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Comparing the xylose reductase/xylitol dehydrogenase and xylose isomerase pathways in arabinose and xylose fermenting Saccharomyces cerevisiae strains

Background: Ethanolic fermentation of lignocellulosic biomass is a sustainable option for the production of bioethanol. This process would greatly benefit from recombinant Saccharomyces cerevisiae strains also able to ferment, besides the hexose sugar fraction, the pentose sugars, arabinose and xylose. Different pathways can be introduced in S. cerevisiae to provide arabinose and xylose utilisatio

Timing restrictions on prosodic phrasing

Prosodic evidence for the existence of isochronal 2-2.5 sec speech production units is presented. Factors such as F0-declination patterns defined over these 2-2.5 sec. units, as well as boundary tones at the edges of these assumed planning units give support to the idea that prosodic structure serves as an important planning framework for an utterance. The findings provide support for the assumpti

Reference Attribute Grammar Controlled Graph Rewriting: Motivation and Overview

Reference attribute grammars are a well-known language engineering technique for the implementation of semantic analyses. Reference attributes provide declarative means to extend abstract syntax trees to graphs and analyse such graphs; they are well-suited to deduce and reason about abstract syntax graphs. Efficient attribute re-evaluation in case of abstract syntax graph changes and a systematic