نتایج جستجو برای: inner sigma derivation
تعداد نتایج: 135786 فیلتر نتایج به سال:
BACKGROUND The large number (30) of permanent human embryonic stem cell (hESC) lines and additional 29 which did not continue growing, in our laboratory at Karolinska Institutet have given us a possibility to analyse the relationship between embryo morphology and the success of derivation of hESC lines. The derivation method has been improved during the period 2002-2009, towards fewer xeno-comp...
Embryonic stem cells, derived from the inner cell mass of embryos in the blastocyst stage, are cells capable of perpetual self-renewal and long-term propagation and hold the potential to differentiate to progeny of the three embryonic germ layers. Since their derivation approximately two decades ago, exploration of mouse ES cells made major advances in ES cell differentiation research and in th...
This paper presents a new and unified approach to the derivation analysis of many existing, as well discontinuous Galerkin methods for linear elasticity problems. The is based on discrete formulation problem consisting four discretization variables: strong symmetric stress tensor \(\varvec{\sigma }_h\) displacement \(u_h\) inside each element, modifications these two variables \(\check{\varvec{...
in this paper, we introduce the notion of derivation on krasner hyperrings as follows: the function d : r r isa derivation on a krasner hyperring r if for all , , ry x ) ( ) ( = ) ( y d x d y x d andd (x y) d (x) y x d ( y). then, we investigate some fundamental properties of derivation on krasnerhyperings and prime krasner hyperrings. also, we introduce differential krasner hy...
We use a high-precision radial velocity survey of FGKM stars to study the conditional occurrence two classes planets: close-in small planets (0.023--1 au, 2--30 Earth masses) and distant giant (0.23--10 30--6000 masses). find that $41^{+15}_{-13}\%$ systems with close-in, planet also host an outer giant, compared $17.6^{+2.4}_{-1.9}\%$ for irrespective presence. This implies hosts may be enhanc...
The use of ∑ exp(iS[x]) as the generic form for a sum over histories in configuration space is discussed critically and placed in its proper context. The standard derivation of the sum over paths by discretizing the paths is reviewed, and it is shown that the form ∑ exp(iS[x]) is justified only for Schrodinger-type systems which are at most second order in the momenta. Extending this derivation...
Pluripotent cells emanate from the inner cell mass (ICM) of the blastocyst and when cultivated under optimal conditions immortalize as embryonic stem cells (ESCs). The fundamental mechanism underlying ESC derivation has, however, remained elusive. Recently, we have devised a highly efficient approach for establishing ESCs, through inhibition of the MEK and TGF-β pathways. This regimen provides ...
Lack of robust methods for establishment and expansion of pluripotent human embryonic stem (hES) cells still hampers development of cell therapy. Laminins (LN) are a family of highly cell-type specific basement membrane proteins important for cell adhesion, differentiation, migration and phenotype stability. Here we produce and isolate a human recombinant LN-521 isoform and develop a cell cultu...
in the first chapter we study the necessary background of structure of commutators of operators and show what the commutator of two operators on a separable hilbert space looks like. in the second chapter we study basic property of jb and jb-algebras, jc and jc-algebras. the purpose of this chapter is to describe derivations of reversible jc-algebras in term of derivations of b (h) which are we...
begin{abstract} If $F,D:Rto R$ are additive mappings which satisfy $F(x^{n}y^{n})=x^nF(y^{n})+y^nD(x^{n})$ for all $x,yin R$. Then, $F$ is a generalized left derivation with associated Jordan left derivation $D$ on $R$. Similar type of result has been done for the other identity forcing to generalized derivation and at last an example has given in support of the theorems. end{abstract}
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید