Vizma Nikolajeva

ORCID: 0000-0002-5823-7292
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About
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Research Areas
  • Mycorrhizal Fungi and Plant Interactions
  • Plant Pathogens and Fungal Diseases
  • Fungal Biology and Applications
  • Anaerobic Digestion and Biogas Production
  • Biofuel production and bioconversion
  • Plant-Microbe Interactions and Immunity
  • X-ray Diffraction in Crystallography
  • Phytochemicals and Antioxidant Activities
  • Lichen and fungal ecology
  • Crystallization and Solubility Studies
  • Synthesis and biological activity
  • Plant tissue culture and regeneration
  • Forest Ecology and Biodiversity Studies
  • Microbial Metabolic Engineering and Bioproduction
  • Composting and Vermicomposting Techniques
  • Phytochemical and Pharmacological Studies
  • Microbial Inactivation Methods
  • Botany and Plant Ecology Studies
  • Essential Oils and Antimicrobial Activity
  • Nematode management and characterization studies
  • Microbial Fuel Cells and Bioremediation
  • Yeasts and Rust Fungi Studies
  • Bryophyte Studies and Records
  • Microbial Metabolites in Food Biotechnology
  • Building materials and conservation

University of Latvia
2015-2024

Latvian State Institute of Wood Chemistry
2024

Riga Stradiņš University
2024

Latvia University of Life Sciences and Technologies
2023-2024

Latvijas Organiskās Sintēzes Institūts
2014

State Education Development Agency
2012

Riga Technical College
2012

The design of multifunctional hydrogels based on bioactive hyaluronic acid (HA) and antibacterial cationic polymer ɛ-poly-l-lysine (ε-PL) is a promising tool in tissue engineering applications. In the current study, we have designed ɛ-polylysine composite hydrogel systems with cell attractive properties. Two distinct crosslinking approaches were used: physical electrostatic attractions chemical charged functional groups (-NH2 -COOH). impact strategy fabricated molecular structure, swelling...

10.1016/j.ijbiomac.2022.03.207 article EN cc-by-nc-nd International Journal of Biological Macromolecules 2022-04-02

Mosses have been neglected as a study subject for long time. Recent research shows that mosses contain remarkable and unique substances with high biological activity. The aim of this study, accordingly, was to analyze the composition screen their antimicrobial anticancer total concentration polyphenols carbohydrates, amount dry residue radical scavenging activity were determined preliminary evaluation chemical moss extracts. In order identify present in mosses, two types extrahents...

10.3390/molecules200917221 article EN cc-by Molecules 2015-09-18

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’,...

10.3390/plants11050642 article EN cc-by Plants 2022-02-26

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...

10.3390/molecules28020863 article EN cc-by Molecules 2023-01-15

Bacterial infections are a prevalent complication after primary viral respiratory and associated with high morbidity mortality. Antibiotics widely used against bacterial pathogens; however, the rise in antibiotic-resistant strains urges us to search for new antimicrobial compounds, including ones that act synergistically antibiotics. In this study, minimal inhibitory (MIC) bactericidal (MBC) concentrations of polyphenol-rich complex green propolis, Tabebuia avellanedae bark, Olea europaea...

10.3390/antibiotics11020160 article EN cc-by Antibiotics 2022-01-26

Fungi colonizing the surface and endosphere of two widespread Poaceae weed species, Avena fatua Echinochloa crus-galli, were isolated to compare taxonomic composition between plant location, year seed collection. The seed-degrading potential Fusarium from seeds was tested by inoculating E. crus-galli with spore suspension. Molecular identification epiphytic endophytic fungal genera performed sequencing ITS region rDNA. Endophytes comprised significantly lower richness compared epiphytes. A...

10.3390/microorganisms11010184 article EN cc-by Microorganisms 2023-01-11

The reduction of tissue cytotoxicity and the improvement cell viability are utmost significance, particularly in realm green chemistry. Despite substantial progress, threat local infections remains a concern. Therefore, hydrogel systems that provide mechanical support harmonious balance between antimicrobial efficacy greatly needed. Our study explores preparation physically crosslinked, injectable, hydrogels using biocompatible hyaluronic acid (HA) ε-polylysine (ε-PL) different weight ratios...

10.3390/polym15081915 article EN Polymers 2023-04-17

10.1016/j.ijfoodmicro.2010.10.001 article EN International Journal of Food Microbiology 2010-10-09

To address the need to reduce consumption and pollution in industrial sector, composite materials were created using a new type of raw materials-organic lake sediments (sapropel) as binder; sphagnum moss, flax fiber, vermiculite filler. The main application these is for sound absorption moisture buffering, but since they contain bio-based binders fillers, also work carbon storage. Within framework this work, total 100 samples created. Fungicides-a biocide quaternary ammonium compound its...

10.3390/ma16031060 article EN Materials 2023-01-25

The antimicrobial activity of aqueous and ethanolic extracts 11 Bryophyta species 9 Marchantiophyta collected in Latvia was tested against Staphylococcus aureus, Escherichia coli Bacillus cereus. extract Lophocolea heterophylla inhibited the growth B. cereus, but none E. coli. 70% bryophyte demonstrated certain relation to S. aureus. In general, 73% 39% exhibited antibacterial highest degree aureus shown by Dicranum scoparium Atrichum undulatum Rhytidiadelphus squarrosus. bactericidal action...

10.4236/aim.2012.23042 article EN Advances in Microbiology 2012-01-01

Entrapment in alginate gel is a widely used approach for immobilization of microorganisms to improve their viability.A natural bacterial association consisting seven strains isolated from acid tar-contaminated soil was gel.The aim this study identify conditions entrapment and determine its prolonged storage.The successfully immobilized 1.5% beads that were 2 mm diameter.All tested treatments, with or without 5% clay, 10% glycerol, incubation prepared nutrient medium 0.2 M solution CaCl ,...

10.22364/eeb.15.09 article EN publisher-specific-oa Environmental and Experimental Biology 2017-01-01

Enterobacter cancerogenus is widely distributed in nature and generally recovered from environmental or vegetal sources. In some cases, it has also been associated with human infections. this study, the complete genomic sequence of virulent E. bacteriophage Enc34 was determined. The genome 60,364 bp length contains 80 open reading frames. To our knowledge, first report a infecting cancerogenus.

10.1128/jvi.01954-12 article EN Journal of Virology 2012-09-20

We report a photo-redox catalyzed radical C–H monofluoromethylation of heterocycles, thus demonstrating this process and the importance monofluoromethyl unit in medicinal drug discovery purposes.

10.1039/d3nj04313d article EN New Journal of Chemistry 2023-01-01
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