Abstract:
One aspect of the present invention provides a method for determining orientation of fibers in a fluid having polymer chains, characterized in that the determining of the orientation of the fibers is performed by taking into consideration an interaction between the fibers and the fluid, wherein the interaction between the fibers and the fluid comprises changes in configuration of the polymer chain to cause the entanglement or adsorption between the fibers and the polymer chains. Another aspect of the present invention provides a method for determining orientation of fibers in a fluid having polymer chains, the fibers in the fluid including a transitional movement and a rotatary movement, the method being characterized in that the determining of the orientation of the fibers is performed by taking into consideration a steric barrier effect on a rotary movement of the fibers.
Abstract:
One aspect of the present invention provides a method for determining orientation of fibers in a fluid having polymer chains, characterized in that the determining of the orientation of the fibers is performed by taking into consideration an interaction between the fibers and the fluid, wherein the interaction between the fibers and the fluid comprises changes in configuration of the polymer chain to cause the entanglement or adsorption between the fibers and the polymer chains. Another aspect of the present invention provides a method for determining orientation of fibers in a fluid having polymer chains, the fibers in the fluid including a transitional movement and a rotatary movement, the method being characterized in that the determining of the orientation of the fibers is performed by taking into consideration a steric barrier effect on a rotary movement of the fibers.
Abstract:
One aspect of the present invention provides a method for determining orientation of fibers in a fluid having polymer chains, characterized in that the determining of the orientation of the fibers is performed by taking into consideration an interaction between the fibers and the fluid, wherein the interaction between the fibers and the fluid comprises changes in configuration of the polymer chain to cause the entanglement or adsorption between the fibers and the polymer chains. Another aspect of the present invention provides a method for determining orientation of fibers in a fluid having polymer chains, the fibers in the fluid including a transitional movement and a rotatary movement, the method being characterized in that the determining of the orientation of the fibers is performed by taking into consideration a steric barrier effect on a rotary movement of the fibers.
Abstract:
A capillary valve, connector and router where one or more cylindrical fibers, which may be capillaries, plugged capillaries, optical fibers, or the like, including at least one capillary tube (12a) are contained in a first cylindrical bundle of fibers that terminates at a first face (18a). A second cylindrical bundle of fibers also containing one or more fibers including at least one capillary tube (12b) terminates in a second face (18b) abutting the first face.
Abstract:
A compact, movable scan head (10) has multiple scanning modalities, capable of high speed and high resolution scanning of a variety of samples (20). Stimulation and detection of storage phosphor screens and fluorescent samples (20) are preferably achieved with first and second channels (81, 82) in an optical path of a first side (11) of the scan head (10). The first side (11) preferably has a laser diode light source (14). Reading of reflective and transmissive signals is also possible. A third channel (83) is available in the optical path of a second side (12) of the scan head (10). The third channel preferably provides LED (32) point scanning and reading of fluorescent, reflective and transmissive signals received from the sample (20). The various modalities of the scan head (10) have coincident optical paths.
Abstract:
A method for microphotometering individual volume elements of a microscope specimen, comprising generating a luminous dot or cursor and progressively illuminating a plurality of part elements in the focal plane of the microscope (30) through the specimen. The mutual position between the specimen and the focal plane is then changed and a plurality of part elements in the focal plane are illuminated. Reflected and/or fluorescent light and transmitted light respectively created by the illumination is collected, detected and stored for generating a three-dimensional image of that part of the specimen composed of the volume elements. Illumination of multiples of part elements is deflected by deflecting the luminous cursor or by moving the specimen or by both deflecting the cursor and also displacing the specimen. The change in the relative mutual position between the specimen and the focal plane of the microscope (30) is effected either by displacing the specimen or the objective. Apparatus for carrying out the method include a specimen table (301), a microscope objective and light source (31, 32, 33). The table (301) or the objective are arranged for stepwise movement along the main axis of the microscope synchronously with punctilinear light scanning of the specimen. The table (301) is arranged for stepwise movement at right angles to the main axis and/or the light source (31, 32, 33) is arranged for deflection over the focal plane through the specimen.
Abstract:
A substrate (15) with a plurality of microchannels is movably deployed with other movable objects that will load sample into the microchannels, stimulate molecular migration, read the results of the migration, remove and replace the substrate (15), and prepare for a new run. The other objects include a gripper (11) for engaging and moving the substrate, an electrode array of fine wires (78) suitable for fitting into the microchannels for electromigration, and a scanning detector for reading migration results. A sequence of automatic operations is established so that one substrate after another may be moved into position, loaded with sample, stimulated for molecular migration, read with a beam, and then removed and replaced with a fresh substrate.
Abstract:
The present invention features two flat-field, telecentric, infinite conjugate, achromatic objectives (32 and 34) each of which has an external pupil lying in a common plane located equidistant from the two objectives, defining a mechanically accessible central pupil (30) of an imaging system centered in the common plane (28). Each of the objectives is afocal in the common plane, with one of the lenses forming a focal plane proximate to a sample. The lenses are adapted to provide varying levels of magnification while keeping constant the number of resolvable points in the field of view. An array detector (14) is positioned proximate to a focal plane formed of the remaining objective lens (34). The double objective lens assembly is described as being included in transillumination and epi-illumination systems.
Abstract:
A microspot deposition system (12) featuring a hollow cylindrical wall (26) extending from a closed end (28), terminating in an open end (30) and including a longitudinal gap (34) extending from the open end (30) toward the closed end (28) to allow the rapid exhaustion of the atmosphere and efficient cleaning within the cylindrical wall (26). The cylindrical wall (26) defines a lumen (32) with both the lumen (32) and the gap (34) adapted to facilitate capillary action of liquid in fluid communication therewith to form a meniscus (46) proximate to the open end (30). To facilitate deposition of liquid contained within the lumen (32), the gap (34) may be tapered so that it is narrowest proximate to the open end (30). The narrowed portion of the gap (34) results in a meniscus (46) having a reduced area to ensure preferential fluid flow toward the open end (30), which facilitates deposition via capillary action between the liquid in the lumen (32) and a working surface (52).