The need to investigate mineral precipitation in heterogeneous sedimentary rock with complex pore network and composition arises problems like clogging by barite during sulfate-rich water injection geological reservoirs, the durability of long term storage nuclear waste or damage induced crystallisation. At LFCR (Laboratoire des Fluides Complexes et leurs Réservoirs, Anglet, France), we aim rep...

Metal ions are key elements in organisms' life acting like cofactors of many enzymes but they can also be potentially dangerous for the cell participating in redox reactions that lead to the formation of reactive oxygen species (ROS). Any factor inducing or limiting a metal dyshomeostasis, ROS production and cell injury may contribute to the onset of neurodegenerative diseases or play a neuropr...

To understand Si precipitation and its influence on mechanical property improvement in high pressure die casting (HPDC) Al9Si3CuFe alloy under direct ageing heat treatment, the precipitates containing in-situ MgAl2O4 particles is analyzed via atomic-resolution scanning transmission electron microscopy. It shown that lath-like form an average size of 50 nm length, a good orientation relationship...

The mitochondrial DNA mutation MTTL1 A3243G causes MELAS syndrome (Mitochondrial Encephalomyopathy, Lactic Acidosis, Stroke-like episodes). The A3243G mutation is also associated with variable endocrinopathies. We describe 2 case histories of patients with the A3243G mutation. The first patient presented with diabetes and uncontrolled Graves’ thyrotoxicosis in association with a strokelike epis...

The interaction of an autocatalytic reaction with a fast precipitation reaction is shown to produce a permanent precipitate pattern where the major driving force is differential diffusion. The final structure emerges from the leading transient cellular front, the cusps of which evolve into precipitate free zones. The experimental observations are reproduced by a simple model calculation based o...

Data are given, for seven different antisera, for the composition of the specific precipitate as a function of the relative proportions of antiserum and antigen used. In the region of antigen excess, a linear relation is found between the ratio of antibody to antigen in the precipitate and the amount of antiserum used. The significance of these results, particularly in their bearing on theories...

1. Partial hydrolysis products of the specific polysaccharide of Type III pneumococcus ranging from 550 to 1,800 in formula weight can be quantitatively freed from unhydrolyzed polysaccharide. 2. The fractions yield specific precipitates with Type III antipneumococcus horse serum but fail to precipitate homologous rabbit antisera, giving rise only to specific inhibition. The aldobionic acid, th...