Security alarms specialist Visonic gained as it reported a 33% increase in pre-tax profit to $5.7m in the six month ended June.'This improved performance was achieved mainly as a result of a variety of efficiency improvement measures taken by management while continuing to focus on R&D and Sales and Marketing programs,' said chairman Yaacov Kotlicki.PuriCore is today's biggest faller. The life sciences group announced that it closed on a new $2.1m debt facility with Republic First Bank. The debt will be drawn down through the fourth quarter and is structured as a 36-month promissory note with an imputed interest rate of 5.9%. Meanwhile, interim results showed that sales dropped by 2%, or 8% on a constant currency basis, to $19.1m, while pre-tax losses narrowed to £5.35m from £6.82m last time.FTSE TechMARK - RisersVisonic (VSC) 68.00p +7.09%Trafficmaster (TFC) 34.00p +6.25%Psion (PON) 101.00p +5.21%Electronic Data Processing (EDP) 43.50p +4.82%Axis-Shield (ASD) 354.00p +4.12%E2V Technologies (E2V) 53.75p +3.37%Oxford Instruments (OXIG) 165.00p +3.12%Consort Medical (CSRT) 379.50p +2.57%Phoenix IT Group (PNX) 242.50p +2.32%Innovation Group (TIG) 11.25p +2.27%FTSE TechMARK - FallersPuricore (PURI) 15.00p -11.76%ProStrakan (PSK) 132.00p -4.69%Filtronic (FTC) 33.25p -4.32%Ark Therapeutics (AKT) 47.50p -4.04%Wolfson Microelectronics (WLF) 138.00p -3.66%BATM Advanced (BVC) 41.00p -3.53%Corin Group (CRG) 58.00p -3.33%Xaar (XAR) 85.00p -2.86%Asterand (ATD) 27.00p -2.70%Renovo Group (RNVO) 30.00p -2.44%