• 상하수도학회지
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• 제29권3호
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• pp.359-370
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• 2015

This study developed an up-flow wetland providing either an eco-friendly follow-up process of medium-sized public treatment facility for livestock manure or a non-point source pollution controller near livestock farms. The four bench-scale up-flow wetlands were operated with four different bed media sets. The removal efficiencies of the wetland effluent for CODCr, TN, TP, SS were 35.2 %, 29.5 %, 31.2 % and 52.2 % for set 1(Blank, without reed, with bio-ceramic), 40.6 %, 43.4 %, 42.2 % and 55.4 % for set 2(with bio-reed & without bio-ceramic), 45.2 %, 48.7 %, 46.6 % and 66.3 % for set 3(with bio-reed & bio-ceramic), 32.9 %, 27.3 %, 29.3 % and 54.1 % for Set 4(with reed & bio ceramic), respectively. The set 3 condition having a mixture of bio-reed and bio-ceramic showed the highest efficiency in the bench-scale evaluation. This study suggests a mixture of bio-reed and bio-ceramic as suitable bed media in the construction of artificial wetlands near livestock farms. Soils including the bed media were monitored during the evaluation for trace elements. Soil analysis results were satisfied with the Korean Soil Contamination Standard. This study showed that the up-flow constructed wetland was feasible to treat the effluent livestock wastewater treatment facility.

• 한국균학회지
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• 제48권3호
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• pp.273-284
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• 2020

본 연구에서는C. indica 자실체의 안정적인 대량생산에 기반이 되는 필수적인 균사체 생산을 위한 최적 배양조건을 구명 하고자하였다. C. indica 균사체의 효율적 배양을 위한 조건은 최적 배양 온도 30-32℃, pH 6.0, 탄소원 maltose 2%, 유기질소원 yeast extract 1%, 무기질소원 NaNO₃ 0.1%, 아미노산 asparagine 0.7%, 유기산 acetic acid 0.1%, 무기염류 MnSO₄ 0.7 mM가 최적 배양조건 이었다. 새로이 MYNA로 명명한 C. indica의 최적 배지는 기존의 PDA 배지보다 균사의 생장이 균일하고, PDA 배지의 배양기간과 비교하였을 때 10.5% 단축하는 효과가 있었다. MYNA 배지는 추후 C. indica의 재배에 널리 활용될 수 있을 것으로 판단된다.

• Preventive Nutrition and Food Science
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• 제9권4호
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• pp.374-382
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• 2004

The concern of the antioxidant micronutrient status in normal healthy people, including antioxidant trace minerals such as Cu, Zn, Mn, Fe and Se is focused since systemic oxidation is involved in various chronic diseases. In the present study, we evaluated the concentration of trace minerals (Cu, Zn, Mn, and Fe) which are considered as potential antioxidant minerals in plasma, red blood cells (RBCs) and urine in normal healthy Korean subjects. The 760 subjects (male 341, female 419; mean age 54.2 $\pm$ 18.9) were recruited from the rural, urban and metropolitan city in South Korea. Dietary intake was evaluated using 24-hours recall for general major nutrient intake assessment. The trace elements (Cu, Zn, Mn, and Fe) concentrations in plasma, RBCs, and urine were measured by inductively coupled plasma spectrophotometer (ICP) and atomic absorption spectrophotometer (AAS). Cu and Zn levels in plasma, RBCs and urine in normal healthy South Koreans were within the normal range of those mineral levels, but Mn and Fe levels were higher compared to the normal range of those mineral levels. None of the selected trace mineral levels in plasma and RBC's was lower than the normal range value. The results showed that Zn and Cu levels in plasma and RBC's in Korean were within the normal range, and plasma and urinary Mn and Fe levels were higher than the normal reference values. Potential antioxidant trace mineral (Cu, Mn, Zn and Fe) levels in Koreans are within or a bit higher than the normal range.

• Journal of Microbiology and Biotechnology
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• 제30권9호
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• pp.1310-1320
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• 2020

Low-quality soil for land reuse is a crucial problem in vegetation quality and especially to waste disposal sites in mining areas. It is necessary to find suitable materials to improve the soil quality and especially to increase soil microbial diversity and activity. In this study, pot experiments were conducted to investigate the effect of a mixed material of humic acid, super absorbent polymer and biochar on low-quality soil indexes and the microbial community response. The indexes included soil physicochemical properties and the corresponding plant growth. The results showed that the mixed material could improve chemical properties and physical structure of soil by increasing the bulk density, porosity, macro aggregate, and promote the mineralization of nutrient elements in soil. The best performance was achieved by adding 3 g·kg^-1 super absorbent polymer, 3 g·kg^-1 humic acid, and 10 g·kg^-1 biochar to soil with plant total nitrogen, dry weight and height increased by 85.18%, 266.41% and 74.06%, respectively. Physicochemical properties caused changes in soil microbial diversity. Acidobacteria, Bacteroidetes, Chloroflexi, Cyanobacteria, Firmicutes, Nitrospirae, Planctomycetes, and Proteobacteria were significantly positively correlated with most of the physical, chemical and plant indicators. Actinobacteria and Armatimonadetes were significantly negatively correlated with most measurement factors. Therefore, this study can contribute to improving the understanding of low-quality soil and how it affects soil microbial functions and sustainability.

• 생명과학회지
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• 제18권4호
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• pp.488-493
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• 2008

Phosphate, a favorable phosphorous form for plant, is one of major nutrient elements for growth and development in plants. Plants exhibit various physiological and biochemical responses in reaction to phosphate starvation in order to maintain phosphate homeostasis. Of them, expression of high affinity phosphate transporter gene family and efficient uptake of phosphate via them is a major physiological process for adaption to phosphate deficient environment. Although the various genetic resources of high affinity phosphate transporter are identified recently, little is known about their functions in plant that is prerequisite information before applying to crop plants to generate valuable transgenic plants. We demonstrated that Arabidopsis transgenic plants over-expressing two different high affinity phosphate transporter gens, OsPT1 and OsPT7, derived from rice, exhibit better growth responses compared with wild-type under phosphate starvation condition. Specially, OsPT7 gene has proven to be more effective to generate Arabidopsis transgenic plant tolerant to phosphate deficiency than OsPT1. Furthermore, the expression level of AtPT1 gene that is one of reporter genes specifically induced by phosphate starvation was significantly low compared with wild-type during phosphate starvation. Taken together, these results collectively suggest that over expression of OsPTl and OsPT7 genes derived from monocotyledonous plant function efficiently in the dicotyledonous plant, relieving stress response caused by phosphate starvation and leading to better growth rate.

• 한국식품영양학회지
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• 제30권5호
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• pp.1068-1079
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• 2017

This study was applied to the PCA (Primary Components Analysis) for the sixteen table setting at the 2017 Yeongju local food contest. In this contest, we have developed a seonbibansang and a temple one-dish meal. As a result of the correlation analysis, the applicability and composition were 0.7980, harmony and taste were 0.7747 and easiness and composition were 0.7435. In the Primary Component $Y_1$, all the variables $X_1{\cdots}X_{10}$ mean that the quality of the food had positive values greater than zero. The second Primary Component $Y_2$ has a large positive value while $X_4$, $X_5$, $X_6$, $X_7$, $X_9$ have negative values. $Y_2$ is a value representing the sanitation variable, and can be considered a traditional and characteristic table setting natural to the native food in Yeongju. In addition, we developed an-hyangbansang and seonmyoaecheong food content by applying PCA factors (the elements of harmony, ease and sanitation). Table setting of an-hyangbansang provided energy 61.5%, protein 20.0% and fat 18.5% and seonmyoaecheong provided energy 62.7%, protein 15.4% and fat 22.2%. This satisfied the necessary amount of caloric nutrient intake that could be provided in a meal. Especially through story-telling, a modern interpretation - or rebranding - of local and traditional foods could make these traditional food products familiar to consumers currently. The developed table setting is felt to be conductive to the possible commercialization and introduction of traditional food into the mainstream commercial food service industry.

• 한국환경농학회지
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• 제38권1호
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• pp.10-16
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• 2019

BACKGROUND: Coal ashes generated from thermal power plants have been known as beneficial materials for agricultural use because of their nutrient elements. However, there is limitation to recycle them due to their alkalinity. The objective of this study was to evaluate the effectiveness or safety of the coal ashes for their heavy metals on agricultural recycling when adjusted to pH of 5 with sulfuric acid. METHODS AND RESULTS: Concentration of hydrogen which is needed to adjust pH of coal ash was estimated by using a buffering curve and then the amount of sulfuric acid was changed by the estimation before incubation. Each of fly ash (FA) and bottom ash (BA) was collected from both thermal plants of Yeongdong (YD) and Yeongheung (YH). The pH values of coal ashes increased to 4.76 (from 4.34) after incubation with sulfuric acid for 56 days, closer to the targeted pH. Coal ashes also increased the contents of available phosphorus by 2-fold (165 mg/kg) and 11-fold (1,137 mg/kg) for YDBA and YDFA, respectively, compared to the control. CONCLUSION: The utilization of coal ash with its acidity regulation would be very beneficial to agriculture sector and further suggest promising environmental safety against heavy metals.

• 농업과학연구
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• 제50권4호
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• pp.713-721
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• 2023

Soil acidification challenges global food security by adversely influences soil fertility and agricultural productivity. Carbonized agricultural residues present a sustainable and ecofriendly way to recycle agricultural waste and mitigate soil acidification. We evaluated the effects of organic amendments on lettuce growth and soil chemical properties in two soils with different pH levels. Carbonized rice husk was produced at 600℃ for 30 min and rice husk was treated at 1% (w·w^-1). Carbonized rice husk increased soil pH, electrical conductivity, total carbon content, and nitrogen content compared with untreated and rice husk treatments. Furthermore, this study found that lettuce growth positively correlated with soil pH, with increasing soil pH up to pH 6.34 resulting in improved lettuce growth parameters. Statistical correlation analysis also supported the relationship between soil pH and lettuce growth parameters. The study findings showed that the use of carbonized rice husk increased the constituent elements of lettuce, such as carbon, nitrogen, and phosphate content. The potassium content of lettuce followed a similar trend; however, was higher in acidic soil than that in non-acidic soil. Therefore, improving the pH of acidic soil is essential to enhance agricultural productivity. It is considered advantageous to use agricultural residues following pyrolysis to improve soil pH and agricultural productivity.

• The Korean Journal of Ecology
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• 제25권3호
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• pp.189-195
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• 2002

생태계의 필수원소이고 대기오염의 주물질인 질소와 황의 유입량, 유출량과 연물질 수지를 밝히기 위하여 집수역의 특성이 알려지고, 수문학 연구시설이 구비된 산림청 임업연구원 중부시험장내 광릉시험림의 침엽수림과 활엽수림 소유역 생태계에서 강수량과 유출수량을 측정하고, 이 속에 있는 두 물질의 함량을 분석하고 이를 수문학적 자료와 통합하였다. 광릉의 연평균 강수량은 $12,916\;ton{\cdot}ha^{-1}{\cdot}yr^{-1}$이었고, 연평균 유출량은 각각 5,094(39%)와 $7,467\;ton{\cdot}ha^{-1}{\cdot}yr^{-1}$(59%)로서 침염수림이 활엽수림보다 더 낮았다. 강수에 의한 $N({NO_3}^-+{NH_4}^+)$와 ${SO_4}^{2-}$의 연 평균 유입량은 각각 12.50과 $81.72\;kg{\cdot}ha^{-1}{\cdot}yr^{-1}$ 이었다. 유출수를 통하여 생태계로부터 유출되는 $N({NO_3}^-+{NH_4}^+)$와 ${SO_4}^{2-}$의 유출량은 침엽수림소유역에서 각각 0.06과 $39.23\;kg{\cdot}ha^{-1}{\cdot}yr^{-1}$이었고, 활엽수림소유역에서 각각 0.15, $55.46\;kg{\cdot}ha^{-1}{\cdot}yr^{-1}$로서 질소와 황은 생산성이 높은 천이초기 단계에 있는 침엽수림이 극상단계에 있는 활엽수림 소유역보다 적었는데 이는 물질생산에 의하여 이들 물질이 생물체의 조직에 축적되었음을 시사하였다. 이 결과로부터 계산한 $N({NO_3}^-+{NH_4}^+)$와 ${SO_4}^{2-}$의 연수지는 침엽수림소유역 에서 각각 +12.46, $+42.49\;kg{\cdot}ha^{-1}{\cdot}yr^{-1}$ 활엽수림소유역에서 각각 +11.35, $+26.26\;kg{\cdot}ha^{-1}{\cdot}yr^{-1}$로서 두 생태계에 축적되었다.

• 화훼연구
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• 제18권4호
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• pp.238-243
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• 2010

본 연구는 직삽 양액재배에 의한 '백마' 품종의 줄기공동화를 경감하고 절화품질 향상시키고자 양액 pH조정 비료종류와 에세폰 살포 효과를 알아보고자 실시하였다. 양액 pH조정 비료종류에 따른 pH 경시적 변화는 수산화칼륨 처리에서 pH 5.65에서 시작하여 큰 변화 없이 안정적으로 유지되었다. 화아분화기 이후 양액 pH조정 비료종류에 따른 절화장, 엽수, 절화중, 및 꽃잎수는 수산화칼륨 처리가 가장 좋았다. 중탄산칼륨처리는 경경이 두껍고 내벽이 두꺼워 동공의 크기와 면적이 가장 적었으나, 생육과 절화품질이 가장 좋은 수산화칼륨 처리구에서는 동공이 다소 큰 경향이었다. 화아분화기 이후 양액 pH조정에 따른 양분 흡수변화는 중탄산칼륨 처리는 전질소, 인산, 칼륨 및 칼슘의 흡수가 가장 적게 일어나 순환식 양액탱크내 잔류량이 가장 많은 반면 수산화칼륨의 경우 전질소, 인산, 칼륨 및 칼슘의 순환식 양액탱크내 잔류량이 적어 식물체내로 일정하게 흡수되도록 하여 생육 및 절화품질을 향상시킨 것으로 생각되었다. 에세폰 엽면 살포의 농도와 시기에 따른 생육은 관행(무처리)에 비해 500배 처리에서는 생육억제가, 1,000배와 2,000배 처리에서는 생육촉진 효과가 나타났다. 꽃잎수는 관행 302매에 비해 1,000배 개화 45일전 처리가 331개/송이로 가장 많게 나타났다. 에세폰 처리에 따른 줄기동공은 관행에 비해 2,000배 개화 30일전 처리가 크기 1.0 mm, 면적이 7% 정도 더 적은 것으로 나타났다. 따라서 국화 '백마' 양액 재배시 화아분화기 이후 수산화칼륨을 이용하여 양액 pH를 안정화시키고 에세폰 2,000배액을 개화 30일전 처리하여 줄기동공 크기를 감소시킴으로써 생육 및 절화품질향상을 도모할 수 있을 것으로 생각되었다.