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Iranian Biomedical Journal، جلد ۶، شماره ۲، صفحات ۶۹-۷۵

عنوان فارسی Comparison of Lactic Acid Isomers Produced by Fungal and Bacterial Strains
چکیده فارسی مقاله
کلیدواژه‌های فارسی مقاله Lactic acid، Production، Optical isomers

عنوان انگلیسی Comparison of Lactic Acid Isomers Produced by Fungal and Bacterial Strains
چکیده انگلیسی مقاله Many organisms produce lactic acid by fermentation, but most industrially important strains are from the genus Lactobacillus and Rhizopus oryzae. L(+)-Lactic acid is the only optical isomer for use in pharmaceutical and food industries because human body is only adapted to assimilate this form. In this research, six strains of Lactobacillus and four strains of R. oryzae (known as high producer) were examined for optical isomers of lactic acid. The production of lactic acid was improved and lactic acid produced in submerged media on rotary shaker incubator. The optical isomers of lactic acid were examined by L(+) and D(-) lactate dehydrogenase kit. All the R. oryzae strains tested produced only L(+) isomer of lactic acid. The highest fungal and bacterial producer strains were R. oryzae PTCC 5263, Lactobacillus plantarum PTCC 1058, L. Bulgaricus PTCC 1332 and L. delbruekii subsp delbruekii PTCC 1333. Lactobacilli strains produced combination of both optical isomers of lactic acid. Among them, L. casei subsp. Casei produced the low amount of D(-)-lactic acid (2%). The optimum concentration of glucose for lactic acid production by R. oryzae and Lactobacillus strains were 180 g/l and 80–120 g/l, respectively.
کلیدواژه‌های انگلیسی مقاله Lactic acid, Production, Optical isomers

نویسندگان مقاله سعید میردامادی | saeed mirdamadi


هاجر صادقی | hajar sadeghi


نورا شرفی | nora sharafi


مسعود فلاح پور | masoud fallahpour


فرزانه عزیز محسنی | farzaneh aziz mohseni


محمد رضا بختیاری | mohammad reza bakhtiari



نشانی اینترنتی http://ibj.pasteur.ac.ir/browse.php?a_code=A-10-1-298&slc_lang=en&sid=en
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