报告人简介：

Prof. Leif J. Jönsson, Department of Chemistry, Umeå University, Sweden

Prof. Jönsson received his Ph.D. in Biochemistry from Lund University in 1994 on a thesis about enzymes from lignin-degrading fungi. After postdoctoral studies at Stanford University in the USA and at VTT in Finland, he was working at Lund Institute of Technology until 2001, when he moved to Karlstad University as associate professor of biochemistry. In 2008 he received a professorship at Umeå University. The research of Prof. Jönsson is focused on biorefining of lignocellulose to commodities such as biofuels, biopolymers and green chemicals. He has two laboratories, one at the KBC Chemical-Biological Centre in Umeå (http://www.kbc.umu.se/english/) and one at Domsjö Development Area in Örnsköldsvik. The latter laboratory is a collaboration with research institutes and industrial companies engaged in wood biorefining (http://www.processum.se/en/). He is co-inventor of numerous patents within the field of lignocellulose biorefining. This includes a set of inventions that have been commercialized and that have developed into three separate patent families comprising >50 patents and patent applications around the world. He is/has been the supervisor or co-supervisor of more than 20 doctoral students, and has published more than 100 original research articles in international peer-reviewed scientific journals. Prof. Jönsson is also the head of the research platform on Biopolymers and Biochemical Conversion Technologies within the Swedish Strategic Research Environment Bio4Energy (http://www.bio4energy.se).

报告内容简介：

The sugar platform is one of the major routes for production of bio-based materials and chemicals from lignocellulosic feedstocks, e.g. residues from agriculture and forestry. Using this approach, the polysaccharides of the feedstock are converted to monosaccharides, which can then be further converted by using microbial or chemical-catalytic processes. Sugar platform processes consist of several steps including preprocessing, pretreatment, enzymatic saccharification of cellulose, and conversion of the resulting monosaccharides to the desired products. Efficient conversion, high yields, and high concentrations of sugars are required to make sugar platform processes economically competitive. This is made difficult by the innate recalcitrance of the lignocellulosic material, i.e. its natural resistance to selective degradation by enzymatic and non-enzymatic processes. Recent research that elucidates the detailed mechanisms of selected pretreatment methods will be presented, and the fundamental reasons behind the recalcitrance of lignocellulose to enzymatic deconstruction will be discussed.

报告语言：英语