| 1. |
- Christenson, Andreas, et al.
(författare)
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Direct electron transfer between ligninolytic redox enzymes and electrodes
- 2004
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Ingår i: Electroanalysis. - : Wiley. - 1040-0397 .- 1521-4109. ; 16:13-14, s. 1074-1092
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Forskningsöversikt (refereegranskat)abstract
- The electrochemistry of the ligninolytic redox enzymes, which include lignin peroxidase, manganese peroxidase and laccase and possibly also cellobiose dehydrogenase, is reviewed and discussed in conjunction with their basic biochemical characteristics. It is shown that long-range electron transfer between these enzymes and electrodes can be established and their ability to degrade lignin through a direct electron transfer mechanism is discussed.
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| 2. |
- Nistor, Catalin, et al.
(författare)
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In-field monitoring of cleaning efficiency in waste water treatment plants using two phenol-sensitive biosensors
- 2002
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Ingår i: Analytica Chimica Acta. - 1873-4324. ; 456:1, s. 3-17
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Tidskriftsartikel (refereegranskat)abstract
- Two amperometric biosensors based on the enzymes cellobiose dehydrogenase (CDH) and quinoprotein-dependent glucose dehydrogenase (GDH), have been applied for monitoring the phenolic content in water samples, collected at different stages of a waste water treatment process, thus representing different cleaning levels of two waste water treatment plants (WWTPs). The biosensor measurements were performed in-field, compared with the results obtained by liquid chromatography-mass spectrometry and were further correlated with the cleaning efficiencies of the WWTPs. The effect of several potentially interfering compounds on the sensor response was also studied. The general purpose of the study was to evaluate the potential use of biosensors, not as quantitative tools for phenol analysis, but rather as screening tools indicating a certain trend, i.e. compounds present or not present, and potential correlation with sample toxicity. It was found that the biosensors and LC-MS results were not quantitatively comparable, however, both sensors could follow the decrease of the phenol content from the influent, primary treated and effluent waters. In addition, the correlation between biosensor inhibition and sample toxicity is discussed.
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| 3. |
- Wang, Y D, et al.
(författare)
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Determination of the stress orientation distribution function using pulsed neutron sources
- 2003
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Ingår i: Journal of applied crystallography. - 0021-8898 .- 1600-5767. ; 36:1, s. 14-22
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Tidskriftsartikel (refereegranskat)abstract
- The stress orientation distribution function (SODF) was recently introduced as a mean-field representation to describe the grain- orientation dependence of intergranular stress. Pulsed neutron sources are ideally suited for the determination of the SODF since multiple reflections can be measured simultaneously with comparable precision. A method is developed for constructing the SODF from strain pole figures measured with a pulsed neutron source and demonstrated with cold-rolled interstitial-free steel. The experimental results are compared with those measured with a reactor-based constant-wavelength diffractometer. It is shown that access to a large number of reflections on a pulsed neutron source improves the precision of the experimental SODF and facilitates in situ studies of the evolution of the intergranular stress during deformation and annealing.
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| 4. |
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| 5. |
- Stoica, SC, et al.
(författare)
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Double aortic arch masquerading as asthma for thirty years
- 2002
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Ingår i: Respiration. - : S. Karger AG. - 0025-7931 .- 1423-0356. ; 69:1, s. 92-95
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Tidskriftsartikel (refereegranskat)abstract
- A case of a 30-year-old woman with a double-barrelled aorta misdiagnosed as asthma is presented. The patient was significantly improved after surgical treatment but a degree of airway symptoms persisted. She was further investigated and diagnosed with tracheomalacia. The paediatric experience with managing tracheomalacia is briefly reviewed and recommendations for the treatment of the rare adult cases are made. Our report emphasises the importance of early diagnosis and treatment of aortic arch abnormalities.
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