Navigation Links
Gaps in adhesion
Date:11/17/2008

s adhesive. As the researchers in Mainz have now discovered, the number of the links in the chain carrying the binding dopa adjuncts has no overall relevance for the chain's adhesiveness, provided it is not less than 10% of the total.

The researchers measured the force which allowed them to detach different polymer chains from a surface. They tested polymers that consisted completely of links with the binding dopa adjunct and some where it was only present on a fifth or a tenth of the links. The force required to pull a single polymer from the surface was always the same: 67 piconewtons. This is equivalent to a millionth of the weight force of a flea. This force alone could not keep a shellfish on the bottom of the sea. However, the creatures attach themselves firmly with a dab containing innumerable polymer chains, which allows them to brave the movement of the waves.

"The fact that the adhesive effect is, to a certain extent, independent on the number of binding sites could be used to give the other links in the polymer other functions," says Hans-Jrgen Butt. For example, chemists could manufacture a polymer that adheres equally to different materials. Dopa bonds predominantly with metals and minerals. Chemists could provide other links in the polymer chain with adjuncts that adhere to wood, glass or bone. Adhesives which bond metal and bone would be interesting for securing artificial joints," says Wolfgang Tremel.

At first, the researchers in Mainz were puzzled as to why the adhesive strength of the polymer chains was largely independent of the number of adhesive links. "Normally, we imagine that an adhesive polymer is like a strip of scotch tape that adheres over the whole of its length," says Hans-Jrgen Butt. However, the more an adhesive strip bonds to a surface, the harder it is to pull it off. This model, which describes the adhesiveness of a polymer as a continuous force, does not apply to shellfish proteins and their artificial
'/>"/>

Contact: Prof. Hans-Juergen Butt
butt@mpip-mainz.mpg.de
49-613-137-9110
Max-Planck-Gesellschaft
Source:Eurekalert  

Page: 1 2 3

Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Gaps in adhesion
(Date:4/17/2014)... Clemson professor Rajendra Singh Thursday as a "Champion ... expand solar deployment in the residential, commercial and ... Professor of Electrical and Computer Engineering and director ... a local hero leading the charge across the ... solar power and driving policy changes at the ...
(Date:4/17/2014)... on a novel method to help kidney stone ... effective treatment possible., Kidney stones represent a major ... If left untreated, apart from being particularly painful, ... complications. In many patients treated successfully, stone recurrence ... pathological approach to diagnosis and treatment needs to ...
(Date:4/17/2014)... researchers have detected new early-warning signs of the potential ... have far-reaching implications for the diagnosis and treatment of ... million Americans. , "We had not expected to see ... stages," said Ann Elsner, professor and associate dean in ... the study. "We set out to study the early ...
Breaking Biology News(10 mins):White House honors Clemson professor as 'Champion of Change' for solar deployment 2New technique detects microscopic diabetes-related eye damage 2New technique detects microscopic diabetes-related eye damage 3
... step in the ongoing battle against secondhand tobacco smoke. They ... immediately detect the presence of secondhand smoke and even third-hand ... about the size of a matchbox car, the device uses ... A sensor chip then records the data on an SD ...
... University] A key advance, newly reported by chemists ... cheaper and more sustainable way to make acrylate, an ... fabrics to diapers. Chemical companies churn out billions ... propylene, a compound derived from crude oil. "What we,re ...
... after the FDA approved Kalydeco (Vx-770), the first drug of ... University of Missouri researchers believe they have found exactly how ... the future. Described in the current issue of the ... have redefined a key regulatory process in the defective protein ...
Cached Biology News:Scientists create new tools for battling secondhand smoke 2Scientists create new tools for battling secondhand smoke 3Breakthrough could lead to cheaper, more sustainable chemical production 2Discovery could increase efficacy of promising cystic fibrosis drug 2Discovery could increase efficacy of promising cystic fibrosis drug 3Discovery could increase efficacy of promising cystic fibrosis drug 4
(Date:1/15/2014)... 15, 2014 Two champions of science, ... sponsorship of an annual competition for middle and high ... to, innovative STEM study. The competition presents students with ... of Engineering Aptitude, Mathematics, and Sciences is a ...
(Date:1/15/2014)... Freeslate, Inc ., the leading provider of ... one of India’s top five pharmaceutical companies, has received ... for high throughput solid form screening. , Lupin, ... range of quality, affordable generic and branded formulations and ...
(Date:1/14/2014)... 2014 Carahsoft and CDS Federal Services ... 2014 at 2pm EST (11am PST), “Natural Language Processing: ... on how technology can turn raw, heterogeneous data into ... agencies. The online webinar will last approximately one hour. ...
(Date:1/14/2014)... 2014 EquitiesIQ, a leading informational research ... Alliqua is an emerging biomedical company acquiring, developing, manufacturing, ... market. , Free report download: http://equitiesiq.com/reports/alliqua/ , ... management team and Board, which launched the company’s new ...
Breaking Biology Technology:Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 2Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 3Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 4Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 5Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 2Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 3Webcast - Natural Language Processing: Converting Raw Data into Actionable Knowledge – Hosted by Carahsoft and CDS Federal Services 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 3
... Mental Health Programs Supported by a Grant from Otsuka ... America Pharmaceutical, Inc., ... named three nonprofit organizations and one individual,as the recipients of the ... presented at the 2008 APF Annual Benefit in,Washington, D.C. Each organization ...
... the patient,s own whole blood, SOMERS, Conn., May ... the health professionals who manage patients on heart and,lung ... Blood,Resources, online waste calculator can be used to estimate ... machines most commonly used,during heart surgery to salvage the ...
... and some clever chemistry, University of California, Berkeley, researchers ... the sugar coating on their cells. , This novel ... that coat cells is a new tool for those ... because its transparent embryos allow easy observation of living ...
Cached Biology Technology:American Psychiatric Foundation Announces Recipients of 2008 Awards for Advancing Minority Mental Health 2American Psychiatric Foundation Announces Recipients of 2008 Awards for Advancing Minority Mental Health 3American Psychiatric Foundation Announces Recipients of 2008 Awards for Advancing Minority Mental Health 4American Psychiatric Foundation Announces Recipients of 2008 Awards for Advancing Minority Mental Health 5Global Blood Resources' On-Line Calculator Reveals Wasted Blood Costs by Blood Salvage Machines During Heart Surgery to be in the Billions 2Global Blood Resources' On-Line Calculator Reveals Wasted Blood Costs by Blood Salvage Machines During Heart Surgery to be in the Billions 3Glowing zebrafish help researchers track role of sugars in the cell 2Glowing zebrafish help researchers track role of sugars in the cell 3
... This kit allows for quick and reproducible immunoprecipitation ... The system is more reproducible than regular IPs, ... protein A/G agarose without disrupting the agarose bed. ... and Release is reversible, and elution of the ...
... Polyclonal Antibody, Unconjugated ... a dilution of 1/100. IP: Use ... Use at an assay dependent dilution. ... tested in other applications. Optimal ...
Membrane Proteins from over 50 different human Alzheimer, Diabetic, Liver Cirrhosis, and Lupus diseased tissues are available....
... Using multicolor analysis in a modern flow ... cells that are differentially labeled with fluorescent ... dyes typically used for cell labeling are ... by a flow cytometers filters. Thus, the ...
Biology Products: