Navigation Links
How quickly can a bacterium grow?
Date:8/27/2013

CAMBRIDGE, Mass-- All living things must obey the laws of physics including the second law of thermodynamics, which states that the universe's disorder, or entropy, can only grow. Highly ordered cells and organisms appear to contradict this principle, but they actually do conform because they generate heat that increases the universe's overall entropy.

Still, questions remain: What is the theoretical threshold for how much heat a living cell must generate to fulfill its thermodynamic constraints? And how closely do cells approach that limit?

In a recent paper in the Journal of Chemical Physics, MIT physicist Jeremy England mathematically modeled the replication of E. coli bacteria and found that the process is nearly as efficient as possible: E. coli produce at most only about six times more heat than they need to meet the constraints of the second law of thermodynamics.

"Given what the bacterium is made of, and given how rapidly it grows, what would be the minimum amount of heat that it would have to exhaust into its surroundings? When you compare that with the amount of heat it's actually exhausting, they're roughly on the same scale," says England, an assistant professor of physics. "It's relatively close to the maximum efficiency."

England's approach to modeling biological systems involves statistical mechanics, which calculates the probabilities of different arrangements of atoms or molecules. He focused on the biological process of cell division, through which one cell becomes two. During the 20-minute replication process, a bacterium consumes a great deal of food, rearranges many of its molecules including DNA and proteins and then splits into two cells.

To calculate the minimum amount of heat a bacterium needs to generate during this process, England decided to investigate the thermodynamics of the reverse process that is, two cells becoming one. This is so unlikely that it will prob
'/>"/>

Contact: Andrew Carleen
acarleen@mit.edu
617-253-1682
Massachusetts Institute of Technology
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Oysters could rebound more quickly with limited fishing and improved habitat
2. Hand-held device cheaply, quickly diagnosis malaria
3. High doses of Vitamin D help tuberculosis patients recover more quickly
4. Bitter tastes quickly turn milk chocolate fans sour
5. Probiotic bacterium lessens severity of Salmonella infections by hoarding iron
6. Scientists discover ethnic differences in immune response to TB bacterium
7. Bacterium counteracts coffee ring effect
8. Scientists confirm that the Justinianic Plague was caused by the bacterium Yersinia pestis
9. Disappearing bacterium may protect against stroke
10. Scientists reveal how natural antibiotic kills tuberculosis bacterium
11. Bacterium signals plant to open up and let friends in
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/11/2015)... BOSTON , March 11, 2015   ... of its platform to scientifically measure and harness ... characteristics to real-time biometrics and objective measurements of ... of music at scale in large populations. It ... scientists, technologists and clinicians perform rigorous studies and ...
(Date:3/10/2015)... 2015 Transforming How We Look ... Medicine in Human Space Flight" by Michael ... , Ph.D. was recently featured by Springer Science Media, highlighting ... Specifically, "Personalized Medicine in Human Space Flight" ... in 2013 and 2014 from Springer in the journal ...
(Date:3/10/2015)... March 10, 2015  NXT-ID, Inc. (NASDAQ: ... "Company"), a biometric authentication company focused on the ... smart wallet has been named the "Number One ... Rethink Modern ( http://www.rethinkmodern.com/ ) is ... your home and lifestyle that have a unique function ...
Breaking Biology News(10 mins):Introducing The Sync Project, a Global Collaboration Harnessing the Scientific Potential of Music for Health 2Introducing The Sync Project, a Global Collaboration Harnessing the Scientific Potential of Music for Health 3"Personalized Medicine in Human Space Flight" Listed Among Most Influential Papers of 2013 and 2014 2NXT-ID's Wocket Smart Wallet Named Number One Best Tech Gift for 2015 by Rethink Modern 2NXT-ID's Wocket Smart Wallet Named Number One Best Tech Gift for 2015 by Rethink Modern 3NXT-ID's Wocket Smart Wallet Named Number One Best Tech Gift for 2015 by Rethink Modern 4
... at the University of Pennsylvania have demonstrated that morphine ... enhancing virus replication. The paper by Wang et al., ... appears in the November issue of The American Journal ... , Hepatitis C virus (HCV) is common among ...
... Nature by Dr. Michael Petrides and colleagues at the ... thinking that speech developed as a result of new ... and colleagues have identified a distinct brain region that ... to Broca's area - the region in the human ...
... Emerging relationships between the two viruses could one day ... of Florida researcher has discovered an unexpected link between ... vaccinated with an experimental strain of the human AIDS ... the feline version of the disease as those immunized ...
Cached Biology News:Hepatitis C complicated by morphine withdrawal 2New research puts a fresh spin on current thinking of speech evolution in humans 2UF scientist finds unexpected link between cat and human AIDS viruses 2
(Date:3/25/2015)... HAGUE, Netherlands , March 25, 2015  EndoStim ... for chronic gastro-esophageal reflux disease (GERD) in the March ... Surgery . 2015; 157(3):556-567 ], establishing the long term ... The study included 25 patients with severe GERD ... prescribed daily proton pump inhibitor (PPI) medication for an ...
(Date:3/25/2015)... 25, 2015 /CNW/ - The Gairdner Foundation is ... Canada Gairdner Awards, recognizing some of the most significant ... Among the world,s most esteemed medical research ... and provide a $100,000 (CDN) prize to each scientist for ... of research and innovation across the country, inspiring ...
(Date:3/25/2015)... NEW YORK , March 25, 2015 ... has released today version 4 of Face2Gene, ... Novel Analysis from computers, as well as mobile devices. ... patterns of human malformations to present comprehensive and up-to-date ... the Annual Clinical Genetics Meeting, ACMG 2015, in ...
(Date:3/25/2015)... , March 25, 2015  CASI Pharmaceuticals, Inc. ... the acquisition, development and commercialization of innovative therapeutics addressing ... market with a commercial focus on China ... 2 trial of its target therapy drug candidate ENMD-2076 ... of Chinese Academy of Medical Sciences in ...
Breaking Biology Technology:EndoStim LES Stimulation therapy demonstrates long term safety and efficacy results in treating reflux patients 2EndoStim LES Stimulation therapy demonstrates long term safety and efficacy results in treating reflux patients 32015 Canada Gairdner Awards Honour Top Medical Discoveries Around The World 22015 Canada Gairdner Awards Honour Top Medical Discoveries Around The World 32015 Canada Gairdner Awards Honour Top Medical Discoveries Around The World 42015 Canada Gairdner Awards Honour Top Medical Discoveries Around The World 52015 Canada Gairdner Awards Honour Top Medical Discoveries Around The World 62015 Canada Gairdner Awards Honour Top Medical Discoveries Around The World 72015 Canada Gairdner Awards Honour Top Medical Discoveries Around The World 8FDNA Releases a Multi-Platform Version of Face2Gene, a Genetic Search and Reference Solution at ACMG 2015 2CASI Pharmaceuticals Announces Initiation Of A Phase 2 Trial With ENMD-2076 In Triple-Negative Breast Cancer In China 2CASI Pharmaceuticals Announces Initiation Of A Phase 2 Trial With ENMD-2076 In Triple-Negative Breast Cancer In China 3CASI Pharmaceuticals Announces Initiation Of A Phase 2 Trial With ENMD-2076 In Triple-Negative Breast Cancer In China 4CASI Pharmaceuticals Announces Initiation Of A Phase 2 Trial With ENMD-2076 In Triple-Negative Breast Cancer In China 5
... wind turbines able to capture more energy from the ... Case Western Reserve University researcher has built a prototype ... and more durable than currently used blade materials. ... Macromolecular Science and Engineering, works with colleagues at Case ...
... Aug. 30, 2011 Farmers in North Carolina will ... a partnership by Perdue AgriBusiness and Winston-Salem-based Technology Crops ... the crop looks identical to canola, but the oil ... applications, especially industrial uses.  Grown in trials in North ...
... today introduced a revolutionary new system for protein analysis, Simon ... reinvention of the Western Blot, and is truly a historic ... years, researchers have access to a completely automated, walk-away solution ... invented in 1979 and to this day remains the most ...
Cached Biology Technology:Researchers build a tougher, lighter wind turbine blade 2Perdue AgriBusiness and TCI Collaborate to Bring Profitable New Crop to North Carolina 2Perdue AgriBusiness and TCI Collaborate to Bring Profitable New Crop to North Carolina 3Perdue AgriBusiness and TCI Collaborate to Bring Profitable New Crop to North Carolina 4ProteinSimple Reinvents the Western Blot 2
... Stem Cell Antibody Panels to its expanding ... Embryonic Stem Cell Marker Antibody Panel (Catalog ... phosphatase, Nanog, Oct-3/4, SSEA-1 and SSEA-4. The ... Plus (Catalog # SC009) contains antibodies against: ...
Epstein-Barr Virus (EBV) (EBNA-1)...
ECE-1 (H-60)...
Mouse HAI-1 Ectodomain MAb (Clone 199732)...
Biology Products: