Characterization of Za’tar (thyme) mixture

Main Article Content

Hanee M. Al-Dmoor

Keywords

quality factors, sesame, sumac, thyme, Za’tar mixture

Abstract

Introduction Five formulae of Za’tar mixtures were analysed to determine the characterization and identify the quality factors of this food product. Methods The formulae were based on differing mixtures of ingredients which affect the characteristics and qualities of the product. Results The averages of moisture, ash, oil, protein, crude fibre and availabl carbohydrate percentage for the tested mixtures were 4.21, 9.15, 6.86, 11, 8.5 and 60.2, respectively. The extracted essential oil content in Za’tar mixtures ranged from 2.7% in Jabali to 2.01% in Extra Za’tar. Salt,acidity, insoluble ash in hydrochloric acid, gross energy and density values were of higher formulae, containing less than 25% of thyme and 3% sumac. The overall acceptability of the Za’tar mixture showed Super and Jabali Za’tar mixtures which are high in thyme, sesame, sumac that are more preferred by the consumers. The overall acceptability as well as preference sensory tests correlated positively (P < 0.005) with both thyme and sumac which are the major ingredients in Za’tar mixtures. In contrast, all of the other components in the Za’tar mixture were negatively correlated (P < 0.005) with the overall panellist acceptability and preference. Conclusions Ingredients, proximate analysis, gross energy, insoluble acid ash, essential oil content, acidity, density, microscopic test and sensory properties can be used to measure the quality of this food product.

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References

AOAC. (2000)Official Methods of Analysis of International,17th edn. Association of Official Analytical Chemists International, Gaithersburg, MD.
Dob T., Dahmane D., Benabdelkader T., Chelghoum C. (2006) Studies on the essential oil composition and antimicrobial activity of Thymus algeriensis Boiss. International Journal of Aromatherapy, 16, 95–100.
Fazeli M., Amin G., Attari M., Ashtiani H., Jamalifar H.,Samadi N. (2007) Antimicrobial activities of Iranian sumac and avishan-e shirazi (Zataria multiflora) against some food-borne bacteria. Food Control,18, 646–649.
Gutierrez J., Barry-ryan C., Bourke P. (2008) The antimicrobial efficacy of plant essential oil combinations and interactions with food ingredients. International Journal of Food Microbiology,124, 91–97.
Hinneburg I., Damien H., Hiltunen R. (2006) Antioxidant activities of extracts from selected culinary herbs and spices. Food Chemistry,97, 122–129.
Jinyoung L., Yoosung L., Eunok C. (2008) Effects of sesamol, sesamin, and sesamolin extracted from roasted sesame oil on the thermal oxidation of methyl linoleate. Food Science and Technology, 41, 1871–1875.
Kosar M., Bozan B., Temelli F., Baser K. (2007) Antioxidant activity and phenolic composition of sumac (Rhus coriariaL.) extracts. Food Chemistry,103, 952–959.
Lawless H., Hildegarde H. (1999) Sensory Evaluation of Food: Principles and Practices. pp. 20–170, Aspen Publishers Inc., Gaithersburg, MD.
SAS Institute. (2008) SAS User’s Guide. SAS Institute Inc.,Cary, NC.
Sierra R. (2008) Chemical profiles of essential oils and non-polar extractable from Sumac (Rhus). Electronic Journal of Food and Plants Chemistry, 3, 5–9.
Soliman M., Badeaa I. (2002) Effect of oil extracted from some medicinal plants on different mycotoxigenic fungi. Food Chemistry and Toxicology, 40, 1669–1675.
Stahl-biskup E. (1991) The chemical composition of Thymusoils: a review of the literature 1960–1989. Journal of Essential Oil Research,3, 61–82.
Steel D., Torrie H., Dickey D. (1996) Principles and Procedures of Statistics: A Biometrical Approach, 3rd edn. McGraw-Hill Book Co., New York.
Wu W. (2007) The contents of lignans in commercial sesame oils of Taiwan and their changes during heating. Food Chemistry, 104, 341–344.