• Cortex Pharmaceuticals Inc., of Irvine, Calif., completed a private placement of a nonconvertible secured promissory note of approximately $400,000 with Samyang Optics Co. Ltd., of Korea. The note will accrue interest at 12 percent annually and is subject to repayment at its maturity date of June 22, 2013, or any time on or after Dec. 22, at Samyang's request.