Search results for "transition"
showing 10 items of 3988 documents
New high-pressure phase and equation of state of Ce2Zr2O8
2012
In this paper we report a new high-pressure rhombohedral phase of Ce2Zr2O8 observed from high-pressure angle-dispersive x-ray diffraction and Raman spectroscopy studies up to nearly 12 GPa. The ambient-pressure cubic phase of Ce2Zr2O8 transforms to a rhombohedral structure beyond 5 GPa with a feeble distortion in the lattice. Pressure evolution of unit-cell volume showed a change in compressibility above 5 GPa. The unit-cell parameters of the high-pressure rhombohedral phase at 12.1 GPa are ah = 14.6791(3) {\AA}, ch = 17.9421(5) {\AA}, V = 3348.1(1) {\AA}3. The structure relation between the parent cubic (P2_13) and rhombohedral (P3_2) phases were obtained by group-subgroup relations. All t…
Konstytucyjna zasada równości w kontekście przepisów abolicyjnych w ustawie Polski Ład
2022
Artykuł został poświęcony instytucji przejściowego ryczałtu od dochodów wprowadzonej ustawą Polski Ład. Jak wykazano, w istocie spełnia ona kryteria abolicji podatkowej i jednocześnie budzi poważne wątpliwości co do zgodności z konstytucyjnymi zasadami równości (art. 32 Konstytucji RP) i powszechności opodatkowania (art. 84 Konstytucji RP). W publikacji przedstawiono instytucję abolicji podatkowej, jej istotę i rys historyczny oraz normatywną konstrukcję przejściowego ryczałtu od dochodów. Analizie poddano także zgodność przepisów normujących instytucję przejściowego ryczałtu od dochodów ze wskazanymi przepisami ustawy zasadniczej
SUSTAINABLE MOBILITY: SIMULATION OF THE ADOPTION OF FUEL CELL ELECTRIC VEHICLES
2022
The experience of birth: a family transition in a foreign country
2010
Observatoire de la Transition Socio-écologiqueen Bourgogne Franche-Comté : Comprendre les conditions des transitions
2022
Comment faire fonctionner un observatoire de la transition socioécologique au sein d'une MSH : génèse du projet, apports et freins !
Economic studies on higher education and productivity
2015
Anharmonic onsets in polypeptides revealed by neutron scattering: experimental ecidences and quantitative description of energy resolution dependence
2012
Immobilization of proteins in silica gel: Biochemical and biophysical properties
2015
The development of silica-based sol-gel techniques compatible with the retention of protein structure and function started more than 20 years ago, mainly for the design of biotechnological devices or biomedical applications. Silica gels are optically transparent, exhibit good mechanical stability, are manufactured with different geometries, and are easily separated from the reaction media. Biomolecules encapsulated in silica gel normally retain their structural and functional properties, are stabilized with respect to chemical and physical insults, and can sometimes exhibit enhanced activity in comparison to the soluble form. This review briefly describes the chemistry of protein encapsulat…
Superradiant Quantum Phase Transition for an Exactly Solvable Two-Qubit Spin-Boson Model
2023
A spin-boson-like model with two interacting qubits is analysed. The model turns out to be exactly solvable since it is characterized by the exchange symmetry between the two spins. The explicit expressions of eigenstates and eigenenergies make it possible to analytically unveil the occurrence of first-order quantum phase transitions. The latter are physically relevant since they are characterized by abrupt changes in the two-spin subsystem concurrence, in the net spin magnetization and in the mean photon number.
Raman analysis of insulin denaturation induced by high-pressure and thermal treatments
2012
Raman spectroscopy has been used to investigate different conformational states of bovine pancreatic insulin: the native form and several structurally modified states with different extent of denaturation induced by thermo-chemical treatment and by applying very high pressure (up to 8 GPa) using a diamond anvil cell. High-pressure results confirm the peculiar strength to volume compression of insulin and largely extend the pressure range of its structural stability (0-4.2 GPa). Above 4.2 GPa, insulin undergoes an irreversible structural transition that, once pressure is released, leaves the sample in a new conformational state. The protein secondary structure after the pressure treatment re…