Nanotechnology Now

Our NanoNews Digest Sponsors







Heifer International

Wikipedia Affiliate Button


Home > Press > New biosensor monitors water quality

A fabricated electrode with a grown MWCNT array (CNT post fabricated at the UC Nanoworld Lab).
A fabricated electrode with a grown MWCNT array

(CNT post fabricated at the UC Nanoworld Lab).

Abstract:
Cyanobacterial harmful algal blooms frequently occur in drinking water sources around the world due to eutrophication as a result of antrophogenic activities. Their presence in water is a potential threat because some species of cyanobacteria can produce and release potent toxic compounds (cyanotoxins), such as hepatotoxins, neurotoxins, and dermatotoxins.

New biosensor monitors water quality

Germany | Posted on January 9th, 2013

Among hepatotoxins, microcystins (MCs) are the most frequently reported cyanotoxins and MC-LR is the most commonly occurring congener of MCs worldwide as well as in the USA. The World Health Organization (WHO) has proposed a provisional concentration limit of MC-LR in drinking water of 1 μg L-1. Therefore, there is a need for techniques to monitor MC-LR in various sources of water.

Recently, Prof. Dionysiou's group at the University of Cincinnati (UC) in the USA and his collaborators (UC and USEPA, Cincinnati, USA; and NCSR Demokritos, Athens, Greece) developed a multi-walled carbon nanotube (MWCNT)-based electrochemical biosensor to monitor MC-LR in sources of drinking water supplies.

They reported the formation of oxygen-containing functional groups on the MWCNT surface following electrochemical functionalization in alkaline solution. The performance of the MWCNT array biosensor demonstrated a marked increase of the electron-transfer resistance upon antibody conjugation. The biosensor's electron-transfer resistance showed a linear dependence on the MC-LR concentration ranging from 0.05 to 20 μg L-1. The sensing performance of the biosensor at low MC-LR concentration allows monitoring of this cyanotoxin well below the drinking water provisional concentration limit of 1 μg L-1.

####

For more information, please click here

Copyright © Wiley-VCH Materials Science Journals

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

Link to the original paper on Wiley Online Library:

Related News Press

News and information

Nanoparticle Harnesses Powerful Radiation Therapy for Cancer May 20th, 2013

Microneedle-Delivered Nanoparticles Boost Antitumor Vaccines May 20th, 2013

Competition in the Quantum World May 20th, 2013

Elsevier Business Intelligence (EBI) to Host 'IN3 Medical Device 360 Boston,' June 24-26, 2013 May 20th, 2013

Nanotubes/Buckyballs

UC Riverside scientists discovering new uses for tiny carbon nanotubes: Adding ionic liquid to nanotube films could build smaller gadgets, and create more cost effective 'Smart Windows' that darken in bright sun May 15th, 2013

Development know-how is made available to collaboration partners: Bayer MaterialScience brings nano projects to a close May 8th, 2013

Next-generation transistor outperforms other carbon-based designs May 7th, 2013

Ubiquitous engineered nanomaterials cause lung inflammation, study finds: Substances are used in everything from paint to sporting equipment May 6th, 2013

Discoveries

Nanoparticle Delivers Large Protein Complex to Cancer Cell Nucleus May 20th, 2013

Protein 'Passport' Helps Nanoparticles Get Past Immune System May 20th, 2013

Nanoparticle Harnesses Powerful Radiation Therapy for Cancer May 20th, 2013

Microneedle-Delivered Nanoparticles Boost Antitumor Vaccines May 20th, 2013

Announcements

Competition in the Quantum World May 20th, 2013

Elsevier Business Intelligence (EBI) to Host 'IN3 Medical Device 360 Boston,' June 24-26, 2013 May 20th, 2013

Penn engineers' nanoantennas improve infrared sensing May 20th, 2013

Researchers Perform Fastest Measurements Ever Made of Ion Channel Proteins May 20th, 2013

Water

New Stanford Nanoscavengers Could Usher In Next Generation Water Purification May 15th, 2013

The University of Wyoming uses Nanoparticle Tracking Analysis to characterize nanoparticles in natural environments May 14th, 2013

Nanostart-holding New Asia Investments invests in breakthrough water projects May 13th, 2013

Columbia Engineers Manipulate a Buckyball by Inserting a Single Water Molecule: Nanoscale Technology Used to Drive a “Big" C60 through a "Small" H2O May Help Drug Delivery May 6th, 2013

NanoNews-Digest
The latest news from around the world, FREE





  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More












ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project








abbigliamento uomo
Computer Accessories
© Copyright 1999-2013 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE