ISSN:
1750-3841
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
: Orange juice clarification by thermostable pectinmethylesterase (TS-PME), isolated from grapefruit pulp by ammonium sulfate precipitation, and ion-exchange and affinity chromatography was investigated. TSPME, having different specific activities, induced different clarification behavior of reconstituted orange juice at 2 units/ml. Based on percent transmittance, TS-PME fraction with the lower specific activity clarified juices earlier than TS-PME at higher specific activity. Particle size distribution of the cloud-soluble fraction showed that TS-PME increased the average particle size from 0.7 μm to 1 mm and maintained a monomodal distribution. After 27 d of storage at 4 °C, samples of clarified juice still showed a large population of small cloud particles when measured by diffraction light scattering.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-2621.2002.tb08702.x
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