PMID- 20813373
OWN - NLM
STAT- MEDLINE
DCOM- 20101220
LR  - 20100920
IS  - 1873-3778 (Electronic)
IS  - 0021-9673 (Linking)
VI  - 1217
IP  - 40
DP  - 2010 Oct 1
TI  - Extraction of essential oils from Algerian myrtle leaves using instant controlled 
      pressure drop technology.
PG  - 6134-42
LID - 10.1016/j.chroma.2010.07.080 [doi]
AB  - In the present work, the new extraction process of Detente Instantanee Controlee 
      DIC (French, for instant controlled pressure drop) was studied, developed, 
      quantitatively and qualitatively compared to the conventional hydrodistillation 
      method for the extraction of essential oils from Algerian myrtle leaves. DIC was 
      used as a thermomechanical treatment, DIC subjecting the product to a 
      high-pressure saturated steam. The DIC cycle ends with an abrupt pressure drop 
      towards vacuum, and this instantly leads to an autovaporization of myrtle 
      volatile compounds. An immediate condensation in the vacuum tank produced a 
      micro-emulsion of water and essential oils. Thus, an ultra-rapid cooling of 
      residual leaves occurred, precluding any thermal degradation. An experimental 
      protocol was designed with 3 independent variables: saturated steam pressure 
      between 0.1 and 0.6 MPa, resulting in a temperature between 100 and 160 degrees C, a 
      total thermal processing time between 19 and 221 s, and between 2 and 6 DIC 
      cycles. The essential oils yield was defined as the main dependent variable. This 
      direct extraction gave high yields and high quality essential oil, as revealed by 
      composition and antioxidant activity (results not shown). After this treatment, 
      the myrtle leaves were recovered and hydrodistilled in order to quantify the 
      essential oil content in residual DIC-treated samples. Scanning electron 
      microscope (SEM) showed some modification of the structure with a slight 
      destruction of cell walls after DIC treatment.
CI  - Copyright (c) 2010 Elsevier B.V. All rights reserved.
FAU - Berka-Zougali, Baya
AU  - Berka-Zougali B
AD  - University of La Rochelle; Transfer Phenomena and Instantaneity in Agro-industry 
      and Building-Pole Science and Technology, Avenue Michel Crepeau, 17042 La 
      Rochelle cedex 01, France.
FAU - Hassani, Aicha
AU  - Hassani A
FAU - Besombes, Colette
AU  - Besombes C
FAU - Allaf, Karim
AU  - Allaf K
LA  - eng
PT  - Journal Article
DEP - 20100811
PL  - Netherlands
TA  - J Chromatogr A
JT  - Journal of chromatography. A
JID - 9318488
RN  - 0 (Oils, Volatile)
RN  - 0 (Terpenes)
SB  - IM
MH  - Analysis of Variance
MH  - Distillation/*methods
MH  - Gas Chromatography-Mass Spectrometry
MH  - Microscopy, Electron, Scanning
MH  - Myrtus/*chemistry
MH  - Oils, Volatile/chemistry/*isolation & purification
MH  - Plant Leaves/chemistry
MH  - Pressure
MH  - Temperature
MH  - Terpenes
EDAT- 2010/09/04 06:00
MHDA- 2010/12/21 06:00
CRDT- 2010/09/04 06:00
PHST- 2010/05/21 00:00 [received]
PHST- 2010/07/21 00:00 [revised]
PHST- 2010/07/27 00:00 [accepted]
PHST- 2010/09/04 06:00 [entrez]
PHST- 2010/09/04 06:00 [pubmed]
PHST- 2010/12/21 06:00 [medline]
AID - S0021-9673(10)01053-8 [pii]
AID - 10.1016/j.chroma.2010.07.080 [doi]
PST - ppublish
SO  - J Chromatogr A. 2010 Oct 1;1217(40):6134-42. doi: 10.1016/j.chroma.2010.07.080. 
      Epub 2010 Aug 11.