The beta-amyloid peptide (A beta), the major component of the senile plaques found in the brains of Alzheimer's disease patients, is derived from proteolytic processing of a transmembrane glycoprotein known as the amyloid precursor protein (APP). Human APP exists in various isoforms, of which the major ones contain 695, 751, and 770 amino acids. Proteolytic cleavage of APP by alpha- or beta-sec...

Native alpha-cyclodextrin (alpha-CD) is found to spontaneously form films at aqueous solution/air interfaces. Shape-response measurements to volume perturbations on drops hanging from a capillary indicate that temperature and sodium dodecyl sulfate (SDS) concentration strongly modify the viscoelastic properties of such films. By using isothermal titration calorimetry (ITC), Brewster angle micro...

The snail Helix nemoralis in negatively geotropic creeping orients upward upon an inclined surface until the angle of the path of progression (theta) is related to the tilt of the surface (alpha) as (Delta sin theta) (Delta sin alpha) = - const.; theta is very nearly a rectilinear function of log sin alpha. The precision of orientation (P.E.(theta)) declines in proportion to increasing sin alph...

Alpha-particle spectrometry is the most frequently used technique for the activity determination of alpha emitters, such as radium, uranium, plutonium, americium and thorium in environmental samples. In this paper an extensive uncertainty budget is presented for a typical alpha-particle spectrometry measurement of the Ra activity concentration in drinking water. The most influential parameters ...

We studied the band structure of $\mathrm{Nd}\phantom{\rule{0.16em}{0ex}}\mathrm{Fe}\phantom{\rule{0.16em}{0ex}}{\mathrm{As}}_{1\ensuremath{-}x}{\mathrm{P}}_{x}{\mathrm{O}}_{0.9}{\mathrm{F}}_{0.1}$ ($x=0$, 0.2, 0.4, and 0.6) using angle-resolved photoemission spectroscopy (ARPES) measurements. Two hole bands, ${\ensuremath{\alpha}}_{1}$ $({d}_{xz})$ ${\ensuremath{\alpha}}_{3}$ $({d}_{{z}^{2}})$...