title: Adhesion behaviors of Escherichia coli on hydroxyapatite.
abstract: Optimum design of support materials for microorganisms is required for the construction of bioreactors. However, the effects of support materials on microorganisms are still unclear. In this study, we investigated the adhesion behavior of Escherichia coli (E. coli) on hydroxyapatite (HA), polyurethane (PU), poly(vinyl chloride) (PVC), and carbon (Carbon) to obtain basic knowledge for the design of support materials. The total metabolic activity and number of E. coli adhering on the samples followed the order of HA ≈ Carbon>PVC>PU. On the other hand, the water contact angle of the pellet surfaces followed the order of HA<Carbon<PVC<PU. The high hydrophilicity of the HA surface might be one of the suitable characters for the adhesion of E. coli. The results implied that HA has a potential as a support material for microorganisms used in bioreactors.
authors.affiliation: Graduate School of Environmental Studies, Tohoku University, 6-6-20 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan. Electronic address: masanobu.kamitakahara.a6@tohoku.ac.jp.
authors.forename: Masanobu
authors.initials: M
authors.lastname: Kamitakahara
authors.affiliation: Graduate School of Environmental Studies, Tohoku University, 6-6-20 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan.
authors.forename: Shohei
authors.initials: S
authors.lastname: Takahashi
authors.affiliation: Graduate School of Environmental Studies, Tohoku University, 6-6-20 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan.
authors.forename: Taishi
authors.initials: T
authors.lastname: Yokoi
authors.affiliation: Graduate School of Environmental Studies, Tohoku University, 6-6-20 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan.
authors.forename: Chihiro
authors.initials: C
authors.lastname: Inoue
authors.affiliation: Faculty of Economics, Keio University, Building #2-101B, 4-1-1, Hiyoshi, Kohoku-ku, Yokohama 223-8521, Japan.
authors.forename: Koji
authors.initials: K
authors.lastname: Ioku
mesh_terms: D001422:Bacterial Adhesion / Q000187:drug effects*; D017886:Durapatite / Q000737:chemistry / Q000494:pharmacology; D004926:Escherichia coli / Q000378:metabolism*; D057927:Hydrophobic and Hydrophilic Interactions; D011140:Polyurethanes / Q000737:chemistry / Q000494:pharmacology; D011143:Polyvinyl Chloride / Q000737:chemistry / Q000494:pharmacology
chemical_list: D011140:Polyurethanes; D011143:Polyvinyl Chloride; D017886:Durapatite
keywords: Adhesion; Escherichia coli; Hydroxyapatite; Support material