open-tube technique
1Closed tube — In the field of acoustics, a tone is created by the periodic vibrations of air applied to a resonator. There are several ways in music to create such vibrations. One of these is to use a closed tube and to blow across the end. This creates a… …
2Vacuum tube — This article is about the electronic device. For experiments in an evacuated pipe, see free fall. For the transport system, see pneumatic tube. Modern vacuum tubes, mostly miniature style In electronics, a vacuum tube, electron tube (in North… …
3Aseptic technique — refers to a procedure that is performed under sterile conditions. This includes medical and laboratory techniques, such as with microbiological cultures.Medical proceduresAseptic technique is the effort taken to keep patients as free from… …
4Transcendental Meditation technique — This article is about the technique. For the movement, see Transcendental Meditation movement. The Transcendental Meditation technique is a specific form of mantra meditation[1] often referred to as Transcendental Meditation. It was introduced in …
5tunnels and underground excavations — ▪ engineering Introduction Great tunnels of the world Great tunnels of the worldhorizontal underground passageway produced by excavation or occasionally by nature s action in dissolving a soluble rock, such as limestone. A vertical opening …
6Chromatography — Pictured is a sophisticated gas chromatography system. This instrument records concentrations of acrylonitrile in the air at various points throughout the chemical laboratory. Chromatography (from Greek χρῶμα chroma color and γράφειν graphein to… …
7sound — sound1 soundable, adj. /sownd/, n. 1. the sensation produced by stimulation of the organs of hearing by vibrations transmitted through the air or other medium. 2. mechanical vibrations transmitted through an elastic medium, traveling in air at a… …
8Sound — /sownd/, n. The, a strait between SW Sweden and Zealand, connecting the Kattegat and the Baltic. 87 mi. (140 km) long; 3 30 mi. (5 48 km) wide. Swedish and Danish, Oresund. * * * I Mechanical disturbance that propagates as a longitudinal wave… …
9separation and purification — ▪ chemistry Introduction in chemistry, separation of a substance into its components and the removal of impurities. There are a large number of important applications in fields such as medicine and manufacturing. General principles… …
10Jack Lynch Tunnel — The Jack Lynch Tunnel (named after the former Taoiseach Jack Lynch), or Tollán Seán Ó Loinsigh in Irish, is an immersed tube tunnel and an integral part of the N25 southern ring road of Cork in Ireland. It takes the road under the River Lee.… …
