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Displaying 626 - 650 of 3672

Integrated Optical Waveguides for in situ Microflow Measurements

October 15, 2017
Author(s)
James R. Hands, Gregory A. Cooksey
The need for quantitative microscale chemical and biological experiments has resulted in the increasing utilization of microfluidics with integrated sensors, allowing such architectures to synergistically enhance function and performance [1]. This work

Redox-active Nanomaterials for Nanomedicine Applications

October 6, 2017
Author(s)
Christopher Sims, Shannon Hanna, Daniel A. Heller, Christopher Horoszko, Monique Johnson, Antonio Montoro Bustos, Vytas Reipa, Kathryn Riley, Bryant C. Nelson
Nanomedicine utilizes the remarkable properties of nanomaterials for the diagnosis, treatment, and prevention of disease. Many of these nanomaterials have been shown to have robust antioxidative properties, potentially functioning as strong scavengers of

Analytical Methods and Development of Reference Materials for Toxic Metals and Metal Species in Food and Dietary Supplements

September 18, 2017
Author(s)
Stephen E. Long, Michael B. Ellisor, Frances Nilsen, Laura J. Wood, Karen E. Murphy, Lee L. Yu
Highly toxic metals such as arsenic, cadmium, lead and mercury are prevalent in the terrestrial and marine environments from both natural sources and anthropogenic activities. Contamination of food can often occur during agricultural production and food

Ionizing Radiation Processing and its Potential in Advancing Biorefining and Nanocellulose Composite Materials Manufacturing

September 1, 2017
Author(s)
Michael T. Postek, Dianne L. Poster, Andras Vladar, Mark S. Driscoll, Jay A. LaVerne, Zios Tsinas, Mohamad Al-Sheikhly
Nanocellulose is a high value material that has gained increasing attention because of its high strength, stiffness, unique photonic and piezoelectric properties, high stability and uniform structure. Through utilization of a biorefinery concept

Baseline Assessment of 25-Hydroxyvitamin D Assay Performance: A Vitamin D Standardization Program (VDSP) Interlaboratory Comparison Study

August 18, 2017
Author(s)
Christopher T. Sempos, Stephen Wise, Karen W. Phinney, Susan Tai, Johanna Camara, Gary L. Myers, Ramon Durazo-Arvizu, Lu Tian, John H. Eckfeldt, Andrew N. Hoofnagle, W. Greg Miller, Lorin M. Bachmann, Ian S. Young, J Pettit, G. Caldwell, A Liu, S P. Brooks, K. Sarafin, M. Thamm, C. Scheidt-Nave, G. B. Mensink, M. Busch, M. Rabenberg, Kevin Cashman, Mairead Kiely, Michael Kinsella, K Galvan, J. Y. Zhang, K OH, S. W. Lee, C. L. Jung, L. Cox, G. Goldberg, K. Guberg, S. Meadows, A. Prentice, G. Swan, A. Tedstone, Graham D. Carter, Julia C. Jones, P. Brannon, R. M. Lucas, P. M. Crump, Glenville Jones, E. Cavalier, Joyce Merkel, J. M. Betz
The Vitamin D Standardization Program (VDSP) coordinated an interlaboratory study to assess the comparability of measurements of total 25-hydroxyvitamin D [25(OH)D] in human serum, which is the primary marker of vitamin D status. A set of 50 individual

Development of Standard Reference Material (SRM) 2973 Vitamin D Metabolites in Frozen Human Serum (High Level)

July 24, 2017
Author(s)
Susan Tai, Michael Nelson, Brian Lang, Karen W. Phinney, Lane C. Sander, James H. Yen, J. M. Betz, Christopher T. Sempos, Stephen Wise
The National Institute of Standards and Technology (NIST), in collaboration with the National Institutes of Health, Office of Dietary Supplements (NIH-ODS) and the Vitamin D Standardization Program (VDSP), has recently issued a new serum-matrix Standard

Revisiting Shape Selectivity in Liquid Chromatography for Polycyclic Aromatic Hydrocarbons (PAHs) - Six-Ring and Seven-Ring Cata-condensed PAH Isomers of Molecular Mass 328 Da and 378 Da

June 28, 2017
Author(s)
Jorge O. Ona Ruales, Lane C. Sander, Walter Brent Wilson, Stephen Wise
The relationship of reversed-phase liquid chromatography retention on a polymeric C18 stationary phase and the shape of polycyclic aromatic hydrocarbons (PAHs) was investigated for three-ring to seven-ring cata-condensed isomers. We report the first

Cannabinoid Vapor Pressures to Aid in Vapor Phase Detection of Intoxication

June 27, 2017
Author(s)
Tara Lovestead, Thomas J. Bruno
The quest for a reliable means to detect cannabis intoxication with a br eathalyzer is ongoing. In order to design such a device, it is important to understand the basic fundamental thermodynamics of the compounds of interest. Herein, the vapor pressures
Displaying 626 - 650 of 3672
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