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from article Ecdysone
Structure of 20-hydroxy-ecdysone.
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from article Ecdysone
Drawing of postulated mechanism of action of ecdysone in protein production in the midge Chironomus.
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from article Telephone service
Elements of the local telephone network.
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from article Telephone service
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
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
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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from article Telephone service
Virtual private network with international links that must involve service providers of both the United States and other countries. (AT&T)
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from article Homalozoa
Examples of homalozoans. (a, b) Phyllocystis blayaci, an Early Ordovician cornute stylophoran from Morocco. Note heavier, elongate, marginal plates around thin-plated, upper (a) and lower (b), central areas in theca; about half of the attached,…
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from article Tapir
Brazilian or lowland tapir (Tapirus terrestris). (Photo by Brent Huffman; courtesy of Ultimate Ungulate)
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from article Beroida
A beroid, Beroë cucumis.
