Plasma membrane vesicles of chrysanthemum ( Dendranthema morifolium (Ramat.) Tzvel.) callus was purified by sucrose gradient centrifugation to investigate the influence of sound stimulation on the lipid physical st...Plasma membrane vesicles of chrysanthemum ( Dendranthema morifolium (Ramat.) Tzvel.) callus was purified by sucrose gradient centrifugation to investigate the influence of sound stimulation on the lipid physical states and metabolism of plasma membrane. The results showed that sound stimulation decreased the content of phosphodiesters and the fluorescent intensity of DPH, but increased the light scattering value of the membrane, the fluorescent intensity of MC540 and the content of phosphomonoesters, indicating that the vesicles got looser, the charge density and hydrophobicity of membrane surface decreased under sound stimulation of some strength and frequency. However, the membrane fluidity increased under the condition. Meanwhile, the anabolism of membrane lipid increased and the catabolism decreased. It can be seen that the physical state and metabolism of membrane lipid is sensitive to sound stimulation.展开更多
胃肠道手术后患者如有因肿瘤引起的狭窄性吞咽困难以及术后胃排空障碍,就容易发生吻合口瘘,造成死亡率的增加。考虑手术后可能5d以上无法进食者,应进行适当的肠外营养支持,支持的目的不是单纯维持术后患者氮平衡,保持患者的瘦体组...胃肠道手术后患者如有因肿瘤引起的狭窄性吞咽困难以及术后胃排空障碍,就容易发生吻合口瘘,造成死亡率的增加。考虑手术后可能5d以上无法进食者,应进行适当的肠外营养支持,支持的目的不是单纯维持术后患者氮平衡,保持患者的瘦体组织(lean body mass),而是为维护脏器、组织和免疫功能,促进脏器组织的修复,加速患者的康复。肠外营养支持的内容在肝、肾功能正常时可考虑标准配方,能量每日15~20kcal/kg,其中40%~50%由脂肪供能,但一般不超过1.0g/kg,同时应监测血胆红素水平与血脂代谢状态,注意脂肪廓清。展开更多
文摘Plasma membrane vesicles of chrysanthemum ( Dendranthema morifolium (Ramat.) Tzvel.) callus was purified by sucrose gradient centrifugation to investigate the influence of sound stimulation on the lipid physical states and metabolism of plasma membrane. The results showed that sound stimulation decreased the content of phosphodiesters and the fluorescent intensity of DPH, but increased the light scattering value of the membrane, the fluorescent intensity of MC540 and the content of phosphomonoesters, indicating that the vesicles got looser, the charge density and hydrophobicity of membrane surface decreased under sound stimulation of some strength and frequency. However, the membrane fluidity increased under the condition. Meanwhile, the anabolism of membrane lipid increased and the catabolism decreased. It can be seen that the physical state and metabolism of membrane lipid is sensitive to sound stimulation.
文摘胃肠道手术后患者如有因肿瘤引起的狭窄性吞咽困难以及术后胃排空障碍,就容易发生吻合口瘘,造成死亡率的增加。考虑手术后可能5d以上无法进食者,应进行适当的肠外营养支持,支持的目的不是单纯维持术后患者氮平衡,保持患者的瘦体组织(lean body mass),而是为维护脏器、组织和免疫功能,促进脏器组织的修复,加速患者的康复。肠外营养支持的内容在肝、肾功能正常时可考虑标准配方,能量每日15~20kcal/kg,其中40%~50%由脂肪供能,但一般不超过1.0g/kg,同时应监测血胆红素水平与血脂代谢状态,注意脂肪廓清。