Quantity & quality analysis and associated management practices of solid waste generated in the general dentistry offices in the city of Arak, 2015 (original) (raw)
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Dental Environment Stress and Students' Personality in Rafsanjan Dentistry School
Iranian Journal of Medical Education, 2011
Introduction: Dentistry educational environment loads stress to the students.This can be harmful for educational system. The aim of this study was to investigate the stress perceived by the students in dentistry educational environment and the stress due to students' personality in Rafsanjan Dentistry School. Methods: In this cross-sectional study, the sample was selected from students of Refsanjan Dentistry school by census sampling in 2009. The Dental Environment Stress (DES) questionnaire was employed to assess perceived stress from dentistry environment, and the fourth part of Coudron stress questionnaire was used to investigate the stress due to students' personality. Data were analyzed by ANOVA, Tukey post Hoc, T-test and Pearson's rank correlation. Results: Mean score of stress was 1.89± 0.54 (out of 4). The highest and the lowest perceived stress means were for the third (2.53± 0.25) and the first year students (1.54± 0.29) respectively. Among stressful domains, clinical work (2.39± 0.83) and personal factors (1.06± 0.53) had the highest and the lowest means, respectively. The highest stress mean was for completing clinical requirements (2.95± 1.06). There was no significant difference in environmental perceived stress between male and female students (P>0.05). Stressful personality was seen in 84.8% of students .There was no association between the means of DES and the students' stressful personality (r = 0.17, P = 0.05). Conclusion: The level of stress in Dentistry school is moderate with the highest level for clinical work. Although majority of dentistry students have stressful personality, it doesn't seem to increase the stress perceived by them due to dentistry environment. According to the highest level of stress in third year students, special interventions are recommended for this critical study year.
مهندسی بهداشت محیط, 2019
Background and Objective: In this research, the performance of coagulation and flocculation process for the removal of pollutants from raw wastewater as well as anaerobic unit effluent of biological treatment of textile dyeing factory wastewater treatment plant was investigated. Methods: For this purpose, the Jar test unit as a batch reactor, FeCl3, PAC, and Alum as coagulants, and two polyelectrolytes, namely, Zetafloc 7563 and Megafloc 3045PWG as cationic and anionic flocculants were used and the effect of coagulant dosage and type as well as flocculant type on removal of COD, turbidity and color were investigated in two stages. Findings: The results of coagulation and flocculation experiments on raw wastewater showed that Alum at concentration of 40 mg/L was the most effective coagulant with COD, turbidity and color removal efficiency of 73.1±1.5%, 93.7% and 71.7%, respectively. However, the results of coagulation and flocculation experiments on the effluent from biological anaerobic treatment unit showed that the highest percentage of COD and turbidity removal were 52.2±2.6% and 99.1%, respectively that corresponds to PAC with concentration of 2000 mg/L. Additionally, the COD removal efficiency of FeCl3 coagulant at concentration of 400 mg/L was 52.2±3.5%. The difference in the results of the two stages was due to the change in the nature of the pollutants after exposure to biological treatment and different pH of the wastewater used in these stages. Discussion and Conclusion: A general review of the results showed that use of physicochemical treatment applying only coagulation and flocculation process could not reduce the pollutants present in the dyeing wastewater for reuse, while this method could be considered as a pretreatment or one of the secondary treatment steps and post treatment.
Journal of Rafsanjan University of Medical Sciences, 2018
دشاب یم . رد تیلاعف ياه یتعنص ، کینکت ياه یبایزرا و تیریدم کسیر زا هدافتسا قیرط زا درکیور يریگشیپ و اب فده دوبهب ینمیا يارب شهاک ثداوح هب راک هتفرگ یم کسیر یسررب فده اب هعلاطم نیا .دوش تسیز ياه نزاخم رد یتشادهب و ینمیا ،یطیحم هریخذ س .دش ماجنا نایسراپ زاگ شیلااپ تکرش يزاگ تاناعیم يزا شور و داوم :اه لاس رد یفیصوت هعلاطم نیا 1395 تسیز تارطاخم ییاسانش .تفریذپ ماجنا و ینمیا ،یطیحم یتشادهب تیلاعف و تاسیسات زا لصاح وم یناسنا ياه هریخذ نزاخم رد دوج تاناعیم يزاس یفلد کینکت زا هدافتسا اب يزاگ و ماجنا کسیر سپس شور زا هدافتسا اب هدش ییاسانش ياه AHP ) Analytical Hierarchy Process ( هلسلس لیلحت و هیزجت ، یبتارم (FMEA) و هیزجت و احلیلحت لا ت تسکش یسررب آ و اث ر نآ تیولوا و یبایزرا دروم .تفرگ رارق يدنب هتفای اه : هعلاطم نیا رد 17 هک دش ییاسانش کسیر 12 سیر تسیز هب طوبرم نآ ک و یطیحم 5 و ینمیا هب طوبرم کسیر یتشادهب دوب هب جیاتن ساسا رب . تسیز کسیر نازیم نیرتلااب ،هدمآ تسد یطیحم ینمیا و ،بیترت هب نزاخم رد یتشادهب شتآ زوس ددع اب يدمع و یتسیرورت لماوع رثا رب ي RPN ) Priority Nnmber Risk ( ، 824 / 1 یح ...
Journal of Health, 2019
Background & objectives: Modeling with software is a fast way to predict the extent of material release range and simulate its consequences. Due the arrival of the large number of dangerous goods, including styrene, from the petrochemical industries to the port of Imam Khomeini, it is necessary to evaluate the consequences and potential damages of this material.This study was conducted in 2014 in Imam Khomeini Port Container Terminal with the aim of predicting and estimating the possible human and environmental consequences of the release of this hazardous material during transportation process. Methods: In this study, with the use of PHAST and ALOHA softwares, the effect of toxicity of styrene was studied as a dangerous good entered into the container terminal. The analysis was performed by identifying the range of areas with highest adverse effects. Results: According to the results, the extent of pollution coverage (the forbidden region) was at least in a radius of 67 meters and the best place for placement of support groups was in a radius of 329 meters of dangerous goods area. The study also showed that based on the coverage of the risk range in these modeling, ALOHA software had a high environmental sensitivity, because the amount of LOCs considered in the consequence of the explosion was lower and it considered more danger zones. Finally, management measures were pointed to prevent or reduce the potential consequences of hazardous goods storage sites and warehouses in the study area. Conclusion: The environmental outcomes of dangerous goods containers in Imam Khomeini port are likely to be probable. So that the release consequences of these materials can cause a lot of environmental damage and accidents. Therefore, it can be said that modeling using software in this study played a key role in managing the area of hazardous materials containers.
2016
Introduction: Carwash are industries that consume large amounts of water and results wastewater that have different type of pollutents(detergents, oil and grease, metals, etc.). Enough treatment of carwash wastewater is important and could be protect surface and ground water. Therefore, in this study ozonation process was used for carwash wastewater that generated from washing the cars in Yazd. Method: The study was conducted on a laboratory scale. Samples were collected from a carwash unit. In a cylindrical pilot packed reactor (with height=1 m and internal diameter=5 cm) with plastic bed, removal rate of COD and anionic surfactants determined by method digestion and Standard chloroform extraction, respectively during the ozonation process with Two Ozone doses (0.7 and 1.1 mg per minute), 3 reaction time (30, 60 and 90 minute) and three pH (7, 9 and 11) were used. Results: The results showed that removal efficiency of COD and anionic surfactants increases with increasing pH and reaction time. At pH =11 and after a reaction time of 90 minutes for an ozone dose of 1.1 mg/min, removal efficiency of COD and anionic surfactants was %68.57 and %77.71, respectively. Conclusion: The results showed that the ozonation process in packed bed rector has significant ability to remove COD and anionic surfactants from carwash wastewater. But this process alone cannot remove organic content of carwash wastewater completely. The ozonation process can be combined with other methods as appropriate and safe method for treating carwash wastewater.
DOAJ (DOAJ: Directory of Open Access Journals), 2016
Background: The failure time of permanent tooth is of the form of interval censored since the exact time of tooth decay is not available and it is only known that tooth decay occurs between two consecutive visits. There are a few techniques available in the literature for the problem of goodnessof-fit for interval censored data. In this paper, we propose a new goodness-of-fit testing procedure for interval censored data and employ this for the failure time of the first permanent molar tooth (sixth tooth) data. Materials and Methods: Two methods of goodness-of-fit for interval censored data that are based on randomly generated data from each interval and averaging over the test statistics or over the p-values are employed for the failure time of the first permanent molar tooth data. Results: The mean of the failure time of the first permanent molar tooth is found to be at 95 months. The p-values of the two goodness-of-fit testing procedures for the Weibull, log-normal and gamma models are calculated. Conclusion: By comparing the p-values, the log-normal model is considered as the best model to describe the failure time of the first permanent molar tooth data.
Background and aim: It is necessary to state total information about the design, procedures, intervention groups in study, results for data in order to present a suitable report of controlled randomized clinical trial. This study was aimed to evaluate the quality of materials and methods for the writings of final proposal in clinical trial studies in Shahrekord University of Medical Sciences. Methods: In this descriptive-analytic study, 53 approved final proposals of controlled randomized clinical trial studies in Shahrekord University of Medical Sciences were selected from 1998 to 2013. The selection and quality of material and method writing was evaluated based on final version of consort checklist. Results: The scores mean was obtained for the quality of materials and methods writings based on the checklist 6.75±1.92. The notation of interventions in each group (%96.2), identification of primary and secondary study (%88.7), and the state of statistical ways (% 86.8) showed the most scores and the randomizing the least score (%3.8). The projects which were the student theses rather than not being thesis (p=0.011). Conclusion: Performed clinical trials in Shahrekord University of Medical Sciences aren't in a suitable report way. So, it is advised to provide a standard consort instruction and was delivered to researchers, reviewers, and statistical counselors in order to design study and report clinical trial studies.
Journal of North Khorasan University of Medical Sciences, 2015
Background & Objectives: The relationship between oral diseases and adverse outcomes of pregnancy demands more attention to oral hygiene for pregnant women. The aim of this study was to assess the effect of educational programs based on the theory of planned behavior to improving the oral health behavior of pregnant women attending urban health facilities Ashkhaneh city in 2013. Materials and Methods: This quasi-experimental study was carried out on 150 pregnant women, selected with simple sampling.(75 females of each site). Data were collected using a researcher desingend questionnaire based on the theory of planned behavior. Validity and reliability of the questionnaire was evaluated. Data was analyzed by SPSS 18 software at significance level of 0.05. Results: The most frequent samples aged between 21-25 years old. Before the intervention, the mean score of knowledge, attitude, perceived behavioral control, subjective norms, behavioral intention and performance of the intervention and control groups showed no significant difference (p>0/05). After the intervention, the average of all the scores in the intervention group showed an increase except for subjective constructions after training (p<0/05). This difference was not significant in the control group (p> 0/05). Conclusion: Using the theory of planned behavior improves oral health in the pregnant women.
Journal of Economic Geology, 2019
Introduction The Agh Ziarat (Au±Cu±Mo) Polymetallic deposit is located at 75 north of Urmia, northwestern part of the Sanandaj-Sirjan Zone. Several studies have been carried out on chemical composition, geochemistry, petrology, and petrogenesis of intrusive bodies of the Qushchi area, north of Urmia (Jahangiri, 1993; Behnia, 1996; Asadpour, 2001; Azimi, 2011; Shahabi, 2013; Sarjoughian and Kananian, 2015). However, the mineralization potential of the intrusion rocks and volcano-sedimentary sequences has not been investigated yet. The present investigation provides an overview of the geological framework, mineralogy of orebodies and gangue, geochemical, and geophysical characteristics of the Agh Ziarat deposit. Therefore, identification of mineralization style and potential in the study area can be used as an exploration guide in the regional scale in the Sanandaj-Sirjan zone and elsewhere. Materials and methods Petrography and ore mineralogy studies were carried out on 15 thin, 20 p...