A synaptosomal model was used to evaluate in vivo effects of paraoxon on the uptake of [3H]GABA i... more A synaptosomal model was used to evaluate in vivo effects of paraoxon on the uptake of [3H]GABA in rat cerebral cortex and hippocampus. Male Wistar rats were given a single intraperitoneal injection of one of three doses of paraoxon (0.1, 0.3, or 0.7mg/kg) and acetylcholinesterase (AChE) activity in the plasma, cerebral cortex, and hippocampus was measured at 30min, 4h, and
Aims. Lactate threshold (LT), a measure of exercise capacity, is the highest oxygen uptake during... more Aims. Lactate threshold (LT), a measure of exercise capacity, is the highest oxygen uptake during exercise without developing lactic acidosis. The Gold standard method for determining LT is to measure blood lactate concentration. It is reported that in exercise Saliva lactate can be measured non-invasively in lieu of blood lactate. Methods. This study was designed to determine whether measurement of Saliva lactate can be used as an alternative for blood lactate in the chemically injured. For this purpose, 17 patients were ...
Cannabinoid neuroprotection is usually greater in vivo than in neuronal cell culture systems. To ... more Cannabinoid neuroprotection is usually greater in vivo than in neuronal cell culture systems. To the authors’ knowledge, a good in vitro culture model for the neuroprotective effects of cannabinoids does not exist. Therefore, a 3-dimensional (3D) culture system was developed to investigate the neuroprotective effects of the cannabinoid receptor agonist WIN-55,212-2 on apoptosis of differentiated PC12 cells, caused by the
Abstract: Removal of chromium can be accomplished by various methods but none of them is cost-eff... more Abstract: Removal of chromium can be accomplished by various methods but none of them is cost-effective in meeting drinking water standards. For this study, granular ferric hydroxide was used as adsorbent for removal of hexavalent chromium. Besides, the effects of changing contact time, pH and concentrations of competitive anions were determined for different amounts of granular ferric hydroxide. It was found that granular ferric hydroxide has a high capacity for adsorption of hexavalent chromium from water at pH≤ 7 and in 90 min ...
Introduction: The amount and composition of municipal waste comprise the basic information needed... more Introduction: The amount and composition of municipal waste comprise the basic information needed for the planning, operation and optimization of waste management systems. The final goal of this study was a quantitative and qualitative investigation of recycling potential of solid wastes in 22 regions of Tehran. Methods: This study was conducted in the last 9 months of 2007 in 22
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2010
The fracture behavior of titanium open foam is characterized and the R-curves of crack propagatio... more The fracture behavior of titanium open foam is characterized and the R-curves of crack propagation from pre-cracks are measured. The crack growth has been optically observed, the measured initiation toughness, JIC, has been analyzed and the effect of material morphology on the JIC is discussed. The fracture toughness was found to be dependent on the expanding crack bridging zone at
Materials and Methods: The adult male Wistar rats weighing 200-250g were divided into four groups... more Materials and Methods: The adult male Wistar rats weighing 200-250g were divided into four groups: control, lead acetate (receiving 100ppm lead acetate in drinking water), lead acetate plus ascorbic acid (receiving 100ppm lead acetate and 1g/lit ascorbic acid in drinking water) and ascorbic acid (receiving 1g/lit ascorbic acid in drinking water) groups. The animals were anaesthetized with Ketamin/Xylazine (50 and 7 mg/kg respectively ip) and systolic blood pressure was then measured from the tail of the animals by sphygmomanometer. Nitric ...
Chronic exposure to low levels of lead results in sustained hypertension in humans and experiment... more Chronic exposure to low levels of lead results in sustained hypertension in humans and experimental animals. The mechanism of lead-induced hypertension remains unclear. We investigated the short-term (4 and 8 weeks) and subchronic (12 weeks) effects of lead treatment on responsiveness of vascular adrenergic system and level of nitric oxide metabolites, that is, total nitrates and nitrites (NOx). Male Sprague-Dawley rats were treated with lead acetate (100 ppm in drinking water) for 12 weeks. Short-term lead administration resulted in marked elevation of blood pressure accompanied by significant reduction in serum NOx levels. In contrast, after subchronic lead administration the trend of decrease in NOx levels somehow reversed despite further increase in blood pressure. Both short-term and subchronic lead administration resulted in significant differences in vascular reactivity with respect to either vasoconstrictor (phenylephrine and clonidine) or vasodilator (isoproterenol) agents. We conclude that vascular adrenergic system and nitric oxide pathway change in short-term and subchronic phases of lead poisoning.
A synaptosomal model was used to evaluate in vivo effects of paraoxon on the uptake of [3H]GABA i... more A synaptosomal model was used to evaluate in vivo effects of paraoxon on the uptake of [3H]GABA in rat cerebral cortex and hippocampus. Male Wistar rats were given a single intraperitoneal injection of one of three doses of paraoxon (0.1, 0.3, or 0.7mg/kg) and acetylcholinesterase (AChE) activity in the plasma, cerebral cortex, and hippocampus was measured at 30min, 4h, and
Aims. Lactate threshold (LT), a measure of exercise capacity, is the highest oxygen uptake during... more Aims. Lactate threshold (LT), a measure of exercise capacity, is the highest oxygen uptake during exercise without developing lactic acidosis. The Gold standard method for determining LT is to measure blood lactate concentration. It is reported that in exercise Saliva lactate can be measured non-invasively in lieu of blood lactate. Methods. This study was designed to determine whether measurement of Saliva lactate can be used as an alternative for blood lactate in the chemically injured. For this purpose, 17 patients were ...
Cannabinoid neuroprotection is usually greater in vivo than in neuronal cell culture systems. To ... more Cannabinoid neuroprotection is usually greater in vivo than in neuronal cell culture systems. To the authors’ knowledge, a good in vitro culture model for the neuroprotective effects of cannabinoids does not exist. Therefore, a 3-dimensional (3D) culture system was developed to investigate the neuroprotective effects of the cannabinoid receptor agonist WIN-55,212-2 on apoptosis of differentiated PC12 cells, caused by the
Abstract: Removal of chromium can be accomplished by various methods but none of them is cost-eff... more Abstract: Removal of chromium can be accomplished by various methods but none of them is cost-effective in meeting drinking water standards. For this study, granular ferric hydroxide was used as adsorbent for removal of hexavalent chromium. Besides, the effects of changing contact time, pH and concentrations of competitive anions were determined for different amounts of granular ferric hydroxide. It was found that granular ferric hydroxide has a high capacity for adsorption of hexavalent chromium from water at pH≤ 7 and in 90 min ...
Introduction: The amount and composition of municipal waste comprise the basic information needed... more Introduction: The amount and composition of municipal waste comprise the basic information needed for the planning, operation and optimization of waste management systems. The final goal of this study was a quantitative and qualitative investigation of recycling potential of solid wastes in 22 regions of Tehran. Methods: This study was conducted in the last 9 months of 2007 in 22
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2010
The fracture behavior of titanium open foam is characterized and the R-curves of crack propagatio... more The fracture behavior of titanium open foam is characterized and the R-curves of crack propagation from pre-cracks are measured. The crack growth has been optically observed, the measured initiation toughness, JIC, has been analyzed and the effect of material morphology on the JIC is discussed. The fracture toughness was found to be dependent on the expanding crack bridging zone at
Materials and Methods: The adult male Wistar rats weighing 200-250g were divided into four groups... more Materials and Methods: The adult male Wistar rats weighing 200-250g were divided into four groups: control, lead acetate (receiving 100ppm lead acetate in drinking water), lead acetate plus ascorbic acid (receiving 100ppm lead acetate and 1g/lit ascorbic acid in drinking water) and ascorbic acid (receiving 1g/lit ascorbic acid in drinking water) groups. The animals were anaesthetized with Ketamin/Xylazine (50 and 7 mg/kg respectively ip) and systolic blood pressure was then measured from the tail of the animals by sphygmomanometer. Nitric ...
Chronic exposure to low levels of lead results in sustained hypertension in humans and experiment... more Chronic exposure to low levels of lead results in sustained hypertension in humans and experimental animals. The mechanism of lead-induced hypertension remains unclear. We investigated the short-term (4 and 8 weeks) and subchronic (12 weeks) effects of lead treatment on responsiveness of vascular adrenergic system and level of nitric oxide metabolites, that is, total nitrates and nitrites (NOx). Male Sprague-Dawley rats were treated with lead acetate (100 ppm in drinking water) for 12 weeks. Short-term lead administration resulted in marked elevation of blood pressure accompanied by significant reduction in serum NOx levels. In contrast, after subchronic lead administration the trend of decrease in NOx levels somehow reversed despite further increase in blood pressure. Both short-term and subchronic lead administration resulted in significant differences in vascular reactivity with respect to either vasoconstrictor (phenylephrine and clonidine) or vasodilator (isoproterenol) agents. We conclude that vascular adrenergic system and nitric oxide pathway change in short-term and subchronic phases of lead poisoning.
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