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A Bacillus sphaericus Based Biosensor for Monitoring Nickel Ions in Industrial Effluents and FoodsAbstract: A microbial-based biosensor has been developed based on enzyme inhibition bioassay for monitoring the presence of Ni(II) in real-time samples. The sensing element is immobilized Bacillus sphaericus MTCC 5100 yielding urease enzyme. The transducer is an NH4
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