angle coupling
81Imagerie par résonance magnétique — Pour les articles homonymes, voir IRM et MRI. L imagerie par résonance magnétique (IRM) est une technique d imagerie médicale permettant d obtenir des vues 2D ou 3D de l intérieur du corps de façon non invasive avec une résolution relativement… …
82Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… …
83Alpha helix — A common motif in the secondary structure of proteins, the alpha helix (α helix) is a right handed coiled conformation, resembling a spring, in which every backbone N H group donates a hydrogen bond to the backbone C=O group of the amino acid… …
84Antenna (radio) — Whip antenna on car …
85USS Houston (SSN-713) — USS Houston (SSN 713), a Los Angeles class submarine, was the fourth ship of the United States Navy to be named for Houston, Texas. The contract to build her was awarded to Newport News Shipbuilding and Dry Dock Company in Newport News, Virginia… …
86Carbon-13 NMR — (13C NMR or sometimes simply referred to as carbon NMR) is the application of nuclear magnetic resonance (NMR) spectroscopy to carbon. It is analogous to proton NMR (1 H NMR) and allows the identification of carbon atoms in an organic molecule… …
87Gauge theory — For a generally accessible and less technical introduction to the topic, see Introduction to gauge theory. In physics, a gauge theory is a type of field theory in which the Lagrangian is invariant under a continuous group of local transformations …
88Su Song — 蘇頌 (Sū Sòng) Born 1020 near Quanzhou Died 1101 (aged 80–81) Nationality Chinese …
89Nikon F2 — Photomic (DP 1 prism) Type 35 mm SLR camera Lens mount Nikon F mount Focus manual Exposure manual …
90Piping and plumbing fittings — Fittings are used in pipe and plumbing systems to connect straight pipe or tubing sections, to adapt to different sizes or shapes, and to regulate fluid flow, for example. Fittings, especially noncommon types, can be expensive, and require time,… …
