Abstract: A calibration and verification system for a directional sensor, including an industrial control computer and a directional sensor, wherein the industrial control computer is connected to a sensor signal acquisition system, a first triaxial Helmholtz coil and a second triaxial Helmholtz coil, respectively, wherein a heating calibration turntable is disposed in the first triaxial Helmholtz coil and configured to heat and calibrate the directional sensor, and wherein a high-precision inclination and azimuth test turntable is disposed in the second triaxial Helmholtz coil and configured to verify the directional sensor.

Abstract: The present disclosure refers to a method of obtaining metal ions from a battery, the method comprising adding a crushed battery to a leaching solution comprising fruit and an ammonium salt, thereby obtaining a leachate comprising metal ions.

Abstract: The present invention provides an amino acid-functionalized nanoparticle, comprising: a nanoparticle having a dimension in the range of units of nanometers to 100 nanometers, and having an external surface; and a plurality of amino acid molecules conjugated to the external surface of the nanoparticle, the amino acid molecules having a chemical property that can induce a cancer cell to ingest the functionalized nanoparticle; a method of producing such a nanoparticle; and uses of the nanoparticle.

Abstract: The present disclosure refers to a method of obtaining metal ions from a battery, the method comprising adding a crushed battery to a leaching solution comprising fruit and organic acid, thereby obtaining a leachate comprising metal ions, wherein the method is performed at a temperature above 80° C.