Navigation Links
Media highlights in the January issues of Biophysical Journal
Date:1/29/2008

Bethesda, MD The January 1st and January 15th issues of Biophysical Journal, published by the Biophysical Society, is now available online. Topics of interest include ciliates, force, spasmoneme, H2A/H2B, nucleosome, AFM, aquaporin, elasticity, and epithelial cells.

Volume 94, Issue 1, January 1, 2008

Power-limited contraction dynamics of Vorticella convallaria: an ultra-fast biological spring
Arpita Upadhyaya, Massachusetts Institute of Technology Mara Baraban, Massachusetts Institute of Technology Jacqueline Wong, Massachusetts Institute of Technology Paul T. Matsudaira, Whitehead Institute, MIT Alexander van Oudenaarden, Massachusetts Institute of Technology L.. Mahadevan, Harvard University
Keywords: ciliates; force; spasmoneme; velocity; viscosity

Speed is not characteristic of the microscopic movements common in biology where even fast cells typically move only about a body length every second. However, speed is what singles out the ultra-fast motion of a single-celled organism, Vorticella, as the stalk by which it is attached to a substrate contracts by coiling into a helix. The cell body is but a few microns in size, and yet can move at velocities of a few cm/s, i.e. it travels thousands of body lengths in a second. Our work quantifies the dynamics of this unusual spring-like engine and shows that this rapid movement is ultimately limited by the maximum power available when the stalk contracts, just as in a simple mechanical spring that is compressed and then suddenly released. However, unlike in a mechanical spring which stores and releases mechanical energy passively, in the contracting stalk of Vorticella, there is a dynamical conversion of one form of energy (electrostatic) into another (conformational) which process sets the ultimate internal physical limits on the performance of this mechano-chemical engine.


Sequence-Dependent Variations Associated with H2A/H2B Depletion of N
'/>"/>

Contact: Ellen R. Weiss
eweiss@biophysics.org
301-634-7176
Biophysical Society
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. February Geology and GSA Today media highlights
2. Media advisory -- 2008 Ocean Sciences Meeting
3. Oliguridylation-mediated histone mRNA decay
4. Immediate action needed to save corals from climate change
5. Media highlights in the Dec. 15 issue of Biophysical Journal
6. Better protection for biomedial devices could result from Rutgers-Camden research
7. December GEOLOGY and GSA TODAY media highlights
8. Nanotechnology and the media: The inside story
9. November GEOLOGY and GSA TODAY Media Highlights
10. Media highlights in the November issues of Biophysical Journal
11. October Geology and GSA Today media highlights
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/28/2014)... handful of bacterial culprits that may drive inflammatory bowel ... using patients, own intestinal immune responses as a guide. ... journal Cell . , Trillions of bacteria exist ... role in the development and progression of IBD. Yet ... species affect a person,s susceptibility to IBD and its ...
(Date:8/28/2014)... and his collaborators have developed an online analytic tool ... re-engineering cells for biomedical investigation. CellNet is a free-use ... stem cell engineering. Details of CellNet and its application ... papers in the journal Cell . , "This ... all types of cell-based investigations and can potentially offer ...
(Date:8/28/2014)... 28, 2014  Privacy Advocate and Senior Staff Attorney ... , joins the lineup of biometric and mobile commerce ... UnPlugged Executive Summit in Tampa, Florida ... announced speakers include Steven Rahman, Director, Technology and Strategy at ... Experian. The theme of this year,s event is Mobility ...
Breaking Biology News(10 mins):Yale study identifies possible bacterial drivers of IBD 2New tool aids stem cell engineering for medical research 2Biometrics UnPlugged Welcomes the Electronic Frontier Foundation's Jennifer Lynch to the Mobility at the Crossroads of Commerce and Privacy Summit 2
... clinic at the University of Michigan, neurologist Joseph Corey, M.D., ... to disease or injury. He sees the pain, ... conditions cause and wishes he could give patients more ... he heads to his research lab at the VA Ann ...
... Tom Bowman, chairman of Bowman Design Group and president ... Carbon Mitigation for Every Business" at the 2012 Behavior, ... original research and the success of own company,s green ... by 65% and decreased annual operating costs by $9000 ...
... HOUSTON (Nov. 7, 2012) Administering stem cells derived ... after a heart attack is safe but does not improve ... supported by the National Institutes of Health (NIH). ... Evaluation (TIME), mirror a previous related study, LateTIME, which found ...
Cached Biology News:Stem cells + nanofibers = Promising nerve research 2Stem cells + nanofibers = Promising nerve research 3Bone marrow stem cells do not improve short-term recovery after heart attack 2Bone marrow stem cells do not improve short-term recovery after heart attack 3
(Date:8/27/2014)... City, Utah (PRWEB) August 27, 2014 ... that will expand its current Salt Lake City manufacturing ... underway outside of Utah to ultimately create 1,000 new ... 20 years. , “Utah is home to hardworking ... whom can be credited with Varian’s success in the ...
(Date:8/27/2014)... Aug. 27, 2014 Rhythm, a biopharmaceutical company ... deficiencies that result in metabolic disorders, announced today that ... with the U.S. Securities and Exchange Commission (SEC) relating ... its common stock. The number of shares to be ... not yet been determined. Citigroup and Cowen ...
(Date:8/27/2014)... 2014 Reportlinker.com announces that a ... its catalogue: Global Biodegradable Packaging ... http://www.reportlinker.com/p02316661/Global-Biodegradable-Packaging-Materials-Market-2014-2018.html About Biodegradable Packaging ... readily decomposed by the action of microorganisms. ... in terms of raw materials, production technology, ...
(Date:8/27/2014)... mysteries is how plants survive impact by the ... rays, while using this energy for photosynthesis. The ... plant,s blades quickly dissipate the energy throughout the ... at DTU Physics have now managed to successfully ... bacteria contain light-absorbing proteins which play a role ...
Breaking Biology Technology:Varian Medical Systems Groundbreaking on Facility Expansion Triggers Influx of New Jobs to Salt Lake 2Varian Medical Systems Groundbreaking on Facility Expansion Triggers Influx of New Jobs to Salt Lake 3Rhythm Files Registration Statement for Proposed Initial Public Offering 2Global Biodegradable Packaging Materials Market 2014-2018 2Global Biodegradable Packaging Materials Market 2014-2018 3Global Biodegradable Packaging Materials Market 2014-2018 4Global Biodegradable Packaging Materials Market 2014-2018 5Global Biodegradable Packaging Materials Market 2014-2018 6Global Biodegradable Packaging Materials Market 2014-2018 7DTU researchers film protein quake for the first time 2
... Ala. , May 12 Atherotech Inc. will exhibit its ... Scientific Sessions 2010. The meeting takes place May 13-16 at ... , , ... lipid test that routinely reports directly measured LDL-C, which is included in ...
... ,, RESEARCH TRIANGLE PARK, N.C. , May 12 ... Research Clinical Trials and Statistics Unit, is running the Intergroup Exemestane Study ... women with early breast cancer and a median follow-up period of 91 ... the data from multiple centers. , ...
... Indiana Seed Fund, Indiana ,s only targeted life sciences seed ... Indianapolis -based biotechnology start-up company focused on the development of ... , , , ... 5 million Americans suffer from Alzheimer,s disease (AD), a number that ...
Cached Biology Technology:Atherotech Emphasizes Predictive Value of VAP(R) Cholesterol Test at National Lipid Association Meeting 2Atherotech Emphasizes Predictive Value of VAP(R) Cholesterol Test at National Lipid Association Meeting 3Max Neeman International Signs Agreement for Data Management/EDC of Large Phase IV Trials from Multiple Sites 2BioCrossroads Invests in Indianapolis Biotech Company Developing Treatments for Alzheimer's Disease 2BioCrossroads Invests in Indianapolis Biotech Company Developing Treatments for Alzheimer's Disease 3BioCrossroads Invests in Indianapolis Biotech Company Developing Treatments for Alzheimer's Disease 4
Human Carnosine Dipeptidase 1 Affinity Purified PAb...
... Polyoxyethylene Lauryl Ether ... 0.02% Kathon Preservative. Surfactant. ... in immunohistochemistry is 1 ... 35 solution added to ...
Mouse monoclonal [4i97] to HLA Class 1 A25 ( Abpromise for all tested applications). Antigen: Full length protein (Human): HLA Class 1 Antigen-A25. Swiss Protein ID: P18462...
MMP-1/8 (H-300)...
Biology Products: