Navigation Links
Answer to saliva mystery has practical impact
Date:6/11/2010

Researchers at Rice University, Purdue University and the Massachusetts Institute of Technology have solved a long-standing mystery about why some fluids containing polymers -- including saliva -- form beads when they are stretched and others do not.

The findings are published online this week in the journal Nature Physics.

Study co-author Matteo Pasquali, professor in chemical and biomolecular engineering at Rice, said the study answers fundamental scientific questions and could ultimately lead to improvements as diverse as ink-jet printing, nanomaterial fiber spinning and drug dispensers for "personalized medicine."

Co-author Osman Basaran, Purdue's Burton and Kathryn Gedge Professor of Chemical Engineering, said, "Any kindergartner is familiar with this beading phenomenon, which you can demonstrate by stretching a glob of saliva between your thumb and forefinger. The question is, 'Why does this beading take place only in some fluids containing polymers but not others?'"

Pasquali said, "In answering the question about why some fluids do this and others do not, we are addressing everyday processes that apply to fiber and droplet formation, not just in multibillion-dollar industrial plants but also in fluids produced in living cells."

Saliva and other complex "viscoelastic" fluids like shaving cream and shampoo contain long molecules called polymers. When a strand of viscoelastic fluid is stretched, these polymers can cause a line of beads to form just before the strand breaks.

Pasquali said the explanation for why some viscoelastic fluids form beads and others do not was decades in the making. The origins of the work can be traced to Pasquali's and Basaran's doctoral research adviser, L.E. "Skip" Scriven of the University of Minnesota. Pasquali said Scriven worked out the basics of the competition between capillary, inertial and viscous forces in flows during the 1970s and 1980s. In the mid-1990s, du
'/>"/>

Contact: David Ruth
druth@rice.edu
713-348-6327
Rice University
Source:Eurekalert

Page: 1 2

Related biology news :

1. Microbes answer more questions collectively
2. U of I researchers say foliar fungicides may not be the answer for hail-damaged corn
3. Microbial answer to plastic pollution?
4. An answer to another of lifes big questions
5. Bubble physicist counts bubbles in the ocean to answer questions about climate, sound, light
6. Studying hair of ancient Peruvians answers questions about stress
7. Are sterile mosquitoes the answer to malaria elimination?
8. Avoiding dangerous climate change: Is geo-engineering the answer?
9. Critical Zone Observatory seeks to answer climate change questions
10. All tied up: Tethered protein provides long-sought answer
11. Researcher looks for answers about unique disease-resistant gene
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/25/2014)... Stowers Institute for Medical Research have identified ... found pheromones crucial to triggering the mating process in ... a male mouse detect pheromones that indicate when a ... him know if the female mouse is ovulating and ... to trigger mating. Stowers, researchers believe mice developed this ...
(Date:7/25/2014)... Florida , July 25, 2014 ... more consumers are turning to digital technology for online ... (OTCBB: NXTD), Google Inc. (NASDAQ: GOOG ), ... (NYSE: V ), Apple Inc. (NASDAQ: ... NXT-ID, Inc., (OTCQB: NXTD) a biometric authentication company ...
(Date:7/24/2014)... -- Keryx Biopharmaceuticals, Inc. (Nasdaq:KERX) (the "Company") announced the ... Phase 3 study of Zerenex (ferric citrate), the Company,s ... of hyperphosphatemia in patients with end-stage renal disease (ESRD) ... delivery with FErric CiTrate in EsrD) was published online ... of Nephrology ( JASN ). , ...
Breaking Biology News(10 mins):It takes two to court 2It takes two to court 3Consumer Needs for Identity Theft Security Grows with Popularity of Latest Smart Technology Products - Biometrically Secure Digital Wallet to Replace Credit Card Dependency 2Consumer Needs for Identity Theft Security Grows with Popularity of Latest Smart Technology Products - Biometrically Secure Digital Wallet to Replace Credit Card Dependency 3Consumer Needs for Identity Theft Security Grows with Popularity of Latest Smart Technology Products - Biometrically Secure Digital Wallet to Replace Credit Card Dependency 4Consumer Needs for Identity Theft Security Grows with Popularity of Latest Smart Technology Products - Biometrically Secure Digital Wallet to Replace Credit Card Dependency 5Consumer Needs for Identity Theft Security Grows with Popularity of Latest Smart Technology Products - Biometrically Secure Digital Wallet to Replace Credit Card Dependency 6Zerenex™ (ferric citrate) long-term Phase 3 study results published in JASN 2Zerenex™ (ferric citrate) long-term Phase 3 study results published in JASN 3Zerenex™ (ferric citrate) long-term Phase 3 study results published in JASN 4
... A research team led by scientists at the Virginia Bioinformatics ... mechanism that allows dangerous fungal microbes to infect plants and ... of new intervention strategies to protect plant, and even some ... in the July 23 edition of the journal Cell ...
... "Many people," says Dr. Eeva Karjalainen, of the Finnish Forest ... out in nature. But not many of us know that ... nature." Forests and other natural, green settings ... and increase overall happiness. Forest visits may also strengthen our ...
... in Chinese . , Formation of new ... sustained tumor growth and cancer metastasis. Recently, clinically available ... been available to improve patient survival in some cancer ... using nonsurgical methods would greatly complement current therapies and ...
Cached Biology News:Scientists discover how deadly fungal microbes enter host cells 2Noninvasive MR imaging of blood vessel growth in tumors using nanosized contrast agents 2Noninvasive MR imaging of blood vessel growth in tumors using nanosized contrast agents 3
(Date:7/25/2014)... July 25, 2014 Sinovac Biotech Ltd. (Nasdaq: ... China , today announced that it will ... June 30, 2014, after market close on Thursday, August 14, ... to the market opening on Friday, August 15, 2014, at ... China Standard Time) to review the Company,s financial results and ...
(Date:7/24/2014)... 24, 2014 -- A novel combination of microscopy and ... Energy,s Oak Ridge National Laboratory an unprecedented look at ... physical and electrochemical properties. , The research team ... the surface of a perovskite manganite, a complex material ... avenue to understand surface behavior could benefit researchers who ...
(Date:7/24/2014)... MESA, Calif. , July 24, 2014  Now ... close to home. Rehealth Regenerative Therapies , located ... athletes and other physically active people a new health ... Regardless of age, countless patients suffer from ... sport activities, such as muscle tears, torn rotator cuff, ...
(Date:7/24/2014)... Calif. , July 24, 2014  ECC West ... Denver, Colorado with University College Hospital (UCH) ... a development project to finance, design, construct, and operate ... Nigeria . Under the first of ... prepare scoping documents and funding applications. UCH Ibadan intends ...
Breaking Biology Technology:Sinovac to Host Conference Call to Report Second Quarter 2014 Unaudited Financial Results 2ORNL study reveals new characteristics of complex oxide surfaces 2Stem Cells In Sports Injuries, Joints And Muscular Pain 2Stem Cells In Sports Injuries, Joints And Muscular Pain 3ECC Signs a Contract for the Finance, Design, and Construction of a Premier Cancer Institute in Ibadan, Nigeria 2
... that want the benefits of cutting-edge health care possibilities ... sub-populations need to foster the new science at ... by Nature Publishing Group. , In a special six-paper ... (NRG), researchers from the McLaughlin-Rotman Centre for Global Health ...
... a significant milestone for the growing open source clincial trials ... towards the needs of regulated industry sponsored clinical trials. ... ... 2008 -- Akaza Research announces the availability of OpenClinica 2.5, ...
... ABBOTT PARK, Ill., Sept. 19 Abbott (NYSE:,ABT) will ... 2008, before the market opens., The announcement will ... call at 8 a.m. Central time (9 a.m. Eastern), ... at, http://www.abbottinvestor.com . An archived edition of the call ...
Cached Biology Technology:As personalized, genomic medicine takes off, four developing countries show the way for others 2As personalized, genomic medicine takes off, four developing countries show the way for others 3As personalized, genomic medicine takes off, four developing countries show the way for others 4As personalized, genomic medicine takes off, four developing countries show the way for others 5As personalized, genomic medicine takes off, four developing countries show the way for others 6As personalized, genomic medicine takes off, four developing countries show the way for others 7Akaza Research Releases New Version of OpenClinica Electronic Data Capture (EDC) Software; Targets Industry Clinical Trials 2Akaza Research Releases New Version of OpenClinica Electronic Data Capture (EDC) Software; Targets Industry Clinical Trials 3
... Imaging System, Professional Package Superior Protein ... Range: The ProXPRESS 2D Proteomic Imaging System ... for both proteomic and general life science ... enabling the use of all dyes in ...
... Corning single use spatulas have been ... samples. They are for those interested in ... reusable spatulas. Each spatula is individually packaged, ... CLS number is a new product number, ...
... digital valve, just 8 mm in width. ... in a single glass-reinforced, PBT (Polybutylene Terephthalate) molded ... width. , Meets a range of pressure requirements ... Satisfies a 0.016 sccm leakage specification (0.2 sccm ...
... FilterMate is a compact, versatile system that ... 96- or 24-well microplates into a solid ... liquid scintillation and gamma counter. The FilterMate ... for applications such as cell proliferation, receptor ...
Biology Products: