Vortex-antivortex annihilation dynamics in a square mesoscopic superconducting cylinder

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Evaluation of Torque Maintenance of Abutment and Cylinder Screws With Morse Taper Implants

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Temperature-dependent vortex motion in a square mesoscopic superconducting cylinder: Ginzburg-Landau calculations

In this work we investigate the dynamics of vortices in a square mesoscopic superconductor. As time evolves we show how the vortices are nucleated into the sample to form a multivortex, single vortex, and giant vortex states. We illustrate how the vortices move around at the transition fields before they accommodate into an equilibrium configuration. We also calculate the magnetization and the free energy as functions of the applied magnetic field for several values of temperature. In addition, we evaluate the upper critical field.

Law of large numbers for certain cylinder flows

We construct new examples of cylinder flows, given by skew product extensions of irrational rotations on the circle, that are ergodic and rationally ergodic along a subsequence of iterates. In particular, they exhibit a law of large numbers. This is accomplished by explicitly calculating, for a subsequence of iterates, the number of visits to zero, and it is shown that such number has a Gaussian distribution.

Properties of Mortar Using Cubes, Prism Halves, and Cylinder Specimens

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

MOISTURE SORPTION CHARACTERISTICS OF PINEAPPLE PROCESSING WASTE: SHELL AND CENTRAL CYLINDER

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

FLOW AROUND A SQUARE CYLINDER POSITIONED NEAR A SMOOTH FLAT PLATE

Vortex shedding phenomenon produced by a square cylinder placed close to a smooth flat plate is experimentally studied by means of flow visualization techniques and hot-film anemometry. Qualitative and quantitative information about the flow field has been obtained for Reynolds numbers up to 1,000. Vortex shedding images in several Reynolds number have been captured and the non dimensional vortex shedding frequency has been obtained as a function of the Reynolds number.

Thiamethoxam on the histological characteristics of sugarcane young roots

Thiamethoxam is a systemic insecticide from the neonicotinoid group, nitroguanidin family which affects the nicotinic receptor acetyl choline in the insect membrane, wounding the nervous system and causing the death of the insect. It was used with success in the control of initial pests of several crops. It was considered that thiamethoxam has a bioactivator effect, because in the absence of insects promoted increase in vigor, development and productivity of crops. This work was carried out to verify if thiamethoxam causes histological changes in sugarcane roots. In this work, it was used optical microscopy, images arrest, tissue biometrics and statistical analysis, in young roots of sugarcane RB 83 5486 after the treatments with different thiamethoxam concentrations. It was determined changes in histological structure of tissues 7, 14, 21 and 28 days after the treatments, establishing its effects on root plant anatomy. It was verified that thiamethoxam increased root cortex width, increasing the vascular cylinder and the metaxylem vessel elements number in the vascular tissue until 21 days after application.

Influência da área de amostragem na determinação de perdas totais na colheita de soja

A metodologia, atualmente utilizada, para a determinação das perdas na colheita de soja, que consiste na utilização de armações de 2 m², vem fornecendo resultados com alto coeficiente de variação, o que dificulta detectar diferenças significativas entre os tratamentos, mesmo que esta diferença apresente valores numéricos muito altos. em função deste problema, objetivou-se avaliar o efeito das armações sobre a quantificação das perdas totais na colheita da cultura da soja, alterando-se a velocidade de deslocamento da colhedora e a abertura entre o cilindro e o côncavo. O delineamento experimental foi em blocos casualizados, em esquema fatorial 2 x 3 x 2, totalizando 12 tratamentos com quatro repetições. Os resultados evidenciaram que o coeficiente de variação para a armação de 2 m² foi de 88,26%, enquanto que para a armação de 3 m² este valor foi de 32,85%, e que com a armação de 2 m² foram detectadas perdas totais de 45 kg ha-1, enquanto que com a de 3 m² quantificou-se 73 kg ha-1, indicando que a área das armações interfere na quantificação das perdas totais na cultura da soja.

Colheita mecanizada e perdas quantitativas de sementes de crotalária

In mechanized harvesting of seeds can occur losses, which reduce productivity, decrease the profitability and can do serious damage to the producer. The objective of this work was to evaluate the quantitative seed losses of Crotalaria juncea depending on the harvester speed and the rotation of the threshing cylinder. The experiment was conducted in the area of Education, Research and Production Unesp/Jaboticabal, using a entirely casualized design on factorial away 2x3, with two-speed displacement of the machine (1.8 and 3.2 km h(-1)) and three rotations of threshing cylinder (750, 800 and 850 rpm), with 4 repetitions. It was concluded that the measures relating to the development of the plants showed homogeneous behavior, indicating little dispersion of the data. It was observed that the rate of displacement of the harvester and rotation of the drum track not affected the losses in the plataform of cutting. The largest losses of crotalaria seeds occurred on the plataform of cutting the harvester machine, in the form of pods not harvested. It was observed that the total losses in the harvest of crotalaria seed were high, and the losses in pods on the soil, responsible for almost all the losses encountered.

Qualidade física e fisiológica de semente de soja colhida com sistema de trilha axial sob diferentes velocidades de operação e rotações do cilindro trilhador

A colheita mecanizada é ferramenta fundamental no processo produtivo das grandes culturas; se não for realizada adequadamente, poderá resultar em danos mecânicos severos às sementes, acarretando, prejuízos significativos na colheita, particularmente devido à redução da qualidade. Visando a avaliar os danos causados na colheita mecanizada de soja, o presente trabalho teve como objetivo estudar o efeito do sistema de trilha axial sobre a percentagem de bandinhas, impurezas e sementes quebradas de soja cv. M-Soy 8001, em função da velocidade de trabalho e rotação do cilindro trilhador. O delineamento experimental utilizado foi o inteiramente casualizado, em parcelas subdivididas, avaliando-se duas rotações do cilindro trilhador (400 e 500 rpm) e três velocidades de operação (3,5; 4,5 e 5,5 km h-1), com três repetições. Os resultados obtidos indicam que as combinações de velocidade de operação e rotações do cilindro de trilha avaliadas não afetam as variáveis vigor, impurezas, bandinha, emergência em areia e índice de velocidade de germinação e que o aumento da rotação de 400 para 500 rpm ocasiona o aumento de sementes quebradas.

STEM ANATOMY and DEVELOPMENT of SUCCESSIVE CAMBIA IN THE NEOTROPICAL LIANA SECURIDACA RIVINIFOLIA (POLYGALACEAE)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Microbiological assay for cefoxitin sodium in dosage form

A microbiological assay applying the cylinder-plate method is described for determination of the activity of cefoxitin sodium in injectables. Using a strain of Staphylococcus epidermidis ATCC 12226 as the test organism, cefoxitin sodium was measured in concentrations ranging from 50.0 to 200.0 mu g/mL. The validation showed that the method was linear (r = 0.9998), precise (RSD 0.81%), and accurate. It was concluded that the microbiological assay is satisfactory for quantitation of cefoxitin sodium in injectables.

Microbiological assay for gatifloxacin in pharmaceutical formulations

A simple, sensitive and specific agar diffusion bioassay for the antibacterial gatifloxacin was developed using a strain of Bacillus subtilis ATCC 9372 as the test organism. Gatifloxacin could be measured in tablets and raw material at concentration ranging 4-16 mu g ml(-1). The calibration graph for gatifloxacin was linear from 4.0 to 16.0 mu g ml(-1). A prospective validation of the method demonstrated that the method was linear (r(2) = 0.9993), precise (R.S.D. = 1.14%) and accurate. The results confirmed its precision and did not differ significantly from others methods described in the literature. The validated method yielded good results in terms of the range, linearity, precision, accuracy, specificity and recovery. We concluded that the microbiological assay is satisfactory for in vitro quantification of the antibacterial activity of gatifloxacin. (c) 2005 Elsevier B.V. All rights reserved.

Microbiological assay for lomefloxacin in coated tablets

The validation of a microbiological assay, applying cylinder plate method for determination of the activity of lomefloxacin in coated tablets is described. Using a strain of Bacillus subtilis ATCC 9372 as the test organism, lomefloxacin was measured in concentrations ranging from 2.0 to 8.0 mu g/mL. The method validation showed that it is linear (r = 0.9999), precise (relative standard deviation 1.15%), and accurate (it measured the added quantities). The excipients did not interfere in the determination. It was concluded that the microbiological assay is satisfactory for quantitation of lomefloxacin in tablets.