Navigation Links
Biosensors to probe the metals menace
Date:8/29/2007

If the pond life goes star-shaped, you'd be wise not to drink the water.

Researchers from CRC CARE are pioneering a world-first technology to warn people if their local water or air is contaminated with dangerous levels of toxic heavy metals and metal-like substances.

Andrew McKay, a PhD student at CRC CARE and The University of Queensland, is studying the changes that take place in a unique water microbe when it is exposed to arsenic, cadmium and lead industrial and natural contaminants around the world.

Our goal is to develop a simple field test that can warn people or environmental authorities if dangerous levels of toxic metals or metalloids (metal-like substances such as arsenic) are present in the environment, to which they might be exposed, he explains.

The test could provide vital in helping to tackle one of the world's greatest disasters the poisoning of tens of millions of people in Bangladesh and West Bengal, India, through naturallyoccurring arsenic in their household well water.

But countries such as Australia and New Zealand also have an arsenic problem from the tens of thousands of old sheep and cattle dips where arsenic was used for decades to control pests," Mr McKay said.

"In many cases these old dip sites have been forgotten and spreading urbanization has covered them.

We also have numerous old gold mining sites where arsenic was once used, tailings dumps from almost any kind of metal mine and wetlands that were used to trap contaminated runoff.

Mr McKay said old factories which produced paint or batteries had left historical residues of lead in our inner city areas, while fertilizer plants and other industrial processes had deposited cadmium and other toxic metals.

If toxic metals are present in the soil there is always a risk they will leach into drinking water, get into our food chain and reach infants and children," he said.

As city land value increase due to demand, we need better ways to make sure the land is clean and safe to live and work on.

He said there was good progress in developing water organisms as an early warning tool for such contamination, especially where a mix of toxic contaminants is involved.

We've found a number of readily-observable changes which take place in the organism when it is exposed to increased levels of toxic metals and metalloids," he said.

"Their growth and reproduction rates slow down and their shape changes becoming star or V-shaped.

And of course, at high levels of the toxins, they die.

These changes will enable scientists to use the pond creatures as living sensors or biosensors for toxic metal contamination.

The current research challenge, he says, is to use the organisms to develop a sensitive enough test to discern whether or not the level of contamination poses a risk to human health and life.

Simple pond creatures are often more tolerant of metals than humans, who accumulate the toxins over a much longer period of time, leading to cancers, immune system breakdown, nerve or brain damage or other forms of poisoning.

The research task now is to equate the symptoms observed in the microbes with levels of risk to humans and animals, and to package this as a cheap, simple test that can provide a quick answer in the field rather than through long and expensive laboratory testing, Mr McKay said.


'/>"/>
Contact: Jan King
communications@uq.edu.au
61-733-651-120
Research Australia
Source:Eurekalert

Related medicine news :

1. New scalpel probes into cancer
2. The Bio-probe –“ Boon to women ?
3. Research Fraud By Doctor – Probe Demanded
4. Tamiflu Shortage Can Be Better Handled By Combining It With Probenecid
5. Three In One Ultrasound Probe For 3-D Imaging Of Heart And Tissue Destruction Developed
6. Panic and probe due to mysterious deaths
7. Gestiva – the pre-term birth drug probed by FD
8. Link between Old Cells and Ageing probed
9. China Launches Probe Into Breast Enhancement Drug
10. Cell Behavior Better Understood with Nano Probe
11. Madhya Pradesh Hospital to Probe Power Failure Deaths
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/25/2016)... ... , ... The temporary closing of Bruton Memorial Library on June 21 due to a possible ... often overlooked aspect of head lice: the parasite’s ability to live away from a human ... but a necessary one in the event that lice have simply gotten out of control. ...
(Date:6/25/2016)... ... June 25, 2016 , ... On Friday, June 10, Van Mitchell, Secretary ... Work award to iHire in recognition of their exemplary accomplishments in worksite health promotion. ... Maryland Workplace Health & Wellness Symposium at the BWI Marriott in Linthicum Heights. iHire ...
(Date:6/24/2016)... ... 2016 , ... Marcy was in a crisis. Her son James, eight, was out of control. ... and physically. , “When something upset him, he couldn’t control his emotions,” remembers Marcy. ... rocks at my other children and say he was going to kill them. If ...
(Date:6/24/2016)... ... 24, 2016 , ... Topical BioMedics, Inc, makers of Topricin and MyPainAway Pain Relief Products, join ... wage raise to $12 an hour by 2020 and then adjusting it yearly to increase ... of the minimum wage, assure the wage floor does not erode again, and make future ...
(Date:6/24/2016)... ... June 24, 2016 , ... Strategic Capital Partners, ... economy by obtaining investment capital for emerging technology companies. SCP has delivered ... already resulted in more than a million dollars of capital investment for five ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... Belgium , June 24, 2016 /PRNewswire/ ... announced the appointment of Dr. Edward Futcher ... a Non-Executive Director, effective June 23, 2016.Dr. Futcher ... and Nominations and Governance Committees.  As a non-executive ... provide independent expertise and strategic counsel to VolitionRx ...
(Date:6/23/2016)... , June 23, 2016  MedSource announced ... as its e-clinical software solution of choice.  This ... best possible value to their clients by offering ... The preferred relationship establishes nowEDC as the EDC ... for MedSource,s full-service clients.  "nowEDC has long been ...
(Date:6/23/2016)... 23, 2016 Any dentist who has made an ... current process. Many of them do not even offer this ... and high laboratory costs involved. And those who ARE able ... such a high cost that the majority of today,s patients ... Parsa Zadeh , founder of Dental Evolutions Inc. and ...
Breaking Medicine Technology: