该文以太白贝母粗多糖(polysaccharide of fritillaria taipaiensis, PFT)及牛乳为原料,进行乳酸发酵,制得一种新型的具有潜在保健价值的酸奶食品。通过PFT酸奶的感官评价并结合酸度、粘度等理化指标,确定了PFT酸奶的生产工艺参数。利用...该文以太白贝母粗多糖(polysaccharide of fritillaria taipaiensis, PFT)及牛乳为原料,进行乳酸发酵,制得一种新型的具有潜在保健价值的酸奶食品。通过PFT酸奶的感官评价并结合酸度、粘度等理化指标,确定了PFT酸奶的生产工艺参数。利用Biolog测定PFT酸奶发酵过程中微生物对不同碳源的作用,发现其中对二糖、多糖底物的利用强度最大。以未添加PFT酸奶为对照,通过质构剖面分析法(TPA)研究不同时间对PFT酸奶质构影响,表明PFT酸奶随着老化时间延长,硬度和粘度增加,相比未添加PFT制得的酸奶硬度和粘度相对较低。展开更多
This paper aims to reduce the wind resistance of the self-designed offshore tourism platform by optimizing its superstructure,and a transparent shape design is finally suggested.A numerical simulation was performed to...This paper aims to reduce the wind resistance of the self-designed offshore tourism platform by optimizing its superstructure,and a transparent shape design is finally suggested.A numerical simulation was performed to calculate the wind load on the platform to test the effect of wind resistance reduction.Two original scale models(sealed and transparent)were established in accordance with the design requirements.The numerical simulation uses the FLUENT software combined with the built-in self-compiled user-defined function(UDF).The stochastic wind was also applied on the basis of the Davenport wind spectrum.The detached eddy simulation(DES)model was used to solve the NS equation.Numerical simulation results show that the wind resistance reduction for the transparent shape model is subtle in the horizontal direction but can effectively reduce the drag force and moment in the vertical direction.Moreover,the force variation of the transparent shape model under different wind attack angles decreases,which reduces the wind load fluctuations.展开更多
文摘该文以太白贝母粗多糖(polysaccharide of fritillaria taipaiensis, PFT)及牛乳为原料,进行乳酸发酵,制得一种新型的具有潜在保健价值的酸奶食品。通过PFT酸奶的感官评价并结合酸度、粘度等理化指标,确定了PFT酸奶的生产工艺参数。利用Biolog测定PFT酸奶发酵过程中微生物对不同碳源的作用,发现其中对二糖、多糖底物的利用强度最大。以未添加PFT酸奶为对照,通过质构剖面分析法(TPA)研究不同时间对PFT酸奶质构影响,表明PFT酸奶随着老化时间延长,硬度和粘度增加,相比未添加PFT制得的酸奶硬度和粘度相对较低。
基金Supported by the High-tech Ship Research Project of the Ministry of Industry and Information Technology(Grant No.2019[357]).
文摘This paper aims to reduce the wind resistance of the self-designed offshore tourism platform by optimizing its superstructure,and a transparent shape design is finally suggested.A numerical simulation was performed to calculate the wind load on the platform to test the effect of wind resistance reduction.Two original scale models(sealed and transparent)were established in accordance with the design requirements.The numerical simulation uses the FLUENT software combined with the built-in self-compiled user-defined function(UDF).The stochastic wind was also applied on the basis of the Davenport wind spectrum.The detached eddy simulation(DES)model was used to solve the NS equation.Numerical simulation results show that the wind resistance reduction for the transparent shape model is subtle in the horizontal direction but can effectively reduce the drag force and moment in the vertical direction.Moreover,the force variation of the transparent shape model under different wind attack angles decreases,which reduces the wind load fluctuations.