Universal ratios of critical amplitudes near four dimensions

The coefficients of the divergent susceptibilities and correlation lengths have universal ratios which are computed with the use of the Wilson-Fisher ?-expansion. The results are in satisfactory agreement with experiment or with the numbers derived from series expansions analysis.     

Mean potential phase space theory of chemical reactions

A nonconventional application of phase space theory to the insertion reactions A+H(2), with A=C((1)D) and S((1)D), is presented. Instead of approximating the potential energies of interaction between separated fragments by their isotropic long-range contributions, as in the original theory, the latter are replaced by the accurate potential energies averaged with respect to Jacobi angles. The integral and differential cross sections obtained from this mean potential phase space theory (MPPST) turn out to be in very satisfying agreement with the benchmark predictions of the time-independent and time-dependent statistical quantum methods. The formal and numerical simplicity of MPPST with respect to any approach combining statistical assumptions and dynamical calculations makes it a promising tool for studying indirect polyatomic reactions.     

Multiplexed immunoassay for the rapid detection of anti-tumor-associated antigens antibodies

TAAs (tumor-associated antigens) microarrays were designed to detect auto-antibodies directly in patient sera. Twelve different probes were chosen according to their described occurrence in cancer pathologies (Cyclin B1, Cyclin D1, Complement factor H, c-myc, IMP1, p53, p62, survivin, Her2/neu, Koc, NY-ESO-1 and PSA). Microarrays of these 12 proteins were immobilized within the nitrocellulose/cellulose acetate membrane of a 96-well filtering microtiter plate bottom. The captured auto-antibodies were detected using a staining approach based on alkaline phosphatase labeling. Thus, the presence of specific auto-antibodies in samples was visualized through the positive staining of the corresponding TAA spots. The TAA HiFi microarrays were shown to be able to capture specific purified anti-TAA antibodies. In real samples, 9 proteins from the 12 TAAs panel were shown to generate specific signal and 5 antigens (p53, NY-ESO-1, IMP1, cyclin B1 and c-myc) were shown to have interaction with more than 10% of the positive sera from cancer patients. This protein subpanel was proven to be able to detect 72.2% of the cancer patients tested (within a 34 panel of 18 patients and 16 healthy donors).     

Low temperature heat capacity and magnetic properties of UF3

The low temperature heat capacity of UF(3) has been measured using an adiabatic low temperature calorimeter in the temperature range from 10 to 350 K. These data are complemented at the lowest temperature region with data obtained with a Quantum Design PPMS-14 device in the temperature range from 0.5 to 20 K. Good agreement between both techniques has been found, and from these experimental results the absolute entropy of UF(3) at 298.15 K has been determined as 126.8 ± 2.5 J K(-1) mol(-1). On the basis of the specific heat data and the magnetization measurements performed on a SQUID device, a transition at 1.59 K attributed to Curie temperature of a ferromagnetic transition has been found in this study. This observation makes UF(3) a unique compound with an unusually low ferromagnetic ordering temperature.