Effect of short‐term anaerobic conditions on the production of volatiles,activity of alcohol acetyltransferase and other quality traits of ripened bananas. Sumithra K Wendakoon. Yoshinori Ueda. Yoshihiro Imahori. Megumi Ishimaru. Journal of the Science of Food and Agriculture, 2006; 86: 1475–1480

The original article to which this Erratum refers was published in Journal of the Science of Food and Agriculture, 2006; 86: 1475–1480.     

Magnesium and lanthanide ions promoted electrochemical coupling of aliphatic esters and tetrahydrofuran for the synthesis of acetals

Electroreduction of aliphatic esters in THF was found to be promoted by the catalytic amount of porphine-magnesium(II) complexes and afforded 2-alkoxytetrahydrofuran derivatives, the coupling products between alkoxide anions formed by the electroreduction of aliphatic esters and THF cation generated by the anodic oxidation of the solvent (THF). In this reaction, chlorophyll a extracted from Trifolium repens L was remarkably effective. In addition, lanthanide metal(III) ions such as samarium trichloride were also found to be effective for the electroreduction of aliphatic esters.     

Gas discrimination method for detecting transformer faults by neural network

This paper describes a method available for early detection of abnormality in an oil-filled transformer. In this method, four gas sensors having different characteristics and neural network are used to identify gas species (H₂, CH₄, C₂H₄, C₂H₂ and mixture of two species). To improve the selectivity of gas sensors, the time response patterns induced by changing sensor temperature and the stationary sensor output are identified by neural network. Furthermore, the mixture ratio of gases is derived by using the stationary sensor output in response to the changing sensor temperature. Gas species are well discriminated, and the mixture ratio derived from the sensor output agrees well with the measurement by gas chromatography. Therefore, it is confirmed that our method is applicable to the transformer diagnostic technology.     

Photoresponsive Crown Ethers. Part 11. Azobenzene-Pillared Cylindrical Macrocycle As a Photoresponsive Receptor

A cylindrical ionophore (1) in which two diaza-crown ethers are linked by two azobenzene pillars serves as a photoresponsive host molecule. In alkaline solution containing K⁺, (1) forms a cascade complex with dianionic guest molecules, but photoirradiated (1) which has a shortened cylinder cannot bind the guest molecules so effectively as (1). (1) solubilised in acidic aqueous solution by protonation of four tertiary nitrogens provides a hydrophobic cavity to bind several anionic azo dyes. The association is also suppressed by photoirradiation. The results indicate that parallel array of the azobenzene segments in (1) provides a host cavity and the photoinduced structural change is readily reflected by the association tendency. This is the first example for the photoresponsive inclusion complex.     

Development of a 275-kV liquid cooling-type gas-insulated transformer

Construction of 275-kV and 500-kV substations in densely populated areas is thought to be necessary in the future to maintain a stable supply of electricity. The use of gas-insulated transformers is now considered for substations because such transformers are non-flammable and nonexplosive. Since the completion of the 77-kV gas-insulated transformer in 1979, we have continued research to develop gas-insulated transformers applicable to a higher voltage level up to 500 kV. As the results of the research, 275-kV, 300-MVA a liquid cooling-type gas-insulated transformer has been developed.     

Mechanical properties of an aromatic polyamide-imide composite film reinforced with an aromatic polyamide fiber cloth at high temperature

An aromatic polyamide-imide (PAI) film was reinforced with a plain cloth of aromatic polyamide fiber (Du Pont, Kevlar 49). The mechanical properties of the composite film were investigated by examination of the temperature dependencies of tensile dynamic mechanical properties, stress relaxation, and tensile stress-strain behaviors. The softening temperature of the composite film was lower than that of a homogeneous PAI film. At a high temperature, Kevlar fibers may act as a thermal conductor and lower the softening point of the PAI composite. The mechanical properties of the composite film at a high temperature are mostly controlled by the PAI matrix.