Prolonged propagation of human embryonic stem (hES) cells is currently achieved by coculture with primary mouse embryonic fibroblasts (MEFs) serving as feeder cells. Unlike mouse ES cells, adding growth factors such as leukemia inhibitory factor is insufficient to maintain undifferentiated hES cells without feeder cells. The presence of uncharacterized rodent cells or crude extracts imposes a r...

Because human embryonic stem (hES) cells can differentiate into virtually any cell type in the human body, these cells hold promise for regenerative medicine. The genetic manipulation of hES cells will enhance our understanding of genes involved in early development and will accelerate their potential use and application for regenerative medicine. The objective of this study was to increase the...

background: deoxynivalenol (don) is a mycotoxin produced mainly by fusarium graminearum in grains such as wheat and maize. the aim of this study was to evaluate the inhibitory effects of citrus flavanones including, naringin (nar), hesperidin (hes), and neohesperidin (neo) on deoxynivalenol production using response surface methodology (rsm). methods: the studied flavanones were extracted from ...

in this article, an analytical approximate solution of nonlinear fractional convection-diffusion with modifiedriemann-liouville derivative was obtained with the help of fractional variational iteration method (fvim). a newapplication of fractional variational iteration method (fvim) was extended to derive analytical solutions in theform of a series for this equation. it is indicated that the so...

in this paper, the multistage variational iteration method is implemented to solve a general form of the system of first-order differential equations. the convergence of the proposed method is given. to illustrate the proposed method, it is applied to a model for hiv infection of cd4+ t cells and the numerical results are compared with those of a recently proposed method.

The hyperbolic-equation system (HES) approach is applied to the calculation of a Hall thruster using the hybrid particle-in-cell (PIC) method. The HES approach enables accurate computations of magnetized electron fluids in quasi-neutral plasmas with a simple structured mesh. SPT-100 thruster is assumed as the calculation condition. The calculation results indicate that the Bohm criterion is sat...

Edge states of two-dimensional topological insulators are helical and single-particle backscattering is prohibited by time-reversal symmetry. In this paper, we show that an isotropic exchange coupling edge (HES) to a spin 1/2 impurity subjected magnetic field results in characteristic current noise (BCN) as function bias voltage tilt angle between the direction quantization axis HES. particular...

variational iteration method using he's polynomials can be used to construct solitary solution and  compacton-like solution for nonlinear dispersive equatioons. the chosen initial solution can be determined in compacton-like form or in solitary form with some compacton-like or solitary forms with some unknown parameters, which can be determined in the solution procedure. the compacton-like solu...