We propose to apply an "effective boundary condition" method the problem of chiral propulsion. For case a rotating helix moving through fluid at low Reynolds number, amounts replacing original (in limit small pitch) by cylinder, but with special kind partial slip conditions non-slip on helix. These are constructed reproduce far-field velocities problem, and defined few parameters (slipping leng...

in this paper, we study spacelike dual biharmonic curves. we characterize spacelike dual biharmonic curves in terms of their curvature and torsion in the lorentzian dual heisenberg group . we give necessary and sufficient conditions for spacelike dual biharmonic curves in the lorentzian dual heisenberg group . therefore, we prove that all spacelike dual biharmonic curves are spacelike dual heli...

background: cutaneous leishmaniasis (cl) is common and endemic in many areas of iran, caused by species of a protozoan parasite belonging to the genus leishmania. there is not any effective vaccine against leishmaniasis; so, therapy is important for prevention and separation of disease. herbal extract for treatment of cl is cost-effective, applicable topically to lesions, and can avoid the deve...

Rop is a four-helix-bundle protein formed by the association of two helix-loop-helix monomers. The short helix-connecting loop was replaced with a series of polyglycine linkers of increasing length. These mutant proteins all appear to fold via the same general mechanism as that of the wild-type protein, even at the longest loop lengths. Replacement of the wild-type two-residue loop (Asp-Ala) wi...

Migratory animals endure high stress during long-distance travel in order to benefit from spatio-temporally fluctuating resources, including food and shelter or from colonization of unoccupied habitats. Along with some fishes and shrimps, nerite snails in tropical to temperate freshwater systems are examples of amphidromous animals that migrate upstream for growth and reproduction after a marin...

Id3, a member of the Id multigene family of dominant negative helix-loop-helix transcription factors, is induced sharply in murine fibroblasts by serum growth factors. To identify relevant targets of Id3 activity, the yeast two-hybrid system was used to identify proteins that dimerize with Id3. Four murine cDNAs were identified in the screen, all of which encode helix-loop-helix proteins: E12, ...