title: Transport of biologically active material in laser cutting.
abstract: The transport of biologically active material during laser cutting with CO2 and Er lasers is demonstrated. This transport mechanism removes particles from the surface of gelatin, agar, and liver samples into the depth of the laser-formed craters. The transport phenomenon is explained by a contraction and condensation of enclosed hot water vapor. We show by cultivating transported bacteria in agar that biological particles can survive the shock of the transport. Determination of the numbers of active cells evidences a more pronounced activity of the cultivated bacteria after impact with an Er laser than with a CO2 laser.
authors.affiliation: Institute of Applied Physics, University of Berne, Switzerland.
authors.forename: M
authors.initials: M
authors.lastname: Frenz
authors.forename: F
authors.initials: F
authors.lastname: Mathezloic
authors.forename: M H
authors.initials: MH
authors.lastname: Stoffel
authors.forename: A D
authors.initials: AD
authors.lastname: Zweig
authors.forename: V
authors.initials: V
authors.lastname: Romano
authors.forename: H P
authors.initials: HP
authors.lastname: Weber
mesh_terms: D000362:Agar; D000818:Animals; D003238:Connective Tissue / Q000601:surgery; D004926:Escherichia coli; D005780:Gelatin; D006801:Humans; D066298:In Vitro Techniques; D053685:Laser Therapy / Q000009:adverse effects*; D008099:Liver / Q000601:surgery; D008961:Models, Structural; D013530:Surgical Wound Infection / Q000209:etiology*; D013552:Swine
chemical_list: D005780:Gelatin; D000362:Agar