This study was carried out to investigate the effect of the addition of red wine on the color, water activity, hardness, pH, 2-thiobarbituric acid (TBARS) value, volatile basic nitrogen (VBN) content and total plate count of beef jerky during storage at room temperature for 4 weeks. Beef jerky was prepared using three variations: beef jerky containing 50 mL water (T0), beef jerky containing a combination of 25 mL water and 25 mL red wine (T1) and beef jerky containing 50 mL red wine (T2). The lightness ($L^*$) was the lowest at the 4-week storage period, and the $L^*$ value of T1 and T2 were lower than that of T0 (p<0.05). The redness ($a^*$) tended to decrease during storage, with the $a^*$ value of T1 and T2 being higher than that of the T0 (p<0.05). The yellowness ($b^*$) during storage was not changed, and the $b^*$ value was not significantly different among the different samples tested. The water activity decreased during storage and T0, T1 and T2 was 0.57, 0.57 and 0.60 after 4 weeks of storage, respectively(p<0.05). The hardness increased during storage and the hardness of T2 stored for 4 weeks was lower than that of T0 and T1 (p<0.05). The pH was decreased with an increase in storage time (p<0.05). The TBARS value increased during storage and the TBARS value of T1 and T2 stored for 4 weeks was lower than that of T0 (p<0.05). The VBN content increased during storage and T2 stored for 4 weeks showed the lowest (p<0.05). The total plate count tended to increase during storage, and T0 stored for 4 weeks showed the highest (p<0.05).
The goal of this study was to investigate the effects of dietary mugwort on the proximate composition, volatile basic nitrogen (VBN), thiobarbituric acid reactive substance (TBARS) and fatty acid in chicken meats. One hundred sixty broiler chicks (1 d old) were assigned to one or four dietary groups: Control; commercial feed supplemented with 1% mugwort (T1); commercial feed with 3% mugwort (T2) and commercial feed with 5% mugwort (T3). After 42 d, broilers from each group were slaughtered and meat samples were vacuum packaged and stored at $4{\pm}1^{\circ}C$ over a period of 0, 1,2,3, and 4 wk. Chicken breast was not influenced by all treatments in moisture, crude protein and crude fiber, while crude fat was lowered (p<0.05) in chickens fed with the T2 and T3 diets compared to the control and T1 diets. All treatments with mugwort diets tended to have decreased VBN values for chicken breast and thigh compared to control. As storage time increased, VBN was increased for all chickens (p<0.05). No significant differences in TBARS were observed among all treatments at 0 wk. TBARS values were reduced with the T2 and T3 diets and initially increased from 0 through 3 wk, then abruptly decreased at 4 wk. Dietary mugwort supplementation resulted in increased stearic acid (excepted T2) and oleic acid and decreased linoleic acid. Stearic acid in thigh meat was decreased in the T1, T2 and T3, however linoleic acid levels tended to increase with mugwort powder supplementation. It is concluded that dietary mugwort has a positive effect on increasing unsaturated fatty acid contents and decreasing saturated fatty acids.
The purpose of this study was to investigate the association between adolescent smoking and antioxidant vitamins. Subjects were 87 non-smokers and 90 smokers. who were female high school students. Smokers were divided into tow groups by smoking status, 35 light smokers (packyear<1) and 53 heavy smokers(packyear$\geq$1). Dietary intakes were examined through questionnaires and nutrient intakes of vitamin C and A were analyzed by smoking status using Computer Aided Nutritional analysis program for professional (CAN-PRO). Serum vitamin C level was measured by 2,4-dinitrophenylhydrazine method and serum levels of vitamin A and E were measured by HPLC. Erythrocyte lipid peroxide levels was measured by thiobarbituric acid reactive substance (TBARS) method. All data were statistically analyzed by SAS PC package program. The mean vitamin C intakes of non-smokers, light smokers and heavy smokers were 58.2mg/day, 50.1 mg/day 58.1mg/day, respectively. The mean vitamin A intakes of non-smokers, light and heavy smokers were 28.1$\mu\textrm{g}$R.E./day, 278.7$\mu\textrm{g}$R.E./day and 289.6$\mu\textrm{g}$R.E./day, respectively. There was no significant difference in dietary intakes of antioxidant vitamins by smoking status. However, the serum vitamin C level, 11.40mg/l in heavy smokers was 12% lower than that of than that of 12.70mg/l in non-smokers. The serum vitamin A level was not significantly different among the groups. Vitamin E level, 8.79mg/l in heavy smokers was 8% lower than that of 9.53mg/l in non-smokers. There was no significant correlation between the dietary intakes and serum levels of vitamin A and C. The erythrocyte TBARS level, 1.90nmol/ml in light smokers was significantly lower (p<0.05) than 2.71 nmol/ml in heavy smokers or non-smokers. The correlation data showed that the cerythrocyte TBARS level had a significant positive correlation with packyear. Overall results might suggest that cigarette smokers with a longer smoking history need more dietary intakes of vitamin C and E than do non-smokers to reach the same serum level.
This study were carried to investigate to the effects of diet supplemented with pine needle powder on pH, total phenol contents, DPPH (1,1-diphenyl-2-picrylhydrazyl) radical scavenging activity, TBARS (thiobarbituric acid reactive substance), WHC (water holding capacity), shear force, sensory evaluation, meat color, and fatty acid composition of chicken meat. Broiler chicks were fed the corresponding diets containing 0% pine needle powder (Control), 0.3% pine needle powder (T1), 0.6% pine needle powder (T2), or 0.9% pine needle powder (T3) for five weeks. The pH and TBARS was significantly decreased by the supplementation of pine needle powder compared to the control (P<0.05). The total phenol contents and DPPH radical scavenging activity were significantly increased by the supplementation of pine needle powder compared to the control (P<0.05), and T3 showed the most effective (P<0.05) more effective in improving self-life compared to the other treatment groups. The CIE $a^*$ value of treatment groups showed significantly higher value compare to the control, however, CIE $L^*$ values was decreased. In fatty acid composition, the level of oleic acid in chicken meat was significantly (P<0.05) increased by the supplementation of pine needle powder compared with the control group. In conclusion, dietary supplementation of pine needle powder was effective in decreasing pH and TBARS, and increasing total phenol contents and DPPH radical scavenging activity in broiler meats.
Jae-Hoon Choi;Hyun-Mi Cho;Heung-Soo Son;Tae-Woong Kim
Journal of the Korean Society of Food Science and Nutrition
/
v.23
no.3
/
pp.402-408
/
1994
Human plasma low density lipoprotein (LDL) is the major factor of coronary heart disease.But recent studies suggest the normal LDL can be realdily oxidized by oxygen free radicals and not interact with LDL receptors.Lipoprotei particles consist of lipid and protein, and fatty acids are prone to oxidatioin.The fatty acid compositions of LDL from Koreans was compared with that of Westerners.From the results, the raio of unsaturated fatty acids of korean and Westerner approximately 30 and 70%, respectively.which means Westerners are more labile in the lipid oxidation of LDL than Koreams.Normal LDL was incubated with $CuSO_4$ in PBS to lead for the peroxidation of LDL, and it was tested by the detection of TBARS and free radicals.Then, ascorbate, ${\alpha}-tocopherol$ and hyaluronic acid were found to have effects of antioxidants on LDL oxidation.The amount of free radical increased as the extent of oxidation increased.The time course of free radical formation was similar to TBARS.Therefore, determination of free radical by Luminometer was much more convenient than that of TBARS.
Journal of the Korean Society of Food Science and Nutrition
/
v.31
no.1
/
pp.87-91
/
2002
This study was designed to investigate the effects of Hijikia fusiforme (Harvey) Okamura ethanol extract on the ethanol-induced hepatotoxicity of rat administered orally experimental diets for 6 weeks. Sprague-Dawley rats weighing about 100 g were divided into 4 groups; normal group (NOR), ethanol (35% ethanol 10 mL/kg b.w/day) treated group (CON), ethanol and Hijikia fusiforme ethanol extract 200 mg/kg (HE1) and 400 mg/kg (HE2) concomitantly treated group, respectively. Each group was examined for the growth rate, feed efficiency ratio (FER), activities of antioxidative enzymes and contents of TBARS and glutathione. Hijikia fusiforme ethanol extract showed increasing effects of the growth rate by 43%, and FER was gradually increased by Hijikia fusiforme ethanol extract treatment, compard with ethanol treatment. Ethanol elevated the activities of superoxide dismutase, catalase and glutathione peroxidase of rat liver markedly as compared to normal group, but those activities were significantly decreased in Hijikia fusiforme ethanol extract treatment by 56%, 38% and 25%, respectively. Xanthine oxidase activity elevated by ethanol was not affected by Hijikia fusiforme ethanol extract. The content of TBARS increased by ethanol treatment was signigicantly decreased in HE2, and the glutathione content depleted by ethanol treatment was increased by Hijikia fusiforme ethanol extract administration adjacent to normal level. These results suggest that Hijikia fusiforme ethanol extract is believed to be a possible protective effect for the ethanol-induced hepatotoxicity of rat liver.
In this study, four different oils containing either CLA, GLA, GLA+Carnitine or corn oil (control) were supplemented to finishing pigs (average 70.8 kg initial BW) diet for 28 d of feeding period. To evaluate the values of the dietary fatty acids, especially in view of sensory and nutritional characteristics of pork; pig performances, carcass characteristics, serum cholesterol, neutrophil phagocytosis, TBARS, electronic nose flavor and fatty acids profile of pork were measured. There were no differences in daily gain and nutrients digestion among treatments, but daily feed intake of CLA enriched diet was lower (P<0.05) than that of other diets. There were no differences in backfat thickness, dressing percentage and carcass grade among pigs fed diets supplemented with different oils. Serum total cholesterol showed a tendency to be lowered in pigs fed GLA enriched diet. TBARS values during storage of pork were higher in belly from pigs fed control diet whereas the values of belly from pigs fed GLA+Carnitine diet were lower than others. However, difference in TBARS was not remarkable in adipose tissue and 4 weeks extended storage regardless of pork parts. Proportion of saturated fatty acids such as C16:0 and C18:0 were higher (P<0.05) in pork loin and thin skirt from pigs fed CLA enriched diet compared to those from other diets. There were no differences in fatty acids profiles of belly and adipose tissue. CLA accumulation in pork was increased by the dietary CLA supplementation and this could be also confirmed by a slight de novo synthesis of CLA in pork from pigs fed CLA free diets. GLA was selectively accumulated to pork adipose tissue and loin from pigs fed GLA enriched diets. There was no accumulation of GLA when GLA was not supplemented, indicating no de novo synthesis of GLA. Phagocytic activity was the highest (p<0.05) in neutrophil of pigs fed GLA+Carnitine supplemented diet, then, followed by pigs fed GLA supplemented diet. There was no difference in phagocytosis between control and CLA treatment although the phagocytosis was numerically lowest in pig fed CLA enriched diet. There were distinct differences in electronic nose flavor pattern among treatments regardless of the parts. This study showed that dietary supplementation of functional fatty acids like CLA or GLA was able to result in characteristic differences in feed intake, TBARS, fatty acids profile and flavor of pork, serum cholesterol regulation and neutrophil phagocytosis.
The objective of this study was to determine the antioxidant and antimicrobial effects of garlic juice and onion juice in emulsified sausage during cold storage. The sausages were into five groups: control, 1% garlic juice (T1), 3% garlic juice (T2), 1% onion juice (T3), and 3% onion juice (T4). Each sausage type was tested in triplicate and assigned to one of four storage periods: 0, 7, 14 and 21 days. As storage time increased, the presence of garlic juice and onion juice resulted in decreased pH, residual nitrite value, and increased peroxide value, TBARS (thiobarbituric acid reactive substance) values, and total plate counts. The pH value, peroxide value, TBARS, residual nitrite and total plate counts were significantly decreased by the addition of garlic and onion juice relative to the control (p<0.05). Especially, T2 was significantly (p<0.05) more effective in delaying lipid oxidation compared to the other treatment groups. However, no significant difference (p<0.05) was found in total plate counts among all the formulations on day 0. Also, the use of garlic juice resulted in much better antioxidant and antimicrobial effects than the use of onion juice and the control. In conclusion, this study demonstrates that the addition of 3% garlic juice (T2) to emulsified sausages tended to improve antioxidative and antimicrobial effects during storage relative to the other treatment groups.
This study was conducted to investigate the influence of dietary $\omega$-fatty acids on fatty acids composition and storage characteristics in meat samples of spent hens. Spent hens were randomly assigned to one of the four dietary treatments : 1) Control (commercial feed), 2) T1 (commercial feed supplemented with 10% olive oil, 3) T2 (commercial feed with 10% canola oil), and 4) T3 (commercial feed with 10% sardine oil). They were fed one of the experimental diets for three weeks and slaughtered. The meat samples were stored at 4 ${\pm}$ 1 ˚C The storage characteristics and fatty acid contents were analyzed for meat samples stored over a period of 1, 3, 5, 7 and 9 days. The pH of all treatments significantly increased during the storage periods(P<0.05). The per-oxide values (POV) of all treatments were significantly increased up to 5 days ; after that the POV decreased significantly (P<0.05). The POV of treated groups were significantly higher than those of the Control in the thigh meat(P<0.05). The TBARS showed the highest POV among all treatments. Although the breast meat tended to he lower in POV than the thigh meat, no significant difference was detected between the two meats. The TBARS(thiobarbituric acid reactive substances) of all treatments were significantly increased as the storage period extended(P<0.05). After 3 days, the TB ARS of oil-treated groups were aignificantly higher than that of the Control (P<0.05). The T3 showed the highest TBARS among all treatments (P<0.05). The TBARS of the breast meat was lower than that of the thigh, but no statistical difference was found be- tween them. The unsaturated fatty acid content of the breast and thigh meats in all treatments were slightly decreased as the storage period extended. The oleic acid was higher in Ti, and the linoleic acid and linolenic acid were higher in T2 than the other treatments. The eicosapentaenoic acid and docosahexaenoic acid were higher in T3 than the other treatments. The unsaturated fatty acid contents of the breast meat were slightly lower than those of the thigh meat. The n-6 fatty acid contents of the breast and thigh meats were slightly increased as the storage periods ex-tended. The n-3 fatty acid content of T3 was the highest among all treatments. The n-6 fatty acid content of breast meat was lower than that of thigh meat. The n-6 fatty acid content of the breast meat was slightly lower than that of the thigh meat.
Journal of the Korean Society of Food Science and Nutrition
/
v.33
no.8
/
pp.1337-1342
/
2004
To improve the quality of Gulbi, 10% garlic juice (GJ), 10% onion juice (OJ), and 10% garlic and onion juice mixture (GOJ) were added to the brine solution as a wet-salting method. The changes of total volatile basic nitrogen (TVB-N) and trimethyl amine (TMA) production, thiobarbituric acid reactive substance (TBARS) value, and total microbial numbers in Gulbi were analyzed during storage at room temperature for 12 days. The group treated with 10% GOJ showed the lowest values of 88.2 mg/l00 g in TVB-N, 14.13 mg/l00 g in TMA, and 3.1 $\mu$mol/kg in TBARS. The fatty acid profile of Gulbi was analyzed on 5, 15, and 30 days to investigate the effect of GOJ treatment. The group treated with GOJ showed higher C22:6 (9.91%) and C20:5 (4.25%) contents than control (7.37% and 3.71%, respectively), but had lower C18:1 (24.44%) content. The saturated fatty acid content in Gulbi was 32∼35% and the C16:0 (21∼23%) was predominant in it. Oleic acid was major unsaturated fatty acid in Gulbi. The contents of polyunsaturated fatty acids (C18:3, C20:5, C22:6) were decreased after 30 days but increased the saturated fatty acid (C16:0) and monoenes (C16:1 and C18:1). The Gulbi treated with GOJ by brine salting method showed higher DHA and EPA (9.91% and 4.25%, respectively) contents than the control group.
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