Nervous systems are among the most spectacular products of evolution. Their provenance and evolution have been of interest and often the subjects of intense debate since the late nineteenth century. The genomics era has provided researchers with a new set of tools with which to study the early evolution of neurons, and recent progress on the molecular evolution of the first neurons has been bot...

The applicability of the so-called isotropic complete photonic-band-gap (CPBG) models [S. John and J. Wang, Phys. Rev. Lett. 64, 2418 (1990)] to capture essential features of the spontaneous emission (SE) of a fluorescent atom or molecule near a band-gap-edge of a CPBG structure is discussed. PACS number: 32.80.-t Photon interactions with atoms PACS number: 42.70.Qs Photonic bandgap materials w...

The applicability of the so-called isotropic and anisotropic complete photonic-band-gap (CPBG) models [S. John and J. Wang, Phys. Rev. Lett. 64, 2418 (1990)] to capture essential features of the spontaneous emission (SE) of a fluorescent atom or molecule near a band-gap-edge of a CPBG structure is discussed. It is argued that, depending on the source position within a unit cell, the SE near the...

The modelling of DNA mechanics under external constraints is discussed. Two analytical models are widely known, but disagree for instance on the value of the torsional modulus. The origin of this embarassing situation is located in the concept of writhe. This letter presents a unified model for DNA establishing a relation between the different approaches. I show that the writhe created by the l...

The major terminal enzymatic expression of the fibrinolytic cascade system in vivo is plasmin. This enzyme is piesumed to interact with fibrinogen and fibrin in vivo and is arguably man's major defence against the deposition of fibrin, an important component in the general hazard of thrombosis. Our understanding of the molecular details of plasmin interactions with fibrinogen and fibrin has bee...

The paper examines four texts by V. Stus, published in the uncensored periodical “Ukrainskyi Visnyk” from January 1970 to 1971 (“A Place a Battle or Massacre?”, “Nowadays it is clear everyone...”, “Every normally organized society...”, and poem memory of Alla Horska “Burn Bright, My Soul, Burn Do Not Weep!”) taking into account investigative files poet, who was convicted self-publishing. Within...

Problem setting. Despite the ramifications of national legislation on entrepreneurship and real activity a significant scale small medium-sized businesses, as well amount research in this area, there are problems that reduce effectiveness business results encourage improvement regulatory framework. mechanisms model entrepreneurship. The ways to implement principle freedom entrepreneurial system...

Predictions of Akkermans et al. are essentially changed when the Krein spectral displacement operator is regularized by means of zeta function. Instead of piecewise constant persistent current of free electrons on the plane one has a current which varies linearly with the flux and is antisymmetric with regard to all time preserving values of α including 1/2. Different self-adjoint extensions of...