• Asian-Australasian Journal of Animal Sciences
• /
• 제32권12호
• /
• pp.1933-1941
• /
• 2019

Objective: This study was conducted to evaluate quality characteristics of cured pork loin with natural nitrite source from Swiss chard. Methods: Pork loin was cured in brine and the ratio of water and fermented Swiss chard (FSC) solution in the brine was changed by 4:0 (control), 3:1 (T1), 1:1 (T2), 1:3 (T3), 0:4 (T4), and pickled samples with 0.012% sodium nitrite (PC, positive control) and nitrite free brine (NC, negative control) were considered as the control. Results: The pH values of cured pork loins with FSC were decreased with increasing addition level of FSC. Cooking loss was not significantly different among all treatments. T4 had the lowest value in moisture content and lightness value and the highest value in curing efficiency. The redness value of T4 was not significantly different from that of PC in raw. After cooking, however, it was higher than that of PC. The yellowness value of cured pork loin added with FSC was increased with increasing level of FSC. Volatile basic nitrogen content of cured pork loin added with FSC was higher than PC and NC. Thiobarbituric acid reactive substance value of cured pork loin added with FSC was decreased with increasing FSC level. Residual nitrite level and shear force were increased with increasing FSC level. In the sensory evaluation, sensory score for flavor, off-flavor, chewiness, juiciness, and overall acceptability were not significantly different among all treatments. However, sensory score for color was increased when the concentration of FSC added to pork loin was increased. Conclusion: The FSC solution had a positive effect on redness and lipid oxidation. As shown by the results in protein deterioration and sensory, Swiss chard can replace sodium nitrite as natural curing agent.

• 한국환경농학회지
• /
• 제37권2호
• /
• pp.97-103
• /
• 2018

BACKGROUND: Dissipation of acetamiprid and thiamethoxam in greenhouse grown chard samples was evaluated at 5 intervals including the pre-harvest interval after application. This study was conducted to determine the residue levels, the biological half-lives and dissipation rate of acetamiprid and thiamethoxam in chard under controlled conditions. METHODS AND RESULTS: Acetamiprid and thiamethoxam were applied in accordance with good agricultural practices for chard. Chard samples were collected at 0, 1, 2, 3, 5, 7, 10 and 14 days after application. Quantitaion was performed by HPLC-DAD system with C18 column. Limit of quantification (LOQ) of acetamiprid and thiamethoxam were both 0.02 mg/kg for chard. The recovery of acetamiprid and thiamethoxam were 77.8~107.5% and 94.3~108.6% at two concentration levels. The half-lives of pesticide dissipation in chard for two fields were 11.9 and 8.2 days for acetamiprid and 3.6 and 3.3 days for thiamethoxam respectively. The dissipation rate of acetamiprid and thiamethoxam were estimated according to the statistics method with a 95% confidence. CONCLUSION: Dissipation of acetamiprid and thiamethoxam in chard were determined under greenhouse. The concentration of acetamiprid and thiamethoxam in chards at 0 days after application were below specified by Korean MRL. Dissipation rate constant will be useful to set the pre-harvest residue limit for public health and consumer protection.

• 한국축산식품학회지
• /
• 제37권3호
• /
• pp.418-428
• /
• 2017

In this study, the effects of pre-converted nitrite from Swiss chard powder (PS) on the color stability and shelf-life of cooked pork patties during refrigerated storage for 28 d were investigated. Nitrite was added at a concentration of approximately 120 ppm. Five treatments were formulated as follows: Control (120 ppm nitrite), T1 (2% PS), T2 (2% pre-converted nitrite from celery powder; PC), T3 (1% PS + 60 ppm nitrite), and NC (nitrite-free). The T1 and T3 samples had higher nitrosoheme pigment contents, which were associated with the redness of the samples (p<0.05). T1 resulted in the highest redness value (p<0.05). The redness and yellowness of the cooked pork patties increased with increasing PS levels. The pH of the samples subjected to all treatments decreased with progress of the storage period (p<0.05). The pH of the T1 and T3 samples treated with PS was lower (p<0.05) than that obtained with other treatments, as PS has a lower pH value. The treatments in which PS was added were most effective for reducing the level of thiobarbituric acid reactive substances (TBARS) and the residual nitrite content relative to the control. T1 resulted in the highest flavor, off-flavor, and overall acceptability scores during storage (p<0.05). The total viable bacterial count for all treatments was below 1 Log CFU/g, and E. coli and coliform bacteria were not detected during storage. Therefore, these results suggested that pre-converted nitrite from Swiss chard powder is a potential replacement for nitrite in meat products.

• 동아시아식생활학회지
• /
• 제17권5호
• /
• pp.671-677
• /
• 2007

This study examined the relationship between chlorophyll(Chl) and ascorbic acid(ASA) as an index of freshness for vegetables, when the general consumers purchase several kinds of vegetables at the market. The leaves and fruits of several types of vegetables were divided into top, middle, and basal sections. Chl was determined by a spectrophotometer, and ASA was analyzed by high-performance liquid chromatography. For the vegetable sections, we found that Chl and ASA levels were highest in the top sections, followed by the middle, and were lowest in the basal portions. For the relationship between Chl and ASA in vegetables, there were seven classifications including high Chl(above 80mg/100g of fresh weight) and high ASA(above 80 mg/100 g of fresh weight) for mallow, and kail; the second group had high Chl and low ASA(below 80 mg), such as in spinach, burdock, and perilla leaves; the third group contained medium Chl($40{\sim}80mg$) and medium ASA($40{\sim}80mg$) levels, such as for gonddalbee, angelica, pumpkin leaf and coriander; the fourth group had medium Chl and low ASA levels, as in crown daisy and lettuce; the fifth group contained low Chl(below 40 mg) and high ASA, such as in hot peppers and parsley; the sixth group had low Chl and medium ASA levels, and included broccoli, pak choi, and sweet peppers; finally the seventh group contained low Chl and low ASA levels, as in dropwort, young radishes, shallots, cucumbers and swiss chard.

• 농약과학회지
• /
• 제17권4호
• /
• pp.293-301
• /
• 2013

본 실험은 작물의 농약잔류성 포장시험 결과를 다른 소면적 작물로 외삽 할 수 있는지 알아보기 위하여 온실에서 재배되는 엽채소류를 대상으로 경엽살포 후 작물간 농약잔류 경향을 비교하였다. 배추속에 속하는 겨자채(Brassica juncea L.), 케일(Brassica oleracea L.), 다청채(a kind of pak-choi (Brassica rapa subsp. chinensis L.)), 잎 브로콜리(Brassica oleracea var alboglabra) 4종과 배추속이 아닌 들깻잎(Perilla frutescens Britt.), 상추(Lactuca sativa L.), 적근대(Beta vulgaris L. subsp. vulgaris) 및 적치커리(Cichorium intybus L. var. foliosum Hegi) 4종을 대상으로 하였다. 이들은 온실이나 노지에서 연중 재배되며 일정한 수확기 동안 연속적으로 잎을 따서 수확하는 작물들로서 시금치처럼 포기 형태로 일시에 수확하는 작물들과 구별된다. 무게 대비 엽면적 비율이 58 $cm^2/g$으로 가장 높은 들깻잎에서 imidacloprid 등 7종 농약의 잔류량이 살포 당일부터 5일 후 까지 가장 높았다. 따라서 식품의 일일섭취량 통계에 따른 섭취량이 일정 수준을 차지하면서 시험대상 8작물중 농약 잔류량이 상대적으로 높은 들깻잎을 농약잔류성시험의 대표작물로 선정하여 외삽 적용을 위한 작물 그룹을 제안한다.

• 한국가정과교육학회지
• /
• 제27권3호
• /
• pp.19-34
• /
• 2015

본 연구는 초등학생의 기피 식품 중의 하나인 채소류 섭취에 대한 인식 및 섭취 태도를 평가하고 이에 영향을 미치는 환경적 요인을 분석하고자 강원도 소재 초등학교 학생과 그의 학부모 각 410명을 대상으로 설문 조사를 실시하였으며(총 742부, 학생 391, 학부모 351), 본 연구 결과는 다음과 같다. 식사 시 건강 관심도는 학생 64.3%, 학부모 84.9%가 (매우) 관심 있다고 하여 두 그룹 모두 건강에 대한 관심도가 높았다. 아동 46.6%, 학부모 52.4%가 편식을 한다고 하였고, 편식하는 식품은 대부분 채소류로 버섯, 당근, 마늘, 피망, 파, 김치, 호박이나 콩이었다. 편식 여부는 식사 시 건강고려도(p<0.01), 아동의 건강관심도(p<0.05)에 따라 유의적 차이를 보였다. 편식 아동의 70.9%가 편식 개선 의지를 보였고, 건강에 관심이 많은 경우 편식 개선의지도 높았다(p<0.01). 학교급식에 주로 사용되는 20종 채소류에 대한 인지도는 고추, 깻잎, 브로콜리, 배추, 양상추, 시금치, 양배추, 열무, 무, 오이, 피망, 호박은 90%이상이 들어본 적이 있다고 하였으며, 근대, 비름나물과 아욱은 들어보거나 먹어본 경험이 적은 생소한 채소류인 것으로 나타났다. 배추, 무(62.7%), 오이(62.1%), 깻잎(60.4%), 양상추(58.1%), 시금치(54.5%) 등이 자주 먹는 채소류였다. 각 채소에 대한 선호도를 조사한 결과 양상추, 오이, 배추, 깻잎, 시금치, 무에 대한 선호도가 높았고, 마늘종, 쑥갓, 피망, 고추, 아욱은 선호도 순위가 낮았다. 아동과 학부모의 채소류 선호도 사이에는 유의적인 양의 상관관계가 있어(p<0.01, p<0.001) 학부모의 선호도가 아동의 채소류 선호도에 영향을 주는 것으로 나타났다. 아동이 선호하는 채소류 조리방법은 쌈장, 국과 비빔밥이었고, 소금 간을 이용하는 것보다 고추장 무침을 선호하였다. 향이 강한 채소의 섭취에 대해서는 부정적인 태도를, 맛이 없었던 채소는 다음에도 섭취하지 않는다는 응답이 많아 채소의 향과 맛이 없었던 경험은 아동의 채소류 섭취 태도에 영향 미치는 요인임을 알 수 있었다. 먹어본 적이 없는 채소도 먹으려 한다는 응답이 많았으며, 건강관심도(p<0.05), 식사 시 건강 고려도(p<0.001)와 먹어본 적이 없는 채소의 섭취 태도 사이에는 유의적 상관을 보였다.