Danisco Sweeteners Oy

Xyrofin Oy

Danico Sweetners Oy

Heikki Ojamo

Heikki O Heikkila

Merja Elisa Penttila

Marja-Leena Sarkki

Heikki Heikkilä

Vili Ravanko

Hannu Koivikko

Ulla Airaksinen

Olli-Pekka Eroma

Matti Tylli

Päivi Sarmala

Göran Hyöky

Leena Rahkila

Tapio Timo Viljava

Mats Walfridsson

Johan Hallborn

Andrei Miasnikov

Aristos Aristidou

Juha Veikko Nurmi

Laura Ruohonen

Heikki Heikkil&auml;

Kari Koivuranta

Marja Ilmen

John Londesborough

Peter Richard

Mervi Toivari

Hakan Gros

Jaana Uusitalo

Sirkka Keranen

Barbel Hahn-Hagerdal

Raimo Alen

Merja Penttil&auml;

B&auml;rbel Hahn-H&auml;gerdal

Sirkka Ker&auml;nen

Josef Deutscher

Maija-Leena Vehkomaki

Mira Povelainen

Claire Plazanet-Menut

Piia Haimi

Effective processes are provided for the production of xylitol and ethanol and other products from solutions derived from lignocellulose-containing material in biomass. The solutions can be hydrolyzed or partially hydrolyzed before being fermented with microbes. The fermented solution can be distilled and can be subsequently separated, such as, by chromatographic separation, membrane separation, etc. The recovered xylitol solution can be crystallized to provide pure xylitol crystals.

Process for the simultaneous production of xylitol and ethanol

The invention relates to a method for the production of xylitol, the method comprising The invention also relates to a microorganism, which has xylanolytic activity and has been genetically modified (i) to enhance its xylanolytic activity, and (ii) to reduce its xylitol metabolism.

Method for the production of xylitol

The invention relates to the methods of manufacturing five-carbon sugars and sugar alcohols as well as other compounds derived from pentose-phosphate pathway from readily available substrates such a hexoses using metabolically engineered microbial hosts.

Manufacture of five-carbon sugars and sugar alcohols

The present invention relates to a process for the production of xylitol. The process utilises ribulose for the preparation of xylitol and involves several different conversion reactions, such as reduction, epimerisation and/or isomerisation. The present invention also relates to the use of ribulose for the preparation of xylitol.

Process for the production of xylitol

The present invention relates to the production of xylitol. In particular, processes utilising L-xylose as an intermediate for xylitol production are described. The present invention also relates to process for the preparation or L-xylose, as an intermediate, by-product or end-product to be used per se.

The invention relates to the production of mannitol by bioconversion with the aid of immobilized micro-organisms as well as to the use of the mannitol and by-products formed in the conversion process. In said process a solution containing a substrate convertible into mannitol is fed into contact with solid carrier particles containing viable mannitol-forming microorganism cells immobilized in and/or on said particles. The solution is reconditioned between successive conversion steps in order to provide conversion of a major portion of said substrate into mannitol.

Process for the production of mannitol by immobilized micro-organisms

This invention relates to recombinant-DNA-technology. Specifically this invention relates to new recombinant yeast strains transformed with xylose reductase and/or xylitol dehydrogenase enzyme genes. A yeast strain transformed with the xylose reductase gene is capable of reducing xylose to xylitol and consequently of producing xylitol in vivo. If both of these genes are transformed into a yeast strain, the resultant strain is capable of producing ethanol on xylose containing medium during fermentation. Further, the said new yeast strains are capable of expressing the said two enzymes. Xylose reductase produced by these strains can be used in an enzymatic process for the production of xylitol in vitro.

Production of ethanol from xylose

This invention relates to recombinant-DNA-technology. Specifically, this invention relates to new recombinant yeast strains transformed with xylose reductase and/or xylitol dehydrogenase enzyme genes. A yeast strain transformed with the xylose reductase gene is capable of reducing xylose to xylitol and consequently of producing xylitol in vivo. If both of these genes are transformed into a yeast strain, the resultant strain is capable of producing ethanol on xylose containing medium during fermentation. Further, the said new yeast strains are capable of expressing the said two enzymes. Xylose reductase produced by these strains can be used in an enzymatic process for the production of xylitol in vitro.

Xylose utilization by recombinant yeasts

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Kirkkonummi, Finland

Heikki Ojamo