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:8/18/2017)... ... ... “Our Mountains to Climb: A Journey of Love and Faith Through Trials”: ... the faith they shared to overcome struggles in life. “Our Mountains to Climb: A ... J. Corcoran, a retired teacher and happily married since 1999; the author’s personal experiences ...
(Date:8/18/2017)... , ... August 18, 2017 , ... ... marketers of high-quality anti-aging skincare solutions, recently announced the launch of ... products are an affordable, yet effective alternative to expensive plastic surgery or in-patient ...
(Date:8/17/2017)... ... August 17, 2017 , ... Riccobene Associates Family Dentistry, ... Goldsboro, NC to its family of practices. Residents of Goldsboro will be able ... 15, 2017. , Riccobene Associates Family Dentistry, founded by Dr. Michael Riccobene ...
(Date:8/17/2017)... ... August 17, 2017 , ... ... of three years for its residential drug and alcohol detox program. This accreditation ... organization and shows the organization’s substantial conformance to the CARF standards. , Behavioral ...
(Date:8/17/2017)... ... August 17, 2017 , ... The 2017 Integrated Delivery ... systems to interact with their GPO and supplier partners. This year, Winifred Hayes, ... System Director of Clinical Value Analytics, have been invited to present “Episode-based Reimbursement ...
Breaking Medicine News(10 mins):
(Date:8/15/2017)... 2017 Diplomat Pharmacy, Inc. (NYSE: DPLO), is ... residents. Naloxone is available without ... retail pharmacy, G-3320 Beecher Road. ... Drug Administration, is intended to block or reverse the ... loss of consciousness. The medication is often carried by ...
(Date:8/11/2017)... -- DarioHealth Corp. (NASDAQ: DRIO), a leading global digital ... today announced that it will release its second quarter ... conference call at 9:00am ET. The Company will discuss ... its strategy and outlook for the remainder of 2017. The ... , Chief Executive Officer, and Zvi Ben-David , ...
(Date:8/7/2017)... 2017 Zimmer Biomet Holdings, Inc. (NYSE and SIX: ... its Board of Directors has approved the payment of a ... 2017. The cash dividend ... October 27, 2017 to stockholders of record as of the ... dividends are subject to approval of the Board of Directors ...
Breaking Medicine Technology: