That may've been the case at Unimatrix-01, but Borg that were not around her may've continued to function normally despite here death. This is supported by the fact that the Borg Sphere that was pursuing Voyager continued to function (and attack Voyager, weakening it's armor) even after the Queen had died.
Dow and Union Carbide to merge: two companies that have profited from the deaths of thousands. By Martin McLaughlin. 6 August 1999. Dow Chemical and Union Carbide announced a corporate merger Wednesday, with Dow acquiring control of the smaller firm through a stock swap and assuming its debts, in a deal worth $11.6 billion.
Andrew N. Liveris will be named Executive Chairman and Edward D. Breen will be named CEO of combined company; Advisory Committees will be established for each business; Dow and DuPont shareholders will each own approximately 50 percent of the combined company, on a fully diluted basis, excluding preferred shares