The enthalpies and entropies of fusion and of solid state transitions in Li formate and acetate; Li, Na, K, Rb, Cs propionates; Li, Rb, Cs n.butyrates were determined by differential scanning calorimetry. Supplementary information was provided through conductance measurements on solids. The collected data, together with those from previous papers, allowed to give a picture of the thermal behaviour of the alkali C1-n. C4 alkanoates.
Heat capacity data on solid and molten Na formate, acetate and propionate were also determined
DSC analysis allowed to state (between 110 K and the isotropic melt region) the main phase relationships in Li, Na, K and Rb n.pentanoates, n.hexanoates and n.heptanoates. Clearing (when occurring), fusion and solid state transition (when possible) temperatures, and heat effects were measured. The present data are discussed in comparison with those previously collected on higher (up to n.dodecanoates) and lower homologues
Differential scanning calorimetry was performed between 110 K and the isotropic melt region on potassium «.alka noates from octanoate to dodecanoate. Clearing, melting and (crystalline) solid state transition temperatures and heat effects were measured. In the higher homologues the occur rence of phases (likely "waxy") intermediate between crys talline solid and mesomorphic liquid could also be argued. The phase relationships are discussed in comparison with some roentgenographic and microscopic results of previous authors.
Di-(2-hydroxy-l-phenazinyl)methane, Phenazines, Bacterial Constituents, Pseudomonas aureofaciensThe structure elucidation of di-(2-hydroxy-l-phenazinyl)methane from Pseudomonas aureofaciens is described. In addition to the phenazine derivatives isolated earlier from this bacterium 2,3,4-trihydroxyphenazine-l-carboxylic acid and phenazine-1,6-dicarboxylic acid could be identified.
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