Microbiology and Biochemistry of Duma: Fermented Honey Drink of Southern Sudan

الموضوعات

زراعة

الملخص

Duma is a fermented honey drink commonly found in southern Sudan.Ethanol content of collected samples ranged from 4.3% to 10.2%, and total acidityranged from 0.73% to 1.08%, while volatile fatty acids were very low.Laboratory fermentation showed that duma fermentation is an alcoholicfermentation as shown by an increase in yeast count producing 8.25% ethanol. Thefermentation is also a lactic fermentation, which is indicated by the increase inlactic bacteria dropping the pH from 4.9 to 3.02. During the process total acidityincreased from 0.12% to 0.8%.Tentative identification of microorganisms showed that yeast isolates belonged toSchizosaccharomyces pombe, Schizosaccharomyces octosporus, andSaccharomyces cerevisiae, while lactic acid bacteria belonged to Lactobacillubrevis, L. fermentum, L. plantarum and Pediococcus damnosus.Microorganisms that were responsible for fermentation were used asstarter culture in laboratory fermentation. The result indicated thatfermentation by this method is faster than the traditionalfermentation. Metabolic products were characterized by an increase inethanol to 9.86% and a total acidity of 0.75%. The pH dropped from 4.7to 3.0, and volatile fatty acids were very low.Physiological studies have shown that yeast isolates were thermophilicand osmotolerant. With respect to salt tolerance, all isolates were ableto grow at 10% sodium chloride.

روابط وملفات

التعريف والنوع

رقم الوثيقة

076c9bc6-20fd-46b1-9eb5-4f4c7e676e25

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل دكتوراة

نوع الملف

pdf text

أسماء الملفات

1623950_1.pdf

بيانات النشر

ألقاب المؤلفين

[{"name_ar":"حامد احمد","title_ar":"اشراف","title_en":"Supervision"},{"name_ar":"ندا حسن","title_ar":"اعداد","title_en":"Preparation"}]

اللغة

English

المصدر والدورية

اسم المصدر

Microbiology and Biochemistry of Duma: Fermented Honey Drink of Southern Sudan

المحتوى والصفحات

عدد الصفحات

0

إشراف وإعداد

الإشراف

حامد احمد

الإعداد

ندا حسن

الاقتباسات الببليوغرافية