A two-day auction began Monday for the kitchen equipment at Nitrogenie, following the closure of the Australian ice cream company's first U.S. location at Ala Moana Center in Honolulu. The closing of Nitrogenie on Sunday followed last month’s closing of the Magnolia Bakery restaurant and kiosk at Ala Moana Center. Both franchised stores were owned by Japan’s Food Planet Inc., an international food and beverage holding company. Oahu Auctions, which held an auction last month for Magnolia Bakery’s…