Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

UV light, coatings reduce bacterial adhesion up to 50 percent

24.08.2004


The combination of ultraviolet (UV) light and certain coatings can lower -- by 15 to 50 percent -- the ability of some types of bacteria to stick to a glass surface and cause contamination or biofouling, Penn State environmental engineers have found.



Dr. Baikun Li, assistant professor of environmental engineering, Penn State Harrisburg, says "Ultraviolet light has been used for many years as an environmentally friendly route to water disinfection. However, these new results indicate that ultraviolet light, combined with certain coatings, also may offer a ’green’ approach to keeping glass surfaces free of contamination."

Li described her results in a paper, "The Impact of Ultraviolet Light on Bacterial Adhesion to Glass and Metal-Oxide Coated Surfaces," at the American Chemical Society meeting, Sunday, Aug. 22, in Philadelphia. Her co-author is Dr. Bruce Logan, the Kappe professor of environmental engineering, Penn State’s University Park campus.


The Penn State researcher exposed flat glass surfaces (silica dioxide) coated with thin layers of silicon dioxide, titanium dioxide or tin dioxide to eight different strains of bacteria, including some disease-causing types, and two different wavelengths of UV light. Measurements showed that the lower wavelength UVC light (254 nm) lowered cell adhesion by 15 to 50 percent, depending on the type of bacteria, on both the titanium dioxide and tin dioxide coated surfaces. The higher wavelength UVA light (340nm) produced similar effects for glass coated with titanium dioxide but not with tin dioxide. Higher intensity light reduced adhesion more than lower intensity UV light.

Li says, "Our work is among the first studies of the combination of ultraviolet light and coatings to prevent biofouling. These early results are promising and suggest potential for further study and anti-biofouling application."

Barbara Hale | EurekAlert!
Further information:
http://www.psu.edu

More articles from Health and Medicine:

nachricht Biofilm discovery suggests new way to prevent dangerous infections
23.05.2017 | University of Texas at Austin

nachricht Another reason to exercise: Burning bone fat -- a key to better bone health
19.05.2017 | University of North Carolina Health Care

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Strathclyde-led research develops world's highest gain high-power laser amplifier

The world's highest gain high power laser amplifier - by many orders of magnitude - has been developed in research led at the University of Strathclyde.

The researchers demonstrated the feasibility of using plasma to amplify short laser pulses of picojoule-level energy up to 100 millijoules, which is a 'gain'...

Im Focus: Can the immune system be boosted against Staphylococcus aureus by delivery of messenger RNA?

Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.

Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....

Im Focus: A quantum walk of photons

Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.

The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....

Im Focus: Turmoil in sluggish electrons’ existence

An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.

We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...

Im Focus: Wafer-thin Magnetic Materials Developed for Future Quantum Technologies

Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.

Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Marine Conservation: IASS Contributes to UN Ocean Conference in New York on 5-9 June

24.05.2017 | Event News

AWK Aachen Machine Tool Colloquium 2017: Internet of Production for Agile Enterprises

23.05.2017 | Event News

Dortmund MST Conference presents Individualized Healthcare Solutions with micro and nanotechnology

22.05.2017 | Event News

 
Latest News

New insights into the ancestors of all complex life

29.05.2017 | Earth Sciences

New photocatalyst speeds up the conversion of carbon dioxide into chemical resources

29.05.2017 | Life Sciences

NASA's SDO sees partial eclipse in space

29.05.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>