from paddy soils, two from kiwi fruit and one from citrus land pedons in the north of iran. mineralogical analyses showed that smectite, illite and vermiculite were the most abundant clay minerals in the studied soils. mean soluble and exchangeable potassium in paddy soils were rather low compared to non-paddy soils due to potassium fertilization in non-paddy soils. non-exchangeable potassium in the samples containing smectite as dominant clay mineral was lower than the samples dominated by vermiculite, hydroxy-interlayer vermiculite (hiv) and illite. inability of the studied soils for potassium fixation was related to prevailed montmorillonitic type of smectite, which its layer charge originates from octahedral sheet. significant correlations (0.56**, 0.54**, 0.56**) were obtained between exchangeable potassium and clay content, organic carbon and cation exchange capacity respectively. therefore, taking into account both exchangeable and non-exchangeable k beside clay mineralogy and physico-chemical properties gives better indications for k potential and soil-quality management, compared to exchangeable form of k alone.
Effects of clay mineralogy and physico-chemical properties on potassium availability under soil aquic conditions
A Raheb,A Heidari
Journal of Soil Science and Plant Nutrition , 2012,
Abstract: Aquic conditions performed for paddy cultivation may cause many nutritional problems. Clay mineralogical composition plays an important role in this relation by affecting many physico-chemical and biological characteristics of soils. Three forms of K including unavailable, slowly available and readily available K, exist in equilibrium in the soil system. Relationships between soil potassium forms with the clay mineralogical suite and physico-chemical properties were determined in 33 soil samples collected from five from paddy soils, two from kiwi fruit and one from citrus land pedons in the North of Iran. Mineralogical analyses showed that smectite, illite and vermiculite were the most abundant clay minerals in the studied soils. Mean soluble and exchangeable potassium in paddy soils were rather low compared to non-paddy soils due to potassium fertilization in non-paddy soils. Non-exchangeable potassium in the samples containing smectite as dominant clay mineral was lower than the samples dominated by vermiculite, hydroxy-interlayer vermiculite (HIV) and illite. Inability of the studied soils for potassium fixation was related to prevailed montmorillonitic type of smectite, which its layer charge originates from octahedral sheet. Significant correlations (0.56**, 0.54**, 0.56**) were obtained between exchangeable potassium and clay content, organic carbon and cation exchange capacity respectively. Therefore, taking into account both exchangeable and non-exchangeable K beside clay mineralogy and physico-chemical properties gives better indications for K potential and soil-quality management, compared to exchangeable form of K alone.
Polygenetic saline gypsiferous soils of the Bam region, Southeast Iran
Moghiseh,E; Heidari,A;
Journal of soil science and plant nutrition , 2012, DOI: 10.4067/S0718-95162012005000028
Abstract: gypsiferous and saline soils are among the major soils of arid and semi-arid regions of the world. although numerous studies on salic, gypsic and petrogypsic horizons have been carried out, the co-occurrence of gypsum and halite and their morphological expression are still poorly documented. eight pedons located on a co-alluvial fan (bam area, southeast iran) were described, sampled and analyzed for physico-chemical and micromorphological characteristics based on standard methods. the highest amounts of gypsum (~ 60 %) comprising xenotopic gypsum and/or fibrous bassanite pseudomorph remaining behind after xenotopic gypsum dehydration were determined in the surface crust and in the underlying 2byz horizon. at a depth of 15 cm, a horizon cemented by gypsum and halite was observed. the highest amount of gypsum was determined at the upper part of this horizon followed by a sharp decreasing trend towards the lower depth. the amount of halite increases with increasing depth towards the bottom of 3byzm horizon. deeper, in the 5byz horizon the quantity of gypsum increases drastically and coarse elongated gypsum pendants dominate. micromorphological observations demonstrate that the dominant cementing agent is halite rather than gypsum. however, due to inexistence of petrosalic diagnostic horizon in keys to soil taxonomy, these soils are to be classified as petrogypsic haplosalids at subgroup level in soil taxonomy. in wrb taxonomy, they are classified as petrosalic solonchaks. co-occurrence of gypsum and halite in the same horizon, their specific layering and vertical distribution patterns in the studied pedons might be considered as indicators for polygenetic soils in this area.
Polygenetic saline gypsiferous soils of the Bam region, Southeast Iran
Moghiseh,E; Heidari,A;
Journal of soil science and plant nutrition , 2012, DOI: 10.4067/S0718-95162012005000028
Abstract: gypsiferous and saline soils are among the major soils of arid and semi-arid regions of the world. although numerous studies on salic, gypsic and petrogypsic horizons have been carried out, the co-occurrence of gypsum and halite and their morphological expression are still poorly documented. eight pedons located on a co-alluvial fan (bam area, southeast iran) were described, sampled and analyzed for physico-chemical and micromorphological characteristics based on standard methods. the highest amounts of gypsum (~ 60 %) comprising xenotopic gypsum and/or fibrous bassanite pseudomorph remaining behind after xenotopic gypsum dehydration were determined in the surface crust and in the underlying 2byz horizon. at a depth of 15 cm, a horizon cemented by gypsum and halite was observed. the highest amount of gypsum was determined at the upper part of this horizon followed by a sharp decreasing trend towards the lower depth. the amount of halite increases with increasing depth towards the bottom of 3byzm horizon. deeper, in the 5byz horizon the quantity of gypsum increases drastically and coarse elongated gypsum pendants dominate. micromorphological observations demonstrate that the dominant cementing agent is halite rather than gypsum. however, due to inexistence of petrosalic diagnostic horizon in keys to soil taxonomy, these soils are to be classified as petrogypsic haplosalids at subgroup level in soil taxonomy. in wrb taxonomy, they are classified as petrosalic solonchaks. co-occurrence of gypsum and halite in the same horizon, their specific layering and vertical distribution patterns in the studied pedons might be considered as indicators for polygenetic soils in this area.
"Prevalence of Intestinal Parasites among Children in Day-care Centers in Damghan - Iran"
A Heidari,MB Rokni
Iranian Journal of Public Health , 2003,
Abstract: In order to identify the prevalence of parasitic intestinal infections and to determine the impact of some factors, such as age, health houses, education, environmental health etc, on infection, this survey was carried out on 461 stool specimens and scotch tapes obtained from children resident in day-care centers in Damghan city, Semnan province, Iran. The samples were tested using formalin-ether concentration and Graham methods. The analysis of the results showed that at least 68.1 percent of the individuals tested, were infected with one species of pathogen or non-pathogen parasites. The rate of infection for Enterobius vermicularis, Giardia lamblia, Entamoeba histolytica, Ascaris lumbricoides, Hymenolepis nana, Entamoeba coli, Blastocystis hominis, Iodamoeba butschlii and Chilomastix mesnili was 33.8%, 26.2%, 2.4%, 3%, 4.8%, 5.8%, 4.8%, 2.7% and 4% respectively. A significant difference was seen between the rate of infection and parents’ education (P<0.005) but was negative regarding age, sex, and health houses. It is concluded that sanitary measurements should be conducted in such centers to decrease the rate of parasitic infection.
Predictive accuracy of nonstress test in high risk pregnancies
Niroomanesh Sh,Heidari A
Tehran University Medical Journal , 2000,
Abstract: There are now several tests available that can assess fetal status. A series of 164 cases of high risk pregnancies were studied in order to assess predictive value of a nonstress test. The majority (36%) of patients complained about postdate pregnancy. A nonreactive test was identified in 24 of the patients (14.6%). Fetal distress, low Apgar score in 1 and 10 minutes after birth and mean of Apgar score in 5 minutes, cesarean section due to fetal distress, congenital anomalies, need of neonatal care, IUGR, abnormal presentation and perinatal death were much more common in the group of pregnancies with a nonreactive NST than in the group with reactive test. The difference was statistically significant. A reactive test was found to be a good predictor of the healthy fetus. Negative predictive value and specifity of the test were found 80% and 91.9%, respectively. The nonreactive test could identify a population at risk but it was not helpful as a stand alone modality in decision making, because of the low sensitivity and positive predictive value rates (33.3% and 58%).
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