1,223 research outputs found
Microbiome profiling reveals a microbial dysbiosis during a natural outbreak of tenacibaculosis (Yellow Mouth) in Atlantic salmon
No full textTenacibaculosis remains a major health issue for a number of important aquaculture species globally. On the west coast of Canada, yellow mouth (YM) disease is responsible for significant economic loss to the Atlantic salmon industry. While Tenacibaculum maritimum is considered to be the primary agent of clinical YM, the impact of YM on the resident microbial community and their influence on the oral cavity is poorly understood. Using a 16s rRNA amplicon sequencing analysis, the present study demonstrates a significant dysbiosis and a reduction in diversity of the microbial community in the YM affected Atlantic salmon. The microbial community of YM affected fish was dominated by two amplicon sequence variants (ASVs) of T. maritimum, although other less abundant ASVs were also found. Interestingly clinically unaffected (healthy) and YM surviving fish also had a high relative abundance of T. maritimum, suggesting that the presence of T. maritimum is not solely responsible for YM. A statistically significant association was observed between the abundance of T. maritimum and increased abundance of Vibrio spp. within fish displaying clinical signs of YM. Findings from our study provide further evidence that YM is a complex multifactorial disease, characterized by a profound dysbiosis of the microbial community which is dominated by distinct ASVs of T. maritimum. Opportunistic taxa, including Vibrio spp., may also play a role in clinical disease progression.Commonwealth Scientific and Industrial Research OrganisationCanada Excellence Research ChairsUniversity of Prince Edward Islan
A class of Frattini-like subgroups of a finite group
No full textAbstractLet G be a finite group and π a set of primes. We consider the families of subgroups of G:F1 = {M: M ⋖ G, |G : M|π = 1}F2 = {M: M ⋖ G, |G : M|π = 1, |G : M| is composite}. Denote Φπ(G) = ∩ {M: M ϵ F1} if F1 is nonempty, otherwise Φπ(G) = G and Sπ (G) = ∩ {M: M ϵ F2} if F2 is nonempty, otherwise Sπ(G) = G. The purpose of this paper is to investigate these subgroups further
Resonant coupling of a SQUID to a mechanical resonator
No full textWe analyze the properties of a mechanical resonator embedded into a quantum SQUID and analyze under which conditions it is possible to realize a resonant coupling between the SQUID and the resonator. We find, within the present technology, how it is possible to tune the system into the regime where the plasma frequency of the SQUID matches the resonator frequency and maximizes the corresponding coupling. In these conditions the doubly degenerate quantum level of the system is split by the coupling between the SQUID and the resonator.QN/Quantum NanoscienceApplied Science
Detecting phonon blockade with photons
No full textMeasuring the quantum dynamics of a mechanical system, when few phonons are involved, remains a challenge. We show that a superconducting microwave resonator linearly coupled to the mechanical mode constitutes a very powerful probe for this scope. This new coupling can be much stronger than the usual radiation pressure interaction by adjusting a gate voltage. We focus on the detection of phonon blockade, showing that it can be observed by measuring the statistics of the light in the cavity. The underlying reason is the formation of an entangled state between the two resonators. Our scheme realizes a phonotonic Josephson junction, giving rise to coherent oscillations between phonons and photons as well as a self-trapping regime for a coupling smaller than a critical value. The transition from the self-trapping to the oscillating regime is also induced dynamically by dissipation.QN/Quantum NanoscienceApplied Science
Atrial fibrillation and heart failure in cardiology practice: reciprocal impact and combined management from the perspective of atrial fibrillation: results of the Euro Heart Survey on atrial fibrillation.
No full textAllegory and Symbolism in the Scarlet Letter
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina. Centro de Comunicação e ExpressãoEste trabalho tem por objetivo descrever as causas subjacentes ao complexo sentido do romance the Scarlet Letter, de Hawthorne. Tenta mostrar que este sentido é produzido pela tensão não resolvida entre duas forças contraditórias - alegoria e simbolismo. A alegoria é um dispositivo retórico tradicional que reduz toda a realidade a noções claras e unilaterais. Ela tende assim, a concentrar o sentido num único enunciado
Improving the engineering strength of heat strengthened glass
No full textAlthough glass is increasingly used as a structural material, glass is not produced to strength standards, like steel and concrete. Of the three types of glass: annealed, heat strengthened and fully tempered, only heat strengthened glass has the properties to function as a safe structural material. These properties are strength, resistance to stress corrosion cracking, and controlled fragmentation. In this paper the factors controlling the strength of heat strengthened glass are assessed. The dominant influence is the spread in compressive pre-strength. Opportunities for quality control of the compressive pre-strength are analysed using experimental results. The consequences for the predictability of the strength and the requirements for quality controlled are discussed
Morphological character evolution of Amorphophallus (Araceae) based on a combined phylogenetic analysis of trnL, rbcL, and LEAFY second intron sequences
No full textSequences of three different genes in 69 taxa of Amorphophallus were combined to reconstruct the molecular phylogeny of this species-rich Aroid genus. The data set was analyzed by three different methods, Maximum Parsimony, Maximum Likelihood and Bayesian analysis, producing slightly different tree topologies. Three major clades identified in all analyses reflect the biogeographical distribution of Amorphophallus. Some clades were supported by morphological characters such as sessile/nonsessile stigma, pollen opening mechanism, shape of the main segments of the lamina, growth cycle, and berry colour. When optimised, a nonsessile stigma may have evolved from a sessile one with several reversals. Pollen opening by connective rupturing evolved from pollen opening by pores. Unequally shaped segments of the lamina evolved from equally shaped segments. Simultaneously existing leaf and inflorescences evolved from alternating leaves and inflorescences. Blue, purple, green, and yellow berries evolved from red/orange/white ones
Modelling of Bifacial Gain for Stand-alone and in-field Installed Bifacial PV Modules
No full textAbstractBifacial solar cells enable the absorption of light also by the cell's rear side, hence increasing the energy yield of a bifacial module, Yb compared to the energy yield of a monofacial module installed under the same conditions, Ym, by BG = (Yb - Ym) / Ym, the bifacial gain. This contribution presents a simulation model for the prediction of the BG of bifacial PV modules (stand-alone and integrated in a PV field). The model has been implemented as a software tool and the results obtained by applying the tool to various relevant system configurations (ground albedo, geographical locations, module height and tilt, diffuse irradiation fraction) are shown. These results allow to determine the optimum installation parameters for highest BG for a given installation site. Finally, the tool is validated by comparing the simulated results with the actual BG monitored on bifacial modules during several months on an outdoor testing site
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