Navigation Links
Dental chair a possible source of neurotoxic mercury waste
Date:3/26/2008

Mercury is a large component of dental fillings, but it is not believed to pose immediate health risks in that form. When exposed to sulfate-reducing bacteria, however, mercury undergoes a chemical change and becomes methylated, making it a potent, ingestible neurotoxin.

While the major source of neurotoxic mercury comes from coal-fired electric power plants, researchers at the University of Illinois at Chicago and at Urbana-Champaign say mercury entering drain water from dental clinics and offices is also a source.

"We found the highest levels of methyl mercury ever reported in any environmental water sample," said Karl Rockne, associate professor of environmental engineering at UIC and corresponding author of the study that appeared online March 12 in the journal Environmental Science and Technology.

Working with James Drummond, UIC professor of restorative dentistry, Rockne gathered waste water samples in collection tanks generated from both a single-chair dentist's office and a 12-chair dental clinic to check for methyl mercury.

Water collected was allowed to settle. Clear layers above the settled particles were then analyzed for presence of methyl mercury. Fine, slow-settling particles of mercury get into the waste water mostly after dentists use high-speed drills to remove old amalgam fillings. The numerous fine particles the drilling produces provide an ample source of exposed mercury surfaces, making them prime targets for sulfur-reducing bacteria that commonly live in anaerobic conditions and are known to methylate mercury.

"It appears to be produced partially, if not fully in the waste water, and it's being produced very rapidly," said Rockne, adding that it was significant this was happening before the particles were getting into sewers, where sulfur-reducing bacteria thrive.

The finding raised the question whether the culprit bacteria were living in the mouths of dental patients. "We don't have
'/>"/>

Contact: Paul Francuch
francuch@uic.edu
312-996-3457
University of Illinois at Chicago
Source:Eurekalert

Page: 1 2

Related biology news :

1. Small-scale fishing in Mexico rivals industrial fisheries in accidental turtle deaths
2. 12 McGill researchers awarded Canada Research Chairs
3. Motor neuron disease and toxic substances: Possible link?
4. Researchers reveal HIV peptides possible pathway into the cell
5. Study says 2000 tigers possible in Thailand
6. NIH selects LIAI for major study on allergy molecular causes and possible treatments
7. Study reveals a key to blood vessel growth and possible drug target
8. Study reveals possible genetic risk for fetal alcohol disorders
9. Study by Pittsburgh researchers identifies possible vaccine target for chlamydia
10. Possible hepatitis C vaccine
11. Key to using local resources for biomass may include waste
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/28/2014)... Earth that are high priorities for conservation in the ... as it has the lowest fraction of its land ... ,refugia, areas of biological diversity that support many ... times of great environmental change. The refugia that do ... , The biggest refugia are in the Amazon, ...
(Date:7/28/2014)... hunter, but the target of his work consists of ... special methods and instruments. Benjamin Hause, an assistant research ... Kansas State University, recently published an article about one ... important find in the United States. , "We had ... it was," Hause said. "We used next-generation sequencing to ...
(Date:7/28/2014)... found that 73 percent of adult survivors of childhood ... syndrome and related health problems by failing to follow ... issue of the journal Cancer . , Almost ... cancer in the study had metabolic syndrome, an umbrella ... abdominal obesity, elevated triglyceride and other abnormalities that often ...
Breaking Biology News(10 mins):Study finds Europe's habitat and wildlife is vulnerable to climate change 2Researcher using next-generation sequencing to rapidly identify pathogens 2Researcher using next-generation sequencing to rapidly identify pathogens 3Unhealthy habits more than double risk of metabolic syndrome in childhood cancer survivors 2Unhealthy habits more than double risk of metabolic syndrome in childhood cancer survivors 3
... lipid synthesis in the liver, UC Irvine endocrinologists have revealed ... With this finding, Dr. Ellis Levin and colleagues believe ... appear in the May 21 issue of the journal ... field for 50 years has been that only receptors located ...
... health, development, and academic success of children, schools should ... have opportunities to engage in at least 60 minutes ... a new report from the Institute of Medicine. ... children meet this evidence-based guideline for promoting better health ...
... (May 23, 2013) A new report from the ... pupils engage in at least 60 minutes of vigorous or ... than half of American youth meet current evidence-based guidelines of ... activity daily, according to the report, which was released today. ...
Cached Biology News:UCI study reveals new mechanism for estrogen suppression of liver lipid synthesis 2Schools should provide opportunities for 60 minutes of daily physical activity to all students 2Schools should provide opportunities for 60 minutes of daily physical activity to all students 3Schools should provide students with daily physical activity, IOM recommends 2
(Date:7/28/2014)... COLLEGE STATION, Texas , July 28, 2014 /PRNewswire/ ... will be a 177-key, 4-star boutique hotel in the heart ... , Texas.  Photo - http://photos.prnewswire.com/prnh/20140725/130455 ... the first hotel within ATLAS , The ... mixture of standard rooms and suites, a sleek restaurant and bar, ...
(Date:7/25/2014)... Albany, NY (PRWEB) July 26, 2014 ... Trials Review, H2, 2014" provides data on the ... This report provides elemental information and data relating ... Cerebral Stroke. , View full global Ischemic Stroke ... It includes an overview of the trial numbers ...
(Date:7/25/2014)... 25, 2014 Research and Markets ... Metabolomics Market 2014-2018" report to their offering. ... Metabolomics or Metabonomics is the scientific study ... a new experimental technique that is being widely ... Metabolites are small molecules that are present in ...
(Date:7/25/2014)... California (PRWEB) July 25, 2014 Lawrence ... named to Thomson Reuters list of " The World's ... are part of the 3,000 researchers who were identified ... to recognize those who published the highest-impact work (2002-2012 ... research papers on combustion modeling . , "This ...
Breaking Biology Technology:Texas' Biocorridor Announces the Atlas Hotel, Centerpiece of Mixed Use Community for Biotech Industry 2Texas' Biocorridor Announces the Atlas Hotel, Centerpiece of Mixed Use Community for Biotech Industry 3Texas' Biocorridor Announces the Atlas Hotel, Centerpiece of Mixed Use Community for Biotech Industry 4Ischemic Stroke and Cerebral Stroke Global Clinical Trials Review H2, 2014: MarketResearchReports.Biz 2Ischemic Stroke and Cerebral Stroke Global Clinical Trials Review H2, 2014: MarketResearchReports.Biz 3Global Metabolomics Market 2014-2018: Key Vendors are Agilent, Bio-Rad, Bruker, Human Metabolome and Metabolon 2Scientists Burst onto Influential List for Combustion Research 2Scientists Burst onto Influential List for Combustion Research 3Scientists Burst onto Influential List for Combustion Research 4
... Amylin Pharmaceuticals,Inc. (Nasdaq: AMLN ) will Webcast ... 2008 on Tuesday, October 21, 2008 at 5:00 p.m. ... Executive,Officer, will lead the call. On the same date ... of 2008., The call will be Webcast live ...
... Data Demonstrates 30% Reduction in Composite Events When Using Routine ... FFR Guidance in ... VOLC ) today announced the launch of the PrimeWire(TM) Pressure,Guidewire, ... s5 and,s5i imaging consoles in the U.S. The PrimeWire is ...
... Colo., Oct. 15 Bolder BioTechnology, Inc.,announced today ... Phase II Continuing,Renewal Small Business Innovation Research (SBIR) ... the National,Institute of Neurological Disorders and Stroke (NINDS) ... the entire grant award is contingent,upon the achievement ...
Cached Biology Technology:Amylin Pharmaceuticals to Webcast Third Quarter Results 2Volcano Corporation Announces Launch of PrimeWire(TM) Pressure Guidewire and s5-FFR Option for Existing Fleet of s5 IVUS Consoles 2Volcano Corporation Announces Launch of PrimeWire(TM) Pressure Guidewire and s5-FFR Option for Existing Fleet of s5 IVUS Consoles 3Volcano Corporation Announces Launch of PrimeWire(TM) Pressure Guidewire and s5-FFR Option for Existing Fleet of s5 IVUS Consoles 4Volcano Corporation Announces Launch of PrimeWire(TM) Pressure Guidewire and s5-FFR Option for Existing Fleet of s5 IVUS Consoles 5Bolder BioTechnology Receives $1.6 million NIH Grant to Continue Development of Multiple Sclerosis Drug 2
DryStrip aligners, 4. Category: Electrophoresis Systems & Standards & Reagents, IEF & SDS-PAGE & 2-D Electrophoresis, Multiphor II Kits & Components and Accessories....
...
... PGE1-d4 contains 4 deuterium atoms at ... It is intended for use as an ... by GC- or LC-mass spectrometry. PGE1 is ... (DGLA), but it is virtually undetectable in ...
Assay Diluent Trial Pack, 4 x 100 mL...
Biology Products: