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
The ground penetrating radar(GPR) forward simulation all aims at the singular and regular models, such as sandwich model, round cavity, square cavity, and so on, which are comparably simple. But as to the forward of c...The ground penetrating radar(GPR) forward simulation all aims at the singular and regular models, such as sandwich model, round cavity, square cavity, and so on, which are comparably simple. But as to the forward of curl interface underground or “v” figure complex model, it is difficult to realize. So it is important to forward the complex geoelectricity model. This paper takes two Maxwell’s vorticity equations as departure point, makes use of the principles of Yee’s space grid model theory and the basic principle finite difference time domain method, and deduces a GPR forward system of equation of two dimensional spaces. The Mur super absorbed boundary condition is adopted to solve the super strong reflection on the interceptive boundary when there is the forward simulation. And a self-made program is used to process forward simulation to two typical geoelectricity model.展开更多
[ Objective] To optimize the extraction conditions of insoluble dietary fiber from apple pulp. [ Method] The insoluble dietary fiber was ex-tracted from the apple pulp by alkaline, and the optimal extraction condition...[ Objective] To optimize the extraction conditions of insoluble dietary fiber from apple pulp. [ Method] The insoluble dietary fiber was ex-tracted from the apple pulp by alkaline, and the optimal extraction conditions were determined by orthogonal experiment. [ Result] The influential or-der of each factor on the extraction of insoluble fiber decreased in the order of solid-liquid ratio 〉 alkali concentration 〉 temperature 〉 extraction time, and the optimal extraction technology was A3 B1 C2 D2, that is, 1：11 （g/ml） of solid-liquid ratio, 0.25 mol/L alkaline concentration, 50 ℃ of extraction temperature and 2.0 h extraction time, under these conditions, the yield of insoluble dietary fiber was 35.46%. [ Conchsion] The apple pulp contains rich dietary fiber, and the insoluble dietary fiber extracted from the apple pulp has great development value. Key words Apple; Insoluble dietary fiber; Extraction technology; China展开更多
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%.
文摘The ground penetrating radar(GPR) forward simulation all aims at the singular and regular models, such as sandwich model, round cavity, square cavity, and so on, which are comparably simple. But as to the forward of curl interface underground or “v” figure complex model, it is difficult to realize. So it is important to forward the complex geoelectricity model. This paper takes two Maxwell’s vorticity equations as departure point, makes use of the principles of Yee’s space grid model theory and the basic principle finite difference time domain method, and deduces a GPR forward system of equation of two dimensional spaces. The Mur super absorbed boundary condition is adopted to solve the super strong reflection on the interceptive boundary when there is the forward simulation. And a self-made program is used to process forward simulation to two typical geoelectricity model.
文摘[ Objective] To optimize the extraction conditions of insoluble dietary fiber from apple pulp. [ Method] The insoluble dietary fiber was ex-tracted from the apple pulp by alkaline, and the optimal extraction conditions were determined by orthogonal experiment. [ Result] The influential or-der of each factor on the extraction of insoluble fiber decreased in the order of solid-liquid ratio 〉 alkali concentration 〉 temperature 〉 extraction time, and the optimal extraction technology was A3 B1 C2 D2, that is, 1：11 （g/ml） of solid-liquid ratio, 0.25 mol/L alkaline concentration, 50 ℃ of extraction temperature and 2.0 h extraction time, under these conditions, the yield of insoluble dietary fiber was 35.46%. [ Conchsion] The apple pulp contains rich dietary fiber, and the insoluble dietary fiber extracted from the apple pulp has great development value. Key words Apple; Insoluble dietary fiber; Extraction technology; China
