37 research outputs found
Fresh-cut carrot (cv. Nantes) quality as affected by abiotic stress (heat shock and UV-C irradiation) pre-treatments
Available at Sciverse ScienceDirectAbiotic stresses such as heat shock and UV-C irradiation can be used to induce synthesis of bioactive
compounds and to prevent decay in fresh-cut fruits and vegetables. This study aimed to evaluate the
effects of heat shock and UV-C radiation stress treatments, applied in whole carrots, on the overall
quality of fresh-cut carrot cv. Nantes during storage (5 C). Heat shock (HS, 100 C/45 s) and UV-C
(0.78 0.36 kJ/m2) treated samples had higher phenolic content and exhibited reduced POD activities
during storage when compared to control (Ctr) samples (200 mg/L free chlorine/1 min). All samples
showed reduced carotenoid content considering raw material. Nonetheless, UV samples registered
a three-fold increase in carotenoid content in subsequent storage. Fresh-cut carrot colour showed
a continuous increase in whiteness index (WI) values during storage regardless of treatment without
impairing visual quality. Respiratory metabolism was affected by both abiotic stress treatments since
reduced O2/CO2 rates were found, more significant in HS samples. The decontamination effect was more
expressive in HS samples, where a 2.5 Log10 cfu/g reduction in initial microbial load and reduced
microbial growth were achieve
Productive performance and blood parameters of bulls fed diets containing babassu mesocarp bran and whole or ground corn
Restriction of vitamin A and D in beef cattle finishing diets on feedlot performance and adipose accretion1
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Diets containing low vitamin A and roasted soybeans affect adipose cellularity and muscle fatty acid profile of beef cattle
Effect of vitamin A restriction on carcass characteristics and immune status of beef steers
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Effects of dietary vitamin A concentration of roasted soybean inclusion on marbling, adipose cellularity, and fatty acid composition of beef
A feedlot trial was conducted to determine the effect of dietary vitamin A concentration and roasted soybean (SB) inclusion on carcass characteristics, adipose tissue cellularity, and muscle fatty acid composition. Angus-crossbred steers (n = 168; 295 +/- 1.8 kg) were allotted to 24 pens (7 steers each). Four treatments, in a 2 x 2 factorial arrangement, were investigated: no supplemental vitamin A, no roasted soybeans (NANS); no vitamin A, roasted SB (20% of the diet on a DM basis; NASB); with supplemental (2,700 IU/kg) vitamin A, no roasted SB (WANS); and with supplemental vitamin A, roasted SB (WASB). Diets included high moisture corn, 5% corn silage, 10 to 20% supplement, and 20% roasted SB in the SB treatments on a DM basis. The calculated vitamin A concentration in the basal diet was 0.10) for cattle performance, carcass composition, or muscle fatty acid composition. Low vitamin A diets (NA) did not affect (P > 0.05) ADG, DMI, or G:F. Quality grade tended (P = 0.07) to be greater in NA steers. Marbling scores and the percentage of carcasses grading > or = Choice(-) were 10% greater for NA steers, although these trends were not significant (P = 0.11 and 0.13, respectively). Backfat thickness and yield grade were not affected (P > 0.26) by vitamin A supplementation. Composition of the LM was not affected (P > 0.15) by vitamin A or SB supplementation. Serum retinol at slaughter was 44% lower (P 0.18) by vitamin A or SB treatments. Fatty acid profile of the LM was not affected by vitamin A (P > 0.05), but SB increased (P < 0.05) PUFA (7.88 vs. 4.30 g/100 g). It was concluded that feeding NA tended to increase marbling without affecting back-fat and yield grade. It appeared that NA induced hyperplasia in the i.m. but not in the s.c. fat depot