Navigation Links
Too much technology may be killing beneficial bacteria
Date:4/29/2008

COLUMBIA, Mo. Too much of a good thing could be harmful to the environment. For years, scientists have known about silvers ability to kill harmful bacteria and, recently, have used this knowledge to create consumer products containing silver nanoparticles. Now, a University of Missouri researcher has found that silver nanoparticles also may destroy benign bacteria that are used to remove ammonia from wastewater treatment systems. The study was funded by a grant from the National Science Foundation.

Several products containing silver nanoparticles already are on the market, including socks containing silver nanoparticles designed to inhibit odor-causing bacteria and high-tech, energy-efficient washing machines that disinfect clothes by generating the tiny particles. The positive effects of that technology may be overshadowed by the potential negative environmental impact.

Because of the increasing use of silver nanoparticles in consumer products, the risk that this material will be released into sewage lines, wastewater treatment facilities, and, eventually, to rivers, streams and lakes is of concern, said Zhiqiang Hu, assistant professor of civil and environmental engineering in MUs College of Engineering. We found that silver nanoparticles are extremely toxic. The nanoparticles destroy the benign species of bacteria that are used for wastewater treatment. It basically halts the reproduction activity of the good bacteria.

Hu said silver nanoparticles generate more unique chemicals, known as highly reactive oxygen species, than do larger forms of silver. These oxygen species chemicals likely inhibit bacterial growth. For example, the use of wastewater treatment sludge as land-application fertilizer is a common practice, according to Hu. If high levels of silver nanoparticles are present in the sludge, soil used to grow food crops may be harmed.

Hu is launching a second study to determine the levels at which the presence of s
'/>"/>

Contact: Bryan E. Jones
jonesbry@missouri.edu
573-882-9144
University of Missouri-Columbia
Source:Eurekalert

Page: 1 2

Related biology news :

1. Yale scientists use nanotechnology to fight E. coli
2. Voice Biometrics Gains Traction as Most Accurate and Convenient Technology to Secure Customer Privacy
3. M2SYS Partners with SecuGen Corporation to Support Market Leading Hamster Plus Fingerprint Reader with Auto-On Technology
4. Silicon Valley Technology Leaders LaserCard Corporation and Tesla Motors Sign LaserPass Secure Access Deal
5. Nanotechnology: Whats that?
6. UCs NIH grant brings technology from outer space to playgrounds
7. BIO-key(R) International to Showcase Deployed Biometric Security Applications at 2007 Biometric Technology Expo
8. Cogent Systems and Northrop Grumman Reach Agreement to Settle Automated Fingerprint Identification Technology Suit and Create Strategic Alliance
9. UCLA/VA partners with ASU to advance biosensor technology for urinary tract infections
10. Herr receives Heinz Award for Technology, the Economy and Employment
11. Singapore National Science and Technology Awards
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/29/2014)... is available in German . ... between organisms is considered the oldest form of communication. ... conspecifics, for example, the sexual attraction between males and ... and to coordinate reproductive behavior in males and females. ... of the Algarve in Faro, Portugal, and at the ...
(Date:8/29/2014)... a cell,s nucleus, chromosomal DNA is tightly bound ... biologists call chromatin. Until about two decades ago, ... mere packing material around which the glamorous DNA ... a greater appreciation for how DNA/histone interactions govern ... research institutions studying the sequence of the genome ...
(Date:8/29/2014)... USA - The rise of the Tibetan plateau -- ... -- is important for both its profound effect on ... study published in GSA Bulletin , Katharine Huntington ... isotope thermometry -- using modern and fossil snail shells ... in southwestern Tibet. , Views range widely on ...
Breaking Biology News(10 mins):Ready for mating at the right time 2Ready for mating at the right time 3'K-to-M' histone mutations: How repressing the repressors may drive tissue-specific cancers 2'K-to-M' histone mutations: How repressing the repressors may drive tissue-specific cancers 3Snails tell of the rise and fall of the Tibetan Plateau 2Snails tell of the rise and fall of the Tibetan Plateau 3Snails tell of the rise and fall of the Tibetan Plateau 4Snails tell of the rise and fall of the Tibetan Plateau 5Snails tell of the rise and fall of the Tibetan Plateau 6Snails tell of the rise and fall of the Tibetan Plateau 7
... ARLINGTON, Va. - Aiming to motivate researchers to help ... Office of Naval Research (ONR) announced nine winners of an ... Forum. The recipients, whose projects range from microbial to ... their research area, said Dr. Rich Carlin, who heads ONR,s ...
... Researchers at the University of Illinois have developed a ... greenhouse gas emissions that results from changes in land ... Global Change Biology , takes into account many ... There is an urgent need to accurately ...
... led by Queen,s University biologists has found that potent ... feeding in the ocean, end up in the sediment ... diets will funnel different ,cocktails, of metal contaminants from ... affect other living organisms," says lead author Neal Michelutti, ...
Cached Biology News:Winners of ONR's Energy Challenge to help Navy reduce its carbon footprint 2Researchers calculate the greenhouse gas value of ecosystems 2Researchers calculate the greenhouse gas value of ecosystems 3Coastal birds carry toxic ocean metals inland 2
(Date:8/28/2014)... in spintronics, an electronic which is not only ... on their spin and the spin-related magnetism. Spin-charge ... signals and vice versa. Recently, the research group ... Physics at Johannes Gutenberg University Mainz in collaboration ... has for the first time realised a new, ...
(Date:8/28/2014)... , Aug. 28, 2014   SunTrust Robinson Humphrey ... industry veterans to its equity research team in ... ongoing expansion in equity research demonstrates our commitment ... insights to enhance their investment decision making," said ... STRH.  "We continue to make significant investments in ...
(Date:8/28/2014)... 2014 Scientists, researchers, and technologists will ... Laser Damage 2014 symposium. Marking its 46th year, ... will run 14-17 September. The event is sponsored by ... . , The premier conference for basic and applied ... optical materials will engage researchers and engineers from numerous ...
(Date:8/28/2014)... August 28, 2014 Supplementing their ... a promotion for Eppendorf Safe Lock Centrifuge ... purchase the highest quality tubes at an affordable ... for customers doing chemical, medical, pharmaceutical, and life ... are not regularly able to afford Eppendorf products. ...
Breaking Biology Technology:A new, tunable device for spintronics 2A new, tunable device for spintronics 3SunTrust Robinson Humphrey Expands Equity Research in Healthcare and Energy 2SunTrust Robinson Humphrey Expands Equity Research in Healthcare and Energy 3Laser Damage to Draw Researchers, Engineers, Scientists to 46th Annual Conference 2Laser Damage to Draw Researchers, Engineers, Scientists to 46th Annual Conference 3Eppendorf Safe Lock Centrifuge Tube Promotion Now Available at Major Pipette Distributor Pipette.com 2Eppendorf Safe Lock Centrifuge Tube Promotion Now Available at Major Pipette Distributor Pipette.com 3
... BD (Becton, Dickinson and Company) (NYSE: BDX ... its third fiscal quarter 2009 earnings conference call on Thursday, July ... press release detailing the quarter,s earnings earlier that morning. , ... will be accessible through BD,s website at www.bd.com/investors ...
... Kendle (Nasdaq: KNDL ), a leading, global ... Jarrod Pontius to the position of Chief Legal Officer. ... for all legal services, corporate governance and general corporate ... in Kendle,s global headquarters in Cincinnati and will report ...
... New Sequence Data into Biochips for Gene Expression Profiling ... , LEXINGTON, Mass. and HEIDELBERG, Germany, June 29 ... today the launch of the first biochip on the ... biochip from febit enables up-to-date profiling and enrichment of ...
Cached Biology Technology:Kendle Names Jarrod Pontius Chief Legal Officer 2febit First to Offer Newly Published Mouse Genome on a Chip for DNA/RNA Detection and Enrichment 2febit First to Offer Newly Published Mouse Genome on a Chip for DNA/RNA Detection and Enrichment 3
... Kit with CyScribe GFX Purification Kit, ... purification of Cy3- and Cy5-labeled cDNA.Optimized ... cDNA labeling and purification.Flexible and optimized ... labeling reactions with either Cy3- or ...
... ISO 9001:2000 Certified USDA Research Registered OLAW ... Training AALAS Certified Technicians ... GLP Documentation Upon Request Focus ... for all your custom immunology service needs. ...
Homo sapiens toll interacting protein Antigen: Recombinant Protein...
B3-1...
Biology Products: