Publications by authors named "V KOLAR"
Article Synopsis
- - This research investigates the mechanical and thermo-mechanical properties of recycled low-density polyethylene (LDPE) sourced from post-consumer waste, focusing on static and cyclic fatigue testing.
- - The results revealed that the recycled LDPE performed comparably to virgin materials in both static and cyclic tests, with no significant loss in tensile strength and an enhancement in mechanical performance due to the high-quality regranulates produced.
- - Advanced techniques like Fourier Transform Infrared Spectroscopy (FTIR) and Differential Scanning Calorimetry (DSC) confirmed minimal changes in the material's chemical structure and thermal properties between recycled and virgin LDPE.
Article Synopsis
- Wastewater effluents and rising water temperatures from climate change threaten freshwater ecosystems and biodiversity, prompting our study on their combined effects on aquatic communities.
- We conducted a 21-day experiment with various treatments on a simplified freshwater food web, examining impacts on species survival, genetic diversity, and metabolic responses among benthic macroinvertebrates.
- Results showed species-specific sensitivities, particularly in caddisflies and mayflies, where multi-stressor conditions led to reduced lipid content and phylogenetic diversity, indicating the need for molecular indicators to assess immediate ecological impacts.
This work investigates the effect of varying the knitting structure and stitch length (SL) on various thermo-physiological and ergonomic comfort properties of the occupational graduated compression socks. Thermo-physiological comfort, ergonomic comfort and dimensional stability of theses stockings were analysed in a comparative manner. Obtained results were evaluated statistically using the technique of analysis of variance (ANOVA).
View Article and Find Full Text PDFLimited efficiency, lower durability, moisture absorbance, and pest/fungal/bacterial interaction/growth are the major issues relating to porous nonwovens used for acoustic and thermal insulation in buildings. This research investigated porous nonwoven textiles composed of recycled cotton waste (CW) fibers, with a specific emphasis on the above-mentioned problems using the treatment of silicon coating and formation of nanofibers via facile-solution processing. The findings revealed that the use of an economic and eco-friendly superhydrophobic (contact angle higher than 150°) modification of porous nonwovens with silicon nanofibers significantly enhanced their intrinsic characteristics.
View Article and Find Full Text PDFMultiple anthropogenic stressors influence the functioning of lakes and ponds, but their combined effects are often little understood. We conducted two mesocosm experiments to evaluate the effects of warming (+4 °C above ambient temperature) and environmentally relevant concentrations of a mixture of commonly used pharmaceuticals (cardiovascular, psychoactive, antihistamines, antibiotics) on tri-trophic food webs representative of communities in ponds and other small standing waters. Communities were constituted of phyto- and zooplankton and macroinvertebrates (molluscs and insects) including benthic detritivores, grazers, omnivorous scrapers, omnivorous piercers, water column predators, benthic predators, and phytophilous predators.
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