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Author: Vytautas Reipa

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1. Probing the intracellular glutathione redox potential using in-cell NMR spectroscopy
Published: 1/2/2014
Authors: Steve Y. Rhieu, Aaron A Urbas, Daniel W Bearden, John P Marino, Vytautas Reipa, Katrice A Lippa
Abstract: Non-invasive and real-time analysis of cellular redox processes has been greatly hampered by lack of suitable measurement techniques. Here we describe an in-cell nuclear magnetic resonance (NMR)-based method for measuring the intracellular glutathion ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914505

2. Quantitative measurements of glutathione in yeast cell lysate using 1H NMR
Published: 2/20/2013
Authors: Steve Y. Rhieu, Aaron A Urbas, Katrice A Lippa, Vytautas Reipa
Abstract: A method for quantifying the level of glutathione (GSH) in yeast cell lysate is described using 1H NMR analysis. For quantification purposes, the 1H resonances corresponding to the Cys βCH2 of GSH were identified as having the fewest overlapping ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912059

3. In situ electrochemical small-angle neutron scattering (eSANS) for quantitative structure and redox properties of nanoparticles
Published: 2/16/2012
Authors: Vivek M Prabhu, Vytautas Reipa
Abstract: Rapid growth in nanomaterial applications highlight limitations of available physicochemical characterization methods. An in situ electrochemical small-angle neutron scattering (eSANS) meth-odology was devised that enables direct measurements of nano ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909405

4. Physicochemical characterization and in vitro hemolysis evaluation of silver nanoparticles
Published: 6/7/2011
Authors: Vytautas Reipa, Jonghoon Choi, Nam Sun Wang, Victoria M. Hitchins, Peter L. Goering, Robert Malinauskas
Abstract: In anticipation of the increased use of various forms of silver as an antimicrobial agent in medical devices, the objective of this study was to evaluate the in vitro hemolytic potential of silver nanoparticles in dilute human blood, and to relate pa ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906184

5. Nanomaterial Toxicity: Emerging Standards and Efforts to Support Standards Development
Published: 2/1/2011
Authors: Laurie E Locascio, Vytautas Reipa, Justin M Zook, Richard C. Pleus
Abstract: For the first time in the history of industrialization, nanotechnology offers the unique opportunity to consider material safety ahead of its full implementation. Many scientists around the world have been motivated by this and are working on develo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905246

6. Measurement of Nanoparticle Concentration Using Quartz Crystal Microgravimetry
Published: 12/16/2010
Authors: Vytautas Reipa, Geoffrey Purdum, Jonghoon Choi
Abstract: A common issue, encountered in nanoparticle-biological system interaction studies is accurate nanoparticle concentration expression, given the critical importance of the dose-response relationships. We present here the application of quartz crystal m ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905447

7. Association and Redox Properties of the Putidaredoxin Reductase - Oxidized Nicotinamide Adenine Dinucleotide Complex
Published: 11/13/2007
Authors: Vytautas Reipa, Marcia J Holden, V L. Vilker
Abstract: Putidaredoxin reductase (PdR) is the flavin protein that carries out the first electron transfer involved in the cytochrome P450cam catalytic cycle. In PdR, the oxidized flavin adenine dinucleotide (FAD/FADH2) redox center is reduced by two-electron ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830517

8. Covalent Attachment of Photoluminescent Silicon Nanoparticles to Streptavidin
Published: 9/11/2007
Authors: Jonghoon Choi, Peter Niarhos, Nam S. Wang, Vytautas Reipa
Abstract: We have covalently attached multiple fluorescent silicon nanocrystals (SNs) to streptavidin molecule. Selective conjugation of SNs to a target protein is accomplished using sequential silicon surface termination chemistry. In the first step, freshly ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830556

9. Photoassisted tuning of silicon nanocrystal photoluminescence
Published: 2/13/2007
Authors: Jonghoon Choi, Nam S. Wang, Vytautas Reipa
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907978

10. Photo-Assisted Tuning of Si Nano-Crystal Photoluminescence
Published: 2/2/2007
Authors: Jonghoon Choi, Nam S. Wang, Vytautas Reipa
Abstract: Silicon is rather inefficient light emitter due to the indirect-band gap electronic structure, requiring a phonon to balance electron momentum during interband transition. Fortunately, momentum requirements are relaxed in 1-5 nm dia Si crystals as a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830535



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