Extraordinary occurrence of Pallas’s leaf warbler (Phylloscopus proregulus Pallas, 1811) in Bulgaria and the Balkan Peninsula in the autumn and winter of 2022/2023

Autor: Peter Shurulinkov, Patrick Bergkamp, Nikola Alexandrov, Ivaylo Tonev, Rosena Tomova, Pavel Simeonov, Biliana Konakchieva, Stela-Teodora Trendafilova, Boris Hotinov

Publikováno v: Historia naturalis bulgarica, Vol 45, Iss 5, Pp 143-147 (2023)

Four Pallas’s leaf warblers (Phylloscopus proregulus) were captured at Durankulak ringing camp, NE Bulgaria, in frames of four days between 12 and 16 October 2022. The species is a rare vagrant in Bulgaria and neighbouring Balkan countries. It has

Externí odkaz: https://doaj.org/article/b8b7c55a76ba4d1a85e1f66c0df3c69a

Capillary meniscus dynamometry - Method for determining the surface tension of drops and bubbles with isotropic and anisotropic surface stress distributions

Autor: Eddie G. Pelan, Nikola Alexandrov, Theodorus Berend Jan Blijdenstein, Krassimir D. Danov, Krastanka G. Marinova, Simeon D. Stoyanov, Peter A. Kralchevsky, Rumyana D. Stanimirova

Publikováno v: Journal of Colloid and Interface Science 440 (2015)
Journal of Colloid and Interface Science, 440, 168-178
Journal of Colloid and Interface Science

The stresses acting in interfacial adsorption layers with surface shear elasticity are, in general, anisotropic and non-uniform. If a pendant drop or buoyant bubble is covered with such elastic layer, the components of surface tension acting along th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4aba8e74e9506607b20b75b170d3109d
https://research.wur.nl/en/publications/capillary-meniscus-dynamometry-method-for-determining-the-surface

Instrument and methods for surface dilatational rheology measurements

Autor: Krastanka G. Marinova, Nikolai D. Denkov, Krassimir D. Danov, Vassil Vulchev, Stoyan C. Russev, Lyudmil Lyutov, Nikola Alexandrov, Christine Bilke-Krause

Publikováno v: Review of Scientific Instruments. 79:104102

We describe an instrument combining the advantages of two methods, axisymmetric drop shape analysis for well-deformed drops and capillary pressure tensiometry for spherical drops, both used for measuring the interfacial tension and interfacial rheolo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::89e4b9b84748e266dae99697f128b93b
https://doi.org/10.1063/1.3000569