Miners Talvivaara and Aquarius Platinum both fell in line with the mining sector, while transport firm FirstGroup was another heavy faller on the second-tier index after Barclays cut its rating from overweight to equal weight. Citigroup also downgraded the stock today.Domino Printing Sciences said the value of its investment in egg monitoring firm TEN Media had jumped by 25m dollars in just one year. In April 2011 Domino invested $50m in TEN, a business based in California set up to implement improved food safety monitoring, freshness and traceability systems in the egg industry.Cobham, which specialises in meeting the demand for data, connectivity and bandwidth in defence, security and commercial environments, also edged higher after announcing that it is to have another crack at Danish satellite communications outfit Thrane and Thrane. FTSE 250 - RisersAZ Electronic Materials SA (DI) (AZEM) 298.80p +2.33%Kenmare Resources (KMR) 48.85p +2.20%Domino Printing Sciences (DNO) 570.00p +2.15%Elementis (ELM) 188.20p +1.13%Amlin (AML) 320.60p +1.07%Beazley (BEZ) 140.20p +1.01%Pennon Group (PNN) 707.50p +0.86%Computacenter (CCC) 410.60p +0.86%Gem Diamonds Ltd. (DI) (GEMD) 265.00p +0.84%Britvic (BVIC) 383.10p +0.82%FTSE 250 - FallersAquarius Platinum Ltd. (AQP) 131.30p -7.34%Ashtead Group (AHT) 236.80p -6.55%Wood Group (John) (WG.) 675.00p -6.44%Daejan Holdings (DJAN) 3,051.00p -6.32%Ruspetro (RPO) 198.20p -5.75%Talvivaara Mining Company (TALV) 226.50p -5.47%Supergroup (SGP) 587.00p -5.25%RPS Group (RPS) 229.10p -5.10%Exillon Energy (EXI) 127.00p -4.94%FirstGroup (FGP) 203.40p -4.91%NR