Revenues at surveillance and security technology provider Quadnetics declined 5% from £64.65m to £61.28m for the year ended 30 November after restructuring its integration and managed services (IMS) division.Nevertheless, pre-tax profit totalled £1.4m, from a loss of £0.2m in 2009, after a reduction in the cost of sales and operating expenses. Underlying profits grew 77% to £2.6m, from £1.5m previously.Newspaper publisher Johnston Press has appointed Grant Murray as the successor of Stuart Paterson as its chief financial offer, effective from 3 May. Murray joins the Scotsman and Yorkshire Post publisher from Guardian Media and has held senior financial roles with Channel 5 Broadcasting and business publisher United Business Media.Beijing-based private equity investment firm Origo Partners has acquired at least a 21% stake in Chinese rice processing and distribution group China Rice for $13m. The final equity stake will be between 21-29% (on a fully diluted basis) as determined by the profitability of the China Rice in 2011."Our investment in China Rice is a play on both soft-commodities and rising Chinese consumerism at a particularly opportune moment in the cycle, given rising inflation and government support for the Chinese agricultural sector," said chief executive Chris Rynning.