• Nutrition Research and Practice
• /
• 제14권3호
• /
• pp.276-285
• /
• 2020

BACKGROUND/OBJECTIVES: As watching food-related programs has become very popular among the young generation in Korea, this study sought to compare the Mukbang- and Cookbang-watching status of university students with their dietary life. SUBJECTS/METHODS: The participants were 380 students who were not majoring in food and nutrition at a university in Gyeonggi, Korea. Based on self- reports, the participants were grouped according to their frequency of watching Mukbang or Cookbang: frequent-watching (FW) 21.1% and 5.3%, respectively; moderate-watching (MW) 43.9% and 27.9%, respectively; and not-watching (NW) 35.0% and 66.8% respectively. RESULTS: In the FW group, up to 88.8% and 70.0% of participants reported watching Mukbang and Cookbang, respectively, ≥ 3 days/week. Almost all participants in the FW and MW groups reported intention to keep watching these shows. The most frequent watching route was "YouTube" and the most important criterion to select a program was "food". In the case of Mukbang, but not Cookbang, the participants in the FW group scored their diet significantly worse than those in the NW group (P < 0.05). A greater proportion of participants felt that watching Cookbang improved their diets rather than worsened them (14.3% vs. 0.8%, respectively), while more participants said that watching Mukbang worsened their diets rather than improved them (8.1% vs. 2.4%, respectively). In both cases, greater differences were shown in the FW groups compared to the MW groups (P < 0.05 and P < 0.01 for Cookbang and Mukbang, respectively). Moreover, the participants answered that Mukbang-watching prompted them to eat more of less desirable food, such as through eating out and purchasing convenient and delivered foods, whereas Cookbang-watching made them want to cook more of their own food. CONCLUSIONS: Our results suggested that Korean university students who frequently watch Mukbang, but not Cookbang, may be a nutritionally vulnerable group that needs attention.

• 한국자원식물학회:학술대회논문집
• /
• 한국자원식물학회 2023년도 임시총회 및 춘계학술대회
• /
• pp.38-38
• /
• 2023

Sorghum (Sorghum bicolor L.) is a promising biomass crop with a high lignocellulose content. This study aimed to select high salt-tolerance sorghum lines for cultivation on reclaimed land. Using 7-day seedlings of the sorghum population consisted of 71 radiation-derived mutants (M₂ to M₆) and 33 genetic resources, survival rate (SR), plant height (PH), root length (RL), fresh weight (FW), and chlorophyll content (CC) were measured for two weeks after 102 mM (0.6%) NaCl treatment. Furthermore, the characteristics of the sorghum population were confirmed using correlation analysis, PCA (principal component analysis), and the FCE (fuzzy comprehensive evaluation) method. Under 102 mM NaCl conditions, SR ranged from 4.9 (IS645-200-6) to 82.4% (KLSo79125-200-1), with an average of 49.9%. PH varied from 7.5 (Mesusu-100-2) to 33.2 cm (DINE-A-MITE-100-2-10), with an average of 20.4 cm. RL ranged from 1.0 (IS645-200-1) to 17.0 cm (30-100-2), with an average of 7.7 cm. FW varied from 0.1 (IS645-200-6) to 4.5 g/plant (DINE-A-MITE-100-2-10), with an average of 2.1 g/plant. CC ranged from 0.9 (DINE-A-MITE-100-2-2) to 3.1 mg/g (IS12937), with an average of 1.7 mg/g. An overall positive correlation, with SR and FW (r = 0.86, P < 0.01), and FW and CC (r = 0.79, P < 0.01), was shown by correlation analysis. Among the five traits, two principal components were extracted by PCA analysis. PC1 was significantly associated with FW, while PC2 was highly involved with RL. To evaluate the salt tolerance level of the sorghum population when an FCE based on trait data was performed, MFV (membership function value) was 0.68. As a result of compiling the MFV of each line, eight lines with MFV > 0.68 were selected. Ultimately, the radiation-derived mutant lines, DINE-A-MITE-100-2-10 and DINE-A-MITE-100-2-12 were selected as salt-tolerant sorghum lines. The results are expected to inform salt-tolerant sorghum breeding programs, and the high salt-tolerance sorghum lines might be advantageous for cultivation on reclaimed land.

• 한국해양학회지:바다
• /
• 제16권4호
• /
• pp.196-205
• /
• 2011

국내 해조류 양식종인 다시마(Saccharina japonica (Laminaria japonica Areschoug))의 영양염 및 무기탄소 흡수율과 광합성 특성을 살펴보기 위해, 부산시 기장군 일광해역 양식장에서 2011년 l월부터 5월동안 시료를 채집하여 실내 배양하였다. 배양 시료의 엽장과 엽폭 범위는 각각 46~288 cm, 4.8~22.0 cm였으며, 이들의 용존산소 평균 생산율은 $6.9{\pm}5.8{\mu}mol\;g^{-1}$ fresh weight(FW) $h^{-1}$, 질산염과 인산염 흡수율은 각각 $175.6{\pm}161.1\;nmol\;g^{-1}\;FW\;h^{-1}$, $12.7{\pm}10.1\;nmol\;g^{-1}\;FW\;h^{-1}$ 그리고 용존무기탄소 흡수율은 $8.9{\pm}7.9{\mu}mol\;g^{-1}\;FW\;h^{-1}$이었다. 다시마 엽장에 따른 이들 성분의 생산/흡수율은 로그함수 관계를 보여, 엽장 100~150 cm 이상부터는 다시마의 광합성 및 생장율이 다소 둔화되는 것으로 나타났다. 용존 산소 생산율과 질산염, 인산염, $TCO_2$ 흡수율은 각각 음의 선형관계를 보였으며, 특히 용존산소 생산율과 $TCO_2$ 흡수율은 높은 상관관계 ($r^2$=0.94)를 나타내어 서로에 대한 간접 지표가 될 수 있음을 의미한다. 다시마의 최대양지수율($F_v/F_m$)과 용존산소 및 무기탄소 생산/흡수율사이에 선형관계가 나타났으며, 양자수율이 높을수록 활발한 광합성작용으로 용존산소 생산이 활발함을 증명하였다. 광합성 형광특성 중 최대상대전자전달률은 비교적 엽체가 생장할수록 증가하였으며, 엽체의 부착부에 비해 상부 말단으로 갈수록 증가하였다. 이는 다시마가 생장할수록 광합성활성 조직 비(단위 면적당 습중량)가 증가하여 나타난 결과로 사료된다. 기장해역에서 다시마에 의한 연간 무기탄소 흡수량은 $1.0\sim1.7{\times}10^3C$ ton으로 추정되며, 이는 부산시 이산화탄소 배출량의 0.02~0.03%에 해당한다. 따라서 해조류에 의한 연안의 탄소 및 물질순환과 지구시스템에서의 역할을 파악하기 위해 추가적인 연구가 필요할 것으로 생각된다.

• 환경생물
• /
• 제32권4호
• /
• pp.297-305
• /
• 2014

부산시 강서구 낙동강 하구에서 채집한 방사무늬김(Porphyra yezoensis Ueda)의 용존산소 생산율은 $68.8{\pm}46.0{\mu}mol\;{g_{FW}}^{-1}h^{-1}$, 질산염과 인산염 흡수율은 각각 $2.5{\pm}1.8{\mu}mol\;{g_{FW}}^{-1}h^{-1}$, $0.18{\pm}0.11{\mu}mol\;{g_{FW}}^{-1}h^{-1}$ 그리고 용존무기탄소 흡수율은 $87.1{\pm}57.3{\mu}mol\;{g_{FW}}^{-1}h^{-1}$이었다. 용존산소 생산율과 질산염, 인산염, 용존무기탄소 흡수율은 각각 음의 선형관계를 보여, 광합성활동에 의한 결과물임을 파악할 수 있었다. 김의 생중량에 따른 이들 성분의 생산/흡수율은 로그함수적으로 감소하여, 성체(>~0.3 g)보다는 어린 엽체의 광합성효율이 매우 높은 것으로 나타났으며, 이는 질소부족으로 인한 황백화가 양식초기에도 발생할 수 있음을 제시하였다. 우리나라 시도 단위로 월별 생산되는 김 생산량과 양식면적을 바탕으로 질소요구량과 탄소흡수율을 산정한 결과, 생산량이 가장 높은 전라남도보다 부산(경상남도 포함)과 전라북도의 단위면적당 질소요구량이 높았다. 최근 김 황백화가 빈발하는 전라북도는 좁은 면적에서의 과밀 생산과 최대수확기가 육상과 저층으로부터 영양염 공급이 부족한 12~1월인 점 등이 황백화의 원인인 것으로 추정된다.

• 원예과학기술지
• /
• 제31권2호
• /
• pp.224-230
• /
• 2013

The objective of this study was to identify the content of phenolic and volatile organic compounds in edible and non-edible parts of 'Seolhyang' strawberry plants. We performed a comparative chemical analysis of the compounds found in roots, leaves, petioles, runners, and unripe and ripe fruits during vegetative propagation and reproductive growth. The contents of ellagic and gallic acids in the leaves of runner plants during vegetative propagation were $7.36{\pm}1.10$ and $5.07{\pm}3.66mg{\cdot}g^{-1}$ FW, respectively, and were higher than those in the other parts. The main volatile organic compound was identified as 3-hexen-1-ol, and it was mostly detected in leaves. The content of ellagic acid in leaves during reproductive growth was $12.96{\pm}2.30mg{\cdot}g^{-1}$ FW, while that in the other parts was below $6.00mg{\cdot}g^{-1}$ FW. The content of gallic acid in unripe fruits was $2.75{\pm}0.48mg{\cdot}g^{-1}$ FW and was higher than that in the other parts. Ripe fruits contained the lowest contents of ellagic and gallic acids but contained the most diverse volatile organic compounds, including sesquiterpenes, among the tested plant parts. The results indicate that non-edible parts (e.g., leaves and unripe fruits) of strawberry plants can be used as a raw material for antioxidant and anti-inflammatory agents, and edible parts (i.e., ripe fruits) can be available for making an essential oil.

• Membrane and Water Treatment
• /
• 제10권3호
• /
• pp.213-221
• /
• 2019

Anaerobic digestion (AD) has been widely used to valorize food waste (FW) because of its ability to convert organic carbon into $CH_4$ and $CO_2$. Korean FW has a high content of fruits and vegetables, and efficient hydrolysis of less biodegradable fibers is critical for its complete stabilization by AD. This study examined the digestates from different anaerobic digesters, namely Rs, Rr, and Rm, as the inocula for the AD of vegetable waste (VW) and cellulose (CL): Rs inoculated with anaerobic sludge from an AD plant, Rr inoculated with rumen fluid, and Rm inoculated with anaerobic sludge and augmented with rumen fluid. A total of six conditions ($3\;inocula{\times}2\;substrates$) were tested in serial subcultures. Biogas yield was higher in the runs inoculated with Rm than in the other runs for both VW (up to 1.10 L/g VS added) and CL (up to 1.05 L/g VS added), and so was biogas production rate. The inocula had different microbial community structures, and both substrate type and inoculum source had a significant effect on the formation and development of microbial community structures in the subcultures. The overall results suggest that the bioaugmentation with rumen microbial consortium has good potential to enhance the anaerobic biodegradability of VW, and thereby can help more efficiently digest high fiber-content Korean FW.

• 식물병연구
• /
• 제10권4호
• /
• pp.285-289
• /
• 2004

진한 적색과 이상 발효 증상을 나타내는 피수박은 막대한 경제적 손실을 주고 있다. 본 연구는 피수박의 발생 원인을 밝히기 위하여 이상 발효와 내생 세균과의 연관성을 검토하였다. 수박의 내생 세균 밀도는 정상 수박의 경우 $2.2{\sim}37.0{\times}10^3$ cfu/g fw에 불과하였으나 피수박의 경우는 $1.26{\sim}1.75{\times}10^6$ cfu/g fw로 정상 수박에 비해 밀도가 매우 높았다. 피수박에서 분리한 56균주에서 17균주가 피수박을 유발하였다. 피수박과 관련이 있는 세균은 대부분이 Gram 음성으로 호기성인 Pseudomonas spp.와 혐기성 세균이었다. 따라서 피수박은 Gram 음성인 내생 세균의 증식에 의한 이상 발효가 원인이라고 추정된다.

• Journal of Plant Biotechnology
• /
• 제35권2호
• /
• pp.127-132
• /
• 2008

In bioreactor cultures of plants, inoculum density is an important factor affecting growth and proliferation of the plantlets. To maximize shoot growth and proliferation of grape rootstock '5BB' in bioreactors, inoculum density varied at 15, 30, 45 and 60 single nodes in a 3-liter scale balloon type bioreactor, respectively and cultured for 40 days. Results suggested that the growth and the photosynthesis of the plantlet were greatly affected by inoculum density in the bioreactor. The inoculum density of 45 nodes resulted in the greatest growth (910.4 mg/shoot FW, 764.4 mg/root FW) followed by 30 nodes. $CO_2$ assimilation rate, stomatal conductance, transpiration rate of the plantlet were also highest at the inoculum density of 45 nodes. Significant reduces in shoot and root growth (426.5 mg/shoot FW, 248.4 mg/root FW) were observed at the inoculum density of 60 nodes. When the inoculum density decreased by 15 nodes, plantlets were malformed due to hyperhydricity, resulting in the highest transpiration rate and the lowest $CO_2$ assimilation rate. The plantlets stressed by the inoculum density at 15 nodes and 60 nodes showed larger number and irregular shape of stomata compared to the plantlets inoculated with 45 nodes.

• 한국해양학회지:바다
• /
• 제11권2호
• /
• pp.49-67
• /
• 2006

2004년 2월부터 8월까지 메조코즘을 이용하여 겟벌에 담수가 유입된 이후 갯벌 조간대에 조성된 인공방조제 내부 갯벌에서 일어나는 생지화학적 변화를 모의하였다. 이를 위해 먼저 세 개의 환경 조건을 조성하였으며, 이 중 두 환경은 담수를 유입하는 환경으로써, 교반 담수화 실험군(FW-M-T/C)과 미교반 담수 실험군(FW-NM-T/C)로_ 세분하였고, 나머지 하나는 해수 환경(SW-M-T/C)을 유지하였다. 초 봄에 교반 담수화 실험군과 미교반 담수 실험군(FW-NM-T)의 수주에 대하여 28일 만에 완전 담수화에 도달하였으며, 담수화 과정과 담수화 이후에 염분, 영양염 농도, 그리고 저서 생물의 종과 개체수 변화에 대해 지속적인 조사가 이루어졌다. 염분의 경우, 수층의 담수화속도에 비해 퇴적층의 공극수 내 염분 감소는 매우 느리게 진행되어 공극수 내 염분이 10 psu이하로 감소한 이후 5월 1일(담수 유입 63일 경과)과 5월 27일(91일 경과)사이에 저서 동물 생체량의 현저한 감소가 관찰되었는데, 주요 저서 동물인 이매패류는 $\frac{7}{8}$이 감소하였고, 다모류는 $\frac{2}{3}$가 감소하였다. 담수화로 인한 수질변화는 동절기에서 하절기로 계절이 바뀜에 따라 온도 상승에 의한 DO의 현저한 감소 현상이 관찰되었다. 이러한 현상은 교반 담수화 실험군 보다는, 특히 미교반 담수 실험군에서 더욱 뚜렷하게 나타났다. 또한 DIP의 경우도 여름철에 미교반 담수 실험군에서 훨씬 더 많은 양이 용출되었다. ${NO_3}^-$은 실험 전반에 걸쳐 수층에서 제거되는 것으로 나타났으며, 계절적으로는 늦은 봄부터 감소하기 시작하여 여름철에는 매우 낮은 농도 분포를 보였다. ${NH_4}^+$은 ${NO_3}^-$에 비해 실험 기간내내 매우 낮은 농도($\frac{1}{2}{\sim}\frac{1}{8}$이상)를 보였으며, 계절 변화에 따른 영향은 받지 않았다. 특히 완전 담수화 이후 해양 저서생물이 대량 폐사하면서 잠재적인 유기물 증가량이 많았던 늦봄과 그 이후의 여름철 동안에도 ${NH_4}^+$의 농도 증가 경향은 전혀 보이지 않았다. 실험 기간 동안 갯벌 퇴적물이 ${NO_3}^-$에 대해서는 제거지(sink)로써, 그리고 DIP에 대해서 잠재적인 공급원(source) 역할을 하고 있는 것으로 나타났다.

• 한국토양비료학회지
• /
• 제49권2호
• /
• pp.138-143
• /
• 2016

The objective of this study was to evaluate the effects of the application of vermicomposts on the growth parameters and ginsenoside content of ginseng roots. Food waste vermicompost (FW), cow manure vermicompost (CM), and paper sludge vermicompost (PS) were applied at 10 and $40t\;ha^{-1}$, respectively. One-year-old seedlings were transplanted and 4-year-old roots were harvested. Soil nitrate and phosphate concentrations were increased in the plots applied with FW and CM at $40t\;ha^{-1}$. Soil pH and exchangeable Ca concentrations were higher at FW $40t\;ha^{-1}$ than at CM $40t\;ha^{-1}$. Root yield increased when treated with FW $40t\;ha^{-1}$ in comparison to the yield for the control. The incidences of root rot disease and ginsenoside content were not significantly affected by the treatments. The results suggested that application of vermicompost might not show a relationship between root biomass and ginsenoside content. It further showed that proper use of vermicompost can promote root yield without a reduction in root quality or an increase in the incidence of root rot disease in reclaimed fields.