Biodegradation and decolourization of methyl red by LH1.

Azo dyes constitute a significant environmental burden due to its toxicity, carcinogenicity, and hard biodegradation. The report here is focused on the decolorization and degradation treatment of azo dye methyl red (MR). Decolorization of MR using LH1 isolated from activated sludge was investigated.

Fibrarecisin, a novel triterpenoid from Fibraurea recisa with antitumor activity.

Fibrarecisin (1), a novel triterpenoid, was isolated from chloroform extract of the stem bark of Fibraurea recisa Pierre. Its structure was elucidated by spectroscopic methods. Compound 1 exhibited significant antitumor activity in vitro against A-549 cancer cell at 10 microM by SRB and MTT methods.

[Application of element and metabolism balancing for the cultivation process with Streptomyces aureofaciens].

On the base of element and metablism balancing, the mathematical model of the cultivation process with Streptomyces aureofaciens was developed, and the unknown parameters in the model were estimated with the method of nonlinear optimization. Firstly the energetic coefficient of CTC biosynthesis was gained, which was 1.8 - 2.