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Barnes & Noble is dealing with tough competition and changing book-reading habits and has focused on its e-book reader, the Nook, to improve results.

In the fiscal third-quarter its net income fell 14 percent, as rising costs offset a 5 percent revenue increase to $2.44 billion.

Barnes & Noble shares gained 6 cents to $13.45 in morning trading.

MASSACHUSETTS

Japan’s Asahi Kasei to buy Zoll Medical

CHELMSFORD — Japanese chemical manufacturer Asahi Kasei Corp. has agreed to buy Zoll Medical Corp, a Massachusetts-based maker of defibrillators and other critical care medical devices, for about $2.2 billion.

Under the deal announced Monday, Asahi is offering $93 per share for each Zoll share, a 23.8 percent premium over Zoll’s closing price of $75.10 on Friday.

Zoll shares jumped $17.66, or 23.5 percent, to $92.75 in morning trading.

Asahi Kasei is a major Japanese chemical manufacturer with a variety of businesses including health care, construction materials and electronics.

The company said Zoll will help it expand its health care business, an area that Asahi has identified as a key sector of growth. Zoll’s leading position in resuscitation technologies was particularly attractive, Asahi said.

Taketsugu Fujiwara, Asahi Kasei president and representative director, said Zoll will form the cornerstone of Asahi’s critical care business.

From wire dispatches and staff reports