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50 . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 High Resolution Thin-Film Thermistors . . . . . . . . 2 Miniaturized Enzyme Thermistors . . . . . . . . . . 3 Integrated Thermopiles . . . . . . . . . . . . . 62 Advances in Biochemical Engineering / Biotechnology, Vol. 64 Managing Editor: Th. Scheper © Springer-Verlag Berlin Heidelberg 1999 36 F. Lammers · Th. 4 Bio-Thermochips . . . . . . . . . . .

Another amplification system uses a combination of lactate oxidase, lactate dehydrogenase and catalase (LOD/LDH/CAT-system; Fig. 8). Due to evolution of hydrogen peroxide from the cycling reaction, a coimmobilisation of catalase effects an additional amplification. The cycle represents an oxidation of NADH with oxygen accompanied by a very high enthalpy (DH = –255 kJ/mol). The value agrees with the sum of enthalpies taking part in the cycle (Scheller et al. 1985). Mecklenburg et al. (1993) used the LOD/LDH/CAT-system for an insulin-TELISA.

Enantiomeric analysis of DL-phenylalaninemethylester centrations (2 mmol/l and higher). 5. Due to the instability of urease, the buffer contains 2 mm L-cysteine as well. Arginase cleaves the aminoacid to L-ornithine and urea. Consequently, urease converts the urea to ammonia and carbon dioxide. 1–100 mmol/l) similar to immobilized urease columns. 5 mmol/l). The amplification factor is about fourteen. The aminoacid L-asparagine is used as a nitrogen source in different cultivation processes. Especially, the aminoacid L-asparagine has found application in fermentation processes of ergotamine-producing Claviceps purpurea.

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