Navigation Links
Reveal the enemy
Date:7/20/2009

This release is available in German.

Bacterial diseases are usually detected by first enriching samples, then separating, identifying, and counting the bacteria. This type of procedure usually takes at least two days after arrival of the sample in the laboratory. Tests that work faster, in the field, and without complex sample preparation, whilst being precise and error-free, are thus high on the wish list. A Spanish research team headed by Jordi Riu and F. Xavier Rius at the University Rovira i Virgili in Tarragona has now developed a new technique to make this wish come true. With a novel biosensor, they have been able to detect extremely low concentrations of the typhus-inducing Salmonella typhi. As reported in the journal Angewandte Chemie, their new method is based on electrochemical measurements by means of carbon nanotubes equipped with aptamers as bacteria-specific binding sites. If bacteria bind to the aptamers, the researchers detect a change in electrical voltage.

Aptamers are synthetic, short DNA or RNA strands that can be designed and made to bind a specific target molecule. An aptamer that specifically binds to salmonella has recently been developed. The Spanish researchers chose to use this aptamer for their biosensor. By means of additional functional groups, they securely anchored the aptamers to carbon nanotubes, which were deposited onto an electrode in an ultrathin layer.

In the absence of salmonella, the aptamers fit closely against the walls of the carbon nanotubes. If the biosensor is put into a salmonella-containing sample, the microbes stick to the aptamers like flies to flypaper. This influences the interaction between the aptamers and the nanotubes, which makes a change in the electrode voltage noticeable within seconds.

Using this biosensor, the researchers were able to detect a b
'/>"/>

Contact: Jordi Riu
jordi.riu@urv.cat
Wiley-Blackwell
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Childhood obesity indicates greater risk of school absenteeism, Penn study reveals
2. Study begins to reveal clues to the cause and progression of sepsis
3. Comet probes reveal evidence of origin of life, scientists claim
4. Structure of 450 million year old protein reveals evolutions steps
5. UF scientists reveal how dietary restriction cleans cells
6. Neural stem cell study reveals mechanism that may play role in cancer
7. New method reveals substances on surfaces of any kind
8. Study reveals predation-evolution link
9. IDEMA Reveals Program Highlights for DISKCON USA 2007
10. Study reveals possible genetic risk for fetal alcohol disorders
11. IDEMA Reveals Program Highlights for DISKCON USA 2007
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Reveal the enemy
(Date:3/24/2015)... WASHINGTON , March 24, 2015   NexID ... applications with critical security-authentication needs, today announced the beginning ... fake-finger-detection (FFD) solution. The company, based in ... announcement at the three-day Connect:ID Expo, which began here ... NexID said version 2.0 of its SDK boosts ...
(Date:3/23/2015)...  In the 2014 fiscal year, irs.gov recorded over ... figure accounts for a fraction of the estimated losses ... exceeds $11 billion globally. The polygraph has traditionally been ... occurred. Investor Mark Saint Juste along with ... partnered to administer the test in a new ...
(Date:3/20/2015)... -- NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" or ... growing mobile commerce market, announces its biometric payment technology, ... featured in 2015 "I Want That" International CES Special, ... the DIY Network.   DIY,s "I Want ... site of the 2015 International CES for a firsthand ...
Breaking Biology News(10 mins):NexID Begins Shipments Of Version 2.0 Fake-Finger-Detection Solution 2Polygraph Test Now Used to Protect Investors From Fraud 2Polygraph Test Now Used to Protect Investors From Fraud 3NXT-ID's Wocket Biometric Smart Wallet to Air on "I Want That" International CES Special 2NXT-ID's Wocket Biometric Smart Wallet to Air on "I Want That" International CES Special 3
... contribute to the greenhouse gas emissions that are causing climate change. ... How we travel, what we eat, what we consume and what ... our carbon footprint . How, though, do we measure ... to find out on April 26, when Louis S. Santiago ...
... children in the United States are obese, and in inner-city ... diets and physical inactivity are the main culprits, there is ... A study by Columbia University,s Mailman School of Public ... to higher concentrations of chemicals called polycyclic aromatic hydrocarbons, or ...
... of the most common types of human leukemia may ... to new research led by physician-scientists at the University ... Cancer Center. Published this week in the journal ... in the FLT3 gene as targets for acute myeloid ...
Cached Biology News:Measuring our carbon footprint 2Prenatal exposure to air pollution linked to childhood obesity 2Prenatal exposure to air pollution linked to childhood obesity 3An Achilles heel of AML 2An Achilles heel of AML 3
(Date:4/24/2015)... April 24, 2015  Pfenex Inc. (NYSE MKT: PFNX) ... biosimilar therapeutics including high value and difficult to manufacture ... offering of 6,000,000 shares of its common stock at ... Of the shares being offered, 2,610,000 are being offered ... offered by existing stockholders. Pfenex will not receive any ...
(Date:4/24/2015)... 24, 2015  Navitas Life Sciences is delighted to announce ... Clinical and Regulatory Services. Shalabh is a proven leader in ... CEO of Kinapse, as well as a Strategy consultant at ... - http://photos.prnewswire.com/prnh/20150423/201261LOGO ... "I am delighted to welcome Shalabh into this critical role ...
(Date:4/24/2015)... 2015 Seoul Semiconductor announced the ... applications in the lighting market. In recent ... this technology in emerging markets such as Russia, ... range of applications such as streetlight and area ... , First launched in 2005 the Acrich technology ...
(Date:4/23/2015)... (PRWEB) April 23, 2015 Athena San ... development of executive women in San Diego’s technology and ... 17th Annual Pinnacle Awards at their Gala on April ... Hotel. Register now at http://athenasd.org/events/ , The ... the Athena San Diego vision of fostering networking, risk ...
Breaking Biology Technology:Pfenex Inc. Announces Pricing Of Follow-on Offering 2Shalabh Kumar Joins Navitas Life Sciences to Lead their Clinical and Regulatory Services Teams 2Acrich Technology from Seoul Semiconductor Adopted in Installations Worldwide 2Athena Pinnacle Awards to Honor Executives, Corporations and Educators Working to Promote Women Leaders 2
... , Abstract ... technologies enable expression array analysis from extremely limited cell mass. ... amplification protocols, and novel quality assurance checks is used in ... with confidence. This application note provides a workflow for laser-cut ...
... Key words: LEADseeker • ... , The ... detects and quantitates light from a range of radiometric, luminescence, and fluorescence ... the combination of format-free imaging (fluorescence assays can be read in as ...
... , ... receptor binding assay • LEADseeker • SPA Imaging ... In mammals, serotonin (5-hydroxytryptamine, 5-HT) is a regulator of ... <P ,>The serotonin 5-HT 2C receptor is a subtype of ...
Cached Biology Technology:Microgenomic Expression Profiling 2Microgenomic Expression Profiling 3Microgenomic Expression Profiling 4Microgenomic Expression Profiling 5Microgenomic Expression Profiling 6Microgenomic Expression Profiling 7Integration of the LEADseeker Multimodality Imaging System with automated plate loading and incubation using Overlord Instrument software 2Integration of the LEADseeker Multimodality Imaging System with automated plate loading and incubation using Overlord Instrument software 3Integration of the LEADseeker Multimodality Imaging System with automated plate loading and incubation using Overlord Instrument software 4The development of a serotonin 5-HT2C receptor-binding assay using the LEADseeker Multimodality Imaging System 2The development of a serotonin 5-HT2C receptor-binding assay using the LEADseeker Multimodality Imaging System 3The development of a serotonin 5-HT2C receptor-binding assay using the LEADseeker Multimodality Imaging System 4
The Protein Kinase Factsbooks (2 Volume Set)...
All serum is collected from U.S.D.A. fryers and broilers. Pricing: $15/unit for 1 - 10 units; $12/unit for 11 - 50 units...
Whole blood is collected from healthy pigs (mixed breed, either sex) at the time of slaughter, refrigerated within 6 hours, processed within 24 hours and frozen at -20ºC....
Human/Mouse/Rat Keap1 MAb (Clone 333116) Protein Family: Transcription Factor Regulators...
Biology Products: