Shared Knowledge/Projects/Wikiexperiments

Wikiexperiments (Викиексперименти) is a project by Shared Knowledge aimed at recording high-quality videos of systematically selected experiments for the purposes of illustrating important scientific concepts and phenomena in various sciences. This is an ongoing project that started in September 2015.

Logo of Wikiexperiments

Physics videos from the Institute of Physics, Skopje

In December 2015 Shared Knowledge uploaded the first round of high-definition videos of experiments conducted to demonstrate various laws and principles of physics. These 25 demonstrations were performed by Prof. Oliver Zajkov at the Physics Institute at the Ss. Cyril and Methodius University of Skopje, as part of a WikiExperiments project by Shared Knowledge.

The experiments are described in Macedonian and English, and added to articles on the Macedonian and English Wikipedia. Some of them also found their way in other language editions too.

On October 26 and 27 2020, the second season of filming physics experiments has started. Again in collaboration with the professor Oliver Zajkov from the Institute of Physics at the Faculty of Natural Science and Mathematics at the University "Ss. Cyril and Methodius", 12 experiments were recorded. Then on December 14, the third time was realized with the 11 new experiments, with a total result of 23 experiments. This engagement was supported by the "Gothe-Institut" which is a abroad cultural institution of Federal Republic of Germany that operates in learning the German language and nursing the international cultural collaboration. That's why most of the covered experiments were discovered by German scientists such as Julius Plücker, Johann Wilmhelm Hittorf, Eugen Goldstein, Gustav Kirchhoff, Georg Ohm, Johann Christian Poggendorff, Heinrich Geißler...

In 2021, 15 experiments were able to be covered, again with the help of professor Oliver Zajkov from the Institute of Physics, FNSM, Skopje.

Physics gallery

These are the videos of the physics experiments uploaded to Wikimedia Commons. They are described in Macedonian and English, but we would dearly appreciate if the descriptions can be translated in as many languages as possible and placed in their relevant articles on various Wikipedias. The thumbnail descriptions below each video here are short, and merely give an idea about their meaning. Each has a detailed description on its file page.

Note: Clicking on each description under the thumbnail will lead you to the file page with proper full description of the video.

• Suspended weight showing inertia.
• "Pistol Test Tube" experiment
• Reaction force of the Arhimedes's law
• Floating and sinking test tube
• Glass funnel vacuum action
• Paper sticking in differential pressure
• Angular kinetic energy paper roll
• Viscosity of liquids
• Evaporation cooling with ethanol
• Temperature-pressure dependence in boiling
• Glow discharge in low-pressure tube
• Electrostatic induction
• Electric field force lines
• Demonstration of Ohm's law
• Magnetic field force lines
• Ørsted's law with compass needle and wire
• Ampère's force law
• Lenz's law with electromagnet
• Waltenhofen’s pendulum for eddy current
• Lenz's law with bar magnet and two rings
• Tesla coil wirelessly lighting a neon tube
• Acoustic resonance with tuning forks
• Light radiation pressure with Crookes radiometer
• Moment of inertia with rotating chair
• Spherical aberration
• Dependence of the focal length on the refractive index
• Laser spherical aberration
• Photoeffect
• Ohm's law for part of a circuit
• Ohm's law of electrical resistance
• Figure in a flat mirror
• Refraction of light
• Refraction of light
• Fracture through planar parallel plate
• Boiling under reduced pressure
• Free rotation of a rigid body
• Rotation of a chain
• Rotation of a ring
• Cathode rays
• Geisler's tubes
• Electromagnetic induction
• Acoustic resonance with tuning forks
• Digital acoustic resonance
• Resonance of mathematical pendulums
• Absolute black body radiation
• Kirchhoff's law
• Acoustic resonance with tuning forks
• Polarization at reflection of a pyramid
• Polarization at reflection of a flat glass
• Diffraction mesh
• Diffraction of a CD and DVD
• Lorentz Force with an oscilloscope
• Magnetic field of а straight conductor
• Poggendorff weigh
• Optical lens
• Archimedes' law in an air
• Influence of an atmospheric pressure
• Sound resonance of an air column
• Magnetic field of а solenoid
• Net force
• Net force
• Standing waves

Translation to other languages

Shared Knowledge would be very grateful to the wider Wikimedia community if the descriptions of these scientific videos can be translated from English to as many languages as possible and inserted into the relevant articles on those Wikipedias.

№	Article	en	az	ba	be	be -t	bs	bg	crh	cs	cv	de	el	eo	et	hr	hu	hy	hyw	ka	kk	lt	lv	mk	mt	myv	pl	ro	roa-rup	ru	sh	sk	sl	sq	sr	tr	tt	uk	vro	Σ	Wikidata	st.
1	inertia	+	+	–	+	–	+	+	–	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	–	+	–	29	Q122508	5	+
2	vapor pressure	+	–	–	+	–	–	+	–	–	+	+	+	+	+	–	+	+	–	–	–	–	–	+	–	–	+	+	–	+	+	–	+	–	+	+	–	+	–	19	Q2661322	8	+
3	Archimedes (287 BCE–212 BCE)	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	37	Q8739	30	+
4	buoyancy	+	+	–	+	–	+	+	–	+	–	+	+	–	+	+	+	–	–	–	–	–	–	–	–	–	+	+	–	+	+	–	+	+	+	+	–	+	–	20	Q6497624	7	+
5	suction	+	–	–	–	–	–	–	–	+	–	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	+	–	5	Q1790295	5	+
6	Bernoulli's principle	+	+	–	+	–	+	+	–	+	–	+	+	–	+	+	+	+	–	–	+	+	+	+	–	–	+	+	–	+	+	+	+	–	+	+	–	+	–	25	Q181328	13	+
7	rotational energy	+	–	–	–	–	–	–	–	+	–	+	–	–	–	–	–	–	–	–	–	–	+	–	–	–	–	+	–	+	–	–	–	+	–	–	–	–	–	7	Q2140940	8	+
8	Magnus effect	+	–	–	+	+	–	+	–	+	–	+	+	–	–	–	+	–	–	–	+	–	+	–	–	–	+	+	–	+	–	+	–	–	+	+	–	+	–	17	Q622975	6	+
9	viscosity	+	+	–	+	–	+	+	–	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	–	+	+	+	–	+	+	+	+	+	+	+	–	+	–	30	Q128709	14	+
10	evaporation	+	+	–	+	–	+	+	–	+	+	+	+	+	+	+	+	+	–	–	+	+	+	+	–	–	+	+	–	+	+	+	+	–	+	+	–	+	–	27	Q132814	10	+
11	boiling point	+	+	–	+	+	+	+	–	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	–	+	–	30	Q1003183	11	+
12	cathode ray	+	–	–	+	–	–	+	–	+	–	+	+	–	+	+	+	–	–	–	–	+	–	–	–	–	–	+	–	+	+	–	+	–	+	+	–	+	–	17	Q207340	3
13	electric glow discharge	+	–	–	–	–	–	+	–	+	+	+	–	–	+	–	–	–	–	–	+	–	+	–	–	–	+	–	–	+	–	–	–	–	–	+	+	+	–	13	Q1427934	4	+
14	electroscope	+	–	–	+	+	–	–	–	+	–	+	+	–	+	+	–	–	–	–	+	+	–	+	–	–	+	–	–	+	+	–	+	–	+	+	+	+	–	19	Q130962	4	+
15	electrostatic induction	+	+	–	–	–	–	+	–	+	–	+	–	–	+	+	–	–	–	–	+	–	+	+	–	–	+	–	–	+	+	–	–	–	+	+	–	+	–	16	Q841249	4	+
16	electric field	+	+	–	+	+	+	+	–	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	+	+	–	31	Q46221	6	+
17	Ohm's law	+	+	–	+	–	+	+	–	+	+	+	+	+	+	+	+	+	–	–	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	+	+	–	29	Q41591	9	+
18	field line	+	–	–	–	–	–	+	–	–	–	+	–	+	+	+	–	+	–	–	+	–	–	+	–	–	–	–	–	+	+	–	–	–	+	–	–	+	–	13	Q1810738	4	+
19	Oersted's law	+	–	–	–	–	–	–	–	–	–	–	–	–	+	+	+	–	–	–	–	–	–	–	–	–	+	–	–	+	–	–	–	–	–	–	–	+	–	7	Q3733130	6	+
20	Ampère's force law	+	+	–	+	–	–	–	–	+	+	+	–	+	+	–	–	+	–	–	–	–	+	+	–	–	+	–	–	+	–	–	–	–	–	–	+	+	–	15	Q2359410	8	+
21	Lenz's law	+	–	–	+	–	+	+	–	+	+	+	+	+	+	+	+	+	–	+	–	–	–	+	–	–	+	+	–	+	+	+	+	–	+	+	–	+	–	24	Q192288	4	+
22	eddy current	+	–	–	–	–	–	+	–	+	–	+	–	+	+	+	+	+	–	–	–	–	+	+	–	–	+	+	–	+	+	+	–	–	+	+	–	+	–	19	Q208598	4	+
23	alternating current	+	+	–	+	+	+	+	–	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	–	+	–	30	Q124164	9	+
24	Tesla coil	+	+	–	–	–	–	–	–	+	–	+	+	+	+	+	+	–	–	+	–	–	–	–	–	–	+	+	–	+	+	+	–	–	+	+	–	+	–	18	Q622424	9	+
25	Nikola Tesla (1856–1943)	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	–	–	+	+	+	+	+	+	+	+	+	+	+	+	–	35	Q9036	42	+
26	sound	+	+	+	+	+	+	+	–	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	–	+	+	+	–	+	+	+	+	+	+	+	–	+	+	34	Q11461	10	+
27	resonance	+	+	–	+	+	+	+	–	+	+	+	+	+	+	+	+	+	–	+	+	+	–	+	–	+	+	+	–	+	+	–	+	+	+	+	–	+	–	29	Q172858	6	+
28	acoustic resonance	+	–	–	–	–	–	–	–	–	–	–	–	–	+	+	–	–	–	–	–	–	–	+	–	–	+	–	–	–	+	–	–	–	–	+	–	+	–	8	Q2558427	3	+
29	Crookes radiometer	+	–	–	–	–	–	–	–	+	–	+	–	+	–	–	–	–	–	–	–	–	–	–	–	–	+	–	–	+	–	+	–	–	–	–	–	+	–	8	Q1334758	6	+
30	moment of inertia	+	–	–	+	+	+	+	–	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	+	+	–	30	Q165618	10	+
31	lens	+	+	–	+	+	+	+	–	+	–	+	+	+	+	+	+	+	–	–	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	+	+	–	29	Q768575	15	+
32	spherical aberration	+	–	–	–	–	–	+	–	+	–	+	+	–	–	+	+	–	–	+	+	–	–	–	–	–	+	+	–	+	–	+	+	–	+	+	–	+	–	17	Q2913798	1
33	refractive index	+	+	–	+	–	+	+	–	+	+	+	+	+	+	+	+	+	–	–	+	+	+	+	–	–	+	+	–	+	+	+	+	–	+	+	–	+	–	27	Q174102	13	+
34	focus	+	–	–	+	–	+	+	–	–	–	+	–	+	+	+	–	+	–	–	+	–	+	+	–	–	+	+	–	+	+	+	+	–	+	+	–	+	–	21	Q190909	4	+
35	focal length	+	–	–	+	–	–	+	–	+	–	+	+	+	+	+	+	–	–	–	–	+	–	–	–	–	+	+	–	+	+	+	+	–	+	+	–	+	–	20	Q193540	9	+
36	laser	+	+	+	+	+	+	+	–	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	+	+	+	33	Q38867	10	+
37	photoelectric effect	+	+	+	+	–	+	+	–	+	–	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	–	+	–	29	Q83213	5	+
38	electrical network	+	–	–	+	–	+	+	–	+	+	+	+	+	+	+	+	+	–	–	–	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	–	+	–	26	Q132629	11	+
39	electrical resistance	+	+	–	+	+	+	+	–	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	–	+	+	+	+	–	+	+	–	29	Q25358	16	+
40	plane mirror	+	–	–	–	–	–	–	–	–	–	+	–	–	+	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	+	+	–	–	–	6	Q964338	1
41	refraction	+	+	–	+	–	–	+	–	+	+	+	+	+	+	+	+	+	–	–	+	+	+	+	–	–	+	+	–	+	+	–	+	–	+	+	–	+	–	25	Q72277	6	+
42	light	+	+	+	+	+	+	+	–	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	–	–	+	+	+	+	+	+	+	+	+	+	+	+	+	35	Q9128	14	+
43	wave	+	+	–	+	+	+	+	–	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	–	+	–	30	Q37172	8	+
44	birefringence	+	–	–	+	–	+	+	–	–	–	+	–	+	+	+	–	–	–	–	–	–	–	+	–	–	+	+	–	+	+	+	+	–	–	+	–	+	–	17	Q108779	2	+
45	boiling point	+	+	–	+	+	+	+	–	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	–	+	–	30	Q1003183	11	+
46	pressure	+	+	–	+	+	+	+	–	+	–	+	+	+	+	+	+	+	–	+	+	+	+	+	–	+	+	+	–	+	+	+	+	+	+	+	+	+	–	31	Q39552	15	+
47	rotation	+	–	–	–	–	+	+	–	+	+	+	+	+	+	+	+	–	–	–	+	–	+	+	–	–	+	+	–	+	+	–	+	–	+	+	–	+	–	22	Q107617	10	+
48	cathode ray	+	–	–	+	–	–	+	–	+	–	+	+	–	+	+	+	–	–	–	–	+	–	–	–	–	–	+	–	+	+	–	+	–	+	+	–	+	–	17	Q207340	3
49	cathode ray tube	+	+	–	–	–	–	+	–	+	–	+	+	+	+	+	+	–	–	–	–	+	+	–	–	–	–	+	–	+	+	+	+	–	+	+	–	+	–	20	Q83913	10	+
50	Geissler tube	+	–	–	–	–	–	–	–	–	–	+	–	–	–	+	–	–	–	–	–	–	–	–	–	–	+	+	–	–	+	–	+	–	–	–	–	+	–	8	Q537792	5	+
51	electromagnetism	+	–	–	–	–	+	+	–	+	–	+	–	+	+	+	+	+	–	+	–	–	+	+	–	–	+	+	–	+	+	+	+	+	+	+	+	+	–	24	Q11406	9	+
52	electromagnetic induction	+	+	–	+	+	+	+	–	+	+	+	+	+	+	+	+	+	–	–	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	–	+	–	29	Q988780	10	+
53	beat	+	–	–	–	–	–	+	–	+	+	+	–	–	+	–	+	–	–	–	–	–	–	–	–	–	+	–	–	+	–	–	–	–	–	–	–	+	–	10	Q829522	5	+
54	pendulum	+	–	–	+	–	–	–	–	+	+	+	–	+	+	–	+	+	–	–	+	+	+	–	–	–	+	–	–	+	+	+	+	–	+	–	–	+	–	19	Q829360	2	+
55	radiation	+	+	–	+	+	+	+	–	+	+	+	+	+	+	+	–	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	–	+	+	30	Q18335	7	+
56	electromagnetic radiation	+	+	+	+	+	+	+	–	+	+	+	+	+	+	+	+	+	–	+	–	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	–	+	+	31	Q12969754	11	+
57	black-body radiation	+	–	–	–	–	–	–	–	–	–	+	–	+	+	+	+	–	–	–	–	–	–	–	–	–	–	–	–	–	+	–	–	–	+	+	–	+	–	10	Q900097	4	+
58	black body	+	+	–	+	–	+	+	–	+	+	+	+	+	+	+	–	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	–	+	+	–	+	–	27	Q161424	6	+
59	Gustav Kirchhoff (1824–1887)	+	+	–	+	+	+	+	–	+	–	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	+	+	–	30	Q60052	25	+
60	Kirchhoff's circuit laws	+	+	–	+	–	–	+	–	+	+	+	+	+	+	+	+	+	–	–	+	–	+	+	–	–	+	+	–	+	+	+	+	+	+	+	+	+	–	27	Q187672	5	+
61	polarization	+	–	–	+	–	–	+	–	+	–	+	+	+	+	+	+	+	–	–	–	+	–	+	–	–	+	+	–	+	+	–	+	–	+	+	+	+	–	22	Q193760	3	+
62	diffraction	+	+	–	+	–	–	+	–	+	+	+	+	+	+	+	+	+	–	–	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	–	+	–	27	Q133900	4	+
63	diffraction grating	+	–	–	+	–	–	+	–	+	–	+	–	–	+	+	–	+	–	–	+	+	–	–	–	–	+	–	–	+	–	+	+	–	+	+	–	+	–	17	Q653294	6	+
64	Lorentz force	+	+	–	+	+	–	+	–	+	+	+	+	+	+	+	+	+	–	+	+	–	+	+	–	–	+	+	–	+	+	+	+	+	+	+	+	+	–	29	Q172137	10	+
65	oscilloscope	+	+	–	+	+	+	+	–	+	–	+	+	+	+	+	+	+	–	+	+	+	+	–	–	–	+	+	–	+	+	+	+	+	+	+	–	+	–	28	Q174320	13	+
66	Johann Christian Poggendorff (1796–1877)	+	–	–	–	–	–	+	–	–	–	+	–	+	–	–	+	–	–	–	–	–	–	–	–	–	+	–	–	+	–	–	–	+	–	–	–	+	–	9	Q61197	24	+
67	Archimedes' principle	+	+	–	+	–	–	+	–	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	+	+	–	29	Q181404	7	+
68	vacuum	+	+	+	+	+	+	+	–	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	+	+	–	32	Q11475	10	+
69	net force	+	–	–	+	–	–	–	–	–	–	+	+	–	+	–	–	–	–	–	–	–	–	–	–	–	+	+	–	–	–	–	–	–	–	+	–	+	–	9	Q868425	3
70	vector	+	+	–	–	–	–	–	–	–	+	–	+	–	–	–	–	+	–	–	–	–	–	–	–	–	–	+	–	+	–	–	–	–	–	–	–	+	–	8	Q13471665	7	+
71	vector notation	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	1	Q7917835	1
72	standing wave	+	–	–	+	–	–	+	–	+	+	+	+	+	+	+	+	+	–	+	+	+	+	–	–	–	+	+	–	+	+	+	–	–	–	+	+	+	–	24	Q123300	6	+
73	interference	+	+	–	+	–	+	+	–	+	+	+	+	+	+	+	+	+	–	–	–	+	+	+	–	–	+	+	–	+	+	+	+	–	+	+	+	+	–	27	Q136980	7	+
74	solenoid	+	–	–	–	–	–	+	–	+	+	+	+	+	+	–	–	+	–	–	+	+	–	–	–	–	+	–	–	+	+	–	–	+	+	+	–	+	–	18	Q245739	5	+
75	magnetic field	+	+	+	+	+	+	+	–	+	–	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	+	+	–	31	Q11408	7	+
76	coil	+	–	–	–	–	–	–	–	–	+	+	–	+	–	–	–	–	–	–	–	+	–	–	–	–	+	–	–	+	–	–	–	–	–	+	–	+	–	9	Q2981904	9	+
77	electromagnet	+	+	–	+	–	–	+	–	+	+	+	+	+	+	+	+	+	–	–	–	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	–	+	–	26	Q178032	7	+
Σ	→ Autolist→ gallery→ timeline	77	42	9	54	25	38	61	2	63	42	73	55	57	67	62	56	51	3	31	46	47	49	50	1	5	67	59	3	71	60	50	55	37	61	64	23	74	6	1,696	avg: 22\45\58%	650

Chemistry videos from the Institute of Chemistry, Skopje

The experiments are described in Macedonian and English, and added to articles on the Macedonian and English Wikipedia. Some of them also found their way in other language editions too.

In June 2016 Shared Knowledge uploaded the first round of high-definition videos of experiments conducted to demonstrate various reactions in chemistry. These 20 demonstrations and experiments were performed by Prof. Vladimir Petruševski at the Institute of Chemistry at the Ss. Cyril and Methodius University of Skopje, as part of a WikiExperiments project by Shared Knowledge.

On January 22 2020, in collaboration with Professors Vladimir Petruševski, Marina Stojanovska and Miha Bukleski from the Institute of Chemistry at the Faculty of Natural Sciences and Mathematics at the University "Ss. Cyril and Methodius", have 22 recorded experiments of chemistry.

Filming videos within the Wikiexperiments project has continued on July 6, 2021. That day, at the Institute of Chemistry, with the help and demonstration of two professors - Vladimir Petruševski, Marina Stojanovska; and one associate professor/docent - Miha Bukleski, we managed to cover 18 chemistry in span of four hours. On 25th of October, Shared Knowledge again collaborated these chemistry professors at Faculty of Natural Sciences and Mathematics. In this occasion, we were able to record 5 chemistry experiments. The last date of filming experiments in 2021 was on November 9, by recording 5 videos with the help of now retired professor Vladimir Petruševski and Marina Stojanovska.

On June 1, 2022, from 10 AM to 12 PM, at the Institute of Chemistry were recorded 8 chemistry experiments that were =performed by Vladimir Petruševski and Marina Stojanovska.

On February 13, from 10 am to 1:30 pm, we were again at the Institute of Chemistry where we recorded 18 chemical experiments. The experiments were planned and performed by the retired Prof. PhD- Vladimir Petrushevski, the Prof. PhD Miha Bukleski, and the students Mihail Trajkov and Darko Stojčev.

Chemistry gallery

These are the videos of the chemistry experiments uploaded to Wikimedia Commons. They are described in Macedonian and English, but we would dearly appreciate if the descriptions can be translated in as many languages as possible and placed in their relevant articles on various Wikipedias. The thumbnail descriptions below each video here are short, and merely give an idea about their meaning. Each has a detailed description on its file page.

Note: Clicking on each description under the thumbnail will lead you to the file page with proper full description of the video.

• Direct synthesis of aluminum bromide
• Reaction of the product Al2Br6 with water
• Burning of sulfur in oxygen
• Preparation of amorphous silicon and magnesium silicide
• Magnesium silicide is added to 10% hydrochloric acid
• Direct synthesis of aluminum iodide
• Dehydration properties of concentrated sulfuric acid
• Direct synthesis of ammonium chloride
• Slaking of quicklime as a strongly exoenergetic reaction
• Oxidation of a piece of charcoal in molten potassium nitrate
• Synthesis of a basic oxide
• Disproportionation reaction
• Catalytic decomposition of hydrogen peroxide
• 'Elephant toothpaste'
• Large amount of energy released upon combustion of ethanol
• Reaction between a strong oxidizing and a reducing agent
• Explosive properties of three different explosives
• Leidenfrost effect
• Explosion of a hydrogen–air mixture
• Phenomenon of discontinuous thermochromism
• Does water always put out fire?
• Endothermic reaction
• Artificial snow with Natrium polyacrylate
• Carbon dioxide with lime water
• Döbereiner's lighter
• Burning of Zn, Fe, Mg, Al, Cu, Se, Ni
• Simple titration
• Extrusion reaction
• 'Magic drinks'
• Reaction of Copper (II) oxide with sulfuric acid
• Implosion of a soda can
• Crystallization of sodium acetate
• Silver mirror
• Catalytic oxidation of ammonia
• Reaction of lithium with water
• Reaction of sodium with water
• Reaction of potassium with water
• Reaction of lithium with sulfuric acid
• Reaction of sodium with sulfuric acid
• Reaction of potassium with sulfuric acid
• Explosion of hydrogen
• Hydrogen-made sounds
• Chemical luminescence
• Nickel complexes
• Marble on ember
• Lamp in liquid nitrogen
• 'Fire balls'
• Potassium chlorate and sugar (gummy bear)
• 'Canon blow'
• 'Magic spoon' (Wood's alloy)
• 'Pharaoh snake'
• Ethanol in a bottle
• Aluminothermia
• Paranitroaniline
• Copper mirror
• High temperature superconductivity
• Rose in liquid nitrogen
• Rubber hose in liquid nitrogen
• 'Lollypop cameleon'
• Alcohol in liquid nitrogen and its combustion
• Dehydration and hydration of Copper(II) sulfate
• Direct synthesis of iron and sulfur
• How much oxygen is in an air?
• Hydrochloric acid with various metals
• Dehydrating properties of sulfur
• Properties of nascent hydrogen
• Direct synthesis of zinc Sulfide
• Burning magnesium under water
• Volume contraction
• Pyrophoric iron
• Mixture of metal powder in flame
• Obtaining sodium amalgam
• Obtaining ammonium amalgam
• Detonation of a mixture of red phosphorus and potassium chlorate
• Oxidation states of vanadium
• Lighting gunpowder with a laser
• Direct synthesis and hydrolysis of aluminum phosphide
• Reduction of lead (II) oxide with charcoal
• Oscillating reactions
• Electrochemical element - a battery
• Rubber dissolved in essential oils
• Burning of essential oils
• Flame tests
• Flour can burn
• Self-ignition of a mixture of sugar and potassium chlorate with a drop of concentrated sulfuric acid
• Catalytic oxidation of ammonia
• Reduction of iodate with disulfite with and without starch as an indicator
• Generation and combustion of phosphine
• Mercury beating heart
• Oxidation properties of manganese(VII) oxide
• Glucose traffic light
• Fake blood
• Barking dog reaction
• Sound frequency in various gases
• Properties of sulfur hexafluoride
• Ethyne + chlorine, an addition reaction

Translation to other languages

Shared Knowledge would be very grateful to the wider Wikimedia community if the descriptions of these scientific videos can be translated from English to as many languages as possible and inserted into the relevant articles on those Wikipedias.

№	Article	en	az	ba	be	be -t	bs	bg	crh	cs	cv	de	el	eo	et	hr	hu	hy	hyw	ka	kk	lt	lv	mk	mt	myv	pl	ro	roa-rup	ru	sh	sk	sl	sq	sr	tr	tt	uk	vro	Σ	Wikidata	st.
1	aluminum bromide	+	–	–	–	–	–	–	–	+	–	+	–	–	–	–	–	–	–	–	–	–	–	+	–	–	+	–	–	+	+	+	–	–	+	+	–	–	–	10	Q259311	14	+
2	sulfur trioxide	+	+	–	–	–	+	+	–	+	–	+	+	+	+	+	+	+	–	+	–	+	+	+	–	–	+	+	–	+	+	+	+	–	+	+	–	+	–	25	Q242715	15	+
3	magnesium silicide	+	–	–	–	–	–	–	–	+	–	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	+	+	–	–	–	+	–	–	–	–	6	Q421028	7	+
4	aluminum iodide	+	–	–	–	–	–	–	–	+	–	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	+	+	+	–	–	+	–	–	–	–	7	Q159096	13	+
5	sulfuric acid	+	+	–	+	+	+	+	–	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	+	+	–	31	Q4118	28	+
6	ammonium chloride	+	–	–	–	–	+	+	–	+	–	+	+	+	+	+	+	+	–	+	+	–	+	–	–	–	+	+	–	+	+	+	+	–	+	+	–	+	–	23	Q188543	26	+
7	calcium oxide	+	+	–	–	–	+	+	–	+	+	+	+	+	+	+	+	+	–	–	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	–	+	–	27	Q185006	22	+
8	potassium nitrate	+	+	–	–	–	+	+	–	+	+	+	+	+	+	+	+	+	–	–	+	+	+	+	–	–	+	+	–	+	+	+	+	–	+	+	–	+	–	26	Q177836	17	+
9	half-reaction	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	+	–	+	+	–	–	–	+	–	–	+	–	6	Q2272343	4	+
10	ammonium dichromate	+	–	–	–	–	–	+	–	+	–	+	–	+	+	–	+	+	–	–	–	–	+	–	–	–	+	–	–	+	+	+	+	–	+	+	–	–	–	16	Q422430	12	+
11	chemical decomposition	+	–	–	–	–	–	+	–	+	+	+	+	–	+	–	+	–	–	–	–	–	–	–	–	–	+	+	–	+	+	–	–	+	+	–	–	+	–	15	Q192036	4	+
12	elephant's toothpaste	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	+	–	3	Q5359401	6	+
13	combustion	+	+	–	+	–	+	+	–	+	+	+	+	+	+	+	+	+	–	+	+	+	+	–	–	–	+	+	–	+	+	+	+	+	+	+	–	+	–	28	Q133235	10	+
14	redox	+	–	+	+	+	+	+	–	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	+	+	–	31	Q82682	9	+
15	explosive chemicals	+	+	+	+	+	+	+	–	+	–	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	–	+	+	31	Q12870	11	+
16	Leidenfrost effect	+	–	–	+	–	–	–	–	+	–	+	+	+	–	+	+	–	–	–	–	–	–	–	–	–	+	–	–	+	–	–	+	+	+	+	–	+	–	15	Q654136	5	+
17	hydrogen	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	–	37	Q556	34	+
18	thermochromism	+	–	–	–	–	–	–	–	–	–	+	+	+	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	+	+	–	–	+	–	+	–	9	Q899581	2	+
19	magnesium	+	+	+	+	+	+	+	–	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	+	+	+	+	+	+	+	+	+	+	–	33	Q660	27	+
20	endothermic reaction	+	–	–	–	–	–	–	–	+	–	+	+	+	+	–	+	+	–	–	+	–	–	–	–	–	+	+	–	+	–	+	+	+	–	+	–	+	–	17	Q203522	3
21	acrylate polymer	+	+	–	–	+	–	–	–	+	–	+	–	–	–	–	–	+	–	–	+	–	–	–	–	–	+	–	–	+	–	–	–	–	–	–	–	+	–	10	Q423145	7	+
22	diaper	+	–	–	–	–	–	+	–	+	+	+	+	+	+	+	+	+	–	–	–	+	–	–	–	–	+	–	–	+	–	+	+	–	+	+	–	+	–	19	Q187359	7	+
23	limestone	+	+	+	+	+	+	+	–	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	+	–	+	+	–	+	+	+	+	–	+	+	+	+	–	32	Q23757	17	+
24	Johann Wolfgang Döbereiner (1780–1849)	+	–	–	+	–	–	–	–	+	–	+	–	+	–	+	+	+	–	+	+	–	+	+	–	–	+	–	–	+	–	–	–	+	+	+	–	+	–	18	Q63690	22	+
25	Döbereiner's lamp	+	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	+	–	–	+	–	–	–	–	–	–	–	+	–	5	Q902872	6	+
26	zinc	+	+	+	+	+	+	+	–	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	+	+	+	+	+	+	+	+	+	36	Q758	30	+
27	iron	+	+	+	+	+	+	+	–	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	36	Q677	33	+
28	aluminium	+	+	+	+	+	+	+	–	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	+	+	+	+	+	+	+	+	+	36	Q663	37	+
29	copper	+	+	+	+	+	+	+	–	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	+	+	+	+	+	+	+	+	+	36	Q753	36	+
30	selenium	+	+	+	+	+	+	+	–	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	+	+	+	+	+	+	+	+	–	35	Q876	32	+
31	nickel	+	+	–	+	+	+	+	–	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	+	+	+	+	+	+	+	+	–	34	Q744	30	+
32	titration	+	+	–	–	–	+	+	–	+	–	+	–	–	+	+	+	+	–	–	–	–	+	+	–	–	+	+	–	+	+	+	+	–	+	+	–	+	–	21	Q191010	4	+
33	Extrusion reaction	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	0	Q31287730	0
34	sodium bicarbonate	+	+	–	–	–	+	+	–	+	+	+	+	+	+	+	+	+	–	–	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	–	+	–	27	Q179731	17	+
35	hydrochloric acid	+	+	–	+	+	+	+	–	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	–	+	+	–	+	–	29	Q2409	17	+
36	acetic acid	+	+	–	+	–	+	+	–	+	–	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	–	+	–	28	Q47512	47	+
37	sodium hydroxide	+	–	–	–	–	+	+	–	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	+	+	+	+	+	+	+	+	–	+	–	28	Q102769	24	+
38	copper(II) oxide	+	+	–	–	–	–	+	–	+	–	+	–	–	–	+	+	–	–	–	–	–	+	–	–	–	+	+	–	+	+	+	–	–	+	+	–	+	–	16	Q421787	19	+
39	implosion	+	–	–	–	+	–	+	–	+	–	+	–	–	+	+	–	–	–	–	+	–	–	+	–	–	+	+	–	+	–	+	+	+	+	+	–	+	–	18	Q523919	5	+
40	sodium acetate	+	–	–	–	–	+	+	–	+	–	+	–	+	+	+	+	–	–	–	–	–	–	–	–	–	+	+	–	+	+	+	+	–	+	+	–	+	–	18	Q339940	15	+
41	mirror	+	+	–	+	+	+	+	–	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	–	+	+	+	–	+	+	+	+	+	+	+	–	+	+	33	Q35197	10	+
42	silvering of glass	+	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	+	–	+	–	–	–	–	–	+	–	5	Q1758310	3	+
43	Catalytic oxidation	+	–	–	–	–	–	–	–	+	–	+	–	–	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	4	Q5051391	1
44	ammonia	+	+	–	+	+	+	+	+	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	–	+	–	31	Q4087	45	+
45	lithium	+	+	+	+	+	+	+	–	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	+	+	+	+	+	+	+	+	–	35	Q568	33	+
46	sodium	+	+	–	+	+	+	+	–	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	–	–	+	+	+	+	+	+	+	+	+	+	+	+	–	33	Q658	27	+
47	potassium	+	+	+	+	+	+	+	–	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	–	+	+	+	+	+	+	+	+	+	+	+	+	+	–	34	Q703	27	+
48	luminescence	+	+	–	+	–	+	+	–	+	–	+	+	–	+	+	+	+	–	+	+	–	+	+	–	–	+	+	–	+	+	+	+	–	+	+	–	+	–	25	Q184240	6	+
49	coordination complex	+	+	–	–	–	+	+	–	+	+	–	+	+	+	–	–	+	–	–	+	–	+	–	–	–	+	+	–	+	+	+	+	–	+	+	–	+	–	21	Q238156	6	+
50	chemiluminescence	+	–	–	+	–	+	–	–	+	–	+	–	–	+	+	+	–	–	–	+	–	+	+	–	–	+	+	–	+	–	+	+	–	–	+	–	+	–	18	Q2931725	2	+
51	marble	+	+	–	+	+	+	+	–	+	–	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	–	+	–	29	Q40861	15	+
52	liquid nitrogen	+	–	–	–	–	–	–	–	+	–	+	+	–	–	+	–	+	–	–	–	–	+	–	–	–	+	+	–	+	+	–	+	+	–	–	–	+	–	14	Q1139370	6	+
53	light bulb	+	–	–	–	–	–	–	–	–	–	+	+	–	–	–	–	–	–	–	–	+	–	+	–	–	–	–	–	–	–	–	–	–	–	–	–	+	–	6	Q1318740	8	+
54	manganese heptoxide	+	–	–	–	–	–	–	–	+	–	+	–	–	–	–	–	–	–	–	–	–	+	+	–	–	+	+	–	+	+	+	+	–	+	–	–	+	–	13	Q27506	9	+
55	potassium chlorate	+	+	–	–	–	–	+	–	+	+	+	–	+	–	+	+	+	–	–	–	–	+	+	–	–	+	+	–	+	+	+	–	–	+	+	–	+	–	20	Q309328	12	+
56	exothermic reaction	+	–	–	–	–	+	+	–	+	–	+	+	+	+	–	+	+	–	–	+	–	–	+	–	–	+	+	–	+	–	+	+	–	–	+	–	+	–	19	Q205949	4	+
57	ethanol	+	+	+	+	+	+	+	–	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	+	+	–	32	Q153	47	+
58	Wood's metal	+	–	–	–	–	–	–	–	+	–	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	+	–	–	+	–	–	–	–	–	–	–	+	–	6	Q905989	5	+
59	Barnabas Wood (1819–1875)	+	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	2	Q17478983	9
60	Pharaoh's serpent	+	–	–	–	–	–	–	–	+	–	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	–	–	–	–	–	4	Q904180	3	+
61	mercuric thiocyanate	+	–	–	–	–	–	–	–	+	–	+	–	–	+	–	+	–	–	–	–	–	–	–	–	–	+	–	–	+	+	–	–	–	+	–	–	–	–	9	Q416035	8	+
62	evaporation	+	+	–	+	–	+	+	–	+	+	+	+	+	+	+	+	+	–	–	+	+	+	+	–	–	+	+	–	+	+	+	+	–	+	+	–	+	–	27	Q132814	10	+
63	aluminothermic reaction	+	–	–	–	–	–	–	–	+	–	+	–	–	+	+	+	+	–	–	+	–	–	–	–	–	+	+	–	+	–	+	–	–	–	–	–	+	–	13	Q447852	3	+
64	p-nitroaniline	+	–	–	–	–	–	–	–	–	–	–	–	+	–	–	+	–	–	–	–	–	–	–	–	–	–	+	–	–	+	–	–	–	+	+	–	+	–	8	Q419842	22	+
65	nitroaniline	–	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	–	–	2	Q104373663	3
66	superconductivity	+	+	–	+	–	+	+	–	+	–	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	+	+	–	29	Q124131	9	+
67	magnetic levitation	+	–	–	–	–	–	+	–	+	–	+	+	–	+	–	+	–	–	–	–	–	–	–	–	–	+	+	–	+	–	–	–	–	+	+	–	+	–	13	Q1061251	5	+
68	permanganate	+	–	–	–	–	+	–	–	+	–	+	+	–	–	–	+	–	–	–	–	–	–	+	–	–	+	+	–	–	+	–	–	–	+	+	–	+	–	13	Q56809357	3	+
69	glucose	+	+	–	+	+	+	+	–	+	–	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	+	+	–	30	Q37525	11	+
70	cupric sulfate	+	–	–	–	–	–	+	–	+	+	+	+	+	+	–	+	+	–	+	–	–	+	–	–	–	+	+	–	+	+	+	+	–	+	+	–	+	–	21	Q107184	18	+
71	chemical synthesis	+	+	–	–	+	+	+	–	+	–	+	+	–	+	–	–	+	–	–	–	–	–	+	–	–	+	+	–	+	+	–	+	–	+	+	+	+	–	20	Q273499	5	+
72	air	+	+	+	+	+	+	+	–	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	+	+	+	+	+	+	+	+	+	36	Q7391292	15	+
73	oxygen	+	+	+	+	+	+	+	–	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	–	36	Q629	28	+
74	dehydration	+	–	–	–	–	+	+	–	+	–	+	+	+	–	–	+	+	+	–	–	+	+	–	–	–	+	+	–	+	+	+	+	+	+	+	–	+	–	22	Q194290	12	+
75	hydrogen atom	+	–	–	–	–	–	+	–	–	–	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	+	–	+	–	–	+	–	–	–	–	+	–	7	Q6643508	6	+
76	zinc sulfide	+	–	–	–	–	–	+	–	+	–	+	–	–	–	+	+	+	–	–	–	–	–	+	–	–	+	–	–	+	+	–	+	–	+	+	–	–	–	14	Q204952	10	+
77	hyperbaric welding	+	–	–	–	–	–	–	–	–	–	+	–	–	–	+	–	–	–	–	–	–	–	+	–	–	+	+	–	+	–	–	–	–	–	–	–	+	–	8	Q2346649	2	+
78	volume contraction	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	1	Q7940889	2
79	pyrophoricity	+	–	–	–	–	–	–	–	+	–	+	–	–	+	+	+	–	–	–	–	–	–	–	–	–	+	+	–	+	–	–	–	–	+	–	–	+	–	11	Q912400	2
80	sodium amalgam	+	–	–	–	–	–	–	–	+	–	+	–	–	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	+	–	–	–	–	–	–	–	–	–	5	Q901475	6
81	ammonium cation	+	–	–	+	–	+	+	–	+	–	+	+	+	+	+	+	+	–	+	+	–	+	+	–	–	+	+	–	+	–	+	+	–	+	+	–	+	–	24	Q190901	12	+
82	amalgam	+	–	–	+	–	–	+	+	+	–	+	+	+	–	+	+	+	–	+	+	–	–	+	–	–	+	+	–	+	+	+	+	–	+	+	–	+	–	23	Q182574	5	+
83	hydrolysis	+	+	+	+	–	+	+	–	+	–	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	+	+	–	30	Q103135	7	+
84	aluminium phosphide	+	–	–	–	–	–	–	–	+	–	+	–	–	–	–	+	–	–	–	–	–	–	+	–	–	+	+	–	+	+	+	+	–	+	–	–	–	–	12	Q411853	11
85	chemical oscillator	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	2	Q55607203	4	+
86	electrochemical cell	+	–	–	–	–	–	–	–	–	–	+	+	+	+	–	–	+	–	–	–	–	–	+	–	–	–	+	–	–	–	–	–	–	–	–	–	+	–	9	Q80097	3	+
87	lemon battery	+	–	–	–	–	–	+	–	–	–	–	–	+	–	+	–	–	–	–	–	–	+	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	6	Q3621156	7	+
88	essential oil	+	+	–	+	–	+	+	–	+	–	+	+	+	+	+	+	+	–	–	+	+	+	+	–	–	+	+	–	+	+	+	+	–	+	+	–	+	–	26	Q170885	3	+
89	metabisulfite ion	+	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	+	–	–	–	+	+	–	–	–	6	Q408776	5
90	phosphine	+	–	–	–	–	+	–	–	+	–	+	+	+	–	+	+	+	–	–	–	–	+	+	–	–	+	+	–	+	+	+	+	–	+	+	–	+	–	20	Q207877	26	+
91	mercury beating heart	+	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	3	Q1282891	2	+
92	Traffic light experiment	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	1	Q116869807	3
93	indigotindisulfonate sodium	+	–	–	–	–	+	–	–	+	–	+	–	–	–	–	+	–	–	–	–	–	–	+	–	–	+	–	–	+	+	+	–	–	+	+	–	+	–	13	Q410120	11	+
94	barking dog reaction	+	–	–	–	–	–	+	–	–	–	+	–	–	–	–	–	–	–	–	–	–	–	+	–	–	+	–	–	–	–	–	–	–	–	–	–	–	–	5	Q815904	2	+
95	theatrical blood	+	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	3	Q446213	2	+
96	ferric chloride	+	–	–	–	–	–	–	–	+	–	+	+	+	–	+	+	+	–	–	–	–	+	+	–	–	+	+	–	+	+	+	+	–	+	+	–	+	–	19	Q399771	14	+
97	potassium thiocyanate	+	+	–	–	–	–	–	–	+	–	+	–	+	–	–	+	–	–	–	–	–	–	+	–	–	+	+	–	+	+	+	–	–	+	–	–	–	–	13	Q412113	11	+
98	sulfur hexafluoride	+	–	–	–	–	–	+	–	+	–	+	–	+	–	+	+	–	–	–	–	–	+	+	–	–	+	+	–	+	+	–	+	–	+	+	–	+	–	17	Q279055	21	+
Σ	→ Autolist→ gallery	95	40	16	35	26	47	57	3	77	31	89	55	56	54	56	65	56	12	35	45	37	52	66	4	12	76	67	14	81	64	62	60	35	70	65	21	76	7	1,819	avg: 19\48\49%	1,281

Biology videos at the Institute of Biology, Skopje

On September 29, 2021 started filming the first biology videos of experiments conducted to demonstrate various processes and reactions in scientific field. These 20 demonstrations and experiments were performed with collaboration of multiple laboratories within the Institute of Biology, by their docents and assistants, with guidance of their professors.

On June 23, 2022, starting from 9 AM to 1 PM, 21 biology experiments were shot at the Institute of Biology. The demonstrator of the experiments was Sofija Kostandinovska.

On October 13, 2022, from 10 a.m. to 2 p.m., with Sara Cvetanoska and Angela Ivanova, who are employed at the Institute of Biology of the Faculty of Natural Sciences and Mathematics, we recorded 21 videos of experiments related to the field of botany.

Biology gallery

These are the videos of the biology experiments uploaded to Wikimedia Commons. We would dearly appreciate if the descriptions can be translated in as many languages as possible and placed in their relevant articles on various Wikipedias. The thumbnail descriptions below each video here are short, and merely give an idea about their meaning. Each has a detailed description on its file page.

Note: Clicking on each description under the thumbnail will lead you to the file page with proper full description of the video.

• Determination of carbonates in soil
• Determination of cations in mountain peatlands water
• Preparation of a serial dilution test from soil sample
• Antibiogram (Kirby-Bauer method)
• MPN (Most probable number) method
• Cultural characteristics of Escherichia coli
• Gram stain technique
• Brown spores of an Agaricus silvicola
• Dextrinoid reaction
• Amiloid reaction
• Elaters with spiral thickened walls
• Spores with netted ornamentation
• Preparation of native microscope slide with help of an elderberry stem (Anatomical structure of a cross section of an iris leaf - Iris germanica)
• Preparation of native microscope slide (Hygroscopic movements of spores of horsetail- Equisetum sp.)
• Preparation of native microscope slide (Collateral conduction bundles of cross section of corn stem - Zea mays)
• Biuret reaction
• Separation of glucose in a serum
• Hematocrit
• Measuring with a spectrophotometer
• Separation of plasma and serum
• Physical factors of microbial growth using osmotic pressure
• Physical factors of microbial growth using ultraviolet radiation
• Chemical factors of microbial growth
• Control of microbial growth via antimicrobial chemotherapy using dilutions assay
• Cultivation of microorganisms: Inoculation and incubation
• Isolation of pure microbiological cultures: Streak method and inverted droplet method
• Streak method inoculation of yeasts and molds
• Preparing native slides of molds
• Preparing a fixed smear of yeast cells
• Schaeffer & Fulton spore staining method
• Milk quality
• Detection of bacteriophages
• Bacteria as indicators of quality and state of water from an ecological perspective
• Membrane filtration
• Filamentous fungi
• Nitrification and denitrification
• Soil water content
• Contact slides (Cholodny-Rossi buried technique)
• What happens when glucose and yeast are mixed together?
• Yoghurt making
• Cultivation of microorganisms: nutrient media
• Preparation of native microscope slide from Marchantia polymorpha thallus
• Isolation of gametangia (antheridium and archegonium) and respective paraphyses of the species Mnium punctatum
• Making a native microscope slide - a cross section of an Equisetum stem
• Production of a native microscope slide from the phylloid of Sphagnum sp.
• Russian olive (Elaeagnus angustifolia) leaf fiber under microscope
• Verbascum leaf fiber under microscope
• Nerium oleander leaf fiber under microscope
• Pollen seeds of Hibiscus syriacus under microscope
• Pollen seeds of Cucurbita pepo under microscope
• Pollen seeds of pine tree (Pinus) under microscope
• Complex starch seeds of Asian rice (Oryza sativa) under microscope
• Simple starch seeds of corn/maize (Zea mays) under microscope
• Simple starch seeds of wheat (Triticum vulgare) under microscope
• Simple starch seeds of common bean (Phaseolus vulgaris) under microscope
• Simple, semi-simple and complex starch of potato (Solanum tuberosum)
• Simple starch of crown of thorns (Euphorbia milii) under microscope
• Cytoplasm movement in stamen filament of Tradescantia virginiana under the microscope
• Surface observation of stomatal cells of leaves of bearded iris (Iris germanica) under microscope
• Bilateral conduction bundles in stem of Cucurbita pepo under microscope
• Radial conduction bundle in root of Caltha palustris under microscope
• Concentric type of the conductor bundle of eagle fern (Pteridium aquilinum) under microscope

Translation to other languages

Shared Knowledge would be very grateful to the wider Wikimedia community if the descriptions of these scientific videos can be translated from English to as many languages as possible and inserted into the relevant articles on those Wikipedias.

№	Article	en	az	ba	be	be -t	bs	bg	crh	cs	cv	de	el	eo	et	hr	hu	hy	hyw	ka	kk	lt	lv	mk	mt	myv	pl	ro	roa-rup	ru	sh	sk	sl	sq	sr	tr	tt	uk	vro	Σ	Wikidata	st.
1	carbonate	+	+	–	–	–	+	+	–	+	+	+	+	+	+	–	+	+	–	–	+	–	+	+	–	–	+	+	–	+	+	+	+	–	+	+	–	+	–	24	Q181699	7	+
2	ion	+	+	–	+	+	+	+	–	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	–	+	–	30	Q36496	8	+
3	serial dilution	+	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	–	–	3	Q476174	1	+
4	agar diffusion test	+	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	2	Q390585	1	+
5	most probable number	+	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	2	Q3866144	1
6	Escherichia coli	+	+	–	–	–	+	+	–	+	–	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	–	+	+	–	+	–	26	Q25419	15	+
7	Gram staining	+	–	–	–	–	–	–	–	+	–	+	+	+	–	+	+	–	–	+	–	+	–	–	–	–	+	+	–	+	–	+	+	–	–	+	–	+	–	16	Q188990	8	+
8	Agaricus silvicola	+	–	–	+	–	–	–	–	–	–	+	–	–	+	+	+	–	–	+	–	+	+	–	–	–	+	+	–	+	–	–	–	–	–	–	–	–	–	12	Q384480	17	+
9	Melzer's reagent	+	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	–	–	–	–	–	3	Q453548	2	+
10	amyloid	+	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	3	Q2736051	2
11	elater	+	–	–	–	–	–	–	–	–	–	+	–	+	–	–	–	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	–	–	–	+	–	5	Q1301565	1	+
12	summer truffle	+	+	–	+	–	–	–	–	–	–	+	–	+	+	–	+	+	–	+	–	+	–	–	–	–	+	+	–	+	–	–	–	–	–	–	–	+	–	14	Q74692	13	+
13	Iris x germanica	+	+	–	–	–	+	–	–	–	–	+	–	+	+	+	+	+	–	–	–	+	–	+	–	–	+	–	–	+	–	–	–	–	+	+	–	+	–	16	Q161734	17	+
14	Equisetum	+	+	–	+	+	+	+	–	+	+	+	+	+	+	+	+	+	–	–	+	+	+	+	–	–	+	+	–	+	–	–	+	–	+	+	+	+	–	27	Q28114	9	+
15	maize	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	+	+	+	+	+	+	+	+	+	+	+	35	Q11575	26	+
16	biuret test	+	–	–	–	–	–	–	–	+	–	+	–	–	+	–	+	+	–	–	+	–	–	–	–	–	+	+	–	+	–	–	+	–	–	–	–	+	–	12	Q804138	2	+
17	glucose	+	+	–	+	+	+	+	–	+	–	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	+	+	–	30	Q37525	11	+
18	blood serum	+	–	–	–	–	+	+	–	+	–	+	–	+	–	+	+	+	–	–	+	–	+	–	–	–	+	–	–	+	+	+	+	+	+	+	–	+	–	20	Q110084	4
19	hematocrit	+	–	–	–	–	–	–	–	+	–	+	+	–	+	+	+	+	–	–	–	+	–	+	–	–	+	+	–	+	+	+	+	–	+	+	–	+	–	19	Q111146	5	+
20	spectrometer	+	+	–	–	–	+	+	–	+	–	+	+	–	+	+	–	–	–	–	+	+	–	–	–	–	–	+	–	+	+	+	–	–	+	+	–	+	–	18	Q188463	4	+
21	blood plasma	+	+	–	+	–	+	+	–	+	–	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	–	+	–	28	Q79749	11	+
22	osmotic pressure	+	+	–	+	–	+	+	–	+	–	+	–	+	+	+	–	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	–	–	+	+	–	+	–	24	Q193135	6	+
23	antimicrobial agent	+	–	–	–	–	–	–	–	–	–	+	–	+	–	–	–	+	–	–	–	–	–	+	–	–	–	–	–	–	+	–	–	–	+	+	–	–	–	8	Q68541106	3	+
24	Antimicrobial chemotherapy	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	+	–	–	–	+	–	–	–	–	–	–	–	–	–	–	–	3	Q19903319	1
25	microorganism	+	+	–	+	+	+	+	–	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	+	+	+	+	+	+	32	Q39833	9	+
26	microbiological culture	+	–	–	–	–	–	+	–	+	–	+	–	+	+	–	–	–	–	–	–	–	–	+	–	–	+	+	–	+	–	–	–	–	–	+	–	+	–	12	Q1125312	6	+
27	mold	+	+	–	+	+	+	+	–	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	–	+	+	+	–	+	–	+	+	–	+	+	–	+	–	30	Q159341	5	+
28	yeast	+	+	+	+	–	+	+	–	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	–	+	+	+	–	+	+	+	+	+	+	+	–	+	–	31	Q45422	5	+
29	Schaeffer–Fulton stain	+	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	–	–	–	–	+	–	–	+	–	–	–	–	–	–	–	–	–	–	–	–	4	Q7430905	2
30	Enterobacteriaceae	+	+	–	+	–	–	–	–	+	–	+	+	+	–	+	+	–	–	–	–	–	–	+	–	–	+	+	–	+	–	–	–	–	–	+	–	+	–	15	Q380136	10	+
31	mesophile	+	–	–	–	–	–	+	–	+	–	+	+	+	+	–	+	–	–	–	+	–	–	+	–	–	+	–	–	+	–	–	–	–	+	–	–	+	–	14	Q669652	3	+
32	Staphylococcus aureus	+	+	–	–	–	+	+	–	+	–	+	+	+	+	+	+	+	–	–	–	+	–	+	–	–	+	+	–	+	+	+	+	–	+	+	–	+	–	23	Q188121	10	+
33	bacteriophage	+	+	–	+	–	+	+	–	+	–	+	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	–	+	+	–	+	–	27	Q165028	4	+
34	heterotroph	+	+	–	+	–	+	+	–	+	–	–	+	+	+	+	+	+	–	+	+	+	+	+	–	–	+	+	–	+	+	+	+	–	+	+	–	+	+	27	Q159344	6	+
35	Clostridium	+	–	–	+	–	–	–	–	+	–	+	+	–	+	+	+	+	–	+	–	–	–	+	–	–	+	+	–	+	+	–	+	–	+	+	–	+	–	19	Q327663	9	+
36	water quality	+	–	–	–	–	–	–	–	–	–	+	+	–	+	+	+	+	–	–	–	–	–	+	–	–	+	+	–	+	+	–	–	–	+	+	–	+	–	15	Q625376	5	+
37	soil microbiology	+	–	–	–	–	–	+	–	–	–	–	–	–	+	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	4	Q7554937	2	+
38	nitrification	+	+	–	–	–	–	–	–	+	–	+	–	–	+	–	+	–	–	+	+	+	–	+	–	–	+	–	–	+	–	–	+	–	+	–	–	+	–	15	Q668677	3
39	denitrification	+	+	–	–	–	–	–	–	+	–	+	–	–	+	–	+	+	–	–	–	–	–	+	–	–	+	+	–	+	–	–	+	–	+	+	–	+	–	15	Q742637	3
40	soil moisture	+	–	–	–	–	–	–	–	–	–	+	–	–	+	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	4	Q889507	2	+
41	microscope slide	+	–	–	–	–	–	–	–	–	–	+	–	+	–	–	–	–	–	–	–	–	–	+	–	–	+	–	–	+	–	–	–	–	–	–	–	+	–	7	Q900183	2	+
42	Marchantia polymorpha	+	+	–	+	–	–	–	–	+	–	+	–	–	–	–	+	+	–	–	–	+	+	+	–	–	+	+	–	+	–	–	+	–	–	–	–	+	–	15	Q992846	14	+
43	gametangium	+	–	–	+	–	+	–	–	+	–	+	–	–	–	–	–	–	–	–	+	–	+	+	–	–	+	–	–	+	–	–	–	–	+	–	–	+	–	12	Q1479790	3
44	Rhizomnium punctatum	+	–	–	–	–	–	–	–	+	–	+	–	–	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	–	–	–	–	–	–	+	–	5	Q150994	11	+
45	Sphagnum	+	–	–	+	–	–	+	–	+	–	+	–	+	+	+	+	+	–	+	+	+	+	+	–	–	+	–	–	+	–	+	+	–	–	+	–	+	–	21	Q30019	7	+
46	Elaeagnus angustifolia	+	+	–	–	–	–	–	–	+	–	+	–	–	+	+	+	+	–	+	+	+	–	+	–	–	+	+	–	+	–	–	–	–	+	+	–	+	–	18	Q157969	15	+
47	Verbascum	+	+	+	+	+	–	–	–	+	–	+	+	+	+	+	+	+	–	–	+	+	–	+	–	–	+	+	–	+	–	–	+	–	–	+	+	+	–	23	Q57051	11	+
48	Nerium oleander	+	+	–	+	–	–	+	–	+	–	+	+	+	–	+	+	+	–	+	+	–	+	+	–	–	+	+	–	+	+	–	+	–	+	+	+	+	–	24	Q155833	16	+
49	Nerium	–	+	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	+	–	–	–	+	–	–	–	–	–	–	–	+	–	–	–	4	Q3874774	7	+
50	Hibiscus syriacus	+	+	–	+	–	–	+	–	+	–	+	–	–	–	+	+	+	–	–	–	–	–	+	–	–	+	+	–	+	+	–	–	–	+	+	–	+	–	17	Q157756	15	+
51	Cucurbita pepo	+	+	+	+	–	+	+	–	+	+	+	–	+	+	+	+	–	–	+	+	+	+	+	–	–	+	+	–	+	+	+	–	+	+	+	–	+	–	27	Q7229863	19	+
52	Pinus	+	+	–	+	–	+	+	–	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	–	+	+	+	–	+	+	+	+	+	+	+	+	+	–	32	Q12024	15	+
53	Oryza sativa	+	+	–	–	–	–	+	–	+	–	–	–	–	–	–	–	–	–	–	+	+	+	+	–	–	+	+	–	+	–	+	–	–	+	+	–	+	–	15	Q161426	18	+
54	Triticum aestivum	+	+	–	–	–	–	+	–	+	+	+	+	–	+	+	+	–	–	+	+	+	–	+	–	–	+	–	–	+	–	–	+	+	–	+	–	+	–	20	Q161098	18	+
55	Phaseolus vulgaris	+	+	+	+	–	+	+	–	+	–	+	+	+	+	+	+	+	–	–	+	+	+	+	–	–	+	+	+	+	+	+	+	–	+	+	–	+	–	28	Q42339	24	+
56	potato	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	–	+	+	+	+	+	–	+	+	+	–	+	+	+	+	+	+	+	+	+	–	34	Q10998	25	+
57	Euphorbia milii	+	+	–	–	–	–	+	–	+	–	+	–	–	–	–	+	–	–	–	–	+	–	+	–	–	+	–	–	+	–	–	–	+	–	+	–	+	–	13	Q148829	16	+
58	Tradescantia	+	+	–	+	–	–	+	–	–	–	+	–	–	–	+	–	+	–	–	+	–	–	+	–	–	+	+	–	+	–	–	–	–	–	–	–	+	–	13	Q157498	9	+
59	Iris x germanica	+	+	–	–	–	+	–	–	–	–	+	–	+	+	+	+	+	–	–	–	+	–	+	–	–	+	–	–	+	–	–	–	–	+	+	–	+	–	16	Q161734	17	+
60	Caltha palustris	+	+	–	+	–	–	+	–	+	–	+	–	+	+	+	+	–	–	–	–	+	+	+	–	–	+	–	–	+	–	+	–	–	–	–	–	+	–	17	Q147192	18	+
61	Pteridium aquilinum	+	–	+	+	–	–	+	–	+	+	+	–	+	+	–	+	–	–	+	+	+	–	+	–	–	+	–	–	+	–	–	+	–	+	+	–	+	–	20	Q213548	17	+
Σ	→ Autolist→ gallery	60	36	7	28	8	23	32	2	42	12	56	26	34	39	35	41	34	2	24	31	34	26	49	0	4	50	38	2	49	24	24	29	12	35	40	8	49	3	1,048	avg: 17\28\45%	556

Food processing and bio technology videos at the Institute of Organic Technology, Skopje

On December 23, from 10 a.m. to 1 p.m., for the first time, we had filming experiments at the Faculty of Technology and Metallurgy, Skopje, more precisely at the Institute of Organic Technology. Their staff participated by performing 5 experiments in the field of food and bio technology. Regarding the number of attendees, 18 people from the FTM participated. One person was present on behalf of Shared Knowledge.

Biology gallery

These are the videos of the biology experiments uploaded to Wikimedia Commons. We would dearly appreciate if the descriptions can be translated in as many languages as possible and placed in their relevant articles on various Wikipedias. The thumbnail descriptions below each video here are short, and merely give an idea about their meaning. Each has a detailed description on its file page.

Note: Clicking on each description under the thumbnail will lead you to the file page with proper full description of the video.

• Synthesis of β-naphthol orange
• Synthesis of phenol-formaldehyde resin
• Testing of gelling properties of sodium alginate (production of alginate pearls)
• Anthocyanins from food as indicators of pH
• Enzymatic hydrolysis of starch

Translation to other languages

Shared Knowledge would be very grateful to the wider Wikimedia community if the descriptions of these scientific videos can be translated from English to as many languages as possible and inserted into the relevant articles on those Wikipedias.

№	Article	en	az	ba	be	be -t	bs	bg	crh	cs	cv	de	el	eo	et	hr	hu	hy	hyw	ka	kk	lt	lv	mk	mt	myv	pl	ro	roa-rup	ru	sh	sk	sl	sq	sr	tr	tt	uk	vro	Σ	Wikidata	st.
1	Acid orange 7	+	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	+	–	–	–	+	–	–	–	–	5	Q4674081	7	+
2	phenol formaldehyde resin	+	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	+	–	–	–	–	–	+	–	–	+	+	–	+	–	–	–	–	–	–	–	+	–	8	Q145897	5	+
3	alginic acid	+	–	–	–	–	–	–	–	–	–	+	+	–	+	–	+	–	–	–	+	–	–	+	–	–	+	+	–	+	+	–	–	–	+	–	–	+	–	13	Q422092	6
4	anthocyanins	+	–	–	+	–	+	+	–	+	–	+	–	+	+	+	+	+	–	–	+	–	+	+	–	–	+	+	–	+	–	+	+	–	+	+	–	+	–	22	Q262547	6	+
5	enzymatic hydrolysis	+	–	–	–	–	–	–	–	–	–	–	–	–	+	–	–	–	–	–	–	–	–	+	–	–	–	+	–	–	–	–	–	–	–	–	–	–	–	4	Q5381536	2
Σ	→ Autolist	5	0	0	1	0	1	1	0	1	0	4	1	1	3	1	2	2	0	0	2	0	1	5	0	0	3	4	0	3	2	1	1	0	3	1	0	3	0	52	avg: 10\1\27%	26