The processing of carbon nanotubes (CNTs) remains a significant barrier in the exploitation of their unique properties. CNT dispersions have been achieved by noncovalent modification using surfactants and polymers with aromatic functionalities that assemble onto nanotube surfaces via p–p interactions. Synthetic aromatic ligands, such as pyrene and its derivatives, have also been used as low-cos...

Aromatic amino acids act as precursors of various low molecular weight (<1kDa) antimicrobial compounds including hydroxy acids such as phenyllactic acid, hydroxyphenyllactic acid, indolelactic acid, alcohols such as phenylethyl alcohol for example and others. These metabolites are known to play an important role in biopreservation of fermented food products as cheese, beer, sourdough, fermented...

The Tagish Lake meteorite fell last year on a frozen lake in Canada and may provide the most pristine material of its kind. Analyses have now shown this carbonaceous chondrite to contain a suite of soluble organic compounds (approximately 100 parts per million) that includes mono- and dicarboxylic acids, dicarboximides, pyridine carboxylic acids, a sulfonic acid, and both aliphatic and aromatic...

In certain microorganisms, shikimic acid has been shown to be a precursor for the biosynthesis of aromatic amino acids (1). Tracer experiments with cell-free extracts of Escherichia coli have revealed that shikimic acid is formed from uniformly labeled glucose (2). In view of the reports (3) of the biosynthesis of aromatic amino acids from glucose in infant mouse brain, an investigation was beg...

The binding of lysine model peptides of the type Lys-X-Lys, Lys-X-X-Lys and Lys-X-X-X-Lys (X = different aliphatic and aromatic amino acids) has been studied by equilibrium dialysis. It was shown that the strong electrostatic binding forces generated by protonated amino groups of lysine can be distinguished from the weak forces stemming from neutral and aromatic spacer amino acids. The overall ...

Transformation of aromatic thioesters into arylboronic esters was achieved efficiently using a rhodium catalyst. The broad functional-group tolerance and mild conditions of the method have allowed for the two-step decarboxylative borylation of a wide range of aromatic carboxylic acids, including commercially available drugs.

I. S 24 perennial ryegrass was harvested at six stages of its growth from young leafy herbage to mature grass in which the seed had shed. 2. Two sheep were offered Ikg/d of each cut and two other sheep were offered 750 g/d of each cut of grass. 3. The contents of some possible precursors of the urinary aromatic acids excreted by sheep, namely, shikimic acid, quinic acid, chlorogenic acid, total...

Atmospheric aerosols often contain a substantial fraction of organic matter, but the role of organic compounds in new nanometer-sized particle formation is highly uncertain. Laboratory experiments show that nucleation of sulfuric acid is considerably enhanced in the presence of aromatic acids. Theoretical calculations identify the formation of an unusually stable aromatic acid-sulfuric acid com...

The organocatalytic behavior of N-heterocyclic carbenes in the aerobic oxidation of aromatic aldehydes to esters with boronic acids has been explored. This transition metal-free protocol allows access to a wide variety of aromatic esters in good to excellent yields under mild reaction conditions.

Antioxidants play an important role in inhibiting and scavenging radicals, thus providing protection to humans against infections and degenerative diseases. The present article focuses on the synthesis and antioxidant activity studies of a variety of 2-aryl thiazolidine -4-carboxylic acids. A series of twenty fully characterized 2-aryl thiazolidine-4-carboxylic acids have been synthesized by nu...