| 1. |
- Flygare, S., et al.
(author)
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Magnetic aqueous two-phase separation in preparative applications
- 1990
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In: Enzyme and Microbial Technology. - 0141-0229. ; 12:2, s. 95-103
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Journal article (peer-reviewed)abstract
- Magnetic aqueous two-phase separation is a new technique to speed up the separation of aqueous two-phase systems (Anal. Biochem. 1987, 167, 331–339). It is based on the addition of magnetically susceptible material (e.g. 1-μ iron oxide particles) which induces rapid phase separation when a mixed system is placed in a magnetic field. The technique has been applied to a number of two-phase systems. The time for phase separation was decreased by a factor of 5–240,000, with the largest improvement for systems containing high concentrations of protein and for systems with viscous or nearly isopycnic phases. An apparatus for preparative multistage extraction with magnetic separation was constructed and tested on glycolytic enzymes present in a yeast extract using a dextran/Cibacron blue-polyethylene glycol system. The presence of iron oxide particles did not adversely affect the extracted enzymes. An electromagnet-based apparatus for continuous phase separation on a larger scale was also designed. A phase system containing crude dextran and unpurified cell homogenate was effectively processed. The apparatus also allowed effective separation when the phase containing iron oxide particles was only a small fraction (4%) of the total phase system.
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| 2. |
- Weis, J, et al.
(author)
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Measurement of magnetic susceptibility and MR contrast agent concentration
- 1994
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In: Magnetic Resonance Imaging. - 0730-725X .- 1873-5894. ; 12:6, s. 859-864
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Journal article (peer-reviewed)abstract
- This paper describes an MR imaging method for determining magnetic susceptibility constants of solutions containing paramagnetic contrast agents. The method's validity is demonstrated on Gd(DTPA) and Dy(DTPA) water solutions. The method can be used for measurement of the volume magnetic susceptibility or concentration of contrast agents in biological tissues.
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| 3. |
- Wikström, Victoria, et al.
(author)
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Friction torque and slip of rollers in roller bearings under arctic conditions
- 1991
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In: Tezisy dokladov / Meždunarodnyj Sovetsko-Skandinavskij Seminar Mašiny, Materialy i Konstrukcii v Arktičeskich Uslovijach = Abstracts / International Soviet-Scandinavian Seminar Machines, Materials and Structures in Arctic Conditions.
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Conference paper (peer-reviewed)
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