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Sökning: WFRF:(Ng Wai Kuen)

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1.
  • Bibbo, Marluce, et al. (författare)
  • How technology is reshaping the practice of nongynecologic cytology - Frontiers of cytology symposium
  • 2007
  • Ingår i: Acta Cytologica. - 0001-5547. ; 51:2, s. 123-152
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • To pay tribute to the Founders of Acta Cytologica, this Golden Anniversary symposium on nongynecologic cytology revives the written symposium style of the 1950s. Participants from countries throughout the world were asked how new technologies are currently applied in their laboratories and whether future advances and challenges can be predicted. The specific questions and the participants' answers follow.
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2.
  • Mak, Wing Cheung, et al. (författare)
  • Novel biosensors for quantitative phytic acid and phytase measurement
  • 2004
  • Ingår i: Biosensors & bioelectronics. - : Elsevier. - 0956-5663 .- 1873-4235. ; 19:9, s. 1029-1035
  • Tidskriftsartikel (refereegranskat)abstract
    • Phytase (EC 3.1.3.26) and phytic acid (myo-inositol hexaphosphate) play an important environmental role in poultry industry and have a health aspect in food industry. Novel biosensors have been developed for simple, one step quantitative phytic acid and phytase detection. A system based on the sequentially acting enzyme phytase and pyruvate oxidase (POD) was employed for the development of phytase and phytic acid biosensors. Poly(carbamoylsulphonate) (PCS) hydrogel immobilized POD electrode was applied for the detection of phytase. It was based on the indication of phosphate ions produced by the hydrolysis of phytic acid. The phytase biosensor showed a linear response ranging from 0.5 to 6.0 units/ml. A bi-enzyme sensor based on co-immobilization of phytase and POD was developed for the detection of phytic acid on the basis of amperometric detection of the enzymatically-generated hydrogen peroxide at 0.6 V versus Ag/AgCl. It showed a linear response ranging from 0.2 to 2.0 mM with a detection limit of 0.002 mM.
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