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Tim C. Smith

@chemsmith.bsky.social
580 followers 929 following 580 posts

Chemist making/purifying stable-isotope compounds at MilliporeSigma. Dad, husband, slow endurance athlete. I like being with my wife and daughter, working out, traveling, hiking, broadway shows, rock n roll, tolerant joyful smart people.

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Tim C. Smith @chemsmith.bsky.social · 14/09/2026
A bit ago I couldn’t remember the word “thermometer.” Could only say “temperature probe.” Sheesh. 🧪 #chemsky #chemchat
A digital thermometer.
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Tim C. Smith @chemsmith.bsky.social · 10/09/2026
Anyone know how to wash/clean the charcoal out of this funnel? Happens in ground glass joints too. 🧪 #chemsky
Funnel with activated charcoal stains.
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Tim C. Smith @chemsmith.bsky.social · 04/09/2026
Bike ride is better and beer is tastier when you’ve played hooky from work to do it.
Me, having a beer at Little Fish Brewing Co in Dayton, OhioMe, stopping for a pic while biking on a bridge.
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Tim C. Smith @chemsmith.bsky.social · 27/07/2026
Looking for anyone who has done this as a large scale (>10 g) preparation of L-Glutamine. I can't get it to work well. (Yes I've scoured the literature and have considered the inhibitory feedback mechanisms and have varied all the variables I can, but continue to get poor yields.) #chemsky 🧪
Conversion of L-Glutamic acid to L-Glutamine using Glutamine synthetase.
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Tim C. Smith @chemsmith.bsky.social · 08/07/2026
When I was a kid and toothpaste tubes were metal (yes they were youngins!), we had little devices to scroll them up to get all the toothpaste out. Need that now. 🧪 #chemsky
Grease tube
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Tim C. Smith @chemsmith.bsky.social · 04/07/2026
Max Jr says Happy 4th of July.
My cat’s white paw with red and blue caps.
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Tim C. Smith @chemsmith.bsky.social · 20/06/2026
Woohoo my alma mater still holding strong. At least in the US. 🧪 #chemsky
News that UC Berkeley is top school in US and in top 3 in chemistry.
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Tim C. Smith @chemsmith.bsky.social · 19/06/2026
I did. It seems fine to me? (Big signal @ 32-35 min is my compound of interest.)
HPLC PDA signal showing signals for compounds.
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Tim C. Smith @chemsmith.bsky.social · 19/06/2026
Any prep-HPLC experts? I must isolate 20-40 g of a fatty acid ester by HPLC. RP column. So, many injections. I can make solutions that are 1 g material in 4 mL mobile phase. Is this a crazy (e.g., bad) concentration to use? It does *seem* to be working. 🧪 #chemsky
My HPLC sample vial.
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Tim C. Smith @chemsmith.bsky.social · 09/06/2026
I got one! Coworker made it and we dig it. Our new lab mascot. Believe I first saw this from bsky.app/profile/simo.... 🧪 #chemsky
Capybara NMR tube holder. With top hat and monocle. Same guy. Different lighting.
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Tim C. Smith @chemsmith.bsky.social · 07/06/2026
Using a balloon feels old school and fun. 🧪 #chemsky
Hydrogenation with balloon of H2.
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Tim C. Smith @chemsmith.bsky.social · 04/06/2026
In 2 days, a scientist wrote a whole paper and it was accepted. That was back in 2020. By now I assume you just feed in some data and AI converts it to a paper and minutes later it’s accepted by AI editors. 🧪
Copy of a paragraph from Dragon’s Egg by Robert L Forward (1980).
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Tim C. Smith @chemsmith.bsky.social · 03/06/2026
If there exists a 6-month to 1-year PhD level position in synthetic organic chemistry in the Seattle area, please let me know! (Yeah I know the odds are low.) Why this picture? I don’t know - but I can do chemistry! 🧪 #chemsky
Me in my biking clothes with a beer.
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Tim C. Smith @chemsmith.bsky.social · 01/06/2026
I kind of like getting a whiff, just a whiff, of ammonia. I don’t hate the smell in small doses. It makes me feel clean, or awake, or something. 🧪 #chemsky
Bottle of NH4OH.
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Tim C. Smith @chemsmith.bsky.social · 27/05/2026
In case you were wondering what’s in here. 🧪 #chemsky
Label on bottle of HCl with a notice that it contains…HCl.
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Tim C. Smith @chemsmith.bsky.social · 15/05/2026
Twice I have tried and failed to get into the lottery for this. Question: are there any other similar types of interesting natural phenomena like this to see? I think there are the bats exiting caves in Texas. Other stuff? Anything. 🧪
Advert for the Great Smokies synchronous firefly lottery.
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Tim C. Smith @chemsmith.bsky.social · 14/05/2026
Apparently Wheaton (or anyone?) does not make these desiccators any more - the ones with the gaskets. I like them much better than the ones you have to grease, and require force to pull the lids off. Do you know if these are sold anywhere? (Besides eBay) 🧪 #chemsky
Large and small desiccators with gaskets between base and lid.
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Tim C. Smith @chemsmith.bsky.social · 02/05/2026
This is in Virginia? We have these in Ohio too now.
A white trillium flower.
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Tim C. Smith @chemsmith.bsky.social · 29/04/2026
Harold Urey was born on this day in 1893. He discovered deuterium in 1932. Willie Nelson was born on this day in 1933 (same year as my mom). Urey got the Nobel Prize in 1934. Are these events connected? Here’s a New Ales Post Mow Lawn German Kolsch 4.2% to them. Willie is still with us! 🧪 #chemsky
Harold Urey, a deuterium atom, Willie Nelson, and me holding a beer.
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Tim C. Smith @chemsmith.bsky.social · 29/04/2026
Every time I see someone shame-post about how people should give up driving and bike to work, it’s a picture of someone on a completely flat road in the middle of the city. Not on hilly country roads for 30 km on icy roads in the dark with cars 2 cm from them. 🚲
Just me in my bike shirt, having a beer. 🍺 🙃
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Tim C. Smith @chemsmith.bsky.social · 19/04/2026
Dude had an attitude. 🐢
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Tim C. Smith @chemsmith.bsky.social · 15/04/2026
They should make these in funky colors and designs. 🧪 #chemsky
Dull rubber adapters.
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Tim C. Smith @chemsmith.bsky.social · 28/03/2026
Been firmly opposed to the anti-decency (and anti-science) party for a long time. 🧪 #chemsky
Me at a No Kings rally
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Tim C. Smith @chemsmith.bsky.social · 27/03/2026
WHY does my pump make a HORRIBLE ear-splitting racket for 5-45 min after turning it on. After that time it settles down. Doesn't seem to be related to amount or cleanliness of oil, or the belt. I think it's in the oil reservoir. 🧪 #chemsky
My Welch vacuum pump
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Tim C. Smith @chemsmith.bsky.social · 25/03/2026
If I only had a dollar for every time I realized it had not been rotovaping the last two hours because I did not hit the heating start button. 🧪 #chemsky
Rotovap indicating bath temp at 10 degrees when set at 45, because I had forgotten to start the heating.
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Tim C. Smith @chemsmith.bsky.social · 21/03/2026
My daughter made these. 🥰 🧪 #chemsky
Magnetic plastic bits portraying Einstein, Erlenmeyers (including one with our cat Max Jr), a round bottom flask, and me in a lab coat.
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Tim C. Smith @chemsmith.bsky.social · 20/03/2026
I cannot think the words “cold finger” without humming a James Bond movie tune. 🧪 #chemsky
A cold finger
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Tim C. Smith @chemsmith.bsky.social · 17/03/2026
Guess I wore the right shirt today! 🍀 🧪 #chemsky
Me wearing my green hoodie in the lab. It has a cartoon atom on it. I forgot what day it was so that was lucky.
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Tim C. Smith @chemsmith.bsky.social · 09/03/2026
Trying this again. Who are these two, and how are they connected? 🤓 🧪 #chemsky
Young woman. 80’s look. Middle aged man. Scientific writing on picture borders. Two pics of the woman. In one she’s wearing leather, looking seductive with a cigarette in her mouth. The same man, at a younger age. Pic looks early 20th century.
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Tim C. Smith @chemsmith.bsky.social · 08/03/2026
Who are these two, and what is their connection? 🧪 #chemsky
Two pictures of a young woman, in one she’s looking seductive, wearing leather and smoking. Also a black and white picture of a young man’s face. Another picture of the man and woman. The middle aged man has scientific writing near his picture. The young woman has a cute 70’s look.
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Tim C. Smith @chemsmith.bsky.social · 07/03/2026
Didn’t make it to a rally today, but yes I Stand Up for Science! 🧪 #chemsky
Me, wearing my MARCH FOR SCIENCE hat.
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Tim C. Smith @chemsmith.bsky.social · 07/03/2026
Forever and ever I thought that if the tube did not spin, the signals would be crap. But our spinner was down for weeks and everything was just fine. Signals looked just like they always looked. What do I not understand? (Spinner is back to working now, actually.) 🧪 #chemsky
NMR program showing spin at 0 Hz.
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Tim C. Smith @chemsmith.bsky.social · 05/03/2026
I was in grad skool 89 years ago but I have this memory that we used to buff our bench tops with mineral oil to make them shiny/pretty? Did I? Did anyone else? Do you do this or something similar now? 🧪 #chemsky
Newly cleaned hood bench surface.
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Tim C. Smith @chemsmith.bsky.social · 04/03/2026
Max Jr can probably tear a mouse or bird to pieces yet I feel the need to mash up his pâté up for him.
My cat Max Jr chowing down on dinner.
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Tim C. Smith @chemsmith.bsky.social · 02/03/2026
Kinda looks like I’m making 🎃 🥧 #chemsky 🧪
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Tim C. Smith @chemsmith.bsky.social · 26/02/2026
Small pet peeve, found on some glassware. I know the markings are only “5%” accurate anyway but why not just go all the way? What, are they saving some money doing this? #chemsky 🧪
400 mL beaker marked only to 325 mL. 2 L erlenmeyer marked only to 1800 mL.
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Tim C. Smith @chemsmith.bsky.social · 20/02/2026
I somehow have only recently discovered I can do SiO2 chromatography using an eluent of 45:45:10 CHCl3:MeOH:con NH4OH. No problem. Wouldn’t have previously guessed I could use that much aqueous and MeOH. Anyone else doing similar things? #chemsky 🧪
TLC plate showing fractions from a column.
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Tim C. Smith @chemsmith.bsky.social · 20/02/2026
I caught these a couple of weeks ago in Miamisburg Ohio.
Light pillars from street lights.
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Tim C. Smith @chemsmith.bsky.social · 09/02/2026
In Episode 77 of Topics in Endurance Sports I talk about three short trails races I did. In Ohio, Kentucky, and Indiana.
Scenes from the races.
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Tim C. Smith @chemsmith.bsky.social · 20/01/2026
Ain’t having much luck with this Northern Lights thing. The one time I didn’t go out (bc my useless app suggested not to) people nearby posted cool pics. The three times I did go out, I’ve mostly seen nothing but dull sky. 🧪
Boring night sky
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Tim C. Smith @chemsmith.bsky.social · 19/01/2026
The Nobel Peace Prize committee may have to give itself the Nobel Peace Prize for not giving Trump the Nobel Peace Prize.
The Nobel peace prize medal.
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Tim C. Smith @chemsmith.bsky.social · 17/01/2026
Do you appreciate someone from decades ago? It’s not always too late to thank them! 🧵 🧪 #chemsky #chemchat
First part of a post sent by former student stating that I had helped her.
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Tim C. Smith @chemsmith.bsky.social · 16/01/2026
Is it fairly common to do prep HPLC separations using only MS signals to decide when to collect product? For compounds with poor absorbance? E.g., amino acids. 🧪 #chemsky #chemchat Max Jr is curious too.
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Tim C. Smith @chemsmith.bsky.social · 10/01/2026
Some only flew into the nearby tree when I got close. 🧪
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Tim C. Smith @chemsmith.bsky.social · 10/01/2026
Smart/birder friends, why did all these little birds fly into my neighbor’s bush and get all chirpy TODAY? Near Cincinnati Ohio. 🧪
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Tim C. Smith @chemsmith.bsky.social · 09/01/2026
I love how in the movies (esp old movies) the aliens have some freaky evil technology that is nothing but a black box to us, yet in about 36 hours we (always an older white man) have a fix for it. 🧪 #chemsky #chemchat
Scene from “Invaders from Mars” movie (1953) showing white dude in lab coat mixing colorful chemicals.
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Tim C. Smith @chemsmith.bsky.social · 01/01/2026
Dream: some billionaire (trillionaire?) opens a gigantic laboratory where regular (non-superstar) scientists could work on their pet idea(s) for a year or two, to see if it’s feasible. Imagine the discoveries that would happen, the collaborations formed. 🧪 #chemsky #chemchat Also: Max Jr.
My tuxedo cat Max Jr
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Tim C. Smith @chemsmith.bsky.social · 29/12/2025
I know we see this crazy stuff a lot, but this was at the science section of a museum! Sheesh. I sent them a message, begging them to find a chemist to fix it. 🧪 #chemsky #chemchat
Horrible chemical structure seen at the entrance to the science part of a museum.
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Tim C. Smith @chemsmith.bsky.social · 23/12/2025
Wot. 🧪 #chemsky #chemchat
Shows as an ingredient “hydrogen gas infused purified water.”Acai blueberry pomegranate water, with hydrogen?
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Tim C. Smith @chemsmith.bsky.social · 22/12/2025
Found this little guy in our bathroom. I guess he is a “bold jumping spider.” some people keep them as pets.
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