We have detected, by using stimulated emission, an atomic parity violation (APV) in the form of a chiral optical gain of a cesium vapor on the 7S-6P(3/2) transition, consecutive to linearly polarized 6S-7S excitation. We demonstrate the validity of this detection method of APV, by presenting a 9% accurate measurement of expected sign and magnitude. We stress several advantages of this new appro...

Abstract Background Validation of self-reported tools, such as physical activity (PA) questionnaires, is crucial. The aim this study was to determine test-retest reliability, internal consistency, and the concurrent, construct, predictive validity short semi-quantitative Physical Activity Unit 7 item Screener (PAU-7S), using accelerometry reference measurement. effect linear calibration on PAU-...

A poliovirus-specific polyuridylic acid [poly(U)] polymerase that copies a polyadenylic acid template complexed to an oligouridylic acid primer was isolated from the membrane fraction of infected HeLa cells and was found to sediment at 4 to 5S on a linear 5 to 20% glycerol gradient. When the poly(U) polymerase was isolated from cells labeled with [(35)S]methionine and was analyzed by glycerol g...

Dr. Cox has recently pointed out that before the question of the pay of the panel doctor can be settled for the future it is necessary to determine the nature of the service to be required of him, or, in other words, whether there is to be any modification in the terms of the present contract, apart from minor matters. He has also pointed out that, after the end of this year, 7s. 3d. only per h...

The use of a sensitive and quantitative radioimmunoassay has enabled much finer dissection of the immunoglobulin-antibody profiles for an individual immune response. The kinetics of the response are considered in relation to the switch from IgM to IgG antibody production. In the domestic fowl, the kinetics of this switch varied with different antigens: whereas the response to a thymus-dependent...

Multiple antibody components of rabbit antisera against p-azobenzenearsonate (R(p)) were studied with respect to their globulin nature and skin-sensitizing activity. IgA antibody was characterized by isolating two IgA-rich fractions from a specifically purified antibody preparation. Examination of these fractions showed that IgA antibodies existed in two molecular forms, one with a sedimentatio...

Six chimeric constructs of the sequentially similar growth factor-associated kallikreins-epidermal growth factor binding protein (EGF-BP) and the gamma-subunit of nerve growth factor (gamma-NGF)--have been expressed, and their ability to generate complexes with epidermal growth factor (EGF) and beta-NGF, analogous to the high molecular weight forms (7S NGF and HMW-EGF) found in the mouse submax...