| 1. |
- Svensson, Lotta, 1959-
(författare)
-
Vinna och försvinna? : Drivkrafter bakom ungdomars utflyttning från mindre orter
- 2006
-
Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Starting in the everyday life of Söderhamn’s youth, this thesis presents the driving forces that affect youth as they make decisions to stay in or to leave their home region.The research has been done with an interactive approach in close collaboration with youth and adults, and a number of different methods have been used. Based on the interviews, essays, questionnaires, conversations and meetings that underlie this work, the ambition has been to participate and contribute to the formation of knowledge in dialog with the youth and the adults who surround them.The dissertation (thesis) shows that society’s basic structures have great influence on youth’s decision whether to stay or leave. Important factors are actual circumstances, such as the access that youth have to resources – economical, social, and cultural. Society’s gender order has a big impact on the question whether to move or stay. Likewise, the tension between center and periphery plays an essential role – where the power to define what is “right” and “natural” coincides with values on how youth “are” and “should be”.The dissertation (thesis) shows that the interplay between these factors appears different for different individuals and groups, and that the interplay has significance both for the move/stay –decision and for the youth’s desire and possibility to participate in and have influence over society’s development in the region.
|
|
| 2. |
- Mjösberg, Jenny, et al.
(författare)
-
Systemic reduction of functionally suppressive CD4dimCD25highFoxp3+ Tregs in human second trimester pregnancy is induced by progesterone and 17θ-estradiol
- 2009
-
Ingår i: Journal of Immunology. - : The American Association of Immunologists. - 0022-1767 .- 1550-6606. ; 183:1, s. 759-769
-
Tidskriftsartikel (refereegranskat)abstract
- CD4+CD25high regulatory T cells (Tregs) are implicated in the maintenance of murine pregnancy. However, reports regarding circulating Treg frequencies in human pregnancy are inconsistent, and the functionality and phenotype of these cells in pregnancy have not been clarified. The aim of this study was to determine the frequency, phenotype, and function of circulating Tregs in the second trimester of human pregnancy and the influence of progesterone and 17β-estradiol on Treg phenotype and frequency. Based on expressions of Foxp3, CD127, and HLA-DR as determined by multicolor flow cytometry, we defined a proper CD4dimCD25high Treg population and showed, in contrast to most previous reports, that this population was reduced in second trimester of pregnancy. Unexpectedly, Foxp3 expression was decreased in the Treg, as well as in the CD4+ population. These changes could be replicated in an in vitro system resembling the pregnancy hormonal milieu, where 17β-estradiol, and in particular progesterone, induced, in line with the pregnancy situation, a reduction of CD4dimCD25highFoxp3+ cells in PBMC from nonpregnant women. By coculturing FACS-sorted Tregs and autologous CD4+CD25– responder cells, we showed that Tregs from pregnant women still displayed the same suppressive capacity as nonpregnant women in terms of suppressing IL-2, TNF-, and IFN- secretion from responder cells while efficiently producing IL-4 and IL-10. Our findings support the view of hormones, particularly progesterone, as critical regulators of Tregs in pregnancy. Furthermore, we suggest that in the light of the results of this study, early data on circulating Treg frequencies in pregnancy need reevaluation.The costs of publication of this article were defrayed in part by the payment of page charges. This article must therefore be hereby marked advertisement in accordance with 18 U.S.C. Section 1734 solely to indicate this fact.
|
|
| 3. |
- Olivecrona, Lotta, et al.
(författare)
-
Standard orientation of the pelvis : Validation on a model and ten patients
- 2005
-
Ingår i: Acta Radiologica. - London, UK : Informa Healthcare. - 0284-1851 .- 1600-0455. ; 46:1, s. 74-82
-
Tidskriftsartikel (refereegranskat)abstract
- Purpose: To validate an image post-processing method for re-orienting the pelvis in CT volumes to a standardized orientation in a model and in 10 patients. Material and Methods: Twenty-four CT volumes of a pelvic model and 10 pairs of postoperative total hip arthroplasty (THA) patient CT scans were rotated to a defined pelvic standard orientation and the rotation was recorded. For precision, a test-retest procedure was used. For accuracy, three exactly represented coordinate points were used. For clinical application, the standard orientation was used for calculating the direction of acetabular cup migration from a previous model study. Results: Precision of pelvic standard orientation, calculated as maximal directional error, was better than 1degrees in the model study and better than 1.5degrees in the patient study. Accuracy, expressed as angle between ideal and measured coordinate axes, was 0.1degrees for x, y, z axes. No measurable systematic errors were found. When applied to acetabular cup migration in the model, standardization of pelvic orientation had no significant effect on the measurements. Conclusion: Reorienting the pelvis during image post-processing was shown to be accurate. It enables measurements relative to the pelvis and minimizes the dependency of patient positioning.
|
|
| 4. |
|
|
| 5. |
- Sjögreen, Lotta, 1954, et al.
(författare)
-
Sväljningsstörningar - allmän del : Dysphagia
- 2007
-
Ingår i: Logopediboken. Hartelius L, Netterbladt U, redaktörer. - Lund : Studentlitteratur. - 9789144038865 ; , s. 473-8
-
Bokkapitel (övrigt vetenskapligt/konstnärligt)
|
|
| 6. |
- Svensson, Birgitta, et al.
(författare)
-
Frictional properties of native and chemically modified birch wood
- 2007
-
Ingår i: Nordic Pulp & Paper Research Journal. - 0283-2631 .- 2000-0669. ; 22:3, s. 325-330
-
Tidskriftsartikel (refereegranskat)abstract
- The chemithermomechanical pulping of hardwoods has attracted increasing interest in the past decade. This study investigates the frictional behavior of both native and chemically treated birch under simulated chip-refining conditions (hot saturated steam, high sliding speed). Chip pretreatment, i.e. chemical impregnation and pre-heating done when birch chemithermomechanical pulp is produced, affects energy consumption during refining; the study found that frictional forces may be an important parameter in this respect. The coefficient of friction peaks at approximately 115°C for both native and extracted birch. It was shown that sulfonating native birch decreased its coefficient of friction over the temperature range investigated (100�170°C). The coefficient of friction had a broad and flat peak in the 130�150°C temperature interval for the specimens treated with 3% sodium sulfite at pH 13.5. Furthermore, it was clear that pH had a profound influence on the coefficient of friction. A high pH lowered the coefficient of friction, likely due to well lubricated contacts. The friction arising between birch (Betula verrucosa) and steel was shown to be higher than that between spruce (Picea abies) and steel. The higher stiffness and density of the birch wood, together with a more porous bulk structure leading to rough test surfaces, are some factors possibly accounting for these high friction coefficients. Also, the differences in the amount and composition of the extractive substances in birch and spruce may contribute to the differing frictional behaviors of these species.
|
|
| 7. |
|
|
| 8. |
- Svensson, Lotta, 1959-
(författare)
-
Att vara som skoskav
- 2008
-
Ingår i: Gemensamt kunskapande. - Växjö : Växjö university press. - 9789176366219 ; , s. 77-94
-
Bokkapitel (övrigt vetenskapligt/konstnärligt)
|
|
| 9. |
|
|
| 10. |
|
|
| 11. |
|
|
| 12. |
|
|
| 13. |
|
|
| 14. |
- Wallin, Lotta, et al.
(författare)
-
Artificial dispersal as a restoration tool in meadows : sowing or planting?
- 2009
-
Ingår i: Restoration Ecology. - 1061-2971 .- 1526-100X. ; 17:2, s. 270-279
-
Tidskriftsartikel (refereegranskat)abstract
- Habitat fragmentation and the abandonment of former agricultural practices have led to extremely low dispersal rates for plant species growing in traditionally managed hay meadows in Sweden. Historically, seed dispersal between populations was maintained by hay movement, grazing animals, and farmers sharing their equipment. Because these means of dispersal typically are no longer occurring, artificial dispersal using seeds and plug-plants is tested here as a restoration tool. In this study, we chose two perennial herbs commonly occurring in meadows as test species, viz, Hypochoeris maculata L. (Asteraceae) and Succisa pratensis Moench. (Dipsacaceae). We found that plug-plant transplants were twice as effective as seed sowing for both species. The seed collection site was found to be important for seed-based establishment and survival; consequently, the choice of donor meadow is important when acquiring seeds used for restoration. We also found that survival of plants introduced as seeds was generally lower at sites harboring species favored by nitrogen as well as at sites in later successional phases. Both methods of introducing meadow species worked well, even though long-term establishment may well be more successful with the plug-plant method due to higher plug-plant establishment 2 years after introduction in the field.
|
|
| 15. |
- Wallin, Lotta, 1975-
(författare)
-
Plant Population Dynamics and Conservation in Wooded Hay-Meadows – Effects of Intensified Management
- 2007
-
Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The decrease in number and area of managed hay-meadows over the last century, in combination with the reduction of traditional management, threatens the biodiversity connected to these habitats. I experimentally examined how management intensity affected meadow characteristics and long-term population viability of three vascular plant species in wooded hay-meadows on the Swedish island of Gotland in the Baltic Sea. I discovered that intensified management (extra raking and/or extra mowing) reduced the amount of litter and biomass, even in well-managed meadows. The effects of intensified management on population growth rate varied among species. Deterministic demographic models revealed that intensified management increased population growth rate in Succisa pratensis. Stochastic modelling confirmed this; all meadows displayed larger projected population sizes 50 years into the future with intensified management. Polygala amarella responded with lower growth rates in raked plots, a consequence of the plant’s morphology, which makes it prone to being pulled out by raking. Hypochoeris maculata had population growth rates close to unity, and showed no response to an increase in management. Examination of the life-history characteristics of Polygala amarella showed that the species’ strategy is aimed at reproduction and fast growth, which is in contrast to the other two species, with their success relying on the survival of older plants. The species-specific responses to management show that several species should be considered when evaluating management practices for conservation of semi-natural grasslands. Furthermore, I suggest that data on stage distributions alone may not be sufficient for identifying threatened populations.In a study of artificial dispersal between meadows, I found that establishment was twice as successful for planted plug-plants compared to sown seeds. Both methods may be useful for introducing or augmenting meadow populations, depending on access to seed sources and possibilities to nurse plants.An electronic coordinate measurement device for gathering location data to be used in demographic studies was developed. In the field, the device proved to be a simple and reliable method for locating individuals in permanent plots.
|
|
