2-Thiobarbituric acid reactive

Secondary oxidation products oxidation indices, 656, 665-72 acid value, 672 anisidine value, 656, 666 carbonyl compounds, 656, 669-71 conjugated dienes value, 671-2 thiobarbituric acid reactive substances, 656, 666-9... 

TBA, 2-thiobarbituric acid reactive substances, mg MDA/kg sample CBB, cooked beef/brothy, all sensory values are mean intensity scores BM, beefy/meaty BRO, brothy BRC, browned/caramel SWT, sweet PTY, painty CBD, cardboardy SUR, sour BTR, bitter. 

A 12-fold increase in plasma epicatechin concentration from 22 to 257 nmol/L was reported by Rein et al [105] after consumption of 80 g semisweet (procyanidin rich) chocolate within 2 h after ingestion. The total antioxidant capacity of plasma increases of 31% within the same time, and plasma 2-thiobarbituric acid reactive substances decreased up to 40%. These data support that consumption of chocolate increases plasma epicatechin concentrations and decreases plasma baseline oxidation products. These results have been confirmed in another study by Wang et al [106]. 

Wang, C., Zhu, L., and Brewer, M.S. 1997. Comparison of 2-thiobarbituric acid reactive substances determination methods in various types of frozen, fresh meat. J. Food Lipids 4 87-96. 

Tangerine oil. see Citrus Orange Tannins, structure of. see also Polyphenolics Taste, see Flavor analysis TBA. see 2-Thiobarbituric acid TBARS. see 2-Thiobarbituric acid reactive substances... 

Thiobarbituric acid reactive substances (TBARS), determination in lipids, 547-564... 

Stapelfeldt, H., Nielsen, B.R., Skibsted, L.H. 1997b. Towards use of electron spin resonance spectrometry in quality control of milk powder. Correlation between sensory score of instant whole milk powders and concentration of free radicals and 2-thiobarbituric acid reactive substances. Milchwissenschaft. 52, 682-685. 

Rao GS, Pandya KP. 1989. Release of 2-thiobarbituric acid reactive products from glutamate or deoxyribonucleic acid by 1,2,4-benzenetriol or hydroquinone in the presence of copper ions. Toxicology 59 59-65. 

Change of mass, peroxide value or hydroperoxides, conjugated dienes, 2-thiobarbituric acid reactive substances, anisidine value, formation of hexanal, ethane, or pentane... 

Shelf Storage Test The test material is stored under similar conditions as in retail and is evaluated for the effectiveness of antioxidants in prolonging the premium quality of the product. Periodic evaluation of the hpid oxidation products (primary or secondary) by chemical tests (e.g., peroxide value, conjugated diene value, 2-thiobarbituric acid reactive substances, hexanal content) or sensory evaluation will be used to find out the onset of oxidation. The main drawback of this kind of evaluation is the time taken therefore, rapid evaluation or accelerated methods are often preferred (19, 51). 

Halliwell et al. (55) have described a model that uses hydroxyl radicals generated from Fenton reaction to degrade 2-deoxy-D-ribose. The decomposed products of deoxyribose are 2-thiobarbituric acid-reactive substances (TEARS). If the antioxidant present in the system scavenges hydroxyl radicals generated, deoxyribose is protected and the amount of TEARS produced is less. 

Thiobarbituric acid reactive substances Olive oil UV-Vis 0.4-10 x 10 4 mol L-1 1800 Zone trapping inside 10 parallel heated reactors [153]... 

Thiobarbituric acid reactive substances Foods UV-Vis 1—10 irmol L-1 1200 Long incubation time obtained with a sampling — delay unit with 8 hanging reactors [154]... 

S.S. Jorgensen, G. Sorensen, A combined sampling and delay unit for flow injection analysis. The automated determination of 2-thiobarbituric acid reactive substances in foods, Anal. Chim. Acta 322 (1996) 69. 

Measurement of Hydroperoxides and 2-Thiobarbituric Acid Reactive Substances (TEARS)... 

Figure 1. Effects of papain and actinase E hydrolysate concentration on antioxidant activity as shown by relative changes in the 2-thiobarbituric acid reactive substances (TEARS).

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