Abstract:
The service life of amperometric electrochemical oxygen sensors is increased by operating the electrodes of such sensors at a polarization voltage suitable for measuring the oxygen content of samples only during calibration or when measuring such samples and thereafter modulating the polarization voltage to a lower voltage such that substantially no electrical current is produced by the electrodes.
Abstract:
A technique for securing a flash memory block in a secure device system involves cryptographic techniques including the generation of a Message Authentication Code (MAC). The MAC may be generated each time a file is saved to one or more data blocks of a flash memory device and stored with the file's metadata and to each of the data blocks. A technique for reading and storing versioned files may be employed when applications utilize versioning.
Abstract:
An electronic banking toy is provided. The toy may include a housing defining a storage compartment with an adjoining slot for depositing coins. A controller may display graphical and auditory representations of activities on a display screen based on the sensed location of an icon moveably mounted in a track.
Abstract:
The present disclosure provides for electronic playsets and components thereof. An electronic playset (10) of the present disclosure may include a see-through monitor (14) having a transparent screen (58) configured to display an animated image (62) superimposed over one or more regions. The see-through monitor (14) may be moveable by rotation or translation between one or more positions, the one or more positions being adjacent to the one or more regions. Some embodiments include a see -through monitor (14) with a light source (60) configured to illuminate the one or more regions. Another aspect of the present disclosure provides for a removable toy (86) having an identifiable accessory (88) that may be read by an electronic playset (10). The playset (10) may be configured to identify the removable toy (86) and display an animated image (62) based on the identity.
Abstract:
A technique for securing a flash memory block in a secure device system involves cryptographic techniques including the generation of a Message Authentication Code (MAC). The MAC may be generated each time a file is saved to one or more data blocks of a flash memory device and stored with the file's metadata and to each of the data blocks. A technique for reading and storing versioned files may be employed when applications utilize versioning.
Abstract:
The invention provides methods for preparing a stable, multiple-use three enzyme biosensor for the amperometric determination of creatinine in biological liquids that has a useful lifetime that extends significantly beyond that of presently available amperometric biosensors. The biosensor prepared by the methods of the invention encompasses a plurality of immobilized enzymes that are applied to the biosensor as an enzyme-polymer composition. The enzymes, which can include creatinine amidohydrolase, creatine amidinohydrolase and sarcosine oxidase, are immobilized into the enzyme-polymer composition simultaneously as well as applied to the biosensor simultaneously. Prior to being immobilized, the enzymes can be chemically modified by attaching one or more polyethylene glycol (PEG) chains per enzyme monomer. The polymer component can be provided by a polyurethane membrane. The invention also provides a method of preparing a biosensor that limits the diffusion of silver ions emanating the reference electrode, thereby preventing, contact between the silver ions and the enzymes. Related methods of preparing an enzyme-polymer composition for incorporation into a multiple use three enzyme biosensor for the amperometric determination of creatinine in biological liquids also are provided. The invention also provides multiple-use biosensors and enzyme-polymer compositions prepared by the methods disclosed.
Abstract:
The present disclosure provides for electronic playsets and components thereof. An electronic playset (10) of the present disclosure may include a see-through monitor (14) having a transparent screen (58) configured to display an animated image (62) superimposed over one or more regions. The see-through monitor (14) may be moveable by rotation or translation between one or more positions, the one or more positions being adjacent to the one or more regions. Some embodiments include a see -through monitor (14) with a light source (60) configured to illuminate the one or more regions. Another aspect of the present disclosure provides for a removable toy (86) having an identifiable accessory (88) that may be read by an electronic playset (10). The playset (10) may be configured to identify the removable toy (86) and display an animated image (62) based on the identity.
Abstract:
An electronic banking toy is provided. The toy may include a housing defining a storage compartment with an adjoining slot for depositing coins. A controller may display graphical and auditory representations of activities on a display screen based on the sensed location of an icon moveably mounted in a track.
Abstract:
A pouch laminator and a method for operating the laminator are disclosed. The laminator includes a pouch feeding device for moving a lamination pouch along a pouch-conveying path from an inlet toward an outlet; and a heating chamber (57) comprising at least two pairs of hot rollers (50-53) with heating elements (60,61) mounted between the rollers (50-53). In another aspect the laminator includes an optical transmissivitiy measuring apparatus (25,27) disposed at the inlet of the laminator for discriminating a high and low optical transmissivity of the leading edge (46) of the pouch (19); a pouch detector (10) provided at the inlet to measure the thickness of two films (45) of the pouch (19); and a monitoring system checking the progress to mitigate or avoid jamming when pouches pass through the laminator. The method includes: detecting the correct orientation of the pouch (19) or measuring the thickness of the two films (45) of the pouch (19), then mitigating or avoiding jamming when pouches pass through the laminator according to the abnormal signal from the measuring apparatus (25,27) or detector (10).
Abstract:
The invention provides methods for preparing a stable, multiple-use three enzyme biosensor for the amperometric determination of creatinine in biological liquids that has a useful lifetime that extends significantly beyond that of presently available amperometric biosensors. The biosensor prepared by the methods of the invention encompasses a plurality of immobilized enzymes that are applied to the biosensor as an enzyme-polymer composition. The enzymes, which can include creatinine amidohydrolase, creatine amidinohydrolase and sarcosine oxidase, are immobilized into the enzyme-polymer composition simultaneously as well as applied to the biosensor simultaneously. Prior to being immobilized, the enzymes can be chemically modified by attaching one or more polyethylene glycol (PEG) chains per enzyme monomer. The polymer component can be provided by a polyurethane membrane. The invention also provides a method of preparing a biosensor that limits the diffusion of silver ions emanating the reference electrode, thereby preventing, contact between the silver ions and the enzymes. Related methods of preparing an enzyme-polymer composition for incorporation into a multiple use three enzyme biosensor for the amperometric determination of creatinine in biological liquids also are provided. The invention also provides multiple-use biosensors and enzyme-polymer compositions prepared by the methods disclosed.