シン オオサカダイガク ゼンガク IT ニンショウ キバンシステム ノ コウチク

2010年11月11日に名古屋大学にて開催された、第32回「全国共同利用情報基盤センター研究開発連合発表講演会」にて発表された論文

Dephosphorization of Carbon-Saturated Iron Containing Chromium by CaO-CaCl_2 Flux

Dephosphorization of carbon-saturated iron containing chromium was studied by the use of CaO-CaCl_2 flux. In parts of experiments, reduction of slag after dephosphorization treatment was studied by the use of graphite or ferro-silicon. Carbon-saturated iron containing chromium was dephosphorized by CaO-CaCl_2 flux with a few chromium oxidation losses. CaCr_2O_4 was identified as a chromium compound from the results of X-ray diffraction of slag. The favorable flux composition for dephosphorization of metal with about 18%Cr was 40% CaO-60%CaCl_2. When slag after dephosphorization treatment was reduced by graphite, chromium oxide in slag was reduced by about 40%, however, no rephosphorization occurred. When slag was reduced by ferro-silicon, rephosphorization occurred remarkably

Study on extraction technology of volatile oil from cortex phellodendri by supercritical carbon dioxide

使用超临界二氧化碳技术对经过超声-微波处理过的黄柏中的挥发油进行萃取,并对萃取工艺进行响应面优化。在单因素预实验的基础上,以萃取压力、萃取温度、萃取时间为响应因素,黄柏挥发油的萃取量为响应值,根据中心组合(bOX-bEHnkEn)实验设计原理,采用三因素三水平的响应面分析法,确定各工艺条件对萃取量的影响,并用扫描电子显微镜(SEM)对萃取前、未超声-微波处理超临界萃取后及超声-微波处理超临界萃取后的黄柏进行比较观察,对萃取效果进行了微观解释。结果表明,经过超声-微波处理过的黄柏中的挥发油超临界二氧化碳萃取最佳工艺条件为:萃取压力为34MPA,萃取温度为41℃,萃取时间为66MIn,萃取率达6.03%。The supercritical carbon dioxide extraction of volatile oil from processed cortex phellodendri was optimized by response surface methodology(RSM).According to the principle of Box-Behnken central composite design,extraction pressure,extraction temperature,extraction time were chosen as response factors,extraction mass was chosen as response value,and a three-factor and three level central composite design was adopted to determine the influence of various technological conditions.Using SEM observed the cortex phellodendri before and after extraction,and explained the extraction effects from microcosmic aspect.The results showed that the optimum extraction conditions were as follows:extraction pressure 34MPa,extraction temperature 41℃,extraction time 66min,extraction yield was 6.03%.湖南省科技厅重大专项(2008FJ1007);2010年吉首大学大学生研究性学习与创新性实验计划项目(JSU-CX-2010-49