HOME >> BIOLOGY >> NEWS
More nutritious, less toxic

HANOVER, NHResearch led by Dartmouth scientists found that animals fed nutritious, high-quality food end up with much lower concentrations of toxic methylmercury in their tissues. The result suggests ways in which methylmercurya neurotoxin that can accumulate to hazardous levelscan be slowed in its passage up the food chain to fish.

"This research provides evidence that by eating high-quality food, organisms may reduce their bodily concentration of a contaminant," said lead author Roxanne Karimi, a graduate student in the Dartmouth Department of Biological Sciences. "These findings allow us to predict the conditions under which freshwater fish are likely to carry relatively high mercury levels."

The research is reported in a paper titled "Stoichiometric controls of mercury dilution by growth," to published in the April 23, 2007 online "Early Edition" of Proceedings of the National Academy of Sciences (http://www.pnas.org/cgi/content/abstract/0611261104v1).

In laboratory experiments, Karimi and colleagues from Dartmouth, Lakeland College, and Stony Brook University, studied the translucent water flea Daphnia pulex, a species of zooplankton that is one of the chief food sources for freshwater fish. The team measured, over five days, the growth of two groups of juvenile Daphnia, which in their mature state are about 2-3 millimeters in length. Both groups were fed the same amount of algae contaminated with trace amounts of methylmercury; however, one group's algae was of greater nutritional value.

The animals that received the nutritious, phosphorous-rich algae grew 3.5 times faster than the other group, the research found. Although the faster growing zooplankton ingested roughly the same amount of methylmercury as the other group, they ended up with one-third the concentration of toxin in their tissues because, as they grew faster, the toxin was diluted. <
'"/>

Contact: Rebecca Bailey
Rebecca.A.Bailey@dartmouth.edu
603-646-2117
Dartmouth College
23-Apr-2007


Page: 1 2 3

Related biology news :

1. Helping chlorine-eating bacteria clean up toxic waste
2. U of M researchers find new, more effective treatment for toxic shock syndrome
3. Inherited genes linked to toxicity of leukemia therapy
4. Prenatal toxicity linked to immune dysfunctions in later life
5. Widely used iron nanoparticles exhibit toxic effects on neuronal cells
6. Nonvenomous Asian snakes borrow defensive poison from toxic toads
7. Hidden-hero microbes in soil, water may help naturally clean toxic sites
8. New study shows promise of toxicogenomics in environmental monitoring
9. Preventing graft-versus-host disease disease after bone marrow transplant -- without toxicity
10. Chemotherapy can be more toxic to brain cells than to cancer cells and may cause brain damage
11. Towards predicting late-stage radiation toxicity

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:8/1/2018)... ... ... Visikol CEO Dr. Michael Johnson has announced that through the rapid adoption ... far exceed its original 2018 revenue projections. , Over the last two years, ... tools, whole mount imaging techniques and advanced 3D cell culture assays ...
(Date:7/31/2018)... ... 31, 2018 , ... Lifecycle Biotechnologies, a leading life science ... this role, Mr. Muzek will lead the company-wide industrial strategic business development efforts ... , With over 20 years in business development, Mr. Muzek previously served as ...
(Date:7/29/2018)... (PRWEB) , ... July 29, 2018 , ... Dr. William ... biofield energy treated nutraceutical to improve overall immunity and to combat inflammation and autoimmune ... well as inflammation. The following data was reported:, Up ...
Breaking Biology News(10 mins):
(Date:10/12/2017)... ... October 12, 2017 , ... ... of a complex biological network, a depiction of a system of linkages and ... Dmitry Korkin, PhD, associate professor of computer science at Worcester Polytechnic Institute (WPI) ...
(Date:10/12/2017)... ... October 12, 2017 , ... DuPont ... today that they have entered into a multiyear collaboration to identify and characterize ... with additional tools for gene editing across all applications. , Under the terms ...
(Date:10/12/2017)... ... October 12, 2017 , ... BioMedGPS announces expanded coverage of ... newest module, US Hemostats & Sealants. , SmartTRAK’s US Market for Hemostats and ... synthetic sealants and biologic sealants used in surgical applications. BioMedGPS estimates the market ...
(Date:10/12/2017)... ... October 12, 2017 , ... ... platform specifically designed for life science researchers to analyze and interpret datasets, ... Franklin, who made a major contribution to the discovery of the double-helix ...
Breaking Biology Technology:
Cached News: