| 81. |
- Papalazarou, E., et al.
(författare)
-
Valence-band electronic structure of V2O3 : Identification of V and O bands
- 2009
-
Ingår i: Physical Review B. Condensed Matter and Materials Physics. - 1098-0121 .- 1550-235X. ; 80:15
-
Tidskriftsartikel (refereegranskat)abstract
- We present a comprehensive study of the photon energy dependence of the valence band photoemission yield in the prototype Mott-Hubbard oxide V2O3. The analysis of our experimental results, covering an extended photon energy range (20-6000 eV) and combined with GW calculations, allows us to identify the nature of the orbitals contributing to the total spectral weight at different binding energies, and in particular to locate the V 4s states at about 8 eV binding energy. From this comparative analysis, we conclude that the intensity of the quasiparticle photoemission peak, observed close to the Fermi level in the paramagnetic metallic phase upon increasing photon energy, does not have a significant correlation with the intensity variation in the O 2p and V 3d yield, thus, confirming that bulk sensitivity is an essential requirement for the detection of this coherent low-energy excitation.
|
|
| 82. |
|
|
| 83. |
- Patterson, Nick, et al.
(författare)
-
Large-scale migration into Britain during the Middle to Late Bronze Age
- 2022
-
Ingår i: Nature. - : Nature Publishing Group. - 0028-0836 .- 1476-4687. ; , s. 588-594
-
Tidskriftsartikel (refereegranskat)abstract
- Present-day people from England and Wales harbour more ancestry derived from Early European Farmers (EEF) than people of the Early Bronze Age1. To understand this, we generated genome-wide data from 793 individuals, increasing data from the Middle to Late Bronze and Iron Age in Britain by 12-fold, and Western and Central Europe by 3.5-fold. Between 1000 and 875 BC, EEF ancestry increased in southern Britain (England and Wales) but not northern Britain (Scotland) due to incorporation of migrants who arrived at this time and over previous centuries, and who were genetically most similar to ancient individuals from France. These migrants contributed about half the ancestry of Iron Age people of England and Wales, thereby creating a plausible vector for the spread of early Celtic languages into Britain. These patterns are part of a broader trend of EEF ancestry becoming more similar across central and western Europe in the Middle to Late Bronze Age, coincident with archaeological evidence of intensified cultural exchange2-6. There was comparatively less gene flow from continental Europe during the Iron Age, and Britain's independent genetic trajectory is also reflected in the rise of the allele conferring lactase persistence to ~50% by this time compared to ~7% in central Europe where it rose rapidly in frequency only a millennium later. This suggests that dairy products were used in qualitatively different ways in Britain and in central Europe over this period.
|
|
| 84. |
|
|
| 85. |
|
|
| 86. |
|
|
| 87. |
|
|
| 88. |
- Russom, Aman, et al.
(författare)
-
Genotyping by dynamic heating of monolayered beads on a microheater surface
- 2005
-
Ingår i: Micro Total Analysis Systems 2004. - : Royal Society of Chemistry. - 0854048960 ; , s. 303-305
-
Konferensbidrag (refereegranskat)abstract
- This paper presents SNP scoring by DASH technology by employing dynamic heating of beads immobilized on a chip with integrated heater and sensor. The microfabricated chip designed for open-surface DNA analysis allows fast, well controllable temperature ramping and homogeneous temperature distribution over the entire heater area. Beads containing DNA duplexes are immobilized on the surface of the chip by microcontact printing using a PDMS stamp. All three possible variants of a SNP site of an oligonucleotide were accurately scored using the bead-based DASH approach. Using the chip, the total analysis time could easily be reduced by a factor 2 compared with the current DASH assay.
|
|
| 89. |
|
|
| 90. |
|
|
