Toxin-antitoxin (TA) systems are widespread among bacterial chromosomes and mobile genetic elements. Although in plasmids TA systems have a clear role in their vertical inheritance by selectively killing plasmid-free daughter cells (postsegregational killing or addiction phenomenon), the physiological role of chromosomally encoded ones remains under debate. The assumption that chromosomally enc...

Electrochemically triggered self-assembly can be effectively utilized to produce electroactive materials of tailored properties for various applications, such as sensor development. Here, we present a thin film based on tannic acid (TA) and silver nanoparticles (AgNPs), ionically imprinted via electrodeposition tailor-designed electrochemical tracing aluminum ions, Al(III). In the first stage, ...

Characterization of LiM-doped (M = V, Nb, Ta, or Zr) piezoelectric aluminum nitride ((LiyM1−y)xAl1−xN) was performed by first-principles calculations and experimental approaches. The calculation results show that for all (LiyM1−y)xAl1−xN, coefficient d33,f is increased increasing the LiM doping concentration x up to 0.25. In comparison results, reveal only (LiyNb1−y)xAl1−xN has d33. absolute va...

L(X) = i cpi(X)(f/ +E,). ,=t The problem is to find p,(x) such that: (1) if a, = 0 then I/f,, -f/l -+ 0, n + co; (2) if &= C,,, then D[f, -f] 0 is a certain number. We find {cpj}, 1 < j < n, optimal, in a certain sense. Namely, if s, = 0, then ‘p/ are found from the requirements: (A) Cj’=, v,(x) ji $,dv= 1, !I: CC=, v,(x) $ji(Y)J2 (x-YY dy=min. Note that (A)i v,(x) G,(Y) = 6,(x, ...

We report on the analytical performance of a tetrahedral amorphous carbon (ta-C:N) thin-film electrode in flow injection analysis with amperometric detection. Two model redox analytes were used to evaluate the electrode response because of their positive detection potentials and propensity (i.e., reaction products) to adsorb and foul sp2 carbon electrodes: tyrosine and tryptophan. ta-C:N electr...

Based on first-principles density functional theory calculations, we explore the electronic and magnetic properties of experimentally producible sandwiches and infinite wires made of repeating benzene molecules and transition-metal atoms of V, Nb, and Ta. We describe the bonding mechanism in the molecules and in particular concentrate on the origin of magnetism in these structures. We find that...

Single crystals of RbBaTaS4 (1) and K2BaTa2S11 (2) were obtained from the reactions of Ta, with in situ formed fluxes of A2S3 (A = K, Rb), BaS, and S at 500 ◦C. Compound 1 crystallizes in the orthorhombic space group Pnma with a = 9.3286(5), b = 7.0391(4), c = 12.4365(7) Å,V = 816.6(1) Å3, Z = 4. Compound 2 crystallizes in the monoclinic space group P21/c with a = 14.5280(10), b = 12.6347(7), c...