摘要:
Particles of compound useful in imaging elements are milled using a milling media comprising a polymeric resin. The use of polymeric milling media permits the production of particles having an average particle size less than 1 micron. Further, the resulting particles are free from the contamination resulting from conventional milling media of, for example, glass, ceramic or steel.
摘要:
Photographic assemblages are described wherein a stripping layer is employed to enable an image-receiving layer to be separated from the rest of the assemblage after processing. A reflecting layer is employed between the image-receiving layer and a transparent support. During processing, the wet reflecting layer is sufficiently transparent to permit transmission viewing of the image through the transparent support. After stripping, the reflecting layer dries to provide a reflective surface for viewing the image from the opposite direction.
摘要:
Dispersible particles consisting essentially of a crystalline drug substance having a surface modifier adsorbed on the surface thereof in an amount sufficient to maintain an effective average particle size of less than about 400 nm, methods for the preparation of such particles and dispersions containing the particles. Pharmaceutical compositions containing the particles exhibit unexpected bioavailability and are useful in methods of treating mammals.
摘要:
An object of the invention is to overcome disadvantages of prior practices. A further object of the invention is to provide a process for providing particles that result in improved UV absorption in photographic products.An additional object is to provide lower cost polymer particle dispersions.The invention is generally accomplished by mechanically grinding a crystalline material to a desired particle size in a liquid that is not a solvent for the material, heating said crystalline particles dispersed in said liquid to above their melting temperature, and cooling the melted particles in said liquid to form amorphous particles. In preferred forms of the invention, the material is a photographically useful material, such as ultraviolet light absorber or coupler.
摘要:
A dispersion consisting essentially of magnetic particles, a dialkylester of phthalic acid which functions as a dispersing medium, and optionally, a dispersing agent is particularly useful as a precursor to a composition suitable for casting onto a cellulose acid ester support film to form a transparent magnetic recording layer for use in photographic films. The dispersion provides magnetic recording layers exhibiting fewer particle agglomerations and reduced light scattering and photographic prints prepared from films containing such magnetic layers exhibit virtually no increase in graininess attributable to the magnetic recording layer.
摘要:
Two-sheet diffusion transfer assemblages and photographic elements are described which contain a primer layer located between a polymeric acid layer and a timing layer. The primer layer prevents unwanted transfer of portions of the emulsion layer to the receiver when the receiver and photographic element are peeled apart. The primer layer comprises:(a) a mixture of gelatin and cellulose nitrate, or(b) a mixture of an acrylic acid copolymer and a particular acrylic acid terpolymer, or(c) an acrylic acid copolymer as described herein.
摘要:
An air supported play structure that may be configured into a large variety of forms and shapes. An expanse of air-permeable fabric is weighted around its edges, and the fabric is supported above a surface by a stream of air supplied by a fan. A plurality of connectors are attached to the fabric, and those connectors are arranged to allow any one connector to be secured to another connector. The geometric configuration of the play structure is altered by changing the position of the edge weights, and by selecting the connectors to be secured one to another.
摘要:
The present invention provides method and apparatus to continuously operate a bead mill. At the outlet of the bead mill is a separator screen which prevents particles of a certain size from being discharged. After running the bead mill, the screen tends to get clogged with large sized particles. The present invention provides an ultrasonic probe that periodically cleans the screen when the pressure within the milling chamber reaches a predetermined value.
摘要:
A dye-providing composition comprises a water-soluble or -dispersible polymer, such as a vinylpyrrolidone polymer, and an imidazole leuco dye capable of providing a dye in the presence of hydrogen peroxide and a peroxidative substance. The weight ratio of polymer to leuco dye is from about 10,000:1 to about 100:1. The dye-providing composition can be included with a peroxidase substrate in a diagnostic test kit. A method for the determination of a ligand can be carried out using a peroxidase labeled-receptor for the ligand and the dye-providing composition described above. The method is particularly useful for the determination of human chorionic gonadotropin (hCG).