JOINDER TO SECURITY AGREEMENT

Exhibit 10.5

JOINDER TO

SECURITY AGREEMENT

This Joinder to Security Agreement (“Joinder”) is made on this _________, 2010 (the “Effective Date”) by  ________________ (“Investor”).

WHEREAS, as of the date hereof, Applied DNA Sciences, Inc., a Delaware corporation (the “Company”) has issued and sold to the Investor a senior secured convertible note (the “Investor Note”) in a private placement transaction (the “Offering”);

WHEREAS, as part of the Offering, the Investor will become a party to that certain Security Agreement (the “Security Agreement”), dated as of July 15, 2010 made by APDN (B.V.I.) Inc., a corporation organized under the laws of the British Virgin Islands and wholly owned subsidiary of the Company (“BVI”), in favor of Etico Capital, LLC, a limited liability company organized under the laws of Delaware, as Collateral Agent for the Buyers (as defined in the Security Agreement), pursuant to which the Investor Note will be secured by a security interest in all of the assets of BVI.

NOW, THEREFORE, in consideration of the foregoing premises and the mutual covenants and agreements contained herein, the parties hereto agree as follows:

1.           Joinder to Security Agreement.  Investor hereby agrees to be become a party to and to be bound by all of the terms and provisions of the Security Agreement as a Buyer for all purposes thereunder.  In addition, the Investor Note will be deemed to be a “Note” (as defined in the Security Agreement).

2.           Applicable Law. This Joinder will be construed in accordance with, and the rights of the parties governed by, the laws of the State of New York, without regard to the choice of law provisions thereof.

3.           Counterparts; Incorporation.  This Joinder may be executed in any number of counterparts, each of which shall be deemed an original and all of which taken together shall constitute one and the same instrument.  The recitals to this Joinder are hereby incorporated by reference and made a part hereof for all purposes.

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IN WITNESS WHEREOF, the parties hereto have executed this Joinder as of the date first above written.

[INVESTOR]

By:_________________________________

Name:

Title:

AGREED TO AND ACCEPTED:

APDN (B.V.I.), INC.,

a Delaware corporation

By:_____________________________

Xx. Xxxxx X. Xxxxxxx

President and Chief Executive Officer

ETICO CAPITAL, LLC.,

a Delaware limited liability corporation

By:_____________________________

Xxxxx X. Xxxxxxx

Managing Director