A5090761002- Food Drying and Modeling
- Agricultural and Food Sciences
- Coffee research and impacts
- Microencapsulation and Drying Processes
- Agricultural Engineering and Mechanization
- Postharvest Quality and Shelf Life Management
- Soil Management and Crop Yield
- Growth and nutrition in plants
- Soil Mechanics and Vehicle Dynamics
- Microbial Inactivation Methods
- Effects of Environmental Stressors on Livestock
- Freezing and Crystallization Processes
- Biodiesel Production and Applications
- Magnetic and Electromagnetic Effects
- Seed Germination and Physiology
- Textile materials and evaluations
- Animal Behavior and Welfare Studies
- Agriculture Sustainability and Environmental Impact
- Food Chemistry and Fat Analysis
- Induction Heating and Inverter Technology
- Meat and Animal Product Quality
- Edible Oils Quality and Analysis
- Lipid metabolism and biosynthesis
- Moringa oleifera research and applications
- Tree Root and Stability Studies
Universidade Federal de Lavras
2016-2025
Universidade Federal Fluminense
2004-2014
Abstract The objective of this study was to chemically and sensorially evaluate dryprocessed coffees with an initial quality 82 84 points on the SCA (Specialty Coffee Association) scale, packaged in impermeable permeable materials, stored at room temperature a refrigerated environment for 9 months. sensory chemical beans evaluated beginning storage, as well after six nine results show that specialty natural higher score experience attenuation sweetness, acidity, body, aftertaste over months...
<abstract><title><italic>Abstract.</italic></title> <bold> </bold>The effects of three dry bulb temperatures (35°C, 40°C, and 45°C) dew point (2.6°C, 10.8°C, 16.2°C) the drying air on kinetics sensory quality natural coffee were evaluated. It was observed that beverage depends characteristics air, especially interaction between temperature values point. When at a 35°C, decreased as decreased, which represents an increase in rate. However, when 45°C, reduced both 2.6°C 16.2°C temperature....
Brazil is the world’s largest sugarcane producer, with 45.71 million tons of sugar and 29.7 billion liters ethanol in 2023. To meet growing demand while addressing environmental concerns, mechanical harvesting demands new research area. This work took into account anisotropy heterogeneity stems. Base cutting was simulated using finite element method. For this, properties were obtained by common grade RB966928. The simulation based on a rotational speed 640 rpm angle 18° blade. results...
Diante da importância secagem na fase pos-colheita do cafe e seu reflexo qualidade final produto, objetivou-se, neste trabalho, avaliar a cinetica em diferentes temperaturas ar de secagem, para uma baixa temperatura ponto orvalho frutos arabica (Coffea L.), processados via seca. Os foram colhidos manualmente submetidos separacao hidraulica. Para dos frutos, com teor agua inicial 1,9 ± 0,1 kg.kg-1 (bs), utilizou-se secador mecânico tres bulbo seco (35 °C, 40 °C 45 °C) mesma temperatura...
<title>RESUMO</title><p>A secagem é um processo utilizado para retirar certa quantidade de água do produto com a finalidade aumentar vida prateleira, minimizar as perdas na pós-colheita, excesso da produção e devido contração volumétrica reduzir os custos embalagem, transportes armazenamento. Diante exposto objetivou-se no trabalho fazer o estudo cinética secagem, análise obter valores difusão líquida durante figo. Foram utilizados figos comércio cidade Niterói, RJ,...
Respiratory abnormalities among workers at coffee roasting and packaging facilities have already been reported; however, little is known about microbiological contamination inside production facilities. This study intends to assess the microbial (fungi bacteria) in two industries from Brazil with a multi-approach protocol for sampling subsequent analyses using four main sources of samples: filtering respiratory protection devices (FRPD) used by workers, settled dust, electrostatic dust...
Drying kinetics, along with mathematical modeling, provides means for simulations and predictions to achieve process optimizations. This study investigated the drying kinetics of Criollo Forastero cocoa beans, varieties cultivated in Amazon region, at three different temperatures (50 °C, 60 70 °C). The results showed that two exhibited distinct behaviors during process. temperature °C was most effective, as it provided seed water content closer 8% (8.15% d.b.) (8.89% varieties. Mathematical...
RESUMO Este trabalho foi realizado com o intuito de se avaliar danos mecânicos em sementes feijão ( Phaseolus vulgaris L.) variedade Ouro Negro 1992, por meio condutividade elétrica da solução contendo as danificadas devido ao choque mecânico controlado, utilização três níveis velocidade choque. Para comparar a queda qualidade mecânico, foram utilizados também teste-padrão germinação e avaliação visual dos mecânicos, cujos resultados permitiram concluir que pode ser correlacionada índice...
A secagem é, dentre as práticas de pós-colheita, uma das mais importantes, pois tem como finalidade: diminuir o teor água do produto, permitir a armazenagem por períodos longos sem perigo deterioração produto; antecipar colheita; manter poder germinativo períodos; impedir crescimento microorganismos e insetos; minimizar perda produto no campo; reduzir volume peso ser transportado. Este trabalho teve objetivos determinação curvas sementes feijão em camada fina partir diferentes teores inicial...
<p>The aim of this study was to determine the main thermal properties granular mass coffee (specific heat, conductivity, and diffusivity) for different degrees roasting, as well model simulate conductivity at roasting. For determination specific mixing method used, theoretically infinite cylinder with a central heating source. Thermal diffusivity simulated algebraically using results cited above apparent product. also optimized through finite element analysis software. At darker there...
O álcool da cana-de-açúcar, produzido pelo Brasil tem se mostrado grande potencial de contribuição para amenizar a crise energética em que mergulhamos e é efeito direto poluição causada pelos combustíveis fósseis, viraram os grandes vilões sobrevivência humanidade. Bem como crescente demanda por fontes renováveis. Programa Nacional do Álcool (Proálcool) não foi primeira experiência brasileira produzir ser utilizado veículos, porém, estabilização preço barril petróleo problemas enfrentados...
Due to the structural constraints of wheelchairs for users with motor disabilities, it is essential understand and ensure their proper functioning quality life these users. The main objective this study analyze stresses displacements in a wheelchair using finite element method evaluate its functional aspects though simulations. Influenced by normative techniques that consider ergonomic, anthropometric biomechanical, factors were considered verify compliance equipment considering current...
The success of confinement for dairy cattle in the compost barn model depends mainly on management bed and consists its turning. This paper characterises spatial variability temperature model, as well verifying whether there was an effect efficiency from turning with different agricultural implements. experiment conducted during summer winter 2016, 8 days collection each period. Data were analysed descriptive statistics methods geostatistical modelling semivariograms kriging maps. results...
ABSTRACT Parsley is a species of wide production and trade in Brazil due to its high consumption as condiment, fresh or dried. In the development equipment used for drying, it important simulate obtain theoretical information about behavior water loss each product. Given increasing use potential commercialization condimental plants, objective this work was determine isosteric heat parsley leaves fit mathematical models experimental data obtained drying desorption processes. The modified GAB...
To maintain seed and soil quality of pumpkin, energy knowledge associated with processing storage stages is strategic for the optimization thermodynamic processes needed product stabilization. Thus, objective this study was to determine isosteric heat, differential entropy, Gibbs free within a temperature range from 20 70° C, relative air humidity levels between 10.75 85.11%. The based on empirical data water activity determination. As result, we verified that as moisture content decreased,...
ABSTRACT The use of organic wastes from housing systems in a compost bedded pack barn model could supply much the fertiliser demand farm. Moreover, with increase food consumption sustainable livestock, generated farm itself becomes economically viable. This study aimed to evaluate effect manure cattle confinement applied at different moments on maize crop. experiment was carried out randomized blocks five treatments and repetitions. data were submitted analysis variance means compared by...
This study aimed to evaluate drying kinetics for natural and pulped coffee, using different temperatures airflows. For the conduction of experiment, coffee fruits (Coffea arabica L. cv. Topázio) were harvested manually, selecting only ripe subsequent hydraulic separation. use a mechanical dryer with two (40 45°C) four air streams (24; 60; 96 132 m3.min-1.m-2). Twelve models employees describe coffees. Among used process according results coefficient determination, relative mean error,...
O presente trabalho teve como objetivo o estudo da cinética de secagem, análise contração volumétrica, bem como, obter os valores difusão líquida durante processo secagem dos frutos do morango. Os morango foram submetidos à nas temperaturas ar 40, 55 e 70 °C. Ao longo foi estudado comportamento fruto, a variação volume perda água, desde início até chegaram um teor água de, aproximadamente, 0,25 b.s. Aos dados experimentais aplicados modelos matemáticos capazes descrever redução volume....
Com o intuito de analisar a dinâmica sorção e energia necessária para processamento do abacaxi (Ananas comosus), presente trabalho teve como objetivo determinação equilíbrio higroscópico calor isostérico da casca polpa abacaxi, partir diferentes condições controladas temperatura umidade relativa ar, assim avaliar, dentre diversos modelos descritos na literatura, que melhor representa comportamento latente vaporização água nos produtos analisados. Como resultado, foi verificado modelo se...
ABSTRACT This study focuses on the determination of hygroscopic equilibrium and isosteric heat aji chili pepper (Capsicum baccatum) under different controlled temperature relative air humidity conditions. In addition, objective was to adjust model among existing literature models that best represent isothermal sorption behavior, as well propose a new this phenomenon. Having obtained mathematical experimental data, parameters hygroscopicity satisfactorily determined. The temperatures used...
ABSTRACT Coffee harvesters are subject to stresses and vibrations in their structure, originating from engines harvesting system. These structures must be designed avoid rupturing of the components due fragility materials, inadequate geometries, or phenomenon resonance, which increases displacements/deformations components. In this scenario, main objective study is analyse results displacements two static simulations present natural vibration frequencies modal a self-propelled coffee...
This work aimed to study the immediate and latent effects of different relative humidities on quality dried coffee fruits, describe drying kinetics natural immature (Coffea arabica L.), evaluate mathematical model that best fits experimental data.The was carried out in a fixed layer dryer coupled composite air conditioning system which controlled with an flow 20 m 3 .min 1 .m - , at temperature 40 °C, 10%, 17.5% 32.5%.Manually harvested fruits were used mean water content 0.120 dry basis...