摘要:
Methods and devices for inline sampling of a bulk material, such as a powder, are provided. The material's bulk density can be determined from samples drawn using methods and devices described herein. One embodiment of a method of sampling a material allows the material to flow through a sampling compartment, closes off the flow of material below the sampling compartment, builds up a column of material through the sampling compartment, shifts the sampling compartment to remove a slice of material in the column, and places the slice of material into a sample container. A device for sampling a material is provided in another embodiment. The device includes an inlet, an outlet aligned with the inlet, and a sample collector. The sample collector can include at least one through hole and be configured to move such that the at least one through hole can be moved into and out of alignment with the inlet and the outlet.
摘要:
Methods and devices for inline sampling of a bulk material, such as a powder, are provided. The material's bulk density can be determined from samples drawn using methods and devices described herein. One embodiment of a method of sampling a material allows the material to flow through a sampling compartment, closes off the flow of material below the sampling compartment, builds up a column of material through the sampling compartment, shifts the sampling compartment to remove a slice of material in the column, and places the slice of material into a sample container. A device for sampling a material is provided in another embodiment. The device includes an inlet, an outlet aligned with the inlet, and a sample collector. The sample collector can include at least one through hole and be configured to move such that the at least one through hole can be moved into and out of alignment with the inlet and the outlet.
摘要:
A device for characterizing the biological properties of cells can include a plurality of dual-compartment assay chambers wherein the compartments of each chamber are separated by a cell layer across which ions can flow. The biological properties of the cell layer in the presence or absence of experimental compounds can be determined by measuring an electrical gradient across the layer. A individual dual-compartment chamber of this type may be referred to as an “Ussing chamber.”
摘要:
A device for characterizing the biological properties of cells can include a plurality of dual-compartment assay chambers wherein the compartments of each chamber are separated by a cell layer across which ions can flow. The biological properties of the cell layer in the presence or absence of experimental compounds can be determined by measuring an electrical gradient across the layer. A individual dual-compartment chamber of this type may be referred to as an “Ussing chamber.”
摘要:
Apparatus and method for assembling solder balls in a selected one of several different patterns for delivery to connector pads on an integrated circuit package, or other receiver, includes a universal template containing holes at locations in an aggregate pattern of all hole locations for the several different patterns, and includes a subtemplate for each individual different pattern that contains posts at locations for insertion from the rear of the template into holes therein at locations where no surface recess is desired. The universal template may remain aligned with an assembly jig or holder of packages while only the subtemplate is changed to change the surface pattern of holes into which solder balls may then be distributed.
摘要:
A liquid level sensor comprises a plurality of electrodes arranged in a defined relationship with respect to a container filling trajectory, a signal generator coupled to one or more of the plurality of electrodes, a signal receiver coupled to one or more of the plurality of electrodes, and a sensing circuit coupled to at least one of the signal generator and signal receiver. The sensing circuit is configured to produce an output indicative of electrical resistance between at least one pair of the plurality of electrodes. The sensing circuit may be associated with the signal receiver and/or with the signal generator.
摘要:
Disclosed herein are systems and methods for detecting motion of an object, such as the paw of rat. A tag comprising an inductive element and a capacitive element may be attached to the object and the motion detected by monitoring the affect of the tag on a time-varying magnetic field.
摘要:
A liquid level sensor comprises a plurality of electrodes arranged in a defined relationship with respect to a container filling trajectory, a signal generator coupled to one or more of the plurality of electrodes, a signal receiver coupled to one or more of the plurality of electrodes, and a sensing circuit coupled to at least one of the signal generator and signal receiver. The sensing circuit is configured to produce an output indicative of electrical resistance between at least one pair of the plurality of electrodes. The sensing circuit may be associated with the signal receiver and/or with the signal generator.
摘要:
Disclosed herein are systems and methods for detecting motion of an object, such as the paw of rat. A tag comprising an inductive element and a capacitive element may be attached to the object and the motion detected by monitoring the affect of the tag on a time-varying magnetic field.
摘要:
The invention is an automated multiple-purpose, integrated laboratory system comprising interchangeable modular elements for the construction and measurement of biological assays. The functions of the modular elements may include multiwell platform handling, chemical reagent or cell management, volumetric transfer of liquids for assay construction or for recovery of reaction products for analysis, incubation under controlled environmental conditions, measurement of spectrometric signals originating from the assays, processing and analysis of the resulting spectrometric data, and other functions. The modular elements are arranged around a number of robotic elements that deliver plates to different modular elements, transfer plates to groups of modules served by a different robotic element, or other actions necessary in plate handling. Liquid transfer to and from multiwell platforms, necessary for assay construction or for the initiation of physiological events in cells, is partitioned among different modules specialized for transferring nanoliter or smaller volume quantities of chemical concentrates, or microliter quantities of assay reagents, cells, media and other assay constituents. Applications of this invention include the quantitation and analysis of the expression of multiple genes in cells, measurement of multi-gene expression kinetics, analysis of activation or suppression of multiple signal transduction pathways, screening chemical compounds for modulatory effects on multi-gene expression or on signal transduction pathways or on other biochemical networks of cells, or other analytical biological or biochemical assays.