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Andres Tretiakov

@andrestrujado.bsky.social
727 followers 195 following 140 posts

Chemist & science enthusiast in a journey of discovery, understanding & learning. I enjoy tinkering & making stuff (sometimes 🐝 keeping) 👨‍🔬

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Andres Tretiakov @andrestrujado.bsky.social · 30/09/2026
Just keep swimming 🐠 Pepper's ghost illusion just as good as more than 200 years ago! youtu.be/uov6Eyd6pIQ?...
youtu.be
Just keep swimming... Just keep swimming 🐠 #Peppersghost
YouTube video by andycapo123
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Reposted by Andres Tretiakov
Mark Miodownik @markmiodownik.bsky.social · 29/09/2026
We discussed this terrific book on Start the Week when it came out: www.bbc.co.uk/sounds/play/...
bbc.co.uk
Start the Week - Chemical Reactions - BBC Sounds
Tom Sutcliffe with chemist Ijeoma Uchegbu, science historian Kit Chapman & Mark Miodownik
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Andres Tretiakov @andrestrujado.bsky.social · 29/09/2026
Do you know your physics? youtube.com/shorts/PfdgX...
youtube.com
Spooky action at a distance 😜 #Faradayinductionlaw
YouTube video by andycapo123
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Andres Tretiakov @andrestrujado.bsky.social · 09/09/2026
Built a new thermoelectric effect demo youtube.com/shorts/SxjIG...
youtube.com
A nice simple demo I built to show the Thermoelectric effect. #Seebeckeffect
YouTube video by andycapo123
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Andres Tretiakov @andrestrujado.bsky.social · 27/08/2026
Chemist & educator extraordinaire, Andrew Szydlo, features as one of the 200 faces of UCL celebrating #UCL200 @uclchemistry.bsky.social www.ucl.ac.uk/about/search...
ucl.ac.uk
Bonding with millions: Andrew Szydlo, Chemistry teacher and enthusiast
UCL alumnus Andrew Szydlo is a chemist and educator, known for his engaging chemistry demonstrations and lectures, expertise in the history of alchemy and passion for making science accessible.
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Andres Tretiakov @andrestrujado.bsky.social · 21/08/2026
I love this new, improved & powerful Elihu Thompson 'Jumping Ring' demo. 240V AC across the coils cause eddy currents in the Al ring. By Lenz's law, the magnetic field generated by the eddy currents opposes the magnetic field of the coils. #TECHOGNITION youtube.com/shorts/SUasb...
youtube.com
New version of the Elihu Thompson 'Jumping Ring' demo. Using Al rings of different thicknesses.
YouTube video by andycapo123
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Reposted by Andres Tretiakov
Science in School @scienceinschool.bsky.social · 21/08/2026
Science meets art. Science helps art. And sometimes, science is art. 🎨🔬 This week’s spotlight from our archive features an article exploring the many fascinating connections between science and art, with resources to inspire interdisciplinary teaching. scienceinschool.org/article/2017...
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Andres Tretiakov @andrestrujado.bsky.social · 20/08/2026
The sticky problem of detecting fake honey www.chemistryworld.com/features/the...
chemistryworld.com
The sticky problem of detecting fake honey
Nobody knows how much of the honey we buy is pure or adulterated, as detecting fraud remains surprisingly difficult. Nina Notman examines why finding fake honey is so analytically challenging - and wh...
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Andres Tretiakov @andrestrujado.bsky.social · 20/08/2026
Can we hear light? An illuminating #physicsdemo that encodes radio signals in light waves. We can even tune the radio by placing the appropriate colour filter in front of LED. The principles of #lightmodulation FM & AM to carry info using light. #schooltechniciansRULE youtube.com/shorts/_8xZE...
youtube.com
An illuminating physicsdemo that encodes radio signals in light waves #lightmodulation
YouTube video by andycapo123
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Andres Tretiakov @andrestrujado.bsky.social · 20/08/2026
Another spectacular enlightening video from Master Chemist Andrew Szydlo! Black Gold youtu.be/cu0jUCI391g?...
youtu.be
Black Gold
YouTube video by Szydlo's Chemistry
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Andres Tretiakov @andrestrujado.bsky.social · 15/06/2026
The beauty of Chemistry 😍
Delicate & fragile sodium chloride fern like crystals grown on the surface of a plastic pipette.
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Andres Tretiakov @andrestrujado.bsky.social · 13/06/2026
AI still gets it wrong in this & many many other things: youtu.be/-LP605W1sUE?... Always, always proofread & seek alternative reliable sources!
youtu.be
AI vs でんじろう/ AI vs. Denjiro *Audio in EN / DE / FR / PT / ES
YouTube video by でんじろう先生のはぴエネ!【公式】Mr. Denjiro's Happy Energy!
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Andres Tretiakov @andrestrujado.bsky.social · 05/06/2026
After a tough week of internal exams, a well-deserved respite for next week! The opportunity to not only apply their knowledge but to get a bit creative😀 #Anamorphosis 🧪 youtube.com/shorts/Qawxo...
youtube.com
Anamorphosis
YouTube video by andycapo123
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Andres Tretiakov @andrestrujado.bsky.social · 22/05/2026
No money for Helmholtz coils? Not to worry. Make your own 3D printed version! 🧪 ⭕ #TECHOGNITION #techsrule @cleapss.bsky.social @iop.org
Set of 3D printed Helmholtz coils
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Andres Tretiakov @andrestrujado.bsky.social · 16/05/2026
The Chemistry department @uniofnottingham.bsky.social is in peril. Please sign the petition: nottinghamchemistry.github.io/Open_Letter/
nottinghamchemistry.github.io
Save Nottingham Chemistry
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Andres Tretiakov @andrestrujado.bsky.social · 15/05/2026
After some minor adjustments, we tried @cleapss.bsky.social's Experimentally determining the speed of light in air. It works really well & I highly recommend it👍
Equipment used for experimentally determining the speed of light in air. Close up of laser & beam splitter
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Andres Tretiakov @andrestrujado.bsky.social · 21/04/2026
Andrew Szydlo's The Magic of Mercury Part 1 is now available to watch thanks to the wonderful people of the @rigb.org 👏 Yes, we actually overrun by almost an hour so it's in 2 parts 😄 Not biased at all😅 A delight to watch. Enjoy! youtu.be/LlMnU73PPE8?... #Quicksilver
youtu.be
Quicksilver, alchemy & Faraday's motor – Part 1 with Andrew Szydlo
YouTube video by The Royal Institution
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Andres Tretiakov @andrestrujado.bsky.social · 21/04/2026
www.linkedin.com/safety/go/?u...
linkedin.com
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Andres Tretiakov @andrestrujado.bsky.social · 08/04/2026
Another fascinating video! #paramagneticGd youtu.be/YIxjFKBl5eg?...
youtu.be
Gadolinium (new) - Periodic Table of Videos
YouTube video by Periodic Videos
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Andres Tretiakov @andrestrujado.bsky.social · 08/04/2026
Chemists think they know what happened on board the Mary Celeste www.chemistryworld.com/news/chemist...
chemistryworld.com
Chemists think they know what happened on board the Mary Celeste
While many theories have surfaced as to what caused a loaded ship to be devoid of its crew, could this explanation close the case?
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Andres Tretiakov @andrestrujado.bsky.social · 26/03/2026
A really spectacular and educational periodic table! Please support it here: beta.ideas.lego.com/product-idea... I really want one 😊
beta.ideas.lego.com
Periodic Tower of Elements | LEGO® Ideas
"Unleash Your Creativity: Craft the Universe’s Building Blocks with the 3D Periodic Tower of Elements! Dive into a world where chemistry, physics, and architect…
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Reposted by Andres Tretiakov
Mark Miodownik @markmiodownik.bsky.social · 11/03/2026
Fed up working for THE Man? Calling architects and materials experts in Construction who want to explore new ways of building the future without trashing the planet. Diverse applicants welcome. Apply here: www.ucl.ac.uk/work-at-ucl/...
Female Samurai
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Reposted by Andres Tretiakov
Mark Miodownik @markmiodownik.bsky.social · 11/03/2026
We also have PhD scholarships available for UK citizens to work with us as the UCL Plastic Waste Hub. You get to hang out at Institute of Making too which is like enhancing. More info on our general vibe here: UCL Plastic Waste Innovation Hub - Institute of Making share.google/Y2C03GiZgkMO...
Materials library
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Reposted by Andres Tretiakov
#TECHOGNITION @techognition.bsky.social · 09/03/2026
#TECHOGNITION returns THIS FRIDAY 13th March 2026! Join us in celebrating and showcasing the essential work of school and FE college technical staff. Huge prizes to be won! www.techognition.org
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Andres Tretiakov @andrestrujado.bsky.social · 06/03/2026
Just a preview for next Friday 13th march #TECHOGNITION day! Students & staff will be making Rice Krispies dance 😂 #electrostatics @techognition.bsky.social
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#TECHOGNITION @techognition.bsky.social · 06/03/2026
We are just ONE WEEK AWAY from #TECHOGNITION 2026. Will you be joining us in celebrating and showcasing the amazing work of all school and FE college technical staff on Friday 13th March? Big prizes to be won! techognition.org/prizes-and-g...
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Andres Tretiakov @andrestrujado.bsky.social · 04/03/2026
Totally getting ready for #TECHOGNITION day 2026 next week. This is Otto Von Guericke's 1663 first electrostatic machine replica made by my friend Markus. Friday 13th March we'll celebrate with #electrostatics #shocks ⚡& much more... @techognition.bsky.social
Otto Von Guericke's first electrostatic machine using a sulphur sphere.
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Andres Tretiakov @andrestrujado.bsky.social · 03/03/2026
#TECHOGNITION2026 is fast approaching! Friday 13th March. A celebration of all technicians in schools and colleges in the UK. We make it happen! This year all about electrostatics ⚡
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Andres Tretiakov @andrestrujado.bsky.social · 04/02/2026
The Gassiot's cascade demo is mesmerising & terrifying at the same time!😬 #physicsdemos #techniciansRULE #dischargetubes #glowinguraniumglass youtube.com/shorts/OUWA0...
youtube.com
Ruhmkorff coil & high vacuum. Gassiot's cascade from an upside down uranium glass candle stick.
YouTube video by andycapo123
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Andres Tretiakov @andrestrujado.bsky.social · 23/01/2026
A brand-new lecture demo by Andrew Szydlo coming soon at The Royal Institution. Magical Mercury: the wonders of the liquid metal that has fascinated humans since ancient times. Sat. 21 March 2026 2.30 pm. www.rigb.org/whats-on/mag... Just to whet your appetites: www.researchgate.net/publication/...
rigb.org
Magical Mercury (family)
Andrew Szydlo explores the magic of mercury, looking at ground-breaking discoveries with a whole host of experiments to amaze
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Andres Tretiakov @andrestrujado.bsky.social · 20/01/2026
Sing it, say it out loud & shout from the highest structure in your schools!!! Technician Sarah Keay explains why school science technicians must not be taken for granted edu.rsc.org/opinion/lets...
edu.rsc.org
Let’s sing the praises of science technicians
Technician Sarah Keay explains why school science technicians must not be taken for granted
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Andres Tretiakov @andrestrujado.bsky.social · 16/01/2026
New electrical resistance demos! #Physicsmystery Thanks to @YeanyScience for the inspiration.
Sliding bulb on parallel wires and light bulb mystery
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Reposted by Andres Tretiakov
derek guy @dieworkwear.bsky.social · 14/01/2026
Bill Watterson is my favorite cartoonist. I adored the relationship btw Calvin and Hobbes as a child. But as I've gotten older, these strips feel even more tender and insightful. My respect for him grew when I learned of his stance against merchandising. Such principles are almost unheard of today.
Excerpt from Wikipedia reads: "Fight against merchandising his characters
For years, Watterson battled against pressure from publishers to merchandise his work, something that he felt would cheapen his comic through compromising the act of creation or reading.[21][22]

He refused to merchandise his creations on the grounds that displaying Calvin and Hobbes images on commercially sold mugs, stickers, and T-shirts would devalue the characters and their personalities. Watterson said that Universal kept putting pressure on him and that he had signed his contract without fully perusing it because, as a new artist, he was happy just to find a syndicate willing to give him a chance (two other syndicates had previously turned him down). He added that the contract was so one-sided that, if Universal really wanted to, they could license his characters against his will, and could even fire him and continue Calvin and Hobbes with a new artist. Watterson's position eventually won out, and he was able to renegotiate his contract so that he would receive all rights to his work. Later he said that the licensing fight exhausted him and contributed to the need for a nine-month sabbatical in 1991.[23]"
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Andres Tretiakov @andrestrujado.bsky.social · 13/01/2026
The wonders of Chemistry by @philipcball.bsky.social youtube.com/watch?v=a3Md... #spectacularchem
youtube.com
The Wonders of Chemistry with Philip Ball
YouTube video by Beauty of Science
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Reposted by Andres Tretiakov
Chris Baraniuk @chrisbaraniuk.com · 22/12/2025
NEW: Organ tuners have been leaving temperature and humidity records in little-known books for decades. 🎹 They reveal how temperatures inside churches have changed over time due to climate change and increased heating. A new scoop for The Reengineer! www.thereengineer.pro/p/church-org...
thereengineer.pro
Church organ tuning records mirror our warming climate
The records appear to reflect climate change, as well as the increased heating of churches in winter
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Reposted by Andres Tretiakov
Compound Interest | Chemistry infographics @compoundchem.com · 17/12/2025
Decorations and wrapping for day 17 of #ChemAdvent! Baubles were traditionally silvered using the reduction of silver nitrate with glucose - a chemical test used in classrooms to detect aldehydes. Wrapping paper and tape are both cellulose-based 🎁 #ChemSky 🧪
Infographic on how baubles are silvered using silver nitrate solution, concentrated ammonia and glucose solution. Glucose reduces the silver ions to silver metal. The chemical structures of silver nitrate and glucose are shown.Infographic on wrapping paper and tape. Both are based on cellulose, with tape also containing a pressure-sensitive acrylic or rubber-based adhesive. The structure of cellulose is shown.
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Andres Tretiakov @andrestrujado.bsky.social · 17/12/2025
Low pressure deuterium & hydrogen gases sealed in glass ampoules being excited by a high frequency high voltage supply. Seems to me that the deuterium is brighter than hydrogen. #Deuteriumplasma #TECHOGNITION #chemsky
Hydrogen left & deuterium right  gases being excited in sealed glass ampoules. Hydrogen left & deuterium right  gases being excited in sealed  glass ampoules.
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Reposted by Andres Tretiakov
Bob Worley @bobthechemist.bsky.social · 06/12/2025
Go to sites.google.com/view/13ismc2.... It's about micro- and small-scale practical activities inspired by the school educators in chemistry around the world. Look at the gallery page! Sign up on the front page. Send a proposal #chemsky #chemchat #realtimechem #beyondbenign #iTeachChem #Chemistry
sites.google.com
13ISMC26
Wednesday 8 July to Friday 10 July 2026
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Andres Tretiakov @andrestrujado.bsky.social · 13/12/2025
Electrifying physics Christmas tree 2025! ⚡ #inductioncoil #neonbulbs #sciencesky
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Andres Tretiakov @andrestrujado.bsky.social · 11/12/2025
Two years after talking about it, it finally became a reality. The new Archimides density practical for Year 8 was a resounding success. First they needed to determine if the drachma coins were made of gold & then if Hiero's crown was gold or an amalgam of Au & Ag. 👑 #Eureka #density #stories
3D printed drachma coins & crown painted gold with eureka can, measuring cylinder & beaker. 3D printed drachma coins painted with shiny metallic gold marker.
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Andres Tretiakov @andrestrujado.bsky.social · 09/12/2025
A bit of a different Christmas tree this year 😉 youtube.com/shorts/BXTsX... #TECHOGNITION #TechniciansmakeitHappen #sciencetechsRULE
youtube.com
The electrifying physics Christmas tree 2025 ⚡ #Highvoltage #physicsdemos #inductioncoil
YouTube video by andycapo123
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Andres Tretiakov @andrestrujado.bsky.social · 01/12/2025
Nominations for the Royal Society Hauksbee Award 2026 are now open. Please nominate your invaluable technicians! Royal Society Hauksbee Award | Royal Society royalsociety.org/medals-and-p...
royalsociety.org
Royal Society Hauksbee Award | Royal Society
This award is for outstanding achievements in science by someone whose work is mostly 'behind the scenes' or in support, including technicians, research office staff or other contributors who might no...
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Andres Tretiakov @andrestrujado.bsky.social · 10/10/2025
111 European Chemists Ebook launch by Chemistry hero Andrew Szydlo and others! Free to download here👇Enjoy! reference-global.com/book/9788367...
reference-global.com
111 European Chemists
Short biographies of 111 important European chemists, spanning the last three centuries. The biographies focus on their specialist fields of interest, their discoveries and how their work was intercon...
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Andres Tretiakov @andrestrujado.bsky.social · 02/10/2025
Strange behaviour of hydrogel spheres on a hot sheet of metal #Leidenfrosteffect #resonance
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Andres Tretiakov @andrestrujado.bsky.social · 01/10/2025
Dysprosium video: youtu.be/8TE3iRXVcmY?...
youtu.be
Dysprosium (new) - Periodic Table of Videos
YouTube video by Periodic Videos
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Andres Tretiakov @andrestrujado.bsky.social · 23/09/2025
Electrostatic levitation #physicsdemos 👻 #techognition #techsrule
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Andres Tretiakov @andrestrujado.bsky.social · 18/09/2025
Radio sound signal modulated via an LED & converted back into sound using a simple solar cell made of two 2p coins submerged in an electrolyte solution & connected to a speaker/amplifier. #physicschemdemos #techognition youtu.be/YdYFrpJHW7I?...
youtu.be
Transmitting sound via a blinking LED using two 2p coins solar cell
YouTube video by andycapo123
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Andres Tretiakov @andrestrujado.bsky.social · 10/09/2025
Glowing gases! #neonsigns #plasma #highvoltage #excitation #inertgases youtu.be/qAgaPBMNFr8?...
youtu.be
Glowing gases
YouTube video by andycapo123
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Andres Tretiakov @andrestrujado.bsky.social · 04/09/2025
Another magnificent video from the Master chemist Andrew Szydlo! #Acetylenechemistry youtu.be/FqtXDiRcohg?...
youtu.be
Acetylene Demonstration
YouTube video by Szydlo's Chemistry
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Andres Tretiakov @andrestrujado.bsky.social · 03/09/2025
Sunlight refracting & reflecting through rain drops ☔🌧️🌈 #Doublerainbow
Double rainbow
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