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The hidden force of growth: Dividing cell colonies drive phase separation in passing particles

Phys · · 949 words · By Manuel Maidorn
Active Matter Physics Phase Separation Biomedical Applications

Researchers from the Max Planck Institute and collaborating universities have discovered a new mechanism for phase separation where self-propelled particles form clusters due to the influence of a surrounding medium of dividing cells. The study suggests that the growing environment creates effective noise and attraction, potentially impacting the understanding of biofilms, tumors, and synthetic micro-swimmers.

open_in_new Read the original article: https://phys.org/news/2026-05-hidden-growth-cell-colonies-phase.html

analyticsAnalysis

10%
Propaganda Score
confidence: 100%
Low risk. This article shows minimal use of propaganda techniques.

psychologyDetected Techniques

warning
Loaded Language 70% confidence
Using words with strong emotional connotations to influence an audience.

fact_checkFact-Check Results

11 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

info Single Source 3
verified Verified 3
check_circle Corroborated 2
help Insufficient Evidence 2
schedule Pending 1
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“Researchers at the Max Planck Institute for Dynamics and Self-Organization (MPI-DS) in Göttingen, together with collaborators at the University of Edinburgh and the Institute of Physical Chemistry in Warsaw, have now discovered a new route to phase separation available in systems where the constituents are inherently alive or active.”
CORROBORATED
Multiple independent web search results confirm the collaboration between MPI-DS, University of Edinburgh, and the Institute of Physical Chemistry in Warsaw regarding phase separation in active systems.
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web search NEUTRAL — Researchers at the Max Planck Institute for Dynamics and Self-Organization (MPI-DS) in Göttingen, together with collaborators at the University of Edinburgh and the Institute of Physical ...
https://phys.org/news/2026-05-hidden-growth-cell-colonies-ph…
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web search NEUTRAL — 1Max Planck Institute for Dynamics and Self-Organization, G ̈ottingen, Germany 2Dioscuri Centre for Physics and Chemistry of Bacteria, Institute of Physical Chemistry, Warsaw, Poland 3Rudolf Peierls C…
https://arxiv.org/pdf/2506.05288v2
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web search NEUTRAL — However, a groundbreaking discovery by researchers at the Max Planck Institute for Dynamics and Self-Organization (MPI-DS) in Göttingen, in collaboration with scientists from the University of Edinbur…
https://www.lifetechnology.com/blogs/life-technology-science…
info
“In their recent study in Physical Review Research, they show that self-propelled particles—which could be crawling cells or miniature artificial agents—can spontaneously form clusters when they navigate a dense colony of dividing cells.”
SINGLE SOURCE
While the general topic of the study is corroborated in other results, the specific mention of 'Physical Review Research' and the exact phrasing about 'crawling cells or miniature artificial agents' is only found in the primary source text provided in the search snippets; other search results for this claim were irrelevant (Wikipedia 'Self', etc.).
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web search NEUTRAL — Open individualism is related to the concept of anattā in Buddhist philosophy where the term anattā (Pali: 𑀅𑀦𑀢𑁆𑀢𑀸) or anātman (Sanskrit: अनात्मन्) is the doctrine of "non-self" – that no unchanging, p…
https://en.wikipedia.org/wiki/Self
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web search NEUTRAL — Use this page to access your account at Self Financial, Inc., formerly known as Self Lender.
https://www.self.inc/home/dashboard
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web search NEUTRAL — Discover new workout ideas, healthy-eating recipes, makeup looks, skin-care advice, the best beauty products and tips, trends, and more from SELF.
https://www.self.com/
verified
“The driving force for this unexpected clustering is not an explicit interaction between the particles themselves, but emerges entirely from the ever-renewing environment created by the growing cells around them.”
VERIFIED
The claim is directly supported by the source 'The hidden force of growth', which explicitly states the driving force is the ever-renewing environment rather than explicit particle interaction.
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web search NEUTRAL — Clustering of self-propelled particles Many experimental realizations of self-propelled particles exhibit a strong tendency to aggregate and form clusters, [1][2][3][4][5] whose dynamics are much rich…
https://en.wikipedia.org/wiki/Clustering_of_self-propelled_p…
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web search NEUTRAL — The driving force for this unexpected clustering is not an explicit interaction between the particles themselves, but emerges entirely from the ever-renewing environment created by the growing ...
https://phys.org/news/2026-05-hidden-growth-cell-colonies-ph…
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web search NEUTRAL — The laws of physics, nonchalantly trespassing the border crossing between inanimate particle and living cell, are seen to perform cum laude in describing the bi-directional coupling between division a…
https://www.sciencedirect.com/science/article/pii/S037843712…
verified
“Using computer simulations, the researchers investigated a system that consists of a dense mixture of two kinds of particles. One type can grow, divide and die—like cells in a colony or tissue.”
VERIFIED
The source 'The hidden force of growth' explicitly describes the use of computer simulations with a mixture of two particle types, one of which can grow, divide, and die.
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web search NEUTRAL — Using computer simulations, the researchers investigated a system that consists of a dense mixture of two kinds of particles. One type can grow, divide and die—like cells in a colony or tissue.
https://www.msn.com/en-us/news/technology/the-hidden-force-o…
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web search NEUTRAL — A new NASA and Durham University simulation puts forth a different theory of the Moon’s origin – the Moon may have formed in a matter of hours, when material...
https://www.youtube.com/watch?v=kRlhlCWplqk
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web search NEUTRAL — Two types of computer simulation are often distinguished: equation-based simulations and agent-based simulations. Computer simulations of both types are used for three different general sorts of purpo…
https://plato.stanford.edu/entries/simulations-science/
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“They either dispersed evenly or collapsed into tight, crystal-like clusters, depending on how strongly the particles could propel themselves.”
CORROBORATED
Both 'The hidden force of growth' and 'Phase separation in a mixture of proliferating and motile active matter' confirm that motile particles in a proliferating background can either disperse or form dense clusters.
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web search NEUTRAL — Bacterial motility is the ability of bacteria to move independently using metabolic energy. Most motility mechanisms that evolved among bacteria also evolved in parallel among the archaea. Most rod-sh…
https://en.wikipedia.org/wiki/Bacterial_motility
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web search NEUTRAL — When the researchers placed self-propelled motile particles as a second type into this living matrix, something remarkable happened: They either dispersed evenly or collapsed into tight, crystal ...
https://phys.org/news/2026-05-hidden-growth-cell-colonies-ph…
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web search NEUTRAL — In a mixture of growing and motile particles, the proliferating background can act as a dynamic medium that drives motile particles into dense clusters. By constructing an effective model, researchers…
https://link.aps.org/doi/10.1103/9pns-h5ll
verified
“The boundary between these two behaviors is sharp—a so-called phase transition to phase separation.”
VERIFIED
The source 'The hidden force of growth' explicitly refers to this as a 'phase transition to phase separation'.
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web search NEUTRAL — The transition is initiated by a localized phase transition, where the expanding swarming monolayer generates multilayer clusters of cells as a consequence of motility- and stress-induced elevation of…
https://elifesciences.org/articles/62632
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web search NEUTRAL — A phase transition that runs backwards. This newly observed kind of phase separation has another counterintuitive feature. In the best-known form of phase separation in active systems, motility-induce…
https://www.msn.com/en-us/news/technology/the-hidden-force-o…
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web search NEUTRAL — Here, we study a dense binary mixture of motile and proliferating particles with exclusively repulsive interactions, where homeostasis in the proliferating subpopulation is maintained by pressure-indu…
https://arxiv.org/pdf/2506.05288
info
“the growing medium transforms a simple ballistic swimmer into something that behaves like an active Brownian particle—the physicists' model for a self-propelled particle with noise, friction, and finite persistence—without the particle itself having any of those properties built in.”
SINGLE SOURCE
The provided evidence for this claim consists of dictionary definitions of 'growing'. No scientific source in the provided evidence confirms the specific transformation of a ballistic swimmer into an active Brownian particle.
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web search NEUTRAL — The meaning of GROWING is increasing in size or amount. How to use growing in a sentence.
https://www.merriam-webster.com/dictionary/growing
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web search NEUTRAL — GROWING definition: becoming greater in quantity, size, extent, or intensity. See examples of growing used in a sentence.
https://www.dictionary.com/browse/growing
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web search NEUTRAL — He has two growing boys to take care of. In spring, feed growing plants with a high-quality fertiliser.
https://www.collinsdictionary.com/us/dictionary/english/grow…
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“When two non-growing particles are in close proximity, their combined presence perturbs the local flow of dividing and dying cells around them in a coordinated way. This shared disturbance creates a statistical bias causing the two particles to be pushed towards each other by the medium.”
SINGLE SOURCE
The search results provided for this claim are generic physics problems or unrelated papers on liquid flows; they do not specifically corroborate the mechanism of dividing/dying cells creating a statistical bias for these specific particles.
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web search NEUTRAL — If the first particle is pushed towards the centre of mass through a distance d, by what distance should the second particle be moved, so as to keep the centre of mass at the same position ? 13261. 29…
https://tardigrade.in/question/consider-a-two-particle-syste…
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web search NEUTRAL — In the experiments, liquid flows around a moving particle. That flow, in turn, pushes on the adjacent sheet, deforming the surface into a sinusoidal wave with a depression and a hump. The stream of li…
https://www.simonsfoundation.org/2018/09/17/surfing-particle…
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web search NEUTRAL — Hint:Use the formula for phase difference between the two particles in the wave motion.Two particles on a wave are said to be out of phase if they have a non-zero phase difference.
https://www.vedantu.com/question-answer/the-distance-between…
help
“In the best-known form of phase separation in active systems, motility-induced phase separation, it is the fast swimmers that cluster.”
INSUFFICIENT EVIDENCE
No evidence was found in the provided search results to evaluate this claim.
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“In our case, the opposite is true and it is the slow swimmers that condense.”
INSUFFICIENT EVIDENCE
No evidence was found in the provided search results to evaluate this claim.
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“Lukas Hupe et al, Phase separation in a mixture of proliferating and motile active matter, Physical Review Research (2026). DOI: 10.1103/9pns-h5ll”
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info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.