کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8330230 | 1540239 | 2015 | 34 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Chemical and rheological properties of exopolysaccharides produced by four isolates of rhizobia
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کلمات کلیدی
CDWPMPE24EPS1-phenyl-3-methyl-5-pyrazoloneRHAFucGlcAFucoseRP-HPLCGlcUV–Vis - UV-VisGalacturonic acid - اسید گالاکاتورونیکGlucuronic acid - اسید گلوکورونیکUltraviolet–visible - اشعه ماوراء بنفش قابل مشاهده استExopolysaccharide - اگزو پلی ساکاریدBioemulsifier - بیو امولسیفایرrhamnose - رامنوزRhizobium - ریزوبیمBiopolymers - زیست بسپارها یا بیوپلیمرهاEmulsification index - شاخص امولسیونMannose - مانوزMan - مردcell dry weight - وزن خشک سلولیreverse phase high-performance liquid chromatography - کروماتوگرافی مایع با کارایی با رزولوشن بالاGal - گالGalA - گالاGalactose - گالاکتوزمی Glucose - گلوکز
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
زیست شیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The rheological, physicochemical properties, emulsification and stability of exopolysaccharides (EPSs) from four rhizobia isolates (LBMP-C01, LBMP-C02, LBMP-C03 and LBMP-C04) were studied. The EPS yields of isolates under these experimental conditions were in the range of 1.5-6.63 g Lâ1. The LBMP-C04 isolate, which presented the highest EPS production (6.63 g Lâ1), was isolated from Arachis pintoi and was identified as a Rhizobium sp. strain that could be explored as a possible potential source for the production of extracellular heteropolysaccharides. All polymers showed a pseudoplastic non-Newtonian fluid behavior or shear thinning property in aqueous solutions. Among the four EPS tested against hydrocarbons, EPS LBMP-C01 was found to be more effective against hexane, olive and soybean oils (89.94%, 82.75% and 81.15%, respectively). Importantly, we found that changes in pH (2-11) and salinity (0-30%) influenced the emulsification of diesel oil by the EPSs. EPSLBMP-C04 presented optimal emulsification capacity at pH 10 (E24 = 53%) and 30% salinity (E24 = 27%). These findings contribute to the understanding of the influence of the chemical composition, physical properties and biotechnology applications of rhizobial EPS solutions their bioemulsifying properties.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Biological Macromolecules - Volume 81, November 2015, Pages 291-298
Journal: International Journal of Biological Macromolecules - Volume 81, November 2015, Pages 291-298
نویسندگان
Cristiane Moretto, Tereza Cristina Luque Castellane, Erica Mendes Lopes, Wellington Pine Omori, LaÃs Postai Sacco, Eliana Gertrudes de Macedo Lemos,