ion pair
31SN2 reaction — The SN2 reaction (also known as bimolecular nucleophilic substitution) is a type of nucleophilic substitution, where a lone pair from a nucleophile attacks an electron deficient electrophilic center and bonds to it, expelling another group called …
32Stopping power (particle radiation) — In passing through matter, fast charged particles ionize the atoms or molecules which they encounter. Thus, the fast particles gradually lose energy in many small steps. Stopping power is defined as the average energy loss of the particle per… …
33organosulfur compound — ▪ chemical compound Introduction also spelled organosulphur compound , also called organic sulfur compound a subclass of organic substances that contain sulfur and that are known for their varied occurrence and unusual properties. They are… …
34Heavy Rydberg system — A heavy Rydberg system consists of a weakly bound positive and negative ion orbiting their common centre of mass. Such systems share many properties with the conventional Rydberg atom and consequently are sometimes referred to as heavy Rydberg… …
35alkaline-earth metal — /al keuh luyn errth , lin /, Chem. any of the group of bivalent metals including barium, radium, strontium, calcium, and, usually, magnesium, the hydroxides of which are alkalis but less soluble than those of the alkali metals. [1900 05] * * * ▪… …
36SN1 reaction — The SN1 reaction is a substitution reaction in organic chemistry. SN stands for nucleophilic substitution and the 1 represents the fact that the rate determining step is unimolecular [ L. G. Wade, Jr., Organic Chemistry , 6th ed.,… …
37Ikaite — is the mineral name for the hexahydrate of calcium carbonate, CaCO3·6H2O. Ikaite is colorless when pure. DistributionIt is usually considered a rare mineral, but this is likely due to difficulty in preserving samples. It was first discovered in… …
38MicroMegas detector — The “Micromegas “ (Micro MEsh Gaseous Structure) detector is a gaseous particle detector coming from the development of wire chamber. Invented in 1992[1] by Georges Charpak and Ioannis Giomataris, the Micromegas detectors are mainly used in… …
39Bisulfite sequencing — Figure 1: Outline of bisulfite conversion of sample sequence of genomic DNA. Nucleotides in blue are unmethylated cytosines converted to uracils by bisulfite, while red nucleotides are 5 methylcytosines resistant to conversion …
40Liquid-liquid extraction — Liquid liquid extraction, also known as solvent extraction and partitioning, is a method to separate compounds based on their relative solubilities in two different immiscible liquids, usually water and an organic solvent. It is an of a substance …
