Vicinal Diols
Vicinal ''("In the neighbourhood of")'' is a general adjective used as a standard, specific, technical descriptor in a range of contexts, including: * Vicinal (chemistry), stands for any two functional groups bonded to two adjacent atoms. * Vicinal tramway or ''Buurtspoor'', a system of narrow gauge tramways or local railways in Belgium. * In materials science, a "vicinal substrate" is a thin-film substrate whose surface normal deviates slightly from a major crystallographic axis. * In physics, the exclusion zone An exclusion zone is a geographic area in which specific activities are prohibited by an authority. The United States Department of Defense defines an exclusion zone is a territory where an authority prohibits specific activities in a specific g ...

Vicinal (chemistry)
In chemistry the descriptor vicinal (from Latin ''vicinus'' = neighbor), abbreviated ''vic'', is a descriptor that identifies two functional groups as bonded to two adjacent carbon atoms (i.e., in a 1,2-relationship). It may arise from vicinal difunctionalization. Relation of atoms in a molecule For example, the molecule 2,3-dibromobutane carries two vicinal bromine Bromine is a chemical element; it has chemical symbol, symbol Br and atomic number 35. It is a volatile red-brown liquid at room temperature that evaporates readily to form a similarly coloured vapour. Its properties are intermediate between th ... atoms and 1,3-dibromobutane does not. Mostly, the use of the term vicinal is restricted to two identical functional groups. Likewise in a ''gem-''dibromide the prefix ''gem'', an abbreviation of '' geminal'', signals that both bromine atoms are bonded to the same carbon atom (i.e., in a 1,1-relationship). For example, 1,1-dibromobutane is geminal. While comparativel ...
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Vicinal Tramway
The National Company of Light Railways (, abbreviated as NMVB; , abbreviated as SNCV) was a state-owned transportation provider which comprised a system of narrow-gauge tramways or local railways in Belgium, which covered the whole country, including the countryside, and had a greater route length than the mainline railway system. They were and included electrified city lines and rural lines using steam locomotives and diesel railcars; half the system was electrified. The company gradually switched to buses and dismantled the tram tracks. Only the coastal line, the Charleroi light rail system, and the short line to the caves at Han-sur-Lesse are still in commercial use; four museums hold significant collections of rolling stock, including the museum at Schepdaal and the ASVi museum in Thuin. The longest () and oldest (40 years) tourist tramway is the ''Tramway Touristique de l'Aisne'' (TTA), between Érezée and Dochamps. A sponsoring group called "Tramania" has supported var ...
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Thin Film
A thin film is a layer of materials ranging from fractions of a nanometer ( monolayer) to several micrometers in thickness. The controlled synthesis of materials as thin films (a process referred to as deposition) is a fundamental step in many applications. A familiar example is the household mirror, which typically has a thin metal coating on the back of a sheet of glass to form a reflective interface. The process of silvering was once commonly used to produce mirrors, while more recently the metal layer is deposited using techniques such as sputtering. Advances in thin film deposition techniques during the 20th century have enabled a wide range of technological breakthroughs in areas such as magnetic recording media, electronic semiconductor devices, integrated passive devices, light-emitting diodes, optical coatings (such as antireflective coatings), hard coatings on cutting tools, and for both energy generation (e.g. thin-film solar cells) and storage ( thin-film bat ...
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Surface Normal
In geometry, a normal is an object (e.g. a line, ray, or vector) that is perpendicular to a given object. For example, the normal line to a plane curve at a given point is the infinite straight line perpendicular to the tangent line to the curve at the point. A normal vector is a vector perpendicular to a given object at a particular point. A normal vector of length one is called a unit normal vector or normal direction. A curvature vector is a normal vector whose length is the curvature of the object. Multiplying a normal vector by results in the opposite vector, which may be used for indicating sides (e.g., interior or exterior). In three-dimensional space, a surface normal, or simply normal, to a surface at point is a vector perpendicular to the tangent plane of the surface at . The vector field of normal directions to a surface is known as '' Gauss map''. The word "normal" is also used as an adjective: a line ''normal'' to a plane, the ''normal'' component of ...
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Crystallographic
Crystallography is the branch of science devoted to the study of molecular and crystalline structure and properties. The word ''crystallography'' is derived from the Ancient Greek word (; "clear ice, rock-crystal"), and (; "to write"). In July 2012, the United Nations recognised the importance of the science of crystallography by proclaiming 2014 the International Year of Crystallography.UN announcement "International Year of Crystallography"
iycr2014.org. 12 July 2012 Crystallography is a broad topic, and many of its subareas, such as , are themselves important scientific topics. Crystallography ranges from the fundamentals o ...
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