105 citations · 477 across the 60 of their papers we have counts for
9 papers · 1 filter
Death rate during the exponential growth of E. coli
Loic Brot, Zengru Di, Romain Morichon +4
So fast is the growth of a culture of E. coli that it led researchers to overlook a possible death rate. As a matter of fact, the experiments done in the first half of the 20th cen…
Transient frailty induced by cell division. Observation, reasons and implications
Zengru Di, Eduardo M. Garcia-Roger, Peter Richmond +2
We know that stress-factors, e.g. X-rays, have an effect on cells that is more lethal in rapid exponential growth than in stationary phase. It is this effect which makes radiothera…
A joint explanation of infant and old age mortality
Peter Richmond, Bertrand M. Roehner
Infant deaths and old age deaths are very different. The former are mostly due to severe congenital malformations of one or a small number of specific organs. On the contrary, old…
Congenital anomalies from a physics perspective. The key role of "manufacturing" volatility
Alex Bois, Eduardo M. Garcia-Roger, Elim Hong +6
Genetic and environmental factors are traditionally seen as the sole causes of congenital anomalies. In this paper we introduce a third possible cause, namely random "manufacturing…
The physics of large-scale food crises
Peter Richmond, Bertrand M. Roehner, Qing-hai Wang
Investigating the ``physics'' of food crises consists in identifying features which are common to all large-scale food crises. One element which stands out is the fact that during…
Deciphering the fluctuations of high frequency birth rates
Claudiu Herteliu, Peter Richmond, Bertrand M. Roehner
Here the term "high frequency" refers to daily, weekly or monthly birth data. The fluctuations of daily birth numbers show a succession of spikes and dips which, at least at first…
How can one measure group cohesion? From individual organisms to their interaction
Z. Di, M. Gho, X. Lu +4
Measuring atomic and molecular interactions was one of the main objectives of physics during the past century. It was an essential step not only in itself but because most macrosco…
Extending physical chemistry to populations of living organisms. First step: measuring coupling strength
Zengru Di, Bertrand M. Roehner
For any system, whether physical or non-physical, knowledge of the form and strength of inter-individual interactions is a key-information. In an approach based on statistical phys…
Clustering experiments
Zhengwei Wang, Lei Wang, Ken Tan +2
It is well known that bees cluster together in cold weather, in the process of swarming (when the ``old'' queen leaves with part of the colony) or absconding (when the queen leaves…