| 1. |
- Allenmark, Stig, 1936, et al.
(författare)
-
Recent advances in spirochalcogenurane stereochemistry - A mini review
- 2008
-
Ingår i: Chirality. - : Wiley. - 0899-0042 .- 1520-636X. ; 20, s. 544-551
-
Tidskriftsartikel (refereegranskat)abstract
- A summary of the present knowledge of the stereochemistry of the hypervalent spirochalcogenuranes, especially the role of the central atom (S, Se, Te) for the chemical and configurational stability and the chiroptical and X-ray crystallographic techniques available for the determination of absolute configuration, is given.
|
|
| 2. |
- Celikaksoy, Aycan, 1974-, et al.
(författare)
-
The unaccompanied refugee minors and the Swedish labour market
- 2015
-
Rapport (övrigt vetenskapligt/konstnärligt)abstract
- More unaccompanied refugee children arrive to and get a residence permit in Sweden than in any other country in Europe. The number of children who arrives is increasing fast. The Swedish experiences are therefore of great interest also for other countries. In this paper we study the labour market situation in terms of employment and income for those who have arrived as unaccompanied minors and have been registered in Sweden. We compare them with those who also arrived as minors from the same countries but who have arrived together with their parents. After controlling for demographic and migration related variables we find that young adults who arrived as unaccompanied refugee children are more likely to be employed than those children who arrived accompanied from the same countries. Another result is that labour market participation is much lower for females than for males. We also compare the labour market situation of these children with that for those who were born in Sweden and are of the same age.
|
|
| 3. |
|
|
| 4. |
- Rasmussen, Magnus, et al.
(författare)
-
Genome-based identification and analysis of collagen-related structural motifs in bacterial and viral proteins.
- 2003
-
Ingår i: Journal of Biological Chemistry. - 1083-351X. ; 278:34, s. 32313-32316
-
Tidskriftsartikel (refereegranskat)abstract
- Collagens are extended trimeric proteins composed of the repetitive sequence glycine-X-Y. A (c) under bar ollagen- related (S) under bar tructural (m) under bar otif (CSM) containing glycine-X-Y repeats is also found in numerous proteins often referred to as collagen-like proteins. Little is known about CSMs in bacteria and viruses, but the occurrence of such motifs has recently been demonstrated. Moreover, bacterial CSMs form collagen-like trimers, even though these organisms cannot synthesize hydroxyproline, a critical residue for the stability of the collagen triple helix. Here we present 100 novel proteins of bacteria and viruses (including bacteriophages) containing CSMs identified by in silico analyses of genomic sequences. These CSMs differ significantly from human collagens in amino acid content and distribution; bacterial and viral CSMs have a lower proline content and a preference for proline in the X position of GXY triplets. Moreover, the CSMs identified contained more threonine than collagens, and in 17 of 53 bacterial CSMs threonine was the dominating amino acid in the Y position. Molecular modeling suggests that threonines in the Y position make direct hydrogen bonds to neighboring backbone carbonyls and thus substitute for hydroxyproline in the stabilization of the collagen-like triple-helix of bacterial CSMs. The majority of the remaining CSMs were either rich in proline or rich in charged residues. The bacterial proteins containing a CSM that could be functionally annotated were either surface structures or spore components, whereas the viral proteins generally could be annotated as structural components of the viral particle. The limited occurrence of CSMs in eubacteria and lower eukaryotes and the absence of CSMs in archaebacteria suggests that DNA encoding CSMs has been transferred horizontally, possibly from multicellular organisms to bacteria.
|
|
