Natural Aging of Non-Energized Aluminum Conductors
This paper reports the results of a photographic and electrical study of the mechanism by which a new aluminum conductor ages. A systematic approach of monitoring the aging process revealed the movement of water drop location from the top of a new conductor to the bottom of an aged conductor. Through photographic water drop analysis and electrical test results it has been determined that an aluminum conductor, even though not energized, is essentially aged in 4 to 7 months in the environment of northern Indiana, USA. A seasonal effect was found to add up to 5 months to this period.
Investigation of the corona performance of conductor bundles for 800-kV transmission
An investigation of the corona performance of several different conductor bundles for 765/800-kV transmission lines was carried out under a program jointly sponsored by Consumers Power Company and The Detroit Edison Company. The results of tests, carried out on single-phase bundles of 3, 4, 5, and 6 conductors, are presented in the form of generation quantities of audible noise, radio interference, and corona loss. The influence of bundle asymmetry and conductor surface condition on generation quantities was investigated. A comparison of the expected performance of 3- phase transmission lines using several of the tested bundles is given.
Concentration of amino acids in wine after the end of fermentation by Saccharomyces cerevisiae strains
Both quantitative and qualitative differences in the utilization and release of assimilable nitrogen by two wine strains of Saccharomyces cerevisiae (cerevisiae and capensis) under different conditions of oxygen were observed. These differences were influenced by the presence of oxygen at the beginning of the fermentation, and by the strain of S cerevisiae. The release of some amino acids post-fermentation may be the result of reoxidation of NAD(P)H in order to maintain a normal redox balance. Copyright © 2003 Society of Chemical Industry