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:9/18/2014)... tonight at the third annual Golden Goose Award ceremony ... infants and in paving the way for the telecommunications ... by the National Science Foundation, the National Institutes of ... honored at a ceremony at the Library of Congress ... Congress will be on hand to help present their ...
(Date:9/18/2014)... of the fish world, are the ideal animal in ... They,ve moved from the ocean into tens of thousands ... time changing their skeleton to adapt to the new ... of sticklebacks now have turned up one of the ... simple change in that gene,s regulation in a freshwater ...
(Date:9/17/2014)... were instrumental in the creation of the Santa Ana ... the fire threat potential of the powerful, hot, dry ... an inferno. The index was introduced Sept. 17 by ... San Diego Gas and Electric. , The index includes ... will be used to help fire agencies and other ...
Breaking Biology News(10 mins):3rd annual Golden Goose award ceremony honors 8 researchers; Unusual work had big results 2Counting fish teeth reveals regulatory DNA changes behind rapid evolution, adaptation 2Counting fish teeth reveals regulatory DNA changes behind rapid evolution, adaptation 3UCLA scientists play key role in developing new Santa Ana Wildfire Threat Index 2
... December 12, 2012 Cell aging, or cellular senescence, ... to tumor development. Activated oncogenes are able to induce ... (OIS) could play a key role in future cancer ... in the regulation of OIS. This study is published ...
... plant dye once prized throughout the Old World to make fiery ... for a new "green" battery. Chemists from The ... and the U.S. Army Research Laboratory to develop a non-toxic and ... roots of the madder plant ( Rubia species). More ...
... engineering researchers at Rensselaer Polytechnic Institute shows, for the ... significant role in the strength of our bones. The ... fighting osteoporosis and lowering the risk of bone fracture. ... the study details how fractures in healthy bones begin ...
Cached Biology News:Previously unknown mechanism identified in oncogene-induced senescence 2Ancient red dye powers new 'green' battery 2Ancient red dye powers new 'green' battery 3Battling brittle bones... with broccoli and spinach? 2
(Date:9/18/2014)... 18, 2014 ... ) has announced the addition of ... Strategic Business Report" report to ... report analyzes the worldwide markets for ... the following Product Segments: Polymeric Materials, ...
(Date:9/18/2014)... Washington, D.C. (PRWEB) September 18, 2014 ... Dick Durbin and Sen. Jim Risch for National Lab ... research projects from across the national laboratory system. Durbin ... Caucus, which aims to increase awareness of the reach ... breakthrough technologies and discoveries to address some of our ...
(Date:9/18/2014)... , Sept. 18, 2014 Research ... the "Global N-acetylcysteine Industry Report 2014" ... Global N-acetylcysteine Industry Report 2014 is a professional ... the global N-acetylcysteine industry. The report ... definitions, classifications, applications and industry chain structure. The ...
(Date:9/18/2014)... 2014 Research and Markets has ... (Polymerase Chain Reaction, In-situ hybridization, Immunohistochemistry) Market - Trends ... The global companion diagnostics market is ... 2014 to 2019. Factors such as rising need for ... diagnostics by the pharmaceutical industry, support from regulatory authorities, ...
Breaking Biology Technology:Biocompatible Materials - Global Strategic Business Report 2014 2Biocompatible Materials - Global Strategic Business Report 2014 3Lab Day Highlight Labs' Contribution to U.S. Competitiveness and Innovation 2Lab Day Highlight Labs' Contribution to U.S. Competitiveness and Innovation 3Global N-acetylcysteine Industry Report 2014 2Global Companion Diagnostics (Polymerase Chain Reaction, In-situ hybridization, Immunohistochemistry) Market - Trends & Forecasts to 2019 2Global Companion Diagnostics (Polymerase Chain Reaction, In-situ hybridization, Immunohistochemistry) Market - Trends & Forecasts to 2019 3
... Oramed Pharmaceuticals Inc. (OTCBB: ORMP.OB) ( http://www.oramed.com ... today that its work entitled "Evaluation of the Safety ... Volunteers" will be presented at the Eleventh Annual Meeting ... San Francisco, California. "The selection of Oramed ...
... 25, 2011 Reportlinker.com announces that a ... its catalogue: Global Automated ... http://www.reportlinker.com/p092467/Global-Automated-And-Rapid-Microbiological-Tests-Industry.html#utm_source=prnewswire&utm_medium=pr&utm_campaign=In_Vitro_Diagnostic This ... and Rapid Microbiological Tests in US$ Million ...
... some patients develop a potentially deadly blood infection from ... bodies have gene mutations that allow them to stick ... infections because of a biofilm of persistent bacterial bugs ... some strains of the bacteria, Staphylococcus aureus, have just ...
Cached Biology Technology:Oramed Pharmaceuticals Chosen to Present at the Diabetes Technology Meeting (October 27-29, 2011; San Francisco, CA) 2Global Automated And Rapid Microbiological Tests Industry 2Global Automated And Rapid Microbiological Tests Industry 3Global Automated And Rapid Microbiological Tests Industry 4Global Automated And Rapid Microbiological Tests Industry 5Global Automated And Rapid Microbiological Tests Industry 6Global Automated And Rapid Microbiological Tests Industry 7Global Automated And Rapid Microbiological Tests Industry 8Global Automated And Rapid Microbiological Tests Industry 9Global Automated And Rapid Microbiological Tests Industry 10Global Automated And Rapid Microbiological Tests Industry 11Global Automated And Rapid Microbiological Tests Industry 12Global Automated And Rapid Microbiological Tests Industry 13Global Automated And Rapid Microbiological Tests Industry 14Global Automated And Rapid Microbiological Tests Industry 15Global Automated And Rapid Microbiological Tests Industry 16Global Automated And Rapid Microbiological Tests Industry 17Global Automated And Rapid Microbiological Tests Industry 18Global Automated And Rapid Microbiological Tests Industry 19Global Automated And Rapid Microbiological Tests Industry 20Global Automated And Rapid Microbiological Tests Industry 21Global Automated And Rapid Microbiological Tests Industry 22Global Automated And Rapid Microbiological Tests Industry 23Global Automated And Rapid Microbiological Tests Industry 24Global Automated And Rapid Microbiological Tests Industry 25Global Automated And Rapid Microbiological Tests Industry 26Study offers clues as to why some patients get infections from cardiac implants 2Study offers clues as to why some patients get infections from cardiac implants 3Study offers clues as to why some patients get infections from cardiac implants 4Study offers clues as to why some patients get infections from cardiac implants 5
... Red Taq DNA Polymerase is a thermostable ... activity in primer extension and other molecular ... dye which provides easy and quick identification ... and allows confirmation of complete mixing. The ...
... Kit (E-22013) provides,researchers with a sensitive ... in solution. This fluorescence-based assay can ... (Figure 1). The assay,measures lysozyme activity ... labeled to such a degree that ...
RNA oligomers from 10 to 50 bases purified by PAGE and MS-checked. RNAs are supplied dried and fully deprotected....
... Analog) is used for the synthesis of ... transcription reactions. Substitution of cap analog for ... an in vitro transcription reaction results in ... a large fraction of the transcripts. Capped ...
Biology Products: