Microbially induced calcium carbonate precipitation is one of the biomineralization types closely dependent on the parameters of the microenvironment. Minerals are precipitated as a product of environmental and bacterial cell interactions, however, this system has very little control via microorganisms. The aim of research was to determine the influence of abiotic factors (pH, temperature, agit...

AIMS The aim of this study was to isolate a thermotolerant micro-organism that produces polyhydroxyalkanoates (PHAs) composed of medium-chain-length (mcl) HA units from a biodiesel fuel (BDF) by-product as a carbon source. METHODS AND RESULTS We successfully isolated a thermotolerant micro-organism, strain SG4502, capable to accumulate mcl-PHA from a BDF by-product as a carbon source at a cul...

In general, morphological, physiological, and biochemical properties of fungal cells are drastically different among solid-state (SSC), liquid-surface (LSC), and submerged cultivation (SmC) systems. In addition to these traditional cultivation systems, a unique liquid-surface cultivation [liquid-surface immobilization (LSI)] system and interface cultivation systems [extractive liquid-surface im...

Poria cocos WOLF), belonging to the Polyporaceae in basidiomycetes, forms sclerotia on the roots of such trees as pine, cedar, fir and oak. The major host plant of this fungus in Japan, China and Korea is the pine and the dried sclerotium of W. cocos is called “Bukuryo” in Japanese. In the Japanese Pharmacopoeia, the external layer is usually mostly removed. It is one of the most important crud...

The paperaim of the was to study the effect of low temperature stress on Avena nuda L. seedlings. Cold stress leads to many changes of physiological indices, such as membrane permeability, free proline content, malondialdehyde (MDA) content, and chlorophyll content. Cold stress also leads to changes of some protected enzymes such as peroxidase (POD), superoxide dismutase (SOD), and catalase (CA...

Thermophilic organisms have been less explored due to the difficulties in isolation and maintenance of pure culture. Therefore, it remains to explore their diversity and biotechnological potential from majority of the thermal habitats. As a consequence of growth at high temperature and unique macromolecular properties, thermophiles can possess high metabolic rates, physically and chemically sta...

The colony formation of sulfate-reducing bacteria, Desulfovibrio desulfuricans and Desulfotomaculum orientis, on agar plates well fitted the theoretical curve of the FOR model proposed by Hattori (1985) The estimates of A for both strains dropped from 5 to I day-1 with cultivation in a liquid medium or starvation in a buffer solution, while that of tr was not affected so much The estimates of h...