Manipulating the Cathodic Modification Effect on Corrosion Resistance of High Corrosion-Resistant Titanium Alloy.

Further improving the corrosion resistance of the ASTM Grade 13 (Gr13) titanium alloy was achieved by manipulating the cathodic modification effect. The cathodic modification of Gr13 was mainly related to the TiNi precipitate, where minor Ru was contained and controlled the precipitate in terms of size and distribution, which could manipulate the cathodic modification effect. Parameters such as temperature and cooling rate during the recrystallization process were designed to control precipitation behavior, where the temperature at 850 °C was selected to allow the full dissolution of the TiNi precipitate.

Effect of Iron Content on Corrosion Properties of Pure Titanium as Grain Refiner.

Microstructures and corrosion properties of pure titanium were characterized when iron was used as a grain refiner. The added Fe element acted as a strong grain refiner for pure titanium by forming β Ti phase at grain boundaries, and 0.15 wt% Fe was revealed to be a sufficient amount to make the grain size of pure titanium below 20 μm, which was the requirement for the desired titanium cathode.

Characterization of a family B DNA polymerase from the hyperthermophilic crenarchaeon Ignicoccus hospitalis KIN4/I and its application to PCR.

A family B DNA polymerase gene from the hyperthermophilic crenarchaeon Ignicoccus hospitalis KIN4/I was highly expressed under the control of T7lac promoter of pET-28ARG in Escherichia coli BL21-CodonPlus(DE3)-RIL cells. The produced I. hospitalis (Iho) DNA polymerase was purified by heat treatment followed by HisTrap™ HP column and HiTrap™ SP column chromatographies.