TOI-969: a late-K dwarf with a hot mini-Neptune in the desert and an eccentric cold Jupiter

Context. The current architecture of a given multi-planetary system is a key fingerprint of its past formation and dynamical evolution history. Long-term follow-up observations are key to complete their picture. Aims. In this paper, we focus on the confirmation and characterization of the components of the TOI-969 planetary system, where TESS detected a Neptune-size planet candidate in a very close-in orbit around a late K-dwarf star. Methods. We use a set of precise radial velocity observations from HARPS, PFS, and CORALIE instruments covering more than two years in combination with the TESS photometric light curve and other ground-based follow-up observations to confirm and characterize the components of this planetary system. Results. We find that TOI-969 b is a transiting close-in (Pb ∼ 1.82 days) mini-Neptune planet (Formula Presented), placing it on the lower boundary of the hot-Neptune desert (Teq,b = 941 \ub1 31 K). The analysis of its internal structure shows that TOI-969 b is a volatile-rich planet, suggesting it underwent an inward migration. The radial velocity model also favors the presence of a second massive body in the system, TOI-969 c, with a long period of (Formula Presented) days, a minimum mass of (Formula Presented), and a highly eccentric orbit of (Formula Presented). Conclusions. The TOI-969 planetary system is one of the few around K-dwarfs known to have this extended configuration going from a very close-in planet to a wide-separation gaseous giant. TOI-969 b has a transmission spectroscopy metric of 93 and orbits a moderately bright (G = 11.3 mag) star, making it an excellent target for atmospheric studies. The architecture of this planetary system can also provide valuable information about migration and formation of planetary systems

Composition and intra-annual variation of the macroinfauna in the estuarine zone of the Pando Stream (Uruguay)

We studied the temporal patterns of macroinfaunal distribution in the estuarine portion of Pando Stream, Uruguay. We found a very low number of species and a high dominance of the polychaete Heteromastus similis. There were clear seasonal patterns in abundance with almost all species peaking in autumn, coinciding with the periods of higher salinity. Minimal values were found in winter and spring when salinity was at a minimum. We suggest that the seasonal pattern is a consequence of the combined effects of recruitment, and of high osmotic stress and disturbance during the periods of freshwater discharge that are common in winter and spring

Diversity of culturable marine bacteria on the coastline of the central area of San Jorge Gulf, Argentina

This study aims to isolate and identify culturable marine bacteria from 4 locations in the San Jorge Gulf. A total of 1,532 strains were isolated using oligotrophic, heterotrophic and hydrocarbon- degrading bacteria media, and identified with reference to bacterial fatty acid methyl ester (FAME) profiles. Gram-negative bacteria were the most abundant, Pseudoalteromonas comprised 17% of the isolated bacteria, followed by Pseudomonas, with 11.14%. The Gram-positive bacteria genera identified were Staphylococcus, Bacillus and Micrococcus. In addition, those bacteria able to degrade hydrocarbons were: Arthrobacter, Dietzia, Acinetobacter, Microbacterium, Micrococcus, Bacillus, Pseudomonas and Pseudoalteromonas

Uso de harina de cabeza de camar\uf3n como reemplazo proteico de harina de pescado en dietas balanceadas para juveniles de Totoaba macdonaldi (Gilbert, 1890)

En dietas para juveniles de Totoaba macdonaldi (26,3 ± 4,7 g y 13,6 ± 1 cm) se evaluó la sustitución proteica parcial de harina de pescado (HP) por harinas de cabeza de camarón (HCC), sobre su crecimiento, sobrevivencia, factor de conversión alimenticia (FCA) y composición química de tejidos, y el coeficiente de digestibilidad aparente de materia seca (CDA), proteínas (CDAP) y lípidos (CDAL) de estas dietas. Se utilizó HCC de cabezas enteras deshidratadas al sol (F) y HCC de cabezas maceradas y deshidratadas en secador de aire (M). Las dietas fueron isoproteicas (55,5% de proteína cruda), isolipídicas (15% de lípidos) e isoenergéticas (4,6 Kcal g-1) remplazando el 0% (dieta control; DC), 15% (F15 y M15) y 30% (F30 y M3ü) de la proteína de la HP por la de HCC. Después de 57 días la sobrevivencia con HCC (99.44 ± 1.92%) fue mayor que DC (88,89 ± 3,85%). El peso ganado, crecimiento específico en peso (TCE) y el consumo total no presentaron diferencias estadísticas (P > 0,05) entre los organismos alimentados con HCC. No obstante, la dieta M30 presentó un promedio mayor en TCE (0,99 ± 0,06) y crecimiento (19,82 ± 1.64 g/pez). La dieta M30 significativamente tuvo la mejor FCA (1,61 ± 0,13) y las más altas CDA (66,18 ± 1,28), CDAP (86,51 ± 0,53) y CDAL (72,29 ± 1,10). Se concluye que la sustitución proteica de HP por HCC en alimento para juveniles de totoabas mejoró los parámetros productivos y los CDAs, obteniéndose mejores resultados con la inclusión de HCC macerada y niveles de sustitución de 30%

Karu-INIA, nuevo cultivar de papa para Chile

Karu-INIA is a new potato ( Solanum tuberosum L.) cultivar, created from a cross between the cultivars Yagana-INIA x Fanfare by the Potato Breeding Program of the National Agricultural Research Institue (INIA), at the Remehue Regional Research Center, Osorno, Chile, in 1989. It is a semi-erect plant, with vigorous growth, a medium to large size, long oval-shaped tuber, red skin and clear yellow flesh. It is a high yielding cultivar and adapts well to the majority of the potato production areas and crop seasons in Chile. It is preferred for fresh consumption, although it has fairly good frying quality, similar to Yagana-INIA.Karu-INIA es un nuevo cultivar de papa ( Solanum tuberosum L.) creado a partir del cruzamiento Yagana-INIA x Fanfare, por el Programa de Mejoramiento Gen\ue9tico de la Papa del Instituto de Investigaciones Agropecuarias (INIA), en el Centro Regional de Investigaci\uf3n Remehue, Osorno, el a\uf1o 1989. Es una planta semi erecta, de buen vigor, con tub\ue9rculos de tama\uf1o medio a grande, uniformes, de forma oval alargada, piel roja y pulpa amarilla clara. Posee altos rendimientos y se adapta bien a la mayor\ueda de las zonas y \ue9pocas de cultivo de la papa en Chile. Su uso preferente es para consumo fresco, aunque produce una fritura de calidad altamente aceptable, similar a Yagana-INIA

Proton and neutron alignments in the doubly odd nucleus 76Br

High-spin states in the doubly odd nucleus 76Br have been investigated using the 55Mn(30Si,2\u3b1n) reaction at a beam energy of 130 MeV. Five bands have been established to high spin. The features of the level scheme, particularly the signature inversion and the band crossings in the yrast band as well as proton and neutron alignments in the negative-parity bands, are discussed in the framework of the cranked shell model

Influence of valence neutron configuration on quadrupole deformation in doubly-odd 134Pr

Lifetimes of levels in two doubly-decoupled bands of 134Pr involving neutron intruder orbits have been measured using Doppler-shift techniques. The deduced transition quadrupole moments are consistent with total Routhian surface predictions for the suggested configurations of both bands. The negative-parity band with one neutron in the i13/2 orbit has a much larger quadrupole deformation than the positive-parity band with a neutron in the (f7/2/h9/2) orbit, reflecting the strong polarizing effect of the N=6 intruder orbit on the nuclear shape