Studies on poly-β-hydroxybutyrate synthase activity of Nostoc muscorum

Nostoc muscorum pdf

Application of the Taguchi Design for Production of Poly(β-hydroxybutyrate) by Ralstonia eutropha

The Taguchi design of experiments was used to test the relative importance of medium components and environmental factors on poly(β-hydroxybutyrate)(PHB) production by Ralstonia eutropha. The optimum condition was obtained as: fructose concentration, 15 g/L; C/N ratio, 7.4; agitation speed 200 rpm; culture time, 40 h; temperature, 25 ° C; seed age, 15 h. At optimu...

Comparative Osmoregulatory Studies of K and Rb in the Cyanobacterium Nostoc muscorum

Rubidium (Rb ) is an analog of potassium (K ) and has been used as a tracer of potassium. In the + + present study we have analyzed its role as a nutrient as well as in osmoregulation in the cyanobacterium Nostoc muscorum. The filaments of N. muscorum will grow well in the medium in which K is replaced by Rb . Salt and + + osmotic sensitivity of the Rb grown cells increased in terms of percent ...

Biotransformation of AD and ADD using Nostoc muscorum

The potential of microalgae for steroid transformation has been studied less than other microorganisms. They have been applied for the years in the treatment of environmental pollutions and preparation of nutrients. At the first time, Abul-Hajj and Qian indicated the conversion of androstendione (AD) to testosterone with eleven different strains of microalgae. Previtera’s group showed the trans...

Differentiation in Nostoc muscorum: nitrogenase is synthesized in heterocysts.

Cellular differentiation can be observed in certain filamentous blue-green algae after transfer of the cells from medium containing NH(4) (+) or NO(3) (-) to nitrogen-free medium. The appearance of differentiated cells (heterocysts) is accompanied by an increase in the activity of nitrogenase, an enzyme complex that reduces N(2) to NH(3). We have separated vegetative cells from heterocysts in d...