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The enzyme salicylate hydroxylase was produced from Pseudomonas putida UUC-1 in an 80 dm3 16 h batch fermentation process yielding, -9 K units per 60 dm3. This enzyme preparation has been studied for its application in the construction of biosensor systems, e.g. carbon paste electrodes, screen-printed carbon electrodes, and disposable carbon enzyme electrodes, which will be used for the rapid estimation of salicylate in blood samples. The linear range of the disposable carbon enzyme electrode in response to salicylate was achieved to 1.8 mmol dm-3.

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Carbon-coated NaFePO 4 (NaFePO 4 /C) with a maricite structure was synthesized by a two-step solidstate method with sucrose as carbon source. The electrochemical performances of NaFePO 4 /C were evaluated for sodium-ion batteries (SIBs) and lithium-ion batteries (LIBs), respectively. For SIBs, the initial reversible capacity of 48.8 mAh g -1 at 0.05 C (1 C=154 mAh g -1 ) has obtained. For LIBs, the initial discharge capacity of NaFePO 4 can reach up to 75.7 mAh g -1 at 0.05 C. The reversible capacity of 50.6 and 38 mAh g -1 can be obtained at 0.1 C, 0.2 C, respectively. With a simple synthetic process, cost-effective chemicals, and desirable electrochemical performance, the maricite NaFePO 4 /C is a possible application for large-scale energy devices and stationary storage.