Publications by authors named "Rafal Ziewiecki"

The polyphenolic-polysaccharide complex was isolated from the dried aerial parts of the medicinal plant Agrimonia eupatoria L. using a multi-step process involving the degreasing of the plant material by extraction with organic solvents, followed by extraction with hot alkali, neutralization, further separation with organic solvents and dialysis. The complex was homogeneous with a molecular weight of about 55 × 10 g/mol and consisted mainly of carbohydrates and polyphenols matrix, composed of lignin-related units, with the dominance of dimethoxyphenyl structures.

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Background: Pig manure utilization and valorization is an important topic with tightening regulations focused on ecological and safety issues. By itself pig manure is a poor substrate for biogas production because of its excessive nitrogen content relative to available organic carbon. Such substrate is alkaline, and methanogenesis can be suppressed, and so additional substrates with high organic carbon must be added.

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A macromolecular complex has been isolated from the dried flowering parts of medicinal plant Sanguisorba officinalis L. (So) by multi-step extraction procedure, including that with extraction by organic solvents to degrease the plant material, then with hot alkali, followed by neutralization, partitioning with organic solvents and dialysis. The complex was purified by size-exclusion chromatography into five fractions labeled as So1-So5.

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Over last few years, biosensors have become increasingly used as a research tool. Using innovative techniques of detection and estimation of the strength of intermolecular bonds, is particularly important in biochemical processes, including the study of mechanisms of interactions between plasma proteins in the circulatory system. With the numerous enhancements biosensors have become extremely sensitive devices, allowing for analysis of diverse biological material.

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