Independent Administrative Institution, Japan Agency for Marine-earth Science and Technology

Japan Marine Science and Technology Center

Kaoru Tsujii

Shigeru Deguchi

Noriaki Masui

Koki Horikoshi

Hiroshi Kitazato

A core sample collector includes a cylinder and a piston, wherein the piston includes a piston body, upper piston rings and lower piston rings, and a sterilizing agent is held in a space defined between the piston, the cylinder, the upper piston ring and the lower piston ring. The sterilizing agent may be an antimicrobial polymeric gel. A core sample is collected by contacting the cylinder against a surface from which the core sample is to be taken, and causing relative movement between the cylinder and the piston such that: (i) the sterilizing agent is applied to the inner peripheral wall surface of the cylinder, (ii) the upper and lower piston rings scrape the sterilizing agent from the inner peripheral wall, and (iii) a core is received in the cylinder.

Core sample collector equipped with sterilizing agent-applying mechanism and method of taking core sample

Disclosed herein is a method of coring a crustal core sample, which comprises using a crustal core sampler equipped with a flow-able coating material-ejecting mechanism for ejecting a flow-able coating material, and ejecting the flow-able coating material composed of a polymer substance having a colloidal particles capturing ability by aggregating function and a water-absorbing polymer substance, from the flow-able coating material-ejecting mechanism of the crustal core sampler thereby coring a crustal core sample in a state coated with the flow-able coating material.

Method of coring a crustal core sample and flow-able coating material for coring a crustal core sample

A method of taking a crustal core sample, wherein the crustal core sample is obtained in a state coated with an antimicrobial polymeric gel formed of a polymer and an inorganic antimicrobial agent dispersed in the polymer. The inorganic antimicrobial agent is a compound containing at least one of silver, zinc or ions thereof. The inorganic antimicrobial agent is carried on a carrier material. The polymer forming the antimicrobial polymeric gel contains a hydrophilic group, and the antimicrobial polymeric gel contains the inorganic antimicrobial agent in a proportion of 0.0001 to 10.0 mass %.

Method of coring crustal core sample, and antimicrobial polymeric gel and gel material used in the method

A method of taking a crustal core sample, wherein the crustal core sample is obtained in a state coated with an antimicrobial polymeric gel formed of a polymer obtained by polymerizing an antimicrobial monomer, preferably a quaternary ammonium salt compound. The polymer preferably contains a component derived from the antimicrobial monomer in a proportion of 1 to 10 mol%.

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Kanagawa, Japan

Kaoru Tsujii