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- L Chen, P Sharma, J Le Gall, A M Mariano, M Teixeira, A V Xavier
- European journal of biochemistry
- 1994

A novel iron-containing blue protein, named neelaredoxin, was isolated from the sulfate-reducing bacterium Desulfovibrio gigas. It is a monomeric protein with a molecular mass of 15 kDa containing two iron atoms/molecule. The N-terminal sequence of neelaredoxin has similarity to the second domain of desulfoferrodoxin, a protein purified from Desulfovibrio… (More)

The cross section for electron scattering by nuclei at high momentum transfers, is calculated within a new version of the plane wave impulse approximation (PWIA). Binding effects on the struck nucleon are introduced through the relativistic mean field theory (MFT). The model naturally satisfies current conservation, since the response tensor for an… (More)

- A. Mariano
- 2000

A dynamical model based on effective Lagrangians is proposed to describe the bremsstrahlung reaction πN → πNγ at low energies. The ∆(1232) degrees of freedom are incorporated in a way consistent with both, electromagnetic gauge invariance and invariance under contact transformations. The model also includes the initial and final state rescattering of… (More)

- A. Mariano, C. Barbero
- 2004

The high momentum transfer electron-nucleus scattering cross section is evaluated within the plane wave impulse approximation (PWIA) supplemented by the relativistic Hartree approximation (RHA). Binding effects on the struck nucleon are introduced through the scalar and vector meson-exchange fields within the framework of quantum hadrodynamics. This model… (More)

We study normalization problems associated with use of perturbatively correlated groundstates in extended RPA schemes in the context of a specific but typical example. The sensitivity of the results to the amount of 2p2h admixtures to the correlated ground state is also investigated in terms of a modification of the standard perturbative approach. PACS… (More)

We have extended the formalism for the two-neutrino double beta decay by including the weak-magnetism term, as well as other second-forbidden corrections. The weak magnetism diminishes the calculated half-lives in ∼ 10%, independently of the nuclear structure. Numerical computations were performed within the pn-QRPA, for Ge, Se, Mo, Te and Te nuclei. No one… (More)

The computer code developed by our group some years ago for the evaluation of nuclear matrix elements, within the QRPA and PQRPA nuclear structure models, involved in neutrino-nucleus reactions, muon capture and β± processes, is extended to include also the nuclear double beta decay.

- F Krmpoti´c, T T S Kuo, +4 authors Argentina
- 1996

Abstract The effect of the inclusion of ground state correlations into the QRPA equation of motion for the two-neutrino double beta (ββ2ν) decay is carefully analyzed. The resulting model, called renormalized QRPA (RQRPA), does not collapse near the physical value of the nuclear force strength in the particle-particle channel, as happens with the ordinary… (More)

- A. Mariano, F. Krmpotić
- 1995

It is shown that the norm corrections, introduced to avoid the violation of the constraints on the depletion of the hole states in the standard perturbative 2p2h approach, leads in nuclear matter to a dependence of the momentum distribution with the total nucleon number. This unphysical behavior, which in turn makes the depletion to be non-extensive, arises… (More)

- E. L. Santos, B. Leite, A. Mariano
- LASCAS
- 2015

In this paper, a power amplifier (PA) with gain control is presented for 2.4 GHz applications. The power gain can be digitally controlled in six steps by the combination of three bits. This technique was used to control power gain and to achieve an improvement in efficiency at power backoff. The design was implemented using a 0.13 μm CMOS technology and is… (More)