Energy and information exchange between “donor” and “molecular bridge” structures: non adiabatic polaron model

Molecular chains (such as protein chains with alpha-helical secondary structure, DNA and RNA molecules) can play the role of “bridges” for the highly efficient transfer of various types of submolecular excitations (vibron excitations or electrons) over very long distances (comparable to the length of the molecular chain itself). In the case when this process takes place in living cells, the biomolecule is placed in an environment where it is usually in thermodynamic equilibrium with the “heat bath”. As a result, the structural elements of the molecular chain perform mechanical oscillations. In the general case, such mechanical oscillations disrupt the ability of the molecular bridge to transfer the excitation over a longer distance. On the other side, by interacting with the thermal oscillations of the structure, excitations injected into the molecule may be trapped and can form a stable self-trapped (polaronlike) state. Such quasiparticles can move through the structure with minimal energy loss. In this way, the high efficiency of energy and charge transport in living cells can be explained. However, the properties of the possibly formed polaron quasiparticle must also be affected by the presence of the donor molecule. Here, we have discussed the mechanism of excitation transfer from a molecular structure (donor molecule) to the molecular chain. The presence of the donor structure and the temperature influence on the energy of the self-trapped excitation were considered in the dependence of the basic energy parameters of the molecular bridge. The obtained results indicate the possibility of the formation of two types of self-trapped states: a quasi-free excitation, which can easily move through the molecular bridge, and a localized, practically immobile excitation, which is similar to a non-adiabatic polaron quasiparticle.Book of abstract: 4th Belgrade Bioinformatics Conference, June 19-23, 202

Qubit-photon bound states in superconducting metamaterials

We study quantum features of electromagnetic radiation propagating in a one-dimensional superconducting quantum metamaterial composed of an infinite chain of charge qubits placed within two stripe massive superconducting resonators. The quantum-mechanical model is derived assuming weak fields and that, at low temperatures, each qubit is either unoccupied or occupied by a single Cooper pair. We demonstrate the emergence of two bands of single-photon qubit bound states with the energies lying outside the photon continuum—one is above and the second slightly below the linear photon band. The higher energy band varies slowly with the qubit-photon center of mass quasimomentum. It becomes practically flat provided that the electromagnetic energy is far below the Josephson energy when the latter is small compared to the charging energy. The dispersion of the lower band is practically identical to that of free photons. The emergence of bound states may cause radiation trapping indicating possible applicability for the control of photon transport in superconducting qubit-based artificial media

Prinos soje u ekstremnim godinama

The paper deals with the results of the varietal macro trials on soya in 2013 i 2014 at the location Aleksandrovac, micro trial with fertilizers at the location Aleksandrovac in 2014 and micro trial with fertilizers at the location Banja Luka in 2013. Both vegetation seasons have been characterised with very extreme weather conditions. Achieved yields (536 - 1.216 kg ha-1) in the varietal macro trial in very dry vegetation season 2013 were significantly lower than the yields (3.022 - 4.133 kg ha-1) in very rainy season in 2014. The traits of permeable, alluvial soil had dominant influence on the yield results in Aleksandrovac in the both years. The micro trials with the fertilizers were performed on the variety Sonja. Raising doses of fertilizer (MAP 100-200-300 kg ha-1, N10:P30:K20 200-300 -400 kg ha-1 and N15:P15:K15 200-400-600 kg ha-1) in 2014 did not result with economically justified grain yield increase. Similar results were obtained at the location Banja Luka in the previous year, what impose the need for more detailed study of this agrotechnical operation in the future.U radu su analizirani rezultati sortnih makroogleda na soji u 2013 i 2014. godini na lokalitetu Aleksandrovac, mikroogleda sa đubrenjem na navedenom lokalitetu u 2014. godini, te mikroogleda sa đubrenjem na lokalitetu Banja Luka u 2013. godini. Obe sezone karakterisale su vrlo ekstremne vremenske prilike. Ostvareni prinosi zrna (536 - 1.216kg ha-1) u sortnom makroogledu u vrlo sušnoj 2013. godini bili su značajno niži u odnosu na prinose (3.022 - 4.133 kg ha-1) u izuzetno kišnoj 2014. godini. Osobine propusnog, aluvijalnog zemljišta imale su presudan uticaj na prinose zrna u obe godine. Ogledi sa različitim đubrivima praćeni su na banjalučkoj sorti Sonja. Rastuće doze đubriva u 2014. godini nisu dovele do ekonomski opravdanog povećanja prinosa zrna u odnosu na kontrolu. Slični rezultati dobijeni su i u prethodnoj godini na lokalitetu Banja Luka, što upućuje na neophodnost detaljnijeg proučavanja ove agrotehničke mere

Effects of liming and nutrient management on yield and other parameters of potato productivity on acid soils in Montenegro

This study was conducted to evaluate the effect of liming (CaCO3 1000 kgha-1), and application of organic fertilizers (rotted farmyard manure 40 tha-1) and six different combination of mineral fertilizers: NPK 15:15:15 800 kgha-1 + KAN 240 kgha-1; NPK 15:15:15 400 kgha-1 + MCB (water- soluble mineral fertilizer NPK 13:11:20 + 2MgO + microelements + humic acid) 300 kgha-1 + KAN 125 kgha-1; MCB 400 kgha-1; MCB 400 kgha-1 + KMg (water-soluble mineral fertilizer Multi KMg 13:0:43 + 2MgO) 100 kgha-1; MCB 600 kgha-1 + KMg 100 kgha-1 and MCB 800 kgha-1 + KMg 100 kgha-1 on yield and other productivity parameters of potato (Kennebec variety). The experiments were carried out during 2015 and 2016 in the mountainous area of Montenegro, on acid-brown soil. The results obtained suggested that in both years, the highest values for all studied parameters were measured on plots with combined application of liming, organic and mineral fertilizers. In addition, a significant influence on the increase in the number of tubers per plant, the average tuber weight and the total yield was also demonstrated in all individual trials of potato nutrition, as well as the interaction of organic manure and mineral fertilizer. Fertilizing with rotted farmyard manure had significantly increased potato productivity, with the effect more pronounced in treatments with liming. The highest number of tubers (6.2 and 7.2), average tuber weight (93.5 g and 101.0 g) and yield (27.6 tha-1 in 2015 and 34.8 tha-1 in 2016, respectively) were obtained using combinations of MCB 800 kgha-1 + KMg 100 kgha-1 on variants fertilized with rotted farmyard manure and liming. Potato yield variations in productivity characteristics (average weight and number of tubers) ranged from 0.99911 (2015), to 0.99904 (2016). Multiple regression analysis showed that an increase in average weight and number of tubers in both examined years resulted in a statistically very significant increase in yield

Superconducting quantum metamaterial as photonic crystal

We study quantum features of electromagnetic radiation propagating in a waveguide built of an infinite array of super-conducting qubits (SCQ) placed within a resonator comprised of two massive superconductors. Such engineered media, so-called superconducting quantum metamaterials (SCQMM), have a great potential for quantum information processing and communications and devise a comprehensive study of the nature of the “light”-matter interaction. We predict the emergence of novel in-terference effects with possible practical applications. For exam-ple, photons may exhibit a nontrivial dispersion relation such as band edges and band gaps. In this way, QMMs may be viewed as photonic crystals. This, in turn, enriches their potential for practi-cal applications and provides novel means for devising compre-hensive studies of both practical and fundamental aspects of the interaction of artificial atoms and the EM field

Classification and existence of polarons and solitons in molecular chains: Phase diagram

The problem of the existence and stability of various types of self-trapped (ST) states (polarons) in 1-d molecular systems has been analysed within the framework of the general theory of self-trapping phenomena. An interpolation method is applied to cover the whole range of system parameters. In the system phase diagram we specify the areas where different ST states may exist. The role of the soliton mechanism in the energy and charge transport in biological systems has been critically revised on the basis of these results

Soliton-induced modification of the speed of sound in quasi-one-dimensional molecular crystals

The influence of the anharmonic vibron-phonon coupling, arising on account of a dressing effect, on the characteristics of the lattice subsystem in quasi-one-dimensional molecular crystals was examined within the pseudo-harmonic phonon approximation. It was found that solitons could induce specific modifications of the speed of sound which shows a temperature dependence quite different to that in the case of the linear excitations. The possibility of an indirect experimental verification of the existence of solitons in molecular chains is suggested on the basis of these predictions

Polaron induced modification of the speed of sound in quasi-one-dimensional molecular crystals

We study the possible influence of polaron effect on the phonon spectrum in quasi-one-dimensional molecular chains. It was found that polaron induced phonon correlations may lead to the characteristic modifications of the phonon frequencies and speed of sound which shows specific temperature dependence for particular type of polaron. (C) 2003 Elsevier B.V. All rights reserved

Classification and existence of polarons and solitons in molecular chains: Phase diagram

The problem of the existence and stability of various types of self-trapped (ST) states (polarons) in 1-d molecular systems has been analysed within the framework of the general theory of self-trapping phenomena. An interpolation method is applied to cover the whole range of system parameters. In the system phase diagram we specify the areas where different ST states may exist. The role of the soliton mechanism in the energy and charge transport in biological systems has been critically revised on the basis of these results