试验主要研究了野生灰条菜中维生素C提取工艺及其抗氧化活性。通过响应面分析法确定灰条菜中维生素C提取的最佳工艺条件,即超声波功率为276 W,超声波时间为40 min,提取温度为40℃,液料比值为11 m L/g。同时试验结果表明,灰条菜维生素C...试验主要研究了野生灰条菜中维生素C提取工艺及其抗氧化活性。通过响应面分析法确定灰条菜中维生素C提取的最佳工艺条件,即超声波功率为276 W,超声波时间为40 min,提取温度为40℃,液料比值为11 m L/g。同时试验结果表明,灰条菜维生素C对羟自由基和超氧阴离子自由基具有较强清除能力,因此,灰条菜中维生素C具有较强的抗氧化活性。展开更多
Based on the hydro-geological conditions of 1028 mining face in Suntuan Coal Mine, mining seepage strain mechanism of seam floor was simulated by a nonlinear coupling method, which applied fluid-solid coupling analysi...Based on the hydro-geological conditions of 1028 mining face in Suntuan Coal Mine, mining seepage strain mechanism of seam floor was simulated by a nonlinear coupling method, which applied fluid-solid coupling analysis module of FLAC^3D. The results indicate that the permeability coefficient of adjoining rock changes a lot due to mining. The maximum value reaches 1 379.9 times to the original value, where it is at immediate roof of the mined-out area. According to the analysis on the seepage field, mining does not destroy water resistance of the floor aquiclude. The mining fissure does not conduct lime-stone aquifer, and it is less likely to form damage. The plastic zone does not exactly correspond to the seepage area, and the scope of the altered seepage area is much larger than the plastic zone.展开更多
Available silicone was melted from coal gangue samples from Hancheng dig- gings through calcination, digestion, and other means. The best calcination temperature was determined from a range of 550-1 150 ℃; and the be...Available silicone was melted from coal gangue samples from Hancheng dig- gings through calcination, digestion, and other means. The best calcination temperature was determined from a range of 550-1 150 ℃; and the best time, from a range of 0.5-5 h by colorimetry method. The proper ratio of coal gangue, limestone, sodium carbonate, and caustic soda was then determined through orthogonal experiment. The results show that the proper extraction condition for available silicone is the ratio of coal gangue, limestone, sodium carbonate, and caustic soda at 1：0.5：0.1：0.05, calcination temperature at 700 ℃, and calcination time at 2 h. In this condition, the available silicone content can be more than 19.65%.展开更多
文摘试验主要研究了野生灰条菜中维生素C提取工艺及其抗氧化活性。通过响应面分析法确定灰条菜中维生素C提取的最佳工艺条件,即超声波功率为276 W,超声波时间为40 min,提取温度为40℃,液料比值为11 m L/g。同时试验结果表明,灰条菜维生素C对羟自由基和超氧阴离子自由基具有较强清除能力,因此,灰条菜中维生素C具有较强的抗氧化活性。
文摘Based on the hydro-geological conditions of 1028 mining face in Suntuan Coal Mine, mining seepage strain mechanism of seam floor was simulated by a nonlinear coupling method, which applied fluid-solid coupling analysis module of FLAC^3D. The results indicate that the permeability coefficient of adjoining rock changes a lot due to mining. The maximum value reaches 1 379.9 times to the original value, where it is at immediate roof of the mined-out area. According to the analysis on the seepage field, mining does not destroy water resistance of the floor aquiclude. The mining fissure does not conduct lime-stone aquifer, and it is less likely to form damage. The plastic zone does not exactly correspond to the seepage area, and the scope of the altered seepage area is much larger than the plastic zone.
基金Supported by Education Department Project of Shannxi Province(06JK238)
文摘Available silicone was melted from coal gangue samples from Hancheng dig- gings through calcination, digestion, and other means. The best calcination temperature was determined from a range of 550-1 150 ℃; and the best time, from a range of 0.5-5 h by colorimetry method. The proper ratio of coal gangue, limestone, sodium carbonate, and caustic soda was then determined through orthogonal experiment. The results show that the proper extraction condition for available silicone is the ratio of coal gangue, limestone, sodium carbonate, and caustic soda at 1：0.5：0.1：0.05, calcination temperature at 700 ℃, and calcination time at 2 h. In this condition, the available silicone content can be more than 19.65%.
