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Dr Geertje van Keulen

@drgvank.bsky.social
1.4K followers 1.2K following 568 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

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Dr Geertje van Keulen @drgvank.bsky.social · 06/10/2026
📢 start of Centre for #BioMaths Colloquium Series 26/27 1st speaker Lukas Eigentler WarwickUni: ‘Variation in resource quality causes maintenance of individual variation in a competitive trait’ 🧮🧬👨🏻‍💻 🕐 Wed 7 Oct 1 pm BST Robert Recorde Room Bay Campus SwanseaUni 💻 Zoom tinyurl.com/BioMathsSwan...
tinyurl.com
Welcome! You are invited to join a meeting: BioMaths Colloquium . After registering, you will receive a confirmation email about joining the meeting.
Welcome! You are invited to join a meeting: BioMaths Colloquium . After registering, you will receive a confirmation email about joining the meeting.
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Dr Geertje van Keulen @drgvank.bsky.social · 22/09/2026
#microsky 🧫
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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...
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Dr Geertje van Keulen @drgvank.bsky.social · 06/08/2026
Thank you!
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Dr Geertje van Keulen @drgvank.bsky.social · 04/08/2026
@paulhoskisson.bsky.social happy birthday, fellow birthday matey!🎂🍻
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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.
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Dr Geertje van Keulen @drgvank.bsky.social · 28/07/2026
For those in the know :)
Pinda's van de Spar
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Dr Geertje van Keulen @drgvank.bsky.social · 06/04/2026
Tnx Mel!
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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.
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Dr Geertje van Keulen @drgvank.bsky.social · 27/01/2026
🧫
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Dr Geertje van Keulen @drgvank.bsky.social · 27/01/2026
:(
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Dr Geertje van Keulen @drgvank.bsky.social · 17/12/2025
🧫🦠🧪🧬💻
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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
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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 ...
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Dr Geertje van Keulen @drgvank.bsky.social · 02/11/2025
Yay for actinos and #natprod! See you in Belfast?! 🧫🧪🧬🦠
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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👇👇👇
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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...
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Dr Geertje van Keulen @drgvank.bsky.social · 14/10/2025
Ta! 5 ul spores at which density?
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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 🧪🧬🔬
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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
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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.
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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
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Dr Geertje van Keulen @drgvank.bsky.social · 21/09/2025
Not open access alas...
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Dr Geertje van Keulen @drgvank.bsky.social · 17/09/2025
The Dutch word for constant is also starting with a k!
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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.
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Dr Geertje van Keulen @drgvank.bsky.social · 13/09/2025
Lots of integrative plasmids are linear. Streptomyces Ecoli shuttle plasmids (circular, often low cooy) allow cloning in Ecoli before moving into Streptomyces
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Dr Geertje van Keulen @drgvank.bsky.social · 12/09/2025
Some Streptomyces plasmids can be huge eg pSCL4 is 1.8Mb! doi.org/10.1093/gbe/...
doi.org
The Sequence of a 1.8-Mb Bacterial Linear Plasmid Reveals a Rich Evolutionary Reservoir of Secondary Metabolic Pathways
Abstract. Plasmids are mobile genetic elements that play a key role in the evolution of bacteria by mediating genome plasticity and lateral transfer of use
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Dr Geertje van Keulen @drgvank.bsky.social · 12/09/2025
Streptomyces is not suitable for chemical or electro-transformation methods
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Dr Geertje van Keulen @drgvank.bsky.social · 12/09/2025
Yeah, integrating plasmids can be quite big indeed. If they contain a Tra element than they can be conjugated. This sometimes needs Ecoli strain changeover if host has a methylated DNA restriction system. Plasmids without conjugative element can be moved into Streptomyces via protoplasting
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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?
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Dr Geertje van Keulen @drgvank.bsky.social · 11/09/2025
Could be integrating plasmids? Streptomyces uses this a lot
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Dr Geertje van Keulen @drgvank.bsky.social · 10/09/2025
Follow us on LinkedIn www.linkedin.com/company/biofilm-alliance/
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Dr Geertje van Keulen @drgvank.bsky.social · 10/09/2025
More info on the Biofilm Alliance here: www.biofilm-alliance.org
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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
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Matt Hutchings @matthutchings.bsky.social · 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.
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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...
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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 !
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Dr Geertje van Keulen @drgvank.bsky.social · 15/08/2025
Is that a Pioreactor?
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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.”
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Dr Geertje van Keulen @drgvank.bsky.social · 05/08/2025
In ‘other news’ today 🤪: ‘Danish zoo asks for unwanted pets to feed its predators’
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Dr Geertje van Keulen @drgvank.bsky.social · 04/08/2025
Tnx!
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Dr Geertje van Keulen @drgvank.bsky.social · 04/08/2025
Tnx!
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Dr Geertje van Keulen @drgvank.bsky.social · 04/08/2025
Tnx!
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Dr Geertje van Keulen @drgvank.bsky.social · 04/08/2025
Tnx Maggie!
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Dr Geertje van Keulen @drgvank.bsky.social · 04/08/2025
@paulhoskisson.bsky.social happy birthday fellow emergencer! 🥳
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Dr Geertje van Keulen @drgvank.bsky.social · 04/08/2025
Rapamycin was first discovered as a weak antifungal of not much use and almost discarded! Look after all natural product libraries!
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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 🧫🦠🧪💊🛌
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Dr Geertje van Keulen @drgvank.bsky.social · 15/07/2025
Interesting read indeed
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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...
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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.
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