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Olejki eteryczne otrzymywane z roślin rodzaju melaleuca : skład chemiczny i zastosowanie

Gajos Adrianna, Białoń Marietta, Wieczorek Piotr P.

Wiadomości Chemiczne

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2024

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[Z] 78, 5-6

467--489

EN

The Melaleuca plant genus is included in the myrtle family and is found from the Indochina Peninsula to Tasmania. The greatest diversity of plants in this family is found mainly in Australia. Essential oils extracted from plants of the Melaleuca genus are a mixture of valuable chemicals that exhibit a broad spectrum of biological properties. Studying the chemical composition of these oils can provide information on their active ingredients, which has applicationsin the pharmaceutical and cosmetic industries, as well as in aromatherapy. The essence of the study was to conduct an analysis to determine the chemical composition, learn about the main volatile compounds, as well as their percentage content in essential oils extracted from different varieties, namely: Melaleuca alternifolia (TTO), Melaleuca viridiflora (niaouli oil) and Melaleuca cajuputi (cayeput oil). Methods of analysis included gas chromatography coupled with mass spectrometry (GC-MS) to identify and determine the chemical components present in the samples. Two different chromatographic columns were used in the study - a non-polar column and a polar column. The results of the analysis indicated the presence of a variety of chemical components in essential oils of the Melaleuca genus. The composition of the chemical compounds present varied depending on the column used for analysis and the type of plant from which the oil was extracted. The main components of niauli and cayeput oils are: 1,8-cineole (eucalyptol), α-terpineol and α-pinene. TTO, on the other hand, contains terpinene-4-ol, p-cymene and γ-terpinene. These compounds exhibit antibacterial, anti-inflammatory activity.

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Zastosowanie cyklodekstryn w technologii wdrukowania molekularnego

Pokajewicz Katarzyna, Poliwoda Anna, Wieczorek Piotr P.

Wiadomości Chemiczne

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2022

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[Z] 76, 7-8

677--699

EN

In the last decade molecular imprinted polymers (MIP) have gained great interest in the area of selective recognition various type substances. Scientific work in this field is carried out very intensively - the methods of synthesis are modified and improved, new types of hydride materials are created, as well as new reagents for synthesis. In this case, cyclodextrins (CD) and their analogues show good molecular recognition ability for its unique physical and chemical properties and suitable cavity structure. As a result, these supramolecular ligands can perform various functions in the MIP technology, and the resulting polymeric materials are characterized by high selectivity and binding specificity (recognition) of analytes structurally matched to the MIP cavity. Of particular importance is the fact that cyclodextrins enable the imprinting not only of low-molecular-weight biologically active compounds, but also of high-molecular molecules (proteins, peptides). The numerous hydroxyl groups available in cyclodextrins are active sites that can form different types of linkages. They can be cross-linked with one another, or they can be derivatized to produce monomers that can form linear or branched networks. This article provides a detailed review of MIPs based on CD and their application in the field of separation science and analytical chemistry in recent years. The discussion is grouped according to the different role of CD in MIPs, that is, functional monomer, carrier modifier, etc.

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Biowęgiel jako środek polepszający właściwości gleby

Poluszyńska Joanna, Ślęzak Ewelina, Wieczorek Piotr P.

Przemysł Chemiczny

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2019

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T. 98, nr 1

98--105

PL

Przedstawiono główne kierunki wykorzystania biowęgla jako produktu beztlenowej niskotemperaturowej pirolizy biomasy. Omówiono najważniejsze parametry jakościowe, jakimi musi cechować się biowęgiel przeznaczony do zastosowania w agrotechnice. Autorzy porównali również zalecenia produkcyjne opracowane przez European Biochar Foundation, International Biochar Initiative oraz wytyczne europejskiego programu Fertilizers.

EN

A review, with 13 refs., of biochar quality parameters important for agricultural applications. The raw materials for its prodn. recommended by international chem. organizations were also presented.