We study twist-three effects in deeply virtual Compton scattering on an unpolarized spin-1/2 target. A careful definition of observables as Fourier moments w.r.t. the azimuthal angle allows for a clear separation of twist-two and-three effects. Although the latter are power suppressed, they give leading contributions to the twist-three asymmetries and do not affect the twist-two observables.

In the title compound, C(14)H(9)FN(2), the dihedral angle between the benzene ring and the quinoxaline ring system is 22.2 (3)°. Any aromatic π-π stacking in the crystal must be very weak, with a minimum centroid-centroid separation of 3.995 (2) Å.

Abstract. Precise efforts in theoretical astrophysics are needed to fully understand the mechanisms that govern the structure, stability, dynamics, formation, and evolution of differentially rotating stars. Direct computation of the physical attributes of a star can be facilitated by the use of highly compact azimuthal and separation angle Fourier formulations of the Green’s functions for the l...

A bile salt (sodium taurodeoxycholate, NaTDC) was used to prevent phase separation between silica and lipid in self-assembled long-chain diacyl phosphatidylcholine/SiO(2) films. Phase diagrams for NaTDC/didecanoyl phosphatidylcholine/SiO(2) and NaTDC/egg phosphatidylcholine/SiO(2) films were investigated through grazing-incidence small-angle X-ray scattering at a synchrotron source.

In the title compound, C(8)H(9)NS, the dihedral angle between the aromatic ring and the thio-amide fragment is 36.0 (2)°. There are π-stacking inter-actions between coplanar aryl fragments, with a centroid-centroid separation of 3.658 (2) Å. In addition, there are inter-molecular hydrogen bonds between the amino group and the S atoms.

In the title compound, C(17)H(14)N(2)O, the dihedral angle between the indole ring system and the benzene ring is 58.41 (4)°. The crystal packing features π-π stacking [shortest centroid-centroid separation = 3.8040 (9) Å] and C-H⋯π inter-actions.

In the title compound, C(11)H(8)FNO, the aromatic rings are oriented at a dihedral angle of 31.93 (6)°. In the crystal, mol-ecules are linked by O-H⋯N hydrogen bonds, forming C(9) chains propagating along the c-axis direction. There are aromatic π-π stacking inter-actions between the pyridine rings [centroid-centroid separation = 3.7238 (16) Å].

We have investigated the phase behaviour of pUC18 plasmid solutions with phase separation experiments and polarized light microscopy. Furthermore, the configuration of the superhelix is monitored with small-angle neutron scattering. The phase diagram is interpreted with liquid crystal theory including the effects of charge, orientation entropy, excluded volume, as well as the elastic, entropic ...

We study twist-three effects in deeply virtual Compton scattering on an unpolarized spin-1/2 target. A careful definition of observables as Fourier moments w.r.t. the azimuthal angle allows for a clear separation of twist-two and-three effects. Although the latter are power suppressed, they give leading contributions to the twist-three asymmetries and do not affect the twist-two observables.

The equilibrium tide-generating forces in the lunar orbital plane of a planet of radius R are calculated for the case of N moons of mass Mi orbiting the planet at instantaneous polar coordinates (Di, αi). For the case of a single moon, there are only two high tides. For the case of two moons, it is found that there can exist a critical lunar orbital distance at which two high tides become unsta...