Fisheries
Elham Abdzadeh; Fatemeh Nazarhaghighi
Articles in Press, Accepted Manuscript, Available Online from 02 December 2013
Abstract
To evaluate the levels of cortisol, glucose and other possible indicators of goldfish ,Carassius auratus, in response to stress, in the first experiment, Bisphenol A (0.5 mg/L), Naphthalene (200 μg/L) and Butachlor (60%) (0.28 µg/L) were added to the aquariums water for two weeks. In the second experiment, ...
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To evaluate the levels of cortisol, glucose and other possible indicators of goldfish ,Carassius auratus, in response to stress, in the first experiment, Bisphenol A (0.5 mg/L), Naphthalene (200 μg/L) and Butachlor (60%) (0.28 µg/L) were added to the aquariums water for two weeks. In the second experiment, intra-peritoneal injections of Bisphenol A, Naphthalene and Butachlor,with dose 50 mg/kg, 50 mg/kg, 20 μL on the body weight of fish were performed. On the fifth day and the end of the experiment (fifteenth day) as well as 48 hours after injection, blood sampling from caudal vein was taken and levels of cortisol, glucose, total protein and blood plasma were measured inorganic phosphorous. The results showed that the cortisol and glucose levels on day 5, there was a significant difference between control and Butachlor treatments (P 0.05). Comparing the results of the analysis of blood plasma in the fifth and fifteenth days of experiment, it was found that levels of cortisol and glucose in the treatment Butachlor had significantly different together within two periods (P
Medical physiology
Sima Nasri; Mohammad Oraki; Nadereh Amin
Abstract
Aging is a natural process and increase of age in synchronized societies is associated with behavioral and physiological challenges. The most important of these challenges are the three indicators of perceived stress, depression and cortisol hormone. This research was conducted to compare levels of cortisol ...
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Aging is a natural process and increase of age in synchronized societies is associated with behavioral and physiological challenges. The most important of these challenges are the three indicators of perceived stress, depression and cortisol hormone. This research was conducted to compare levels of cortisol hormone with perceived stress and depression in elderly women living in private old people’s homes and private houses in Tehran. The statistical population included elderly women aged between 65 to 75 years old that were residents of the private old people’s homes and private houses in Tehran. Data were collected by the Beck Depression Inventory, Perceived Stress Scale developed by Sheldon Cohen, and determination of serum cortisol levels in the laboratory. The results of this study showed that levels of cortisol hormone and depression in elderly women living in the private old people’s homes and private houses had a significant difference (p <0.05). The perceived stress variable had no significant difference. The difference in depression rate may be due to family relationships and the presence of family members at the private houses, and non-existence of difference in the perceived stress rate and its inverse ratio with increase of age may be due to the experience and credibility of events in the world. Considering the impact of the living environment on the psychological problems in the elderly, national measures should be taken to improve the quality of life of the elderly and to empower them through social and governmental movements.
A Mir-Aali; A A. Movahedi-Nia; R Abdi; Salati M. P.
Volume 3, Issue 1 , January 2015, , Pages 59-64
Abstract
Abstract 144 juvenile Sobaity, Sparidentex hasta, after acclimation to laboratory conditions and sea water (40ppt) for one week, sea water was used with different salinities (5, 20 and 60ppt) and seawater (40ppt) as control. Samplings were performed at 6 and 12 hours, 1, 2, 7 and 14 days after the time ...
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Abstract 144 juvenile Sobaity, Sparidentex hasta, after acclimation to laboratory conditions and sea water (40ppt) for one week, sea water was used with different salinities (5, 20 and 60ppt) and seawater (40ppt) as control. Samplings were performed at 6 and 12 hours, 1, 2, 7 and 14 days after the time of changing in environmental salinities. Blood samples were collected for plasma cortisol, glucose and electrolytes analysis. According to the results, plasma levels of cortisol showed significant increases in 5 and 60 ppt environment in relation to control and 20ppt groups 12 hours from the beginning of the experiment. However in 24h samples up to the end of the experiment (14days) there were no significant differences among treatments. Plasma glucose levels showed a significant increase only at 12h sampling time in relation to 6 and 24hours in fish adapted to 5 and 60ppt. Plasma Ca++ concentrations had no significant changes during experiment. Plasma Mg++ amounts decreased significantly in 5 and 20 ppt groups in relation with control at 24 h sampling time. In conclusion, cortisol has important role in adaptation to both 5 and 60ppt at the beginning of the exposure, because of its significant increase at just 12 hours in 5 and 60 ppt than the controls, but the role of cortisol has been replaced with other changes in osmoregulatory related tissues and cells according to the plasma cortisol amounts in 5 and 60ppt that returned to the basic levels.
