Annealing-induced interfacial toughening using a molecular nanolayer

Article Abstract:

The self-assembled molecular nanolaydsers (MNLs) are harnessed at thin-film interfaces at temperatures higher than the MNL desorption temperature in order to fortify copper-dielectric interfaces relevant to wiring in micro- and nano-electronic devices. Results show that the toughening arises from thermally activated interfacial siloxane bridging enabling the MNL to be strongly linked to both the adjacent layers at the interface and suppress MNL desorption.

All Other Basic Inorganic Chemical Manufacturing, Primary copper, Industrial inorganic chemicals, not elsewhere classified, Industrial sand, Silica & Silica Sand, Industrial Sand Mining, Silicon Dioxide, Secondary nonferrous metals, Usage, Design and construction, Electric properties, Silica, Monomolecular films, Copper, Density functionals, Density functional theory, Copper (Metal), Atomic properties, Report

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Molecular characterization of eukaryotic polysialyltransferase-1

Article Abstract:

Experimental studies on polysialyl transferase-1, a vital enzyme of eukaryotic polysialic acid (PSA) synthesis, reveal that PSA synthesis in cell lines expressing neural cell adhesion molecule is induced by this enzyme. A single enzymatic activity is responsible for the polycondensation of alpha 2,8-linked sialic acids in mammals. Experimental data help understand the importance of PSA in neuro- and tumor biology.

Research, Transferases, Sialic acids

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Molecular cannibalism

Article Abstract:

The biosynthesis of vitamin [B.sub.12] is common knowledge to scientists, but the origins of a fragment of the vitamin called dimethylbenzimidazole (DMB) ligand was unknown earlier. A study identifies the enzyme BluB, responsible for DMB biosynthesis through a process of molecular cannibalization or destruction of vitamin [B.sub.2], and also describes its structure.

Analysis, Biosynthesis, Chemical properties, Vitamin B12

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