Potential role of bicarbonate during pyrite oxidation

Article Abstract:

The surface-expose atom of pyrite possesses an unshared electron pair that produces a slightly negatively charged pyrite that can attract cations, according to the Frontier molecular orbit theory. The study, which uses Fourier transform infrared spectroscopy (FT-IR), demonstrated that such complexes form on the surface of pyrite and continue to persist even after a significant fraction of the surface Fe2 was oxidized to Fe3+. FT-IR also indicated the presence of two carbonyl absorption bands on the surface of pyrite upon exposure.

Comment:

Surface-expose atom of pyrite has an unshared electron pair that produces a negatively charged pyrite that can attract cations

Other Chemical and Fertilizer Mineral Mining, Pyrites

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Chloroaniline/lignin conjugates as model system for nonextractable pesticide residues in crop plants

Article Abstract:

The optimized methods that are known for chloroaniline/lignin conjugates enable the use of in vitro lignin copolymers as a reference system for the structural features and the bioavailability of nonextractable pesticide residues in crop plants. A wide array of commercially important herbicides contains chlorinated anilines as structural components, such as acylanilide, N-phenylurea and carbamyl. The free chloroaniline, which are formed as primary metabolites, are conjugated in plants resulting in soluble and insoluble conjugates.

Comment:

Optimized methods for chloroaniline/lignin conjugates serve as reference sys for nonextractable pesticide residues in crops

Pesticide and Other Agricultural Chemical Manufacturing, Pesticide Raw Materials, Pesticides

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Greening the clean room

Article Abstract:

Joseph DeSimone, a professor at North Carolna-Chapel Hill and North Carolina State University, has developed spin-coating and removal processes that remove the thin polymer films that serve as masks in the manufacture of semiconductors. This green process is discussed.

Semiconductors and related devices, Semiconductor Devices, Semiconductor and Related Device Manufacturing, Semiconductor industry, Management, Innovations, Brief Article, DeSimone, Joseph

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