Effect of drying with ultrasonic pretreatment on the yield and quality of the essential oil of Varronia curassavica Jacq. and Ocimum gratissimum Linn

•Ultrasonic pretreatment reduced drying time of V. curassavica and O. gratissimum.•Pretreatment maximized the essential oil yield of V. curassavica.•Essential oil yield of O. gratissimum showed significant reduction.•Pretreatment did not alter qualitatively the essential oil of both species. The obj...

Full description

Saved in:

Bibliographic Details
Published in:	Industrial crops and products Vol. 147; p. 112211
Main Authors:	Zotti-Sperotto, Naiara C., Melo, Evandro de C., de Souza, Michelle I.L., Fonseca, Maira C.M., Gonzaga, Diego A., de Ávila, Mariane B.R., Demuner, Antônio J., Ventrella, Marília C., Lelis, Ana C.V.
Format:	Journal Article
Language:	English
Published:	Elsevier B.V 01-05-2020
Subjects:	Alfavaca Cordia verbenacea Erva-baleeira Medicinal plant Post-harvest Ultrasound Post-harvest Erva-baleeira Ultrasound Alfavaca Cordia verbenacea Medicinal plant
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	•Ultrasonic pretreatment reduced drying time of V. curassavica and O. gratissimum.•Pretreatment maximized the essential oil yield of V. curassavica.•Essential oil yield of O. gratissimum showed significant reduction.•Pretreatment did not alter qualitatively the essential oil of both species. The objective of this study was to evaluate the influence of ultrasonic pretreatment combined with the drying using a heat pump, on the drying time, yield and chemical composition of essential oil of Varronia curassavica Jacq. and Ocimum gratissimum Linn. Leaves of both species were submitted to 0, 3, 5, 10, 15, 20 and 30 min ultrasonic pretreatment at 37 kHz and dried at 40 °C in a fixed bed dryer, equipped with a heat pump, with airflow of 0.8 m s−1. Ultrasonic pretreatment reduced drying time, did not cause qualitative alteration in the chemical constituents of the essential oils extracted from the leaves of both species studied and maximized the essential oil yield of V. curassavica. However, the essential oil yield of O. gratissimum showed a significant reduction. For V. curassavica, ultrasound pretreatment that promoted the highest reduction of drying time and higher essential oil yield was 20 min. In O. gratissimum, the pretreatment of 5 min promoted the highest reduction of drying time and the lowest loss of essential oils.
ISSN:	0926-6690 1872-633X
DOI:	10.1016/j.indcrop.2020.112211