Junction single-site

In the case of a single site junction with two (spin-up and spin-down) states and Coulomb interaction between these states (Anderson impurity model), the linear conductance properties have been successfully studied by means of the EOM approach in the cases related to Coulomb blockade [203, 204] and the Kondo effect [205]. Later the same method was applied to some two-site models [206-209], Multi-level systems were started to be considered only recently [210,211], Besides, there are some difficulties in building the lesser GF in the nonequilibrium case (at finite bias voltages) by means of the EOM method [212-214],... 

Attachment sites for a molecule within a single molecule junction... 

Initially, the elasticity of concentrated polymer systems was ascribed to the existence of a network in the system formed by long macromolecules with junction sites (Ferry 1980). The sites were assumed to exist for an appreciable time, so that, for observable times which are less than the lifetime of the site, the entangled system appears to be elastic. Equation (1.44) was used to estimate the number density of sites in the system. The number of entanglements for a single macromolecule Z = M/Me can be calculated according to the modified formula... 

One of the major problems in thinking about dopamine neurotransmission is the number of features which do not fit into the textbook model of classical synaptic transmission, based on the neuromuscular junction. These include an extremely wide divergence of release sites of a single axon, extrasynaptic location of receptors, termination of neurotransmitter action by diffusion and uptake from extrasynaptic sites, and significant overflow of neurotransmitter from the synaptic cleft into the extracellular space. 

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