Navigation Links
Virus filters for medical diagnosis
Date:6/25/2009

This release is available in German.

Providing reliable evidence of viruses in human blood presently requires time- and labor-intensive molecular-biological procedures. Established methods are particularly hard pushed to produce evidence when the viral burden is very low, for example during a phase of therapy. This could soon change. While developing new types of micro-pumps without movable parts, scientists from the Fraunhofer Institute for Biomedical Engineering IBMT came across an unexpected phenomenon: stable turbulence structures formed in the microscale pump channels. The nano- and microparticles actually intended to verify the pump effect accumulated in large quantities in the channels. The vortex patterns completely filled the whole microchannel, creating a virtually 100% trap for the particles that followed the generated flow profile, although there is a very large cross-section to flow through. "The development of flow vortices is nothing unusual on the macroscopic scale. However, in microchannels the flow lines almost run in parallel," explains Richard Stein from the IBMT. "The question, therefore, was, how is it possible for vortices to be formed from this which were sufficiently stable and effective for the concentration of nanoparticles?"

Experiments were not successful in determining the parameters by which the filter effect could be systematically controlled. This is because in the pump mechanism examined, high-frequency electrical traveling waves propel the fluid into the microchannels, superimposing a large number of effects on one another.

"In order to understand the complex procedures, there was a clear need for a theoretical description. My task was to describe the surprising phenomenon and to make it controllable," reflects Richard Stein. In his thesis "Mathematical modeling, analysis and numerical simulation of electrothermally driven micropumps", Richard Stein succeeded in explaining the development of the vortex pattern. To this end, he had to factor in all the relevant processes of an electrical, thermal and hydrodynamic nature in a three-dimensional model. Mr. Stein will receive the 1st Hugo Geiger Prize for this paper. The findings contained in the paper explain the observed effects completely, so that now both effective micropumps and efficient particle filters can be developed and built for many biomedical applications.


'/>"/>

Contact: Stephanie Schwarz
stephanie.schwarz@ibmt.fraunhofer.de
49-331-581-87101
Fraunhofer-Gesellschaft
Source:Eurekalert  

Related medicine news :

1. New Vaccine from Intervet/Schering-Plough Animal Health is First for Canine Influenza Virus
2. HIV Atlas Shows Virus Targeting Minorities
3. Hepatitis C Virus Market Will Expand Dramatically From $2 Billion in 2008 to Nearly $7.7 Billion in 2013
4. Lethality of H1N1 Influenza Virus Increasing According to Latest Replikin Analysis of Virus Peptide Genomic Data
5. DEP Asks Pennsylvanians to Help Battle West Nile Virus
6. Aethlon Medical Releases Shareholder Letter to Discuss the Treatment of Hepatitis-C Virus (HCV)
7. CEL-SCI Expands Testing of Its Vaccine to Determine Efficacy Against More Virulent Strain of H1N1 Swine and Other Influenza Viruses
8. Health Department Reports Pennsylvanias First Death Due to 2009 Novel Influenza A/H1N1 Virus
9. Global Testing Shows No Variation in Swine Flu Virus
10. New arenavirus discovered as cause of hemorrhagic fever outbreak in South Africa and Zambia
11. Study to Investigate AHCC and the Swine Flu Virus
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Virus filters for medical diagnosis
(Date:2/24/2017)... ... February 24, 2017 , ... Only two months after ... Travel Market (ILTM) show in Cannes (France), XO Private has initiated a second print-run ... 420-page book measures almost a metre across when open, weighs in at more than ...
(Date:2/24/2017)... , ... February 24, 2017 , ... ... of Liberty University, has officially announced the appointment of Peter A. Bell, DO, ... of Osteopathic Medicine (LUCOM), beginning April 10. Dr. Bell comes to Liberty ...
(Date:2/24/2017)... ... February 24, 2017 , ... With ... is so critically important that we all are aware of our options and ... is proud to announce the launch of its newest edition of "Vision and ...
(Date:2/24/2017)... , ... February 24, 2017 , ... With ProGlass Prism ... Pro X . Users have total control over position, rotation, distortion, edge softness, edge ... within Final Cut Pro X. , With ProGlass Prism users are given the tools ...
(Date:2/24/2017)... ... , ... The International Association of Eating Disorders Professionals (iaedp) announces the 2017 ... image mannequin art competition. Selected from 15 submissions from around the nation, the top ... 31st annual iaedp Symposium, March 22 – 26 in Las Vegas. , This year, ...
Breaking Medicine News(10 mins):
(Date:2/23/2017)... , Feb. 23, 2017 Visiomed, ... and services since 1997, is changing the landscape ... technology providing patients with pro-active, custom-made solutions. Recognizing ... for instant and affordable healthcare without walls, Visiomed ... high-level devices developed with healthcare professionals that is ...
(Date:2/23/2017)... 2017 ITL Limited, ( ASX: ITD ), an innovative ... half year ended 31 December 2016 compared with the previous corresponding ... be viewed here . Highlights ... 104%) Earnings per share of 2.2 cents (Dec ... (Dec 2015: $15.7m; up 11%) Profit before tax ...
(Date:2/23/2017)... DUBLIN , Feb. 23, 2017 Research ... Price Analysis and Strategies - 2016" report to their offering. ... The latest ... pricing data and benchmarks in the global Fibromyalgia market. ... are the key drugs marketed for Fibromyalgia and their clinical attributes? ...
Breaking Medicine Technology: