Andres Tretiakov
@andrestrujado.bsky.social
Chemist & science enthusiast in a journey of discovery, understanding & learning. I enjoy tinkering & making stuff (sometimes 🐝 keeping)
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The Gassiot's cascade demo is mesmerising & terrifying at the same time!😬 #physicsdemos
#techniciansRULE
#dischargetubes
#glowinguraniumglass
youtube.com/shorts/OUWA0...
#techniciansRULE
#dischargetubes
#glowinguraniumglass
youtube.com/shorts/OUWA0...
Ruhmkorff coil & high vacuum. Gassiot's cascade from an upside down uranium glass candle stick.
YouTube video by andycapo123
youtube.com
February 4, 2026 at 10:02 PM
The Gassiot's cascade demo is mesmerising & terrifying at the same time!😬 #physicsdemos
#techniciansRULE
#dischargetubes
#glowinguraniumglass
youtube.com/shorts/OUWA0...
#techniciansRULE
#dischargetubes
#glowinguraniumglass
youtube.com/shorts/OUWA0...
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/...
Sat. 21 March 2026 2.30 pm.
www.rigb.org/whats-on/mag...
Just to whet your appetites: www.researchgate.net/publication/...
Magical Mercury (family)
Andrew Szydlo explores the magic of mercury, looking at ground-breaking discoveries with a whole host of experiments to amaze
www.rigb.org
January 23, 2026 at 4:15 PM
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/...
Sat. 21 March 2026 2.30 pm.
www.rigb.org/whats-on/mag...
Just to whet your appetites: www.researchgate.net/publication/...
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...
Technician Sarah Keay explains why school science technicians must not be taken for granted edu.rsc.org/opinion/lets...
Let’s sing the praises of science technicians
Technician Sarah Keay explains why school science technicians must not be taken for granted
edu.rsc.org
January 20, 2026 at 9:39 PM
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...
Technician Sarah Keay explains why school science technicians must not be taken for granted edu.rsc.org/opinion/lets...
New electrical resistance demos! #Physicsmystery
Thanks to @YeanyScience for the inspiration.
Thanks to @YeanyScience for the inspiration.
January 16, 2026 at 3:05 PM
New electrical resistance demos! #Physicsmystery
Thanks to @YeanyScience for the inspiration.
Thanks to @YeanyScience for the inspiration.
Reposted by Andres Tretiakov
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]"](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:ks3gpa6ftoyaq7hmf6c4qx4c/bafkreihmgl3sxrmb5t6edpjnixyanj2rvcf43zdv46mbifhl7hdtmz5u6y@jpeg)
January 14, 2026 at 6:18 AM
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.
The Wonders of Chemistry with Philip Ball
YouTube video by Beauty of Science
youtube.com
January 13, 2026 at 9:43 PM
Reposted by Andres Tretiakov
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...
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...
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
www.thereengineer.pro
December 22, 2025 at 12:13 PM
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...
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...
Reposted by Andres Tretiakov
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 🧪
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 🧪
December 17, 2025 at 11:15 AM
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 🧪
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 🧪
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
December 17, 2025 at 9:31 AM
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
Reposted by Andres Tretiakov
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
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
13ISMC26
Wednesday 8 July to Friday 10 July 2026
sites.google.com
December 6, 2025 at 2:10 PM
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
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
December 13, 2025 at 4:29 PM
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
December 11, 2025 at 4:48 PM
A bit of a different Christmas tree this year 😉
youtube.com/shorts/BXTsX...
#TECHOGNITION #TechniciansmakeitHappen #sciencetechsRULE
youtube.com/shorts/BXTsX...
#TECHOGNITION #TechniciansmakeitHappen #sciencetechsRULE
The electrifying physics Christmas tree 2025 ⚡ #Highvoltage #physicsdemos #inductioncoil
YouTube video by andycapo123
youtube.com
December 9, 2025 at 11:52 AM
A bit of a different Christmas tree this year 😉
youtube.com/shorts/BXTsX...
#TECHOGNITION #TechniciansmakeitHappen #sciencetechsRULE
youtube.com/shorts/BXTsX...
#TECHOGNITION #TechniciansmakeitHappen #sciencetechsRULE
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...
Royal Society Hauksbee Award | Royal Society royalsociety.org/medals-and-p...
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...
royalsociety.org
December 1, 2025 at 5:08 PM
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...
Royal Society Hauksbee Award | Royal Society royalsociety.org/medals-and-p...
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/book/9788367...
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...
reference-global.com
October 10, 2025 at 12:39 PM
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/book/9788367...
Strange behaviour of hydrogel spheres on a hot sheet of metal #Leidenfrosteffect #resonance
October 2, 2025 at 10:47 AM
Strange behaviour of hydrogel spheres on a hot sheet of metal #Leidenfrosteffect #resonance
Dysprosium video:
youtu.be/8TE3iRXVcmY?...
youtu.be/8TE3iRXVcmY?...
Dysprosium (new) - Periodic Table of Videos
YouTube video by Periodic Videos
youtu.be
October 1, 2025 at 12:24 PM
Dysprosium video:
youtu.be/8TE3iRXVcmY?...
youtu.be/8TE3iRXVcmY?...
September 23, 2025 at 8:34 AM
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/YdYFrpJHW7I?...
Transmitting sound via a blinking LED using two 2p coins solar cell
YouTube video by andycapo123
youtu.be
September 18, 2025 at 6:51 PM
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/YdYFrpJHW7I?...
Another magnificent video from the Master chemist Andrew Szydlo! #Acetylenechemistry
youtu.be/FqtXDiRcohg?...
youtu.be/FqtXDiRcohg?...
Acetylene Demonstration
YouTube video by Szydlo's Chemistry
youtu.be
September 4, 2025 at 12:51 PM
Another magnificent video from the Master chemist Andrew Szydlo! #Acetylenechemistry
youtu.be/FqtXDiRcohg?...
youtu.be/FqtXDiRcohg?...
Sunlight refracting & reflecting through rain drops ☔🌧️🌈 #Doublerainbow
September 3, 2025 at 6:10 PM
Sunlight refracting & reflecting through rain drops ☔🌧️🌈 #Doublerainbow
A few lenticular Schrödinger's cat cards from @optica.org to helps us for our #QuantumPhysics open day next Sat. 6th September! 🐱
August 29, 2025 at 12:45 PM
A few lenticular Schrödinger's cat cards from @optica.org to helps us for our #QuantumPhysics open day next Sat. 6th September! 🐱
Reposted by Andres Tretiakov
Aotearoa New Zealand launches campaign to find love for Ned, a rare & lonely left-spiralling snail.
Nearly all common garden snails have shells that coil to the right, but Ned’s shell results in reversed reproductive organs – a barrier to mating.
🧪🐌❤️
www.theguardian.com/world/2025/a...
Nearly all common garden snails have shells that coil to the right, but Ned’s shell results in reversed reproductive organs – a barrier to mating.
🧪🐌❤️
www.theguardian.com/world/2025/a...
New Zealand launches campaign to find love for rare and lonely left-spiralling snail Ned
Nearly all common garden snails have shells that coil to the right but Ned the snail’s left-spiralling shell results in reversed reproductive organs – a barrier to mating
www.theguardian.com
August 27, 2025 at 6:10 AM
Aotearoa New Zealand launches campaign to find love for Ned, a rare & lonely left-spiralling snail.
Nearly all common garden snails have shells that coil to the right, but Ned’s shell results in reversed reproductive organs – a barrier to mating.
🧪🐌❤️
www.theguardian.com/world/2025/a...
Nearly all common garden snails have shells that coil to the right, but Ned’s shell results in reversed reproductive organs – a barrier to mating.
🧪🐌❤️
www.theguardian.com/world/2025/a...
Reposted by Andres Tretiakov
This time last week we had a great time in @rsc.org Burlington House #London for my book launch. Thanks to everyone who joined us, especially @andrestrujado.bsky.social for this absolutely fantastic silver mirror coke bottle! Onscreen Chemistry is available now in bookstores #BookLaunch #ChemSky
August 21, 2025 at 2:54 PM
This time last week we had a great time in @rsc.org Burlington House #London for my book launch. Thanks to everyone who joined us, especially @andrestrujado.bsky.social for this absolutely fantastic silver mirror coke bottle! Onscreen Chemistry is available now in bookstores #BookLaunch #ChemSky