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| Goneli,André L. D.; Araujo,Willian D.; Hartmann Filho,Cesar P.; Martins,Elton A. S.; Oba,Guilherme C.. |
| ABSTRACT: The aim of this study was to adjust mathematical models to the experimental data on the peanut kernels drying in thin layer, as well as to determine the effective diffusion coefficient and the main thermodynamic properties involved in drying of the grains under different air conditions. The peanut kernels, with a water content of 0.59 ± 0.002 (dry basis, d.b.), were dried in a forced air ventilation oven with different temperature levels (40, 50, 60 and 70 °C) until reaching a water content of 0.04 ± 0.001 (d.b.). For the experimental data, eight mathematical models traditionally used to represent the drying kinetics of thin layer of agricultural products were adjusted, also being determined the effective diffusion coefficient and the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arachis hypogaea L.; Effective diffusivity; Activation energy; Page model; Thermodynamic properties. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000500994 |
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| Andrade,José C. de; Goneli,André L. D.; Hartmann Filho,Cesar P.; Goes,Rafael H. de T. E B. de; Gonçalves,Alexandre A.. |
| ABSTRACT: The gap in the storage industry has brought a series of problems for the agro industrial market today, as its ability to directly infer the quality of newly collected material. The present study was carried out with the objective of evaluating the quality of second crop corn harvested with different water contents depending on the period until drying. The corn grains were harvested with moisture contents of approximately 28.5; 22.4; 21 and 19%, and subjected to temporary storage for ten days, simulating the time between harvest and drying. In the period, every two days the quality was evaluated by determining the specific mass, electrical conductivity, color, crude protein content, ethereal extract, ashes and carbohydrates. Based on the obtained... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L.; Grain quality; Post-harvest. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000501004 |
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| Martins,Elton A. S.; Lage,Eduardo Z.; Goneli,André L. D.; Hartmann Filho,Cesar P.; Lopes,Jéssica G.. |
| Propôs-se, neste trabalho, avaliar a cinética de secagem de folhas de timbó (Serjania marginata Casar) e ajustar diferentes modelos matemáticos aos valores experimentais de razão de umidade. As folhas de timbó foram colhidas com teor de água inicial de 2,03 ± 0,10 decimal b.s., sendo submetidas à secagem sob condições controladas de temperatura (40, 50, 60 e 70 ºC), até o teor de água de 0,08 ± 0,02 decimal b.s. Aos dados experimentais foram ajustados dez modelos matemáticos utilizados para representação da secagem de produtos agrícolas. Com base nos resultados obtidos o modelo matemático de Midilli é o que melhor representa a cinética de secagem para as folhas de timbó. O aumento da temperatura promove: uma taxa maior de remoção de água nas folhas de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Modelo de Midilli; Coeficiente de difusão; Propriedades termodinâmicas; Razão de umidade. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015000300238 |
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| Andrade,José C. de; Goneli,André L. D.; Hartmann Filho,Cesar P.; Azambuja,Thalita M. S. de; Barboza,Valdenise C.. |
| ABSTRACT The objective of this study was to evaluate the quality of second-crop corn harvested with different moisture contents as a function of time before drying. The corn grains were harvested with moisture content of 28.5, 22.4, 21 and 19%, and submitted to a temporary storage for ten days, simulating the time between harvesting and drying. Quality was subsequently evaluated every two days, based on the commercial classification of the grains, sanity test and dry bulk density. The results showed that: the increase in moisture content at harvest affects the physical and sanitary quality of second-crop corn, and this effect is aggravated over time; the moisture content of 19% is the one that least affects grain quality during the ten days of temporary... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L.; Physical and sanitary quality of grains; Post-harvest. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017001100803 |
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| Martins,Elton A. S.; Goneli,André L. D.; Hartmann Filho,Cesar P.; Mauad,Munir; Siqueira,Valdiney C.; Gonçalves,Alexandre A.. |
| ABSTRACT Safflower is an oil crop and its oil can be used for food and industrial purposes. However, there is little information about the physical properties of these grains, which is important for the planning and execution of post-harvest stages. Thus, this study was carried out with the aim of evaluating the effect of drying on the main physical properties of safflower grains. Safflower grains were harvested with an initial moisture content of approximately 0.445 decimal d.b. (dry basis) and subjected to drying in an oven with forced air circulation at 40 °C, until the grains reached a final moisture content of 0.073 ± 0.008 decimal d.b. During the drying, bulk density and true density, porosity, thousand-grain mass, circularity, sphericity, projected... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carthamus tinctorius L.; Bulk density; Shape of grains. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000500344 |
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| Martins,Elton A. S.; Goneli,André L. D.; Goncalves,Alexandre A.; Hartmann Filho,Cesar P.; Siqueira,Valdiney C.; Oba,Guilherme C.. |
| ABSTRACT Blackberry leaves have some pharmacological properties and one of the most widespread and studied uses is to relieve symptoms of the climacteric and other symptoms during the premenstrual period. Thus, drying becomes important for the conservation and storage of the product until its use or processing. The present study aimed to evaluate the drying kinetics of blackberry leaves, as well as to determine the effective diffusion coefficient and the activation energy during the drying process. Blackberry leaves were dried in an experimental fixed-bed dryer under four controlled temperature conditions (40, 50, 60 and 70 °C) and two drying air speeds (0.4 and 0.8 m s-1). With the experimental data of moisture ratio, eight mathematical models were fitted... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Morus nigra L.; Medicinal plant; Air speeds; Midilli model. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000800570 |
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