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1.
Molecules ; 22(2)2017 Feb 02.
Artigo em Inglês | MEDLINE | ID: mdl-28157172

RESUMO

In this study, the subcritical butane extraction process of fenugreek seed oil was optimized using response surface methodology with a Box-Behnken design. The optimum conditions for extracted oil from fenugreek seed was as follows: extraction temperature of 43.24 °C , extraction time of 32.80 min, and particle size of 0.26 mm. No significant differences were found between the experimental and predicted values. The physical and chemical properties of the oil showed that the oil could be used as edible oil. Fatty acid composition of oils obtained by subcritical butane under the optimum conditions and by accelerated solvent extraction showed negligible difference. The oils were rich in linoleic acid (42.71%-42.80%), linolenic acid (26.03%-26.15%), and oleic acid (14.24%-14.40%). The results revealed that the proposed method was feasible, and this essay shows the way to exploit fenugreek seeds by subcritical butane extraction under the scope of edible oils.


Assuntos
Butanos/química , Extração Líquido-Líquido , Extratos Vegetais/química , Óleos de Plantas/química , Sementes/química , Trigonella/química , Varredura Diferencial de Calorimetria , Ácidos Graxos/química , Extração Líquido-Líquido/métodos , Compostos Fitoquímicos/química , Termogravimetria
2.
J Sci Food Agric ; 97(6): 1894-1903, 2017 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-27528006

RESUMO

BACKGROUND: Red pepper seeds account for 450-500 g kg-1 of the total pepper weight and are often discarded as waste. In this study, process optimization and characterization of fragrant oil from roasted red pepper seed extracted by subcritical butane extraction were carried out. RESULTS: The optimal conditions of extraction were a temperature of 74.61 °C, a time of 68.65 min and a liquid/solid ratio of 30.24:1. The oil had a refractive index (25 °C) of 1.471, a relative density of 0.900, an acid value of 1.421 mg g-1 oil, an iodine value of 127.035 g per 100 g, a saponification value of 184.060 mg KOH g-1 , an unsaponifiable matter content of 12.400 g kg-1 , a peroxide value of 2.465 meq. O2 kg-1 and a viscosity of 52.094 cP. The main fatty acids in the oil were linoleic acid (72.95%) followed by palmitic acid (11.43%) and oleic acid (10.00%). The oil showed desirable thermal and oxidative stability. A total of 19 volatile compounds, mostly aldehydes and alkenes, were identified from the oil. CONCLUSION: The results indicated that the method is appropriate for the preparation of fragrant red pepper seed oil, and the oil is suitable for used as edible oil. © 2016 Society of Chemical Industry.


Assuntos
Capsicum/química , Fracionamento Químico/métodos , Óleos de Plantas/química , Óleos de Plantas/isolamento & purificação , Sementes/química , Butanos/química , Fracionamento Químico/instrumentação , Oxirredução
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