title: Extraction of hyaluronic acid (HA) from rooster comb and characterization using flow field-flow fractionation (FlFFF) coupled with multiangle light scattering (MALS).
abstract: Hyaluronic acid (HA) was extracted in a relatively large scale from rooster comb using a method similar to that reported previously. The extraction method was modified to simplify and to reduce time and cost in order to accommodate a large-scale extraction. Five hundred grams of frozen rooster combs yielded about 500 mg of dried HA. Extracted HA was characterized using asymmetrical flow field-flow fractionation (AsFlFFF) coupled online to a multiangle light scattering detector and a refractive index detector to determine the molecular size, molecular weight (MW) distribution, and molecular conformation of HA. For characterization of HA, AsFlFFF was operated by a simplified two-step procedure, instead of the conventional three-step procedure, where the first two steps (sample loading and focusing) were combined into one to avoid the adsorption of viscous HA onto the channel membrane. The simplified two-step AsFlFFF yielded reasonably good separations of HA molecules based on their MWs. The weight average MW (M(w) ) and the average root-mean-square (RMS) radius of HA extracted from rooster comb were 1.20×10(6) and 94.7 nm, respectively. When the sample solution was filtered through a 0.45 μm disposable syringe filter, they were reduced down to 3.8×10(5) and 50.1 nm, respectively.
authors.affiliation: Department of Chemistry, Hannam University, Daejeon, Korea.
authors.forename: Dong Young
authors.initials: DY
authors.lastname: Kang
authors.forename: Won-Suk
authors.initials: WS
authors.lastname: Kim
authors.forename: In Sook
authors.initials: IS
authors.lastname: Heo
authors.forename: Young Hun
authors.initials: YH
authors.lastname: Park
authors.forename: Seungho
authors.initials: S
authors.lastname: Lee
mesh_terms: D000818:Animals; D002645:Chickens; D003129:Comb and Wattles / Q000737:chemistry*; D031521:Fractionation, Field Flow; D006820:Hyaluronic Acid / Q000737:chemistry / Q000302:isolation & purification*; D008027:Light; D008297:Male; D012542:Scattering, Radiation
chemical_list: D006820:Hyaluronic Acid