Ligninolytic fungus Polyporus sp. S133 mediated metabolic degradation of fluorene.

This study aimed to investigate the impact of nonionic surfactants on the efficacy of fluorine degradation by Polyporus sp. S133 in a liquid culture. Fluorene was observed to be degraded in its entirety by Polyporus sp.

Mechanism of triphenylmethane Cresol Red degradation by Trichoderma harzianum M06.

Cresol Red belongs to the triphenylmethane (TPM) class of dyes which are potentially carcinogenic or mutagenic. However, very few studies on biodegradation of Cresol Red were investigated as compared to other type dyes such as azo and anthraquinone dye. The aim of this work is to evaluate triphenylmethane dye Cresol Red degradation by fungal strain isolated from the decayed wood in Johor Bahru, Malaysia.

An extracellular sensor and an extracellular induction component are required for alkali induction of alkyl hydroperoxide tolerance in Escherichia coli.

Escherichia coli K12 transferred from pH 7.0 to pH 9.0 gains alkylhydroperoxide (AHP) tolerance.

Induction of the PhoE porin by NaCl as the basis for salt-induced acid sensitivity in Escherichia coli.

Organisms grown in low salt broth (LSB) are acid resistant but become sensitive on growth for 30-60 min with 300 mmol l-1 added NaCl. Salt-induced acid sensitivity only occurs in relA+ strains and sensitization is abolished by glucose, this catabolite repression effect being reversed by cAMP. The finding that sensitization did not occur in a phoE strain but did occur in a phoE+ derivative of it suggested that the response might result from PhoE induction, since PhoE acts as the major outer membrane (OM) proton pore under most conditions.

Regulatory aspects of alkali tolerance induction in Escherichia coli.

Escherichia coli shifted from external pH (pH(O)) 7.0 to pH(O) 8.5-9.