782 research outputs found
Dark linear seesaw mechanism
We propose a minimal model where a dark sector, odd under a
discrete symmetry, is the seed of lepton number violation in the neutrino
sector at the loop level, in the context of the linear seesaw mechanism.
Neutrino mass suppression stems from a naturally small scalar potential
coupling which breaks the lepton number symmetry softly. The fact that we
consider (dark) Dirac vector-like neutral leptons, prevents the appearance of
other mass terms that could contribute to neutrino masses via alternative
mechanisms. We study the dark-matter phenomenology of the model, focusing on
the case in which the stable particle is the lightest neutral scalar arising
from the dark scalar sector. Prospects for testing our framework with the
results of current and future lepton flavour violation searches are also
discussed.Comment: 13 LaTeX pages, 3 figure
Pinto Beans (\u3ci\u3ePhaseolus vulgaris\u3c/i\u3e L.) as a Functional Food: Implications on Human Health
Most foods are considered functional in terms of providing nutrients and energy to sustain daily life, but dietary systems that are capable of preventing or remediating a stressed or diseased state are classified as functional foods. Dry beans (Phaseolus vulgaris L.) contain high levels of chemically diverse components (phenols, resistance starch, vitamins, fructooligosaccharides) that have shown to protect against such conditions as oxidative stress, cardiovascular disease, diabetes, metabolic syndrome, and many types of cancer, thereby positioning this legume as an excellent functional food. Moreover, the United States has a rich dry bean history and is currently a top producer of dry beans in the world with pinto beans accounting for the vast majority. Despite these attributes, dry bean consumption in the US remains relatively low. Therefore, the objective of this manuscript is to review dry beans as an important US agricultural crop and as functional food for the present age with an emphasis on pinto beans
Axion paradigm with color-mediated neutrino masses
We propose a generalized KSVZ-type axion framework in which colored fermions
and scalars act as two-loop Majorana neutrino-mass mediators. The global
Peccei-Quinn symmetry under which exotic fermions are charged solves the strong
CP problem. Within our general proposal, various setups can be distinguished by
probing the axion-to-photon coupling at helioscopes and haloscopes. We also
comment on axion dark-matter production in the early Universe.Comment: 15 LaTeX pages; 3 figure
Confronting the 95 GeV excesses within the UN2HDM
We consider the small excesses around 95 GeV found in several searches for a
new scalar in , and final states. Instead
of trying to accommodate them all, as is usually done in the literature, in the
context of a given Standard Model~(SM) extension, we investigate whether it
would be possible that one or two of these excesses correspond to an actual new
scalar, while the remaining ones are merely statistical fluctuations. To this
end, we use as benchmark model the UN2HDM, a SM extension with one scalar
doublet, one scalar singlet, and an extra symmetry, which has
been previously studied in the context of multiboson cascade decays. We show
that most of the possibilities where the excesses in one or two of these
channels disappear in the future can be accommodated by type-I or type-III
UN2HDMs.Comment: LaTeX 17 page
Customer service orientation on adhesion contracts
Hiring a service is a moment of great importance once it builds the perception of the service value and quality. Some companies may deal with that, assuming a greater importance when elaborating their service contracts. Usually law professional people elaborate these documents, but this may include legal attributes, not considering the service to the customers, as well as the customersâ point of view. In times of increasing on customer focus, market and service orientation, a question can be posted: to what extent company contracts show service or customer orientation? This paper compares the service orientation degree for Cable TV contracts from five companies, based on a theoretical model developed to this purpose. From a conceptual model for servant contract, four dimensions were assessed: physical aspects, reasonableness, intelligibility and customer focus. After subject evaluation by eight judges, analyzing the validation index (CVI), it was found that the contracts show moderate orientation to serve. Furthermore, results show that the five surveyed companyâs contracts showed a similar overall performance, i.e., none stood out over the other. The study presents important practical efficacy, because it can guide the Cable TV companies to adopt improvement strategies in elaboration of contracts, so that the contractual instruments be would reviewed of clauses that promote the sensation of better service to their customer. Thus, this article directs the manager to the aspect that deserves more attention, i.e, which dimensions require further refinement and direction to serv
Analytical characterization of the aroma of Tinta Negra Mole red wine: Identification of the main odorants compounds
A method for the simultaneous determination of major and minor volatiles composition in different types (dry, medium dry, sweet and medium sweet) of a young Tinta Negra Mole (TNM) monovarietal red wine from 2003 harvest has been validated. Wine samples preparation includes a dichloromethane liquidâliquid extraction followed by concentration under a nitrogen atmosphere. The extracted fraction was analysed by gas chromatographyâmass spectrometry and give quantitative information for more than 86 analytes whose concentration range from few Îźg lâ1 to 259.1 mg lâ1. The method enables high recovery of volatile compounds in wine good linearity with (r2) values higher than 0.980 and good sensitivity. The limits of detection range from 0.003 to 0.534 mg lâ1 and limits of quantification from 0.009 to 1.170 mg lâ1.
The method allows satisfactory determination of more than 80 compounds in the TNM red wines. These wines are characterized by a high content of higher alcohols, ethyl esters, fatty acids and lactones. The levels of sulphur compounds in Tinta Negra Mole medium sweet wines are very low, but they have the highest concentration of carbonyl compounds. Quantitative analysis of the main odorants followed by the determination of aroma index allow us elucidate the aroma of these varieties. On the basis of their odour description and odour threshold, the most powerful odorants of Tinta Negra Mole wines were tentatively established
Dietas contendo fenos de leucena ou estilosantes para cabras Anglo-Nubianas de tipo misto em lactação.
Com o intuito de avaliar dietas para cabras Anglo-Nubianas do tipo misto em lactação, foram utilizadas oito cabras com peso mĂŠdio 37,9 Âą 1,72 kg, entre a 2ÂŞ e 4ÂŞ ordem de lactação, no terço mĂŠdio da lactação, distribuĂdas em duplo quadrado latino 4 x 4. A ordenha foi realizada as 7 e 16 h. Os tratamentos consistiram de quatro dietas formuladas com diferentes volumosos (silagem de capim-elefante associada ou nĂŁo aos fenos de leucena ou de estilosantes) e milho em grĂŁo, acrescidas ou nĂŁo do farelo de soja
Palynological study of the endemic woody sonchus fron the flora of Madeira: a morphological and molecular approach
info:eu-repo/semantics/publishedVersio
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