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STUDY OF THE INFLUENCE OV UV RADIATION ON BIODEGRADABLE BLENDS BASED ON CHITOSAN AND STARCH

100%
Bajer D., Kaczmarek H.
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vol. 15
17 - 24
EN
The biodegradable blends of chitosan and starch with different component ratios were prepared by casting method. Obtained thin films were UV-irradiated (λ = 254 nm) and changes in chemical structure were monitored using FTIR and UV-Vis spectroscopies. It was found that the chitosanstarch blends were more susceptible to UV irradiation comparing to pure starch specimen. FTIR spectra of blends suggest partial interactions between chitosan and starch macrochains.
2
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Rheological scaling properties of starch solutions in dimethylsulfoxide

100%
Ptaszek P., Łukasiewicz M., Ptaszek A., Grzesik M.
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vol. 33
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issue 3
323-333
EN
The possibility of scaling viscoelastic properties of starch solutions in relation to biopolymer concentration was presented in this study. An application of this empirical method enabled to widen the observation horizon of viscoelastic properties. It was also determined that the scope of its applicability is limited by amylose content in the solution. In high amylose solutions, for which up to 40% (w/w) concentration was the highest one obtained, calibration caused the formation of master curve in the widest frequency range. Determined values of scaling coefficients aC changed exponentially in starch concentration function in the solution. For waxy starch solutions of maximum concentration equal to 20% (w/w), scaling did not significantly widen the observation window. Based on master curves constructed in such way, continuous relaxation spectra H(λ) were determined using Tikhonov regularisation method. Their structure indicates advantageous of viscous elements in the process of viscoelastic phenomena formation.
3
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Rheological scaling properties of starch solutions in dimethylsulfoxide

88%
Łukasiewicz M., Ptaszek P., Ptaszek A., Grzesik M.
Chemical and Process Engineering
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2012
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issue 3
4
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Traditional and new raw materials for spirit beverage production

75%
Ługowoj S., Balcerek M.
Acta Universitatis Lodziensis. Folia Biologica et Oecologica
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2021
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vol. 17
70-78
EN
The ethanol production industry is a fast growing branch of the economy in many countries, and there is a rich tradition of spirit beverage production of many unique drinks such as Polish vodka and Starka or Irish and Scotch whisk(e)y, all of which have unique organoleptic features. This variety is possible thanks to different raw materials used for production such as rye, barley or corn and potatoes, as well as technological solutions developed over the generations of manufacturing. Rye deserves a closer look due to its low growth requirements and many different uses as well as its long tradition of cultivation, especially in Poland. On the other hand, manufacturers are currently interested in using new, original raw materials for the production of so-called craft alcohols. Buckwheat is an example of a raw material that can be successfully used in the production of original spirits.
5
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Can Changes in Starch Content and Peroxidase Activity Be Used as Rooting Phase Markers for Rhododendron Leaf Bud Cuttings?

75%
Megre D., Dokane K., Kondratovics U.
Acta Biologica Cracoviensia s. Botanica
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2011
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vol. 53
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issue 1
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