Abstract: The present invention relates to a novel method to determine CETP activity in a bodily fluid sample wherein the sample may contain an inhibitor of CETP activity. The effect of the inhibitor is preserved to provide a more accurate determination of CETP activity in the fluid. Kits for the practice of the method are also provided.

Abstract: Improved methods for assaying the activity of phospholipid transfer protein (PLTP) enhance the signal-to-noise ratio by providing the substrate in donor particles with an aqueous core in the presence of suitable osmotic pressure.

Abstract: Spectrophotometric assays are rendered more sensitive by adding to the assay mixture a light-emitting moiety. The decrease in intensity of light emitted due to the presence of a light-absorbing moiety associated with the photometric assay is much more sensitive to analyte than the absorbance of the light-absorbing moiety itself.

Abstract: Two wheatstone bridge circuits, each having detectors in the form of strain gages in the arms thereof, are connected to carry out detection of entry into the perimeter of the detection area such as the main deck of a boat. Each of the wheatstone bridge circuits has a strain gage mounted on the underside of the main deck or therein in a corresponding one of four areas of the perimeter being secured so that two strain gages of the system carry out intruder detection by imbalance of the corresponding bridges when an intruder enters an area. Each bridge circuit has an amplifier connected to receive the corresponding bridge circuit output and an AND logic circuit voltage output controls activating triggering of a monitor circuit when both bridge circuits are imbalanced. Each amplifier is adjustable so that individual bridge circuit sensitivity is possible to compensate for environmental and operating conditions on the main deck of a vessel or boat.