摘要:
A medical device comprising a biomaterial formed from a polymer comprising urethane groups, urea groups, or combinations thereof, and sacrificial moieties that preferentially oxidize relative to other moieties in the polymer.
摘要:
The present invention provides electronically conducting polymer films formed from photosensitive formulations of pyrrole and an electron acceptor that have been selectively exposed to UV light, laser light, or electron beams. The formulations may include photoinitiators, flexibilizers, solvents and the like. These formulations can be used to manufacture multichip modules on typical multichip module substrates, such as alumina, fiberglass epoxy, silicon and polyimide. The formulations and methods of the invention enable the formation of passive electronic circuit elements such as resistors, capacitors and inductors in multichip modules or printed wiring boards.
摘要:
The mechanism includes a pair of gates which are horizontally spaced from one another and which are operable to stroke between inwardly extended and outwardly retracted positions for collecting and dropping the articles, respectively. The gates are mounted on a threaded member for selective horizontal adjustment of the distance between the gates to enable collection of articles of various widths. As an incident to adjusting the distance between the gates, the stroke of the gates is simultaneously adjusted.
摘要:
The present invention provides electronically conducting polymer films formed from photosensitive formulations of pyrrole and an electron acceptor that have been selectively exposed to UV light, laser light, or electron beams. The formulations may include photoinitiators, flexibilizers, solvents and the like. These solutions can be used in applications including printed circuit boards and through-hole plating and enable direct metallization processes on non-conducting substrates. After forming the conductive polymer patterns, a printed wiring board can be formed by sensitizing the polymer with palladium and electrolytically depositing copper.
摘要:
Corrosion inhibitors containing alkanoic, hydrocarbyl dicarboxylic and carbocyclic-substituted, alkanoic acids or salts give high performance, heat transfer fluids and antifreezes, with improved properties including storage stability.
摘要:
A device for sampling the surface of the skin includes a substrate having a light absorbing area disposed thereon. A layer of adhesive is disposed on the substrate overlying the light absorbing area. The adhesive layer is optically clear and under pressure conforms to the surface of the skin to be sampled. A removable protective film is disposed on the adhesive layer for protecting the adhesive layer prior to use of the device.
摘要:
The crystallographic plane-dependent, amphoteric nature of Si-doped AlGaAs is used to provide a low threshold semiconductor laser. An active layer of AlGaAs is sandwiched between an injection layer and a current confining layer of AlGaAs. The injection layer is doped to be n-type conductivity. The confining layer is amphoterically doped with Si to be n-type in a (100) plane and p-type in a (111)A plane. The resulting p-n junctions, heterostructure, and geometry provide the current and the optical confinement for the semiconductor laser.
摘要:
The crystallization of human leukocyte interferon is described. In a preferred embodiment crystalline recombinant human leukocyte interferon A (IFL-rA) is prepared.