水溶性膳食纤维抗过敏活性研究

The antiallergic activity of soluble dietary f ibers

为了研究水溶性膳食纤维的抗过敏活性，以豆渣、麦麸和柑橘为原料，得到了多种膳食纤维样品，测定了其透明质酸酶抑制率和相对分子质量。结果显示：柑橘膳食纤维比豆渣和麦麸膳食纤维具有更高的抗过敏活性，不同相对分子质量柑橘膳食纤维的抗过敏活性无明显差别；在试验选定的0．2％～1．2％的浓度范围内，随着浓度的上升，膳食纤维的抗过敏活性相应增强。

According to the stacking sequence hypothesis of metal, the corresponding material selection optimization mathematical model of hybrid metal-composite structure was established with the material property and layers number as design variables. Taking the hybrid steel-fiber reinforced composite structure as an example, the structural-acoustic radiation dynamic optimization design with multi-variables and multi-constraints problem was presented. In the end, by introducing genetic algorithm, the optimization problems were solved, and the structural material conversion was achieved. The numerical calculation shows that the vibration and acoustic radiation of the hybrid metal-composite structure can be reduced by using material selection optimization method. The paper provides an effective and feasible method to solve the problem for multi-material distribute optimization.