Oxidation terms Links

The way to think of them all is as Si04 tetrahedra (or, in polymer terms, monomers) linked to each other either directly or via a metal ion (M) link. When silica is combined with metal oxides like MgO, CaO or AI2O3 such that the ratio MO/SiOj is 2/1 or greater, then the resulting silicate is made up of separated Si04 monomers (Fig. 16.4a) linked by the MO molecules. (Olivene, the dominant material in the Earth s upper mantle, is a silicate of this type.)... 

Chapman et al. [131] reported the synthesis of poly(ethylene oxide) (PEO) supported dendritic f-BOC-poly(a, c-L-lysines). These dendritic polymers termed as hydramphiphiles formed foams possessing good temporal stability in aqueous solution. Scrimin et al. [132] synthesized a three-directional polypeptide having uses in membrane permeability modulation. Decapeptide fragments were linked to TREN [tris(2-aminoethyl)amine] core. 

Study of fhe mechanism of MeOH oxidation over Pt and PtRu surfaces has recenfly been given new insights using a combination of experimental and theoretical approaches. The use of electrochemically linked mass spectroscopy techniques (e.g., differential electrochemical mass spectroscopy— DBMS) has allowed the quantification of the MeOH oxidation reaction in terms of comparing CO2 yields with electrons passed. In addition, detection and quantification of reaction intermediates has also been demonstrated. In addition, use of theorefical fechniques such as DFT has allowed calculation of adsorbafe energies, probing reaction pathways, and activation of H2O to provide active OH species. 

We need a few words about the disulfide bonds that link the two chains of insulin. The side chain of Cys is —CH2—SH. The —SH group is termed the sulfhydryl group. If two of these side chains come together, the sulfhydryl groups can be linked together (oxidized) to form a disulfide bond ... 

The degradation of the fatty acids occurs in the mitochondrial matrix through an oxidative cycle in which C2 units are successively cleaved off as acetyl CoA activated acetic acid). Before the release of the acetyl groups, each CH2 group at C-3 of the acyl residue (the P-C atom) is oxidized to the keto group— hence the term p-oxidation for this metabolic pathway. Both spatially and functionally, it is closely linked to the tricarboxylic acid cycle (see p. 136) and to the respiratory chain (see p. 140). 

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