The Experts below are selected from a list of 177 Experts worldwide ranked by ideXlab platform
Pakawadee Sutthivaiyakit - One of the best experts on this subject based on the ideXlab platform.
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Tryptamine as a corrosion inhibitor of mild steel in hydrochloric acid solution
Corrosion Science, 2010Co-Authors: Pongsak Lowmunkhong, Dusit Ungthararak, Pakawadee SutthivaiyakitAbstract:Abstract The inhibitor effect of Tryptamine on the corrosion of mild steel in 0.5 M hydrochloric acid at 30 °C was investigated using linear polarization, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The inhibition efficiency increases with an increase in concentration of Tryptamine. At 500 ppm Tryptamine the inhibition efficiency calculated by these techniques is around 97%. Cathodic and anodic polarization curves of mild steel in the presence of different concentrations of Tryptamine at 30 °C reveal that it is a mixed type inhibitor. Tryptamine follows Langmuir adsorption with adsorption free energy of −35.07 kJ mol −1 .
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Tryptamine as a corrosion inhibitor of mild steel in hydrochloric acid solution
Corrosion Science, 2010Co-Authors: Pongsak Lowmunkhong, Dusit Ungthararak, Pakawadee SutthivaiyakitAbstract:Abstract The inhibitor effect of Tryptamine on the corrosion of mild steel in 0.5 M hydrochloric acid at 30 °C was investigated using linear polarization, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The inhibition efficiency increases with an increase in concentration of Tryptamine. At 500 ppm Tryptamine the inhibition efficiency calculated by these techniques is around 97%. Cathodic and anodic polarization curves of mild steel in the presence of different concentrations of Tryptamine at 30 °C reveal that it is a mixed type inhibitor. Tryptamine follows Langmuir adsorption with adsorption free energy of −35.07 kJ mol −1 .
Kazuyoshi Horisaka - One of the best experts on this subject based on the ideXlab platform.
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Inhibitory effects of Tryptamine on tolbutamide-induced hypoglycemia in mice: mediation by 5-HT receptors.
Neurochemical research, 1994Co-Authors: Yumi Sugimoto, Ikuko Kimura, Yoshiko Watanabe, Jun Yamada, Kazuyoshi HorisakaAbstract:Effects of Tryptamine on tolbutamide-induced hypoglycemia were investigated in mice. Tryptamine significantly inhibited hypoglycemia elicited by tolbutamide. The inhibitory effects of Tryptamine were strongly blocked by the 5-HT1 and 5-HT2 receptor antagonist methysergide and the 5-HT2 receptor antagonist ketanserin, while the 5-HT3 receptor antagonist ICS 205–930 was without effect. Tryptamine induced hyperglucagonemia in tolbutamide-treated mice, and this effect elicited by Tryptamine was strongly inhibited by the 5-HT2 receptor antagonist ketanserin. These results suggest that the inhibitory effects of Tryptamine on tolbutamide-induced hypoglycemia are mediated by 5-HT2 receptors and that Tryptamine is involved in glucagon release.
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Hyperglucagonemia induced in mice by Tryptamine: Involvement of the peripheral 5-HT2 receptors
European Journal of Pharmacology, 1992Co-Authors: Jun Yamada, Ikuko Kimura, Naoko Takeuchi, Yoshiko Watanabe, Yumi Sugimoto, Kazuyoshi HorisakaAbstract:Abstract The effects of an indoleamine, Tryptamine, on plasma glucagon levels were investigated in mice. Tryptamine induced dose-related increases in plasma glucagon levels. The hyperglucagonemic effects of Tryptamine were completely antagonized by methysergide and ketanserin which have a high affinity to 5-HT2 receptors. In addition, the peripheral 5-HT2 receptor antagonist, xylamidine, also strongly inhibited Tryptamine-induced hyperglucagonemia. Our results indicate that the peripheral 5-HT2 receptors mediate the increase in plasma glucagon levels induced by Tryptamine and that these receptors may have a role in the control of glucagon secretion.
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The involvement of insulin in Tryptamine-induced hypoglycemia in mice.
Life sciences, 1991Co-Authors: Yumi Sugimoto, Ikuko Kimura, Naoko Takeuchi, Yoshiko Watanabe, Jun Yamada, Kazuyoshi HorisakaAbstract:The effects of Tryptamine on plasma glucose and serum insulin levels were studied in mice. Tryptamine elicited dose-dependent hypoglycemia and hyperinsulinemia in intact mice. In streptozotocin-diabetic mice, Tryptamine did not change plasma glucose nor serum insulin levels. Tryptamine significantly inhibited glucose-induced hyperglycemia and enhanced insulin release elicited by glucose. These results indicate that Tryptamine-induced hypoglycemia is brought on by its releasing effects of insulin.
Pongsak Lowmunkhong - One of the best experts on this subject based on the ideXlab platform.
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Tryptamine as a corrosion inhibitor of mild steel in hydrochloric acid solution
Corrosion Science, 2010Co-Authors: Pongsak Lowmunkhong, Dusit Ungthararak, Pakawadee SutthivaiyakitAbstract:Abstract The inhibitor effect of Tryptamine on the corrosion of mild steel in 0.5 M hydrochloric acid at 30 °C was investigated using linear polarization, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The inhibition efficiency increases with an increase in concentration of Tryptamine. At 500 ppm Tryptamine the inhibition efficiency calculated by these techniques is around 97%. Cathodic and anodic polarization curves of mild steel in the presence of different concentrations of Tryptamine at 30 °C reveal that it is a mixed type inhibitor. Tryptamine follows Langmuir adsorption with adsorption free energy of −35.07 kJ mol −1 .
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Tryptamine as a corrosion inhibitor of mild steel in hydrochloric acid solution
Corrosion Science, 2010Co-Authors: Pongsak Lowmunkhong, Dusit Ungthararak, Pakawadee SutthivaiyakitAbstract:Abstract The inhibitor effect of Tryptamine on the corrosion of mild steel in 0.5 M hydrochloric acid at 30 °C was investigated using linear polarization, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The inhibition efficiency increases with an increase in concentration of Tryptamine. At 500 ppm Tryptamine the inhibition efficiency calculated by these techniques is around 97%. Cathodic and anodic polarization curves of mild steel in the presence of different concentrations of Tryptamine at 30 °C reveal that it is a mixed type inhibitor. Tryptamine follows Langmuir adsorption with adsorption free energy of −35.07 kJ mol −1 .
Yumi Sugimoto - One of the best experts on this subject based on the ideXlab platform.
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Inhibitory effects of Tryptamine on tolbutamide-induced hypoglycemia in mice: mediation by 5-HT receptors.
Neurochemical research, 1994Co-Authors: Yumi Sugimoto, Ikuko Kimura, Yoshiko Watanabe, Jun Yamada, Kazuyoshi HorisakaAbstract:Effects of Tryptamine on tolbutamide-induced hypoglycemia were investigated in mice. Tryptamine significantly inhibited hypoglycemia elicited by tolbutamide. The inhibitory effects of Tryptamine were strongly blocked by the 5-HT1 and 5-HT2 receptor antagonist methysergide and the 5-HT2 receptor antagonist ketanserin, while the 5-HT3 receptor antagonist ICS 205–930 was without effect. Tryptamine induced hyperglucagonemia in tolbutamide-treated mice, and this effect elicited by Tryptamine was strongly inhibited by the 5-HT2 receptor antagonist ketanserin. These results suggest that the inhibitory effects of Tryptamine on tolbutamide-induced hypoglycemia are mediated by 5-HT2 receptors and that Tryptamine is involved in glucagon release.
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Hyperglucagonemia induced in mice by Tryptamine: Involvement of the peripheral 5-HT2 receptors
European Journal of Pharmacology, 1992Co-Authors: Jun Yamada, Ikuko Kimura, Naoko Takeuchi, Yoshiko Watanabe, Yumi Sugimoto, Kazuyoshi HorisakaAbstract:Abstract The effects of an indoleamine, Tryptamine, on plasma glucagon levels were investigated in mice. Tryptamine induced dose-related increases in plasma glucagon levels. The hyperglucagonemic effects of Tryptamine were completely antagonized by methysergide and ketanserin which have a high affinity to 5-HT2 receptors. In addition, the peripheral 5-HT2 receptor antagonist, xylamidine, also strongly inhibited Tryptamine-induced hyperglucagonemia. Our results indicate that the peripheral 5-HT2 receptors mediate the increase in plasma glucagon levels induced by Tryptamine and that these receptors may have a role in the control of glucagon secretion.
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The involvement of insulin in Tryptamine-induced hypoglycemia in mice.
Life sciences, 1991Co-Authors: Yumi Sugimoto, Ikuko Kimura, Naoko Takeuchi, Yoshiko Watanabe, Jun Yamada, Kazuyoshi HorisakaAbstract:The effects of Tryptamine on plasma glucose and serum insulin levels were studied in mice. Tryptamine elicited dose-dependent hypoglycemia and hyperinsulinemia in intact mice. In streptozotocin-diabetic mice, Tryptamine did not change plasma glucose nor serum insulin levels. Tryptamine significantly inhibited glucose-induced hyperglycemia and enhanced insulin release elicited by glucose. These results indicate that Tryptamine-induced hypoglycemia is brought on by its releasing effects of insulin.
Dusit Ungthararak - One of the best experts on this subject based on the ideXlab platform.
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Tryptamine as a corrosion inhibitor of mild steel in hydrochloric acid solution
Corrosion Science, 2010Co-Authors: Pongsak Lowmunkhong, Dusit Ungthararak, Pakawadee SutthivaiyakitAbstract:Abstract The inhibitor effect of Tryptamine on the corrosion of mild steel in 0.5 M hydrochloric acid at 30 °C was investigated using linear polarization, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The inhibition efficiency increases with an increase in concentration of Tryptamine. At 500 ppm Tryptamine the inhibition efficiency calculated by these techniques is around 97%. Cathodic and anodic polarization curves of mild steel in the presence of different concentrations of Tryptamine at 30 °C reveal that it is a mixed type inhibitor. Tryptamine follows Langmuir adsorption with adsorption free energy of −35.07 kJ mol −1 .
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Tryptamine as a corrosion inhibitor of mild steel in hydrochloric acid solution
Corrosion Science, 2010Co-Authors: Pongsak Lowmunkhong, Dusit Ungthararak, Pakawadee SutthivaiyakitAbstract:Abstract The inhibitor effect of Tryptamine on the corrosion of mild steel in 0.5 M hydrochloric acid at 30 °C was investigated using linear polarization, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The inhibition efficiency increases with an increase in concentration of Tryptamine. At 500 ppm Tryptamine the inhibition efficiency calculated by these techniques is around 97%. Cathodic and anodic polarization curves of mild steel in the presence of different concentrations of Tryptamine at 30 °C reveal that it is a mixed type inhibitor. Tryptamine follows Langmuir adsorption with adsorption free energy of −35.07 kJ mol −1 .
