Design-Expert 7.0 software was used to carry out the response surface test on isoflavones extraction from soybean. The three factors of ethanol mass fraction, pressure and ratio of liquid to solid were investigated and their optimal values were determined to be: 61.50%, 152.00 KPa and 21:1, respectively. Under the optimal conditions, the maximum extraction rate of 3.58 mg/g was obtained, which is about 11% higher than that obtained at atmosphere. The established second multivariate regression equation was proven to be consistent with the experiment and can be used to predict the extraction rate of the isoflavones from soybean under different technical conditions.

The single factor experiment method was used to investigate the effects of microwave power（P）, extraction pressure(p), alcohol mass concentration（x%）, ratio of liquid to solid (l/s), pre-immersed time(τ) and particle size(d) on extraction efficiency of total isoflavones from pueraria lobata by pressurized microwave-assisted extraction technique. Based on the above the Design-Expert 6.0 software was used to carry out a response surface test with three factors (ratio of liquid to solid, pressure and alcohol mass concentration) to optimize the technical conditions and establish the mathematical model. The results show that the optimum technical conditions are: P =700w, p =132.61kPa, x =51.2%, l / s =10.45,τ=2h，d = 80 meshes. Under these conditions the extraction efficiency reaches 98.75% which is 23.5% higher than that by microwave-assisted extraction at atmospheric pressure. The established model (second multivariate regression equation) is consistent with the experiment and can predict the extraction efficiency of the total isoflavones under different technical conditions.

A wood-based Ni-P coating electromagnetic shielding material was prepared in an ytterbium oxide-added electroless plating bath. The kinetic model was established and confirmed to be in accord with the experiment and can be used to predict the deposition rate within a certain range. The experimental results showed that the Ni-P coating prepared with the addition of Yb2O3 were smoother, denser and brighter than that prepared without addition of Yb2O3. The deposition rate and electromagnetic shielding effectiveness of the former were 2.662mol×10-4/(cm2h) and 56.48 dB which is about 13% and 9% higher than those of the latter under the same bath compositions and operation conditions.

An effective emulsion liquid membrane system with P507 as carrier, Span-80 as surfactant and H2SO4 as internal aqueous phase was established to treat Ni(Ⅱ)-containing wastewater. The effects of volume fraction of Span-80 in the oil phase(φ(Span-80)), emulsifying stirring speed(ν1), separation stirring speed(ν2), volume fraction of P507(φ(P507)), volume ratio of oil phase to internal phase(Roi), milk phase to water phase(Rew) and concentration of H2SO4 in internal aqueous phase on Ni(Ⅱ) migrating rate have been investigated in the course of migrating of nickel ions in the system. The optimal operation conditions were determined to be: φ(Span-80)=8.5%,ν1 =3600 r·min-1,ν2 =320 r·min-1, φ(P507)=6.5%, Roi =1:1, Rew =2:5 and c（H2SO4）=1.6 mol·L-1 ,under which the migrating rate of nickel ions reached above 97%.

The extraction of collagen from fish scales with papain under ultrasonic pretreatment was conducted in this paper. The effects of the ultrasonic pretreatment time, the ratio of papain to fish scales, the extraction temperature and the extraction time on the extraction rate of collagen were investigated by single factor experiment and orthogonal experiment, respectively. The results showed that the optimum conditions for collagen extraction from fish scales were: ultrasonic pretreatment time 4min, ratio of papain to fish scales 4%, temperature 60°C and extraction time 5h. Under the optimum conditions the extraction rate of collagen reached 90.7%.