Differential cross sections for nuclear fragment yields at an angle of 3.5° in the fragmentation of carbon ions with an energy of 0.95 and 2.0 GeV/nucleon on a beryllium target have been measured. ...The momentum spectra of the fragments were used for testing predictions of few models of ion-ion interactions.
•Ni salen-type polymers with polyanionic dopant show cationic transport.•Doping by PSS– anion leads to higher average length of the formed polymer chain.•IDE/EIS combination allows to separate ionic ...and electronic transport components.•Ionic transport is a limiting factor of the charge transport.
Intrinsically conductive polymer poly(N,N′-bis(3-methoxysalicylidene)ethylenediamine nickel(II)) (polyNi(CH3Osalen):PSS) has been synthesized by electrochemical polymerization from the Ni(CH3Osalen) solution containing tetrabutylammonium poly(styrenesulfonate) (TBAPSS). Cyclic voltammetry and in situ EQCM data demonstrated that electrochemical properties of polyNi(CH3Osalen):PSS are highly dependent on the nature of electrolyte solutions. A wider range of electrochemical activity, higher values of conductance and binary diffusion coefficient in TBAPSS solution are observed than in LiClO4, but the capacity values of films are higher in LiClO4 solution. The introduction of PSS− polyanion during synthesis of polymer film induced cationic mode of charge transport for polyNi(CH3Osalen). This type of PSS− doped polymers can be used as ion-exchange membranes.
The combined electrochemical impedance spectroscopy and in situ conductance measurements on interdigitated electrodes were analyzed using the model concepts of Matthias and Haas, and Einstein relation. This novel approach allowed separating the diffusion coefficient into its ionic and electronic constituents. The ionic diffusion was found to be the limiting factor. Strong association of lithium cation with both the PSS− polyanion and methoxy-groups may be the cause of lower values of diffusion coefficients in LiClO4 solutions. The proposed model is suitable for further studies of similar systems.
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Cytochrome c: the Achilles’ heel in apoptosis Kulikov, A. V.; Shilov, E. S.; Mufazalov, I. A. ...
Cellular and molecular life sciences : CMLS,
06/2012, Volume:
69, Issue:
11
Journal Article
Peer reviewed
Cytochrome
c
is a well-known mitochondrial protein that fulfills life-supporting functions by transferring electrons to the respiratory chain to maintain ATP production. However, during the ...activation of apoptotic machinery, it is released from mitochondria and, being in the cytosol, it either triggers the activation of the caspase cascade in intrinsic apoptotic pathway, or it is involved in the amplification of extrinsic apoptotic signaling. Accumulating evidence suggests that only unmodified holocytochrome
c
is efficient in the stimulation of apoptosis. Considering the importance of cytochrome
c
in both life and death, it was of significant interest to investigate the complete or partial cytochrome
c
deficiency in vivo. Here, we discuss the importance of distinct amino acid residues for various functions of cytochrome
c
in cells and mice with targeted cytochrome
c
mutations.
The experimental study of the flow structure behind the sudden expansion of the flat channel is performed. The cross section of the channel is 20×200 mm and the step height is 12 mm. Visualization of ...the flow structure and measurements by means of particle image velocimetry (PIV) is performed using high power green laser sheet and CCD camera. Liquid velocity profiles are measured by means of laser Doppler anemometry (LDA). Automatic position system is used. The structure of liquid flow distribution evolution behind the sudden channel expansion is shown. The data about pressure drop is presented for different liquid flow rates.
The convergence of bound-state calculations performed via the oscillator basis expansions by means of locating
-matrix poles for bound states within the HORSE and SS-HORSE approaches is examined. The ...convergence in question is studied both in the case of a sharp truncation of the potential matrix in the harmonic-oscillator space and in the case of smoothed matrix elements of the potential. As a result, a new method of extrapolation to the case of the infinite-dimensional model space is proposed. This method makes it possible to predict, on the basis of variational calculations, binding energies and asymptotic normalization coefficients for bound states to a high accuracy and to estimate the uncertainties of these predictions.
The results obtained for the energies of bound states of the
Li nucleus and for the respective asymptotic normalization coefficients, as well as for the energies and widths of its resonance states, ...by the SS-HORSE method on the basis of ab initio calculations within no-core shell model with Daejeon16 nucleon–nucleon interaction are presented.
Characteristics of movement of gas bubbles behind a sudden channel expansion were studied experimentally. The data on the distribution of the gas phase and speed of movement of bubbles were obtained. ...It is shown that at a distance from the sudden channel expansion the bubbles slow down, which relates to the slowing down of liquid due to an increase in the flow cross section. After the reattachment point, the bubbles move along a more curved path than upstream. It is shown that bubble clusters can form in the flow recovery zone. The velocity distribution in the channel was studied by means of laser Doppler anemometry (LDA).
As assemblies of genomes of new species with varying degrees of relationship appear, it becomes obvious that structural rearrangements of the genome, such as inversions, translocations, and ...transposon movements, are an essential and often the main source of evolutionary variation. In this regard, the following questions arise. How conserved are the regulatory regions of genes? Do they have a common evolutionary origin? And how and at what rate is the functional activity of genes restored during structural changes in the promoter region? In this article, we analyze the evolutionary history of the formation of the regulatory region of the
gene in different lineages of the genus
, as well as the participation of mobile elements in structural rearrangements and in the replacement of specific areas of the promoter region with those of independent evolutionary origin. In the process, we substantiate hypotheses about the selection of promoter elements from a number of frequently repeated motifs with different degrees of degeneracy in the ancestral sequence, as well as about the restoration of the minimum required set of regulatory sequences using a conversion mechanism or similar.
The article discusses the relationship between the calculated reactivity ρ = 1 – 1/
k
eff
obtained from steady-state calculations and its measured analog. In VVER reactors, the measured reactivity is ...determined from the readings of a reactivity meter that processes IC current using the inverse point kinetics equation. In the article, a relation is established between the reactivity obtained from steady-state calculations and readings of a reactivity meter using the solutions of adjoint problems. By examples of measurements of the efficiency of emergency rods in VVER reactors, it is shown that the approach considered in the article is useful.
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