Sign in

Dr Geertje van Keulen

@drgvank.bsky.social
1.4K followers 1.2K following 567 posts

Swimming🏊‍♀️ sewciophilic🧵microbial 🧫biochemist🧪🧬/biomaterials ⚒️ scientist; (bio)chemistry, materials and ecobiology of actinos/natural products; microbiology/chemistry in hot tubs; Biofilm Alliance; Advisory Council member Microbiology Society; She/her

PostsRepliesMedia
Dr Geertje van Keulen @drgvank.bsky.social · 22/09/2026
Can anyone provide me pls with a pdf for Levin, P.A., Wang, J.D. Bacterial growth rate in populations and single cells. Nat Microbiol (2026). doi.org/10.1038/s415... #Icanhazpdf #thnx!!
doi.org
Bacterial growth rate in populations and single cells - Nature Microbiology
In this Perspective, Levin and Wang give a brief history of bacterial growth rate and discuss how it is connected to nutrient availability and macromolecule synthesis, with a focus on (p)ppGpp as a ce...
341
Dr Geertje van Keulen @drgvank.bsky.social · 04/08/2026
@paulhoskisson.bsky.social happy birthday, fellow birthday matey!🎂🍻
261
Reposted by Dr Geertje van Keulen
Dr Ellie Murray, ScD @epiellie.bsky.social · 28/07/2026
Tapping the sign…
Screenshot of an old tweet of mine from 4/18/25:

Some of y'all forget the reason we have food safety regulations is because companies used to do things like adding chalk to spoiled milk so it looked normal.

Regulations don't exist because governments enjoy them. They exist because pure unadulterated capitalism would kill us.
12691218
Dr Geertje van Keulen @drgvank.bsky.social · 28/07/2026
For those in the know :)
Pinda's van de Spar
010
Dr Geertje van Keulen @drgvank.bsky.social · 08/03/2026
Anyone on my TL interested in taking over tickets for the Metallica gig in the Principality stadium in Cardiff on Sun June 28th? A fried has tickets but can no longer go, looking to sell on.
011
Dr Geertje van Keulen @drgvank.bsky.social · 27/01/2026
🧫
010
Dr Geertje van Keulen @drgvank.bsky.social · 17/12/2025
🧫🦠🧪🧬💻
000
Dr Geertje van Keulen @drgvank.bsky.social · 16/12/2025
@joeeweaver.bsky.social heya, what is the best email address to reconnect with you? Have an old Newcastle address that bounced earlier
000
Dr Geertje van Keulen @drgvank.bsky.social · 30/11/2025
For those interested in metrics-based quality assessment of scienctific publication, good read here👇. And yes, I am fully aware of DORA and CoARA deevybee.blogspot.com/2025/11/the-...
deevybee.blogspot.com
The dangers of using bibliometrics with polluted data
This week I attended a Webinar organised by Clarivate on the topic of “ Eugene Garfield Centenary Celebration: Past, Present and Future ...
010
Dr Geertje van Keulen @drgvank.bsky.social · 02/11/2025
Yay for actinos and #natprod! See you in Belfast?! 🧫🧪🧬🦠
170
Dr Geertje van Keulen @drgvank.bsky.social · 17/10/2025
📣Had a great day at the #STAconference25 today, lots of interesting 🏊‍♀️pool plant engagement relevant for our 🧫Biofilm Alliance network! 😜And got to meet the keynote olympic🏊🏻‍♀️🥇🥇🥉🥉speaker too👇👇👇
090
Dr Geertje van Keulen @drgvank.bsky.social · 16/10/2025
Soooo, this is happening tomorrow! www.linkedin.com/posts/biofil...
linkedin.com
#biofilms #risks #health #management #prevention #standards #regulatoryguidance #staconference25 | Biofilm Alliance
📣Biofilm Alliance at STA (Swimming Teachers Association) Conference 2025 We are pleased to share that Biofilm Alliance 's Water💧🏊‍♀️ Lead Geertje van Keulen from Swansea University / Prifysgol Aberta...
010
Dr Geertje van Keulen @drgvank.bsky.social · 14/10/2025
Hey #streptomyces #natprod fans: 1. What is your favourite agar for growing really thick and dense aerial mycelial lawns? 2. How many spores would you inoculate on one 🧫 for thick and dense lawns? #microsky 🧪🧬🔬
221
Reposted by Dr Geertje van Keulen
Freya Harrison @friendlymicrobe.bsky.social · 24/09/2025
A colleague received proofs of an accepted manuscript, and the "proofing process" clearly involved running the text through ChatGPT. Their voice has been erased, and errors introduced. This is from a supposedly reputable publisher. Anyone else been put through this particular form of hell? #MicroSky
31611
Dr Geertje van Keulen @drgvank.bsky.social · 08/10/2025
Wow😲🤩 🧪🧫 🧬🔬⚗️ www.nature.com/articles/s41...
nature.com
Direct single-molecule detection and super-resolution imaging with a low-cost portable smartphone-based microscope - Nature Communications
Loretan and colleagues present a low-cost smartphone-based microscope capable of detecting single-molecule fluorescence. This approach opens doors to personalised and widely distributed applications in diagnostics, biosensing, and science education.
1226
Dr Geertje van Keulen @drgvank.bsky.social · 24/09/2025
Glorious start of the day in Amsterdam! Looking forward to meeting the scientists in EU COST Action 🧫🦠#Biofilm Regulatory Toolbox today and start discussions on how to progress #standards #methods aiming to ultimately develop #regulatory guidance
020
Reposted by Dr Geertje van Keulen
Applied Microbiology International @amiposts.bsky.social · 27/08/2025
Robert F Kennedy Jr. famously advocates drinking raw milk and promotes its benefits. But how safe is unpasteurised milk? Nicola Holden and Gil Domingue, who sit on AMI’s Food Security Scientific Advisory Group, take a deep dive into the science. www.the-microbiologist.com/opinion/safe...
the-microbiologist.com
Safety and nutritional claims for raw milk
Robert F Kennedy Jr. famously advocates drinking raw milk and promotes its benefits. But how safe is unpasteurised milk? Nicola Holden and Gil Domingue, who sit on Applied Microbiology International's Food Security Scientific Advisory Group, take a deep dive into the science.
121
Dr Geertje van Keulen @drgvank.bsky.social · 12/09/2025
Predatory conference check Q: Is the Global Food & Agri Summit 2026 in the Netherlands a predatory conference or is it legit? #science #conference #predatory?
001
Dr Geertje van Keulen @drgvank.bsky.social · 10/09/2025
Professional Request:if you work with/research or experience #biofilms in your work/company/client environments, can you please complete our Biofilm Alliance survey? The survey will close soon, so last chance to submit your experiences and influence the next steps! forms.office.com/e/7rYEETJT74 🧪🧫🦠
forms.office.com
Microsoft Forms
143
Reposted by Dr Geertje van Keulen
Matt Hutchings @handle.invalid · 12/08/2025
A new bench at JIC in memory of Helen Kieser. She moved to Norwich with David Hopwood in the 1960s and was instrumental in establishing the Streptomyces group and Molecular Microbiology @johninnescentre.bsky.social. Hard to overstate her importance to the #streptomyces field and community.
1327
Dr Geertje van Keulen @drgvank.bsky.social · 01/09/2025
@tadhgocroinin.bsky.social you must be chuffed! Started counting off the names yet?!🤣 bsky.app/profile/meto...
020
Dr Geertje van Keulen @drgvank.bsky.social · 24/08/2025
@matthutchings.bsky.social happy birthday, wishing you a lovely day!
media.tenor.com
a little boy is playing drums in front of an orchestra and says happy birthday to you !
ALT: a little boy is playing drums in front of an orchestra and says happy birthday to you !
020
Reposted by Dr Geertje van Keulen
Needhi Bhalla 💅🏽 @needhibhalla.bsky.social · 14/08/2025
“Writing an essay is hard because it forces you to use your brain in ways you haven't before…Your job is not to turn in completed assignments; it's to learn how to think. Turning in completed assignments can help you learn how to think, but only if you're the one who completed them.”
13810
Dr Geertje van Keulen @drgvank.bsky.social · 05/08/2025
In ‘other news’ today 🤪: ‘Danish zoo asks for unwanted pets to feed its predators’
100
Dr Geertje van Keulen @drgvank.bsky.social · 04/08/2025
@paulhoskisson.bsky.social happy birthday fellow emergencer! 🥳
450
Dr Geertje van Keulen @drgvank.bsky.social · 29/07/2025
Interesting read on Streptomyces #natprod rapamycin's potential role as treatment for long Covid and ME 🧫🦠🧪💊🛌
11910
Dr Geertje van Keulen @drgvank.bsky.social · 15/07/2025
Interesting read indeed
000
Reposted by Dr Geertje van Keulen
Prof Cynthia Whitchurch FAA🏳️‍🌈 @cwhitch.bsky.social · 02/12/2024
I'm recruiting! I'm looking for a motivated postdoctoral scientist to join my new team at SCELSE in Singapore. The role will explore various aspects of how #eDNA is produced and utilised in #Pseudomonas aeruginosa biofilms. #Microsky #phagesky #Science ntu.wd3.myworkdayjobs.com/Careers/job/...
ntu.wd3.myworkdayjobs.com
Research Fellow (eDNA in Biofilms)
The Singapore Centre for Environmental Life Sciences Engineering (SCELSE) is a unique interdisciplinary Research Centre of Excellence (RCE), funded by National Research Foundation, Ministry of Educati...
35050
Dr Geertje van Keulen @drgvank.bsky.social · 12/07/2025
Interesting read! #AI #PeerReview #prompt #science 💻⚙️ www.nature.com/articles/d41...
nature.com
Scientists hide messages in papers to game AI peer review
Some studies containing instructions in white text or small font — visible only to machines — will be withdrawn from preprint servers.
010
Dr Geertje van Keulen @drgvank.bsky.social · 10/07/2025
En route to London for the first ever meeting of the new style Advisory Council of @microbiologysociety.org 🧫🦠. It is gonna be scorching🥵🥵🥵☀️☀️☀️. On days like this you really get to appreciate the cool building I work in!
040
Dr Geertje van Keulen @drgvank.bsky.social · 19/06/2025
🧫🧪⚙️🧬⚗️💻
1112
Dr Geertje van Keulen @drgvank.bsky.social · 16/06/2025
Forgot to post yesterday! Fantastic sunset on first day of #ISBA2025. The sun sets very fast in Egmond aan Zee🌅
090
Dr Geertje van Keulen @drgvank.bsky.social · 15/06/2025
En route to #ISBA2025 from Leiden Central. Excited!! Lots of protesters at the railway station heading in the opposite direction to The Hague!
070
Dr Geertje van Keulen @drgvank.bsky.social · 06/06/2025
😜
000
Reposted by Dr Geertje van Keulen
c0nc0rdance @c0nc0rdance.bsky.social · 08/05/2025
Weird intersection of math & centrifuge balancing: Visual proof that it's possible to balance a 24-position centrifuge rotor for any number of equally-filled tubes EXCEPT 1 and 23. Some of these are anxiety-inducing, though. (🧑‍🎨: aliyoh, labrats subreddit)
It's a 24 panel illustration, with a rotor (circle) with 24 open circles.  For each increment from 1 to 24, an additional circle is filled with blue or pink, in ways that create a symmetrical axis of mass, allowing the rotor to be balanced when rotating at high speeds.  The pinks generally show the odd numbers (divisible by 3) while the blues are the paired (divisible by 2) I think?
1316036
Reposted by Dr Geertje van Keulen
Eva Heinz @evaheinz7.bsky.social · 05/06/2025
We are still looking for a motivated student to join us in the wonderful world of mosquito microbiome genomies! Funding unfortunately only for UK students for this one. If interested, please send CV & letter of motivation (email in image below) #MicroSky #MicrobiomeSky 💻🧬 🧪Please share widely😊 1/2
1516
Dr Geertje van Keulen @drgvank.bsky.social · 22/05/2025
Looking for recommendations for a portable UV VIS spectrophotometer that reads at min 260nm. Obviously nice price esp as is for an outreach activity. 🧪🧫
262
Dr Geertje van Keulen @drgvank.bsky.social · 17/05/2025
Whoopwhoop for 🇳🇱 #Claude’s C’est la vie #eurovision !
020
Dr Geertje van Keulen @drgvank.bsky.social · 20/04/2025
Happy Easter folks! 🥚🐇🐣🪺🌷
060
Dr Geertje van Keulen @drgvank.bsky.social · 02/04/2025
Moving back to #BeyondTheLab at #microbio25 with Dr Sara Holland from Potter Clarkson discussing the importance of IP and what protected inventions can look like
041
Dr Geertje van Keulen @drgvank.bsky.social · 02/04/2025
Proud ‘scientific parent’ moment! COATED EngD student Liam Haglington presenting his study results at #Microbio25 Environmental Applied Industrial Microbiology Forum #coatings 🧫🦠⚙️🔬
2121
Dr Geertje van Keulen @drgvank.bsky.social · 02/04/2025
Our #microbio25 session ‘Beyond the Lab’ has started in Hall 3b, come join us Prof Nic Holden, Dr Monica Gostic and me to hear what other opportunities there are for microbiologist🧫🦠🍄🧪🧬💊💻 First up Dr Izzy Webb with an update from DSIT
160
Dr Geertje van Keulen @drgvank.bsky.social · 31/03/2025
#Swansea out for dinner at #microbio25
1131
Dr Geertje van Keulen @drgvank.bsky.social · 31/03/2025
It’s started!!! #Microbio25 🧫🦠🧬🧪💊💻🍄
0151
Dr Geertje van Keulen @drgvank.bsky.social · 31/03/2025
It’s started!!! #Microbio25
010
Dr Geertje van Keulen @drgvank.bsky.social · 27/03/2025
How many folks on here are affected by #eduroam being down?
000
Dr Geertje van Keulen @drgvank.bsky.social · 25/03/2025
Obviously Helen was also an incredible #WomenInSTEM
000
Dr Geertje van Keulen @drgvank.bsky.social · 25/03/2025
Saddened to hear😢 of the passing of Dr Helen Kieser, renowned #Streptomyces researcher. I will always be grateful🙏🏼 for her support and advice in practically anything Streptomyces and so many other topics, work and private #secmet #natprod #naturalproducts #genetics 🧫🧪🧬
161
Reposted by Dr Geertje van Keulen
Matt Hutchings @handle.invalid · 13/03/2025
Today we updated streptomyces.org.uk/strepstrains... with lists of useful Streptomyces strains and plasmids we have @johninnescentre.bsky.social and details of how to request them.
streptomyces.org.uk
StrepStrains
02311
Dr Geertje van Keulen @drgvank.bsky.social · 17/03/2025
Share your research in #Ecology of #Actinomycetes #secmet #natprod 🧫🧪🦠🌎 at #ISBA2025 in our session! Submit your #abstract for an #oral or #poster #presentation by the end of the week to join Daniel Rozen and myself as Co-Chairs and speakers Linda Kinkel & Tamara Martin Pozas! #soil #ocean #water
0101