| 11. |
- Berggren, Matz S., 1950, et al.
(författare)
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Kräftgång för Ullhandskrabban
- 2010
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Ingår i: Fauna & Flora. - 0014-8903. ; 105:3, s. 12-17
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 12. |
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| 13. |
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| 14. |
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| 15. |
- Bivik, Caroline, et al.
(författare)
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Novel Genes Involved in Controlling Specification of Drosophila FMRFamide Neuropeptide Cells
- 2015
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Ingår i: Genetics. - : Genetics Society of America. - 0016-6731 .- 1943-2631. ; 200:4, s. 1229-1244
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Tidskriftsartikel (refereegranskat)abstract
- The expression of neuropeptides is often extremely restricted in the nervous system, making them powerful markers for addressing cell specification . In the developing Drosophila ventral nerve cord, only six cells, the Ap4 neurons, of some 10,000 neurons, express the neuropeptide FMRFamide (FMRFa). Each Ap4/FMRFa neuron is the last-born cell generated by an identifiable and well-studied progenitor cell, neuroblast 5-6 (NB5-6T). The restricted expression of FMRFa and the wealth of information regarding its gene regulation and Ap4 neuron specification makes FMRFa a valuable readout for addressing many aspects of neural development, i.e., spatial and temporal patterning cues, cell cycle control, cell specification, axon transport, and retrograde signaling. To this end, we have conducted a forward genetic screen utilizing an Ap4-specific FMRFa-eGFP transgenic reporter as our readout. A total of 9781 EMS-mutated chromosomes were screened for perturbations in FMRFa-eGFP expression, and 611 mutants were identified. Seventy-nine of the strongest mutants were mapped down to the affected gene by deficiency mapping or whole-genome sequencing. We isolated novel alleles for previously known FMRFa regulators, confirming the validity of the screen. In addition, we identified novel essential genes, including several with previously undefined functions in neural development. Our identification of genes affecting most major steps required for successful terminal differentiation of Ap4 neurons provides a comprehensive view of the genetic flow controlling the generation of highly unique neuronal cell types in the developing nervous system.
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| 16. |
- Bjelke, Ulf, et al.
(författare)
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Crustacea : Kräftdjur - crustaceans
- 2010
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Ingår i: The 2010 Red List of Swedish Species. Rödlistade arter i Sverige 2010. - Uppsala : ArtDatabanken, SLU. - 9789188506351 ; , s. 487-493
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 17. |
- Blomberg, Lars G., et al.
(författare)
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Solar windmagnetosphere-ionosphere coupling : an event study based on Freja data
- 2004
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Ingår i: Journal of Atmospheric and Solar-Terrestrial Physics. - : Elsevier BV. - 1364-6826 .- 1879-1824. ; 66:5, s. 375-380
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Tidskriftsartikel (refereegranskat)abstract
- Freja data are used to study the relative contributions from the high-latitude (reconnection/direct entry) and low-latitude (viscous interaction) dynamos to the cross-polar potential drop. Convection streamlines which are connected to the high-latitude dynamo may be identified from dispersed magnetosheath ions not only in the cusp/cleft region itself but also several degrees poleward of it. This fact, together with Freja's orbital geometry allows us to infer the potential drop from the high-latitude dynamo as well as to obtain a lower limit to the potential drop from the low-latitude dynamo for dayside Freja passes. All cases studied here are for active magnetospheric conditions. The Freja data suggest that under these conditions at least one third of the potential is generated in the low-latitude dynamo. These observations are consistent with earlier observations of the potential across the low-latitude boundary layer if we assume that the low-latitude dynamo region extends over several tens of Earth radii in the antisunward direction along the tail flanks, and that the majority of the potential drop derives from the sun-aligned component of the electric field rather than from its cross-boundary component, or equivalently, that the centre of the dynamo region is located quite far down tail. A possible dynamo geometry is illustrated.
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| 18. |
- Brehm, Stefan, et al.
(författare)
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University–industry linkages and absorptive capacity: an empirical analysis of China's manufacturing industry
- 2012
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Ingår i: Economics of Innovation and New Technology. - : Informa UK Limited. - 1043-8599 .- 1476-8364. ; 21:8, s. 837-852
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Tidskriftsartikel (refereegranskat)abstract
- We analyze the contribution of universities to innovative performance in China’s manufacturing sector. Our empirical analysis is based on a matched dataset comprising about 20 000 large and medium sized companies aggregated at the three-digit industry level and information on university knowledge output for 31 provinces between 1998 and 2004. We show that universities’ impact on commercial innovation varies with the type of activity performed and is contingent on the manufacturing sector’s investment in absorptive capacity. In addition, our results confirm organizational theory stating that there is a complementary relationship between capabilities to acquire and assimilate external knowledge on the one hand and the capacity to transform and exploit this knowledge on the other.
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| 19. |
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| 20. |
- Brodin, Gert, et al.
(författare)
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Nonlinear wave interaction and spin models in the magnetohydrodynamic regime
- 2011
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Ingår i: New Journal of Physics. - Bristol, UK : Institute of Physics Pub.. - 1367-2630. ; 13:August, s. 083017-08331
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Tidskriftsartikel (refereegranskat)abstract
- Here we consider the influence on the electron spin in the magnetohydrodynamic (MHD) regime. Recently developed models that include spin-velocity correlations are taken as the starting point. A theoretical argument is presented, suggesting that in the MHD regime a single-fluid electron model with spin correlations is equivalent to a model with spin-up and spin-down electrons constituting different fluids, but where the spin-velocity correlations are omitted. Three-wave interaction of two shear Alfven waves and a compressional Alfven wave is then taken as a model problem to evaluate the asserted equivalence. The theoretical argument turns out to be supported, because the predictions of the two models agree completely. Furthermore, the three-wave coupling coefficients obey the Manley-Rowe relations, which further support the soundness of the models and the validity of the assumptions made in the derivation. Finally, we point out that the proposed two-fluid model can be incorporated in standard particle-in-cell schemes with only minor modifications.
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