Influence of Lorentz-violating terms on a two-level system

The influence of Lorentz- and CPT-violating terms of the extended Standard Model on a semi-classical two-level system is analyzed. It is shown that the Lorentz-violating background (when coupled with the fermion sector in a vector way) is able to induce modifications on the Rabi oscillation pattern, promoting sensitive modulations on the usual oscillations. As for the term involving the coefficient coupled in an axial vector way, it brings about oscillations both on energy states and on the spin states (implied by the background). It is also seen that such backgrounds are able to yield state oscillations even in the absence of the electromagnetic field. The foreseen effects are used to establish upper bounds on the Lorentz-violating coefficients.Comment: 13 pages, 6 figures, revtex style

Analysis of maize photosyntheis parameters and whole plant oxidative damage under long-term drought.

We test if maize maintain yield under long-term drought throught improvement of photosyntheis (A) coupled with up-regulation of the antioxidant system induced by increase in levels of abscisic acid (ABA). Four maize genotypes with constrasting drought tolerance: BRS1010 and 2B710 (sensitive) and DKB 390 and BRS1055 (tolerant) in two soil water levels, field capacity (FC) and water deficit (WD) were used. WD was applied at the pre-flowering stage for 12 days, and oxidative damage was measured as malondialdehyde (MDA) accumulation in whole plant. Plants from tolerant genotypes DKB390 and BRS1055 showed higher A and had no signal of oxidative damage compared to sensitive genotypes 2B710 and BRS1010 under WD, resulting in a higher yield attributes. For our surprising, it was dissociated from up-regulation of the antioxidant system ABA-mediated. In turn, plants from two sensitive genotypes under WD showed compared to FC consistent reduction of A due to mesophyll conductance (gm) limitation. Only WD plants from sensitive genotype BRS1010 presented leaf ABA levels increased related to its counterparts under FC; however, due to the inactivation of catalase activity the oxidative damage control was not effective, resulting a hardly MDA acumulation in both leaves and roots. The maize tolerance under long-term drought is linked to scape of gm decline

Análise de dinâmica de uso e de desempenho: o caso do web site da Embrapa Monitoramento por Satélite

A Embrapa Monitoramento por Satélite, há mais de uma década, utiliza a Internet como meio de difusão de resultados de pesquisa e de interação com clientes, parceiros e usuários. Com intuito de avaliar o uso do web site por esse público e o desempenho do sistema de comunicação eletrônica envolvido, tem-se utilizado o programa Webalizer, que monitora e elabora estatísticas de entradas e saídas do sistema, com base na análise de arquivos de log. Com os indicadores contabilizados pelo programa foi possível avaliar aspectos sobre a origem dos acessos, as ações executadas pelos usuários e sobre aspectos do desempenho do sistema em termos de respostas enviadas às solicitações dos usuários. Os resultados podem possibilitar a remodelagem do web site, de modo a melhorar a dinâmica de interação instituição-usuário e promover o desenvolvimento de uma abordagem própria de análise de logs

Uso e desempenho de web sites: um estudo de caso.

A Internet é um meio de comunicação remota, inovador, extremamente dinâmico e, cada vez mais, amplamente acessível, que tem adotado uma linguagem própria, inerente à sua natureza multimídia. A Embrapa Monitoramento por Satélite, há mais de uma década, utiliza a Internet como meio de difusão de resultados de pesquisa e de interação com clientes, parceiros e usuários. Com intuito de avaliar o uso do web site por esse público e o desempenho do sistema de comunicação eletrônica envolvido, tem-se utilizado o programa Webalizer que monitora e elabora estatísticas de entradas e saídas do sistema, com base na análise de arquivos de log. Através dos indicadores pelo programa foi possível avaliar aspectos sobre a origem dos acessos, as ações executadas pelos usuários e sobre aspectos do desempenho do sistema em termos de respostas enviadas às solicitações dos usuários. Os resultados podem possibilitar a remodelagem do web site, de modo a melhorar a dinâmica de interação instituição-usuário e promover o desenvolvimento de uma abordagem própria de análise de logs

Towars web site user's profile: log file analysis.

The Internet is a remote, innovative, extremely dynamic and widely accessible communication medium. As in all other human communication formats, we observe the development and adoption of its own language, inherent to its multimedia aspects. The Embrapa Satellite Monitoring is using the Internet as a dissemination medium of its research results and interaction with clients, partners and web site users for more than one decade. In order to evaluate the web site usage and performance of the e-communication system the Webalizer software has been used to track and to calculate statistics based on web server log file analysis. The objective of the study is to analyze the data and evaluate the indicators related to requests origin (search string, country, time), actions performed by users (entry pages, agents) and system performance (error messages). It will help to remodel the web site design to improve the interaction dynamics and also develop a customized log file analyser. This tool would retrieve coherent and real information

Saccharomyces cerevisiae and non-Saccharomyces yeasts in grape varieties of the São Francisco Valley.

The aims of this work was to characterise indigenous Saccharomyces cerevisiae strains in the naturally fermented juice of grape varieties Cabernet Sauvignon, Grenache, Tempranillo, Sauvignon Blanc and Verdejo used in the São Francisco River Valley, northeastern Brazil. In this study, 155 S. cerevisiae and 60 non-Saccharomyces yeasts were isolated and identified using physiological tests and sequencing of the D1/D2 domains of the large subunit of the rRNA gene. Among the non-Saccharomyces species, Rhodotorula mucilaginosa was the most common species, followed by Pichia kudriavzevii, Candida parapsilosis, Meyerozyma guilliermondii, Wickerhamomyces anomalus, Kloeckera apis, P. manshurica, C. orthopsilosis and C. zemplinina. The population counts of these yeasts ranged among 1.0 to 19 x 105 cfu/mL. A total of 155 isolates of S. cerevisiae were compared by mitochondrial DNA restriction analysis, and five molecular mitochondrial DNA restriction profiles were detected. Indigenous strains of S. cerevisiae isolated from grapes of the São Francisco Valley can be further tested as potential starters for wine production

Acute Effects of L-Arginine Supplementation on Oxygen Consumption Kinetics and Muscle Oxyhemoglobin and Deoxyhemoglobin during Treadmill Running in Male Adults

International Journal of Exercise Science 12(2): 444-455, 2019. L-arginine is used as a nitric oxide related supplement intended to improve sports performance, and to enhance muscular recovery during exercise. However, the literature is inconclusive. The aim of this study was to determine the effects of acute oral L-arginine supplementation on O2 consumption kinetics and local muscle blood volume and oxygenation during treadmill running at two different intensities. Using a double-blind, crossover and placebo-controlled design, 11 young healthy male adults were randomly assigned to 6 g of L-arginine (ARG) or placebo (PLA) supplementation that was ingested 60 min before the exercise test. Tests consisted of treadmill run at two different intensities (5 min each; moderate, 90% of ventilatory threshold, VT; and heavy, 50% of the difference between VT and VO2peak) interspersed by 1-min walking. Respiratory gas exchange variables were measured continuously with an automated metabolic cart. Near infrared spectroscopy (NIRS) was used to continuously monitor muscle oxyhemoglobin and deoxyhemoglobin and total hemoglobin. Blood samples were collected before supplementation and 6 min after exercise. Two-way repeated measures ANOVA did not show differences in plasma nitrite concentrations between ARG or PLA conditions during the running tests. No significant differences were observed between ARG and PLA conditions for O2 kinetics as well as for NIRS variables. ARG supplementation does not improve physiological responses associated with oxygen cost and NIRS variables during running treadmill tests. Hence, our results do not support the use of L-arginine as an ergogenic aid for running performance in young healthy males

The use of tire rubber in the production of high-performance concrete

The advances in concrete technology lead to the search for alternative materials that provide improvements in concrete properties while at the same time collaborating with sustainable practices in construction. In this study, the influence of the incorporation of waste tire rubber on the mechanical properties of high-performance concrete was discussed. The waste rubber from the tire retreading process was used in partial substitution of the fine aggregate (sand) in the percentages of 7.5%, 15% and 30% with respect to the mass of the sand. For the characterization of the concrete, the following tests were carried out: water absorption, void index, specific density, compressive strength, flexural tensile strength, modulus of elasticity and microscopy analysis. The incorporation of rubber as aggregate in high-performance concrete proved to be promising for the production of a structural concrete with special characteristics, besides collaborating with the proper disposal of waste tires651110114sem informaçã

Cardiospondylocarpofacial syndrome as a distinct hereditary connective tissue disorder: novel missense variant in MAP3K7 in two unrelated patients

CDKL5 deficiency disorder is a rare X-linked condition that results in early onset of impairedmotor and cognitive skills such as motor rigidity, stereotypical hand movements and deficient language acquisition aswell as recurrent seizures. It is caused by mutations in the cyclin-dependent kinase-like 5 (CDKL5) gene, which encodes a serine/threonine kinase involved in important neuronal processes such as cell signaling and neuron morphogenesis.FCT: UID/Multi/04326/2019 (CCMAR)info:eu-repo/semantics/publishedVersio

Effects of metoclopramide on the mouse anterior pituitary during the estrous cycle

Federal University of São PauloFederal University of São Paulo Gynecology DepartmentUniversidade de São Paulo Faculdade de MedicinaUNIFESP, Gynecology DepartmentSciEL