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1

Chemometric tools in the investigation of the mineral composition of food products derived from seaweed

Reczyński Witold, Musiał Joanna, Wójcik Szymon, Jakubowska Małgorzata

Analit

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2022

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Nr 11

2--18

EN

The work presents a new chemometric-assisted approach to distinguish commercially available food products based on their chemical composition. The analysed material consisted of 15 seaweeds (red Rhodophyta and brown Phaeophyta macroalgae) of various origin. The concentrations of the main nutrients (K, Na, Ca, and Mg) and essential trace elements (Fe, Mn, and Zn) were determined using flame atomic emission spectroscopy and atomic absorption spectrometry. The highest concentrations of nutrients were found in the products of brown algae (for example: the highest concentration of Ca was determined in the Kombu algae product - 13.92 mg/g dr.wt.; Mg - in Wakame - 9.85 mg / g dr.wt.) compared to the products of red algae (the lowest concentrations of Ca and Mg were found in Dulce algae - 1.87 mg / g dr.wt. and 2.83 mg / g dr.wt., respectively). Chemometric tools, i.e. principal components analysis and cluster analysis combined with heat maps allowed to distinguish samples clearly by species, red algae (Nori, Dulse, Irish moss) from brown ones (Wakame, Kombu). However, neither the place of harvest (country of origin) nor the food processing has allowed the separation of the food samples into individual groups. It was proven that the nutritional properties of food derived from naturally grown sea algae depend on the characteristic of the species, rather than on the place of harvest. Furthermore, the method of food processing changes its mineral composition to a very limited degree.

2

Functionalization of carbon biomaterials surfaces: functional groups and nanoparticles

Pajerski Wojciech, Chytrosz Paulina, Golda-Cepa Monika, Pawlyta Mirosława, Reczyński Witold, Ochonska Dorota, Brzychczy-Wloch Monika, Kotarba Andrzej

Engineering of Biomaterials

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2021

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Vol. 24, no. 163

40

3

Biopolymer microspheres modified with magnesium and zinc ions for tissue engineering applications

Domalik-Pyzik Patrycja, Byrska Martyna, Reczyński Witold

Engineering of Biomaterials

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2021

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Vol. 24, no. 163

101

4

Scientific fundamentals for antibacterial surfaces design and preparation

Pajerski Wojciech, Duch Joanna, Gołda-Cępa Monika, Ochońska Dorota, Szymańska Iwona, Reczyński Witold, Brzychczy-Włoch Monika, Kotarba Andrzej

Engineering of Biomaterials

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2020

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Vol. 23, no. 158 spec. iss.

38

5

Procedura przygotowania próbki ludzkiej chrząstki stawu biodrowego do ilościowego oznaczenia metali metodą Atomowej Spektrometrii Absorpcyjnej

Merchut Natalia, Reczyński Witold

Analit

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2019

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Nr 7

44--50

PL

Niniejsza praca dotyczy oznaczania stężeń wapnia, magnezu, cynku, żelaza oraz ołowiu w ludzkiej chrząstce stawowej. Została w niej przedstawiona procedura przygotowania próbki oraz ilościowej analizy wybranych metali w materiale biologicznym. W pierwszej części pracy przedstawiono, z czego składa się i jak funkcjonuje układ ruchu człowieka oraz morfologię chrząstki stawowej. Opisano również zawartość badanych pierwiastków oraz ich rolę w organizmie człowieka. Druga część odnosi się do przygotowania próbki, wybrania metody i dobrania odpowiednich parametrów pomiaru.

EN

This project to determine the concentrations of calcium, magnesium, zinc, iron and lead in human joint cartilage. It will be presented the procedure for preparing the sample for the determination and the development of the related procedure with the designation of complex biological material. The first part of the project presents of which consists the system of human motion, or function, morphology of cartilage damage. The content of studied elements and their role in the human body are also described. The second part refers to sample preparation, selection of the method and selection of appropriate measurement parameters.