• 한국식생활문화학회지
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• 제30권6호
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• pp.773-777
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• 2015

Increasing use of organically grown foods has renewed interest in the relationship between agricultural methods and food quality. The objective of this study was to evaluate the physicochemical characteristics and antioxidant activities of organic strawberries. For this study, strawberries were measured in terms of quality characteristics, including weight, length, diameter, hunter color, soluble solid contents (SSC), moisture contents, and pH, as well as antioxidant activities, including DPPH and ABTS radical scavenging activities and total phenol and flavonoid contents. Consequently, conventional strawberries showed higher weight, diameter, and L (lightness) and b (yellowness) values than organic strawberries (p<0.001). Length, moisture contents, pH, a (redness) value, and DPPH and ABTS radical scavenging activities were similar (p<0.05). However, organic strawberries showed higher SSC and total flavonoid and phenol contents than conventional strawberries (p<0.001). These results indicate that there were significant differences between organic and conventional agriculture techniques.

• 농업과학연구
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• 제49권3호
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• pp.397-405
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• 2022

Castor oil cake is widely used as a raw material for organic fertilizers (OF) in Korea. Compared to other fertilizer raw materials, it is highly dependent on imports. In terms of replacing raw materials, dehydrated food waste powder (FDP) and castor oil cake have similar nutritional content, and if 30% is replaced, about 20% of the raw material cost can be saved. However, few studies on the effects on crop growth and soil properties when organic fertilizer and dry food waste powder are mixed and applied to the soil have been reported. The effects of an organic fertilizer made by mixing the commercial available organic fertilizer with dehydrated food waste (OF + FDP) on soil properties and the growth of two types of leafy vegetables (lettuce and young radish) were evaluated and compared with the performance of OF. The fresh weights of lettuce and young radish were the highest with OF amendment and stood at 114.3 and 119.0 g·plant^-1, respectively. These were followed by OF + FDP amendment, which produced 103.1 and 109.6 g·plant^-1, respectively. Compared to the control, OF and OF + FDP increased the lettuce fresh weights by about 69% and 52%, respectively, while the fresh weights of the radish were increased by about 223% and 207%, respectively. The soil pH, EC, total carbon content, and organic matter content in OF and OF + FDP increased. The mixture of dehydrated food waste powder and organic fertilizers is expected to improve soil quality and facilitate stable production of crops and contribute to the substitution of imported organic fertilizer raw materials.

• Food Science and Biotechnology
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• 제17권3호
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• pp.447-456
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• 2008

Limonene, pinene, and isoprene are abundant and ubiquitous volatile organic compounds (VOCs) which are found in various natural products and also produced from various manufacture processes. Limonene and pinene are major components of food additives and household products for enrichment of good flavors and elimination of malodors, and isoprene is a basal motif of monoterpenes such as limonene and pinene. They have shown many beneficial effects such as chemopreventive, chemotherapeutic, and antioxidant activities. Upon certain conditions, however, adverse effects of these compounds on human health have also been reported. Although they do not seem to have acute and severe toxicity to human, they can easily generate secondary organic aerosols (SOAs) when they react with oxygen and/or ozone, which have shown certain toxic effects on experimental animal models as well as on humans. Numerous household and scented products containing limonene, pinene, and isoprene are widely used in these days. However, biological consequences upon exposure to these products are largely unknown. The aim of this review is to summarize and analyze the current understanding on the biological effects of VOCs, in particular limonene, pinene, and isoprene, as well as their SOAs.

• 한국식품저장유통학회지
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• 제13권5호
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• pp.655-660
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• 2006

유기재배법이 배추의 화학적 품질특성에 미치는 영향을 규명하기 위하여, 유기와 일반 재배 배추의 영양 및 기능성성분의 함량을 각각 비교분석 하였다. 일반성분 중 수분은 유기농 배추보다 일반배추에서 높은 함량을 나타내었으나 조단백질, 조지방, 탄수화물 및 조회분은 일반배추보다 유기농배추에서 높은 함량을 나타내었다. 수용성 및 불용성식이섬유, ascorbic acid 및 dehydroascorbic acid, chlorophyll a 및 b, carotenoid 등의 각 함량은 일반배추보다 유기농배추에서 높게 나타났다. 무기질 중 칼륨함량은 유기농배추보다 일반배추에서 높았으나 칼슘, 인, 철, 마그네슘, 황 및 아연의 함량은 일반배추보다 유기농배추에서 높게 나타났다. 유리당인 fructose, glucose 및 sucrose의 각 함량은 유기농배추에서 높았으나 유기산인 malic acid와 citric acid의 함량은 유기농배추에서 낮게 나타났다.

• 유통과학연구
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• 제10권2호
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• pp.53-62
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• 2012

본 연구는 소비자의 구매의도 형성과 관련된 선행요인을 설명하는 주된 이론인 계획적 행동모델을 토대로 식품 관련 및 식품소비관련 소비자의 개성특성, 과거 구매행동 빈도 등의 요인들을 포함하여 유기농식품에 대한 소비자의 구매의도에 미치는 구체적인 영향요인을 제시하고자 이루어졌다. 분석결과를 요약하면 다음과 같다. 첫째, 계획적 행동모델에서 주관적 규범을 제외한 태도, 지각된 행위통제(비용)는 구매의도에 유의하게 영향력이 있는 것으로 나타났으며, 특히 유기농식품에 대해 긍정적인 태도를 가질수록 구매의도가 증가할 확률이 높아진다고 할 수 있다. 둘째, 식품에 대한 관심이 많고 중요하게 생각하는 소비자일수록 유기농식품에 대하여 호의적인 태도를 가지게 될 확률이 증가하며, 과거에 유기농식품을 구매한 빈도가 유기농식품에 대한 구매의도에 영향을 미치는 것으로 나타났다. 셋째, 유기농식품을 이용하지 않을 경우 나타날 수 있는 소비자의 부정적 감정이 유기농식품에 대한 구매의도에 부(-)의 영향을 미치는 것으로 나타났다. 넷째, 주관적 규범은 구매의도에, 식품 관련 개성특성(저항감)은 태도에 유의한 영향을 미치지 않는 것으로 나타났다. 본 연구에서 밝혀진 연구결과는 점차적으로 계획적 행동모델의 설명력을 높이기 위해 다양한 요인들을 포함하는 모델의 확장에 대한 필요성이 제기되고 있는 가운데, 향후 소비자들의 구매행동에 있어 구매의도에 추가적인 요인들의 영향력을 검증하였다는 점에서 그 의미를 찾을 수 있다. 하지만 본 연구에서는 식품의 종류를 구분하지 않고 조사하였기 때문에 식품의 종류에 따라 소비자의 반응이 다를 수 있기에 향후에는 이점을 보완해 나가야할 것이며, 또한 구매경험여부에 따라 군집을 나누어 연구하지 않았기 때문에 유기농식품의 구매경험여부에 따라 구매자들을 비교, 검토하여 연구해나가야 필요성이 제기된다.

• 환경생물
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• 제27권3호
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• pp.279-284
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• 2009

In order to understand food sources-metabolism for the pacific oyster (Crassostrea gigas), the stable isotope ratios of carbon (${\delta}^{13}C$) and nitrogen (${\delta}^{15}N$) of its gut, gill, and muscle as well as potential food sources (particulate organic matter, sedimentary organic matter, benthic microalgae, seagrass detritus) were determined in Dongdae Bay. Average ${\delta}^{13}C$ and ${\delta}^{15}N$ values reflect that oysters primarily fed on sedimentary organic matter as opposed to suspended organic matter during summer and winter seasons. However, the relatively enriched $^{15}N$ values of particulate organic matter (>$250{\mu}m$) and sedimentary organic matter in the summer may be due to the photosynthetic incorporation of $^{15}N$-enriched nitrogen (DIN) or the spawning events of bivalves. Specific oyster tissues (gut, gill, and muscle) revealed different metabolic pathways, which were determined through analysis of ${\delta}^{13}C$ and ${\delta}^{15}N$ in each organ. The present results suggest the determination of carbon and nitrogen stable isotopes to be a useful approach in ecological research related to the food sources- metabolism of Crassostrea gigas.

• The Journal of Asian Finance, Economics and Business
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• 제8권1호
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• pp.915-925
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• 2021

The study investigates some psychological and environmental factors affecting the intention to purchase organic foods of consumers in the inner-city of Hanoi. Impact factors applied for the study include three psychological factors (health concern, environmental concern, consumer awareness of organic foods) and seven environment factors (family's opinion, friends and colleagues' opinion, influence of celebrities, expert's opinion, social status, mass media, state's encouragement). We analyzed research data from 396 consumers to measure the impacting level of these factors. The convenient sampling method was used to collect the research sample. The measurement applied a 5-point Likert scale classifying from 1-completely disagree to 5-completely agree. Based on previous studies, the research model was recommended. We had estimated the reliability of the scales through Cronbach's Alpha and composite reliability. The research data is analyzed by using Structural Equation Model method (SEM). The findings of the study suggest that psychological factors (health concern, environmental concern, consumer awareness of organic foods) had a significantly positive influence on consumer's purchase attention toward organic food. The results also revealed that environmental factors (family's opinion, friends and colleagues' opinion, influence of celebrities, expert's opinion, mass media) were positively linked to consumer's purchase attention toward organic food.

• 한국유기농업학회:학술대회논문집
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• 한국유기농업학회 2001년도 심포지엄
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• pp.236-242
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• 2001

(No Abstract, See Full-text)

• Environmental Engineering Research
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• 제18권4호
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• pp.259-265
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• 2013

This study was conducted June 2011 at Gamo Lagoon, after tsunami of March 2011, to estimate food sources and utilization. The results show that the tsunami affected the sediment properties by changing the physical environmental alterations. The fatty acids of the gut content of Nuttallia olivacea mostly comprised the same organic matter found in the sediment. Fatty acids in the tissues showed mainly diatoms, bacteria, and dinoflagellates. That is, most of the food sources (i.e., diatoms, bacteria, dinoflagellates, macroalgae, and terrestrial organic matter) probably pass through the digestive system unharmed; however, terrestrial organic matter, which is refractory to biochemical degradation, indicated a different assimilation trend between the gut content and the tissue. This result suggests that input of labile organic matter from the sediment may control selective metabolism in N. olivacea. From these results, although the physical environment of sediment characteristics by tsunami changed, the food utilization of N. olivacea suggested a better assimilation of selected components from the gut content, irrespective of physical alteration.

• 한국식품과학회지
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• 제45권1호
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• pp.120-125
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• 2013

유리섬유를 이용하여 B. cereus의 biofilm 형성 조건을 확인한 결과 3시간 이후부터 부착하여 48시간에 biofilm이 많이 형성된 것을 확인하였다. 그리고 biofilm 형성 B. cereus의 제어를 위해 에탄올, NaCl, 유기산을 각각 단독으로 처리하였을 때 1% 젖산, 아세트산, 구연산을 30분 처리하였을 때 약 5-6 log CFU/g-glass wool 수준 감소하여 가장 좋은 효과를 나타냈다. 또한, 20% 에탄올과 각각의 1% 유기산, 20% 에탄올과 10% NaCl의 두 가지를 혼합 처리의 경우 단독으로 처리했을 때보다 저감화 효과가 우수했으며, 20% 에탄올과 10% NaCl 및 각각의 1% 유기산을 1-5분 동안 혼합 처리 했을 때 약 7-8 log CFU/g-glass wool 수준이 감소하여 biofilm 형성 B. cereus의 제어에 가장 효과적이었다. 따라서 본 연구 결과를 통해 유기산, 에탄올, NaCl 복합 처리 방법을 사용하여 biofilm 형성 B. cereus의 저감화를 효과적으로 할 수 있을 것으로 판단된다.