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| 2. |
- Hermansson, Ann-Marie, et al.
(författare)
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The Structure of gluten gels.
- 1986
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Ingår i: Food Microstructure. ; 5, s. 233-239
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Tidskriftsartikel (refereegranskat)
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| 3. |
- Larsson, Marie, 1953-
(författare)
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Photosynthetic nitrogen assimilation in green microalgae
- 1985
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Reduction of inorganic nitrogen (N0j, N0~) in illuminated Scamdumus obtuu-iuAculuA Chod. is coupled to photosynthetic electron transport. Uptake and reduction of NO^ are in balance with incorporation of reduced N during CO2 fixation; whereas in the absence of CO2, the cells liberate NH^ derived from NOj reduction. During CO2 fixation, the ratio between CO2 fixed and N assimilated is fairly constant, irrespective of which N source (NOj, NO^, NH^) and photon flux that is used.Cells cultured in high CO2 concentrations and subsequently transferred to air-levels of CO2 develop a ^-concentrating mechanism that enables high rates of CO2 fixation at low ambient CO2 concentrations. The quotient between C and N assimilated is the same in algae grown in high and low CO2 concentrations, respectively. Cells transferred from high to low CO2 concentrations appear to increase their rates of photorespiration. However, C and N liberation in this process are considered to be of minor importance in relation to CO2 fixation and primary N assimilation.The results presented in this thesis point out the central regulatory role of CO2 fixation in N assimilation, In addition, results are presented suggesting a possible regulatory role for nitrate reductase activity in NOj assimilation.
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| 4. |
- Zygmunt, S C, et al.
(författare)
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Realignment and surgical fixation of atlanto-axial and subaxial dislocations in rheumatoid arthritis (RA) patients
- 1988
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Ingår i: Acta Neurochirurgica. Supplementum. - 0065-1419. ; 43, s. 79-84
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Tidskriftsartikel (refereegranskat)abstract
- One hundred consecutive patients with atlanto-axial dislocation(s) were subjected to posterior occipito-cervical fusion and followed up to 16 1/2 years postoperatively (mean: 4 1/2 years). The mean age at surgery was 60.3 years. At the time of follow-up, 45 patients had died, mostly due to cardiopulmonary disease. Out of the 100 patients, 67% showed a major improvement and in an additional 14% there was a slight or moderate improvement. Some patients with a stable fusion later developed subaxial dislocation(s) necessitating an anterior fusion which in patients with RA is difficult due to poor bone quality. MRI revealed pannus formation around the odontoid peg in many patients, in several to such a degree that cord compression was evident. Following the posterior fixation, the pannus disappeared or was reduced which may at least partly explain the generally favourable operative outcome following the fixation procedure. Early occipito-cervical fusion appears to prevent further vertical dislocation or upwards migration of the odontoid which is a more severe condition, and does not appear to result in increased incidence of subsequent subaxial dislocation(s). Such luxation(s) pose a technically difficult problem since the quality of the patients' own bone usually does not permit a common anterior fusion procedure with autologous graft. In such cases with cord compression, acrylic cement may be used to obtain a normalized realignment.
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