Navigation Links
NIST technique controls sizes of nanoparticle clusters for EHS studies
Date:2/2/2011

The same properties that make engineered nanoparticles attractive for numerous applicationssmall as a virus, biologically and environmentally stabile, and water-solublealso cause concern about their long-term impacts on environmental health and safety (EHS). One particular characteristic, the tendency for nanoparticles to clump together in solution, is of great interest because the size of these clusters may be key to whether or not they are toxic to human cells. Researchers at the National Institute of Standards and Technology (NIST) have demonstrated for the first time a method for producing nanoparticle clusters in a variety of controlled sizes that are stable over time so that their effects on cells can be studied properly.*

In their tests, the NIST team made samples of gold, silver, cerium oxide and positively-charged polystyrene nanoparticles and suspended them separately in cell culture medium, allowing clumping to occur in each. They stopped the clumping by adding a protein, bovine serum albumin (BSA), to the mixtures. The longer the nanoparticles were allowed to clump together, the larger the size of the resulting cluster. For example, a range of clustering times using 23 nanometer silver nanoparticles produced a distribution of masses between 43 and 1,400 nanometers in diameter. Similar size distributions for the other three nanoparticle types were produced using this method.

The researchers learned that using the same "freezing times"the points at which BSA was added to halt the processyielded consistent size distributions for all four nanoparticle types. Additionally, all of the BSA-controlled dispersions remained stable for 2-3 days, which is sufficient for many toxicity studies.

Having successfully shown that they could control the production of nanoparticle clumps of different sizes, the researchers wanted next to prove that their creations could be put to work. Different-sized silver nanoparticle clusters were mixe
'/>"/>

Contact: Michael E. Newman
michael.newman@nist.gov
301-975-3025
National Institute of Standards and Technology (NIST)
Source:Eurekalert  

Page: 1 2

Related biology news :

1. New technique to see neurons of the deep brain for months at a time developed at Stanford
2. Technique allows researchers to identify key maize genes for increased yield
3. GEN co-sponsors roundtable discussion on novel bioremediation techniques
4. Quartz crystal microbalances enable new microscale analytic technique
5. New imaging technique accurately finds cancer cells, fast
6. New oyster farming technique increases productivity, offers entrepreneurial opportunities
7. Invention helps students learn surgical techniques before operating on patients
8. Radically simple technique developed to grow conducting polymer thin films
9. Optical technique reveals unnexpected complexity in mammalian olfactory coding
10. Technique to reattach teeth using stem cells developed at UIC
11. New oil detection technique
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
NIST technique controls sizes of nanoparticle clusters for EHS studies
(Date:5/7/2015)... Sweden , May 7, 2015 ... touch fingerprint sensors, FPC1022 and FPC1035, FPC,s smallest ... and FPC1035 are mainly considered for integration on ... size gives smartphone OEMs increased possibilities to integrate ... The decreased size also improves possibilities for module ...
(Date:4/27/2015)... Apr. 27, 2015 NXT-ID, Inc. (NASDAQ: ... company focused on the growing mobile commerce market, announces ... pre-order customers the first week of May, 2015 and ... of May. Gino Pereira , ... for the company as Wocket® enters the consumer market. ...
(Date:4/20/2015)... The announcement comes as demand for fire ... Ireland,s foremost records management company, has ... an impressive track record of clients within the first 12 ... management sector in Dubai . As a ... employ a further eight staff members at its Irish headquarters. ...
Breaking Biology News(10 mins):FPC Introduces its Smallest Touch Fingerprint Sensors to Date 2Wocket, the Smartest Wallet You Will Ever Own, Announces Shipment to Pre-order Customers 2Wocket, the Smartest Wallet You Will Ever Own, Announces Shipment to Pre-order Customers 3Glenbeigh Records Management Wins Contract With Dubai Islamic Bank 2Glenbeigh Records Management Wins Contract With Dubai Islamic Bank 3
... Socioeconomic position is a determinant of antiretroviral treatment effectiveness ... found even among subjects with high rates of drug ... 1 issue of the Journal of Psychosomatic Research. ... from Harvard School of Public Health (HSPH), Massachusetts General ...
... Virology of the GSF National Research Center for ... Research Centres) the group is continuing to search for ... of a prion infection. In collaboration with colleagues from ... Heidelberg, the group used micro-array technologies micro-arrays ...
... King Abdullah University of Science and Technology ... signed a Memorandum of Understanding on August 30, 2007, to ... positively impact the Kingdom of Saudi Arabia and the ... and Dr. David D. Arnold, president of AUC, signed ...
Cached Biology News:Socioeconomic position associated with effectiveness of HIV drugs 2Prions and retroviruses -- an unholy alliance? 2KAUST and American University in Cairo to collaborate on research and academic development 2
(Date:5/28/2015)... , May 28, 2015 /PRNewswire/ ... http://www.researchandmarkets.com/research/8h5hs2/animal ) has announced the addition ... Biotechnology - Technologies, Markets and Companies" ... , ,This report describes and evaluates ... veterinary medicine and pharmaceuticals as well ...
(Date:5/28/2015)... , May 27, 2015 Research and ... Jain PharmaBiotech,s new report "Cell Therapy - ... This report describes and evaluates cell ... to play an important role in the practice ... the old fashioned bone marrow transplants. Role of ...
(Date:5/28/2015)... -- Celsion Corporation (the "Company") (NASDAQ: CLSN ) ... institutional healthcare investors to purchase an aggregate of approximately ... at-the-market registered direct offering and a concurrent private placement ... Company entered into a definitive purchase agreement with these ... an aggregate of 3,000,000 shares of its common stock ...
(Date:5/28/2015)... May 28, 2015 BioNorth Texas ... and representing the life sciences industry in northern ... Directors meeting at The Foundry in Dallas on ... organization brought together a broad spectrum of biotech ... the organization's early successes in partnering with key ...
Breaking Biology Technology:Global Animal Biotechnology Report 2015 - Technologies, Markets and Companies Analysis to 2024 2Global Animal Biotechnology Report 2015 - Technologies, Markets and Companies Analysis to 2024 3Global Cell Therapy Market 2015-2020 - Technologies, Markets and Companies 2Celsion Corporation Announces $8 Million At-The-Market Registered Direct Offering 2Celsion Corporation Announces $8 Million At-The-Market Registered Direct Offering 3BioNorthTX Holds Inaugural Board of Directors Meeting 2BioNorthTX Holds Inaugural Board of Directors Meeting 3
... LLP Tech Top 40, EAST HARTFORD, Conn., June ... Top 40, a new awards program in,partnership with accounting ... growing technology companies in Connecticut. Companies will be,recognized on ... a first,year revenue requirement of $50,000 and minimum revenues ...
... Biovail CEO Refuses to Meet; Concerned Shareholders Believe It Reflects,Unwillingness To Confront ... ... Knowledge June 17 Conference Call with Analysts Available on BetterBiovail.com ... TORONTO, June 17 The Concerned Shareholders,of Biovail Corporation (NYSE: ...
... Integra Group of Brooklyn Park and, Nanocopoeia of ... path to ... BROOKLYN PARK, Minn. and SAN DIEGO, June 17 ... introduces the "Mouse Stent Model" for rapid screening of,new coronary ...
Cached Biology Technology:Connecticut Technology Council to Recognize Fast Growing Technology Companies 2Biovail Concerned Shareholders Want Open Debate 2Biovail Concerned Shareholders Want Open Debate 3NanoInterventions Launches New, Rapid Testing System for Coronary Stents 2NanoInterventions Launches New, Rapid Testing System for Coronary Stents 3
Duck polyclonal to Cobra venom - Fab Fragment ( Abpromise for all tested applications). Antigen: Snake Venom of N. naja arta...
Fas-ligand rabbit polyclonal antibody...
Reacts with the 80 kDa fragment of the M-chain of human merosin....
Goat polyclonal to Rabenosyn 5 ( Abpromise for all tested applications). Antigen: Synthetic peptide: ELKHTLAKQKGGTD, corresponding to C terminal amino acids 771-784 of Human Rabenosyn 5. Entr...
Biology Products: