Hadronic Vacuum Polarization Contribution to the Anomalous Magnetic Moments of Leptons from First Principles.

We compute the leading, strong-interaction contribution to the anomalous magnetic moment of the electron, muon, and tau using lattice quantum chromodynamics (QCD) simulations. Calculations include the effects of u, d, s, and c quarks and are performed directly at the physical values of the quark masses and in volumes of linear extent larger than 6 fm. All connected and disconnected Wick contractions are calculated. Continuum limits are carried out using six lattice spacings. We obtain a_{e}^{LO-HVP}=189.3(2.6)(5.6)×10^{-14}, a_{µ}^{LO-HVP}=711.1(7.5)(17.4)×10^{-10} and a_{τ}^{LO-HVP}=341.0(0.8)(3.2)×10^{-8}, where the first error is statistical and the second is systematic.

Dielectric study of interaction of water with normal and osteoarthritis femoral condyle cartilage.

The main goal of this paper is the in vitro study of healthy and osteoarthritis (OA) human cartilage using the dielectric spectroscopy in the alpha-dispersion region of the electric field and in the temperatures from 25 to 140°C. The activation energy of conductivity needed to break the bonds formed by water in the extracellular matrix takes the average values of 61kJ/mol and 44kJ/mol for the control and OA cartilages, respectively. At 28°C, the small difference appears in the permittivity decrement between the control and OA cartilages, while the conductivity increment is about 2 times higher for the control tissue than that for the OA tissue. At 75°C, the conductivity increment for both of these samples is 8 times higher than their respective permittivity decrement. In addition, at 140°C the values of these both parameters for the OA tissue decrease by 8 times as compared to those recorded for the control sample. The relaxation frequency of about 10kHz is similar for both of these samples. The knowledge on dielectric properties of healthy and OA cartilage may prove relevant to tissue engineering focused on the repair of cartilage lesions via the layered structure designing.

Do urban and rural residents living in Poland differ in their ways of coping with chronic diseases?

OBJECTIVE: Chronic disease is a critical life event which demands significant psychological adjustment. Coping strategies and resources such as sense of coherence, self-efficacy, etc. remain factors affecting stress response. PATIENTS AND METHODS: The examined group included patients with ischemic heart disease (n = 134), type 1 diabetes mellitus (n = 109) or rheumatoid arthritis (n = 92). 159 patients came from urban area whereas 176 came from rural setting. All patients filled up inventories of life satisfaction, severity of depression, coping strategies, self-efficacy, social support and sense of coherence. RESULTS: The analysis showed that patients from rural areas had higher levels of well-being, i.e., were characterized by lower severity of depression. The predictors of satisfaction with life included two types of resources i.e. self-efficacy, social support and two coping strategies i.e. turning to religion and self-distraction (R2 = 0.39; F = 26.87**). Life satisfaction was determined by social support, sense of coherence and positive reappraisal (R2 = 0.36; F = 29.11**). CONCLUSIONS: Rural/urban differences in the use of coping strategies may be associated with environmental or lifestyle differences. Patients with IHD, T1D or RA in Polish rural areas are high risk for depression so they may need help in finding systematic contact with specialists of healthcare.

Human leukocyte antigen frequencies in a selected group of Lebanese Greek Orthodox.

HLA classes I and II profiles were determined among 45 unrelated Lebanese Greek Orthodox by the complement dependent lymphomicrocytotoxicity assay. HLA epitope frequencies and alleles in linkage disequilibrium were determined; the obtained results were then compared to those reported for other groups. Moreover, possible HLA-disease associations were examined; medical history in relation to diabetes, rheumatoid arthritis, and ankylosing spondilitis was taken for each of the 45 individuals. The results indicated that: 1) There were similarities and differences in HLA frequencies and alleles in linkage disequilibrium in Greek Orthodox as compared to those in other groups. It is worth mentioning the higher frequencies of B35, DR11, and DQ3 and the existence of linkage disequilibrium between DR11 and DR52 and DR4 and DR53 in Greek Orthodox. 2) Preliminary results indicate that there were no significant HLA-disease associations between each of DR4 and rheumatoid arthritis, DR4 and insulin dependent diabetes mellitus (IDDM), and B27 and ankylosing spondilitis in the group studied. Such associations have been reported in North American Caucasians.