graded potential barrierWKB methodmodified airy functionsGeneral expressions of tunneling probability for arbitrarily graded potential barriers are rigorously derived using the modified Airy functions. Three types of graded potential barriers for which......
Lippmann et al. present a protocol for differentiating human pluripotent stem cells into blood-brain barrier endothelial cells. The cells should be useful for studying this endothelial barrier, including screening for drugs that can cross from the blood
3. The mode of action (MoA) for carcinogenicity 4. Oral studies in mammals with specific emphasis on local irritation 5. Studies with oral exposure in birds, specific emphasis on local irritation (Table 1) 6. Studies with oral exposure, potential systemic effects 7. Reproductive and developmenta...
The probability for carriers to traverse the potential barrier is calculated numerically using a transfer matrix method. This probability is related to the current density and enables the numerical calculation of the current density through the Schottky Barrier Diode (SBD). The paper utilises a ...
A major barrier to progress is the overly broad definition of the syndrome, which encompasses a vast, multidimensional array of clinical and biological features. Different combinations of these features may naturally cluster into previously undescribed subsets or phenotypes that may have different risks ...
We show that classical solutions of the Euclidean action can be used to calculate the shift in energy levels due to tunneling through a potential barrier. ... E Gildener,A Patrascioiu - 《Physical Review D》 被引量: 175发表: 1977年 Summing the spectral representations of Poeschl--Teller an...
Derivation of midbrain dopamine neurons from human embryonic stem cells Human embryonic stem (hES) cells are defined by their extensive self-renewal capacity and their potential to differentiate into any cell type of the human ... AL Perrier,V Tabar,T Barberi,... - 《Proc Natl Acad Sci U...
Initially classified as passive and merely supporting cells, today, astrocytes are known as active components of brain development, homeostasis and function. These features include the regulation of blood flow, blood brain barrier formation and function, and synapse formation and elimination1,2,3,4. ...
For out-of-plane modes exact closed form expressions and exact recurrence relations are derived. Asymptotic expressions for the matrix elements are calculated. Exact closed form expressions for matrix elements with quantum numbers which correspond to regions close to the dissociation barrier are given. ...
Clearly, a pair-merged structure is not a barrier for movement, and Internal Set-MERGE could apply freely across derivational dimensions in principle. As for the contrast between nominal and verbal domains, several possibilities suggest themselves. For the impossible wh-movement of young out of ⟨...