Navigation Links
Illuminating the no-man's land of waters' surface
Date:11/27/2012

Water repelling molecules are said to be hydrophobic. The hydration or formation of water interfaces around hydrophobic molecules is important for many biological processes: protein folding, membrane formation, transport of proteins across an interface, the transmission of action potentials across membranes. It is involved as well in the process of creating mayonnaise, or in the fact that you can get rid of fat with soap. Hydrophobic interfaces although long studied, are poorly understood.

Here's an amusing kitchen-table experiment to illustrate waters unusual properties: put a drop of pure insulating oil in a glass of pure, non-conducting water, and create an electric field using two wires hooked up to a battery. You'll see the oil move from the negative to the positive pole of the little circuit you've created. You have created charge in a mixture that was neutral, and a huge amount of it too, judging from the speed at which the droplets move. The same thing happens for gas bubbles in water; the phenomenon of charging applies to all hydrophobic/water interfaces.

- A century of debates -

It's not a new discovery; scientists have observed the phenomenon in the middle of the 19th century. But despite more than a century of research, the reason why such a huge electric charge exists is still the subject of heated debate.

In an article published this week in Angewandte Chemie a journal of reference in the field EPFL scientist Sylvie Roke challenges a hypothesis put forward last spring in the same journal. With experimental proof to back her up, the holder of the Julia Jacobi chair in photomedicine makes her case: the phenomenon is not caused by the inevitable "impurities" present in oils, as her colleagues claim, but rather by certain intrinsic properties of the water molecules involved.

- Show the unseeable -

For proof, Roke turns to the technologies in which she is an expert nonlinear optics
'/>"/>

Contact: Sylvie Roke
sylvie.roke@epfl.ch
41-216-931-191
Ecole Polytechnique Fdrale de Lausanne
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Robotic fish research swims into new ethorobotics waters
2. Increase in metal concentrations in Rocky Mountain watershed tied to warming temperatures
3. WaterSMART funds $1.7 million for science projects in desert and southern Rockies LCCs
4. Potent human toxins prevalent in Canadas freshwaters
5. Coral reef thriving in sediment-laden waters
6. Ken Bierly of the Oregon Watershed Enhancement Board to receive ESA Regional Policy Award
7. Tropical plankton invade Arctic waters
8. Public sightings suggest increase in basking sharks in British waters
9. PSU study finds caffeinated coastal waters
10. 50 Years of Watershed Modeling -- Past, Present and Future
11. Scientists discover huge phytoplankton bloom in ice-covered waters
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Illuminating the no-man's land of waters' surface
(Date:6/16/2015)... , June 16, 2015 Fingerprint Cards ... communicated that it will amount to at least 340 MSEK ... to the rapid increase in market growth and orders received ... communicated guidance that revenue for 2015 will exceed 1,500 MSEK ... to approximately 2,200 MSEK. Due to receipt of ...
(Date:6/12/2015)...  Securus Technologies, a leading provider of civil ... investigation, corrections and monitoring, announced the United States ... analyze and identify participants of a video visitation ... This system can: , Identify that ... sign-on process is actually the person participating in ...
(Date:6/9/2015)... -- Research and Markets  ( http://www.researchandmarkets.com/research/xsgs2s/gesture ) has ... & Touchless Sensing Market by Technology (Touch-based & ... (Biometric & Sanitary Equipment) & by Geography - ... offering. The total gesture recognition and ... 23.55 Billion by 2020 at a high CAGR ...
Breaking Biology News(10 mins):Fingerprint Cards Raises the Revenue Guidance for Q2 2015 and for the Full Year 2015 2Fingerprint Cards Raises the Revenue Guidance for Q2 2015 and for the Full Year 2015 3Securus Announces Patent Issued for Authorized Presence Verification During Video Visitation 2Global Gesture Recognition & Touchless Sensing (Technology, Application & Products) Market 2015-2020 2
... Centre on Environmental Life Sciences Engineering established to be ... the 5th Research Centre of Excellence (RCE) supported by ... million for 5 RCEs since 2007 , , 1. The ... (MOE) announced today the funding support for a Research ...
... new University of California, Davis, study by a top ... predict when,sudden shifts in Earth,s natural systems will occur ... tipping points that,could push climate change into an irreparable ... warning signs that herald sudden,changes in natural systems, in ...
... Researchers have teased out the molecular process that ... that kills thousands each year who suffer battlefield casualties, ... to an article published in the January edition of ... about the enormously complex biomechanics of a reaction first ...
Cached Biology News:NTU sets up centre on micro-organism research for environmental engineering and sustainability 2NTU sets up centre on micro-organism research for environmental engineering and sustainability 3NTU sets up centre on micro-organism research for environmental engineering and sustainability 4New UC Davis study: Climate 'tipping points' may arrive without warning, says top forecaster 2Research could lead to way to halt deadly immune response 2Research could lead to way to halt deadly immune response 3
(Date:7/1/2015)... Costa Mesa, CA (PRWEB) , ... July 01, 2015 , ... ... and traumatic brain injury (TBI) using single photon emission computed tomography (SPECT) ... Columbia. The study, which examined over 20,000 brain scans and is believed to ...
(Date:7/1/2015)... PALO ALTO, Calif. , July 1, 2015 ... company focused on the development of groundbreaking drugs ... sclerosis (ALS), announced today that Robert G. ... Research Center at Sutter Health,s California Pacific Medical ... from The ALS Association for $1.5 million to ...
(Date:7/1/2015)... ... ... Apex Therapeutics announced today that company CEO, David Broecker provided a company ... presentation took place on Tuesday, June 16 and provided an update on the achievement ... treatment of pancreatic cancer. A copy of the company overview can be found ...
(Date:6/30/2015)... 30, 2015 /PRNewswire/ - Resverlogix Corp. ("Resverlogix") (TSX:RVX) ... of Resverlogix have approved the resolutions relating to: ... of 5,600,000 units at a price of $2.67 ... being comprised of one common share and 0.075358 ... approximately CAD$15 million; and (ii) the amendment to ...
Breaking Biology Technology:Brain Scans Can Tell Post-Traumatic Stress Disorder and Traumatic Brain Injury Apart According to New Research by Amen Clinics 2Brain Scans Can Tell Post-Traumatic Stress Disorder and Traumatic Brain Injury Apart According to New Research by Amen Clinics 3Brain Scans Can Tell Post-Traumatic Stress Disorder and Traumatic Brain Injury Apart According to New Research by Amen Clinics 4Investigator to Receive $1.5 Million Grant from the ALS Association to Help Fund Confirmatory Phase 2 Study of Neuraltus Pharmaceuticals' NP001 2Investigator to Receive $1.5 Million Grant from the ALS Association to Help Fund Confirmatory Phase 2 Study of Neuraltus Pharmaceuticals' NP001 3Investigator to Receive $1.5 Million Grant from the ALS Association to Help Fund Confirmatory Phase 2 Study of Neuraltus Pharmaceuticals' NP001 4Apex Therapeutics Presented Company Overview at This Year’s BIO International Convention in Philadelphia, PA 2Resverlogix Corp. Shareholders Approve Matters Relating to Licensing and Equity Arrangement 2Resverlogix Corp. Shareholders Approve Matters Relating to Licensing and Equity Arrangement 3
... 2011 Sequenom, Inc. (NASDAQ: SQNM ), a ... the Company,s participation at the 23rd Annual Piper Jaffray Healthcare ... 29-30, 2011. Ronald M. Lindsay, Ph.D., Director ... CFO, will present on Tuesday, November 29, 2011 beginning at ...
... hurdles to be cleared before human embryonic stem cells can ... cells can functionally integrate into target organs or tissues. ... the National Academy of Sciences, a team of Wisconsin ... slate human embryonic stem cells and implanted into the brains ...
... Carbon nanotubes, tiny cylinders composed of one-atom-thick carbon lattices, have ... science. Now a group of researchers from the University of ... unique properties, the low refractive index of low-density aligned nanotubes, ... nothing more than a flat, black sheet. The ...
Cached Biology Technology:Sequenom Announces Participation at the 23rd Annual Piper Jaffray Healthcare Conference 2Implanted neurons, grown in the lab, take charge of brain circuitry 2Implanted neurons, grown in the lab, take charge of brain circuitry 3
... for 0.2ml thermal cycler blocks, 96-well PCR plate, ... and heat seals), Cut-away corner , Fits all ... and 3700 capillary sequencers, Clear well bottom for ... Thermo-Mats, Adhesive Films and Foils, Heat Seals and ...
... One-Step Kit is the ultimate in ... It has been specifically designed to ... Reverse-iT™ One-Step Kit combines the unique ... Thermoprime Plus DNA Polymerase to provide ...
...
... G bind specifically to Fc regions of ... G conjugates are commonly used as affinity ... subtypes from serum, hybridoma ascites fluids, tissue ... reagents are also commonly used to capture ...
Biology Products: