Vortex
Mostrando 1-12 de 281 artigos, teses e dissertações.
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1. Short-term effects of Whole-Body Vibration on clinical, cardiac, and ambulatory electrocardiographic (Holter) parameters of healthy younger and older adult male non-athletic crossbreed dogs
RESUMO O estudo teve como objetivo avaliar os efeitos agudos da vibração de corpo inteiro (VCI) nos parâmetros clínicos, cardíacos e eletrocardiográficos ambulatoriais (Holter) de cães jovens e adultos hígidos sem raça definida e não atletas. Quatorze cães foram divididos em dois grupos de sete cães, de acordo com a idade: Grupo I (GI) - entre 12
Arquivo Brasileiro de Medicina Veterinária e Zootecnia. Publicado em: 2022
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2. Preparation of a New Polymeric Deep Eutectic Solvent and Its Application in Vortex-Assisted Liquid-Liquid Microextraction of Parabens in Foods, Cosmetics and Pharmaceutical Products
A vortex-assisted liquid-liquid microextraction method combined with high performance liquid chromatography-diode array detector has been developed for the determination of parabens in foods, cosmetics and pharmaceutical products. In this work, polymeric deep eutectic solvents composed of DL-menthol and polyethylene glycol with three different light grades w
J. Braz. Chem. Soc.. Publicado em: 2020-10
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3. DETERMINATION OF THE PESTICIDES IN WATER USED IN THE CULTURE AND PROCESSING OF POTATOES
The contamination of water bodies by pesticide residues through direct flow, leaching and other methods has motivated the development of analytical methods for the determination of these compounds in water. A vortex-assisted liquid-liquid microextraction method followed by gas chromatography coupled to mass spectrometry for the determination of anilazine, li
Quím. Nova. Publicado em: 2020-09
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4. Aerodynamic effects on a high slenderness concrete chimney
Resumo Este trabalho apresenta os resultados da determinação teórico-experimental do comportamento aerodinâmico de uma chaminé esbelta de concreto armado, com 150m de altura e esbeltez 30. Foram construídos dois modelos reduzidos: um rígido para medição das pressões e outro aeroelástico, reproduzindo as principais características dinâmicas da es
Rev. IBRACON Estrut. Mater.. Publicado em: 13/12/2019
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5. Doxycycline release and antibacterial activity from PMMA/PEO electrospun fiber mats
Abstract Objective: To investigate the use of polymethyl methacrylate (PMMA) electrospun fiber mats containing different amounts of polyethylene oxide (PEO) as a doxycycline delivery system and to test antibacterial activity against an oral pathogen. Methodology: PMMA powders or PEO (mol wt 200 Kd) (10,20,30% w/w/) were dissolved in N, N-dimethylformamide
J. Appl. Oral Sci.. Publicado em: 07/10/2019
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6. CHEMICAL CONTROL OF ASIAN SOYBEAN RUST AS A FUNCTION OF CULTIVAR, ROW SPACING AND SPRAY BAR SUPPORT SYSTEMS
ABSTRACT Product deposition and foliar surface cover are highly impacting factors on the efficiency of foliar fungicides applied to soybean cultivars, due to their low mobility, with side effects on Asian soybean rust (ASR) control. Spray bar support systems, such as the air curtain (Vortex®) and the use of nozzles along the bar (Dropleg®), stand out as an
Eng. Agríc.. Publicado em: 12/08/2019
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7. Wave length and celerity downstream from a hydraulic jump
RESUMO Uma característica importante para a caracterização de uma onda é o seu período, ou seja, o intervalo de tempo correspondente a uma oscilação completa. Através do período da onda é possível estimar outras importantes características da onda, tais como o comprimento e a celeridade de uma onda. Neste estudo, são apresentados resultados de u
RBRH. Publicado em: 04/07/2019
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8. Generation of Non-diffraction Vortex Beam and Its Application in Digital Communication
Abstract An axicon-frustum basin-type Bessel resonator is designed for generating non-diffraction vortex beams with opposite propagation directions under different conditions. Based on the theory of geometric optics, the principle of creating vortex beams is analyzed in this axicon-frustum basin-shaped resonant cavity. It is shown that a non-diffraction vort
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 19/06/2019
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9. Escoamento de Calor Representado pela Equação de Laplace e a Transformada de Fourier em Seno e Cosseno
RESUMO Nesse artigo a equação de Laplace foi utilizada para representar uma distribuição de temperaturas estacionárias no primeiro quadrante no plano cartesiano com diferentes condições de fronteira, tendo sido examinada com detalhes, a luz da transformada de Fourier em seno e cosseno. Após obter a solução formal para cada exemplo, foi possível, u
TEMA (São Carlos). Publicado em: 10/06/2019
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10. Simultaneous Determination of 2,3,7,8-TCDD and 2,3,7,8-TCDF in Water Samples by LLE-LTP and HPLC-DAD
Polychlorinated dibenzo-p-dioxins and dibenzofurans are persistent organic pollutants which can mainly be found in the environment in water. These compounds are highly toxic and therefore developing new extraction methodologies that are simpler and cost less is highly desirable. This study aimed to optimize and validate the liquid-liquid extraction with low-
J. Braz. Chem. Soc.. Publicado em: 23/05/2019
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11. DEPOSITION AND COVERAGE OF SOYBEAN LEAF SURFACES BY SPRAYS APPLIED USING DIFFERENT ASSISTED BOOM SPRAYER SYSTEMS
ABSTRACT Maintaining homogeneity in the distribution of fungicidal sprays applied throughout the plant, minimizing the variation between the upper and lower third of the plant, is one of the main challenges for application technologies with regard to soybean crops. To increase the deposition and leaf coverage of sprayed compounds, especially in the middle an
Eng. Agríc.. Publicado em: 25/04/2019
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12. Simulación matemática para la optimización del patrón de flujo entregado por una buza para el molde de colada continua de planchón delgado
ABSTRACT Understanding the behavior of the oscillations of the jets into the mold of thin slab funnel is essential to ensure a constant supply of liquid steel, improve control of the flow patterns and consequently increase plant productivity and the final product quality. To achieve this, we conducted a study of the effect of the internal design of the nozzl
Matéria (Rio J.). Publicado em: 19/07/2018