نتایج جستجو برای: pectinesterase
تعداد نتایج: 203 فیلتر نتایج به سال:
Nematode-trapping fungi are "carnivorous" and attack their hosts using specialized trapping devices. The morphological development of these traps is the key indicator of their switch from saprophytic to predacious lifestyles. Here, the genome of the nematode-trapping fungus Arthrobotrys oligospora Fres. (ATCC24927) was reported. The genome contains 40.07 Mb assembled sequence with 11,479 predic...
Pectin methyl esterase (PME) (EC 3.1.1.11) catalyzes the hydrolysis of methylester groups of cell wall pectins. We investigated the role of this enzyme in dormancy termination and germination of yellow cedar (Chamaecyparis nootkatensis [D. Don] Spach) seeds. PME activity was not detected in dormant seeds of yellow cedar but was induced and gradually increased during moist chilling; high activit...
In 1960 Albersheim, Neukom, and Deuel (1) reported on an enzyme present in a commercial pectic enzyme preparation (Pectin01 RlO, Rohm and Haas Company, Philadelphia) that degraded the a, 1 + 4-glycokidic bonds in pectin by a trans elimination of the proton on the 5th carbon atom of an anhydromethyl galacturonate unit with the oxygen of the adjacent glycosidic bond. Cleavage of the bonds in pect...
In the wild-type cotton (DP 5690), the cell walls of elongating cotton fibers are bilayered, with the outer layer enriched in de-esterified homogalacturonan (HGA), and an inner layer enriched in xyloglucans and cellulose. This bilayer is conspicuously absent in the cell walls of the ovule epidermal cells and in the fiber of the short fiber mutants Ligon lintless 1 and Ligon lintless 2. The high...
ETCHELLS, J. L., COSTILOW, R. N., AND BELL, T. A. 1952 Identification of yeasts from commercial cucumber fermentations in northern brining areas. Farlowia, 4, 249-264. JANSEN, E. F., AND MACDONNELL, L. R. 1945 Influence of methoxyl content of pectic substances on the action of polygalacturonase. Arch. Biochem., 8, 97-112. JANSEN, E. F., MACDONNELL, L. R., AND JANG, R. 1945 Simultaneous actions ...
The changes in cell wall polysaccharides and selected cell wall-modifying enzymes were studied during the development of green bean (Phaseolus vulgaris L.) pods. An overall increase of cell wall material on a dry-weight basis was observed during pod development. Major changes were detected in the pectic polymers. Young, exponentially growing cell walls contained large amounts of neutral, sugar-...
BACKGROUND During harvest and transportation, processing tomatoes are exposed to elevated temperatures, compression and vibration in the harvester and truck, making them prone to bruising. The objective of this study was to determine how bruising and exposure to high temperatures affect pectin methylesterase (PME) activation and the textural quality of tomato juice. RESULTS Tomatoes were both...
Comparison of the production of pectin methylesterase (PME) by Aspergillus niger from apple pomace in solid-state (SSF) and submerged fermentation (SmF) was made for higher PME production. pH value of 4.0, incubation temperature of 25 °C and incubation period of 96 h were found optimum in both SSF and SmF, while optimum dilution levels were 1:3 and 1:6, respectively. Ammonium sulphate in SSF an...
We are investigating a novel application of a thermally-tolerant plant pectin methylesterase (TTPME) to improve energy efficiency in sugar beet processing. Sucrose diffusion from cossettes occurs in water heated to about 70°C, the optimal temperature for TT-PME activity. Drying pulp is necessary to stabilize it for storage and commercialization as animal feed, but this consumes up to 30% of tot...
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