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Material Measurement Laboratory

Projects/Programs

Displaying 551 - 569 of 569
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Validation of Density Functional Theory for Materials

Completed
A variety of systems will be considered in this work: Pure and alloy solids will be studied using periodic DFT methods with three distinct crystal structures that are relevant to the widely-used CALPHAD (Computer Coupling of Phase Diagrams and Thermochemistry) method. This study emphasizes the
Breathalyzer

Vapor Sampling in the Field

Ongoing
Breath sampling of cannabis users. Several versions of breath collection devices are being marketed for the detection of THC (delta-9-tetrahydrocannabinol) in the breath of cannabis users. THC is not directly correlated to intoxication but may indicate recent smoking or vaping. THC and other
Dvme-Schematic

Vapor Sampling to Support Public Safety and Forensics

Ongoing
Vapor pressures of unstable, reactive compounds. Over the last decade, our group has investigated a variety of low-volatility compounds including taggants (found in explosives), biofuels, terpenes and cannabinoids. Dynamic vapor microextraction (DVME), developed at NIST, is a small-volume dynamic
Dart biopsy collection from a free-ranging bottlenose dolphin

Vertebrate Endocrine Metrology in Non-Traditional Matrices

Ongoing
NIST collaborates with stakeholders to develop techniques for measuring hormone levels as part of animal health assessment. The process of capturing and transporting animals before sampling can induce stress, which may alter the hormone levels in the bloodstream. Therefore, the collection of blood
Figure with data points and lines, with the x axis labeled “unreliability” and the y axis labeled “error”.

Virtual Measurements

Ongoing
Intended Impact When engineering data, such as for reactive-chemical hazards, are obtained using quantum chemistry, the lack of associated uncertainties means that the reliability of the data is poorly known. Safety thus requires a skeptical view, often leading to expensive over-design. Objective
Photograph of SRM 972a Vitamin D metabolites in Frozen Human Serum showing a labeled box and four bottles labeled level 1 to level 4.

Vitamin D Metabolites Quality Assurance Program (VitDQAP)

Completed
Interlaboratory comparison studies of the VitDQAP supported the reliability of vitamin D measurements, including determination of 25-hydroxyvitamin D2, 25-hydroxyvitamin D3, and 3- epi-25-hydroxyvitamin D3 in human serum and plasma. Results from the comparison studies helped participants to make

Wastewater Surveillance

Ongoing
NIST is partnering with the Department of Homeland Security Science and Technology Directorate (DHS/S&T) to develop documentary standards and reference materials to support an enduring capability in wastewater surveillance. Ongoing activities include: Development of a research grade test material
water

Water Measurement Science

Ongoing
Measurements and Standards for Contaminants in Water Accurate measurements of contaminants in water are critical to ensure the usability and safety of our water supplies. NIST has developed Standard Reference Materials (SRMs) for validating or calibrating methods for inorganic contaminants including

WebFF: Force-field repository for organic and soft materials

Ongoing
WebFF is an open and extensible force-field (FF) repository, designed to support the Materials Genome Initiative (MGI) for organic and related soft materials. The repository is built using the NIST Materials Data Curation System (MDCS) which supports ontology based database descriptions using XML

WG1 Terminology

Ongoing
Standard(s) Under Development: ISO/WD TR 20386 Inventory of biotechnology-related terms US TAG WG1 Expert: Sumona Sarkar TAG Administrator: Clare Allocca

WG2 Biobanks and Bioresources

Ongoing
Standard(s) Under Development: ISO/AWI 20387 Biotechnology - Biobanking - General requirements for Biobanking US TAG WG2 Convenor: Nilsa Ramirez, MD, College of American Pathologists TAG Administrator: Clare Allocca

WG3 Analytical Methods

Ongoing
Standard(s) Under Development ISO/WD 20391-1: Biotechnology - Cell Counting – Part 1. General Guidance on Cell Counting Methods ISO/WD 20391-2: Biotechnology - Cell Counting – Part 2. Experimental Design and Statistical Analysis to Quantify Counting Method P erformance ISO/AWI 20395: Quality

WG4 Bioprocessing

Ongoing
Standard(s) Under Development: ISO/AWI TS 20399-1: Raw materials control for bioprocessing -- Part 1: General definitions and requirements for quality control ISO/AWI TS 20399-2: Raw materials control for bioprocessing -- Part 2: Best practice guide for supplies ISO/AWI TS 20399-3: Raw materials
example sample for tomography

X-Ray Computed Microtomography

Ongoing
Impact XCT gives information that cannot be obtained any other way from opaque materials and objects. It gives us an “eye inside” so that features, of a certain size range, can be seen. The Division’s XCT instruments can reconstruct 3D images with a voxel size down to about 0.5 micrometers, at the

X-ray Stress Measurement

Ongoing
X-ray diffraction is commonly used to measure a materials crystal structure, crystal lattice orientation, and the spacing of the lattice planes. Our X-ray systems are designed to measure the spacing of one or two specifically selected lattice plane reflections for a given material. The systems use
Catalyst Testbed

X-ray Testbed for Breakthrough Catalyst Measurements

Ongoing
Interested in collaborating? See below What does this project do for industry? Current measurement techniques are unable to follow the reaction pathways during catalysis and are limited to observing only the end products or looking at catalysts outside of realistic reaction conditions. Our new

Yield Surface Measurement

Ongoing
The overarching philosophy for this project is to develop standard tests that produce clean multiaxial yield data for sheet metal that will be of use to the automotive industry in lightweighting efforts. To this end, it is required that the sheet being tested remain in the as-received condition (no
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