نتایج جستجو برای: polarised target
تعداد نتایج: 400491 فیلتر نتایج به سال:
In this paper we report a direct evidence of the suppression of critical current due to pair-breaking in a superconducting micro-bridge when the measurement is carried out by injecting spin polarised carriers instead of normal electrons. A thin layer of La0.7Ca0.3MnO3 was used as the source of spin polarised carriers. The micro-bridge was formed on the DyBa2Cu3O7-δ thin film by photo-lithograph...
A differentiation between dynamic polarised protons close to tyrosyl radical sites in catalase and those of the bulk is achieved by time-resolved polarised neutron scattering. Three radical sites, all of them being close to the molecular centre and the heme, appear to be equally possible. Among these is tyr-369 the radial site of which had previously been proven by EPR.
In 1995, the HERMES experiment 1],,2] at HERA/DESY started its extensive program to study the spin structure of the nucleon through deep inelastic scattering (DIS) of longitudinally polarised positrons oo polarised ? ! H; ? ! D and 3 ? ! He targets. Inclusive polarised DIS measurements aim at a precise determination of the spin structure functions g 1 and g 2 of the proton and the neutron, usin...
Polarisation asymmetries are measured for the hard exclusive leptoproduction of real photons from a longitudinally polarised hydrogen target. These asymmetries arise from the deeply virtual Compton scattering and Bethe-Heitler processes. From the data are extracted two asymmetries in the azimuthal distribution of produced real photons about the direction of the exchanged virtual photon: AUL wit...
We study the moduli spaces of polarised irreducible symplectic manifolds. By a comparison with locally symmetric varieties of orthogonal type of dimension 20, we show that the moduli space of polarised deformation K3 manifolds with polarisation of degree 2d and split type is of general type if d ≥ 12. MSC 2000: 14J15, 14J35, 32J27, 11E25, 11F55
Polarised tissue elongation during morphogenesis involves cells within epithelial sheets or tubes making and breaking intercellular contacts in an oriented manner. Growing evidence suggests that cell adhesion can be modulated by endocytic trafficking of E-cadherin (E-cad), but how this process can be polarised within individual cells is poorly understood. The Frizzled (Fz)-dependent core planar...
Distal renal tubular acidosis (dRTA) is characterised by defective acid secretion by kidney alpha-intercalated cells. Some dominantly inherited forms of dRTA result from anion exchanger 1 (AE1) mutations. We have developed a stably transfected cell model for the expression of human kidney AE1 (kAE1) and mutant kAE1 proteins in MDCKI cells. Normal kAE1 was delivered to the plasma membrane of non...
In a double polarised electron scattering experiment data have been taken from which G n E can be extracted for Q 2 = 0.2 GeV 2 /c 2. We have measured asymmetries corresponding to the spin-spin correlation functions A ′ x and A ′ z and to the target analyzing power A 0 y. In order to investigate the influence of the reaction mechanisms and the different components of the 3 He wave function, als...
The theoretical status of the 'proton spin' effect is reviewed. The conventional QCD parton model analysis of polarised DIS is compared with a complementary approach, the composite operator propagator-vertex (CPV) method, each of which provides its own insight into the origin of the observed suppression in the first moment of g p 1. The current status of both experiment and non-perturbative cal...
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