差示扫描量热研究水稻线粒体能量释放动力学

线粒体是细胞的一个重要的亚细胞器．它通过呼吸作用为细胞各项活动提供能量，有细胞'动力戒'之称．生物摄取的食物通过代谢分解形成小分子产物之后，被输送至线粒体，经过氧化作用将其中贮存的能量逐步释放出来，并转化为三磷酸腺苦（ATP）以供生命机体各种活动的需要，因而它

Study on the Kinetics of the Energy Liberation of Rice Mitochondria by Means of Differential Scanning Calorimetry

Thermodynamic and kinetic behaviour of the energy liberation of the mitochondria isolated from Guangchong 41 and Maxie fertile lines of rice during heat treatment were studied by using a Dupont 910 differential scanning calorimeter & 9900 Computer/Thermal analyzer system over he temperature range 273.12-353.12K. The DSC curves of the rice mitochondria were obtained. All the curves manifest themselves exothermic peaks, the exothermic peak curve are of the same type on the whole, but their thermodynamic values are different from each other. The exothermic peaks can be regarded as energy liberation peaks of the rice mitochondria in the heating processes. The temperature variation of the thermodynamic values and the apparent kinetic parameters of the energy liberation of rice mitochondria were calculated. The results indicate that the energy liberation of the Guangchong 41 rice mitochondria is easier than that of the Maxie rice mitochondria, but the mechanism of the energy liberation of the Guangchong 41 rice mitochondria is more complicated than that, of the Maxie rice mitochondria in the heating process.