General solutions for closely spaced corotating helical vortices are obtained using a filament approach. For these vortex structures, symmetry is broken but maintain form of spatial periodicity. We show there exists moving frame where elements move along the structure without distorting it. Locally, behaves much like pair aligned with locally tangent flow. However, away from cores induced flow ...

Plasma discharge lamps are widely utilized in the practice of angle-resolved photoemission spectroscopy (ARPES) experiments as narrow-linewidth ultraviolet photon sources. However, many emission lines such Ar-I, Ne-I, and Ne-II have closely spaced doublet lines, which result superimposed replica on measured ARPES spectra. Here, we present a simple method for subtracting contribution these from ...

The chloroplast thylakoid membrane of green plants is organized in stacked grana membranes and unstacked stroma membranes. We investigated the structural organization of Photosystem II (PSII) in paired grana membrane fragments by transmission electron microscopy. The membrane fragments were obtained by a short treatment of thylakoid membranes with the mild detergent n-dodecyl-alpha, d-maltoside...