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This work reviews the recent patents and progresses of novel membrane contactors used in gas/liquid separation. Compared with conventional separation facilities, membrane contactors will play more and more important role in waste treatment in the near future. The advantages in separation include wider operation range, higher separation efficiency, independent flow between liquid and gas, linear scale-up and compact structure, etc. The structure of hollow fiber membrane contactor are emphatically analyzed and typical gas/liquid separation process such as membrane adsorption, membrane distillation and membrane structured packing in waste treatment are investigated in detail. Some successful commercial products in use such as Liqui-Cel membrane contactor were introduced for example.

Small G proteins are implicated in regulation of endothelial function, smooth muscle cell contraction, proliferation, and migration, as well as cardiomyocyte hypertrophy. Targeting small G proteins and their downstream signaling could constitute promising therapeutic approaches in cardiovascular disorders such as atherosclerosis, restenosis, hypertension, vasospasm, and cardiac hypertrophy.

Experimental material was the waste platinum-rhenium catalyst; the kinetics of rhenium in PT rhenium catalyst failed by pressure oxygen leaching was studied. The effects of leaching pressure, temperature, sulfuric acid acidity, stirring speed and particle size on the kinetics of rhenium leaching were investigated in this paper. The results showed that sulfuric acid, leaching temperature, leaching pressure and particle size had a significant effect on the leaching rate of rhenium; the chemical reaction control model can well describe the rhenium gas liquid-solid reaction process in the waste platinum-rhenium catalyst for pressure oxygen leaching. In the experimental range, the apparent activation energy is determined to be 42.96kJ/mol, which is in agreement with the chemical reaction control model.

Some assembly forces will be generated on fixtures because of some existing variation sources during the welding process of automotive body compliant metal parts. This article proposes an assembly force modelling method on fixtures during the welding process of compliant sheet metal parts to decrease the assembly forces. The assembly force models on fixtures are established to show the influence relationship between assembly forces and all variation sources, and the finite element method is used to obtain all influence coefficients of assembly forces. The obtained assembly force models on fixtures describe the propagating principle of assembly forces in all welding subprocesses. Cases of different fixture layouts show that the fixture layout can greatly influence assembly forces on fixtures. So assembly forces on fixtures can be decreased through the optimization of variation sources and the fixture layout. This method can also be referred for other assembly processes, such as adhesive connection and fastener connection of compliant sheet metal parts.