Microencapsulation of Rosemary Essential Oil by Co-Extrusion/Gelling Using Alginate as a Wall Material

An essential oil is the volatile lipophilic component extracted from plants. Microencapsulation systems protect the essential oil from degradation and evaporation, and at the same time allow a sustained release. This work analyzed and characterized the rosemary essential oil microcapsules prepared by co-extrusion technique using alginate as wall material and calcium chloride as cross linker. Several instrumental techniques were used: optical microscopy, coulter counter, Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), termogravimetric analysis (TGA), spectrophotometry, antimicrobial test and chromatography. Results show that rosemary oil has pesticidal properties, and its microencapsulation allows knowing that these properties remain inside the microcapsules.

[1]  S. V. Borges,et al.  Gum arabic/starch/maltodextrin/inulin as wall materials on the microencapsulation of rosemary essential oil. , 2014, Carbohydrate polymers.

[2]  R. Palma,et al.  Encapsulación de biomoléculas usando polímeros naturales: “un nuevo enfoque en la entrega de fármacos en medicina” , 2014 .

[3]  A. Bakhrouf,et al.  Essential oil of Thymus vulgaris L. and Rosmarinus officinalis L.: Gas chromatography-mass spectrometry analysis, cytotoxicity and antioxidant properties and antibacterial activities against foodborne pathogens , 2013 .

[4]  T. Nishihara,et al.  Antifungal activity of chemotype essential oils from rosemary against Candida albicans , 2013 .

[5]  A. Y. El-Moghazy,et al.  Microencapsulation of Essential Oils within Alginate: Formulation and in Vitro Evaluation of Antifungal Activity , 2013 .

[6]  G. Hernández-Carmona,et al.  Avances tecnológicos en la producción de alginatos en México , 2012 .

[7]  J. Amalvy,et al.  Yerba Mate Extract Encapsulation with Alginate and Chitosan Systems: Interactions between Active Compound Encapsulation Polymers , 2011 .

[8]  E. Chan,et al.  Prediction models for shape and size of ca-alginate macrobeads produced through extrusion-dripping method. , 2009, Journal of colloid and interface science.

[9]  S. Jafari,et al.  Encapsulation Efficiency of Food Flavours and Oils during Spray Drying , 2008 .

[10]  H. Hense,et al.  Rosemary (Rosmarinus officinalis): a study of the composition, antioxidant and antimicrobial activities of extracts obtained with supercritical carbon dioxide , 2008 .

[11]  G. González-Aguilar,et al.  High relative humidity in-package of fresh-cut fruits and vegetables: advantage or disadvantage considering microbiological problems and antimicrobial delivering systems? , 2008, Journal of food science.

[12]  T. Efferth,et al.  Antimicrobial activity of clove and rosemary essential oils alone and in combination , 2007, Phytotherapy research : PTR.

[13]  K. Kailasapathy.  Microencapsulation of probiotic bacteria: technology and potential applications. , 2002, Current issues in intestinal microbiology.

[14]  M. Mueller,et al.  Low-temperature electron microscopy for the study of polysaccharide ultrastructures in hydrogels. II. Effect of temperature on the structure of Ca2+-alginate beads. , 2002, Biotechnology and bioengineering.

[15]  B. Amsden,et al.  Solute Diffusion within Hydrogels. Mechanisms and Models , 1998 .

[16]  L. Bullerman,et al.  Mould spoilage and mycotoxin formation in grains as controlled by physical means. , 1988, International journal of food microbiology.

[17]  Ý. Mørch.  Novel Alginate Microcapsules for Cell Therapy – A study of the structure-function relationships in native and structurally engineered alginates , 2008 .

[18]  H. Yoshizawa.  Trends in Microencapsulation Research , 2004 .

[19]  U. Ravid,et al.  Antifungal Activity of Oregano and Thyme Essential Oils Applied as Fumigants Against Fungi Attacking Stored Grain. , 1995, Journal of food protection.

[20]  D. McHugh.  Production and utilization of products from commercial seaweeds , 1987 .