[Effect of different levels of dietary nucleotides on osmoregulation of pyloric caeca in Caspian sea salmon [Salmo trutta caspius]]

Nucleotides are considered as cellular component which do regulatory effect and key function in all biological process. The aim of the present study was to investigate the effect of dietary nucleotide intake on osmoregulatory function of pyloric caeca in juvenile salmon of Caspian sea. This experiment was done in two levels of dietary nucleotide [0.25% and 0.5%] and a control group [0%] for 8 weeks. After then, 12 fishes from each treated group were transferred into saline water [18 ppt]. 72 hours later, fishes were fixed for histological and immunohistochemical studies. Histological studies were done by Hematoxiline-Fushin staining and light microscope. Immunolocalization of Na[+], K[+] -ATPase was done by fluorescent microscope. Results showed that in all samples immunofluorescence of Na[+], K[+]- ATPase can be seen in the baso-lateral parts of pyloric ceaca entrocytes. Treated groups showed higher fluorescence compared to the control. In this respect 0.5% group showed the highest values for immunofluorescence of Na[+], K[+] - ATPase. Alternation in Na[+], K[+] -ATPase values of epithelial pyloric caeca in response to dietary nucleodtides intake can be attributed to its role in adaptation of fish to 18 ppt saline

[Investigating relationship between satisfaction with life and social support with mental health among freshman students of Tehran university]

The purpose of this study was investigating the relationship between satisfaction with life and social support with mental health among freshman students of Tehran university. Subjects were all statistical universe, 3261 students [1248 male and 2012 female] completed the following relevant scale: demographic questionnaire, general mental health questionnaire, satisfaction with life and social support scale administered to assess satisfaction with life, social support and mental health. The results showed that satisfaction with life and social support was significantly predicted mental health and also marriage significantly correlated with higher mental health, more satisfaction with life and more social support feeling. Generally, based on some variables such as indicators of satisfaction with life, social support and many demographic features, we can identify vulnerable and at-risk students