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Clarification of juice by thermolabile Valencia pectinmethylesterase is accelerated by cations

Identifieur interne : 002C77 ( Main/Exploration ); précédent : 002C76; suivant : 002C78

Clarification of juice by thermolabile Valencia pectinmethylesterase is accelerated by cations

Auteurs : L. Wicker [États-Unis] ; J. L. Ackerley [États-Unis] ; M. Corredig [États-Unis]

Source :

Journal of agricultural and food chemistry : (Print) [ 0021-8561 ] ; 2002.

RBID : Pascal:02-0444079

Descripteurs français

Pascal (Inist)
- Procédé fabrication, Clarification, Jus fruit, Jus d'orange, Pectinesterase, Activité enzymatique, Dimension particule, Dispersion colloïdale, Citrus sinensis, Calcium, Strontium, Pectine.
Wicri :
- topic : Calcium.

English descriptors

KwdEn :
- Calcium, Citrus sinensis, Clarifying, Colloidal dispersion, Enzymatic activity, Fruit juice, Manufacturing process, Orange juice, Particle size, Pectin, Pectinesterase, Strontium.

Abstract

Pectinmethylesterase (PME) was isolated from Valencia orange pulp and added to reconstituted juice at 1.2 units/mL of juice in the presence or absence of cations at 4.2 or 16.7 mM. The percent transmittance (%T) of control juices with no added PME or cation did not clarify. The %T of juices with added PME and added cation was 45-55% by the second day. Increases in the average particle size was observed with PME- or cation-added juices and preceded increases in %T. Most likely, cations displaced PME from an inactive pectin substrate complex and increased clarification. PME, in the absence of cations, increased particle size but did not affect %T, suggesting a direct interaction of PME with cloud particles.

Affiliations:

États-Unis

Links toward previous steps (curation, corpus...)

to stream PascalFrancis, to step Corpus: 000817
to stream PascalFrancis, to step Curation: 000187
to stream PascalFrancis, to step Checkpoint: 000817
to stream Main, to step Merge: 002E56
to stream Main, to step Curation: 002C77

Le document en format XML

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<front><div type="abstract" xml:lang="en">Pectinmethylesterase (PME) was isolated from Valencia orange pulp and added to reconstituted juice at 1.2 units/mL of juice in the presence or absence of cations at 4.2 or 16.7 mM. The percent transmittance (%T) of control juices with no added PME or cation did not clarify. The %T of juices with added PME and added cation was 45-55% by the second day. Increases in the average particle size was observed with PME- or cation-added juices and preceded increases in %T. Most likely, cations displaced PME from an inactive pectin substrate complex and increased clarification. PME, in the absence of cations, increased particle size but did not affect %T, suggesting a direct interaction of PME with cloud particles.</div>
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Clarification of juice by thermolabile Valencia pectinmethylesterase is accelerated by cations

Clarification of juice by thermolabile Valencia pectinmethylesterase is accelerated by cations

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri