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A study was made of the degradation of archaeological Scots pine (Pinus sylvestris L.) at the Iron Age archaeological site of Biskupin, Poland. Wood degradation was evaluated after 10 years of deposition of samples in different burial conditions (mineral soil, peat and water) and at different depths (25, 50 and 100 cm) at the location of the original archaeological wood from the Lusatian culture settlement...
Bacteria from the genus Bacillus are a rich source of commercial enzymes, including amylases, proteases, cellulases, glucose isomerase, and pullulanase. Cellulases account for 15% of the global market of industrial enzymes; thus, new microorganisms producing cellulases in a higher concentration and new ingredients, which can enhance the level of enzyme synthesis, are still needed. Many of cellulose-degrading...
Because of an increasing interest in “green” processes for the production of chemicals, researchers are constantly looking for new strains. The natural environment offers a rich isolation source. Strains from natural probes have strong metabolic properties because they must adapt to variable conditions, and they are also able to produce a wide range of metabolites efficiently. This work is a very...
The ability of structurally different ionic liquids with cocotrimetylammonium, didecyldimethyloammonium and bis-dimethyloctylammonium cations to degrade in water and soil environments were investigated. The test in water was conducted according to OECD guidelines 301 A and 302 B. Secondary effluent from a domestic sewage treatment plant in Zabrze, Poland was used as the inoculum. The ready biodegradability...
1,3-Propanediol (1,3-PD) production by fermentation of glycerol was first described in 1881 but little attention was paid to this biosynthesis for over a century. An increasing interest in microbial 1,3-PD production is observed since late 1980s. The high growth rate of the biofuel market and the perspective of glycerol becoming abundant attract even more attention to this valuable chemical.Glycerol...
Background. An intensive development of the Fast Liquid Chromatography (FLC) has been recently observed. It makes possible to reduce time analysis and improve resolution as well as sensitivity. The aim of this study was to separate the chosen antioxidants optimization using the FLC method. Material and methods. The three various procedures for antioxidants analysis were compared. Mobile phases containing...
Background. Flow cytometry constitutes an altemative for traditional methods of microorganisms identification and analysis, including methods reąuiring cultivation step. It enables the detection of pathogens and other microorganisms contaminants without the need to culture microbial cells meaning that the sample (water, waste or food e.g. milk, wine, beer) may be analysed directly. This leads to a...
Bacteria are able to sense an increase in cell population density and to respond to it by the induction of a particular set of genes. This mechanism, called quorum sensing, includes in gram-negative bacteria the production and secretion of an acyl homoserine lactone, which diffuses through the cell wall, from the cell to the medium. Bacteria use the quorum sensing mechanism to regulate a variety of...
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