Abstract:
A internal circuitry protection scheme which protects on-IC circuitry when an external pin is shorted to a higher than normal voltage. The disclosed solution eliminates cross-talk due to a parasitic NPN.
Abstract:
The ARC/INFO.RTM. geographic information system (GIS) computer program (28) supports multiple threads of command line (TTY) and graphic user interface (GUI) operations. A TTY operation at the top of a thread enables the program (28) to be controlled from a keyboard (20) through a terminal emulator (26), whereas a GUI operation at the top of a thread enables the program 28 to be controlled by a mouse (22) using a window display (24). Switching from TTY to GUI control of the program (28) in its stand-alone form requires a command from its input stream, whereas switching from GUI to TTY control requires a manual trigger from a mouse (22) or keyboard (20). A controller (44) of the invention normally enables GUI control by inserting a dummy GUI operation (50) including a dummy window as an artifact on top of a TTY operation (46) in a thread (48). In response to a TTY command from the keyboard (20) or a user program, the controller (44) deletes the dummy window, causing the dummy GUI operation (50) to be deleted from the thread (48) and enabling TTY control from the keyboard (20). The controller (44) then feeds the command to the program (28), and inserts the dummy GUI operation (50) back on top of the TTY operation (46) in the thread (48) to enable subsequent GUI control.
Abstract:
Imidazole and indole compounds were found to inhibit neural nitric oxide synthase (bNOS) activity. Nortopsentin-C inhibited bNOS as well as calcineurin activities suggesting that its actions are directed against calmodulin, a co-factor common to these two enzymes. Two indole compounds, as well as dragmacidin-D, inhibited bNOS, but not calcineurin, activity. Murine macrophage viability and induced NOS (iNOS) activity in cultured cells was also unaffected by these compounds.
Abstract:
Discorhabdin compounds are derived from marine sponges of the genus Batzella or prepared by synthetic methods. These compounds, and pharmaceutical compositions containing them as active ingredients, are useful as immunomodulatory, antitumor agents, and/or caspase inhibitors.
Abstract:
A zener diode capable of breakdown at much higher voltages than in the prior art is fabricated by providing a semiconductor substrate of a first conductivity type having an opposite conductivity type first tank disposed therein. The first tank includes relatively lower and relatively higher resistivity portions, the relatively lower doped portion isolating the relatively higher doped portion from the substrate. A first region of first conductivity type is disposed in the higher doped portion and a second region of opposite conductivity type and more highly doped than the first tank is spaced from the first region. Structure is provided between the first and second regions for repelling majority charge carriers associated with the opposite conductivity type which can be a field plate spaced from the first tank; a portion at the surface of the first tank having the first conductivity type; or a tank, of first conductivity type disposed in the first tank, abutting the first region, extending more deeply into the first tank than does the first region and more lightly doped than the first region. In accordance with a further embodiment, the diode includes a semiconductor substrate, a first tank portion disposed in the substrate and a second tank portion disposed in the first tank portion as in the prior embodiments. A first region of first conductivity type is disposed in the second tank portion and extends into the first tank portion. A second region of opposite conductivity type more highly doped than the first tank portion is disposed in the first tank portion and spaced from the first region.
Abstract:
In the commonly used method to obtain antibodies to small molecules, a combination of a highly antigenic carrier, such as bovine serum albumin, and the small molecule is injected into a host animal. The recovered crude serum or plasma then contains, in addition to the desired small molecule antibodies, much larger amounts of carrier-induced antibodies. These unwanted antibodies are efficiently removed from the crude serum or plasma, by contacting the crude serum or plasma with the carrier material in an immobilized high surface area form. Rapid and efficient anticarrier antibody removal results, with minimal loss of both desired antibody, and desired antibody activity.
Abstract:
In accordance with the present invention, an output current limit circuit for protecting a power MOS output device of an integrated circuit from an excessive drain current comprises a power MOS device 110, sensing circuitry 30 to sense a predetermined trigger current, and limitation circuitry 20 to reduce a gate-source voltage on MOS output device 110 to a predetermined approximately fixed value. A drain current I.sub.D flows through power MOS device 110 from output terminal 102 in response to the gate-source voltage. A short circuit condition may allow an excessive amount of drain current I.sub.D to flow through output terminal 102. The gate-source voltage is reduced in response to sensing the trigger current. Reducing the gate-source voltage raises a drain-source resistance of MOS device 110 and reduces drain current I.sub.D so that MOS device 110 is not damaged by the short circuit condition.
Abstract:
A pultruded composite member having a longitudinal axis comprising a plurality of reinforcing fibers in a solid polymer matrix, said member having embedded at least one functional feature having been incorporated therein during its manufacture when the fiber reinforced liquid polymer was pulled through a pultrusion apparatus.
Abstract:
A novel macrolide compound, lasonolide A, has been isolated from a marine sponge. This compound, derivatives of the compound, and compositions comprising the compound or its derivatives, are useful as antitumor agents and as biochemical tools.
Abstract:
Radio frequency reuse between two or more radio frequency communications systems is facilitated by having a beacon transmitter broadcast information globally throughout an area, which information identifies to users of a second system, which radio frequency resources are already in use by a first communications system. The global broadcast of information as to what channels are in use, permits users in the second system to avoid interfering use of those frequencies.