Abstract: The present invention provides an underdrain having an improved spout. The underdrain has particular utility in the construction of both single-well and microarray filtration devices. In a principal embodiment, the underdrain is characterized by its incorporation of a straight-walled, roughly-textured spout, the spout being provided with microhole(s) at a terminal end thereof for the discharge of fluid conducted through the underdrain. An array comprising several of such underdrains can be mated with a corresponding array of wells, with separation material (e.g., membrane material) provided therebetween. The resultant microarray filtration device can be used for conducting several fluid assays contemporaneously with, for example, good “pendant drop” control and low “cross-talk”.

Abstract: A laboratory device design particularly for a multiplate format that includes a tray having at least one well with a support associated with the well, and a removable undercover. The undercover protects the support or membrane from external contamination without causing excessive force on an individual well that can cause membrane flatness. The undercover is easily removable to provide access to the support or membrane. The undercover, when affixed to the underside of the multiwell plate or tray, allows the assembly to be transportable as a single unit while still being in compliance with SBS automation standards.

Abstract: Laboratory device design particularly for a multiplate format that includes a plate or tray having a plurality of wells, and a drain in fluid communication with each of the plurality of wells. The plate is a one-piece design having a honeycomb structure that brings high rigidity to the plate in order to accept very high centrifugal load. The design also maximizes the well volume and active filtration area while remaining in compliance with SBS format.

Abstract: A laboratory device design particularly for a multiplate format that includes a tray having at least one well with a support associated with the well, and a removable undercover. The undercover protects the support or membrane from external contamination without causing excessive force on an individual well that can cause membrane flatness. The undercover is easily removable to provide access to the support or membrane. The undercover, when affixed to the underside of the multiwell plate or tray, allows the assembly to be transportable as a single unit while still being in compliance with SBS automation standards.

Abstract: Endocardiac probe for a pacemaker, this probe is of the type comprising a helically wound lead (1) enclosed in a flexible sheath (2), with an electrode fitted on the tip of said lead, characterized by said electrode being formed of an annular piece (4) traversed by an attachment member (5-6) comprising a stem (5) engaging inside the windings of the conductor lead (1) and a head (6) securing the electrode (4) in its proper position.