The contribution of cinnamon extract on leaching of aluminum (Al) cook wares was investigated using two aluminum alloys (Indian and Egyptian) and pure Al. The cinnamon (Cin) was extracted by heating the Cin sticks at ...The contribution of cinnamon extract on leaching of aluminum (Al) cook wares was investigated using two aluminum alloys (Indian and Egyptian) and pure Al. The cinnamon (Cin) was extracted by heating the Cin sticks at 90°C in distilled water for an hour to make the 10% stock solution. This study was done in aqueous solutions in presence and absence of 1% NaCl using weight loss at 90°C. Moreover surface study (SEM and EDX) and electrochemical methods (Open Circuit Potential and Tafel plot) were applied. The addition of Cin solutions to 1% NaCl decreased the corrosion rates in weight loss and electrochemical method compared to 1% NaCl solutions which showed an inhibitive property of Cin solution. The inhibition was found to obey the modified Langmuir isotherm with a negative Langmuir ΔGads indicating the spontaneous nature of adsorption even at 90°C. The EDX surface analysis of the Al surface immersed in Cin + NaCl revealed the composition of the pits formed. From Tafel method, it was found that the corrosion current density of pure Al was more than that of the Egyptian alloy. The apparent activation energy values for Cin, Cin + NaCl and NaCl solution were evaluated and discussed.展开更多
滤泡辅助性T细胞(Follicular helper CD4 T cells,Tfh)是重要的CD4^(+)T淋巴细胞亚群之一,与多种疾病的发生和发展密切相关,其参与疾病发生的机制尚有待深入研究。该研究将分离小鼠脾脏细胞,应用贝克曼Moflo分选系统分选出CD4^(+)T淋巴...滤泡辅助性T细胞(Follicular helper CD4 T cells,Tfh)是重要的CD4^(+)T淋巴细胞亚群之一,与多种疾病的发生和发展密切相关,其参与疾病发生的机制尚有待深入研究。该研究将分离小鼠脾脏细胞,应用贝克曼Moflo分选系统分选出CD4^(+)T淋巴细胞。使用细胞因子刺激Tfh细胞分化并检测其分化比例,同时采用流式细胞术检测和分析肉桂活性成分对滤泡辅助性T细胞分化的影响。结果表明,贝克曼Moflo XDP分选系统可以显著提高CD4^(+)T淋巴细胞的纯度,且肉桂活性成分可以显著抑制Tfh细胞分化。为新药在Tfh细胞的开发提供一定实验基础,并且为研发肉桂作为新的增强免疫疗效药物提供可靠的实验依据。展开更多
文摘The contribution of cinnamon extract on leaching of aluminum (Al) cook wares was investigated using two aluminum alloys (Indian and Egyptian) and pure Al. The cinnamon (Cin) was extracted by heating the Cin sticks at 90°C in distilled water for an hour to make the 10% stock solution. This study was done in aqueous solutions in presence and absence of 1% NaCl using weight loss at 90°C. Moreover surface study (SEM and EDX) and electrochemical methods (Open Circuit Potential and Tafel plot) were applied. The addition of Cin solutions to 1% NaCl decreased the corrosion rates in weight loss and electrochemical method compared to 1% NaCl solutions which showed an inhibitive property of Cin solution. The inhibition was found to obey the modified Langmuir isotherm with a negative Langmuir ΔGads indicating the spontaneous nature of adsorption even at 90°C. The EDX surface analysis of the Al surface immersed in Cin + NaCl revealed the composition of the pits formed. From Tafel method, it was found that the corrosion current density of pure Al was more than that of the Egyptian alloy. The apparent activation energy values for Cin, Cin + NaCl and NaCl solution were evaluated and discussed.
