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Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Spent yeast as natural source of functional food additives

100%
Rakowska R., Sadowska A., Dybkowska E., Swiderski F.
Roczniki Państwowego Zakładu Higieny
|
2017
|
tom 68
|
nr 2
Spent yeasts are by-products arising from beer and wine production which over many years have been chiefly used as feed additives for livestock. They contain many valuable and bioactive substances which has thereby generated much interest in their exploitation. Up till now, the main products obtained from beer-brewing yeasts are β-glucans and yeast extracts. Other like foodstuffs include dried brewer’s yeast, where this is dried and the bitterness removed to be fit for human consumption as well as mannan-oligosaccharides hitherto used in the feed industry. β-glucans constitute the building blocks of yeast cell walls and can thus be used in human nutrition as dietary supplements or serving as food additives in functional foods. β-glucans products obtained via post-fermentation of beer also exhibit a high and multi-faceted biological activity where they improve the blood’s lipid profile, enhance immunological status and have both prebiotic and anti-oxidant properties. Yeast extracts are currently being used more and more to enhance flavour in foodstuffs, particularly for meat and its products. Depending on how autolysis is carried out, it is possible to design extracts of various meat flavours characteristic of specific meats. Many different flavour profiles can be created which may be additionally increased in combination with vegetable extracts. Within the food market, yeast extracts can appear in various guises such as liquids, pastes or powders. They all contain significant amounts of glutamic acid, 5’-GMP and 5’-IMP nucleotides together with various amino acids and peptides that act synergistically for enhancing the flavour of foodstuff products. Recent studies have demonstrated additional benefits of yeast extracts as valuable sources of amino acids and peptides which can be used in functional foods and dietary supplements. These products possess GRAS status (Generally Recognised As Safe) which thereby also adds further as to why they should be used as natural food additives that are functional.
2

Exposition of human organism to non-medical sources of ionizing radiation

84%
Kalinowski P., Rozylo-Kalinowska I., Rozylo T.
Polish Journal of Environmental Studies
|
2004
|
tom 13
|
nr Suppl.2, Part 1
In everyday life human organism is subjected to ionizing radiation coming from natural and artificial sources, including medical diagnostics and therapy. However, contrary to popular beliefs the highest average exposition is due to natural sources. The artificial non-medical sources of ionizing radiation include radioactive materials used in industry and radioactive fallout. Natural exposition comes from internal sources (radioactive elements in the body) and external ones, such as primary and secondary cosmic radiation as well as terrestrial radiation. Therefore it was found that exposure to ionizing radiation coming from sources other than medical amounts to 85% of the total average exposure.
3

Heavy metals in the Baltic surface sediments

84%
Pempkowiak J., Walkusz-Miotk J.
Bulletin of the Polish Academy of Sciences. Earth Sciences
|
1994
|
tom 42
|
nr 1
4
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Survival in extremes

67%
Malecki P. H., Rypniewski W.
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
|
2013
|
tom 94
|
nr 1
5
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Precipitation and duff fall as natural sources of nitrogen and phosphorus for forest soils in the Slowinski National Park

67%
Parzych A., Trojanowski J.
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline
|
2006
|
tom 10
Every year forest soils are enriched with nitrogen and phosphorus compounds due to the fall of leaves and litter of conifer needles, mineralization of ground cover and decaying tree roots, as well as precipitation. The process has been examined in two forest ecosystems: a mixed forest (plot I) and a young wood (plot II). The overall fall of duff collected in the young wood of the Słowinski National Park (plot II) has been 3.014 t/ha·year, which constitutes 69.35% of the fall collected in the mixed forest (plot I) on this territory (4.346 t/ha·year). The maximum intensity of duff fall occurred in autumn months and constituted 62.36% and 64.20% of annual fall respectively. Totally, 46.96 kg/ha·year of N and P were supplied to the soil of the plot I and 22.04 kg/ha·year in the case of the plot II. The precipitation enriched the soils of the mixed forest by 33.66 kg/ha·year of nitrogen and 1.19 kg/ha·year of phosphorus, the soils of the young wood – by 23.06 kg/ha·year of nitrogen and 0.92 kg/ha·year of phosphorus.
6

Isolation and screening of glucose oxidase producing microorganisms from natural sources

67%
Fiedurek J., Ilczuk Z.
Acta Microbiologica Polonica
|
1992
|
tom 41
|
nr 3-4
7

Concentration of selected elements in honeybee-collected pollen

59%
Szczesna T.
Journal of Apicultural Science
|
2007
|
tom 51
|
nr 1
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