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NIST Authors in Bold

Displaying 14826 - 14850 of 73893

Advances in RRAM technology: identifying and mitigating roadblocks

January 13, 2017
Author(s)
Dmitry Veksler, Gennadi Bersuker
The filament-based RRAM has demonstrated superior scalability, endurance, low power operation, retention, and operating speed. A challenge navigating trade-offs between high density, low switching power, and stability can be addressed by capitalizing on

COMMUNITY RESILIENCE OF LIFELINE SYSTEMS: SOCIETAL NEEDS AND PERFORMANCE ASSESSMENT

January 13, 2017
Author(s)
Chris Rojahn, Laurie Johnson, Thomas O'Rourke, Veronica Cedillos, Therese P. McAllister
The concept of community resilience is a complex, multi-dimensional problem that relies on social science, engineering, earth sciences, economics, and other disciplines to improve the way communities prepare for, resist, respond to, and recover from

Identifying NIST Impacts on Patenting: A Novel Data Set and Potential Uses

January 13, 2017
Author(s)
Gary W. Anderson Jr.
The National Institute of Standards and Technology’s (NIST) mission is to “promote U.S. innovation and industrial competitiveness.” To meet this mission, NIST scientists produce a great variety of scientific and technical outputs. This paper present

Determination of Liquid Density

January 12, 2017
Author(s)
Lane C. Sander, Lorna T. Sniegoski
The determination of solution density is required for conversion of liquid solution levels from a mass fraction basis to a volume fraction basis. This presentation will provide information about three approaches in common use for the determination of

Liquid Chromatography: Introduction and Instrumentation

January 12, 2017
Author(s)
Lane C. Sander
Chromatography is an example of a process by which a mixture is separated into at least two fractions with different compositions. This presentation will provide a brief overview of the practice of liquid chromatography (LC), with an emphasis on

Measurement of Uranium-236 in Particles by Secondary Ion Mass Spectrometry

January 12, 2017
Author(s)
David S. Simons, John D. Fassett
The determination of the relative isotopic abundance by secondary ion mass spectrometry of 236U in uranium-containing material is complicated by the presence of 235U1H+ ions at the same nominal mass as the uranium isotopic peak. The net intensity of the

Plumbing for Liquid Chromatography

January 12, 2017
Author(s)
Lane C. Sander
The setup and maintenance of liquid chromatographic equipment requires a basic knowledge of chromatographic hardware. Tubing connections are an essential component in liquid chromatography instrumentation. System function and performance depend on the

Preparation of Calibration Solutions

January 12, 2017
Author(s)
Lane C. Sander, Michele M. Schantz
Calibration solutions provide the basis for quantitation for most instrumental techniques. The instrumental responses for analytes in calibrants of known composition are compared with corresponding responses in samples to provide quantitation of the

Pressurized Fluid Extraction

January 12, 2017
Author(s)
Lane C. Sander
Pressurized fluid extraction (PFE) is one of several sample preparation methods that can be used to extract targeted analytes from a sample matrix into a solvent, to permit subsequent analysis. With PFE, samples are extracted with solvent in a pressurized

Principles of Quantitation: Chromatography

January 12, 2017
Author(s)
Lane C. Sander
The accurate characterization of the chemical composition of a sample depends on a variety of factors that must be considered by the analyst. Knowledge of how different approaches to quantitation affect the measurement accuracy is requisite to the

Sample Concentration and Processing

January 12, 2017
Author(s)
Lane C. Sander
Sample Concentration and Processing Sample concentration is a common step in sample preparation prior to analysis that is performed to increase method sensitivity or to exchange solvent environment. Sample concentration can be thought of as a separation

Sorting carbon nanotubes

January 12, 2017
Author(s)
Ming Zheng
Sorting of single-wall carbon nanotubes by their electronic and atomic structures in liquid phases is reviewed in this chapter. We first introduce the sorting problem, then provide an overview of several sorting methodologies, following roughly the

Soxhlet Extractions

January 12, 2017
Author(s)
Lane C. Sander
Soxhlet extraction is one of several sample preparation methods that can be used to transfer targeted analytes from a sample matrix into a solvent, to permit subsequent analysis. With Soxhlet extraction, samples are repeatedly extracted with solvent

Tricritical Point of the f-Electron Antiferromagnet USb 2 Driven by High Magnetic Fields

January 12, 2017
Author(s)
Ryan L. Stillwell, I Lin NMN Liu, N. Harrison, M. Jaime, J. R. Jeffries, Nicholas Butch
In pulsed magnetic fields up to 65T and at temperatures below the Neel transition, our magnetization and magnetostriction measurements reveal a field-induced metamagnetic-like transition that is suggestive of an antiferromagnetic to polarized paramagnetic

Troubleshooting Liquid Chromatographic Instrumentation and Methods

January 12, 2017
Author(s)
Lane C. Sander
The ability to assess analytical performance is a fundamental component of measurement science. Ultimately, measurement quality depends on the proper function of instrumentation in combination with appropriate methods. Evidence of proper function is

Use of Analytical Balances

January 12, 2017
Author(s)
Lane C. Sander
The determination of mass is a fundamental component in quantitative analysis, and weighing accuracy is an important factor for most applications. This presentation will highlight the use of different types of analytical balances and will demonstrate

Volumetric Transfer of Liquids

January 12, 2017
Author(s)
Lane C. Sander
Although volumetric measurements are usually less accurate than gravimetric based measurements, volumetric measurements are still in common use due to the convenience, and often higher throughput, that may be afforded by automatic pipettes. Analysts should

What is Chromatography All About?

January 12, 2017
Author(s)
Lane C. Sander
Chromatography is an example of a process by which a mixture is separated into at least two fractions with different compositions. Other separation methods exist, such as distillation, recrystallization, and extraction. Chromatography is used to analyze

Dietary Supplement Laboratory Quality Assurance Program: Exercise G Final Report

January 11, 2017
Author(s)
Kate Rimmer, Laura J. Wood, Melissa M. Phillips
The NIST Dietary Supplement Laboratory Quality Assurance Program (DSQAP) was established in collaboration with the National Institutes of Health (NIH) Office of Dietary Supplements (ODS) in 2007 to enable members of the dietary supplements community to
Displaying 14826 - 14850 of 73893
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