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1/100 Legal Ohm Resistance Standard

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kilograms under glass jars — Kilograms at NIST

Peanut butter standard reference material. — Peanut butter

Magdalena Navarro and Bill Gadzuk with the Chart of the Radionuclides

A small particle against a porous background. — Abraded EFTE particle

6 people standing on a stage in front of a screen that reads: 26th CGPM — U.S. Delegation to CGPM SI Redefinition Vote

Man holding a NIST on a Chip device — Jim Olthoff with NOAC

Woman in large indoor hallway standing next to tall stack of electronic equipment. — Antenna robot

Two firefighters look over the last flames inside a compartment where the flammability of cross-laminated timber buildings is being tested. — NIST Firefighters at End of Cross-Laminated Timbers Fire Test

gold chip — SET Chip

Two meter bars with a red background — Meter Bar

Square device surrounded by a design of gold wiring. — Ion Trap

BMF Interior

Researcher Brandon Lane making adjustments inside the large 3D printer — Additive Manufacturing Metrology Testbed

NIST-4 Watt Balance

NIST Stone Test Wall mortar work — NIST Stone Test Wall mortar

Researcher Erica Stein pipetting under chemical hood — Erica Stein pipetting

NIST Josephson voltage chip

graphene chips

QEMMS Kibble Balance

Two researchers in safety glasses stand at the edge of a metal table holding electronic and laser devices, wiring and metal structures. — Hoth and Gerginov work on NIST-F4

Man with safety glasses working on clock — Portable Optical Clock

Three team members in construction safety gear stand talking inside the large warehouse where materials testing is taking place. — Champlain Towers South researchers at Minnesota

Krister Shalm wears safety glasses as he leans over a lab table covered with electronics equipment. — Krister Shalm working in lab

Researchers in white hazmat coveralls reach into an open freezer with a scooping device as vapor rises from the freezer. — Researchers with fecal samples

A scientist wearing protective equipment places a tray of diced geoduck clam tissue into large open machinery. — Researcher and geoduck clam tissue

Antenna lab screenshot

Black and white enlarged image of moon dust particle — Moon dust particle (4 of 4)

Nicole Yunger Halpern

Three men wearing safety glasses stand around a wooden box they are assembling in the lab. — Jae Hyun Kim and colleagues in the insulation lab

Side-by-side photos show a buoy with attached scientific devices on the deck of a ship and then floating in the ocean. — MarONet buoy

Alejandra Collopy wears safety glasses as she works the lab. She is surrounded by various pieces of equipment and many hanging wires. — Alejandra Collopy in the lab

A close-up shot of hand holding a circular lid over a piece of blue clothing on top of a scientific device. — Near-infrared spectroscopy of clothing sample

Briana Capistran wears safety glasses and purple gloves as she prepares small vials at a lab table. — Briana Capistran prepares samples

NIST-on-a-Chip lab setup

Chart shows how actinium-225 breaks down into six other elements, each of which emits certain types of radiation. — Radioactive decay chain of actinium-225

Diagram shows a radioisotope attached to a cancer-targeting molecule and how the molecule attaches to a cancer cell and injects alpha radiation. — Actinium-225 illustration with cancer cell and alpha radiation

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