| 1. |
- Billberg, Peter, et al.
(författare)
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Form Pressures Generated by Self-Consolidating Concrete
- 2005
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Ingår i: Concrete International. - 0162-4075 .- 1944-7388. ; 27:10, s. 35-42
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Tidskriftsartikel (refereegranskat)abstract
- Since its development, it has been generally assumed that self-consolidating concrete (SCC) would generate hydrostatic formwork pressure due to the rate at which it can be cast and the long time before it starts to set. However, in 1998 when the first bridges were cast using SCC in Sweden, measured form pressures were even lower than the design values for conventional concrete. To investigate the need for special formwork design considerations when using SCC, a series of eight wall specimens were cast, and the resulting form pressures were monitored.
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| 2. |
- Helou, Khalil, 1966, et al.
(författare)
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Comparative genome hybridization reveals specific genomic imbalances during the genesis from benign through borderline to malignant ovarian tumors.
- 2006
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Ingår i: Cancer genetics and cytogenetics. - : Elsevier BV. - 0165-4608. ; 170:1, s. 1-8
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Tidskriftsartikel (refereegranskat)abstract
- Ovarian cancer is one of the most common types of malignancy in women throughout the developed world. Despite recent therapeutic advances, long-term survival is poor because ovarian cancer is largely asymptomatic in its early stages. Comparative genomic hybridization (CGH) was applied to a series of 8 benign, 8 borderline, and 17 malignant ovarian to establish genomic imbalances associated with tumor progression. Benign and borderline tumors were characterized by losses at 1p32 approximately p11, 2q14 approximately q34, 4q13 approximately q34, 5q11 approximately q23, and 6q12 approximately q24, as well as gains of 6p and chromosome 12. Similar chromosomal changes were also detected in malignant tumors but included additional chromosomal changes: gains at 1q21 approximately q31, 2p, 3q, 5p, 7, 10p, 12p, 16p, 17, 19q, 20q, and 22q, as well as losses at X, 3p, 8p, 9, 11p, 13, 14, and 18. Some individual cases of benign and borderline tumors revealed no genetic alterations detectable by CGH, suggesting that these tumors may represent a subset of tumors that originate by an alternative mechanism of tumorigenesis. Furthermore, our findings reveal that borderline tumors are more similar to benign tumors than to malignant tumors with respect to their genetic profiles.
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| 3. |
- Kruskopf Österberg, Marita, 1970-
(författare)
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From QTLs to Genes: Flowering Time Variation and CONSTANS-LIKE Genes in the Black Mustard (Brassica nigra)
- 2007
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The transition to flowering is a major developmental switch in angiosperms, the timing of which is expected to be important for fitness. In this thesis the focus has been on identification of genes affecting natural variation in flowering time in Brassica nigra. The background for this thesis is an earlier QTL-mapping study in B. nigra. The genomic area with the greatest effect on flowering time in that study contained a homolog to the CONSTANS gene, which is known to affect flowering time in A. thaliana. When studied more closely this gene did not seem to affect flowering time variation in B. nigra. Near the B.nigra CO gene (BniCOa), however, we identified a homolog to the related CONSTANS LIKE 1 (COL1) gene. In A. thaliana COL1 has not been shown to be associated with induction of flowering but since the B. nigra homolog (BniCOL1) in the QTL area showed surprising amounts of variation between early and late flowering plants we set out to test if this variation was associated with flowering time variation. In the first paper we found a significant association between flowering time and one indel (Ind2) in the coding region. Motivated by the results in paper one, we searched for evidence of selection at the BniCOL1(paper two). In paper three the aim was to validate the results from the first paper in a larger sample of populations, and to check whether the association found in paper I could reflect linkage disequilibrium with areas outside of the gene. Finally, in paper four we investigate the general evolution of three CONSTANS-LIKE genes in B. nigra, namely BniCOL1, BniCOa and BniCOb.
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| 4. |
- Yuen, Katarina, et al.
(författare)
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Matching a permanent magnet synchronous generator to a fixed pitch vertical axis turbine for marine current energy conversion
- 2009
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Ingår i: IEEE Journal of Oceanic Engineering. - 0364-9059 .- 1558-1691. ; 34:1, s. 24-31
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Tidskriftsartikel (refereegranskat)abstract
- Extracting energy from a free-flow marine current using a vertical axis fixed pitch turbine requires a generator that can handle varying speeds and loads, since such a turbine gives maximum power capture for a fixed tip speed ratio. A prototype of such a generator has been designed and constructed. In this paper, its variable speed and load operation is evaluated, both in terms of how the constructed generator performs in relation to simulations, and in terms of how the generator could perform with three different fixed pitch turbines. Measurements of root mean square (RMS) voltage and current differ 10% from simulations. Performance analysis with example turbines shows that the generator can match fixed tip speed ratio operation of several turbines for current speeds between 0.5 and 2.5 m/s.
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