Studies on the proteins of the mutants of barley grain. 2. Fractionation and characterization of the alcohol-soluble proteins

Fractionation and characterization of the alcohol-soluble proteins of a barley variety, its mutants, and Hiproly, a high-protein and high-nutritive barley isolated from the world barley collection, indicate quantitative and qualitative changes in the mutants. The 35 % ethanol-soluble subfraction is higher in proportion in the mutants and Hiproly, and this could have resulted from the higher proportions\ud of the polar amino acids in these proteins among which are also some limiting amino acids like lysine and threonine. The digestibility, as observed by the in vitro procedure, of this subfraction in all the varieties also is higher and, presumably as a result, the hordein fraction of these mutants also shows better digestibility. It appears that, in view of the presence of more polar amino acids which include lysine in this subfraction and better digestibility, its enrichment could be a nutritionally favorable index of better grain quality

The laboratory millimeter and submillimeter spectrum of HCO

The rotational absorption frequencies of 68 new lines from the HCO radical in its ground electronic state have been measured in the millimeter and submillimeter spectral region. The large zero-field data set acquired has allowed the complex spectrum of this light asymmetric rotor with unpaired electronic spin and magnetic hyperfine interactions to be completely analyzed to within experimental accuracy (<0.1 MHz) for the first time. The wide range of states observed provides a highly accurate map of the rotational frequencies of the formyl radical, which should enable the abundance and excitation of interstellar HCO to be examined in detail

Foam-based synthesis of cobalt nanoparticles and their subsequent conversion to Co<SUB>core</SUB>Ag<SUB>shell</SUB> nanoparticles by a simple transmetallation reaction

Cobalt nanoparticles have been synthesized via a novel, foam-based protocol. The foam is formed from an aqueous mixture of Co2+ ions, an anionic surfactant and oleic acid where the cobalt ions are electrostatically entrapped by the surfactant at the thin borders between the foam bubbles and their junctions. The entrapped cobalt ions may be reduced in-situ by a moderately strong reducing agent resulting in the formation of nanoparticles with the foam playing the role of a template. The nanoparticles are immediately capped and stabilized against oxidation by oleic acid present in the foam matrix. The oleic acid-capped Co nanoparticles can be redispersed either in an aqueous or organic medium making this procedure very attractive. The cobalt nanoparticles are readily converted to CocoreAgshell nanoparticles by simple addition of a silver salt to the Co nanoparticle solution, the cobalt atoms on the nanoparticle surface acting as localized reducing agents for the silver ions