ZBNE.htm

NR ZBNE

AU Wotton,S.B.; O'Callaghan,M.

TI Electrical stunning of pigs: the effect of applied voltage on impedance to current flow and the operation of a fail-safe device

QU Meat Science 2002; 60: 203-8

PT journal article

AB The concept of a 'fail-safe' device to ensure that sufficient current is delivered to render a pig immediately unconscious when electrically stunned was investigated. For live pigs, no significant correlation could be determined between the pre-stun low voltage sensed impedance and the actual, higher voltage stun impedance. In contrast, a good correlation was found using heads from pigs killed more than 24 h previously. The impedance of alive pig's head was predominantly a function of the stunning voltage and decreased non-linearly with increasing voltage. The 'difference' between live and dead pigs was attributed to an 'ageing effect' which is not significant in the first few hours post mortem. No change in phase angle between corresponding stunning current and voltage waveforms, indicated that tissue reactance was not a contributing factor. It is concluded that 'fail-safe' devices based on low voltage pre-stun sensing are unlikely to meet the current legislative requirements (Council Directive 93/119,'EC).

AD Wotton,S.B.; Univ Bristol, Div Food Anim Sci, Dept Clin Vet Med, Langford House, Bristol BS40 5DU, Avon, England

SP englisch

Autorenindex - authors index
Startseite Betäubung - home page Stunning