Study of adding microbial transglutaminase enzyme on the volatile compounds of traditional kefir beverage

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Beirami Serizkani F.; HOJJATI M.; JOOYANDEH H.

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Journal: Journal of food science and technology Year:2019 | Volume:16 | Issue:91 Page(s): 31-43

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Title

Study of adding microbial transglutaminase enzyme on the volatile compounds of traditional kefir beverage

Author(s)

Beirami Serizkani F. | HOJJATI M. | JOOYANDEH H. | Issue Writer Certificate

Keywords

Fermented dairy drinkQ1

Microbial transglutaminaseQ1

SyneresisQ2

Gas chromatographyQ2

Abstract

Kefir is a kind of dairy drink with unique and exotic flavor that is traditionally produced from fermented milk with kefir grains included a mix of bacteria and yeasts. The phase separation during storage of kefir results in an unfavorable appearance, which is known as a defect, which can be controlled by making the cross-links between the milk proteins. In this research, the addition of the Microbial transglutaminase enzyme (m-TG) to diminish the Syneresis and its effect on the aromatic compounds of kefir was investigated during one-month storage at a refrigerated temperature using a solid phase microextraction method combined with a Gas chromatography– mass spectrometer. The results showed that the adding of the m-TG to kefir significantly affected the Syneresis of kefir and caused reduce in phase separation of kefir during storage. In total, 51 volatile compositions were isolated and identified from kefir samples using SPME-GC/MS. Most of the identified compounds include acids, alcohols, ketones, esters, and aldehydes, respectively. The results indicated that the storage time significantly affected the amount of all volatile compositions, so that some volatile compounds increased, while some volatile compounds decreased during storage. The m-TG had no effect the content of the volatile constituents except for alcohols. The findings of this study revealed that the total amounts of alcoholic and acidic compounds as well as carbon dioxide were increased during storage. On the other hand, total amounts of ketones, aldehydes and esters in kefir decreased during storage. Based on the findings of this study, it could be concluded that the use of m-TG without significant effect on the properties of aromatic compounds of kefir reduces its Syneresis during storage.

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APA: Copy

Beirami Serizkani, F., HOJJATI, M., & JOOYANDEH, H.. (2019). Study of adding microbial transglutaminase enzyme on the volatile compounds of traditional kefir beverage. IRANIAN JOURNAL OF FOOD SCIENCE AND TECHNOLOGY, 16(91 ), 31-43. SID. https://sid.ir/paper/71676/en

Vancouver: Copy

Beirami Serizkani F., HOJJATI M., JOOYANDEH H.. Study of adding microbial transglutaminase enzyme on the volatile compounds of traditional kefir beverage. IRANIAN JOURNAL OF FOOD SCIENCE AND TECHNOLOGY[Internet]. 2019;16(91 ):31-43. Available from: https://sid.ir/paper/71676/en

IEEE: Copy

F. Beirami Serizkani, M. HOJJATI, and H. JOOYANDEH, “Study of adding microbial transglutaminase enzyme on the volatile compounds of traditional kefir beverage,” IRANIAN JOURNAL OF FOOD SCIENCE AND TECHNOLOGY, vol. 16, no. 91 , pp. 31–43, 2019, [Online]. Available: https://sid.ir/paper/71676/en

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