Abstract:
A tungsten carboxylate precursor compound useful for coating interdigitated electrodes used in hydrogen sulfide gas sensors is disclosed. A method of coating electrodes with the precursor compound using a precise solution casting technique such as spin-coating or casting, dip-casting or spray-casting techniques is also described. Electrodes which are solution coated with the precursor compound may be used to fabricate superior quality chemiresistor sensors for use in hydrogen sulfide gas sensing devices.
Abstract:
A closure element for a container of fluids. The closure element (20) has a body (23) which is attached to an outlet of the container. The closure element includes a spout (24) which is movable between a position in which it prevents fluid flow through the spout and a position in which it allows such flow. The spout (24) is dimensioned so that it extends beyond the periphery of the body (23) in both its positions to facilitate attachment to a pipe (26).
Abstract:
Omega-alkanesulfonoxyalkanamides which are useful as alkylating agents are provided. Such alkylating agents are particularly useful for appending groups of the formula -Y-CONR8R9 wherein Y is selected from the group consisting of unsubstituted or substituted trimethylene, tetramethylene, or pentamethylene; and R?8 and R9¿ are hydrogen or various hydrocarbyl radicals onto electrophylic sulfur, oxygen or nitrogen moieties.
Abstract:
An improved process for the purification of cyclic ketene acetals such as 2-methylene-1,3-dioxepane is provided. This process entails the purification of the cyclic ketene acetal by distillation in the presence of a solvent and an amine.
Abstract:
An improved process for the preparation of cyclic ketene acetals such as 2-methylene-1,3-dioxepane is provided. This process entails reacting at an elevated temperature a halogenated cyclic ketene acetal such as 2-chloromethyl-1,3-dioxepane with a hydroxide compound such as potassium hydroxide in a non-reactive alcohol such as 2-butanol.
Abstract:
Disclosed is a novel reactive diluent, dialkylpropane-1,3-bis(acetoacetate), which is useful in thermosetting coating compositions. Also provided are novel curable enamel compositions, which upon application to a substrate and subsequent curing, provide coatings having outstanding acid resistance.
Abstract:
A computed radiography patient identification system which matches a patient (24) with an X-ray image of the patient stored in a stimulable storage phosphor (42). The system includes a patient identifying bar code (66) uniquely identifying a patient; a stimulable storage phosphor identifying bar code (50) uniquely identifying a stimulable storage phosphor (42) and a portable bar code scanner (72). The bar code scanner (72) is used to scan the patient bar code (66) and the storage phosphor bar code (50) when a patient (24) is exposed to an X-ray which is stored on the stimulable storage phosphor (42). Preferably, a mobile X-ray source (2) has an associated set of bar codes (70A, 70B, 70C, 70D, 70E) identifying X-ray examination types (chest, head, limb, etc.) and/or X-ray exposure conditions. The bar code scanner (72) scans the examination type bar code (70A, 70B, 70C, 70D, 70E) at the time the X-ray of the patient is taken. The system includes a storage phosphor reader (84) for converting an X-ray image stored in a storage phosphor (42) into an X-ray image signal. The bar code identification (50) of such storage phosphor (42) is also read out. The storage phosphor reader (84) receives from the portable bar code scanner (72), information relating to patient identification, storage phosphor identification and examination type and matches the patient identification and examination type with the X-ray image signal.
Abstract:
A charge-coupled device (CCD) image sensor, which can be operated either in the interlace mode or in the non-interlace mode, includes in a substrate of a semiconductor material a plurality of photodetectors, such as photodiodes, arranged in an array of rows and columns. A separate CCD shift register in the substrate extends along each column of the photodetectors. First and second sets of conductive gates extend transversely across the CCD shift registers with each first gate extending across a portion of the photodetectors in each row and each of the second gates extending across the remaining portion of the photodetectors in each row. A transfer region extends across the substrate from a portion of each of the photodetectors to an adjacent CCD shift register. The transfer regions of alternate photodetectors in each column extends under the first gates of the photodetectors and the transfer regions of the other photodetectors in each column extends under the second gates of the respective photodetectors. To operate the CCD image sensor in an interlace mode, during the transfer stage the two sets of gates are pulsed alternately with a shift register read-out after each set of gates is pulsed to read-out one-half of a frame at a time. To operate the CCD image sensor in the non-interlace mode, during the transfer stage all of the gates are pulsed simultaneously to read-out the entire frame in a single scan.
Abstract:
A one-step process for preparing cellulose diacetates from processed film having cellulose triacetate as a base. The process involves use of an organic acid such as acetic acid and a solvolysis agent such as an alkanol or water. Hydrogen and a hydrogenation catalyst are optionally employed. The process allows for a simple way of recycling a material that presently is not recycled to any appreciable extent.
Abstract:
A printing machine includes a print head and a set of sensors adapted to accurately determine the relative position between the print head and a receiver (print media) onto which an image is to be formed. Any dislocation of the receiver from a predetermined nominal position is translated by a data conditioner into correction signals. These correction signals are integrated with nominal incoming image data directed to the print head. The print head then prints an image that compensates for positional variation of the receiver so that a resultant image is properly aligned with the receiver.