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Posts by Prof. Christoph Salzmann

I’m relying on the good old BBC 😀

3 weeks ago 0 0 0 0
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T-10 minutes…

3 weeks ago 0 1 0 0

Imagine we would fly back to the Moon and nobody would talk about it. That would be madness, no?

3 weeks ago 0 0 0 0
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Spring!!

1 month ago 1 0 0 0
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Group picture day..

1 month ago 0 0 0 0

Watching the Men’s moguls. Just love the fact that the English “mogul” comes from the Austrian “Mugel” meaning small hill. 😀

2 months ago 0 0 0 0
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BBC Audio | Unexpected Elements | Let the games begin How did one extra stitch cause a ski jumping scandal? -- Physics.

The Winter Olympics and ice. Listen to me on BBC’s Unexpected Elements discussing ice. ❄️ www.bbc.com/audio/play/w... @uclchemistry.bsky.social

2 months ago 2 1 0 0
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Tire-Wear Particles as Potential Ice-Nucleating Agents in the Atmosphere Tire-wear particles, generated through tire abrasion during driving, represent one of the largest global sources of microplastic pollution, with current annual emissions approaching 6 Tg. Due to their small particle sizes and low mass density, tire-wear particles can become airborne, undergo long-range transport, and potentially influence atmospheric processes. One critical but poorly understood pathway involves the heterogeneous freezing of supercooled cloud droplets, a key process in cloud glaciation and climate regulation. Here, we systematically investigate the ice-nucleating properties of laboratory-generated particles from summer, all-weather, and winter tires. Using optical microscopy as well as Fourier transform infrared (FT-IR) and Raman spectroscopy, we obtained particle-size distributions (∼100 μm mean diameter) and characterized the surface chemical compositions, confirming close similarity to the pristine tire materials. Ice-nucleation experiments performed with our custom-built IceBox instrument demonstrated that all tire particles consistently elevated the freezing temperatures of supercooled water droplets. The ice-nucleation performances of tire particles are found to be between feldspar and quartz, which are important mineral-based ice-nucleating agents in the atmosphere. Comparable results across all tire types suggest that major components such as rubber polymers or graphitic fillers are responsible for the observed activity. These findings establish tire-wear particles as effective atmospheric ice-nucleating agents, providing a baseline for future studies of environmentally aged tire particles and their potential roles in affecting the climate.

Great paper by @salzmannlab.bsky.social Lab showing that car tire microplastics are nucleation agents for ice crystals in the atmosphere. Their roles in regulating the climate likely to be important given that 1.3 million tons of tyre microparticles per year in Europe: share.google/qoOquT63awT8...

2 months ago 5 5 0 0
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Join The Big Plastic Count The UK’s biggest people-powered investigation into household plastic waste.

You can join the Big Plastic Count here: share.google/q1bdJ4OXqcuy...

2 months ago 2 2 0 1
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Tire-Wear Particles as Potential Ice-Nucleating Agents in the Atmosphere Tire-wear particles, generated through tire abrasion during driving, represent one of the largest global sources of microplastic pollution, with current annual emissions approaching 6 Tg. Due to their small particle sizes and low mass density, tire-wear particles can become airborne, undergo long-range transport, and potentially influence atmospheric processes. One critical but poorly understood pathway involves the heterogeneous freezing of supercooled cloud droplets, a key process in cloud glaciation and climate regulation. Here, we systematically investigate the ice-nucleating properties of laboratory-generated particles from summer, all-weather, and winter tires. Using optical microscopy as well as Fourier transform infrared (FT-IR) and Raman spectroscopy, we obtained particle-size distributions (∼100 μm mean diameter) and characterized the surface chemical compositions, confirming close similarity to the pristine tire materials. Ice-nucleation experiments performed with our custom-built IceBox instrument demonstrated that all tire particles consistently elevated the freezing temperatures of supercooled water droplets. The ice-nucleation performances of tire particles are found to be between feldspar and quartz, which are important mineral-based ice-nucleating agents in the atmosphere. Comparable results across all tire types suggest that major components such as rubber polymers or graphitic fillers are responsible for the observed activity. These findings establish tire-wear particles as effective atmospheric ice-nucleating agents, providing a baseline for future studies of environmentally aged tire particles and their potential roles in affecting the climate.

Could tire-wear particles 🛞 mess with clouds 🌧️? Check out our latest paper with @tfwhale.bsky.social! pubs.acs.org/doi/10.1021/...

3 months ago 4 0 0 0

Thanks - many important points and insights! Nobody should ever have to change parameters in submenus on small screens. In other words - all devices should have an integration for Home Assistant. 😀

3 months ago 0 0 1 0
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BBC Radio 4 - Curious Cases, Series 24, Frosty Fractals Hannah Fry and Dara Ó Briain investigate nature's most intricate patterns

Curious Cases on BBC4 about Frosty Fractals. We are trying to make sense about ice freezing on windscreens and many other icy things. ❄️

www.bbc.co.uk/programmes/m...

3 months ago 1 1 0 0
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Wiener Schnitzel in Vienna - does it get any better? 😀

3 months ago 1 0 0 0
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Every time I eat one of these rum cookies, there is a spike in the VOC data... 😀

3 months ago 2 0 0 0
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Just made my first ever Zigbee device. 101 for lab automation, a status light if things are going okay or not! 🚨

4 months ago 0 0 0 0
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The UCL Chemistry green wall is happening! @uclchemistry.bsky.social

4 months ago 3 0 0 0

What happened???

4 months ago 0 0 0 0
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What a great gift 😀

4 months ago 1 0 0 0

Maybe put them in a box with some desiccant?

4 months ago 1 0 1 0
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Isn’t it absolutely cool that TFL provide an integration for Home Assistant? Turn the kettle on once the 6:43 to Waterloo has departed?

5 months ago 1 0 1 0

Reading up more on Smart Meters. It was never a priority to make the data available to the user. We were always meant to look at the data on little displays with bad menu structures or download the data from the webpages of the energy companies. I want direct access to MY DATA.

5 months ago 0 0 0 0

It’s a proper scandal that you can’t read the data from your smart meter! Has there been no technology review? It would be so easy to make them Zigbee devices that broadcast the data locally. These devices are rolled out in millions and I can’t access my own data!!!

5 months ago 2 0 0 0

Turns out my pond is fine with the pump just running a third of the time. That’s a £100 saving over the year!

6 months ago 0 0 0 0

If set up Home Assistant over the weekend. It’s amazing - super flexible. There don’t seem to be many things it can’t do. The smart meter from Octopus is very easily integrated.

6 months ago 0 0 0 0
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The simple machine that visualised atomic orbitals In 1931, Harvey Elliott White developed a device that traced out the shapes of electron clouds by approximating solutions to the Schrödinger equation

In the early days of quantum chemistry, before we had computers to calculate the shapes of electron orbitals, one man invented a mechanical machine that simulated their shapes. My latest column for @chemistryworld.com
www.chemistryworld.com/opinion/the-...

7 months ago 145 58 6 6
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Tire-wear particles as potential ice nucleating agents in the atmosphere Tire-wear particles, generated through tire abrasion during driving, represent one of the largest global sources of microplastic pollution, with annual emissions approaching 6 million tons. Due to the...

Tire-wear particles as potential ice nucleating agents in the atmosphere | ChemRxiv - doi.org/10.26434/che...

7 months ago 2 0 0 0
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Tube strike - an opportunity to see some London sights on my commute..

7 months ago 2 0 0 0
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Decades ago, Almdudler ran a somewhat questionable ad campaign with Austrians heading straight back home after discovering that you can’t get Almdudler abroad. Still - the stuff is good! 😊

7 months ago 2 0 0 0

Almdudler is just the best!!

7 months ago 1 0 0 0
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Really great performance by Chappell Roan at Reading Festival.

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