Search

Soliton excitation is investigated for a coherently coupled nonlinear Schrodinger system, which describes soliton propagation in optical fibers with two orthogonally polarized components. Analytical soliton solutions, in which two free functions are involved, are constructed via the auxiliary function method. Special solitons can be excited by setting the free functions as some specific functions. S-type, V-type, W-type, periodic wave and doubly periodic wave solitons are excited and demonstrated graphically.

Process assessment experiment was conducted to investigate the applicability of integration technology (CCI, concentration, cooling and ion exchange) to manufacture sodium-free lithium chloride from salt lake brine. The preliminary separation process of sodium from brine, using evaporating concentration by adding surfactant, showed the amount of sodium in brine decreases to below 0.187%. Then, brine was further cooling separation process which was characterized in that the ammonia is added in order to decrease the solubility of NaCl. The purification of lithium chloride from cooling brine was then conducted with a novel separation process which was designed by a novel ion exchange method using inorganic ion-exchanger Li 1.4 Cr 0.4 Ti 1.6 (PO 4 ) 3 . The total yield of LiCl with the present purification process was 86.16%, and the sodium concentration in the supernatant is 0.0005 wt.%.

The N-soliton solutions for an extended generalization of Vakhnenko equation are calculated by applying the improved Hirota method and the variable transformations. The N-soliton solutions can be expressed explicitly. Furthermore, the interaction processes are discussed for the N-soliton solutions.

We discovered a stem cell factor (SCF)-triggered, MEK1-independent, and PI3K-dependent MAPK activation pathway in the Kit-expressing ovarian cancer cell line HEY. When we knocked down MEK1 with RNA interference (RNAi) to study the function of MEK1 on the proliferation and survival of ovarian cancer cells, we found that impaired cell growth still occurred after MEK1 expression had been suppressed, although MAPK activation remained intact. This suggests that there is MEK1-independent activation of MAPK in the SCF-induced ovarian cancer cell growth process, and that MEK1 still plays a crucial role in maintaining the malignant properties of ovarian cancer cells even when it fails to activate MAPK as expected.