A5041090912- Agricultural and Food Sciences
- Food Drying and Modeling
- Phytochemistry Medicinal Plant Applications
- Essential Oils and Antimicrobial Activity
- Microencapsulation and Drying Processes
- Enzyme Production and Characterization
- Bee Products Chemical Analysis
- Insect Pest Control Strategies
- Biofuel production and bioconversion
- Environmental Sustainability and Education
- Growth and nutrition in plants
- Business and Management Studies
- Postharvest Quality and Shelf Life Management
- Spectroscopy and Chemometric Analyses
- Healthcare Regulation
- Sensory Analysis and Statistical Methods
- Microbial Inactivation Methods
- Thermochemical Biomass Conversion Processes
- Seed and Plant Biochemistry
- Healthcare during COVID-19 Pandemic
- Freezing and Crystallization Processes
- Medicinal Plants and Neuroprotection
- Agriculture, Plant Science, Crop Management
- Agricultural Engineering and Mechanization
- Chemistry and Chemical Engineering
Universidade Federal Fluminense
2014-2024
Universidade Federal do Rio de Janeiro
2016-2019
Universidade Federal de Viçosa
2008
Centro Universitário de Volta Redonda
2007
The concentration and the chemical composition of essential oils obtained from different samples Cymbopogon citratus were evaluated. Among 12 investigated (11 dried leaf fresh plant leaves), seven presented oil concentrations within threshold established by Brazilian legislation. moisture content was also determined majority humidity contents near 12%. GC GC/MS analyses led to identification 22 compounds, with neral geranial as two major components. total percentage these compounds varied...
As características da secagem de folhas Cymbopogon citratus (D.C.) Stapf em camada delgada, foram estudadas para a faixa temperatura 30-60 ºC, utilizando-se modelos semi-teóricos e empíricos. O modelo Midilli foi o que melhor descreveu as curvas secagem. Os valores difusividade efetiva variaram 4 x 10-12a 3,9 10-11 m-2 s-1 avaliada. obtidos mostraram uma dependência Arrhenius. valor energia ativação encontrado 63,47 kJ mol- 1.
O objetivo do presente trabalho foi a obtenção e avaliação das curvas de secagem feijão (Phaseolus vulgaris L.) ajustar diferentes modelos matemáticos aos valores experimentais teor água para diversas condições ar. Foram utilizados grãos colhidos com 0,92 (b.s.) submetidos à até o 0,14 sob controladas temperatura (35; 45 55 °C) umidade relativa ar 40 ± 2%. Aos dados experimentais, foram ajustados 12 citados na literatura específica representação processo produtos agrícolas. Pelos resultados...
A espécie Cymbopogon citratus, conhecida como capim-limão, é amplamente utilizada popularmente para fins medicinais e tem o uso nas indústrias farmacêuticas, alimentícias, de cosméticos perfumaria. Devido à necessidade conhecimentos específicos na área pré-processamento, presente trabalho a finalidade equacionar analisar alguns aspectos da secagem, que permitam prever as alterações qualidade do produto. Folhas referida foram submetidas cortes em diferentes comprimentos secagem temperaturas....
The drying target is to reduce the moisture content and thereby increase life time of products by limiting enzymatic oxidative degradation. In addition, reducing amount water, percentages active principles are increased in relation total mass. aim current study was determine correct diffusion rate activation energy adapting mathematical model according experimental data. Brazilian lemon-scented verbena leaves were harvested with a around 85% wet basis (wb), then subjected medicinal plant...
The search for alternatives the control of microbiological contamination in foods has been object study different scientific areas. This aimed to evaluate efficiency lemon grass (Cymbopogon citratus) essential oil controlling growth fungus Aspergillus flavus three types analysis: first, by vitro tests, doses between 0.2 and 1.0 μL/ml; second, serial microdilution determine minimum inhibitory concentration, 0.1 1.2 μL/mL; third, inhibition fungal corn kernels contaminated using 0.4, 0.7,...
The effects of storage in different packages on the essential oil content and humidity Brazilian lemon grass (Cymbopogon citratus) leaves were studied. Lemon dried at 50C to moisture 11% (d.b.) stored for one year three plastic paper packages. Oil its principal compounds isolated by hydro-distillation method analyzed GC-FID as well GC-MS every two months. results showed a reduction decrease citral myrcene plant all during storage. Water concentration did not significantly vary period
<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,...
Os fungos estão entre os principais responsáveis por danos e perdas em diversos alimentos. Possuem a capacidade de produzir metabólitos secundários quando submetidos condições ideais, conhecidos como micotoxinas, substâncias altamente tóxicas que podem contaminar produtos destinados à alimentação tanto humana animal causando para saúde. O controle destes tem sido feito meio sintéticas, são prejudiciais ao homem ambiente. Desta forma faz-se necessária busca métodos alternativos do desses...
ABSTRACT One of the main urban polluting agents are sewers, which even with proper treatment end up generating a waste, sewage sludge. options for disposal this sludge is use in agriculture, due to its high content organic matter and nutrients. This study aimed lemongrass cultivation essential oil production. The plants were grown soil containing different compost doses (0, 5, 10, 20, 40 60 t ha-1), formed from composting process waste vegetation pruning. At harvest, analyzed concentration...
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...
The objective of this work was to evaluate the antifungal activity essential oil Cymbopogon citratus in control Aspergillus brasiliensis analysis vitro and stored corn kernels. Two tests were carried out. One them, by diffusion agar other microdilution wells. concentrations used for assay 0.2; 0.4; 0.6; 0.8 1.0 µL mL-1. test were: 0.1; 0.3; 0.5; 0.7; 0.8; 0.9; 1.2 mycelial growth evaluated over time, using Scott-Knott at 5% significance. From results obtained, it verified that application...
O presente trabalho foi realizado com o objetivo de selecionar, dentre cinco modelos matemáticos, aquele que melhor descreve as curvas experimentais secagem da parte aérea P. brevipedunculata. Os testes foram realizados em protótipo secador leito fixo, camada delgada, a 30, 40 e 50°C, fluxo mássico ar seco 0,27 0,54 kg s-1 m-2. grau ajuste dos avaliado por meio do coeficiente determinação, raiz erro quadrático médio, percentual absoluto chi-quadrado reduzido, pela análise dispersão resíduos,...
Este trabalho teve como objetivo, fazer o levantamento das plantas medicinais mais utilizada na medicina popular pela populacao do municipio de Cascavel/PR. A metodologia consistiu aplicacao questionarios onde foram registrados nomes populares, habitos uso, parte utilizada, modo preparacao e outros dados. Foram coletados 470 questionarios, as dez utilizadas Coleus barbatus Benth, Achyrocline satureioides, Matricaria chamomilla L., Baccharis trimera Lers, Menta piperita Mikania glomerata...
ABSTRACT Green onion (Allium fistulosum L.) is widely consumed and traded in Brazil as condiment. Because of the high yields region Volta Redonda - RJ alternative drying a method for preserving excess production, objective this study was to evaluate process green onions, considering microbiological quality, develop mathematical modeling process. Mathematical models describe agricultural products were used predict phenomenon. The modified Page equation gave best fit data. Microbiological...
The use of hazardous chemicals has become a common practice to control diseases that affect agricultural production. In this scenario, society is challenged increase food availability while reducing pesticide use, which causes damage health and the environment. sense, essential oils appear as promising alternative reduce pesticides, since they are plant-derived compounds. This study aimed identify main chemical components evaluate in vitro antimicrobial potential Brazilian species Elionurus...
This study aimed to assess the drying kinetics of red and yellow chili peppers, "dedo-de-moça" variety, at different temperatures (35, 45, 55, 70 °C) model this phenomenon mathematically. We also evaluated effect these air on pepper fruit color. Pepper fruits were dried in a forced-air circulation dryer. Ten mathematical models fitted experimental data by nonlinear regression analysis. After drying, samples analyzed for following colorimetric parameters: lightness (L*), chroma or saturation...
Lemon-scented grass (Pectis brevipedunculata) is an essential oil-bearing plant, which considered a potential source of citral for the food and fine chemical industries. Knowledge its drying kinetics can assist in design convective driers that are capable preserving quality product. In this study, were investigated using three levels air temperature (30C, 40C, 50C) two dry mass flow rate (0.274 0.542 kg s-1 m-2) mean humidity ratio 0.019 kg-1. The suitability Lewis model to accurately...
Avaliar a qualidade da farinha obtida de grãos trigo fumigados com atmosfera sintética (21% CO2) associada níveis reduzidos fosfina (0,25, 0,50 e 0,75 g m-3) foi o que se objetivou através deste trabalho. Para posterior comparação dos resultados, realizaram-se dois tratamentos ar ambiente associado às dosagens zero 1,0 m-3 PH3, em três períodos exposição (24, 72 120 h) temperatura 29 ºC 60% umidade relativa. A análise resultados permitiu concluir-se que, geral, os não influenciaram na para...