The present disclosure provides novel methods to purify and quantify extracellular vesicles (EVs) in biological samples, e.g plasma or cerebrospinal fluid (CSF).

A device including at least one sensing bulk acoustic wave (BAW) resonator including a sensing surface; a fluid channel, wherein the sensing surface of the at least one sensing BAW resonator is disposed adjacent to or within the fluid channel; at least one resistive heater; and at least one temperature detector, wherein the at least one temperature detector is configured to monitor the temperature adjacent to the at least one BAW resonator and affect a current to be passed through the at least one resistive heater.

The invention provides methods for quantifying a non-ionic surfactant in a composition comprising a polypeptide and the non-ionic surfactant, where the quantification exhibits reduced interference between the non-ionic surfactant and the polypeptide. Also provided are methods where the composition further includes N-acetyl tryptophan, and the quantification exhibits reduced interference between the non-ionic surfactant, the polypeptide, and N-acetyl tryptophan.

The invention provides methods for quantifying a non-ionic surfactant in a composition comprising a polypeptide and the non-ionic surfactant, where the quantification exhibits reduced interference between the non-ionic surfactant and the polypeptide. Also provided are methods where the composition further includes N-acetyl tryptophan, and the quantification exhibits reduced interference between the non-ionic surfactant, the polypeptide, and N-acetyl tryptophan.

The present disclosure provides an analysis method for measuring the content of light chain-exchanged molecules in a composition containing a multi-specific antigen-binding molecule. The analysis method of the present disclosure includes the steps of: treating a composition comprising a multi-specific antigen-binding molecule and preparing a plurality of types of F(ab) fragments; and measuring the F(ab) fragments by a separation method based on electric charge or hydrophobic interactions and determining the content (content ratio) of each fragment.

The present disclosure relates to an improved method for the manufacture of polypeptides comprising at least three or at least four immunoglobulin single variable domains (ISVDs). More specifically, an improved method is provided of producing, purifying and isolating polypeptides comprising at least three or at least four ISVDs in which an undesired product-related conformational variant is reduced or absent.

The present disclosure relates to an improved method for the manufacture of polypeptides comprising at least three or at least four immunoglobulin single variable domains (ISVDs). More specifically, an improved method is provided of producing, purifying and isolating polypeptides comprising at least three or at least four ISVDs in which an undesired product-related conformational variant is reduced or absent.

The present invention relates to monolithic bodies, uses thereof and processes for the preparation thereof. Certain embodiments of the present invention relate to the use of a monolithic body in the preparation of a radioactive substance, for example a radiopharmaceutical, as part of a microfluidic flow system and a process for the preparation of such a monolithic body.

The present invention relates to monolithic bodies, uses thereof and processes for the preparation thereof. Certain embodiments of the present invention relate to the use of a monolithic body in the preparation of a radioactive substance, for example a radiopharmaceutical, as part of a microfluidic flow system and a process for the preparation of such a monolithic body.

A nebulizer for a charged aerosol detection (CAD) system is disclosed. The nebulizer is provided with a spray emitter for generating a spray of droplets within a central region of a spray chamber. The central region is separated from an upper region by a horizontally projecting rib, which defines a passageway between the central and upper regions. The major direction of droplet travel within the upper region is substantially reversed with respect to the major direction of droplet travel within the central region. Larger droplets are unable to negotiate the turn from the central to upper regions and impinge on a rear surface of the spray chamber. Removal of larger droplets has the advantageous effect of enabling the detector to sense a smaller range of particle sizes, which establishes a relatively steady electrical current at the detector.