• The Transactions of The Korean Institute of Electrical Engineers
• /
• v.56 no.8
• /
• pp.1450-1454
• /
• 2007

This paper presents a microfabricated Clark-type sensor which exactly can measure dissolved oxygen in the cell containing solution. We designed, fabricated, and characterized a microfabircated Clark-type oxygen sensor for measuring dissolved oxygen. The microfabricated oxygen sensor consists of 3-electrodes on a glass substrate, a FEP (Fluorinated ethylene propylene) oxygen-permeable membrane, and PDMS (Polydimethylsiloxane) reservoir for storing sample solution. Thin-film Ag/AgCl was employed as a reference electrode and its durability was verified by obtaining a stable open circuit potential for 2 hours against a commercial Ag/AgCl electrode and a stable cyclic voltammetry curve. Selectivity, response time, and linearity of the fabricated oxygen sensor were also verified well by cyclic voltammetry and amperometry depending. The fabricated oxygen sensor showed a 90% response time of 40sec and an excellent linearity with a correlation coefficient of 0.994.

• Food Industry
• /
• s.169
• /
• pp.104-115
• /
• 2002

Physiological effect of Korean black soybean pigment were investigated. Major anthocyanin pigments of Korean black soybean were extracted with $1\%$ HCI for 24hours at $4^{\circ}C$. Inhibitory effects of angiotensin converting enzyme