Site Search:











Contact Us

DoD TTIPT

Login
(Register Here)
DOD TechMatch Sponsors
Patent View
 Back to Listing
Patent 8011239 Click For Printable Version of This Patent
Patent Information:  USPTO Site Listing

Patent Number: 8011239
Case ID: 0
Patent Title: In situ sediment ecotoxicity assessment system
Status: ACTIVE
Status Date: 11/29/2011 10:51:52 AM
Issue Date: 9/6/2011
Filed Date: 11/10/2009
Serial #: 2/615,919
Assignee Name: The United States of America as represented by the Secretary of the Navy (Washington, DC)
Inventor(s): Chadwick, David B. , Rosen, Gunther H. , Burton, G. Allen
Lab Information:  View Lab Profile

Lab Name: SPAWAR Systems Center, Pacific
Location: 53560 Hull Street
San Diego, CA 92152-5001
Contact: Contact Lab About This Patent
   
Description:
BACKGROUND

The last several years have seen an increase in the number of occurrences of contamination of aquatic systems with harmful bacteria and/or toxic substances. When such contaminations occur, it is paramount that the effects of such contamination be studied. One method of characterizing the exposure and effects of aquatic system contamination is by sampling sediment in a contaminated region and then performing tests on the sediment in a laboratory environment. This process typically involves taking multiple sediment samples from a particular location at specific time intervals, removing the samples from the sampling location, and adding the sediment samples to beakers or aquaria in a laboratory at a later time period. Test organisms are then added and tests are conducted for a specific time period under strictly controlled laboratory conditions using standardized toxicity testing protocols. The above sediment contamination assessment approach is well established,  . . . . More
Abstract:
A system includes a plurality of chamber holders having openings therein, and an exposure chamber positioned in each chamber holder. Each exposure chamber includes a mesh portion and a top end cap. One exposure chamber contains a mesh bottom and one contains a closed bottom. Each chamber holder is positioned within an opening contained within a base portion. One exposure chamber may extend beyond the lower boundary of the base portion. A top portion may be secured to the base portion to contain the chamber holders. A pump, with connected supply hose, may be coupled to the top portion. The supply hose is routed through the chamber holders such that a supply hose opening is adjacent to each chamber holder. The system may include a water quality sensor and a passive sampling device coupled to the base portion. A deployment system may be connected to the top portion.
Claims:
We claim:

1. A system comprising: a plurality of chamber holders, each chamber holder containing a plurality of chamber holder openings; and an exposure chamber positioned in each of the chamber holders, each exposure chamber comprising a mesh portion and a top end cap, wherein at least one of the exposure chambers contains a mesh bottom and at least one of the exposure chambers contains a closed bottom.

2. The system of claim 1 further comprising a base portion having a plurality of base portion openings, wherein each chamber holder is positioned within one of the base portion openings.

3. The system of claim 2, wherein the chamber holders are cylindrical in shape and are permanently coupled to the base portion.

4. The system of claim 2, wherein at least one of the exposure chambers extends beyond the lower boundary of the base portion.

5. The system of claim 2 further comprising a top portion secured to the base portion such that the  . . . . More