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:5/8/2019)... , ... May 08, 2019 , ... ... has successfully leveraged the support services provided by Medrio , the leading ... clinical trial sponsor agreement. , By collaborating to position high-quality CRO services ...
(Date:5/7/2019)... ... May 07, 2019 , ... AMGtime ... Convention and Entertainment Center from May 15- 17. At booth #226, AMGtime will ... include flexible software, biometric hardware, mobile apps, specialized industry solutions, advanced add-on modules, ...
(Date:5/2/2019)... ... 01, 2019 , ... uBiome, the leader in microbial genomics, ... General Counsel, as Interim Chief Executive Officer of uBiome, effective immediately. The Company’s ... There will also be an independent investigation into uBiome’s billing practices to be ...
Breaking Biology News(10 mins):
(Date:4/9/2019)... ... 09, 2019 , ... Sonny Bar Lisa, or Sonny for short, is a ... After a series of diagnostics, an MRI was performed which revealed Sonny had ... injury and found that VetStem Regenerative Cell Therapy may be a treatment ...
(Date:4/8/2019)... ... April 08, 2019 , ... ... solutions, announced today the launch of their app integration solution, CT Cloud Unite. ... and contact-orientated applications while using CT Cloud Voice and Skype for Business solutions. ...
(Date:4/8/2019)... ... April 09, 2019 , ... To ... research center Chan Zuckerberg Biohub (CZ Biohub) has chosen Geneious Biologics to help ... part of CZ Biohub’s efforts to establish new approaches to inform the discovery ...
(Date:4/4/2019)... ... April 03, 2019 , ... LeadingBiotech, an exclusive ... dialogue, today announces its Boston CEO conference to be held May 28-29, 2019 ... and opportunities with high-level panels and discussions from past, present and future change-makers. ...
Breaking Biology Technology:
Cached News: