| 1. |
- Bohlin, Christina, et al.
(författare)
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Product profiles in enzymic and non-enzymic oxidations of the lignin model compound erythro-1-(3,4-dimethoxyphenyl)-2-(2-methoxyphenoxy)-1,3-propanediol
- 2005
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Ingår i: Journal of Molecular Catalysis - B Enzymatic. - : Elsevier BV. - 1381-1177 .- 1873-3158. ; 35:4-6, s. 100-107
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Tidskriftsartikel (refereegranskat)abstract
- The erythro form of the lignin model compound 1-(3,4-dimethoxyphenyl)-2-(2-methoxyphenoxy)-1,3-propanediol (1) was oxidized with laccase/ABTS, lead(IV) tetraacetate (LTA), lignin peroxidase/H2O2, cerium(IV) ammonium nitrate (CAN) and Fenton's reagent. The product profiles obtained with the different oxidants were compared after separation, identification and quantification of the products using HPLC, UV-diode array detector and electrospray ionization mass spectrometry in positive ionization mode. The oxidants generated different product profiles that reflected their different properties. Oxidation with laccase/ABTS resulted almost exclusively in formation of 1-(3,4-dimethoxyphenyl)-3-hydroxy-2-(2-methoxyphenoxy)-1-propanone (2). Oxidation with LTA resulted in more 3,4-dimethoxybenzaldehyde (3) than ketone 2. Lignin peroxidase and CAN gave similar product profiles and aldehyde 3 was the predominant product (only small amounts of ketone 2 were formed). Oxidation with Fenton's reagent resulted in the formation of more aldehyde 3 than ketone 2 but the yields were very low. CAN served as an excellent model for the lignin peroxidase-catalyzed oxidation, while the laccase-mediator system, LTA and Fenton's reagent provided distinctly different product profiles. Erythro-1-(3,4-dimethoxyphenyl)-1,2,3-propanetriol was present among the products obtained on oxidation with LTA, lignin peroxidase, CAN and Fenton's reagent. The differences in redox potential between the oxidants afford an explanation of the diverse product patterns but other factors may also be of importance. The reactions leading to cleavage of the β-ether bond with formation of 1-(3,4-dimethoxyphenyl)-1,2,3-propanetriol (veratrylglycerol) were found to proceed without affecting the configuration at the β-carbon atom.
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| 2. |
- Borglin, Gunilla, et al.
(författare)
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Self-reported health complaints and their prediction of overall and health-related quality of life among elderly people
- 2005
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Ingår i: International Journal of Nursing Studies. - : Elsevier BV. - 1873-491X .- 0020-7489. ; 42:2, s. 147-158
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Tidskriftsartikel (refereegranskat)abstract
- Objective: To describe and compare self-reported health complaints, overall and health-related quality of life and to investigate how health complaints, age, gender, marital status, living and dwelling conditions and socio-economy predicted overall and health-related quality of life. Data and Method: A sample of 469 persons (aged 75-99) responded to a postal questionnaire. Multiple linear regression analysis was used to examine possible predictors. Result: Self-reported health complaints such as pain, fatigue and mobility impairment significantly predicted low overall and health-related quality life. Women had significantly lower overall and health-related quality of life than men, and a significantly higher degree of self-reported health complaints. The regression models had more similarities than differences, implying that the overall quality of life instrument were sensitive to physical influences only supposed to be detected by health-related quality of life instruments. Several of the health complaints predicting low quality of life are amenable for being relieved by nursing care. In the care of older people nurses need to assess for several health complaints simultaneously and be aware of their possible interaction when outlining interventions. Nurses are able to facilitate early detection of health complaints negatively affecting quality of life by implementing more pro-active preventive work as well as a higher degree of thorough and systematic assessments. It also seems important to consider that older woman's and men's needs for high quality of life may differ.
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| 3. |
- Borglin, Gunilla, et al.
(författare)
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The experience of quality of life among older people
- 2005
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Ingår i: Journal of Aging Studies. - : Elsevier BV. - 0890-4065 .- 1879-193X. ; 19:2, s. 201-220
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Tidskriftsartikel (refereegranskat)abstract
- Although quality of life has been in the focus of attention for over a decade there are few studies available investigating, how the old and the oldest old experience their quality of life or what quality of life actually means for them? To illuminate this, eleven in-depth interviews were conducted with six women and five men (80+) living in their home. An interpretative hermeneutic phenomenological analysis revealed that quality of life in old age meant a preserved self and meaning in existence. Maintained self-image meant that the older people experienced a coherent life with an intact meaning. How quality of life was valued depended on the meaning the old people attached to the areas of importance as well as how they were evaluated. Additionally, areas not generally included when measuring quality of life became discernible. The meaning of home, how life was viewed, thoughts about death and dying, and telling ones story proved to be areas of importance for their perception of quality of life. Thus, indicating that older people's view of quality of life is more complex than some of today's most commonly used quality of life instruments capture and that quality of life assessment tools needs to measure beyond pure health indices. For nursing care the use of life review in everyday care, and an open way towards existential topics as well as a family oriented care along with preventive work helping people to remain in their own homes may enhance their experience of quality of life.
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