Abstract The JRC applied six measurement techniques to standardise the activity of an 241 Am solution in frame 2003 key comparison CCRI(II)-K2.Am-241. methods used were alpha-particle counting at a defined small solid angle, high-efficiency particle and photon with windowless 4π CsI(Tl) sandwich spectrometer, alpha pressurised proportional counter, alpha-gamma coincidence sum counter NaI(Tl) we...

Transient responses of a space-clamped squid axon membrane to step changes of voltage or current are often approximated by exponential functions of time, corresponding to a series resistance and a membrane capacity of 1.0 muF/cm(2). Curtis and Cole (1938, J. Gen. Physiol.21:757) found, however, that the membrane had a constant phase angle impedance z = z(1)(jomegatau)(-alpha), with a mean alpha...

Abstract A common realization of superhydrophobic surfaces comprises a periodic array cylindrical bubbles which are trapped in periodically grooved solid substrate. We consider the thermocapillary animation liquid motion by macroscopic temperature gradient is longitudinally applied over such bubble mattress. Assuming linear variation interfacial tension with temperature, at slope $\sigma _T$, w...

A monoclonal antibody specific for the chicken alpha 1 (XII) collagen chain was used to immunolocalize type XII collagen in the corneoscleral of 17-19-day-old chicken embryos. These immunofluorescence studies localized type XII collagen around the scleral cartilages and ossicles. There was also a striking positive staining in the scleral spur and stroma of the corneolimbus beneath the external ...

We demonstrate a calculated alpha-helix peptide folding energy landscape which accurately simulates the first experimentally measured alpha-helix melting energy landscape. We examine a 21-amino acid, mainly polyalanine peptide and calculate the free energy along the Psi Ramachandran angle secondary folding coordinate. The experimental free energy landscape was determined using UV resonance Rama...

Eleven subjects with normal eyes and sixteen subjects with open-angle glaucoma had a selective alpha-adrenergic blocking agent, thymoxamine hydrochloride 0.5 per cent eyedrop, applied to one of their eyes. This consistently produced miosis, but did not significantly alter the intraocular pressure or the tonographically determined facility of aqueous outflow. Because we find that thymoxamine can...

Abstract The classical problem of a two-dimensional infinite linear elastic wedge, with opening angle $2\alpha $ 2 α , subjected to the action concentrated couple at its tip, was considered by Carothers. solution, which presents quadratic singularity in stress field, suffers spurious behavior...

Upon a surface inclined at angle alpha Asterina gibbosa orients upward during negatively geotropic creeping until the average angle (theta) of the path is such that Delta sin theta/Delta sin alpha = const. This is true also in positively geotropic movement. The direction of orientation may be temporarily reversed by mechanical disturbance. The variation of theta is greater at low slopes. Tests ...

sn-1,2-diacylglycerol (DAG), a key intermediate in lipid metabolism, activates protein kinase C and is a fusogen. Phosphoinositides, the main sources of DAG in cell signaling, contain mostly stearoyl and arachidonoyl in the sn-1 and -2 positions, respectively. The polymorphic behavior of sn-1-stearoyl-2-arachidonoylglycerol (SAG) was studied by differential scanning calorimetry, x-ray powder di...

BACKGROUND Femoroacetabular impingement (FAI) is predominant in young male athletes, but not much is known about gait differences in cases of increased hip alpha angles. In our study, the hip alpha angle of Nötzli of soccer players was quantified on the basis of magnetic resonance imaging (MRI) with axial oblique sequences. The aim of the current study was to compare the rearfoot motion and pla...