Commons:Wiki Science Competition 2023/Winners/Estonia

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People in Science · Microscopy images · Non-photographic media · Wildlife & nature · Astronomy images · General category · Image sets ··· Winners

These are the finalists for WSC2023 in Estonia.

This country-level selection had a specific national organizer and a national coordination page. 81 files were submitted by 19 uploaders.

Jury edit

the selection was performed manually.
coordinator: Kruusamägi.
the jurors were: Jaak Kikas, Ivo Kruusamägi, Ulvar Käärt, Jaan-Juhan Oidermaa, Monika Reppo, Urmas Tartes.

National winners edit

Microscopy images from Estonia
	National winner

	Pupae of the Paracodrus apterogynus in the shell remains of a click beetle (Elateridae) larva. The parasitized wireworm was collected in Estonia on August 27, 2021. Enno Merivee

Finalist	Finalist	Finalist

Recently, it was discovered that various insects with seemingly transparent wings, display vivid structural coloration against dark backgrounds. Wing interference patterns in the banded mosquito Culiseta annulata. Enno Merivee	Microscope image of colloid particles. Artificial opal made by drying a monodisperse sub-micrometer polystyrene sphere solution under a optical darkfield microscope. Siim Pikker	Silver micromirrors imaged with backscattered electrons in an electron microscope. Field of view 105 μm and imaging voltage 30 kV. These crystalline micromirrors are important model systems for micro and nanooptics research. Siim Pikker

Finalist	Finalist	Finalist

Chaoboridae larvae. Janek Lass	Oxidized surface of copper seen under a microscope. Sheet of copper was corroded, the bluish compound is copper(II) carbonate hydroxide. Tavo Romann	A vanadium crystal partially covered with purple (probably vanadium(IV) oxide) and green (some trivalent vanadium salts) corrosion products. Tavo Romann
People in Science images from Estonia
	National winner

	core sampling in a bog in Estonia. Peeter Paaver

Finalist	Finalist	Finalist

Lecture about the largest rocks in Estonia on the northern coast in Tammispea. Peeter Paaver	Dr David T. Jones from Natural History Museum of London giving a practical tutorial about measuring average earthworm count per hectare, thus helping Estonian farmers get an indication about their soil's health. Märt Kose	Patrick Teppor and PEM active layer deposition by ultrasonic spraying. Tavo Romann
Non-photographic media from Estonia
	National winner

	This video shows the property of carbon dioxide to go into a supercritical state with increasing temperature. Initially, a small amount of carbon dioxide was soldered in a small glass ampoule at a pressure of about 70 atmospheres. When the ampoule was heated, the carbon dioxide inside began to pass into a supercritical state, thereby creating an unusual state of matter, not liquid and not gas. After cooling, the opposite effect can be observed, quite spectacular. Maxim Bilovitskiy

Finalist	Finalist	Finalist

Video of silver micromirrors in solution under optical darkfield microscope demonstrating Brownian motion, Casimir effect and colorful scattering of surface plasmons. Diameter of silver micromirrors range from around 2-20 μm. Thickness of the crystalline mirrors is between 100-200 nm. Siim Pikker	Sublimation of iodine under a microscope. The freshly prepared iodine crystals were placed under a microscope, where they started sublimating (i.e. evaporate without becoming liquid) under the influence of the heat of the microscope light. 20x microscope objective was used and bright field contrast. Tavo Romann	Melting an iron nail with a supercapacitor. A 3000 F supercapacitor was short-circuited through an iron nail. A current of 1000 amperes caused the iron nail to melt. Tavo Romann

Finalist	Finalist

Making stainless steel from iron ore by aluminothermy. To better separate the resulting metal from the slag, cryolite and calcium fluoride were added to the mixture. Maxim Bilovitskiy	Slow-motion video of a singing male katydid Conocephalus fuscus. Veljo Runnel
Wildlife & nature images from Estonia
	National winner

	Kostivere Karst field in Ordovician limestone. Peeter Paaver

Finalist	Finalist	Finalist

Travertine terraces in Pamukkale, Turkey. For many thousands of years, water saturated with minerals has left behind a precipitate of calcium salts, mainly from calcium carbonate, thereby forming unusual stepped geological forms. Recently, due to climate change, precipitation in this region has decreased, which caused many travertines to dry up. Maxim Bilovitskiy	Common Blue Damselflies in heart-shaped mating position. The blue male clings the neck of his brown female partner while she curls her abdomen so that their gonads can touch. Photographed in Estonia, Põlva county. Tavo Romann	Outskirts of Longyeabyan (Svalbard) with first snow and low tide. Peeter Paaver
Astronomy images from Estonia
	National winner

	Photo of ionized gas region IC 1396 located in the constellation Cepheus about 2,400 light years away from Earth. The entire region is ionized by the massive star nearby (HD 206267), except for dense globules that can protect themselves from the star's ultraviolet rays. The combined action of the light from the massive star ionizing and compressing the rim of the cloud, and the wind from the young stars shifting gas from the center outward lead to very high compression in the Elephant's Trunk Nebula. This pressure has triggered the current generation of protostars. Taavi Niittee

Finalist	Finalist	Finalist

The Soul Nebula (above) and The Heart Nebula (below) in the constellation Cassiopeia. Taavi Niittee	Andromeda galaxy (M31) in constellation Andromeda. Taavi Niittee	Northern lights in Maardu, Estonia. Maxim Bilovitskiy
General category images from Estonia
	National winner

	Erratic rocks around a peninsula in Northern Estonia. Peeter Paaver

Finalist	Finalist	Finalist

Synthetic diamonds, which had a different shade due to the different content of nitrogen impurities. Maxim Bilovitskiy	A single crystal of a Mn(II) complex, [BnMIm]₄[MnBr4]Br₂. Its bright green color originates from spin-forbidden d-d transitions. Verner Sääsk	Fluorescence of (9H-carbazol-9-yl)(2,4-dichlorophenyl)methanone. Verner Sääsk

Finalist	Finalist

Air is a poor conductor of electricity, but with sufficient voltage (30 kV/cm), air transforms into a conductor, resulting in a spark discharge. AHHAA	TV from 1963. Maxim Bilovitskiy
Image sets from Estonia


	National winner: Organisms found on water. Janek Lass