جستجوی مقالات مرتبط با کلیدواژه « zinc chloride » در نشریات گروه « زیست شناسی »

Anxiety is a common disease in the society. About 500 million people worldwide suffer from this disorder. 85% of people with depression also have anxiety. According to anxiolytic effects of different zinc chloride in male and female rats is Castration post- pubertaly, this was investigated, the effect of zinc chloride on anxiety and deppresive behaviors of rats, in gonadectomized peri-pubertaly. In this experiment, fifty male rats were gonadectomized at postnatal day 21-22 and at puberty were divided into Six groups, control, sham (saline), gonadectomized (saline) and the gonadectomized groups receiving Zinc chloride 5, 10 and 20 mg/kg. Then on postnatal day 75, different doses of zinc chloride (5, 10 and 20 mg/kg; IP) were administered 30 min before the elevated plus maze and forced swimming test. The results showed in gonadectomized group (saline) anxiety did not reach to a significant criterion. Zinc chloride (20 mg/kg) significantly increase the time spent in the open arms in gonadectomized (20 mg/kg) group compared to the gonadectomized group (p

Previous studies have shown that the anxiolytic effects of different zinc chloride in male and female rats is Castration post- pubertaly. This study, the effect of zinc chloride on anxiety and deppresive behaviors of rats, in ovarectomized peri-pubertaly was investigated. In this experiment, fifty female rats were ovariectomized at postnatal day 21-22 and then on postnatal day 75, different doses of zinc chloride (0, 5, 10 and 20 mg/kg; IP) were administered 30 min before the elevated plus maze and forced swimming test. Ovarectomized significantly decreased the time spent in the open arms in ovarectomized rats compared to the sham group (p

The aim of the present study was investigated the evaluation of the Median Lethal Concentration (LC50) Toxicity of Zinc Chloride (ZnCl2) and its effect on behavioral responses of gray mullet (Mugil cephalus). For this experiment, healthy of gray mullet with mean weight 7.42 g and mean length 6.51cm were captured from the Chabahar Bay. At the first, fish were exposed to ZnCl2 at several selected concentrations 0.25, 0.5, 1, 5, 10, 15, 20, 30, 40 ppm for rang finding test, then fish exposed to four concentrations 16, 17, 18 1nd 19 mg/L of Zncl2 for LC50-96h. Experiment was carried out in triplicate and 21 fish per each treatment. Physicochemical properties of water were measured continuously throughout the experiment. The temperature, pH, dissolved oxygen and salinity were 30 ◦C, 7.75, 8.25 mgO2 L-1 and 38 ppt respectively. Number of mortality and behavioral responses of fish were recorded after 24, 48, 72 and 96 h. The behavioral changes observed in fish at the experiment period included reversal, swimming on water surface, nervous manifestations, swallowing air, rapid opening and closing of the operculum, congestion and bleeding of mouth, gills and fish fins and slow down motility change of body coloration and increased of mucus secretion. LC50 of zinc chloride value was calculated with spss and probit analysis and was determined to be 17.33 mg/L in a static bioassay test system.

In the recent years, water pollution by contaminations are increasing rapidly, the problems of aquatic pollution with heavy metals which is one of the important pollutions indicate that necessary to assess in fish as an important source of human food. The aim of this study was investigated the sub-lethal effects of zinc chloride on hepatic enzymes activity in grey mullet (Mugil Cephalus). In this study after determining the LC50, Two sub-lethal treatments of zinc chloride includes (1.73 and 3.46 mg/L) was considered that any treatment has three replications. Fish were exposed to different doses of sub-lethal for 1, 7, 14 and 21 days and the end of each period samples of liver tissue was taken. The results showed that with increasing concentration of sub-lethal levels of aspartate aminotransferase (AST), alkaline phosphatase (ALP) and alanine aminotransferase (ALT) significantly increased (P≤0.05). Also with the prolonged exposure amount of enzymes AST, AST and ALT were increased significantly (P≤0.05). Results of this research showed those hepatic enzymes as stress indicator can be important factors to the investigation of eco-toxicological changes.

Heavy metals are the important pollution which there is in the aquatic ecosystems. Today, with advances in technology have increased the pollution therefore it is important to assessment the risks. The aim of this study was acute toxicity effects of mercury chloride, lead chloride and zinc chloride in silver carp fish. In this study there were 5 treatments for lead chloride and mercury chloride and 6 treatments for zinc chloride. The average lethal concentration (LC50) of these insecticides on fish within 96 hours was determined using probit analysis. Toxicity tests at 96 hours, 100% mortality shown at 1 mg per liter concentration for mercuric chloride and 60 mg per liter concentration for lead chloride and zinc chloride. LC50 96h was for mercuric chloride 0.55±0.63, Lead chloride 39.9±0.76 and Zinc chloride on 41.1±0.20. Based on this it was concluded that mercury chloride more toxic to silver carp fish compare to lead and zinc chloride so we should prevent the entrance of such substances, specific mercury, to the aquatic ecosystems.

Introduction & Zinc is an essential element for the immune system. This element has different effects on immune system activity. On the other hand, different serum Zn levels also alter normal B-cell line and T-cell line functions. The present study was carried out to assess B cell line and T cell line tolerance to low concentration Zinc Chloride In vitro study. This experimental study was conducted at the Payame Noor University of Tehran in 2010. The B- cell line and T-cell line were exposed to 1, 5, 10, 20, 30, 40, 50, 75, 100,125, 150,175 and 200 μm (λ) of Zinc Chloride followed by incubation at 12, 24, 36, 48, 60 and 72 hrs. Viability of B- cell line (Raji) and T-cell line (molt-4) were evaluated with hemocytometer method and percentage of living cells have been considered as cellular tolerance index to cytotoxic effects of Zinc chloride. The results were analyzed by SPSS software, version 18 using T-test and Kruskal-Wallis test. In this study, the results showed Zinc chloride concentrations up to 40 μm (λ) at different incubation time points (12-72 hrs) had no effects on B cell line and T cell line viability (p> 0.05) With 50-200 μm (λ) concentrations, Zinc at different incubation time points (12-72 hrs) tolerance B cell and T cell line decreased and viability decreased significantly when compared with the control group and test groups up to 40 μm (λ) concentration (p< 0.05). All groups at different after incubation time, Zinc concentrations (50-200 μm) B cell and T cell line tolerance decreased significantly when compared with Zinc chloride concentrations up to 40 μm (λ) (p< 0.05). Zinc is necessary for the normal function of the immune system. A variety of in vitro effects of zinc on B cell line and T cell line depend on the zinc concentration. High dosages of zinc evoke negative effects on B cell line and T cell line. An excess of zinc can inhibit B- cell line and T-cell line function.