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Recent News and Articles on the Keywords: web + contact + 155  Related to the article below (Last Update: 8/5/2008)

Health & support calendar
SouthCoastToday.com, MA - Aug 3, 2008
For details, contact Susan Arsenault at (508) 992-6553, Ext. 155. www.gnbchc.org. 874 Purchase St., New Bedford. Parents Enduring Grief: For parents who ...
Essex Announces Second Quarter 2008 Earnings Results
MarketWatch - Jul 30, 2008
If you are unable to access the information via the Company's Web site, please contact the Investor Relations department at investors@essexpropertytrust.com ...
News For Your Web Site
dBusinessNews Boston (press release), MA - Jul 27, 2008
Corrigan, fighting at 155 pounds and standing 5?11?, started off the night for USMMA in his first professional fight against Ruben Gonzalez. ...
IPC's country magazine the Field reborn aged 155
guardian.co.uk, UK - Jul 15, 2008
Last year, IPC launched a web portal for its shooting titles including the Field and Sporting Gun. "We wanted to do a little spring cleaning to the magazine ...
Sign-ups
El Paso Times, TX - Aug 3, 2008
Information: 581-7667 El Paso Fencing Center #155.?1035 Belvidere St. @ Westwind. All that ?is required to get your name on The Cup is the last touch of the ...
Hunting/fishing report
San Diego Union Tribune, United States - Jul 15, 2008
For more info contact Anne Carey at (858) 674-2901 or web site: www.fs.fed.us/r5/cleveland/projects . . . . The Cleveland National Forest will conduct Open ...
User-Centered Policy Evaluations of Section 508 of the ...
RedOrbit, TX - Jul 31, 2008
By Jaeger, Paul T The author examines user-centered evaluations of e-government Web sites for compliance with a policy related to persons with disabilities: ...
K&S Without Wire and With Orthodyne
Semiconductor International - Aug 1, 2008
Heraeus, the precious metals and technology group headquartered in Hanau, Germany, is a global, private company with over 155 years of tradition. ...
Users allege MobileMe lacks true 'push'
BetaNews - Jul 14, 2008
A forum specifically on the subject of push services with MobileMe on Apple's support site included some 155 topics, most of which were complaints of some ...
High school notebook: Okeechobee's Pryor named to Top 100
Sebastian Sun, FL - Aug 1, 2008
He's also caught 15 passes for 155 yards. Lincoln Park Academy is seeking head coaches for boys and girls soccer. According to athletic director John ...
Source: Google News

Bystander cardiopulmonary resuscitation. Concerns about mouth-to-mouth contact -
CJ Locke, RA Berg, AB Sanders, MF Davis, MM … - Archives of Internal Medicine, 1995 - Am Med Assoc
You are seeing this message because your Web browser does not support basic Web
standards. ... Vol. 155 No. ... Concerns about mouth-to-mouth contact. ...

An efficient method for finding the minimum of a function of several variables without calculating … -
MJD Powell - The Computer Journal, 1964 - Br Computer Soc
... The Computer Journal 1964 7(2):155-162; doi:10.1093/comjnl/
7.2.155 ? 1964 by British Computer Society ...

Evaluating the use of the Web for tourism marketing: a case study from New Zealand -
B Doolin, L Burgess, J Cooper - Tourism Management, 2002 - Elsevier
... basic Web page with an email contact, to providing ... Arnett, L. Capella and B. Beatty ,
Web sites of ... SummaryPlus | Full Text + Links | PDF (155 K) | View Record ...

Measuring Preferences by Subjective Well-Being
BS Frey, A Stutzer - Journal of Institutional and Theoretical Economics, 1999 - ideas.repec.org
... text, BibTeX, RIS (EndNote), ReDIF Handle: RePEc:mhr:jinste:urn:sici:0932-4569(199912)
155:4_755:mpbsw_2.0.tx_2-6. Contact details of provider: Web page: http ...
-

Save the Time of the Surfer: Evaluating Web Sites for Users -
SW Sowards - Library Hi Tech, 1997 - emeraldinsight.com
... Volume: 15 Issue: 3/4 Page: 155 - 158 DOI ... Keywords: Design, Evaluation, Web sites
Article Type: Research paper ... Conferences; Resources; Join/Register; Contact Us. ...

From the following article -
Y Shiloh, P Box, NPG Contact - Nature Reviews Cancer, 2003 - nature.com
... ATM and related protein kinases: safeguarding genome integrity. Yosef Shiloh. Nature
Reviews Cancer 3, 155-168 (March 2003). doi :10.1038/nrc1011. ...

Cross Holdings in Germany
M Adams - Journal of Institutional and Theoretical Economics, 1999 - ideas.repec.org
... plain text, BibTeX, RIS (EndNote), ReDIF Handle: RePEc:mhr:jinste:urn:sici:0932-
4569(199903)155:1_80:chig_2.0.tx_2-3. Contact details of provider: Web page: http ...
-

Censored Regression Quantiles -
JL Powell - Journal of Econometrics, 1986 - ideas.repec.org
... are available: HTML, plain text, BibTeX, RIS, ReDIF Handle: RePEc:eee:econom:v:32:
y:1986:i:1:p:143-155 Keywords: Contact details of provider: Web page: http ...

DATASTAR WEB: A COMPARISON WITH ?CLASSIC? DATASTAR COMMAND LANGUAGE SEARCHING -
AL Barker - Online Information Review, 1998 - emeraldinsight.com
... 1998 Volume: 22 Issue: 3 Page: 155 - 167 DOI ... interfaces, Internet, Online searching,
World Wide Web Article Type ... Conferences; Resources; Join/Register; Contact Us ...

Large Contact Angles of Plant and Animal Surfaces -
ABD Cassie, S Baxter - Nature, 1945 - nature.com
Letters to Editor. nature 155, 21-22 (06 January 1945) | doi :10.1038/155021a0.
Large Contact Angles of Plant and Animal Surfaces. ABD CASSIE & S. BAXTER. ...

Source: Google Scholar

Contact: Charles Loebbaka
c-loebbaka@northwestern.edu
847-491-4887
Northwestern University

Synthetic adhesive mimics sticking powers of gecko and mussel

EVANSTON, Ill. -- Geckos are remarkable in their ability to scurry up vertical surfaces and even move along upside down. Their feet stick but only temporarily, coming off of surfaces again and again like a sticky note. But put those feet underwater, and their ability to stick is dramatically reduced.

Water is an enemy of adhesives, which typically do not work well in wet environments -- think of how long a bandage on your finger lasts. Now two Northwestern University biomedical engineers have successfully married the gecko’s adhesive ability with that of an animal well known for its sticking power underwater: the mussel.

Combining the important elements of gecko and mussel adhesion, the new adhesive material, called “geckel,” functions like a sticky note and exhibits strong yet reversible adhesion in both air and water.

The findings, which could lead to applications in medical, industrial, consumer and military settings, will be published as the cover story in the July 19 issue of the journal Nature.

“The geckel material should be useful for reversible attachment to a variety of surfaces in any environment,” said Phillip B. Messersmith, professor of biomedical engineering at Northwestern’s McCormick School of Engineering and Applied Science and an author of the paper.

“I envision that adhesive tapes made out of geckel could be used to replace sutures for wound closure and may also be useful as a water-resistant adhesive for bandages and drug-delivery patches. Such a bandage would remain firmly attached to the skin during bathing but would permit easy removal upon healing.”

A gecko’s strong but temporary adhesion comes from a mechanical principle known as contact splitting. Each gecko foot has a flat pad that is densely packed with very fine hairs that are split at the ends, resulting in a greater number of contact points than if the hairs were not split. (The diameter of one of the split hairs is as small as 200 nanometers.) More contact points between hairs and surface result in a significant increase in adhesion force. Flies, bees and other insects also use this strategy.

Many researchers before Messersmith have attempted to mimic the gecko foot but have had limited success in replicating the reversible property over many contact cycles. No synthetic mimics have been able to stick past two contact/release cycles, and none work underwater.

In contrast, the geckel material created by Messersmith and Haeshin Lee, one of his graduate students and lead author of the Nature paper, sticks through 1,000 contact/release cycles (like a gecko) and performs extremely well underwater, with high adhesion strength (like a mussel). The material performs similarly in dry environments.

“I was reading a research paper about the drop of adhesion in geckos when underwater, and it hit me -- maybe we could apply what we know about mussels to make gecko adhesion work underwater,” said Messersmith.

In earlier work, he and his research group created mussel-mimetic polymers and have studied extensively an amino acid called 3,4-L-dihydroxyphenylalanine (DOPA), which is found in high concentration in the “glue” proteins of mussels.

Messersmith and Lee imitated a gecko’s foot by nanofabricating arrays of silicone pillars that exhibit enough flexibility to adapt to rough surfaces. Next they brought in the mussel power, coating the pillars with a very thin layer of a synthetic polymer, designed by the researchers, that mimics the wet adhesive mussel proteins.

The researchers measured the performance of the geckel material using an atomic force microscope. They found that pillar arrays coated with the mussel-mimetic polymer improved wet adhesion 15-fold over uncoated pillar arrays. (The pillars in the arrays tested were 400 nanometers in diameter and 600 nanometers high.)

In a control experiment, the researchers took the DOPA out of the polymer coating and found the adhesion strength dropped rapidly, illustrating the importance of the synthetic amino acid. DOPA, said Messersmith, is critical to the polymer sticking both to the pillars and to the surface with which the pillars are interacting.

“We have demonstrated a proof of concept, but it will be necessary to develop a patterning approach that works on a large scale,” said Messersmith, who believes they can produce a material with even better adhesion. “The challenge will be to scale up the technology and still have the geckel material exhibit adhesive behavior.”

###

The work was supported by the National Institutes of Health and NASA.

(Source contact: Phillip Messersmith at 847-467-5273 or philm@northwestern.edu)

NORTHWESTERN NEWS: www.northwestern.edu/newscenter/

 
 
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