Journal of School of Public Health and

Background and Aim: The objective of this study was to determine the contents of heavy metals Hg, Cd and Pb in the muscle, liver and gill tissues of Liza abu fish in the Dez and Bahmanshir Rivers in Khoozestan Province, Iran in winter 2010. 

Materials and Methods: The study included 108 samples of Liza abu tissues. The metals were extracted from the tissues using the wet-digestion method and their concentrations were determined by atomic absorption spectrophotometer Perkin Elmer 4100. Analysis of the data was done using the SPSS17 software, the statistical test being the t-test ((p≤0.05).). 

Results: The highest concentrations (mg/Kg) of Hg (0.029±0.005), Cd (0.506±0.047) and Pb (1.07±0.096) were found in the gill and their lowest concentrations, 0.023±0.001, 0.346±0.040 and 0.903±0.030, respectively, in the muscle. The concentrations of Cd in the gull, muscle and liver were significantly different (p≤0.05) between the Dez and Bahmanshir River fish samples, but the differences with regard to Hg and Pb concentrations were not different between the 2 rivers (p≥0.05). 

Conclusion: The mercury content of Liza abu tissues was lower, while the lead and cadmium contents were higher, than the respective WHO standards (permitted levels).

Background and Aim: This study aimed to investigate the association of Internet addiction and self-control with mental health among students of the University of Applied Sciences and Technology (UAST) in Ilam city, Iran.

Materials and Methods: Data collection tools included the Mental Health Goldenberg scale, Tanji Self-control Inventory and Young Internet Addiction questionnaires. The sample consisted of 101 UAST students in Ilam City, Iran.

Results: Analysis of the data showed a statistically significant negative relationship between internet addiction and mental health and a positive association between self-control and mental health in male- and female-students.

Conclusion: It can be concluded that he more a student uses the Internet, the more likely he/she is to be less healthy mentally, while if a student has more self-control, he/she is more likely to be healthier mentally.The use of the Internet among the new generation in the society is spreading, becoming an important part of life. It has been said that teenagers are at a high risk. Hence the responsible authorities should consider mental health as a factor preventing extreme behavior of young people.