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Laminate device for the controlled long-term delivery of substances to an ambient environment, and their use for the control of helminthiasis in ruminant animals
Laminate device for the controlled long-term delivery of substances to an ambient environment, and their use for the control of helminthiasis in ruminant animals
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机译:用于控制物质向周围环境的长期长期输送的层压设备,及其在反刍动物中控制蠕虫病的用途
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摘要
Laminate device for the controlled and prolonged release of at least one active agent to an ambient environment comprising at least one core sheet, said core sheet or sheets comprising said agent or agents in a polymer matrix, and, in a preferred embodiment, a porosity enhancing agent in admixture with said agent; said core sheet or sheets being alternately sandwiched or interposed between coextensive inert polymeric films substantially impermeable to said environment and to said agenit or agents, said device being perforated by one or a plurality of macroholes extending through said sheets and said films. In a modification of said device the perimeter edge thereof is coated by an inert polymeric film substantially impermeable to said environment and to said agent or agents. Also included are methods for making such a device.
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