The thermal decomposition processes in solid state CoC2O4·2H2O have been studied in air using TG/DTA, DSC and XRD techniques. TG/DTA, DSC curves showed that the decomposition proceeded through two well-defined st...The thermal decomposition processes in solid state CoC2O4·2H2O have been studied in air using TG/DTA, DSC and XRD techniques. TG/DTA, DSC curves showed that the decomposition proceeded through two well-defined steps in air. Mass loss of the thermal decomposition of CoC2O4·2H2O was in good agreement with the theoretica1 one. XRD showed that the final product of the thermal decomposition was Co3O4. The activation energies were calculated through the ASTM E698 and Flynn-Wall-Ozawa (FWO) methods, and the possible conversion functions had been estimated through the multiple-linear regression method. The activation energies for the two steps decomposition of CoC2O4·2H2O were 140.18 kJ·mol-1 and 134.61 kJ·mol-1, respective1y.展开更多
文摘病例资料患者,女,28岁,主诉腹部渐进性膨隆一年余,腰痛3个月入院。患者无腹痛、腹胀、恶心呕吐症状,大小便正常,入院前外院超声提示腹盆腔巨大占位,遂转入我院。入院后查体：神志清,发育正常,口鼻三角区多发淡棕色蜡状丘疹,呈蝶翼状分布,触之较硬,无瘙痒、疼痛感;腹部明显膨隆。血尿常规、肝肾功能正常。否认家族中有类似病史。CT表现：双侧侧脑室室管膜下及左侧小脑半球多发钙化灶,多位于侧脑室外侧壁和室间孔附近（图1）。双肺多发薄壁透亮影,界清,直径1~10 mm,
文摘The thermal decomposition processes in solid state CoC2O4·2H2O have been studied in air using TG/DTA, DSC and XRD techniques. TG/DTA, DSC curves showed that the decomposition proceeded through two well-defined steps in air. Mass loss of the thermal decomposition of CoC2O4·2H2O was in good agreement with the theoretica1 one. XRD showed that the final product of the thermal decomposition was Co3O4. The activation energies were calculated through the ASTM E698 and Flynn-Wall-Ozawa (FWO) methods, and the possible conversion functions had been estimated through the multiple-linear regression method. The activation energies for the two steps decomposition of CoC2O4·2H2O were 140.18 kJ·mol-1 and 134.61 kJ·mol-1, respective1y.
