The Journal of

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Introduction: One of the heavy metals is chromium which is used in trivalent and Hexavalent oxidation state in industries such as, glass, ceramic, tannery, leather especially in electroplating industries. Hexavalent Chromium has proven several health hazards such as a carcinogen. The aim of this study was to investigate the efficiency of Melia azedarach ash in the removal of hexavalent chromium from synthetic electroplating industry wastewater. Methods: This is an experimental study which investigates the effect of initial chromium concentration, adsorbent dose and reaction time on removal of chromium by Melia azedarach ash. The adsorbent was prepared in experimental conditions using electric oven in 550 0C at 2 hours and pulverized using ASTM standard sieves with a particle size range of 40–60 mesh. The study was performed on the synthetic samples containing 5and 10 mg/l concentration of chromium. The unknown concentration of Hexavalent chromium was detected by spectrophotometer set (UV/VisibleSP-3000 Plus-Japan) at 540 nm. Results: According to the results, removal efficiency increases by increasing adsorbent dose and reaction time and decreases with increasing initial concentration of chromium. Results of this study showed that Hexavalent chromium adsorption by Melia azedarach ash reaches equilibrium at 180 minutes. Conclusion: Melia azedarach ash is an effective adsorbent in removal of hexavalent chromium from synthetic electroplating industries wastewater. In addition, the use of this biosorbent in preparation and application aspects is simple and cheap compared to many other natural and man-made adsorbent.

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Introduction:Statistical data shows thatpopulation living in Fereydunshahrare declining in recent years and it should be noted that during these years the birthrate has been several times the mortality rate. Therefore decline in population is due to emigration; so this study was conducted to evaluate factors related to these emigrations in the mentioned city.
Method:This cross-sectional study has been conducted on 384 emigrants who have left Fereydunshahr from 2011 to 2015. For this purpose, after the process of sampling through telephone coordinating and in person visiting new addresses of emigrants in the destination city or village, assessment questionnaire of factors related to migration including six components (geographical and climatic factors, research and educational factors, political factors, social factors, economic factors, religious factors) was filled for them through interview.
Data was analyzed through SPSS version 20, descriptive statistics, t-tests and analysis of variance.
Results: Results from the research indicated that the most important causes related to emigration in Fereydunshahr from perspective of emigrants in order of preference are: economic factors, geographical and climatic factors, research and educational factors, social factors,political factors and religious factors. As well it was determined that there is a relation between demographic information of the emigrants and how they score the mentioned factors.
Conclusion: Due to findings and identified priorities in the research, it is required to consider required facilities in order to invest in the section ofagriculture and animal husbandry and also public transportation and convenient access roads to prevent emigration of rural population.
And also it is required in addition to improve research and educational facilities, to provide grounds of private sector participation for investment in the industry sector along with raw materials for agricultural and livestock production in the city and in accordance with geographical and climatic conditions of the region (severe cold and snowfall during cold seasons) to prevent emigration of young and reproducing population of the city. 
 

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Introduction: Students' health of is of great importance because they account for a large part of community. Schools play an important role in the transfer of health information to students. The purpose of this study was to investigate the effect of a health-based intervention on the knowledge, attitude, and practice of high school students in Mehriz city.
 
Methods:  In this semi-experimental study with pretest-posttest design, 260 first-grade high school students were studied in Mehriz city in 2016-2017. The data collection tool was five sections of the Global school-based student health survey (GHSH). The questionnaires were completed by students before and three months after the intervention. Data were analyzed by SPSS 20 using z test, t-test, ANOVA, McNemar's test, and chi-squared test.
Results: After the intervention, a significant difference was observed between the students' scores in the pre- and post- intervention steps with regard to taking milk and dairy at least twice per day, consuming vegetables, washing hands before eating in school, brushing twice or more daily, exercising for at least 60 minutes per day, and having insufficient sleep at night due to being worried about various issues (P<0.05). The intervention was also effective on the mean (±standard deviation) scores of knowledge about mental health, nutrition, and oral health, as well as mean(±standard deviation) scores of attitudes toward physical activity, oral health, and nutrition (P<0.05).
 
Conclusion: Health interventions can increase health promoting behaviors and enhance knowledge and attitudes in students. Therefore, it is recommended to use interventional programs using available facilities in schools.