Characteristics of Gluconobacter oxydans B-1280 and Pichia methanolica MN4 cell based biosensors for detection of ethanol

被引:33
作者
Reshetilov, AN [1 ]
Trotsenko, JA [1 ]
Morozova, NO [1 ]
Iliasov, PV [1 ]
Ashin, VV [1 ]
机构
[1] Russian Acad Sci, Inst Biochem & Physiol Microorganisms, Pushchino 142292, Moscow Region, Russia
关键词
ethanol detection; microbial sensors; Gluconobacter oxydans; Pichia methanolica; Clark type electrode;
D O I
10.1016/S0032-9592(01)00141-8
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Pichia methanolica and Gluconobacter oxydans were immobilized on chromatographic paper and fixed on an Clark type oxygen electrode. The lower limit of ethanol detection was 0.05 mM for both types of biosensors. Of all substrates tested (ethanol, methanol, isopropanol, glucose, xylose, xylitol, arabinose, arabitol, glycerol, pyruvate, citrate, acetate), the P. methanolica-based sensor had a higher selectivity and was susceptible only to ethanol, methanol and insignificantly to isopropanol. The sensor based on G. oxydans cells was less selective. The major interfering compounds were glucose and glycerol. The dependence of signal amplitude on the conditions of measurement and cell density was studied in both sensor models. The sensors proved reasonably stable and after 8 days of continuous measurements the signal decreased not more than 50% for both types of biosensors. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:1015 / 1020
页数:6
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