Investigation of alpha-nuclear potential families from elastic scattering experiments

In this work we present the continuation of the reported analysis [1] of the experimentally measured angular distributions of the reaction Cd-106(alpha, alpha)Cd-106 at several different energies around the Coulomb barrier. The difficulties that arise in the study of Cd-106-alpha-nuclear potential and the so called Family Problem are addressed

Cymantrene–Triazole "Click" Products: Structural Characterization and Electrochemical Properties

We report the first known examples of triazole-derivatized cymantrene complexes (η5-[4-substituted triazol-1-yl]cyclopentadienyl)tricarbonylmanganese(I), obtained via a “click” chemical synthesis, bearing a phenyl, 3-aminophenyl, or 4-aminophenyl moiety at the 4-position of the triazole ring. Structural characterization data using multinuclear NMR, UV–vis, ATR-IR, and mass spectrometric methods are provided, as well as crystallographic data for (η5-[4-phenyltriazol-1-yl]cyclopentadienyl)tricarbonylmanganese(I) and (η5-[4-(3-aminophenyl)triazol-1-yl]cyclopentadienyl)tricarbonylmanganese(I). Cyclic voltammetric characterization of the redox behavior of each of the three cymantrene–triazole complexes is presented together with digital simulations, in situ infrared spectroelectrochemistry, and DFT calculations to extract the associated kinetic and thermodynamic parameters. The trypanocidal activity of each cymantrene–triazole complex is also examined, and these complexes are found to be more active than cymantrene alone

High precision 113In(α,α)113In elastic scattering at energies near the Coulomb barrier for the astrophysical γ process

Background: The γ process in supernova explosions is thought to explain the origin of proton-rich isotopes between Se and Hg, the so-called p nuclei. The majority of the reaction rates for γ process reaction network studies have to be predicted in Hauser-Feshbach statistical model calculations using global optical potential parametrizations. While the nucleon+nucleus optical potential is fairly well known, for the α+nucleus optical potential several different parametrizations exist and large deviations are found between the predictions calculated using different parameter sets.Purpose: By the measurement of elastic α-scattering angular distributions at energies around the Coulomb barrier a comprehensive test for the different global α+nucleus optical potential parameter sets is provided. Methods: Between 20∘ and 175∘ complete elastic alpha scattering angular distributions were measured on the 113In p nucleus with high precision at Ec.m.=15.59 and 18.82 MeV. Results: The elastic scattering cross sections of the 113In(α,α)113In reaction were measured for the first time at energies close to the astrophysically relevant energy region. The high precision experimental data were used to evaluate the predictions of the recent global and regional α+nucleus optical potentials. Parameters for a local α+nucleus optical potential were derived from the measured angular distributions. Conclusions: Predictions for the reaction cross sections of 113In(α,γ)117Sb and 113In(α,n)116Sb at astrophysically relevant energies were given using the global and local optical potential parametrizations.Peer reviewe

Influência do resíduo líquido do sisal (Agave sisalana, Perrine) sobre a eclosão de ovos e o desenvolvimento larvar, in vitre, de nematóides gastrintestinais de ovinos.

A utilização do sisal na obtenção de produtos com ação antiparasitária é uma alternativa de diversificação da exploração do setor agropecuário. O objetivo deste estudo foi avaliar a ação do resíduo líquido de Agave sisalana sobre o desenvolvimento, in vitro, de nematóides gastrintestinais de ovinos. O resíduo líquido das folhas de A. sisalana obtido pelo processo de desfibramento, foi utilizado nos testes de eclosão de ovos (TEO) e desenvolvimento larvar (TDL) de nematóides gastrintestinais (NGI) de ovinos. Houve inibição da eclosão de ovos e o percentual de inibição aumentou significativamente (p<0,05) com o aumento da concentração do resíduo do sisal. As CE50 e CE95 para inibição da eclosão de ovos foram, respectivamente, 6,78 e 23,06mg/mL. A inibição do desenvolvimento de larvas no TDL variou entre zero e 100%. Os testes in vitro utilizados para avaliar a ação do resíduo líquido da folha da A. sisalana sobre ovos e larvas de NGI demonstram o potencial antiparasitário do sisal

The bright optical afterglow of the long GRB 001007

We present optical follow up observations of the long GRB 001007 between 6.14 hours and ~468 days after the event. An unusually bright optical afterglow (OA) was seen to decline following a steep power law decay with index alpha = -2.03 +/- 0.11, possibly indicating a break in the light curve at t - to < 3.5 days, as found in other bursts. Upper limits imposed by the LOTIS alerting system 6.14 hours after the gamma ray event provide tentative (1.2 sigma) evidence for a break in the optical light curve. The spectral index beta of the OA yields -1.24 +/- 0.57. These values may be explained both by several fireball jet models and by the cannonball model. Fireball spherical expansion models are not favoured. Late epoch deep imaging revealed the presence of a complex host galaxy system, composed of at least two objects located 1.2" (1.7 sigma) and 1.9" (2.7 sigma) from the afterglow position.Comment: 7 pages, 5 figures, published in A&

Influência do resíduo líquido do sisal (Agave sisalana, Perrine) sobre a alimentação larvar e motilidade de adultos, in vitro, de nematóides gastrintestinais de pequenos ruminantes.

A utilização do sisal na obtenção de produtos com ação antiparasitária é uma alternativa de diversificação da exploração do setor agropecuário. O objetivo deste estudo foi avaliar a ação do resíduo líquido de Agave sisalana sobre o desenvolvimento, in vitro, de nematóides gastrintestinais de pequenos ruminantes. O resíduo líquido das folhas de A. sisalana obtido pelo processo de desfibramento, foi utilizado nos testes de inibição da alimentação larval (TIAL) e motilidade de adultos (TMA) de nematóides gastrintestinais (NGI) de ovinos e caprinos, respectivamente. A inibição do desenvolvimento e da alimentação de larvas foi de 100%, após a exposição, igualou superior, a 0,12 mg/mL do resíduo. No teste de motilidade de adultos a inibição foi de 100% para concentração de 75 mg/mL, com 24h, e para 37 mg/mL e 18 mg/mL, com 48h.Os testes in vitro utilizados para avaliar a ação da seiva da folha da A. sisalana sobre larvas e adultos de NGI demonstraram o seu potencial antiparasitário

Association of ADAMTS7 gene polymorphism with cardiovascular survival in coronary artery disease

Recent genetic studies have revealed an association between polymorphisms at the ADAMTS7 gene locus and coronary artery disease (CAD) risk. Functional studies have shown that a CAD-associated polymorphism (rs3825807) affects ADAMTS7 maturation and vascular smooth muscular cell (VSMC) migration. Here, we tested whether ADAMTS7 (A/G) SNP is associated with cardiovascular (CV) survival in patients with established CAD. A cohort of 1,128 patients with angiographic proven CAD, who were followed up prospectively for a mean follow-up period of 63 (range 6-182) mo, were genotyped for rs3825807 A/G. Survival statistics (Cox regression) compared heterozygous (AG) and wild-type (AA) with the reference homozygous GG. Kaplan-Meier (K-M) survival curves were performed according to ADAMTS7 genotypes for CV mortality. Results showed that 47.3% of patients were heterozygous (AG), 36.5% were homozygous for the wild-type allele (AA) and only 16.2% were homozygous for the GG genotype. During the follow-up period, 109 (9.7%) patients died, 77 (6.8%) of CV causes. Survival analysis showed that AA genotype was an independent risk factor for CV mortality compared with reference genotype GG (HR = 2.7, P = 0.025). At the end of follow-up, the estimated survival probability (K-M) was 89.8% for GG genotype, 82.2% for AG and 72.3% for AA genotype (P = 0.039). Carriage of the mutant G allele of the ADAMTS7 gene was associated with improved CV survival in patients with documented CAD. The native overfunctional ADAMTS7 allele (A) may accelerate VSMC migration and lead to neointimal thickening, atherosclerosis progression and acute plaque events. ADAMTS7 gene should be further explored in CAD for risk prediction, mechanistic and therapeutic goals.info:eu-repo/semantics/publishedVersio