impurity

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

"OTOCs were actually invented in a very different context about 55 years ago, when they were used to look at how electrons in superconductors are affected by disturbances from an impurity," Wolynes said.

This lithium impurity in the plasma changed the dynamics of the charge exchange and allowed the plasma to retain hydrogen ions added by the neutral beam without booting out other hydrogen ions, resulting in an overall increase in plasma density.

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

Lupin Pharmaceuticals, which manufactures Tydemy, notified customers on Saturday that it was voluntarily recalling two batches of the oral contraceptive — after one lot tested low for ascorbic acid and high “for a known impurity.”