Publications by authors named "Nahyun M Kim"

Coffee, an important global commodity, is grown on 10.2 million hectares in over 80 countries. Arabica coffee () is popular worldwide due to its superior flavour.

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The current study deciphers the processing of different proportions of white flour and whole wheat flour (100:0, 75:25, 50:50: 25:75, and 0:100) into a pizza base using yeast-based fermentation. The bread making using the yeast system resulted in significant changes in the characteristics of bread, ranging from the porous structure development to the crumb cellular structure modifications. An increase in the proportions of whole wheat flour resulted in the formation of golden yellow pizza bases.

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Astragalin (kaempferol-3-O-β-d-glucopyranoside, Ast) is a kind of flavonoid known to have anti-oxidant, anti-HIV, anti-allergic, and anti-inflammatory effects. It has low solubility in water. In this study, novel astragalin galactosides (Ast-Gals) were synthesized using β-galactosidase from Bacillus circulans and reaction conditions were optimized to increase the conversion yield of astragallin.

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Epigallocatechin gallate (EGCG) is the most abundant catechin found in the leaves of green tea, Camellia sinensis. In this study, novel epigallocatechin gallate-glucocides (EGCG-Gs) were synthesized by using dextransucrase from Leuconostoc mesenteroides B-1299CB4. Response surface methodology was adopted to optimize the conversion of EGCG to EGCG-Gs, resulting in a 91.

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Objectives: To determine the inhibitory activities of flavonoids against NS2B-NS3 protease of ZIKA virus (ZIKV NS2B-NS3) expressed in Escherichia coli BL21 (DE3) and their structure activity relationship.

Results: ZIKV NS2B-NS3 was expressed in E. coli BL21(DE3) as a 35 kDa protein.

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Background: The potential of fermented buckwheat as a feed additive was studied to increase l-carnitine and γ-aminobutyric acid (GABA) in designer eggs. Buckwheat contains high levels of lysine, methionine and glutamate, which are precursors for the synthesis of l-carnitine and GABA. Rhizopus oligosporus was used for the fermentation of buckwheat to produce l-carnitine and GABA that exert positive effects such as enhanced metabolism, antioxidant activities, immunity and blood pressure control.

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Steviol is a diterpene isolated from the plant Stevia rebaudiana that has a potential role as an antihyperglycemic agent by stimulating insulin secretion from pancreatic beta cells and also has significant potential to diminish the renal clearance of anionic drugs and their metabolites. In this study, the lacS gene, which encodes a thermostable β-glycosidase (SSbgly) enzyme from the extremely thermoacidophillic archaeon Sulfolobus solfataricus, was cloned and expressed in E. coli Rossetta BL21(DE3)pLyS using lactose as an inducer.

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