Valda Valkovska

ORCID: 0000-0002-8508-2740
Publications
Citations
Views
---
Saved
---
About
Contact & Profiles
Research Areas
  • Bone Tissue Engineering Materials
  • Phase Equilibria and Thermodynamics
  • Phytochemicals and Antioxidant Activities
  • Ionic liquids properties and applications
  • Catalysis and Oxidation Reactions
  • Moringa oleifera research and applications
  • Horticultural and Viticultural Research
  • Microbial Metabolites in Food Biotechnology
  • melanin and skin pigmentation
  • Magnesium Alloys: Properties and Applications
  • Microbial Fuel Cells and Bioremediation
  • Metal and Thin Film Mechanics
  • Plant tissue culture and regeneration
  • Renal function and acid-base balance
  • Body Composition Measurement Techniques
  • Dyeing and Modifying Textile Fibers
  • Bee Products Chemical Analysis
  • Essential Oils and Antimicrobial Activity
  • Dental materials and restorations
  • Plant Physiology and Cultivation Studies
  • Berry genetics and cultivation research
  • Transgenic Plants and Applications
  • Legume Nitrogen Fixing Symbiosis
  • Dental Implant Techniques and Outcomes

University of Latvia
2018-2022

In this study, a phosphate solubilizing microorganism was isolated from the soil of an agricultural field in Lithuania. Based on 16S rRNA gene sequence analysis, strain identified as Bacillus sp. and submitted to NCBI database, Sector Applied Bio-catalysis, University Institute Biotechnology, Vilnius, Lithuania allocated accession number KY882273. The assigned with MVY-004. culture nutrient medium growth conditions were optimized: molasses used carbon source; yeast extract powder organic...

10.3390/biology11020254 article EN cc-by Biology 2022-02-07

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

The branching of ionic liquid cation sidechains utilizing silicon as the backbone was explored and it found that this structural feature leads to fluids with remarkably low density viscosity.

10.1039/d2sc01696f article EN cc-by-nc Chemical Science 2022-01-01

In the research chokeberries from five different geographic regions of Latvia were analysed. All collected samples split in two parts: one them was frozen and second part dried. Then extracts prepared or dried berries 70% ethanol/water 10% glycerol/ethanol 50% – 95% ethanol/water/HCl mixtures. The total phenolic content for determined using Folin-Ciocalteu method, flavonoid by rutin as standard antioxidant activity DPPH method. To identify quantify chemical compounds chokeberries, analyses...

10.4028/www.scientific.net/kem.850.184 article EN Key engineering materials 2020-06-01

Sr-incorporated calcium phosphate coatings were deposited on Mg–0.8 wt. % Ca alloy by the micro–arc oxidation method under process voltages of 350–500 V, with using Sr-substituted tricalcium (Sr-TCP) and hydroxyapatite (Sr-HA). The current density for MAO Sr-HA deposition was higher than that Sr-TCP deposition. coating morphology, microstructure compositions have been studied scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX) X–ray diffraction (XRD). phase...

10.1063/1.5083512 article EN AIP conference proceedings 2018-01-01

The study will present results of chemical analysis mass spectrometry, evaluating the content pigments in M. domestica leaves dyeing solution and dyed woollen yarn nowadays. Yarn was with fresh tree. Before treated potassium aluminium sulphate mordant. Dyestuffs from were extracted compliance modified hydrochloric method hydrolysis. Extracts analysed by ultra high-performance liquid chromatography coupled a diode array detector spectrometry (UHPLC-DAD-MS) for identification pigments....

10.4028/www.scientific.net/kem.903.63 article EN Key engineering materials 2021-11-10

Synthetic hydroxyapatite (HAp) has weak antibacterial and mechanical properties. The activity of HAp can be enhanced by strontium cation substitution incorporation peroxide ion via hydrothermal processing at 100 °C 150 temperature using 50% H 2 O solution. starting reagents products were analyzed thermal conversion elemental analyser – isotopic ratio mass spectrometer in order to determine the δ 18 values. Using different host materials it could possible differences values between untreated...

10.4028/www.scientific.net/kem.762.14 article EN Key engineering materials 2018-02-01

We have explored the branching of ionic liquid cation sidechains utilizing silicon as backbone and found this structural feature to lead fluids remarkably low density viscosity. The relatively densities suggest a large free volume in these liquids. Argon solubility was measured using precise saturation method probe relative volumes. that argon molar solubilities were slightly higher liquids with alkylsilane siloxane groups within cation, compared carbon-based branched groups. anion size,...

10.26434/chemrxiv-2022-br6r2 preprint EN cc-by-nc-nd 2022-03-29
Coming Soon ...