TECHNOLOGY FOCUS - BIOTECHNOLOGY - Preferred Process: The step of converting at least one glucan unit to ribulose-5-phosphate involves enzymatically converting the glucan unit to glucose-1-phosphate; enzymatically converting the glucose-1-phosphate to glucose-6-phosphate; enzymatically converting the glucose-6-phosphate to 6-phosphogluconate; and enzymatically converting the 6-phosphogluconate to ribulose-5-phosphate. The hydrogen production is enzymatically coupled to conversion of glucose-6-phosphate to ribulose-5-phosphate. The process further involves enzymatically converting the ribulose-5-phosphate to at least one reaction product. The hydrogen is produced by a hydrogenase. In the method, all of the steps are performed in a single reaction vessel. The process further involves at least partially separating the hydrogen from carbon dioxide produced by the process; feeding at least some of the hydrogen into a fuel cell; and generating electricity from the hydrogen. The maximum rate of hydrogen production is at least 0.4 mmol/L/hour. The process involves: a) providing a mixture comprising a polysaccharide and water; b) providing at least one enzyme with phosphorylase activity; c) phosphorylating at least some of the polysaccharide to produce glucose-1-phosphate and a shortened polysaccharide; d) providing at least one enzyme with phosphoglucomutase activity; e) isomerizing at least some of the glucose-1-phosphate produced in step (c) into glucose-6-phosphate; f) providing several enzymes effective to catalyze the steps of the pentose phosphate pathway; g) providing at least one enzyme with some hydrogenase activity; and h) forming hydrogen from at least some of the glucose-6-phosphate produced in step (e).    TECHNOLOGY FOCUS - PHARMACEUTICALS - Preferred Kit: The kit further comprises device for generating electricity from hydrogen gas.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The polysaccharide comprises starch, cellulose or hemicellulose; or is not starch or cellulose. EXAMPLE - No suitable example given.