	rtz sees rising u s output aiding results rio tinto zinc corp plc rtzl l rtz said the predicted rise in industrial production in the u s and europe should boost its performance consumption of some base metals and their dlr prices are showing signs of improvement although iron ore markets have weakened the oil price in u s dlrs is above the average and if sustained should improve energy ings the company was commenting in a statement on its results which on a restated basis showed net attributable profits lower at mln stg after mln the previous year pretax profits also dipped to mln stg after mln rtz said the excellent performance of its expanding range of industrial businesses in was offset by the collapse in oil prices industrial businesses contributed mln stg to net profit a pct increase from mln in and pct of the total trading performance improved at wholly owned subsidiaries rtz borax ltd rtz cement ltd rtz chemicals ltd and rtz pillar ltd first time contributions from recent investment and acquisitions mainly in speciality chemicals and minerals also aided performance metals activities contributed mln stg to net profit 
