摘要:
An antimicrobial packaging material for food stuffs containing from 0.05% to 1.5% by weight of a natural essential oil. The oil can be selected from primarily linalool and /or methylchavicol, but also from one or more of citral, geraniol, methyl cinnamate, methyl eugenol, 1,8-cineole, trans-a-bergamotene, carvacrol and thymol blended with one or more polymers selected from ethylene vinyl alcohol copolymer, polyacrylates, including ethyl acrylate methyl methacrylate copolymers, lonomers, nylons and other hydrophilic polymers or polymers possessing functional groups capable of partially anchoring the additives and the blender mix is coated onto the food contact face of a food grade packaging film or incorporated into a food grade packaging film. A binding agent such as polyethylene glycol is added to the blend to improve the retention of the volatile oil in the polymer during processing. This material has no regulatory limitations and, at the referred concentrations, does not form detectable off-flavours.
摘要:
Novel attenuated strains of Aeromonas salmonicida are disclosed that are effective as live effective vaccines against furunculosis in fish. These vaccines may be administered by the immersion of fish in a solution of the vaccine. Methods of producing these strains and other strains having the identifying characteristics of these strains are also disclosed.
摘要:
A method of erasable/rewritable optical data storage is provided in which a laser beam from a laser (10) operated in either a pulsed or continuous wave mode is focussed by an optical system (11-18) onto a photorefractive polymeric material (32) to cause two photon excitation of the material to record data which may subsequently be erased by illuminating the material with radiation having a wavelength in the ultraviolet or visible spectrum to erase the recorded data. New photorefractive polymeric materials having a relatively narrow absorption band for use in the method are also disclosed.
摘要:
A gamma ray detector for determining the position of gamma ray interactions has at least one module (1). Each module has a converter (2) for converting gamma rays (3) to charged particles (4), a scintillator (5) for emitting light in response to charged particles produced by the converter, a photodectector (6) to determine when light has been emitted from the scintillator, a two-coordinate position detector (7) for determining the X and Y coordinates of charged particles interacting with the position detector, and a signal device (8) for signaling the presence of emitted light in the photodetector and for activating the position detector.
摘要:
The present invention relates to light guides (1) capable of encoding the transverse and longitudinal coordinates of light emission induced by the interaction of photons in an array of a plurality of the light guides. Each light guide has at least two discrete crystal segments (4) adjacently disposed along a common longitudinal axis of the light guide (1). Between adjacent segments is a boundary layer (7) having less light transmission than the light transmission of the crystal segments (4). A light absorbing mask (8) increases light adsorption in a segment (4). Photons enter the light guide (1) and cause the emission of scintillation light which is delivered in different and resolvable quantities to light sensing devices. The differences in quantity of delivered light is caused by successive decreases in light transmission to light transmitting end (5) caused at least in part by the boundary layers (7). The differences in quantity of light establish the segment from which the light emission took place.
摘要:
The invention provides a method of synthesis of a substituted or unsubstituted carbinol compound, comprising the steps of subjecting the corresponding substituted or unsubstituted aromatic aldehyde to acyloin condensation mediated by yeast in the presence of either (a) a supercritical fluid or (b) a liquefied gas, and recovering the carbinol compound. Preferably the yeast is Saccharomyces cerevisiae . In a particularly preferred embodiment the aromatic aldehyde is benzaldehyde and the carbinol is phenylacetylcarbinol, according to the reaction (I): in which the benzaldehyde, the pyruvic acid, or both may optionally be substituted.