impurity

Although it behaves like a single particle, this quasiparticle actually arises from the collective motion of the impurity and the particles around it.

From Science Daily ● Jul. 9, 2026

Rather than producing a quasiparticle, the heavy impurity changes the quantum system so dramatically that the wave functions of the surrounding fermions lose their original form.

From Science Daily ● Jul. 9, 2026

It followed concerns in several countries that the products may contain the impurity.

From BBC ● Oct. 9, 2024

A specific lot labeled L200183 tested high in impurity and low in the inactive ingredient ascorbic acid, commonly called Vitamin C.

From Washington Times ● Aug. 3, 2023

Perhaps she’s the impurity in him, the static in his signal that the bullies can sense.

From "All the Light We Cannot See" by Anthony Doerr

In real materials, tiny imperfections such as atomic defects and impurities tend to disrupt these delicate quantum effects, making them nearly impossible to observe.

From Science Daily ● Apr. 15, 2026

The manufacturing process can also introduce impurities — like bacteria or heavy metals — into peptide drugs.

From Salon ● Apr. 4, 2026

The surface atoms are arranged in a uniform and highly ordered way, and unwanted impurities are greatly reduced.

From Science Daily ● Apr. 4, 2026

Novo Nordisk referenced the FDA's concerns in its lawsuit announcement on Monday, saying Hims & Hers' compounded drugs "may contain dangerous impurities or incorrect amounts of active ingredients, which can result in life-threatening immune responses".

From BBC ● Feb. 10, 2026

Jing is good leftover stuff when you take impurities out of something like gold, or rice, or salt.

From "The Joy Luck Club" by Amy Tan