26 research outputs found
Polarization-analyzed resonant inelastic x-ray scattering of the orbital excitations in KCuF3
We report a Cu K-edge resonant inelastic x-ray scattering (RIXS) study of
orbital excitations in KCuF3 . By performing the polarization analysis of the
scattered photons, we disclose that the excitation between the eg orbitals and
the excitations from t2g to eg exhibit distinct polarization dependence. The
polarization dependence of the respective excitations is interpreted based on a
phenomenological consideration of the symmetry of the RIXS process that yields
a necessary condition for observing the excitations. In addition, we show that
the orbital excitations are dispersionless within our experimental resolution.Comment: 5 pages, 3 figure
A historical perspective on the discovery of statins
Cholesterol is essential for the functioning of all human organs, but it is nevertheless the cause of coronary heart disease. Over the course of nearly a century of investigation, scientists have developed several lines of evidence that establish the causal connection between blood cholesterol, atherosclerosis, and coronary heart disease. Building on that knowledge, scientists and the pharmaceutical industry have successfully developed a remarkably effective class of drugsâthe statinsâthat lower cholesterol levels in blood and reduce the frequency of heart attacks
Risk of cardiovascular events among patients with HIV treated with atazanavir-containing regimens: a retrospective cohort study
Synthesis of .BETA.-SiAlON from a zeolite by reduction nitridation in a mixture of NH3-C3H8
Clinical Efficacy of Thrombus Aspiration on 5-Year Clinical Outcomes in Patients With ST-Segment Elevation Acute Myocardial Infarction Undergoing Percutaneous Coronary Intervention.
Background: Adjunctive thrombus aspiration (TA) during primary percutaneous coronary intervention (PCI) was reported to promote better coronary and myocardial reperfusion. However, longâterm mortality benefit of TA remains controversial. The objective of this study is to investigate the clinical impact of TA on longâterm clinical outcomes in patients with STâsegment elevation myocardial infarction (STEMI) undergoing primary PCI. Methods and Results: The CREDOâKyoto AMI Registry is a largeâscale cohort study of acute myocardial infarction patients undergoing coronary revascularization in 2005â2007 at 26 hospitals in Japan. Among 5429 patients enrolled in the registry, the current study population consisted of 3536 patients who arrived at the hospital within 12 hours after the symptom onset and underwent primary PCI. Clinical outcomes were compared between the 2 patient groups with or without TA. During primary PCI procedures, 2239 out of 3536 (63%) patients underwent TA (TA group). The cumulative 5âyear incidence of allâcause death was significantly lower in the TA group than in the nonâTA group (18.5% versus 23.9%, logârank P<0.001). After adjusting for confounders, however, the risk for allâcause death in the TA group was not significantly lower than that in the nonâTA group (hazard ratio: 0.90, 95% CI: 0.76 to 1.06, P=0.21). The adjusted risks for cardiac death, myocardial infarction, stroke, and targetâlesion revascularization were also not significantly different between the 2 groups. Conclusions: Adjunctive TA during primary PCI was not associated with better 5âyear mortality in STEMI patients