Normal-superconducting transition induced by high current densities in YBa2Cu3O7-d melt-textured samples and thin films: Similarities and differences

Current-voltage characteristics of top seeded melt-textured YBa2Cu3O7-d are presented. The samples were cut out of centimetric monoliths. Films characteristics were also measured on microbridges patterned on thin films grown by dc sputtering. For both types of samples, a quasi-discontinuity or quenching was observed for a current density J* several times the critical current density Jc. Though films and bulks much differ in their magnitude of both Jc and J*, a proposal is made as to a common intrinsic origin of the quenching phenomenon. The unique temperature dependence observed for the ratio J*/Jc, as well as the explanation of the pre-quenching regime in terms of a single dissipation model lend support to our proposal.Comment: 10 pages, 10 figures, submitted to Physical Review

Bulk texturing of prereacted Bi/Pb(2223) under triaxial stresses at room temperature

International audienceThe use of triaxial stresses within the high-fluid-pressure scope is proposed as a new technique for texturing at room temperature isostatically pre-compacted Bi1.8Pb0.4Sr2Ca2.2Cu3O10.3+x powder samples. Preliminary results based mainly on microscopy observations indicated that the as-deformed samples have been textured with the c-axis parallel to the pressing direction

Bulk texturing of prereacted Bi/Pb(2223) under triaxial stresses at room temperature

International audienceThe use of triaxial stresses within the high-fluid-pressure scope is proposed as a new technique for texturing at room temperature isostatically pre-compacted Bi1.8Pb0.4Sr2Ca2.2Cu3O10.3+x powder samples. Preliminary results based mainly on microscopy observations indicated that the as-deformed samples have been textured with the c-axis parallel to the pressing direction

Acetyl-coa carboxylase regulates platelet lipid content in coronary artery disease patients

Proteomic

Oxidized low-density lipoprotein, in contrast to inflammatory cytokines, activates AMPK-ACC signaling in human platelets

Proteomic

Platelet Acetyl-CoA Carboxylase Phosphorylation A Risk Stratification Marker That Reveals Platelet-Lipid Interplay in Coronary Artery Disease Patients

Adenosine monophosphate-activated protein kinase (AMPK) acetyl-CoA carboxylase (ACC) signaling is activated in platelets by atherogenic lipids, particularly by oxidized low-density lipoproteins, through a CD36-dependent pathway. More interestingly, increased platelet AMPK-induced ACC phosphorylation is associated with the severity of coronary artery calcification as well as acute coronary events in coronary artery disease patients. Therefore, AMPK-induced ACC phosphorylation is a potential marker for risk stratification in suspected coronary artery disease patients. The inhibition of ACC resulting from its phosphorylation impacts platelet lipid content by down-regulating triglycerides, which in turn may affect platelet function. (C) 2019 The Authors. Published by Elsevier on behalf of the American College of Cardiology Foundation.Host-parasite interactio