1. Chemical and bioactivity profiling of extractives from tropical wood residues : Ipe, Merbau, and JatobaAmina Selmanović, Wojciech Pajerski, Kamil Drożdż, Monika Brzychczy-Wloch, Andreja Kutnar, Rene Alexander Herrera Diaz, 2026, original scientific article Abstract: Wood residues and by-products from the furniture industry represent an underutilized resource with strong potential for integration into circular economy strategies. Extractives derived from these materials are rich in bioactive compounds, making them attractive candidates for bio-based product development. Although the functional properties of wood extractives are well recognized, their systematic recovery and characterization remain insufficiently explored in the context of green chemistry and sustainability. This study investigated the chemical composition and bioactivity of extractives obtained from industrial residues of three tropical hardwoods: Ipe (Handroanthus spp.), Merbau (Intsia spp.), and Jatoba (Hymenaea courbaril). Extractives were obtained via Pressurized Solvent Extraction (PSE) and characterized using gas chromatography (GC-FID and GC-MS). Ultrasound-assisted extraction (UAE) was subsequently applied for bioactivity evaluation. Green metrics, including the simple E-factor (sEF) and unit energy (UEC), were calculated to assess basic environmental efficiency. Gravimetric results showed a predominance of hydrophilic fractions (up to 97 % in Merbau), with major constituents including phenolics, fatty acids, flavonoids, and resin acids. Merbau and Jatoba extracts exhibited strong antioxidant capacity (IC50 < 75 μg/mL), while preliminary antimicrobial screening indicated selective activity of Merbau and Ipe against Staphylococcus aureus and Staphylococcus epidermidis, with Ipe also inhibiting Streptococcus pyogenes. These findings highlight tropical wood residues as renewable sources of bioactive compounds and support their valorisation in sustainable bio-based applications.
Keywords: tropical wood valorisation, green extraction, antioxidant capacity, bioactivity
Published in RUP: 26.01.2026; Views: 219; Downloads: 2
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2. Dataset of vocabulary in Uzbek primary education : extraction and analysis in case of the school corpusKhabibulla Madatov, Sapura Sattarova, Jernej Vičič, 2025, original scientific article Abstract: The main goal of this research work is to determine the number of new words that a primary school pupil should know/acquire during each academic year. To accomplish this, we have created two datasets. The first dataset was compiled based on the "Explanatory Vocabulary of the Uzbek Language" (EDUL). The second dataset was created from 35 primary school textbooks for grades 1-4 approved by the Ministry of Preschool and School Education of the Republic of Uzbekistan, and it was named the "Uzbek Primary School Corpus" (UPSC) by authors. Using the "Comparative Lemma Extraction Method" (CLEM) proposed by the authors of the article, a vocabulary for grades 1-4 was created, and the problem of determining the number of new words (disregarding word forms as Uzbek is a morphologically rich language) that primary school pupils should learn each academic year was solved.
Keywords: Uzbek language, primary school, corpus construction, natural language processing (NLP), comparative Lemma extraction method
Published in RUP: 08.08.2025; Views: 567; Downloads: 7
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3. The valorisation of olive mill wastewater from Slovenian Istria by Fe[sub]3O[sub]4 particles to recover polyphenolic compounds for the chemical specialties sectorKelly Peeters, Ana Miklavčič Višnjevec, Esakkiammal Sudha Esakkimuthu, Matthew Schwarzkopf, Črtomir Tavzes, 2021, original scientific article Keywords: polyphenolic compounds, olive mill wastewater, extraction techniques, Fe3O4 particles, magnetic collection, adsorption and desorption, quantitative and qualitative analysis
Published in RUP: 24.11.2021; Views: 2657; Downloads: 62
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4. Optimization of polyphenols extraction from spruce barkEsakkiammal Sudha Esakkimuthu, Kelly Peeters, Ana Miklavčič Višnjevec, Črtomir Tavzes, David Brian DeVallance, Andreja Kutnar, 2021, published scientific conference contribution abstract Keywords: bark, polyphenols, extraction, HPLC-DAD-ESI-MS/MS
Published in RUP: 24.06.2021; Views: 2946; Downloads: 50
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5. Extraction of phenolic compounds to determine its concentration in olive mill wastewaterKelly Peeters, Ana Miklavčič Višnjevec, Esakkiammal Sudha Esakkimuthu, Črtomir Tavzes, Matthew Schwarzkopf, 2021, published scientific conference contribution abstract Keywords: extraction techniques, HPLC-DAD-ESI-QTOF, olive mill wastewater, phenolic compounds
Published in RUP: 24.06.2021; Views: 2951; Downloads: 51
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6. An improved method for high-quality DNA extraction from olive embryos - plant tissue rich in polyphenols and polysaccharidesGabriela Vuletin Selak, Alenka Baruca Arbeiter, Slavko Perica, Tea Knap, Tatjana Klepo, Dunja Bandelj, 2018, published scientific conference contribution abstract Keywords: Olea europaea, microsatellites, DNA extraction, paternity analysis, self-compatibility, cross-compatibility
Published in RUP: 02.04.2020; Views: 3645; Downloads: 177
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7. Antioxidants in virgin olive oils produced from two olive cultivars of Slovene IstriaBojan Butinar, Milena Bučar-Miklavčič, Metoda Lipnik-Štangelj, 2006, original scientific article Keywords: olive oil, virgin olive oil, biophenols, tocopherols, extraction process, HPLC, Slovene Istria
Published in RUP: 10.07.2015; Views: 5396; Downloads: 30
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