A5088879253- Lignin and Wood Chemistry
- Phytochemicals and Antioxidant Activities
- Thermochemical Biomass Conversion Processes
- Biochemical and biochemical processes
- Biofuel production and bioconversion
- Coal Combustion and Slurry Processing
- Fermentation and Sensory Analysis
- Plant Growth Enhancement Techniques
- Polymer composites and self-healing
- Food Industry and Aquatic Biology
- Phytochemical and Pharmacological Studies
- Mesoporous Materials and Catalysis
- Seaweed-derived Bioactive Compounds
- Plant biochemistry and biosynthesis
- Enzyme-mediated dye degradation
- Advanced Cellulose Research Studies
- biodegradable polymer synthesis and properties
- Adsorption and biosorption for pollutant removal
- Adsorption, diffusion, and thermodynamic properties of materials
- Biodiesel Production and Applications
- Composting and Vermicomposting Techniques
- Flame retardant materials and properties
- Dyeing and Modifying Textile Fibers
- Bioeconomy and Sustainability Development
- Natural product bioactivities and synthesis
Latvian State Institute of Wood Chemistry
2014-2023
EKA University of Applied Sciences
2021
University of Latvia
2020
Latvia University of Life Sciences and Technologies
2020
University of Aveiro
2013
University of Haifa
2013
Fractionation of softwood and hardwood LignoBoost kraft lignins, using sequential extraction with organic solvents increasing hydrogen-bonding ability (dichloromethane, n-propanol, methanol), was carried out. Using SEC, analytical pyrolysis, FTIR UV/VIS spectroscopy, chemical methods, four fractions were obtained characterized in terms their yield, composition, functionality, lignin structural features, antioxidant properties. In tests free radicals (ABTS●+, DPPH●, O2●-) the ORAC (oxygen...
Abstract The antioxidant activities (AoAs) of 50 different technical lignins have been determined. various botanical origins (annual plants, coniferous trees, and deciduous trees) were isolated fractionated by techniques (delignification alkali, kraft process, fast pyrolysis, hydrolysis). structure the functionality characterized functional group analyses (phenolic OH, carboxyl, methoxyl groups), analytical pyrolysis pyrolysis/gas chromatography/mass spectrometry/flame ionization detector...
Nowadays, approximately 1 billion kg/y of grape stalks, with a remarkable polyphenols content, are produced worldwide. In this paper, the extraction process intensification in water was achieved under ultrasound-assisted recovery, focusing on kinetics and scaling-up factors. Immersion cup-horn systems were exploited as acoustic cavitation sources, total phenolic content (TPC) chosen to assess efficiency. The evaluated by Peleg’s hyperbolic model, effect both initial feedstock granulometry...
For sustainable sea buckthorn (Hippophae rhamnoides) berry production, the task at hand is to find an application for large amount of biomass waste arising harvesting. Sea (SBT) vegetation currently poorly studied. The purpose this research was assess composition and potential SBT twigs as a source valuable biologically active substances. Water 50% EtOH extracts three Latvian cultivars with high yield quality, popular cultivation in many countries (H. rhamnoides ‘Maria Bruvele’, ‘Tatiana’,...
It has now been proven that many pathogens cause infections and inflammation gradually mutate become resistant to antibiotics. Chemically synthesized drugs treating most often only affect symptoms, but side effects could lead the failure of human organs' functionality. On other hand, plant-derived natural compounds have a long-term healing effect. was shown sea buckthorn (SBT) twigs are rich source biologically active compounds, including oligomeric proanthocyanidins (PACs). This study aimed...
Abstract The bark of trees has a big potential as source green chemicals. aim the present work was to valorise deciduous tree species with this regard. Three widely spread in Europe (grey alder, ash tree, aspen) were focus polyphenols, and yields polyphenolic compound extracts considered evaluation criteria. highest hydrophilic extractives found barks grey alder aspen (36.8 22.9%, respectively). In former, antioxidant activity towards free radicals (DPPH • ABTS •+ ) superoxide anion radical....
The valorization of lignins as renewable aromatic feedstock is utmost importance in terms the use sustainable resources. This study provides a deductive approach towards market-oriented lignin-derived antioxidants by ascertaining direct effect different structural features lignin on reactivity its phenolic OH groups radical scavenging reactions. antioxidant activity series compounds, modeling units, was experimentally characterized and rationalized, using thermodynamic descriptors....
Full analytical data of Ecuadorian cocoa wastes (raw shells) and beans (as benchmark), are herein reported. A detailed characterization production residues may pave the road to a zero-waste strategy for industry. Multiple techniques have been exploited define composition matrices, among them: elemental analyses, FTIR, Py-GC/MS/FID UHPLC-ESI-MS/MS. Quali-quantitative carbohydrates, lipids, lignin, polyphenols, alkaloids proteins obtained by Assignations fully supported literature references....