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from article Bioelectronics

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Schematic representation of the essential features of a typical biosensor. (After I. J. Higgins and C. R. Lowe, Introduction to the principles and applications of biosensors, Phil. Trans. Roy. Soc. Lond., B316:3–11, 1987)

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from article Bioelectronics

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Configuration of a thin-film glucose biosensor, (a) front view and (b) side view, and glucose oxidaseimmobilized poly(vinyl alcohol) membranes. (After T. Moriizumi, Solid state biosensors, Proceedings of International Symposium on Future Electron…

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from article Bioelectronics

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Calibration curve for glucose of the thin-film biosensor at pH 7.0 and 37°C (98.6°F). (After T. Moriizumi, Solid state blosensors, Proceedings of International Symposium on Future Electron Devices, Tokyo, pp. 73–80, 1985)

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from article Ecdysone

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Structure of 20-hydroxy-ecdysone.

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from article Ecdysone

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Drawing of postulated mechanism of action of ecdysone in protein production in the midge Chironomus.

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from article Telephone service

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National long-distance telephone network of the early 1980s, which introduced common-channel interoffice signaling (CCIS) to speed call completions, using 14 special packet switches called signal transfer points. Regional, sectional, primary, and…

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from article Telephone service

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National long-distance telephone network of the early 1990s, which uses common-channel Signaling System 7 technology. Signal transfer points serve local switches as well as the long-distance network with out-of-band access to various data banks, and…

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from article Telephone service

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Caller identification service in Signaling System 7, whereby call waiting identifies the caller's name and directory number for waiting calls. Broken lines indicate SS7 links. (AT&T)

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