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gebran nassif

    gebran nassif

    ... Isolation of Vacuum Steam Volatile Oil. Two principal methods were used. (1) The tomatoes (4.5 kg) were cut into quarters, mixed with 3 1. of distilled water, and treated in a vacuum steam distillation continuous extraction apparatus... more
    ... Isolation of Vacuum Steam Volatile Oil. Two principal methods were used. (1) The tomatoes (4.5 kg) were cut into quarters, mixed with 3 1. of distilled water, and treated in a vacuum steam distillation continuous extraction apparatus (Nickerson and Likens, 1966; Buttery et a ...
    ... possibly minimum boiling point. It permits in most cases a direct quantitative determination of the volatile oil of most plant products without preliminary extraction with ether or other solvents. APPARATUS. The apparatus (Figs. ...
    Because Mexico is the number one producer of avocados in the world, this fruit has potential as a source for oil extraction. It is appropriate to further investigate the detailed changes that the oil undergoes when different extraction... more
    Because Mexico is the number one producer of avocados in the world, this fruit has potential as a source for oil extraction. It is appropriate to further investigate the detailed changes that the oil undergoes when different extraction methods are applied. This research paper presents the study of the physical and chemical changes, the fatty acids profile, the trans fatty acid content, and the identification of volatile compounds of the oils from avocado pulp (Persea americana Mill.), obtained by four different extraction methods. The method with the greatest extraction yield was the combined microwave-hexane method. The amount of trans fatty acids produced in the microwave-squeezing treatment was <0.5 g/100 g. On the other hand, the amounts of trans fatty acids produced with the hexane and acetone treatments were 0.52 and 0.87 g/100 g, respectively. The method that caused the slightest modification to the oil quality was a novel combined extraction method of microwave-squeezing proposed by the authors.