Heme peroxidases are responsible for the dehydrogenation and oxidation metabolism of harmaline into harmine.

Harmaline and harmine are β-carboline alkaloids with effective pharmacological effects. Harmaline can be transformed into harmine after oral administration. However, enzymes involved in the metabolic pathway remain unclear.

[Effect of investment composition ratio for pure titanium crown and bridge on some mechanical properties of mould].

Objective: To determine the optimal composition of a self-developing investment material by measuring physical and mechanical properties of mould.

Methods: L(9) (3(4)) orthogonal design was adopted. One hundred and fifty specimens with the size of 80 mm × 20 mm × 20 mm were prepared to measure the atmospheric temperature bending strength, high temperature bending strength and residual bending strength.

[Effect of investment for titanium crown and bridge on reactive layer of castings].

Objective: To investigate the effect of self-developing investment (FUS-invest) on the reactive layer of titanium castings.

Methods: Three 10 mm x 10 mm x 1 mm pure titanium castings were founded using FUS-invest. Metallographical structure of reactive layer was observed.

[Effects of the improved FUS-invest investment for zirconium-oxide titanium crown and bridge on the reaction layer].

Objective: To investigate the effects of the improved FUS-invest investment for zirconium-oxide titanium crown and bridge on the reaction layer.

Methods: 10 mm x 10 mm x 1 mm titanium castings were invested. Spectrum analysis was done to its reaction layer, the metallographic examination was observed and Vickers hardness was measured.