• 생명과학회지
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• 제32권6호
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• pp.438-446
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• 2022

꽃은 특유한 모양, 색, 향, 맛으로 인한 시각적, 후각적 관능성이 우수하다. 최근에는 식용 꽃을 건조한 후 열수로 우려내는 침출차가 사회적 관심을 받고 있으며, 식용꽃을 이용한 기능성 식의약품 소재 개발도 진행되고 있다. 그러나 현재까지 건조꽃차의 유해 미생물, 중금속 및 잔류농약에 대한 위해성 평가는 거의 이루어진 바 없으며 농산물과 달리 건조꽃차에 대한 안전성 규격도 마련되어 있지 않다. 본 연구에서는 시판 건조꽃차의 유해 미생물, 중금속 및 잔류농약 오염도를 평가하였다. 먼저 유해 미생물 오염도 평가에서 23종 꽃차 시료 모두에서 대장균군 및 리스테리아균은 검출되지 않았다. 그러나 갈화, 캐모마일꽃, 아카시아꽃, 진달래꽃, 달맞이꽃, 유채꽃, 벚꽃의 경우 3.24~3.85 Log CFU/g의 일반세균이 검출되었으며, 황색포도상구균도 23종 꽃차 중 11종에서 검출되었다. 살모넬라균 역시 23종 꽃차 중에서 8종에서 검출되어 시판 꽃차의 유해 미생물 관리가 필요함을 확인하였다. 한편 대부분의 꽃차에서는 Pb, Cd, Co, Cr, Cu, Ni 및 As 유해 중금속은 검출되지 않았으나, 원추리꽃차에서만 0.08 ppm의 Pb가 검출되었다. 따라서 시판 꽃차에서 별도의 중금속 위해는 없을 것으로 판단된다. 건조꽃차의 경우 일부 꽃에서 잔류농약이 검출되었으나 극미량(0.01~0.08 ppm)으로 유해성은 없으리라 판단되었으며, 다만 국화꽃차에서 검출된 chlorpyrifos (0.215 ppm)의 경우 잠재적 위해 가능성이 인정되었다. 본 연구 결과는 건조꽃차의 잔류농약기준 설정이 필요하며, 식용꽃차의 안전성 확보를 위해 식용꽃차와 농약 사용이 허용되는 관상용 꽃의 엄격한 재배 구분이 필요하며, 꽃의 수확, 가공, 유통 단계에서 미생물적 오염 방지 노력도 필요함을 제시하고 있다.

• 한국엔터테인먼트산업학회논문지
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• 제13권5호
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• pp.25-36
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• 2019

본 연구는 다양한 연령층으로 확대되고 있는 패스트푸드의 섭취실태 등을 분석하여, 소비자들이 균형되고 올바른 식생활을 실천할 수 있는 영양프로그램 개발 및 교육을 위한 자료로 활용하고자 수행하였다. 패스트푸드 섭취빈도는 20대와 30대에서 높았으며, 연령에 따라 유의한 차이를 보였다. 패스트푸드를 선택할 때 정보를 얻는 곳은 20대는 주로 친구와 인터넷이었으며, 30대 이상은 대중매체를 주로 이용하였다. 패스트푸드 섭취로 인한 가장 큰 식생활의 변화는 자극적인 음식을 좋아하게 되었고 외식의 빈도가 증가하였다. 패스트푸드를 젊은층은 맛이 있어서 선택하였으며, 중장년층은 시간의 영향을 받지 않아서 선택하였다. 패스트푸드를 섭취하였을 때 염려되는 것으로 30대는 주로 체중의 증가와 50대 이상은 건강에 영향을 주는 것으로 나타났다. 패스트푸드에서 개선되기를 바라는 것은 영양, 위생, 가격으로 나타났다. 결론적으로 패스트푸드 섭취빈도, 선택 및 만족도 등이 연령에 따라 유의적으로 영향을 받는 것으로 나타났다. 그러므로 전 연령층을 대상으로 하는 패스트푸드 섭취와 관련된 연구가 활성화되어 균형된 식생활을 실천할 수 있는 영양프로그램 개발 및 교육을 위한 기초자료의 확보가 필요할 것으로 생각된다.

• 생명과학회지
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• 제34권6호
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• pp.385-392
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• 2024

고추(Capsicum annuum L.)는 전 세계적으로 식용 및 의약용으로 널리 사용되는 향신 식물이다. 본 연구에서는 한국 재래종 5종(유월초, 수비초, 수미향, 고운빛, 및 칠성초)과 개량종 5종(다복, 청양, 충성, 올복합 및 신홍길동)의 에탄올 추출물을 조제하고, 추출물의 색차, polyphenol 함량, 항산화, 항당뇨 및 항응고 활성을 비교하였다. 개량종 고추 추출물은 재래종 고추 추출물에 비해 높은 적색과 낮은 황색을 보였다. 고추 추출물의 polyphenol 및 flavonoid 함량 분석결과, 유월초와 수미향 추출물에서 유의하게 높았으며, 이들은 우수한 DPPH 음이온 소거 활성, ABTS 양이온 소거 활성 및 환원력을 보였다. Nitrite 소거능의 경우 칠성초, 유월초 및 다복 품종에서 유의하게 높게 나타났다. 또한 항당뇨 활성은 수비초, 수미향 및 고운빛 추출물에서 우수하였다. 항혈전 활성 평가에서, 유월초 추출물은 5 mg/ml 농도에서 용매대조군과 비교하여 thrombin time을 1.61배 연장시켰으며, 다복 추출물은 prothrombin time 및 activated partial thromboplastin time을 각각 1.33배 및 2.21배 연장시켜 항혈전 활성을 확인하였다. 또한 모든 고추 추출물은 5 mg/ml 농도까지 적혈구 용혈 활성을 나타내지 않았다. 이러한 결과는 국내 재래종 고추를 이용한 항산화, 항당뇨 및 항혈전 소재 개발이 가능함을 제시하고 있으며, 향후 국내 재래종 고추 품종이 나고야 의정서 발효에 대응하면서 막대한 종자 사용료를 지불하고 있는 개량종 고추를 대치할 수 있음을 제시하고 있다.

• Journal of Microbiology and Biotechnology
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• 제18권4호
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• pp.616-623
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• 2008

In spite of an increasing interest in fucoidans as biologically active compounds, no convenient commercial sources with fucoidanase activity are yet available. A marine bacterial strain that showed confluent growth on a minimal medium containing fucoidan, prepared from Korean Undaria pinnatifida sporophylls, as the sole carbon source was isolated and identified based on a 16S rDNA sequence analysis as a strain of Sphingomonas paucimobilis, and named Sphingomonas paucimobilis PF-1. The strain depolymerized fucoidan into more than 7 distinct low-molecular-mass fucose-containing oligosaccharides, ranging from 305 to 3,749 Da. The enzyme activity was shown to be associated with the whole cell, suggesting the possibility of a surface display of the enzyme. However, a whole-cell enzyme preparation neither released the monomer L-fucose from the fucoidan nor hydrolyzed the chromogenic substrate p-nitrophenyl-${\alpha}$-L-fucoside, indicating that the enzyme may be an endo-acting fucoidanase rather than an ${\alpha}$-L-fucosidase. Therefore, this would appear to be the first report on fucoidanolytic activity by a Sphingomonas species and also the first report on the enzymatic degradation of the Korean Undaria pinnatifida sporophyll fucoidan. Moreover, this enzyme activity may be very useful for structural analyses of fucose-containing polysaccharides and the production of bioactive fucooligosaccharides.

• 한국양식학회:학술대회논문집
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• 한국양식학회 2003년도 추계학술발표대회 논문요약집
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• pp.17-18
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• 2003

Although flounder is one of the most important marine fish for aquaculture in Korea, feeding the flounder in commercial farms depends mainly on moist pellet in which over 70% frozen fishes (e.g. frozen horse mackerel) are incorporated in its formulation. Therefore, for further expansion of flounder farming, it is essential to employ practical formulated feeds that can support reasonable growth. Development of nutritionally balanced and cost-effective feeds is dependant on the information about nutritional requirement and feed utilization of the species. Nutrient and energy source in feed are needed for the growth and maintenance of fish. Protein is probably the most important nutrient affecting fish growth and feed cost. Therefore, it is essential to determine the optimum dietary protein level for the growth of fish, both its high proportion in the feed and because it is the main factor in determining feed cost. Dietary energy level is also critical because protein source in the feed is utilized as an energy source when the feed deficient in energy is fed to fish, whereas when the feed excess in energy is fed to fish, feed consumption decreased and resulted in growth reduction due to lack of other necessary nutrients for normal growth. Improper dietary protein, energy levels and/or their ratio will lead to an increase of fish production cost and deterioration of water quality resulting from wasted feed; thus, they are important in formulating commercial feed. Dietary lipids play important roles in providing energy and essential fatty acid for normal growth and survival of fish. Although carbohydrates are not essential nutrients for carnivorous fish, these compounds play important roles as a low-cost energy source for protein sparing and also as a feed binder. Nutrition researches for flounder have identified its requirements of protein, lipid and essential fatty acid, vitamin, and minerals for normal growth. Other studies have also been carried out to investigate the utilization of the protein, lipid and carbohydrate sources. Based on these nutritional information obtained, practical feed formulations have been studied for improve aquaculture production of flounder. The results of the researches on utilization of dietary protein, lipid and carbohydrate by flounder are discussed in this review.

• Asian-Australasian Journal of Animal Sciences
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• 제12권5호
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• pp.794-798
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• 1999

An experiment was conducted to determine the effects of supernormal level of copper (Cu) from different supplementary sources on the performance, cholesterol level in plasma and breast muscle, and accumulation of fat and Cu in broilers. In a 5 wk feeding trial, two hundred forty hatched male broiler chickens were assigned to four dietary treatments: control diet containing 10 mg/kg supplementary Cu, control diet plus 250 mg/kg Cu from $CuSO_4$ ($CuSO_4-250$), control diet plus 125 mg/kg Cu from Cu-methionine chelate (Cu-Met-125), and control diet plus 250 mg/kg Cu from Cu-methionine chelate (Cu-Met-250). Weight gain in Cu-Met-125 treatment and Cu-Met-250 treatment were not different, but they were significantly (p<0.05) greater than that in $CuSO_4-250$ treatment. Plasma total cholesterol and reduced glutathione (GSH) in blood were significantly reduced by supplementation of $CuSO_4-250$, but were not significantly affected by Cu-Met supplementations. Plasma HDL cholesterol, plasma triglycerides and breast muscle cholesterol were not significantly affected by Cu supplementation. $CuSO_4-250$ improved metabolizability of crude fat, which resulted in low abdominal fat pad weight. Cu from Cu-Met was better absorbed and accumulated more in the breast muscle and lesser in the liver compared with Cu from $CuSO_4$.

• 한국식생활문화학회지
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• 제26권6호
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• pp.657-672
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• 2011

This study was a survey of consumer awareness and attitudes about genetically modified foods and their labeling regulations. Questionnaires were distributed to 4,620 consumers who lived in different areas of Korea, and 4,076 people responded. The consumers were asked about knowledge, labeling information, and their sources of information about GM foods. Respondents from Seoul, Jeonnam, and Gyeongnam answered mostly "nearly don't know > moderate > never know > know a little." Respondents from Gyeonggi answered "moderate > nearly don't know > never know > know a little." According to occupation, housewives, company employees, consultants, and students answered mostly "nearly don't know > moderate > never know > know a little. "Consumers answered about the intent to buy GM foods differently according to area, occupation, and education. Seoul and Gyeonggi residents said that reinforcing factors to relieve the insecurity of GM foods were "evaluating safety > management of GM foods by the government > GM food regulation system." There were other answers according to area, occupation, and education. About GM-related education methods that they wished to have, residents of the Seoul area said "books/leaflets" most often, but residents of the Gyounggi area said "attending a lecture" most often. Housewives also said "attending a lecture," but teachers and students said "Internetbased education" most often. About the kinds of education that they could join, Seoul residents answered "consumer groups > school parents > public institutions," but Gyeonggi and Chungnam area residents answered "public institutions > consumer groups > school parents." Housewives and students answered "consumer groups" most often, but consultants and private business owners answered "public institutions" most often. We realized that different education methods were necessary for different areas, occupations, and education levels.

• 한국환경보건학회지
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• 제38권2호
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• pp.136-141
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• 2012

Objectives: The objective of this study was to investigate whether the ammonia nitrogen concentration of aqueous samples such as drinking water can be determined by measuring the saturation of the samples colored by indophenol method. Methods: A color saturation measurement system was constructed by connecting a notebook computer to an image acquisition device composed of a PC camera and a light source, and was then used to measure the saturation of samples colored by blue indophenol complex. Results: Between two available light sources, a fluorescent lamp was selected due to its demonstrating better linearity between color saturation and ammonia nitrogen concentration. Prediction by quadratic regression was more accurate than by linear regression, and prediction by quadratic regression in the concentration range of 0.1-1.0 $mg/l$ was more accurate than in the concentration range of 0.0-1.0 $mg/l$. Regression-based predictions over 0.25 $mg/l$, 0.55 $mg/l$ and 0.75 $mg/l$ concentrations were implemented both by spectrophotometric method and by measuring color saturation. In the case of 0.25 $mg/l$, the predicted concentration by spectrophotometric method was $0.256{\pm}0.0076\;mg/l$ and the predicted concentration by measuring color saturation was $0.246{\pm}0.0086\;mg/l$ (p=0.051). In the case of 0.55 $mg/l$, they were $0.561{\pm}0.0068\;mg/l$ and $0.564{\pm}0.0166\;mg/l$ (p=0.660). In the case of 0.75 $mg/l$, they were $0.755{\pm}0.0139\;mg/l$ and $0.762{\pm}0.0088\;mg/l$ (p=0.215). Conclusions: There were no statistically significant differences (p>0.05) between the data from the two methods in all three of the concentrations. Therefore, the color saturation measurement method proposed in this paper may be considered applicable for determining the ammonia nitrogen concentration of aqueous samples such as drinking water.

• 대한예방한의학회지
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• 제17권3호
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• pp.143-153
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• 2013

Objective : This study was done to define the treatment protocol of Traditional Korean Medicine for persistent allergic rhinitis, which might be necessary for conducting PRCT study. Methods : Data were collected by questionnaire from Korean Medicine doctors participated in the Conference of The Korean Oriental Medical Ophthalmology & Otolaryngology & Dermatology Society in October 2012. We investigated their treatment procedures for persistent allergic rhinitis in ordinary clinical settings. Their treatment patterns including annual treatment period, frequencies and treatment times were also investigated. Finally, we combined the national insurance covered or out-of-pocket treatments as treatment packages according to the response rates of each contents, and displayed them as treatment protocols for PRCT study. Results : 50 Korean medicine doctors described the informed consent and questionnaire. Response rates of each treatment procedure were listed in Table 2 to Table 5. Treatment periods, frequencies and treatment time of each visit were listed in Table 6. Finally, treatment packages which would be defined for PRCT were listed in Table 7 as treatment package 1(response rates were over 50%), package 2(response rates were over 25%), package 3(response rates were over10%). Conclusion : These results provide the rational background and preliminary sources of defining treatment packages for developing PRCT protocols.

• Journal of Dairy Science and Biotechnology
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• 제33권3호
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• pp.197-202
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• 2015

While various foodborne pathogenic bacteria can be detected more rapidly via polymerase chain reaction than via conventional plating methods, it is impossible to distinguish between viable and dead cells in DNA-based assays. Hence, propidium monoazide (PMA) treatment has been introduced to detect living cells. The purpose of this study is to evaluate the applicability of the PMA treatment and real-time qPCR method for the detection of Cronobacter sakazakii and to compare it to that of plate counting. Based on our positive results, we suggest the use of PMA treatment and real-time qPCR for the detection of viable Cronobacter sakazakii in various food sources and an update of the Korean Food Code.