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:12/2/2016)... ... ... years, Doctors on Liens has published a directory of the top doctors working ... When the company started in 1997, the directory was a single page focusing on chiropractors ... directory features a vast array of medical specialists stretching from Sacramento to San ...
(Date:12/2/2016)... ... , ... Center for Autism and Related Disorders (CARD) Portland today announced plans ... (ASD) and other developmental disabilities. The group, which is being launched with the help ... opportunity to share stories and advice, seek help, and continue their education on how ...
(Date:12/2/2016)... , ... December 02, 2016 , ... ... interview of two ostomy patients, standing as living proof that attitude and determination ... digestive diseases and issues that spike around the holidays. This campaign will offer ...
(Date:12/2/2016)... ... December 02, 2016 , ... ... version of its SaaS LIMS, CloudLIMS Lite. CloudLIMS Lite helps biobanks, clinical, research ... labeling, storing, shipping and disposal. The new version is a faster and a ...
(Date:12/2/2016)... ... 2016 , ... Rijuven Corp launches rejiva ( http://www.rejiva.com ), a unique wearable ... wearable health technology on the market can deliver all that rejiva can. , “Rejiva ... about their health than the usual heart rate and steps taken”, adds Evens Augustin, ...
Breaking Medicine News(10 mins):
(Date:12/2/2016)... On Thursday, December 1st 2016, ... research, development and innovation in the biopharmaceutical industry at ... in the presence of Sergey Tsyb, Vice Minister of ... , Natalia Sanina, First Vice Chairman of the ... of Roszdravnadzor, National Service of Control in Healthcare, Sergey ...
(Date:12/2/2016)... , December 2, 2016 bioLytical Laboratories, ein ... HIV-Selbsttest, bei den Mitgliedern des Apothekenbundes von Kenia eingeführt. ... ... INSTI HIV Self Test! (PRNewsFoto/bioLytical Laboratories) ...      (Photo: http://photos.prnewswire.com/prnh/20161201/444905 ) ...
(Date:12/2/2016)... 2016 Lianluo Smart Limited (Nasdaq: ... which develops, markets and sells medical devices and ... and international markets, recently attended the ... New Progress Forum, co-hosted by the Institute of ... , Guangdong Provincial People,s Hospital and Cardiology Department ...
Breaking Medicine Technology: