目的设计一种基于逐口气法的人体能量代谢检测系统,以实现人体能量代谢的实时准确测量。方法首先,采用间接测热法实时采集人体每口呼吸气的流量和浓度信息;然后,通过特征对齐和每口气数据分割计算氧气消耗量(QO_(2))、二氧化碳产生量(QC...目的设计一种基于逐口气法的人体能量代谢检测系统,以实现人体能量代谢的实时准确测量。方法首先,采用间接测热法实时采集人体每口呼吸气的流量和浓度信息;然后,通过特征对齐和每口气数据分割计算氧气消耗量(QO_(2))、二氧化碳产生量(QCO_(2));最后,根据Weir公式计算人体能量代谢指标。另外,该文还开展了与国际先进代谢测量设备MGC ULTIMA SYSTEM PFX CARDIO_(2)的对比验证实验。结果该系统测量的代谢指标数据均落在Bland-Altman分析的一致性区间内。结论该系统与MGC的测量结果具有较高的一致性,可以实时准确测量人体能量代谢,为临床营养评估及诊疗提供数据支撑。展开更多
An atmospheric-pressure air plasma is employed to treat C6 glioma cells in vitro. To elucidate on the mechanism causing cell death and role of reactive species （RS） in the medium produced by the plasma, the concentr...An atmospheric-pressure air plasma is employed to treat C6 glioma cells in vitro. To elucidate on the mechanism causing cell death and role of reactive species （RS） in the medium produced by the plasma, the concentration of the long-lived RS such as hydrogen peroxide, nitrate, and ozone in the plasma-treated liquid （phosphate-buffered saline solution） is measured. When vitamin C is added to the medium as a ROS quencher, the viability of C6 glioma cells after the plasma treatment is different from that without vitamin C. The results demonstrate that reactive oxygen species （ROS） such as H2O2, and O3 constitute the main factors for inactivation of C6 glioma cells and the reactive nitrogen species （RNS） may only play an auxiliary role in cell death.展开更多
文摘目的设计一种基于逐口气法的人体能量代谢检测系统,以实现人体能量代谢的实时准确测量。方法首先,采用间接测热法实时采集人体每口呼吸气的流量和浓度信息;然后,通过特征对齐和每口气数据分割计算氧气消耗量(QO_(2))、二氧化碳产生量(QCO_(2));最后,根据Weir公式计算人体能量代谢指标。另外,该文还开展了与国际先进代谢测量设备MGC ULTIMA SYSTEM PFX CARDIO_(2)的对比验证实验。结果该系统测量的代谢指标数据均落在Bland-Altman分析的一致性区间内。结论该系统与MGC的测量结果具有较高的一致性,可以实时准确测量人体能量代谢,为临床营养评估及诊疗提供数据支撑。
基金jointly supported by the Education and Research Foundation of Anhui Province(KJ2015A327)Science Foundation of Institute of Plasma Physics,Chinese Academy of Sciences No.DSJJ-14-YY02Hong Kong Research Grants Council(RGC)General Research Funds(GRF)No.CityU 11301215
文摘An atmospheric-pressure air plasma is employed to treat C6 glioma cells in vitro. To elucidate on the mechanism causing cell death and role of reactive species （RS） in the medium produced by the plasma, the concentration of the long-lived RS such as hydrogen peroxide, nitrate, and ozone in the plasma-treated liquid （phosphate-buffered saline solution） is measured. When vitamin C is added to the medium as a ROS quencher, the viability of C6 glioma cells after the plasma treatment is different from that without vitamin C. The results demonstrate that reactive oxygen species （ROS） such as H2O2, and O3 constitute the main factors for inactivation of C6 glioma cells and the reactive nitrogen species （RNS） may only play an auxiliary role in cell death.
