cyclic strain
1Angle strain — The presence of angle strain in a molecule indicates that in a specific chemical conformation there exist bond angles that deviate from the ideal bond angles required to achieve maximum bond strength. Maximum bond strength results from effective… …
2Ring strain — is an organic chemistry term that describes the destabilization of a cyclic molecule such as a cycloalkane due to the non favorable high energy spatial orientations of its atoms. Non cyclic molecules do not exhibit ring strain because their… …
3Prelog strain — In organic chemistry, transannular strain or Prelog strain (named after Vladimir Prelog) is the unfavorable interaction of transannular protons in 7 12 membered cyclic molecules resulting in increased ring strain. External links # Prelog strain… …
4Constantan — is a copper nickel alloy usually consisting of 55% copper and 45% nickel.[1] Also known as Eureka. Its main feature is its resistivity which is constant over a wide range of temperatures. Other alloys with similarly low temperature coefficients… …
5Strength of materials — Internal force lines are denser near the hole, a common stress concentration In materials science, the strength of a material is its ability to withstand an applied stress without failure. The applied stress may be tensile, compressive, or shear …
6Fatigue (material) — Metal fatigue redirects here. For the video game, see Metal Fatigue (disambiguation). v · d · e Materials failure modes …
7Soil liquefaction — describes the behavior of loose saturated unconsolidated soils, i.e. loose sands, which go from a solid state to have the consistency of a heavy liquid, or reach a liquefied state as a consequence of increasing porewater pressures, and thus… …
8hydrocarbon — hydrocarbonaceous, adj. /huy dreuh kahr beuhn, huy dreuh kahr /, n. any of a class of compounds containing only hydrogen and carbon, as an alkane, methane, CH4, an alkene, ethylene, C2H4, an alkyne, acetylene, C2H2, or an aromatic compound,… …
9Lac operon — The lac operon is an operon required for the transport and metabolism of lactose in Escherichia coli and some other enteric bacteria. It consists of three adjacent structural genes, a promoter, a terminator, and an operator. The lac operon is… …
10Hyperconjugation — In organic chemistry, hyperconjugation is the interaction of the electrons in a sigma bond (usually C–H or C–C) with an adjacent empty (or partially filled) non bonding p orbital or antibonding π orbital or filled π orbital, to give an extended… …
