| 1. |
- Dewaele, A., et al.
(författare)
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High-pressure high-temperature equation of state of KCl and KBr
- 2012
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Ingår i: Physical Review B. Condensed Matter and Materials Physics. - 1098-0121 .- 1550-235X. ; 85:21, s. 214105-
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Tidskriftsartikel (refereegranskat)abstract
- The equation of state of KCl and KBr, compressed in a helium pressure medium in a diamond-anvil cell, has been measured by x-ray diffraction in the B1 and B2 phases up to 165 GPa at 298 K. The P-V-T of B2 KCl and B2 KBr has been calculated by ab initio molecular dynamics in a wide compression range and up to 7000 K. The thermal pressure exhibits a linear behavior with temperature and remains low under high compression. The experimental P-V points and the thermal pressure calculated by molecular dynamics have been used to set up a high-pressure high-temperature equation of state of B2 KCl and B2 KBr. With these equations of state, B2 KCl and B2 KBr can be used as pressure markers in laser-heated diamond-anvil-cell experiments.
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| 2. |
- Garrone, O, et al.
(författare)
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Treating patients with cancer amidst the COVID-19 pandemic: experience of a regional hospital in the Piedmont region in northern Italy
- 2020
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Ingår i: Tumori. - : SAGE Publications. - 2038-2529. ; 106:5, s. 427-431
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Tidskriftsartikel (refereegranskat)abstract
- The coronavirus disease 2019 (COVID-19) pandemic is posing an unprecedented dilemma to oncologists worldwide, forcing them to decide whether to continue or suspend treatments in order to protect their most vulnerable patients from infection. After the first report from China, the outbreak spread rapidly worldwide. To, date no clear indications on how to treat patients with cancer with COVID-19 infection are available.Methods:We report data on 21 patients with cancer referred to a single medical oncology unit of a general hospital from mid-March to April 23, 2020.Results:Nine patients were on active cancer therapy during the infection and all stopped medical treatments. Overall 8 patients developed pneumonia and 6 patients died of COVID-19.Conclusion:The management of patients with cancer during the pandemic should be carefully balanced and discussed among oncologists and other key professionals involved in the treatment of this vulnerable group of patients, in order to balance the risk of treatment and the risk of infection.
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| 3. |
- Torchio, R., et al.
(författare)
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Structure and magnetism of cobalt at high pressure and low temperature
- 2016
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Ingår i: PHYSICAL REVIEW B. - 2469-9950. ; 94:2
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Tidskriftsartikel (refereegranskat)abstract
- The magnetic and structural properties of cobalt were investigated under high pressure (160 GPa) and low temperature (50 K), by synchrotron K-edge x-ray magnetic circular dichroism and x-ray diffraction. A quasihydrostatic equation of state was measured up to 160 GPa. We found that uniaxial stress plays a role in the hexagonal close packed-face centered cubic (hcp-fcc) structural transition pressure. Also, our data provide the first experimental evidence that changes of the c/a ratio pressure derivative are related to the magnetic behavior. The complete extinction of ferromagnetism is observed above 130 GPa in a mixed hcp-fcc phase with no recovery upon cooling to 50 K, indicating that cobalt at 150 GPa is very likely nonmagnetic, i.e., characterized by zero local spin polarization. Density functional theory calculations point out that the K-edge x-ray magnetic circular dichroism (XMCD) signal is related to the 4p orbital moment rather than to the total spin moment and allow us to get a deeper insight into the K-edge XMCD measurements interpretation. The combination of novel theoretical results and experimental outputs provides a detailed scenario of the structural and magnetic properties of cobalt at these extreme conditions answering some previously unsolved issues.
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