A great deal of progress has been made in genetic engineering for improved regulation of xylose fermentation by yeasts. An article on genetically engineered Saccharomyces for simultaneous fermentation of glucose and xylose describes the importance advances made in production of fuel ethanol from lignocellulosic biomass. In recent years, there has been increasing interests in recycling and the reuse of scrap paper as well as environment considerations. A conribution is presented which describes the research perspectives in that area. Finally, recent advances in the use of lignocellulosic biomass for the production or ethanol and organic acids are presented in two articles.
Renewable resources are inevitably of great importance in the years to come.
There is a never-ending search for better living conditions for human beings. The more resource materials can be recycled, the richer we will be. Bioconversion of lignocellulosics, natural and man-made, is an important link in that cycle. Extensive use of renewable resources will also slow down continued deterioration of the environment. Advances are being made as this volume is being put together.