以鲢鱼鱼骨为研究对象,采用酶法提取食用明胶。以明胶产率最大化,产品质量能够达到食用级别为目标,对明胶的酶解过程进行优化,然后按照食用明胶的国家标准对明胶产品的理化指标和微生物指标进行检测。结果表明:鲢鱼鱼骨明胶的提取中酶...以鲢鱼鱼骨为研究对象,采用酶法提取食用明胶。以明胶产率最大化,产品质量能够达到食用级别为目标,对明胶的酶解过程进行优化,然后按照食用明胶的国家标准对明胶产品的理化指标和微生物指标进行检测。结果表明:鲢鱼鱼骨明胶的提取中酶解过程的最优工艺条件为:p H 2、37℃、胃蛋白酶用量0.02 g/g干骨、时间3.5 h、料液比为1∶6.5。在最佳工艺条件下,鱼骨明胶的产率达到19.6%。对明胶产品的理化指标和微生物指标的测定,表明鲢鱼鱼骨明胶符合食用级明胶的规定,并且其凝冻强度和勃氏黏度均较高,质量较优。展开更多
The lightweight design of hydraulic quadruped robots,especially the lightweight design of the leg joint Hydraulic Drive Unit(HDU),can improve the robot's response speed,motion speed,endurance,and load capacity.How...The lightweight design of hydraulic quadruped robots,especially the lightweight design of the leg joint Hydraulic Drive Unit(HDU),can improve the robot's response speed,motion speed,endurance,and load capacity.However,the lightweight design of HDU is a huge challenge due to the need for structural strength.This paper is inspired by the geometric shape of fish bones and biomimetic reinforcing ribs on the surface of the HDU shell are designed to increase its strength and reduce its weight.First,a HDU shell with biomimetic fish bone reinforcing ribs structure is proposed.Then,the MATLAB toolbox and ANSYS finite element analysis module are used to optimize the parameters of the biomimetic reinforcing ribs structure and the overall layout of the shell.Finally,the HDU shell is manufactured using additive manufacturing technology,and a performance testing platform is built to conduct dynamic and static performance tests on the designed HDU.The experimental results show that the HDU with biomimetic fish bone reinforcing ribs has excellent dynamic performance and better static performance than the prototype model,and the weight of the shell is reduced by 20%compared to the prototype model.This work has broad application prospects in the lightweight and high-strength design of closed-pressure vessel components.展开更多
文摘以星鳗骨为原料,研究了双酶法提取星鳗骨鱼油的工艺条件。在单因素试验的基础上,以鱼油得率为指标进行响应面优化试验,并对星鳗骨鱼油进行理化性质分析。结果表明,最佳的提取条件为:每100 g底物中加入1.6 g胰蛋白酶,加1.6%胰蛋白酶,在酶解温度45℃、初始p H 8下水解4.2 h;再加入1.0%胃蛋白酶,调节p H 2.5,控制酶解温度为40℃,在此条件下酶解3.1 h,最终的粗鱼油得率达到24.44%。所得星鳗骨鱼油颜色为浅黄色,具有鱼油腥味,但是没有明显鱼油的酸败味,指标符合SC/T 3502—2016鱼油中粗鱼油二级标准。
文摘以鲢鱼鱼骨为研究对象,采用酶法提取食用明胶。以明胶产率最大化,产品质量能够达到食用级别为目标,对明胶的酶解过程进行优化,然后按照食用明胶的国家标准对明胶产品的理化指标和微生物指标进行检测。结果表明:鲢鱼鱼骨明胶的提取中酶解过程的最优工艺条件为:p H 2、37℃、胃蛋白酶用量0.02 g/g干骨、时间3.5 h、料液比为1∶6.5。在最佳工艺条件下,鱼骨明胶的产率达到19.6%。对明胶产品的理化指标和微生物指标的测定,表明鲢鱼鱼骨明胶符合食用级明胶的规定,并且其凝冻强度和勃氏黏度均较高,质量较优。
文摘The lightweight design of hydraulic quadruped robots,especially the lightweight design of the leg joint Hydraulic Drive Unit(HDU),can improve the robot's response speed,motion speed,endurance,and load capacity.However,the lightweight design of HDU is a huge challenge due to the need for structural strength.This paper is inspired by the geometric shape of fish bones and biomimetic reinforcing ribs on the surface of the HDU shell are designed to increase its strength and reduce its weight.First,a HDU shell with biomimetic fish bone reinforcing ribs structure is proposed.Then,the MATLAB toolbox and ANSYS finite element analysis module are used to optimize the parameters of the biomimetic reinforcing ribs structure and the overall layout of the shell.Finally,the HDU shell is manufactured using additive manufacturing technology,and a performance testing platform is built to conduct dynamic and static performance tests on the designed HDU.The experimental results show that the HDU with biomimetic fish bone reinforcing ribs has excellent dynamic performance and better static performance than the prototype model,and the weight of the shell is reduced by 20%compared to the prototype model.This work has broad application prospects in the lightweight and high-strength design of closed-pressure vessel components.
