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Enzymic browning in potatoes

Enzymic browning in potatoes

Enzymic browning in potatoes

... the increased labour costsfor sorting blemished and damaged tubers and the cost ofpreventing browning during processing [10]. Scientists in the food industry are currently investigating innovativeways ... as physical means to prevent enzymic browning, even when using recommended &&non- browning& apos;' commercial varieties of potatoes [10]. In po-tatoes, internal discolouration is of ... to show the enzyme-catalysed reaction resulting in the browning of raw potato. Although several methodsare available for recording enzymic browning in plants,they generally require the use of...
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Internal browning in cold stored pineapples is suppressed by

Internal browning in cold stored pineapples is suppressed by

... controlled internal browning, a chilling injury symptom, in pineapples stored at 10°C forfour weeks. The treatment with 1-MCP also delayed ascorbic acid decline, and arrested the decline in both ... pineapples. © 2001 Elsevier Science B.V. All rights reserved.Keywords:1-Methylcyclopropene; Ananas comosus L.; Ethylene; Internal browning; Chilling injury1. IntroductionInternal browning ... be a basis for testing the effectiveness of 1-MCP in controlling IB in pineapple. Here wereport that 1-MCP strongly reduces the incidenceof IB in pineapple.* Corresponding author. Tel.: +44-118-9318098;...
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Advances in understanding of enzymatic browning in harvested

Advances in understanding of enzymatic browning in harvested

... re-sulting from PPO activity, then accelerate anthocyanidindegradation, resulting in enzymatic browning (Fig. 1).With an increasing research effort on litchi, our under-standing of the enzymatic browning ... HPLC) theanthocyanins as cyanidin-3-rutinoside, cyanidin-3-glu-coside, quercetin-3-rutinoside and quercetin-3-gluco-side. Recently, Zhang, Pang, Yang, Ji, and Jiang (2004),using HPLC-MS, showed ... betterunderstanding of enzymatic browning. Based on im-proved understanding, reliable technological approachesmay be developed to control the browning of the fruitduring storage, trans port and marketing.AcknowledgementsThis...
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Antisense expression of polyphenol oxidase genes inhibits enzymatic browning in potato tubers

Antisense expression of polyphenol oxidase genes inhibits enzymatic browning in potato tubers

... environmentalfactorsinfluenceenzymatic browning in potatoes includingtuber dry matter as wellas availability and levels ofsubstrate3-6.The firststepsin thepathwayleadingto the formation of melaninsinvolvetheoxidation ... resulting index ranges from 0 to 50. Indicesfrom tubers of 50 lines were determined after in vitropropagationand plantinginfieldtrials in Metslawier,northernHolland, in 1992(Fig. 5). Lines ... activity in these tissues. Interestingly, in stolon tipsinitiating tuber formation, PPO transcript was detected in thepoly-A*"RNA from all lines containing patatin promoter constructs (Fig....
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Control  of  enzymatic  browning  in  apple  with  ascorbic  aci

Control of enzymatic browning in apple with ascorbic aci

... protection against browning in Red Deli- cious and Winesap plugs but induced browning in samples stored 6 or more hours (data not shown). As with CINN, in- duced browning by BENZ may be an indication ... surfaces but were ineffective in juice. Ascorbic acid- 6-fatty acid esters showed anti -browning activity in juice. Cinnamate and benzoate inhibited browning in juice but induced browning when applied ... yielding linear curves, sometimes having an initial region of zero slope indicating the absence of browning. “Lag” times corresponding to this region and the changes in L (or a) from the initial...
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Enzymatic browning in apples

Enzymatic browning in apples

... temperature in cov- ered crystallizing dishes to minimize dehydration. L- and a-values (decreasing L and increasing a being associated with browning) were recorded at frequent intervals over ... equally ef- fective in controlling enzymatic browning in apple. MATERL4LS & METHODS WINESAP AND RED DELICIOUS apples were obtained from local food stores in the spring of 1986 and 1987, ... and again after 24 hr and plotted against log time, yielding linear or bilinear curves with an initial region of zero slope. The lag time (time before the onset of browning) corresponding to...
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Enzymatic browning in foods

Enzymatic browning in foods

... Casein hydrolyzate and bovine serumalbumin did not inhibit mushroom or avocadoPPO. Millimolar concentrations of the L-aminoacids, lysine, glycine, histidine, and phenylala-nine (in increasing ... used in the food in- dustry for the inhibition of browning. 115 Use ofthe calcium salt has the added advantage of main-taining the firmness of the pulp tissue by inter-acting with pectin in ... juices, and wines. Browning is more severe when the food has beensubjected to surface damage, which can resultfrom cutting, peeling, comminuting, pureeing,pitting, pulping, or freezing. In uncut...
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Involvement of peroxidase in enzymatic browning

Involvement of peroxidase in enzymatic browning

... enzymatic browning. Keywords: Enzymatic browning; pear; peroxidase; polyphenol oxidaseINTRODUCTION Browning of damaged tissues of fruits and vegetablesduring postharvest handling and processing is ... quinones andconsumed chlorogenic acid in the presence of catalasesuggested than 50 to 60% of the quinones present in reaction mixtures are used by POD, the remaining 40-50% being involved in ... reported in slow processessuch as pineapple internal browning (Teisson, 1972).This involvement remained however questionable fortwo main reasons, i.e. the high affinity of PPO for itsnatural substrate...
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Use of DDGS in Swine Diets

Use of DDGS in Swine Diets

... to feeding corn-soybean meal diets. Feeding DDGS increases GE intake and improves phosphorus utilization during late finishing phases, but also increases N excretion. When diets containing DDGS ... protein source in diets for gestating swine. J. Anim. Sci. 46:674-677. Wahlstrom, R.C., C.S. German, and G.W. Libal. 1970. Corn distillers dried grains with solubles in growing-finishing swine ... protein quality (low lysine and poor amino acid balance) of corn, DDGS is also low in lysine relative to its crude protein content. Threonine is the second limiting amino acid after lysine,...
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