Heart transplantation 1987--2007: 20 years' experience at Chulalongkorn hospital.

Objective: After many years, heart transplantation is still the most accepted treatment for end-stage heart disease. A heart transplantation program was started at our hospital in December 1987 as the first intrathoracic organ transplantation in Southeast Asia. Herein, we have reviewed our 20 years of experience from 1987 to 2007.

Oxidation of hydrogen sulfide by flocculated Thiobaccillus denitrificans in a continuous culture.

In a continuous fermentation, significant advantages may be gained by immobilization of microbial cells. Immobilization allows cells to be retained in the fermenter or to be readily recovered and recycled. Therefore, the hydraulic retention time and the biomass retention time are decoupled.