Abstract: A tag detection system comprising a source for producing an interrogation signal having a first frequency; a harmonic radar tag comprising: an antenna structure; a tunneling junction electrically and integrally coupled to the antenna; and wherein the harmonic radar tag when stimulated by the interrogation signal having the first frequency, and the harmonic radar tag produces a response signal at a second frequency different from the first frequency.

Abstract: This disclosure relates to methods and apparatuses for simultaneous measurement of multiple analytes in samples. This disclosure relates to methods and apparatuses for determining the concentration of one or more analytes in a fluid sample without use of a calibrant.

Abstract: There is described a microvalve system having a first body portion having a fluid channel defined in a face, an electrode disposed in the fluid channel and electrically connectable to a power source, a channel membrane disposed over the fluid channel and aligned with the electrode, and a second body portion disposed on the first body portion, the first body portion comprising a liquid receiving cavity aligned with the membrane. The liquid receiving cavity is adapted to receive an electrical conducting liquid that is electrically connectable to the power source. The channel membrane is displaceable towards the electrode upon application of an electrical potential difference between the electrode and the electrical conducting liquid in order to at least partially obstruct the fluid channel.

Abstract: There is described a microvalve system having a first body portion having a fluid channel defined in a face, an electrode disposed in the fluid channel and electrically connectable to a power source, a channel membrane disposed over the fluid channel and aligned with the electrode, and a second body portion disposed on the first body portion, the first body portion comprising a liquid receiving cavity aligned with the membrane. The liquid receiving cavity is adapted to receive an electrical conducting liquid that is electrically connectable to the power source. The channel membrane is displaceable towards the electrode upon application of an electrical potential difference between the electrode and the electrical conducting liquid in order to at least partially obstruct the fluid channel.

Abstract: Improved detection and enumeration of magnetic particles in a flowing stream by enveloping the particle-containing sample stream with buffer streams from the sides and from the top, thus individualizing the particles and navigating the sample stream as a single-file flow into the proximity of sensors embedded underneath the flow channel. At the same time, larger physical size of the flow channel alleviates problems such as channel clogging. Magnetic particles can represent any analyte of interest, such as biomolecules or bacterial cells, which are labeled with magnetic labels.