High-resolution Fourier-transform spectroscopy and deperturbation analysis of the A¹Π(v = 1) level in ¹²C¹⁸O

The A1Π(v = 1) level of the 12C18O isotopologue was precisely reinvestigated with two complementary spectroscopic techniques. High resolution B1Σ+ → A1Π(0, 1), (1, 1) and C1Σ+ → A1Π(0, 1) emission bands were recorded in the visible region, 20,700 – 26,100 cm−1, with a 1.71 m Fourier-transform spectrometer (Bruker IFS 125-HR) installed at the University of Rzeszów. The resulting line centre accuracy of isolated and medium to strong lines is 0.005 cm−1. In addition, high-resolution spectra of the A1Π ⟵ X1Σ+(1, 0), B1Σ+⟵ X1Σ+(0, 0) and (1, 0) as well as C1Σ+⟵ X1Σ+(0, 0) bands were recorded between 66,200 and 95,250 cm−1 using the vacuum-ultraviolet Fourier-transform spectrometer installed at the DESIRS beamline of the SOLEIL synchrotron. The wavenumber accuracy for isolated and strong spectral lines is 0.01 cm−1. A data set of 626 spectral lines belonging to seven bands was incorporated into a global deperturbation analysis. Significantly improved deperturbed molecular constants for the A1Π(v = 1), a´3Σ+(v = 10), D1Δ(v = 1), and I1Σ−(v = 2) levels, term values of the B1Σ+(v = 0, 1) and C1Σ+(v = 0) Rydberg states as well as the accompanying spin-orbit and rotation-electronic (L-uncoupling) interaction parameters were obtained. The experimental ro-vibrational term values of the A1Π(v = 1) level and its perturbers were also determined. The mixed composition of interacting states is expressed in terms of their 1Π percentage character

Effects of dietary supplementation with sage (Salvia officinalis L.) essential oil on antioxidant status and duodenal wall integrity of laying strain growers

The objective of this study was to compare the influence of four different concentrations of Salvia officinalis essential oil (EO) on animal health. A total of 50 laying strain chicks were randomly divided at the day of hatching into five dietary-treatment groups. Control group was given the basal diet (BD), the other four experimental groups contained BD supplemented with 0.1, 0.25, 0.5, 1.0 g S. officinalis EO/kg diet, respectively. 0.1 g/kg EO increased glutathion peroxidase activity (Gpx) in duodenal mucosa, liver and kidney, phagocytic activity in blood (PA), transepithelial electrical resistance (TEER) in duodenal tissue and decreased malondialdehyde (MDA) concentration in plasma and liver. 0.25 g/kg EO increased GPx in liver, total antioxidant status (TAS) in plasma, PA in blood and TEER in duodenal tissue. Our results demonstrate that lower concentrations of EO improve animals’ health status, and that it is necessary keep in mind the selection of sufficient concentration of EO used as animal feed additive

Deperturbation analysis of the A1Π(v = 2) level in the 12C18O isotopologue

© 2021 The Author(s)The rotational structure of the A1Π(v = 2) level of 12C18O is re-examined using high-accuracy experimental data comprised of 541 molecular lines obtained by two complementary Fourier-transform techniques. The absorption spectrum of the A1Π – X1Σ+(2, 0) band, in the range 66,500 - 67,650 cm–1, was recorded by the vacuum-ultraviolet FT spectrometer at the DESIRS beamline of the SOLEIL synchrotron. Visible emission spectra of the B1Σ+ – A1Π(0, 2) and C1Σ+ – A1Π(0, 2) bands in the range 19,200 - 20,000 and 24,300 - 24,800 cm–1 were obtained with a Bruker IFS-125HR spectrometer at the University of Rzeszów. The absolute accuracy of line frequencies are 0.01 and 0.005 - 0.01 cm−1, respectively. Results from the B1Σ+ – X1Σ+(0, 0) and C1Σ+ – X1Σ+(0, 0) absorption bands of 12C18O were added to the experimental data set. A deperturbation analysis of A1Π(v = 2) is performed with an effective Hamiltonian and a term-value fitting approach. Accurate molecular constants for A1Π(v = 2) and the e3Σ–(v = 4), d3Δ(v = 7), aʹ3Σ+(v = 12) and I1Σ–(v = 3) perturbing levels were determined. Perturbation parameters of the spin-orbit A1Π(v = 2) ~ [e3Σ–(v = 4), d3Δ(v = 7), aʹ3Σ+(v = 12)] and rotation-electronic (L-uncoupling) A1Π(v = 2) ~ [I1Σ–(v = 3, 4), D1Δ(v = 3)] interactions, were obtained. A significant, indirect influence of the a3Π state on the A1Π state was detected in 12C18O and has therefore been included in the final fit by taking into account the simultaneous a3Π(v = 13) ~ [e3Σ–(v = 4), d3Δ(v = 7), aʹ3Σ+(v = 12)] ~ A1Π(v = 2) spin-orbit/spin-electronic/L-uncoupling and spin-orbit interactions as well as the a3Π(v = 13) ~ [D1Δ(v = 3), I1Σ–(v = 3)] ~ A1Π(v = 2) spin-orbit and L-uncoupling interactions. This work results in determination of 110 rotational term-values for the A1Π(v = 2) state and its perturbers