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In chromatography, endcapping refers to the replacement of accessible silanol groups in a bonded stationary phase by trimethylsilyl groups. End-capped columns have much lower residual silanol group activity compared to non-endcapped columns. [1]
The cap prevents stitches from coming off the ends of needles. Before it became common for straight needles to have a cap at one end, pairs of "needle guards" made of wood or cork and linked with a spring or leather strip, were used to stop stitches slipping off the needles while not in use.
Hydrothermal circulation in the oceans is the passage of the water through mid-oceanic ridge systems.. The term includes both the circulation of the well-known, high-temperature vent waters near the ridge crests, and the much-lower-temperature, diffuse flow of water through sediments and buried basalts further from the ridge crests. [3]
Bed of Queen Hetepheres I, with headrest (near end). 4th Dynasty of Egypt , circa 2575-2528 B.C. Bed is 177 cm (5ft 9in) long. The 600s (7th-century) Anglo-Saxon Trumpington bed burial held a 60cm by 155cm bed with pieces of looped wrought iron , which may have held the bed base.