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:7/22/2014)... promise for treating damaged organs and tissues, but with ... their effectiveness. New methods are being developed and tested ... after transplantation, as described in a Review article in ... Mary Ann Liebert, Inc., publishers. The article is available ... website . , In the article ,Preconditioning ...
(Date:7/22/2014)... Cambridge, MA and Shenzhen, China July 22, ... Tech), a subsidiary of BGI, the world,s largest ... a new human whole exome sequencing service based ... service includes in-depth bioinformatics analysis and SNP validation, ... 31, 2014. , Complete Genomics, highly regarded ...
(Date:7/22/2014)... a place emerging as a world-famous vacation spot with natural ... on the island. The Korea Institute of Geoscience and Mineral ... that a recent volcanic eruption was evident 5,000 years ago. ... date when lava spewed out of a volcano 5,000 years ... as the one the whole peninsula. , The research team ...
Breaking Biology News(10 mins):BGI Tech launches human whole exome sequencing service on complete genomics' advanced platform 2Jeju Island is a live volcano 2
... case state-of-the-art energy efficient housing will be officially opened ... Nottingham. The house built by BASF, a major ... part of the Creative Energy Homes Project on University ... of Built Environment to stimulate sustainable design ideas and ...
... Heritage Foundation (CHF) announced that Leroy Hood ... Award. Jointly sponsored by the Pittsburgh Conference ... and CHF, this award recognizes outstanding individuals ... community, inspired achievement, promoted public understanding of ...
... Ala. The long-sought-after biological gateway that anthrax uses ... at the University of Alabama at Birmingham (UAB). ... a receptor that sits on the surface of certain ... exactly how the bacteria get inside cells to begin ...
Cached Biology News:Opening day for a home of the future 2Opening day for a home of the future 3Leroy Hood to receive 2008 Pittcon Heritage Award 2Leroy Hood to receive 2008 Pittcon Heritage Award 3Anthrax cellular entry point uncovered 2
(Date:7/22/2014)... Institute of Standards and Technology (NIST) and California ... design for an atomic clock that is based ... , The microcomb clock, featured on the cover ... Optica ,* is the first demonstration of ... conversion of optical frequencies to lower microwave frequencies. ...
(Date:7/22/2014)... 2014 CTD Holdings, Inc. (OTCQB:CTDH), a ... device, cosmetics, and other markets, announced today that it ... of qualified private investors led by Novit L.P., an ... The transaction involved the signing of a Securities Purchase ... Common Stock at a price per share of $1.00, ...
(Date:7/22/2014)... July 22, 2014 OHAUS Corporation, ... and mechanical balances and scales, proudly announces its ... won Laboratory Equipment magazine’s 2014 “Readers' Choice” Award ... consecutive year the Explorer was voted the best ... Readers’ Choice Awards celebrates “excellence in product design ...
(Date:7/22/2014)... Mass. and SHENZHEN, China ... Tech Solutions Co., LTD, (BGI Tech), a subsidiary ... today the global launch of a new human ... industry-leading platform. This newly offered service includes in-depth ... at reduced prices until December 31, 2014. ...
Breaking Biology Technology:'Comb on a chip' powers new NIST/Caltech atomic clock design 2CTD Holdings Closes $1.725 Million Private Placement 2CTD Holdings Closes $1.725 Million Private Placement 3OHAUS Explorer Voted “Best Balance” in Laboratory Equipment’s 2014 Readers’ Choice Awards 2BGI Tech Launches Human Whole Exome Sequencing Service on Complete Genomics' Advanced Platform 2BGI Tech Launches Human Whole Exome Sequencing Service on Complete Genomics' Advanced Platform 3
... Jan. 30 Monogram,Biosciences, Inc., (Nasdaq: MGRM ) ... February 7, 2008 at 4:30 p.m. (Eastern Time) to ... outlook for 2008.,The call will be hosted by Mr. ... participate in the live teleconference, please call (877) 545-1409,or ...
... Helix BioPharma Corp. (TSX: HBP / Frankfurt: WKN ... Helix BioPharma Corp.,announces that at the Company,s Annual ... all of the resolutions presented by,management, appointing KPMG ... Cawkell, Jack Kay, Slawomir Majewski, and Gordon Lickrish ...
... 30 In a letter to,Governor Jennifer Granholm ... the Governor,s State of the State Address,wherein she ... MichBio is the,statewide association for Michigan,s life sciences ... of the legislature, to diversify,the state,s economy by ...
Cached Biology Technology:Monogram Biosciences Announces Fourth Quarter 2007 Financial Results Conference Call 2Helix BioPharma shareholders vote in favour of management 2MichBio Responds to Governor's Plan to Repeal Tort Reform Laws 2
...
Mynox is intended for research use only. Mynox is used for the elimination of Mycoplasma and Acholeplasma in cell and virus cultures, and other biologicals....
... Acridinium NHS ester can be ... nucleic acids. The covalently bound ... chemiluminescence in the presence of ... proteins can be used as ...
... The electrophoretic mobility shift assay (EMSA) is ... Often referred to as gel shift or ... the principle that when subjected to electrophoresis, ... DNA-protein complex. The Pierce LightShift Chemiluminescent EMSA ...
Biology Products: