two different growth media, namely complex and defined media, were used to examine establishment of steady-state conditions in phosphate-limited culture system of saccharomyces cerevisiae cen.pk113-5d strain. using the defined growth medium, it was possible to obtain steady state condition in the continuous culture. the effect of phosphate concentration on the growth of s. cerevisiae in phospha...

in this study, we assess the impact of oil price changes on the macroeconomic variables of some oil importers in oecd countries, including usa, italian, france and japan during the period 1960-2002. the results for different countries imply asymmetric impact of oil price changes on gdp growth rates; moreover, the results show that monetary shocks are an important and noticeable factor explainin...

Because of the reactivity of oxygen with biologically impor tan t compounds, e.g. unsaturated lipids, SH-conta in ing proteins and cofactors, and redox compounds (see review by Haugaard , 1968), cells in aerobic envi ronments require some mean(s) for protect ion from indiscr iminate oxidation. Since the superoxide free radical, O2, is apparently a major product of the reaction of 02 with reduce...

Most species of Salmonella grow rapidly and luxuriantly on ordinary agar media. In contrast, Salmonella pullorum and a few other species or types such as Salmonella abortus-ovis, Salmonella sendai, and Salmonella typhi-suis develop slowly and sparsely (Kauffmann, 1954). The reasons for the poor growth of these strains are not known. Also, their sparse growth makes isolation more difficult. In t...

INTRODUCTION ........................................................... Commitment to Nature..................................................... What is Nature? ............................................................ POPULATION PROBLEMS .............................................. ASSESSMENT OF MICROBIAL NUMBERS OR MASS......................... DEFINING BOUNDARIES OF THE HABITAT .........