In signing a wide-ranging deal to promote business development, Gov. David A. Paterson announced Monday that a group of Israeli companies would be coming to Stony Brook University in search of sales.

The businesses specialize in a variety of fields, including stem-cell research, alternative energy, nanoscience, homeland security and biotechnology. They will be here in December, seeking to increase business in the United States and purchase equipment and services here.

As New York's fourth-largest trading partner, Israel generates $4.8 billion in commerce each year.

"What we are learning about the new economy . . . which is based on knowledge, technology and innovation, is that it grows proportionally with the ability to collaborate," Paterson said in Manhattan.

The trade mission coming to Stony Brook was announced as Paterson signed a memorandum with Binyamin Ben-Eliezer, Israel's industry, trade and labor minister, to boost commerce ties.

"This agreement no doubt will deepen and strengthen the relationship . . . New Yorkers will benefit," Ben-Eliezer said.

Noting Israel's cadre of firms specializing in antiterrorism equipment, officials at the Long Island Forum for Technology said closer ties between New York and the Jewish state could be a boon for their research facility for homeland security projects, set to open in Bethpage in December. The facility will be housed in a building once used by Grumman Corp.

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Ray Donnelly, LIFT's deputy executive director, said, "Israel has a lot of expertise. This could be an opportunity for us." LIFT reached agreement last month with two Quebec technology groups to collaborate on security projects.