Quality aspects of heated-air drying of soybeans

Ghaly, T.F.; Sutherland, J.W.

doi:10.1016/0022-474x(83)90022-x

Cited by 14 publications

(5 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Já para óleos obtidos de outras fontes a variação de tempo e temperatura não afetou a % de AGL (GUARTE; MUHLBAUER; KELLERT ,1996;SUTHERLAND, 1983;1984).…”

Section: Resultsunclassified

Influência da secagem do pequi (Caryocar brasiliense Camb.) na qualidade do óleo extraído

Aquino¹,

Ferrua²,

Borges³

et al. 2009

Ciênc. Tecnol. Aliment.

View full text Add to dashboard Cite

IntroduçãoO pequi é um fruto sazonal com safra entre os meses de novembro e fevereiro, dependendo da região (LORENZI, 2000). Por ser fonte de renda da população do cerrado, pesquisadores têm desenvolvido projetos voltados para o processamento da polpa de pequi e a fabricação de conservas, além do congelamento tradicional da polpa (LIMA, 2006), com o objetivo de diminuir a deterioração e a descaracterização do sabor da polpa.O pequi é rico em carotenoides (AZEVEDO-MELEIRO; RODRIGUEZ-AMAYA, 2004; LIMA, 2006;OLIVEIRA et al., 2006;HELOU, 1993), que possuem importantes funções biológicas no ser humano, atuando na prevenção de alguns tipos de câncer, na inibição das mucosas contra úlceras gástricas, na capacidade de prevenir a fotossensibilização em certas doenças de pele, no aumento da resposta imunológica a determinados tipos de infecção e nas propriedades antienvelhecimento (COLDITZ et al., 1985;RODRIGUEZ-AMAYA, 1985;OLSON, 1989). Além disso, alguns carotenoides apresentam atividade como vitamina A (RAMOS, 1991; RODRIGUEZ-AMAYA, 1993a) e protetores de óleos e gorduras, por serem considerados sequestradores de oxigênio, oxidando-se preferencialmente (RODRIGUEZ-AMAYA, 1993b).Cuidados especiais com relação aos métodos de processamento e armazenamento de alimentos devem ser levados em conta devido à grande instabilidade dos carotenoides. Por causa de seu alto grau de insaturação, são susceptíveis à isomerização e oxidação (O' BRIEN, 2004;RAMOS, 1991;RODRIGUEZ-AMAYA, 1993b). A exposição dos carotenoides ao calor, ao oxigênio, à luz, acidez elevada e à baixa atividade de água são fatores que podem levar a mudanças estruturais, reduzindo assim sua atividade (RODRIGUEZ-AMAYA, 1993b). AbstractPequi (Caryocar brasiliense Camb) has stood out for being an oleaginous fruit rich in carotenoids. Drying is widely used technique in the oil extraction process using hexane, but the degradation of oil and carotenoids may occur. The objective of this study was to evaluate the influence of different drying methods (sun, air-circulated drier at 40 and 60 °C) and time (4 hours and up to constant weight) on the yield and quality of the oil extracted using hexane using a soxhlet apparatus. When the pequi pulp was dried up to 3% or even lower, more oil yield was obtained (52-59%, dry basis). The total carotenoids contents obtained were higher and the peroxide index was lower for the pulp dried at 40 °C in an air-circulated drier when compared to drying at 60 °C in an air-ventilated drier and to sun drying technique. These results indicate that drying in an air-circulated drier at 40 °C for 19 hours resulted in higher oil yields with less heat degradation.

show abstract

“…Já para óleos obtidos de outras fontes a variação de tempo e temperatura não afetou a % de AGL (GUARTE; MUHLBAUER; KELLERT ,1996;SUTHERLAND, 1983;1984).…”

Section: Resultsunclassified

Influência da secagem do pequi (Caryocar brasiliense Camb.) na qualidade do óleo extraído

Aquino¹,

Ferrua²,

Borges³

et al. 2009

Ciênc. Tecnol. Aliment.

View full text Add to dashboard Cite

show abstract

“…10 The drying temperature for drying of sunflower seeds should not be more than 70 C, and low initial moisture content of sunflower seeds around 16% are safer for not affecting the output quality. [11][12][13][14][15] For a given drying temperature, germination and free fatty acid of the sunflower seeds are increased with decreasing initial moisture.…”

Section: Introductionmentioning

confidence: 98%

Evaluation of thermal efficiency of oscillating-bed solar dryer through drying of sunflower seeds

Shanmugam

Kumar

Veerappan

2011

Journal of Renewable and Sustainable Energy

View full text Add to dashboard Cite

Quite a number of solar dryers have been reported for drying of different agricultural produce and products. Few dryers have their bed oscillated. A solar dryer, the bed of which is oscillated at different frequencies is presented in this paper. This paper also explains the drying methodology, variation in relative humidity, and removal of moisture content from sunflower seeds. It is possible to dry 31.36 kg of sunflower seeds to the average moisture level of 7.9% which is in the acceptable level of moisture content of less than 10% in just 8 h. The average thermal efficiency of the solar dryer is 30.

show abstract

“…The protein-packed cotyledons have high affinity for moisture uptake and will expand and contract dramatically, putting pressure on the seed coat, which stretches and weakens. [13,18] When the cotyledons dry and shrink, the seed coat also shrinks, becoming more prone to damage. [19] Unfortunately, in fixed beds, and other dryers the heterogeneity of the air and grain temperature and moisture content during the process makes it hard to optimize the process.…”

Section: Introductionmentioning

confidence: 99%

Soybean (Glycine maxL. Merrill) Seed Drying in Fixed Bed: Process Heterogeneity and Seed Quality

2015

View full text Add to dashboard Cite

Soybean (Glycine max (L.) Merr.) is the most important oilseed in the world market.Seed quality has direct influences on the success of the crop and contributes significantly to productivity levels. The quality of soybean seeds can be influenced by several factors during drying. This study evaluated the drying of soybean seeds in a fixed bed dryer, considering the heterogeneity of the process and the effect of process variables on seed quality. Seed and air temperatures, seed moisture and seed quality were measured through the bed. Empirical equations were obtained relating seed quality indicators, at several bed axial positions, as a function of process variables.

show abstract

Quality aspects of heated-air drying of soybeans

Cited by 14 publications

References 6 publications

Influência da secagem do pequi (Caryocar brasiliense Camb.) na qualidade do óleo extraído

Influência da secagem do pequi (Caryocar brasiliense Camb.) na qualidade do óleo extraído

Evaluation of thermal efficiency of oscillating-bed solar dryer through drying of sunflower seeds

Soybean (Glycine maxL. Merrill) Seed Drying in Fixed Bed: Process Heterogeneity and Seed Quality

Contact Info

Product

Resources

About