• 한국지반환경공학회 논문집
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• 제13권4호
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• pp.37-44
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• 2012

본 연구는 모래, HAP, Zeolite, 혼합여재에 의한 비점오염원 흡착 반응을 조사하였다. 오수에 대한 모래, HAP, Zeolite와 혼합여재의 흡착은 연속적인 회분식 실험을 통해 조사하였다. 회분식 실험 후 COD, T-N, T-P를 통하여 분석하였다. kinetic model은 유사 1차반응을 통해 분석하였다. Langmuir와 Freundlich isotherm model을 사용하여 적용성을 조사하였다. COD 최대흡착량$(Q_{max})$의 값은 각각 모래 0.0511mg/g, HAP 0.1905mg/g, Zeolite 1.0366mg/g, Mixed media 0.7444mg/g T-N 최대흡착량$(Q_{max})$의 값은 각각 모래 0.0159mg/g, HAP 0.0537mg/g, Zeolite 0.5496mg/g, Mixed media 0.1374mg/g T-P 최대흡착량$(Q_{max})$의 값은 각각 모래 0.0202mg/g, HAP 0.1342mg/g, Zeolite 0.0462mg/g, Mixed media 0.1180mg/g 나타났다. 결과적으로 혼합여재는 비점오염원을 효과적으로 제거하였다.

• 생물환경조절학회지
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• 제2권1호
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• pp.9-15
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• 1993

양액재배시 배지 및 양액종류의 차이가 백경채, 탑채, 상추, 쑥갓 및 잎들깨의 생육에 미치는 영향을 구명하고자 실시한 실험의 결과는 다음과 같다. 1. 전반적으로 순수담액처리구와 혼합상토의 생육이 크게 차이나지는 않았으나 순수담액처리구의 생육이 가장 양호하였고, 모래배지에서의 생육이 가장 저조하였다. 백경채, 탑채, 상추와 잎들깨의 생육은 순수담액의 산기양액처리구에서 가장 좋았으며 쑥갓의 경우 양액종류에 관계없이 순수담액처리구에서 생육이 양호하였다. 2. 엽록소의 상대적 함량은 처리간에 큰 차이가 없었다. 3. Vitamin C의 함량은 처리구간에 차이가 크지 않았으나 공시작물 공히 전반적으로 양액의 종류에 상관없이 혼합상토처리구가 가장 높았고, 모래배지가 가장 낮았다. 그러나 잎들깨에서는 모래배지와 순수담액배지간에 차이가 없었다.

• 한국환경복원기술학회지
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• 제12권3호
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• pp.21-32
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• 2009

Coastal sand dune area is the important ecosystem as an ecotone which located between coastal area and terrestrial area. Moreover, it is very complicate landscape that have geomorphological interaction between erosion and accumulation of sand. Therefore, it is necessary to understand the sand dune ecosystem in view point of landscape scale including background landscape affecting origin of sand dune. Landscape ecological approach in the complicate ecosystem already started in developed countries, and it is applied to land management and biodiversity conservation strategies even in national scale. In this paper, landscape ecological analysis using landscape pattern analysis was carried out on 7 study areas (Yellow Sea : Hakampo and Doksan, South Sea : Namyeol and Balpo, East Sea : Hosan, Hupo and Goraebul) in Korean coastal sand dune ecosystem. Landscape elements were composed by 9 elements in these study areas. Major background landscape elements was the forest land and agricultural field. Namyeol (S06) has larger patch landscape compare to other areas. In patch shape indices, Hupo (E10) shows more complicate patch shapes. The high landscape heterogeneity showed in the Doksan sand dune area and that of Hosan. It shows that these areas were composed by various patch types. However, using landscape indices have to use very carefully because several variables have influence to the result such as scale and spatial pattern of study areas. Although landscape analysis through landscape indices shows sometimes difficult to explain the ecosystem, landscape scale approach on ecosystem assessment still useful to interpret in ecological process in large range of habitat.

• 한국유기농업학회지
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• 제8권1호
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• pp.79-88
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• 1999

In order top investigate the growth of water dropwort grown by sandculture irrigated with recirculated tilapia aquaculture water, these experiments were carried out. Fish(tilapia) production and biofiltration provided by sand cultured water dropwort(Oenanthe stolonifera DC.) were linked in a closed system of recirculation water. Water dropwort was irrigated with water drawn from the tilapia tank and drainage from sand beds was returned to the fish tank. The temperature, pH and EC of tilapia culture water were stable. The growth of water dropwort grown by sandculture with aquaculture water was normal. Microbial activity of the biofilterbed irrigated by tilapia rearing water was higher than that of biofilterbed irrigated by tapwater. The feasibility of an integrated, recirculatory system for concurrent production of water dropwort and fish with no additional fertilization application was demonstrated.

• ALGAE
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• 제37권4호
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• pp.293-299
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• 2022

To examine the effects of substratum types on the growth of Caulerpa okamurae, sand surface and sand burial experiments were conducted. Five assimilators (erect fronds) per replicate were cultured for 15 d on the surface of three different treatments: fine sand (200 ㎛), coarse sand (600 ㎛), and no sand (control). Also, three stolons and three assimilators were buried by fine grain or coarse grain sands and incubated for 15 d. In both experiments, other culture conditions included 25℃, 30 μmol photons m^-2 s^-1, and 16 : 8 h L : D (light : dark). In both experiments, stolon + assimilator-, assimilator-, and stolon-weights were measured. Relative growth rates (RGRs) of stolon + assimilator weights ranged from 0.43 to 1.95% d^-1 at no sand and fine sand treatment, respectively. RGRs for the weight of stolon + assimilator and new assimilators were significantly greater on the fine- and coarse sand surface than the control. In the burial experiments, RGRs of stolons (4.28% d^-1 at coarse sand and 5.57% d^-1 at fine sand, respectively) were significantly greater than those of assimilators (1.38% d^-1 at fine sand and 1.82% d^-1 at coarse sand, respectively). When stolons were buried, RGRs for assimilators were greater at the fine sand than at the coarse sand treatment. On the other hand, RGRs of buried assimilators for total frond weights and for newly produced stolons were significantly greater at the coarse sands than at the fine sands. In conclusion, C. okamurae grew well with all substrates of sands and showed better growth on fine sands than coarse ones. This result suggests that the growth of stolons and assimilators of C. okamurae is stimulated after stable attachment to the sand substrates by rhizophores. In addition, stolons showed higher growth rates than the assimilators in the sand burial states, indicating that stolons are more tolerant to low light than assimilators of C. okamurae.

• 한국수산과학회지
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• 제49권6호
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• pp.792-799
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• 2016

We isolated seven tryptamine-producing bacteria from commercial salted and fermented sand lance (Ammodytes personatus) sauces using an L-tryptophan decarboxylating medium. These tryptamine-producing bacteria, identified using an API kit and 16S rRNA analysis, included Lysinibacillus xylanilyticus (one strain), Lysinibacillus fusiformis (four strains), and Staphylococcus epidermidis (two strains). Lysinibacillus spp. produced the highest levels of tryptamine in culture broth containing 0.5% L-tryptophan, compared with 1.0% and 2.0% preparations. After 72 h of incubation, Staphylococcus epidermidis produced the highest levels of tryptamine ($60.50{\mu}g/mL$ and $664.86{\mu}g/mL$) in culture broth containing 2.0% L-tryptophan. While Lysinibacillus spp. comprised the dominant tryptamine-producing bacteria in sand lance sauces, Staphylococcus epidermidis also showed high tryptamine-producing activity. This is the first report on the isolation and identification of tryptamine-producing bacteria in sand lance sauces.

• 한국자원식물학회지
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• 제19권4호
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• pp.517-520
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• 2006

봉의꼬리에 있어서 생육은 일반상토인 모래: 마사토 : 부엽토(2:5:3)와 피트모스 : 이끼(5:5) 조합에서 많았으므로 인공상토로는 피트모스에 이끼를 덮은 조합이 유리한 것으로 나타났다. 도깨비고비의 경우에는 전체적으로 배양토 적응성이 높게 나타났으며 역시 피트모스 : 펄라이트(7:3) 조합에서 생육량이 가장 많았다. 그러나 바크와 톱밥이 들어간 배양토에서는 생육이 저조하였다. 부싯깃고사리의 경우 초장과 엽수의 생육으로 볼 때 모래 : 마사토 : 부엽(2:5:3) 조합이 가장 크고 많았으며 그 다음이 피트모스 : 펄라이트(7:3, 5:5) 조합 순이었다.

• 한국엔터테인먼트산업학회논문지
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• 제14권7호
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• pp.409-419
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• 2020

이 연구는 평생교육 분야에서 관심이 높아지고 있는 샌드아트 기법의 학습자 흥미 유발 요인과 교육적 효과를 제시하는데 주안점을 두고 K샌드아트 평생학습 전문강사 동아리를 사례로 선정하였다. 첫째, 학습자의 흥미 유발 효과를 높이는 요인은 샌드아트 기법을 모래 놀이로 인식, 이야기와 음율, 샌드박스에 그리며 표현해보는 활동, 학습자의 관심 주제를 표현하도록 하는데 있다. 둘째, 평생교육 분야에서 샌드아트 기법은 교육적으로 심리치료, 집중력 향상, 자신감 향상, 표현력과 창의력 개발, 오감 발달에 효과가 있다. 셋째, 평생교육 분야에서 샌드아트 기법은 전 세대에게 적용되고 있으며, 평생교육 6진 분류 중 시민참여교육, 기초문해교육, 문화예술교육에 샌드아트 기법을 활용하면 효과를 높일 수 있다. 넷째, 향후 과제로는 샌드아트 전문가 양성 지원, 샌드아트 재료 및 장비 지원, 다양한 대상을 찾아가는 샌드아트 프로그램을 확산해야 할 것이다.

• 복식문화학회:학술대회논문집
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• 복식문화학회 2003년도 동계 세미나 및 논문 디자인 콘테스트 시상 수상작품 전시회
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• pp.21-26
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• 2003

I 의류의 염색 및 가공 1. 염색 방법 (섬유제품에 의한 분류) ① 섬유 염색 (Fiber Dyeing) ②사염 ③ 원단 염색 ④ 의류 염색 2. 염료 종류에 따른 염색 (Cellulose 섬유를 중심으로) ① 직접 염료에 의한 염색 ② 반응성 염료에 의한 염색 ③ VAT 염료에 의한 염색 ④ Pigment Dyeing ⑤ 형광 증백제에 의한 염색 3. Washing 가공 ① Normal Washing ② Stone Washing ③ Bio Washing ④ Acid Washing ⑤ Sand Washing (중략)

• 한국양식학회:학술대회논문집
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• 한국양식학회 2003년도 추계학술발표대회 논문요약집
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• pp.126-126
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• 2003

Performance of a laboratory scale closed seawater recirculating aquaculture system was evaluated. Twenty-kg Korean rockfish (130 fish) with an average body weight of 153.8 g was stocked. Over 107-day culture period, fish reached final density of 51.7 kg/m$^3$ (initial density, 33.3 kg/m$^3$) on the culture tank volume basis. On a daily basis, water addition was 3.4% of the total water volume in the system. Total ammonia nitrogen (TAN)concentrations were below 1 mg/L and nitrite nitrogen (NO$_2$-N) concentrations were within the range of 1-3 mg/L on most sampling days. TAN was removedin bead and sand filters and it was removed or produced in the sedimentation basin. Basically, NO$_2$-N was removed in the bead and sand filters while it was either removed or produced in the sedimentation basin. Nitrate nitrogen (NO$_3$-N) was produced in the bead filters and removed in the sand filter and sedimentation basin. Foam fractionator performed well in the recirculating system. The maximal daily removal values for total suspended solids (TSS) and protein were 10,9 g and 1.4 g, respectively. Whole water quality parameters were within the levels commonly recommendedfor fish culture on most of the sampling days. However, further studies are needed to evaluate the commercial feasibility of this system because of the small-scale system used in present experiment. At least, present study still provides some basic information for further studies of this kind of system.