Ultrastructure of an extreme thermophilic hydrogen-oxidizing bacterium Calderobacterium hydrogenophilum

Ludvı́k, Jiřı́; Benada, Oldřich; Mikulı́k, Karel

doi:10.1007/bf00301849

Cited by 4 publications

(1 citation statement)

References 22 publications

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“…The cell wall of Bacillus SF seems to be very thick (1b). Indeed, with a thickness of 18.6+/−2.5 nm it was comparable to that of the alkalophilic Bacillus lentus (21.5 +/−2.2 nm) (Aono et al, 1995), but it was thicker than the cell wall of a thermophilic Claderobacterium hydrogenophilum with a thickness of 9 -10 nm (Ludvik et al, 1994). Since the cell walls of alkaliphilic Bacilli is thought to be essential in providing a passive barrier to ion flux and elevation of cytoplasmic buffering capacity at highly alkaline growth pH (Krulwich et al, 1997), a thick cell wall with unusual shape of the new Bacillus SF is not surprising.…”

Section: Bacillus Sfmentioning

confidence: 91%

Thermo-alkali-stable catalases from newly isolated Bacillus sp. for the treatment and recycling of textile bleaching effluents

Paar¹,

Costa

Tzanov

et al. 2001

Journal of Biotechnology

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Three thermoalkaliphilic bacteria, which were grown at pH 9.3-10 and 60-65 degrees C were isolated out of a textile wastewater drain. The unknown micro-organisms were identified as thermoalkaliphilic Bacillus sp. Growth conditions were studied and catalase activities and stabilities compared. Catalases from Bacillus SF showed high stabilities at 60 degrees C and pH 9 (t1/2=38 h) and thus this strain was chosen for further investigations, such as electron microscopy, immobilization of catalase and hydrogen peroxide degradation studies. Degradation of hydrogen peroxide with an immobilized catalase from Bacillus SF enabled the reuse of the water for the dyeing process. In contrast, application of the free enzyme for treatment of bleaching effluents, caused interaction between the denaturated protein and the dye, resulting in reduced dye uptake, and a higher color difference of 1.3DeltaE* of dyed fabrics compared to 0.9DeltaE* when using the immobilized enzyme.

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Section: Bacillus Sfmentioning

confidence: 91%