Interaction Effects on the Magneto-optical Response of Magnetoplasmonic Dimers

The effect that dipole-dipole interactions have on the magneto-optical (MO) properties of magnetoplasmonic dimers is theoretically studied. The specific plasmonic versus magnetoplasmonic nature of the dimer's metallic components and their specific location within the dimer plays a crucial role on the determination of these properties. We find that it is possible to generate an induced MO activity in a purely plasmonic component, even larger than that of the MO one, therefore dominating the overall MO spectral dependence of the system. Adequate stacking of these components may allow obtaining, for specific spectral regions, larger MO activities in systems with reduced amount of MO metal and therefore with lower optical losses. Theoretical results are contrasted and confirmed with experiments for selected structures

Morfogênese do capim-elefante adubado com composto orgânico proveniente de resíduos sólidos de pequenos ruminantes.

This study evaluated the biomass flow of irrigated Pennisetum purpureum cv. Cameroon fertilized with different levels of organic compost made from waste derived from production and slaughter of sheep and goat farming. The experiment was conducted in a cut and carry of elephant grass for four 60 day-cycles..

The oblique firehose instability in a bi-kappa magnetized plasma

In this work, we derive a dispersion equation that describes the excitation of the oblique (or Alfv\'en) firehose instability in a plasma that contains both electron and ion species modelled by bi-kappa velocity distribution functions. The equation is obtained with the assumptions of low-frequency waves and moderate to large values of the parallel (respective to the ambient magnetic field) plasma beta parameter, but it is valid for any direction of propagation and for any value of the particle gyroradius (or Larmor radius). Considering values for the physical parameters typical to those found in the solar wind, some solutions of the dispersion equation, corresponding to the unstable mode, are presented. In order to implement the dispersion solver, several new mathematical properties of the special functions occurring in a kappa plasma are derived and included. The results presented here suggest that the superthermal characteristic of the distribution functions leads to reductions to both the maximum growth rate of the instability and of the spectral range of its occurrence

Toxicidade induzida pela terapêutica intermitente com Rifampicina: Análise de um caso clínico

SUMMARYWe repport the case of a patient who developed a severe drug-induced hypersensitivity sistemic reaction to Rifampicin, that included a flulike syndrome, severe hemolytic anaemia, renal failure, shock and toxic epidermal necrolysis.Besides the clinical evolution we consider the difficulties in clinical diagnosis and the role of the in vitro laboratory assays

Implementation of the new multichannel X-mode edge density profile reflectometer for the ICRF antenna on ASDEX Upgrade

A new multichannel frequency modulated continuous-wave reflectometry diagnostic has been successfully installed and commissioned on ASDEX Upgrade to measure the plasma edge electron density profile evolution in front of the Ion Cyclotron Range of Frequencies (ICRF) antenna. The design of the new three-strap ICRF antenna integrates ten pairs (sending and receiving) of microwave reflectometry antennas. The multichannel reflectometer can use three of these to measure the edge electron density profiles up to 2 x 10(19) m(-3), at different poloidal locations, allowing the direct study of the local plasma layers in front of the ICRF antenna. ICRF power coupling, operational effects, and poloidal variations of the plasma density profile can be consistently studied for the first time. In this work the diagnostic hardware architecture is described and the obtained density profile measurements were used to track outer radial plasma position and plasma shape

Knockout of insulin-degrading enzyme leads to mice testicular morphological changes and impaired sperm quality

Insulin-degrading enzyme (IDE) is a zinc metalloprotease responsible for degrading and inactivating several bioactive peptides, including insulin. Individuals without this enzyme or with a loss-of-function mutation in the gene that codifies it, present hyperinsulinemia. In addition, impairment of IDE-mediated insulin clearance is associated with the development of metabolic diseases, namely prediabetes. Although insulin regulates male fertility, the role of IDE on male reproductive function remains unknown. We proposed to study the influence of IDE in the reproductive potential of males. As insulin mediates key events for the normal occurrence of spermatogenesis, we hypothesized that IDE functioning might be linked with sperm quality. We used C57BL/6N mice that were divided in three groups according to its genotype: wild type (WT), heterozygous and knockout (KO) male mice for Ide. Spermatozoa were collected from the cauda of epididymis and sperm parameters were evaluated. Testicular tissue morphology was assessed through hematoxylin and eosin stain. Mitochondrial complex protein levels and lipid peroxidation were also evaluated in the testicular tissue. Our results show that KO mice present a 50% decrease in testes weight compared to WT mice as well as a decrease in seminiferous tubules diameter. Moreover, KO mice present impaired sperm quality, namely a decrease in both sperm viability and morphology. These results provide evidence that IDE plays an important role in determining the reproductive potential of males.publishe

Avaliação nutricional do capim-elefante fertilizado com composto orgânico oriundo de resíduos da produção e abate de caprinos e ovinos?.

Resumo: Objetivou-se avaliar a composição química do capim-elefante adubado com crescentes doses de composto orgânico produzido a partir de resíduos da produção e abate de pequenos ruminantes. O delineamento foi em blocos casualizados com 6 tratamentos e 4 blocos, totalizando 24 parcelas, sendo aplicadas as seguintes doses (t ha-1): zero; 13,3; 26,6; 39,9; 53,2 e 79,8. Para a diagnose do estado nutricional do capim-elefante, coletou-se 7 amostras simples por parcela, em zigue-zague, de maneira aleatória. A região avaliada foi a primeira folha recém-expandida, sendo as amostras simples as plantas de uma mesma touceira, ao sexagésimo dia após o corte de uniformização. Avaliou-se a análise de macro e micronutrientes do capim-elefante. Houve efeito significativo para os macronutrientes primários nitrogênio, fósforo e potássio (NPK) e o micronutriente zinco. Conclui-se que a aplicação, na capineira, do composto orgânico proveniente de resíduos da produção e abate de pequenos ruminantes proporciona incremento nos teores foliares de N, P, K e Zn. [Evaluation of elephant grass fertilized with compound organic derived of production and slaugher of sheeps and goats]. Abstract: This study aimed to evaluate the nutritional status of elephant grass under doses of organic compound from production residue and slaughter of small ruminants after composting process. The experimental design was randomized blocks with 6 treatments and 4 blocks, total of 24 plots. The doses (t ha-1) applied were: zero; 13.3; 26.6; 39.9; 53.2 and 79.8. In order to diagnose the nutritional status of elephant grass we collected 40 single samples in random way in each plot. The chosen part was the first newly expanded leaf, and the single samples were plants of the same clump on the sixtieth day after the uniformity cut. We evaluated the chemical analysis of macronutrients and micronutrients in elephant grass. The results showed that there were significant effects on primary macronutrients nitrogen, phosphorus and potassium (NPK) and zinc micronutrient. The results show that the application of organic compound from production residue and slaughter of small ruminants provided an increase in the leaf levels of N, P, K and Zn

Mating system analysis and genetic diversity of Parkia multijuga Benth. one native tree Species of the Amazon.

The Amazonian native tree species Parkia multijuga has potential silvicultural characteristics that can be utilized to productive plantations. Understanding its mating system is necessary to delineate the methods for the breeding of the species, the collection of seeds for conservation, and the use of seedlings for production plantations. The aim of this study is to evaluate the mating system and population genetic diversity of P. multijuga, using molecular markers

False-negative reactions to the comparative intradermal tuberculin test for bovine tuberculosis.

According to the Brazilian National Program for the Control and Eradication of Animal Brucellosis and Tuberculosis (PNCEBT), the routine tests for the diagnosis of bovine tuberculosis in the country are the simple intradermal tuberculin test (SITT) of the Ministry of Agriculture, Livestock and Food Supply (MAPA), the caudal fold test and the comparative intradermal tuberculin test (CITT). The latter is also used as a confirmatory test. A group of 53 animals from three dairy herds in a focal area for bovine tuberculosis, that were submitted to depopulation in the state of Rio Grande do Sul, were submitted to the CITT. Tissues were cultured and the resulting colonies were confirmed by PCR and DNA sequencing. Among the 53 animals analyzed using the CITT, 32 (60.4%) were negative, 14 (26.4%) were positive and seven (13.2%) results were inconclusive. The CITT detected 11 of the 39 animals with culture-confirmed M. bovis infection as positive. Among the total of 14 uninfected animals based on cultures, the CBT detected eight as negative. Thus, the CITT demonstrated sensitivity of 28.2% and specificity of 57.1% for the population sampled. A total of 24/32 (75.0%) of the animals with negative CITT results were culture positive (confirmed by PCR) and were considered false negatives based on the CITT. The maintenance of these false-negative animals in herds has serious implications for the control of the disease, since they can be a source of infection. The addition of complementary tests could help identify such animals and increase the odds of diagnostic success.Título em português: Reações falso-negativas ao teste cervical comparativo para tuberculose bovina