• Asian-Australasian Journal of Animal Sciences
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• 제30권8호
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• pp.1168-1174
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• 2017

Objective: The aim of the study was to evaluate the effects of different nitrate levels (150, 300, 450, and 600 ppm $KNO_3$) on the volatile compounds and some other properties of pastırma. Methods: Pastırma samples were produced under the controlled condition and analyses of volatile compounds, and thiobarbituric acid reactive substances (TBARS) as an indicator of lipid oxidation, non-protein nitrogenous matter content as an indicator of proteolysis, color and residual nitrite were carried out on the final product. The profile of volatile compounds of pastırma samples was analyzed by gas chromatography/mass spectrometry using a solid phase microextraction. Results: Nitrate level had a significant effect on pH value (p<0.05) and a very significant effect on TBARS value (p<0.01). No significant differences were determined in terms of $a_w$ value, non-protein nitrogenous substance content, color and residual nitrite between pastırma groups produced by using different nitrate levels. Nitrate level had a significant (p<0.05) or a very significant (p<0.01) effect on some volatile compounds. It was determined that the amounts and counts of volatile compounds were lower in the 450 and especially 600 ppm nitrate levels than 150 and 300 ppm nitrate levels (p<0.05). While the use of 600 ppm nitrate did not cause an increase in residual nitrite levels, the use of 150 ppm nitrate did not negatively affect the color of pastırma. However, the levels of volatile compounds decreased with an increasing level of nitrate. Conclusion: The use of 600 ppm nitrate is not a risk in terms of residual nitrite in pastırma produced under controlled condition, however, this level is not suitable due to decrease in the amount of volatile compounds.

• 한국식품영양학회지
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• 제24권3호
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• pp.306-311
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• 2011

본 연구에서는 쇠비름 추출물의 항산화 효과 및 위궤양 유발 병원균으로 잘 알려진 Helicobacter pylori에 대한 항균 효과를 알아보고자 하였다. 쇠비름의 유기용매 추출물의 항산화 효과는 총 페놀 함량, 전자공여능, SOD 유사활성, TBARS 등을 통하여 검증하였다. 쇠비름의 총 페놀 함량은 약탕기 추출물에서 72.2 mg%로 가장 높게 나타났고, 전자공여능은 ethyl acetate 분획물이 91.8%와 methanol 분획물이 90.6%로 나타났다. SOD 유사활성은 2.5 mg/$m{\ell}$의 농도에서 ethyl acetate 분획물 17.4%와 petroleum ether 분획물 16.4%로 높게 나타났다. 쇠비름의 TBARS에 의한 항산화 효과는 유의적으로 나타나지 않았다. Paper disc 법에 의한 Helicobacter pylori 항균 활성의 경우, 쇠비름 추출물의 농도가 증가할수록 inhibition zone 크기가 증가하였고, 쇠비름의 petroleum ether 분획물 10,000 ppm 농도에서 가장 큰 활성이 나타났다.

• 한국축산식품학회지
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• 제40권3호
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• pp.311-322
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• 2020

This study was undertaken to evaluate the impact of Chinese cinnamon powder (w/w), at the levels of 0.5%, 1.5%, and 2.5% and control (without additive) on ground lamb meat quality. The samples were stored at 4℃ and examined for pH, color, lipid oxidation (thiobarbituric acid reactive substances) and total viable counts (TVC). The results demonstrated that pH values were declined with the increase of Chinese cinnamon levels compared to control group. The L* values throughout the storage were significantly higher (p<0.05) in the control group than in other treatment groups, while a* values were decreased with the increase of Chinese cinnamon levels. The addition of Chinese cinnamon powder strongly inhibited (p<0.05) thiobarbituric acid reactive substances (TBARS) and TVC in all treated samples. It can be concluded that Chinese cinnamon powder in lower concentration 0.5% has the ability to maintain the quality of ground lamb in comparison with other treated samples.

• 한국식품조리과학회지
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• 제30권4호
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• pp.369-377
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• 2014

Obesity increases oxidative stress, which could contribute to the development of insulin resistance and hyperglycemia. The purpose of this study was to investigate the hypoglycemic and antioxidant effect of sanchae-namul (SN) in mice with diet-induced obesity. Five-week-old male C57BL/6J mice were fed a basal or high-fat and high-sucrose (HFHS) diet with or without 3% freeze-dried SN powder composed of chamnamul, daraesoon, miyeokchwi, bangpung namul, and samnamul for 12 weeks after a 1-week adaptation. After sacrifice, serum glucose and insulin were measured and the homeostasis model assessment for insulin resistance (HOMA-IR) was determined as well. Hepatic lipid peroxidation, glutathione (GSH), and activities of the antioxidant enzymes were determined. SN given at 3% of the total diet did not significantly influence body weight and food intake in mice fed the HFHS diet. Serum glucose and insulin levels, as well as HOMA-IR values, were significantly lower in the SN group than those in the HFHS group. Thiobarbituric acid reactive substances (TBARS) levels in the liver were decreased significantly in the SN group compared with those in the HFHS group. SN significantly increased the GSH levels and the activities of superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GSH-Px) in the liver compared with those in the HFHS group. Overall, these findings suggest that SN may be useful in alleviating insulin resistance and hyperglycemia in mice fed HFHS diet; further, the improvement of insulin resistance could partly occur by reducing the oxidative stress.

• 한국식품과학회지
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• 제32권5호
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• pp.1186-1190
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• 2000

솔잎의 지질저하효과와 항산화능을 알아보기 위하여 콜레스테롤을 급여한 흰쥐에 솔잎분말을 7주간 급여한 후 혈장 및 간장의 지질구성과 간장내 TBARS량 및 glutathione peroxidase의 활성치를 비교, 검토했다. 그 결과, 혈장 총콜레스테롤량은 솔잎분말처리에 의해 하락(P<0.05)하는 경향을 보였으나 HDL콜레스테롤량은 처리군간에 유의한 차이를 나타내지 않았다(P>0.05). 간장내 총 콜레스테롤량은 9.47 mg/g에서 9.85 mg/g의 범위를 유지하였으며, 처리군간에 유의한 차이를 나타내지 않았다(P>0.05). 혈장 TBARS량은 전 처리군에서 23.15 nmol/ml에서 35.38 nmol/ml의 변동범위를 보였으며, 솔잎분말처리에 의해 하락하는 경향을 나타냈다. (P<0.05). 간장내 TBARS량은 콜레스테롤 급여에 의해 증가하였으나(P<0.05), 솔잎분말처리에 의해 하락하는 (P<0.05) 경향을 보여주었다. 간장 glutathione peroxidase의 활성치는 처리군간에 유의한 차이를 나타내지 않았다(P>0.05).

• The Korean Journal of Physiology and Pharmacology
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• 제7권1호
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• pp.39-45
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• 2003

Reactive oxygen species (ROS) have been suggested to be contributory factors in complications of diabetes mellitus. In the present study, we investigated the generation of superoxide, the lipid peroxide level measured as thiobarbituric acid reactive substances, the vasorelaxation of isolated thoracic aorta and the iNOS expression in kidney of streptozotocin induced diabetic rats. Sprague Dawley rats were divided into four groups: control, ascorbate (400 mg/kg rat weight daily in drinking water), diabetic (single dose of 50 mg of STZ/kg i.p.) and diabetic simultaneously fed with ascorbate for 12 wk. Rats in groups were studied at tri-weekly intervals (0 to 12 wk). Diabetic rats were evaluated periodically with changes of plasma glucose levels and body weight. The ascorbate supplimentation attenuated the development of hyperglycemia and weight loss induced by STZ injection in rats. In the present experimental condition, the ascorbate supplimentation had no significant effect on plasma glucose levels and changes in body weight of normal rate. The superoxide generation, formation of thiobarbituric acid reactive substance and iNOS expression in kidney were significantly increased in STZ-treated rats that were decreased by ascorbate supplimentation. The ascorbate supplimentation had no effect on vasorelaxation of isolated thoracic aorta. These results indicate that ascorbate supplimentation may exert an inhibitory effect on STZ-induced oxidative tissue damage through protection of pancreatic islet cells by scavanging reactive oxygen species. The ascorbate supplimentation may possibly attenuate the renal complication of diabetes mellitus.

• International journal of advanced smart convergence
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• 제8권2호
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• pp.68-76
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• 2019

In this study, we propose a squid jeotgal, Korean fermented seafood, supplement with different soy isoflavones supplements, followed by fermentation for different time intervals at $4^{\circ}C$ to increase the antioxidant activity and improve the food value. In the first month, fermented jeotgals with at lowconcentration ($2mg\;g^{-1}$) of added soy isoflavones showed a significant increase in the activity of up to 55%, whereas, at high concentration ($10mg\;g^{-1}$), the activity almost doubled compared to that of the sample without isoflavones. Moreover, the squid enriched with isoflavones also exhibited significantly decreased total volatile base nitrogen, thiobarbituric acid reactive substances, and biogenic amines, indicative of higher inhibition of the formation of these substances. The changes in the microbial profile were also evaluated. This use of soy isoflavanones as an additive could aid in improving the nutritional value of fermented seafood to reduce the incidence of age-related and chronic disorders.

• Preventive Nutrition and Food Science
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• 제18권1호
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• pp.38-44
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• 2013

The protective effect of Polyopes lancifolia extract on high glucose-induced oxidative stress was investigated using human umbilical vein endothelial cells (HUVECs). High concentration of glucose (30 mM) treatment induced HUVECs cell death, but Polyopes lancifolia extract, at concentrations of 25, 50, and $100{\mu}g/mL$, protected cells from high glucose-induced damage. Furthermore, thiobarbituric acid reactive substances, intracellular reactive oxygen species, and nitric oxide levels increased by high glucose treatment were effectively decreased by treatment with Polyopes lancifolia extract in a dose-dependent manner. Also, Polyopes lancifolia extract treatment reduced the overexpressions of inducible nitric oxide synthase, cyclooxygenase-2, and nuclear factor-kappa B proteins activation that was induced by high glucose in HUVECs. These results indicate that Polyopes lancifolia extract is a potential therapeutic material that will reduce the damage caused by high glucose-induced-oxidative stress associated with diabetes.

• Natural Product Sciences
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• 제13권4호
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• pp.369-372
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• 2007

Oxidative stress induced by reactive oxygen species (ROS) has been suggested to be the cause of various degenerative diseases as well as aging. To evaluate the antioxidant potential of stilbenes, we have investigated the cytoprotective effect of 10 stilbenes derived from plants on the oxidative stress induced by tertiary butyl hydroperoxide (t-BuOOH). Of the stilbenes tested, piceatannol (3) showed the most potent activity, which was further investigated using an animal model. When 3 (30 or 10 mg/kg) was topically administered prior to UVB irradiation, the amount of the thiobarbituric acid reactive substances (TBARS) was significantly reduced compared to that of the control (vehicle). Our findings suggest that piceatannol is capable of protecting cells and tissues from oxidative stress.

• 한국식품저장유통학회지
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• 제24권6호
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• pp.786-794
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• 2017

본 연구에서는 식품으로서 활용범위가 점차 증가되고 있는 고들빼기 식품의 품질에 영향을 미칠 수 있는 여러 화학 성분과 기호성에 관계되는 특수성분을 조사하기 위하여 10월(A)과 12월(B) 2회에 걸쳐 채취시기별로 나누어 분석하였으며, 고들빼기에 함유된 항산화물질을 분석하여 가공식품으로 정착시키는데 필요한 기초 자료를 얻고자 하였다. 고들빼기의 채취 시기별 일반성분의 변화를 조사한 결과, 잎과 뿌리에서 채취 시기가 경과할수록 수분 함량과 조지방 함량은 공통적으로 감소하였으나, 섬유질, 단백질, 가용성무질소물 및 회분 함량은 증가하는 경향을 나타냈다. 무기질은 채취 시기가 경과할수록 잎의 Mg과 Na를 제외하고는 모든 시료에서 공통적으로 증가하는 경향이었다. Vit. C와 Niacin은 채취 시기가 경과할수록 잎과 뿌리 모두에서 공통적으로 감소하는 경향이었으나, Vit. $B_1$, $B_2$는 소량 증가하는 경향을 보였다. 고들빼기 잎과 뿌리의 주된 유기산은 구연산, 사과산 및 주석산이 검출되었고, 시기별로 성분함량의 차이는 보이지 않았다. 주요 구성아미노산은 잎과 뿌리 모두에서 isoleucine과 leucine이었고, 채취시기가 늦을수록 구성아미노산 함량은 증가하였다. 고들빼기의 잎과 뿌리에 함유된 유리당은 fructose, glucose, sucrose, maltose 등 4개의 당이 확인되었고 총 유리당 함량은 채취 시기가 늦을수록 증가하였다. Phenol화합물은 arbutin, catechin, chlorogenic acid, p-coumaric acid 등 4개의 성분이 확인 되었으며, 잎보다 뿌리 함량이 높은 것으로 나타났으며, 채취시기가 늦을수록 그 함량이 증가하는 것으로 나타났다. 고들빼기 항산화력은 잎보다 뿌리의 항산화력이 더 강한 것으로 나타났으며, 채취 시기가 늦을 수 록 더 강한 것으로 나타났다.