Navigation Links
Ecotoxicity: All clear for silver nanoparticles?
Date:2/25/2014

ed changes in the activity of about 1000 other genes and proteins, which they interpreted as a response to the stressor an attempt to repair silver-induced damage. At low concentrations, the cells' photosynthesis apparatus recovered within five hours, and recovery mechanisms were sufficient to deal with all but the highest concentrations tested.

A number of unanswered questions

At first glance, the results are reassuring because the silver concentrations that the algae are subject to in the environment are rarely as high as those applied in the lab, which allows them to recover quickly at least externally. But the experiments also showed that even low silver concentrations have a significant effect on intracellular processes and that the algae divert their energy to repairing damage incurred. This can pose a problem when other stressors act in parallel, such as increased UV-radiation or other chemical compounds. Moreover, it remains unknown to this day whether the cells have an active mechanism to shuttle out the silver. Lacking such a mechanism, the silver could have adverse effects on higher organisms, given that algae are at the bottom of the food chain.


'/>"/>

Contact: Dr. Kristin Schirmer
kristin.schirmer@eawag.ch
Ecole Polytechnique Fdrale de Lausanne
Source:Eurekalert

Page: 1 2

Related biology news :

1. Sequencing hundreds of nuclear genes in the sunflower family now possible
2. Conserved nuclear envelope protein uses a shuttle service to travel between job sites
3. American Chemical Society podcast: Detecting radioactive material in nuclear waste water
4. Bone marrow mononuclear stem cells show no new gains in heart function says TIME study
5. Improving detection of radioactive material in nuclear waste water
6. Volume of nuclear waste could be reduced by 90 percent, says new research
7. Super-thin membranes clear the way for chip-sized pumps
8. Microfluidic platform gives a clear look at a crucial step in cancer metastasis
9. Chair Mats of Glass Company Clearly Innovative Announces the Launch of 20 New Dealers in the Midwest
10. Researchers reveal the clearest new pictures of immune cells
11. Less haze in Singapore as the cause becomes clearer and more complex
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/22/2015)... YORK , Jan. 22, 2015   EyeLock, Inc. , ... it has appointed Steve Gerber to the new ... will be responsible for leading development of mobile platforms and ... years of success and innovation in the semiconductor industry to ...
(Date:12/22/2014)... 22, 2014 Research and Markets ( ... "The Global Watermarking and Fingerprinting Markets" ... http://photos.prnewswire.com/prnh/20130307/600769 This insight provides ... and fingerprinting markets. Watermarking aims to control and ...
(Date:12/19/2014)...  23andMe, Inc., the leading personal genetics company, today announced the ... ancestry of individuals from across the United States ... four hundred years ago, the United States ... different continents. This study illuminates how American history and the ...
Breaking Biology News(10 mins):EyeLock Names Steve Gerber as Senior Vice President of Mobile and Wearables 2The Global Watermarking and Fingerprinting Markets 223andMe Study Sketches Genetic Portrait of the United States 223andMe Study Sketches Genetic Portrait of the United States 323andMe Study Sketches Genetic Portrait of the United States 4
... UT Southwestern neuroscience researchers have identified a gene that controls ... mice often used to study addiction and behavior patterns. ... , determines how mammals respond to cocaine, although it is ... or for addiction, said Dr. Joseph Takahashi , chair ...
... Department of Energy,s Brookhaven National Laboratory have identified a ... class of plant products with a wide range of ... source of flavors, fragrances, and pigments; some are of ... contribution to the construction of plant cell walls, (poly)phenols ...
... of superstars in the materials world. Already prized for ... identity, vanadium dioxide can now add muscle power to ... Department of Energy (DOE),s Lawrence Berkeley National Laboratory (Berkeley ... from vanadium dioxide that for its size is a ...
Cached Biology News:UT Southwestern neuroscience researchers identify gene involved in response to cocaine 2Enlisting cells' protein recycling machinery to regulate plant products 2A micro-muscular breakthrough 2A micro-muscular breakthrough 3
(Date:1/22/2015)... Protocol Networks brings independent technology consulting to the ... consultants, Protocol Networks has recently announced its expansion into ... his company has attracted several clients in The Constitution ... as others. With the success of these engagements, Rogers ...
(Date:1/22/2015)... 22, 2015 Controlled Substance Compliance Services ... helps companies check the legal requirements around using controlled ... China. , As their international operations expand and ... software solutions built as a result of the first ...
(Date:1/22/2015)... Medical Systems (NYSE: VAR ), world leader in ... to sustainability with inclusion on a prestigious list of the ... equipment company among the Corporate Knights Global 100 Most Sustainable ... Davos, Switzerland . "We ...
(Date:12/24/2014)... and NEW YORK , Dec. 24, 2014 ... advancing patient care in critical areas, announced the closing of ... and warrants to purchase up to an aggregate 3,500,000 shares ... share and $.01 per warrant.  The warrants have a per ...
Breaking Biology Technology:Protocol Networks Brings Independent Technology Consulting to the Constitution State 2Global Compliance Service for Controlled Substances to Expand to China 2Varian Honored Among World's 100 Most Sustainable Corporations 2PlasmaTech Biopharmaceuticals, Inc. Announces Closing of Public Offering 2PlasmaTech Biopharmaceuticals, Inc. Announces Closing of Public Offering 3
... Approval of Genasense in Relapsed/Refractory Patients, BERKELEY ... GNTA ) announced that the Company has completed ... Janet Woodcock, Acting,Director of the Center for Drug ... Administration (FDA). The appeal asks that CDER approve ...
... Cell,Genesys, Inc. (Nasdaq: CEGE ), today announced ... and Sharon E. Tetlow, senior,vice president and chief financial ... to the company,s third quarter financial results,that will be ... at 2:00 p.m. PT/ 5:00 p.m. ET. The ...
... Include World-Renowned RNase and RNA Researchers, SOMERSET, ... of ribonuclease (RNase) therapeutics will be the focus ... by Alfacell,Corporation (Nasdaq: ACEL ). Moderated ... officer, and David Sidransky, M.D., Alfacell,s scientific,advisory board ...
Cached Biology Technology:Genta Completes Appeal of FDA Decision for Genasense(R) in CLL 2Genta Completes Appeal of FDA Decision for Genasense(R) in CLL 3Genta Completes Appeal of FDA Decision for Genasense(R) in CLL 4Genta Completes Appeal of FDA Decision for Genasense(R) in CLL 5Cell Genesys to Webcast Third Quarter 2007 Conference Call 2Alfacell to Host Webinar on RNA Interference-Like Mechanics of RNase Therapeutics on Nov. 29 2Alfacell to Host Webinar on RNA Interference-Like Mechanics of RNase Therapeutics on Nov. 29 3Alfacell to Host Webinar on RNA Interference-Like Mechanics of RNase Therapeutics on Nov. 29 4
... The wide mini ReadySub-Cell GT cell and PowerPac ... gel electrophoresis of nucleic acids in agarose gels. ... tank, lid with cables and electrodes, and leveling ... 220-240 V, provides output of 10-300 V, 4-400 ...
... Simplify the process and you reduce ... built into the CEQ 8000. Developed using ... and leadership in capillary electrophoresis technology, the ... analysis system. This system automatically fills the ...
... Capillary Electrophoresis System uses revolutionary technology ... (SPE), urine protein electrophoresis and immunofixation/subtraction ... analysis. The system is truly automated, ... no staining to process patient samples. ...
The filter 695RDF55 Reflect 635 for the Molecular Imager FX is a band pass filter for Cy5 and Alexa Fluor 635 dyes....
Biology Products: