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The original TI-30. The TI-30 is a scientific calculator manufactured by Texas Instruments, the first model of which was introduced in 1976.While the original TI-30 was discontinued in 1983 after several design revisions, TI maintains the TI-30 designation as a branding for its low and mid-range scientific calculators.
Conversion from the green to red form depends on the presence of a histidine in the first position of the tripeptide HYG that forms the chromophore. When this histidine residue is substituted with M, S, T or L, Eos only emits bright green light and no longer acts as a photoconvertible fluorescent protein.
An artist's depiction of a 2000s-era desktop-style personal computer, which includes a metal case with the computing components, a display and a keyboard (mouse not shown). A personal computer, often referred to as a PC, is a computer designed for individual use. [1]
A large number of prefabricated novelty items and simple kits could be found through the 1950s and 1960s, and many children with an interest in electronics built one. Building crystal radios was a craze in the 1920s, and again in the 1950s. Recently, hobbyists have started designing and building examples of the early instruments. Much effort ...
A diving regulator or underwater diving regulator is a pressure regulator that controls the pressure of breathing gas for underwater diving.The most commonly recognised application is to reduce pressurized breathing gas to ambient pressure and deliver it to the diver, but there are also other types of gas pressure regulator used for diving applications.
According to a 2023 study, in the early 1990s annual water flows into the canal from the reservoir reached 3.5 km 3, but a more economical use of water reduced this to 1.5 km 3, of which 0.5 km 3 were used in the Kherson Oblast and 1.0 km 3 in Crimea.
They get into a heated argument about the secret fund, which prompts Mary to take Sheldon and Missy to live with Connie for a while. She buys Sheldon the computer to make a point to George. While Sheldon is initially thrilled, he finds that its ELIZA psychotherapy program's advice on fixing his parents' marriage proves to be useless.