• 한국식품위생안전성학회지
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• 제36권5호
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• pp.376-381
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• 2021

Red beet roots (Beta vulgaris L.)는 천연색소로 붉은 색계열의 betacyanins은 75-95%의 betanine와 이성질체인 isobetanine 15-45%으로 존재한다. 본 연구는 비트레드를 사용한 식품에 대해 HPLC-DAD를 이용하여 지표성분인 betanine 및 isobetanine에 대해 분석법을 확립하였으며, 유효성 검증을 위해 직선성, 검출한계, 정량한계, 정확성, 정밀성, 측정불확도를 측정하였다. 캔디류, 빙과류, 코코아 가공품의 matrix에 적용하여 matrix matched calibration법을 사용하였으며 R²이 0.9998 이상으로 높은 직선성을 보였다. 검출한계와 정량한계는 각각 0.16-0.32 mg/L, 0.48-0.97 mg/L으로 확인되었다. 분석법의 정확성 및 정밀성을 검증하기 위해 intra-day 및 inter-day 반복 실험 결과, 회수율은 96.0-103.1 %, 100.0-102.2 %이였으며, RSD는 0.5-3.3 %, 0.9-3.8 %로 산출되었다. 측정불확도는 매트릭스 및 측정 농도에 따라 1.71-12.43%로 평가되었다. 또한, 확립된 분석법의 적용성 검토를 위해서 비트레드 색소를 사용한 가공식품 26종을 분석한 결과, betanine과 isobetanine을 정량 할 수 있었다 (8.4-3,823.4 mg/kg).

• 한국식품영양과학회지
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• 제31권2호
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• pp.246-250
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• 2002

감마선 조사가 왕겨, 미강, 맥강의 항산화능에 미치는 영향을 조사하기 위하여 4.2 kGy/h의 속도로 각각 5, 10, 15, 20 kGy를 조산한 후, 메탄올 추출물을 제조하여 항산화능의 변화를 측정하였다. 감마선을 조사하지 않은 시료의 총 페놀함량을 측정한 결과, 왕겨가 0.873 mM, 미강이 0.643 mM, 맥강이 0.377 mM로 측정되었으며, 감마선 조사에 따른 총 페놀 함량은 조사선량에 상관없이 일정하게 유지되었다. 전자공여능의 측정결과 감마선을 조사하지 않은 왕겨, 미강, 맥강에서 모두 비슷한 활성을 보였으며, 감마선을 조사한 경우에도 모든 시료에서 조사선량에 따른 유의적인 변화를 나타내지 않았다. TBARS분석에서는 감마선을 조사하지 않은 왕겨와 미강 추출물이 맥강 추출물보다 지질 과산화 억제력이 높았으며, 감마선 조사시에도 왕겨와 미강은 활성이 유지 또는 보유되었으나 맥강은 조사선량이 높을수록 지질의 산화 억제력이 상당히 감소되었다. 따라서 왕겨, 미강, 맥강의 페놀성분과 전자공여능에 관여하는 성분이 감마선에 매우 안정하며, 지질 과산화 억제능에 관여하는 성분은 왕겨와 미강의 경우에는 감마선에 안정하지만 맥강의 경우 불안정하였다.

• 한국축산식품학회지
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• 제38권6호
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• pp.1237-1245
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• 2018

In this study, the contamination levels of hygienic indicators and foodborne pathogens in retail meat products were investigated in relation to the various market factors including processing temperature, processing area, and market type. Ground beef samples (n=80) were purchased from 40 meat markets and investigated for microbiological quality. Beefs processed below $20^{\circ}C$ had significantly lower numbers of total coliforms (TC) than these processed over $20^{\circ}C$ (2.01 vs. 2.79 log CFU/g; p<0.05). Interestingly, separation of processing area did not affect the contamination levels. Remarkably, the contamination levels of hygienic indicator differ among market types, indicating that not only processing condition but distribution structure that is directly related with storage period could affect the final microbiological loads of the meat products. In addition, the prevalences of Listeria monocytogenes (a psychrotroph), Enterococcus faecium, and Enterococcus faecalis were 7.5% (6/80), 10.0% (8/80), and 20.0% (16/80), respectively, which is irrelevant to market factors except meat products from wholesale markets where no L. monocytogenes were found among 30 samples. The results of this study indicate that the contamination level of hygiene indicator and foodborne pathogens in retail beef is more related with processing temperature and storage period than other environmental factors.

• 한국축산식품학회지
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• 제41권2호
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• pp.173-184
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• 2021

Clean labeling is emerging as an important issue in the food industry, particularly for meat products that contain many food additives. Among synthetic additives, nitrite is the most important additive in the meat processing industry and is related to the development of cured color and flavor, inhibition of oxidation, and control of microbial growth in processed meat products. As an alternative to synthetic nitrite, preconverted nitrite from natural microorganisms has been investigated, and the applications of pre-converted nitrite have been reported. Natural nitrate sources mainly include fruits and vegetables with high nitrate content. Celery juice or powder form have been used widely in various studies. Many types of commercial starter cultures have been developed. S. carnosus is used as a critical nitrate reducing microorganism and lactic acid bacteria or other Staphylococcus species also were used. Pre-converted nitrite has also been compared with synthetic nitrite and studies have been aimed at improving utilization by exploiting the strengths (positive consumer attitude and decreased residual nitrite content) and limiting the weaknesses (remained carcinogenic risk) of pre-converted nitrite. Moreover, as concerns regarding the use of synthetic nitrites increased, research was conducted to meet consumer demands for the use of natural nitrite from raw materials. In this report, we review and discuss various studies in which synthetic nitrite was replaced with natural materials and evaluate pre-converted nitrite technology as a natural curing approach from a clean label perspective in the manufacturing of processed meat products.

• Journal of Dairy Science and Biotechnology
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• 제37권2호
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• pp.83-93
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• 2019

Food spoilage by fungi is responsible for considerable food waste and economical losses. Among the food products, fermented dairy products are susceptible to deterioration due to the growth of fungi, which are resistant to low pH and can proliferate at low storage temperatures. For controlling fungal growth in dairy products, potassium sorbate and natamycin are the main preservatives used, and natamycin is approved by most countries for use in cheese surface treatment. However, a strong societal demand for less processed and preservative-free food has emerged. In the dairy products, lactic acid bacteria (LAB) are naturally present or used as cultures and play a key role in the fermentation process. Fermentation is a natural preservation technique that improves food safety, nutritional value, and specific organoleptic features. Production of organic acids is one of the main features of the LAB used for outcompeting organisms that cause spoilage, although other mechanisms such as antifungal peptides obtained from the cleavage of food proteins and competition for nutrients also play a role. More studies for better understanding these mechanisms are required to increase antifungal LAB available in the market.

• Journal of Positioning, Navigation, and Timing
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• 제9권3호
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• pp.229-236
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• 2020

The trend of water vapor contents in atmosphere is one of key elements for studying climate change. The tropospheric products, i.e., ZTD values achieved through GPS data processing can retrieve the amount of water vapor with higher temporal and spatial resolution than any other instruments. In this study, the tropospheric products of KASINET for a time period from 2001 to 2014 are reprocessed using PPP strategy and the products from the CODE's 2nd reprocessing campaign. For consistency with reprocessing activities of other networks like EPN, the VMF1 mapping function and non-tidal loading effect due to atmospheric pressure are applied in the process. The reprocessing results are investigated through comparing with the CODE's 2nd reprocessing products by including some IGS stations in the process and also calculating weekly coordinate repeatability to see the quality of the processing. After removing outliers based on the variation of averaged formal error, all processed stations have similar variations of formal error about 2 mm which is lower than that of the IGS final product. Comparison results with the CODE's 2nd reprocessing products show that the overall mean difference is found to be -0.28±5.54 mm which is similar level of the previous studies. Finally, the ZTD trends of all KASINET stations are calculated and the averaged trend is achieved as 0.19 mm/yr. However, the trend of each month shows different amounts and directions from -1.26 mm/yr in May to 1.18 mm/yr in August. In conclusion, the reprocessed tropospheric product and applied strategy of this study has enough quality as one of reliable solution for a reference product for Korean Peninsula which is needed to use GPSbased tropospheric product for climate change research.

• 한국식품영양학회지
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• 제25권4호
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• pp.968-973
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• 2012

This study analyzes the structure types of salmon oil to evaluate the purity of salmon oil products based on the 38 different types of imported salmon oil products distributed in the Republic of Korea. The major types of omega-3 foods in the salmon oil are ethyl ester (EE) and triglyceride (TG). If the salmon oil contained potential contaminants and was processed in order to remove it, EE type omega-3 fatty acids are found in concentration. This provides a good guide in assessing if products were made with EE type ingredients or re-esterified contaminated materials. The results of the FT-IR analysis showed significant difference in the C=O, C-O band positions in TG and EE. There were 19 TG type products and 19 EE type products. The analysis of carbon isotope ratio was performed on the types of TG and EE. There were different properties in the 19 TG type products. In one product, the carbon isotope ratio was -25.15 and the other 18 products showed -22.15~-23.96. The carbon isotope ratio of all 19 EE type products showed -21.91~-23.74. The results of the TLC analysis showed similar results with FR-IR. The re-esterified TG form was not detected in the TG type products, confirming that the TG type products contained natural salmon oil. This study aimed to provide the basic material in classifying the types of natural salmon oil and re-esterified salmon oil, by analyzing the pattern and proportion of FT-IR spectrum, carbon isotope ratio, and TLC.

• 한국축산식품학회지
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• 제36권6호
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• pp.729-736
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• 2016

This study was performed to evaluate the quality of fermented sausages manufactured with processed sulfur-fed pigs. The fermented sausages were divided into two groups; one was manufactured with non sulfur-fed pigs (NP), the other one was made with processed sulfur-fed pigs (SP). No differences were found in moisture and fat contents (p>0.05) between NP and SP, but the protein and ash con-tents of SP were significantly higher than those of NP (p<0.05). The pH of SP was significantly lower than that of NP, and the water activity ($a_w$) of SP was significantly higher than that of NP after 14 and 21 d (p<0.05). The TBA (Thiobarbituric acid reactive substance) w value of SP was significantly lower than that of NP (p<0.05). The lightness and yellowness of NP were significantly higher than those of SP, whereas the redness of NP was lower than SP (p<0.05). The total plate count of SP was lower than that of NP (p<0.05). There was no significant difference in TPA (Texture profile analysis) between the two samples. SP showed significantly increased monounsaturated fatty acid (p<0.05) and decreased saturated fatty acid. Umami taste and richness in SP were significantly higher than in NP (p<0.05). Therefore, it is suggested that processed sulfur fed pigs may play a key role in enhancing the quality of meat products.

• 한국식생활문화학회지
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• 제13권4호
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• pp.267-274
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• 1998

신선편의 과채류의 소비형태를 조사한 결과를 요약하면 다음과 같다. 1. 과채류의 구입장소는 수퍼마켓이 46.4%로 가장 많으며 APT지역 거주자가 일반주택지 거주자에 비해 백화점과 수퍼마켓을 더 많이 이용하였다(p<0.05). 구입 빈도는 주$2{\sim}3$회 가 58%였고 미혼인 조사대상자의 50.0%가 주1회, 확대가족의 형태가 매일 구입하는 비율이 20.0%로 다른 가족구성에 비해 높게 나타났으며(p<0.05) 직업이 있는 사람보다 전업주부의 구입이 더 잦은 것으로 나타났다. 2. 과채류의 구입시 가장 우선적으로 고려하는 요인의 70.2%는 품질인 것으로 나타났고 고학력일수록(p<0.01), 타지역에 비해 APT지역에 거주자들이 보다 고품질을 중요시하였다(p<0.05). 3. 구입하는 과채류의 형태는 주로 생산된 그대로의 신선한 과채류였으며 최소가공처리 된 신선편의 과채류를 주로 구입하는 사람은 미혼(37.5%)또는 무자녀 가정 (16.7%)이었다(p(0.01). 4. 신선편의식품화된 과채류의 구입경험이 있는 사람은 81.0%로 저연령($20{\sim}30$대), 고학력일수록 더 많이 구입한 것을 알 수 있었다(p<(0.05) 구입한 신선편의식품화된 과채류는 적정량의 단순 절단가공형태가 가장 많았다. 5. 신선편의식품화된 과채류의 구입동기는 조리시간 단축과 적정량 구입이 가장 많은 것으로 나타났고, 구입하지 않은 이유로는 가격이 비싸거나 비위생적으로 생각되었기 때문으로 나타났다. 6. 신선편의식품화된 과채류의 필요성에 대하여서는 92.5%가 긍정적인 반응을 보였는데 이를 위해 고려할 사항은 신선도와 위생적 처리, 좋은 외관과 영양소의 보존 등의 순으로 나타났고, 신선도 저하와 비싼 가격 등의 문제가 신선편의식품화된 과채류의 생산과 판매를 부정적으로 받아들이게 하는 원인이 되는 것으로 나타났다. 조사대상자들이 원하는 신선편의식품화된 과채류의 가격은 가공전 상태의 $110{\sim}120%$ 수준으로 조사되었다.

• Journal of Advanced Marine Engineering and Technology
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• 제34권4호
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• pp.460-469
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• 2010

우리나라의 수산 양식과 어로기술은 세계적 수준임에도 불구하고, 가공기술은 상대적으로 낙후되어 있다. 수산가공품은 냉동품, 통조림, 염장식품(젓갈), 연제품(어묵) 등이 대부분으로, 특히 부가가치가 가장 높은 고품질의 수산 건제품은 매우 적다. 이러한 문제는 단적으로 건조기술의 부족에 기인한다고 사료된다. 본 논문은 부패하기가 쉽지만 향후 대량 생산이 계획되어 있는 고가 수산물의 고품질 건조 가공이 기능하게 하기 위한 에너지 절약형 진공건조장치의 건조열전달특성에 관하여 수행한 실험적 결과를 보고한 것이다.