lfm1001

Frozen cider was thawed in a refrigerator at 4 C and then autoclaved for Tiffany 1837 Ring prior to the PL treatments. Clarified cider was otained from the same atch of raw cider y cold microfiltration using a Tami Isoflux ceramic memrane (GEA Filtration, Hudson, WI) of 0.45-m pore size, with 23 channels of 3.5-mm hydraulic diameter. The process parameters for microfiltration were as follows: crossflow velocity, 7 m/s; transmemrane pressure, Tiffany Cushion ring temperature, 6 C. The pH and sugar content (in degrees rix) of the cider and juice were determined using a pH meter (Fisher Scientific, Pittsurgh, PA) and a Digital Fieroptic Refractometer (Misco, Cleveland, OH), respectively.PL fluence measurements. The dose of the PL treatments (fluence), Elsa Peretti Sevillana ring in joules per square centimeter, was quantified for all treatments. Fluence measurements were taken using a pyroelectric head (PE25H) with a Nova II display (Ophir Optronics Inc., Wilmington, MA). Elsa Peretti Open Heart ring pyroelectric head was placed centrally on an adjustale stainless steel shelf in the PL unit at given distances eneath the Xenon lamp. A stainless steel aperture cover was placed over the head and completely covered the top surface of the head except for a 1-cm^sup 2^ circular opening that exposed the detector's surface. The opening was centered on the detector's surface. On the Nova II display, the pulse width setting was 1.0 ms and the wavelength setting was <0.3 nm.