• 한국환경복원기술학회지
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• 제14권5호
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• pp.53-67
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• 2011

The major objective of this study was to quantify the effects of substrate depth and substrate composition on the development of sedum etc., in a sloped rooftop (6 : 12 pitch) environment during a 4-year period. The experiment was conducted from 2006 October to 2010 December under several conditions without soil erosion control : two substrate depth (5cm, 10cm), four substrate composition (A5N3C2, A3N3C4, A6C4, G5L3C2: A: artificial lightweight soil, N : natural soil, G : granite decomposed soil, C : leave composite, L : loess), four sloped roof direction ($E40^{\circ}W$, $W40^{\circ}N$, $S40^{\circ}W$, $N40^{\circ}E$). In this experiment 4 sedum etc., were used: Sedum sarmentosum, Sedum kamtschaticum, Sedum rupestre, Sedum telephium, flowering herbs (mixed seed : Taraxacum platycarpum, Lotus corniculatus, Aster yomena, Aster koraiensis), western grasses (mixed seed : Tall fescue, Creeping redfescue, Bermuda grass, Perennial ryegrass). The establishment factor had two levels : succulent shoot establishment (sedum), seeding (flowering herbs, western grasses). 1. Enkamat, as it bring about top soil exfoliation, was unsuitable material for soil erosion control. 2. Sedum species exhibited greater growth at a substrate depth of 10cm relative to 5cm. All flowering herbs and western grasses established only at a substrate depth of 5cm were died. A substrate depth of 5cm was not suited in sloped rooftop greening without maintenance. If additional soil erosion control will be supplemented, a substrate depth of 10cm in sloped rooftop greening without maintenance was considered suitable. 3. For all substrate depth and composition, the most abundant species was Sedum kamtschaticum. The percentage of surviving Sedum kamtschaticum was 73.4% at a substrate depth of 10cm in autumn 2007 one year after the roof vegetation had been established. But the percentage of surviving other sedum were 33.3%~51.9%, therefor mulching for soil erosion control was essential after rooftop establishment in extensive sloped roof greening was proved. To raise the ratio of plant survival, complete establishment of plant root at substrate was considered essential before rooftop establishment. 4. There was a significant interaction between biomass and substrate moisture content. There were also a significant difference of substrate moisture and erosion among substrate composition. The moisture content of A6C4 was highest, the resistance to erosion of A5N3C2 was highest among substrate composition. The biomass of plants were not significantly higher in A5N3C2 and A6C4 relative to A3N3C4 and G5L3C2, For substrate moisture and erosion resistance, A5N3C2 and A6C4 were considered suitable in sloped rooftop greening without maintenance. 5. There were significant difference among roof slope direction on the substrate moisture. Especially, the substrate moisture content of $S40^{\circ}W$ was lower relative to that of $N40^{\circ}E$, that guessed by solar radiation and erosion.

• 한국약용작물학회지
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• 제20권3호
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• pp.177-183
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• 2012

To develop the practical cultivation for paddy field, we investigated the properties of paddy soil, growth characteristics and ginsenoside content of 6-year-old ginseng, Cheonpung variety between poor drainage class (PDC) and imperfect drainage class (IDC). Groundwater level in PDC showed monthly small changes of 20~30 cm, while IDC showed monthly great changes of 28~71 cm depending on rainfall. Soil moisture content in PDC and IDC was 17.2%, 22.5%, respectively. Air temperature in IDC was lower than $0.3^{\circ}C$, while soil temperature was higher than $0.8^{\circ}C$ compare to PDC, respectively. Main soil color of PDC was grayish olive, while IDC was brownish olive. PDC showed yellowish mottles only at underground of 20~40 cm, while IDC showed that at underground of 30~90 cm. IDC showed lower pH, EC, potassium, calcium and magnesium content, but higher organic matter, phosphate, and iron content than that of PDC, respectively. All of EC, organic matter, potassium, calcium, and magnesium content were decreased, but iron content was increased at the subsoil layers of PDC. All of EC, organic matter, phosphorus, and potassium content were decreased, but calcium and magnesium content were increased at the subsoil layers of IDC. Root yield in IDC was more increased by 33% than that of PDC. The moisture content and rusty ratio of ginseng root in IDC were lower than that of PDC. Ginsenoside content in IDC was higher than that of PDC because the ratio of lateral and fine root showing relatively high content of ginsenoside was higher in IDC than that of PDC.

• 한국생활과학회지
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• 제21권2호
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• pp.377-388
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• 2012

The purpose of this study was to determine the content attributes and sensory characteristics of ice cream flavored with lotus leaf and seeds (Nelumbo nucifera Gaertner). Analysis of freeze dried lotus leaf powder produced the following technical results: Freeze dried lotus leaf powder contained moisture 12.2, crude protein 5.9, crude fat 1.2, crude ash 7.0, crude fiber 13.4g/100mg; raw lotus seed powder contained moisture 65.0, crude protein 8.2, crude fat 0.3, crude ash 1.0, crude fiber 10.8g/100mg; freeze dried lotus seed powder contained moisture 14.0, crude protein 17.1, crude fat 1.9, crude ash 4.0, crude fiber 2.8g/100mg. Lotus seed was processed by 4 methods: freeze dried, roasted, freeze dried peeled inner layer, cooked cut peeled inner layer. Analysis of the color value produced the following technical results: freeze dried lotus leaf powder were L(lightness) 14.5, a(redness) 4.4, b(yellowness) 24.0; freeze dried lotus seed powder L 57.3, a 14.4, b 12.0; roasted lotus seed powder L 52.7, a 22.5, b 11.9; freeze dried lotus seed peeled inner layer L 60.0, a 1.4, b 12.3. Proportional lotus ingredients used for ice cream were 1%, 3%, 5%, 7%, 10% for lotus leaves and 1%, 3%, 5% for lotus seeds. The maximum over run ratio for lotus leaf ice cream was 45.3~56.9% at 20~25 minutes operating time. Over run was significantly decreased by increasing the contents of lotus leaf powder. A maximum over run ratio for lotus seed ice cream was 46.1~54.3% at 20~25 operating time. Over run was not significantly different based on content of lotus leaf versus lotus seed. Sensory evaluation of lotus leaf ice cream produced the following results: the highest score was for color of 4.42 and the lowest score was for sweetness of 3.30. The total mean score significantly decreased by increasing the content of lotus leaf powder. Sensory evaluation of lotus seed ice cream produced the following results: the highest score was for cooked cut peeled inner layer type and the lowest was for freeze dried type 3.86. The sensory scores were not significantly different based on the content of lotus seed. Texture was evaluated highest with a rating of 4.21 and the taste was evaluated lowest with a rating of 3.68 For whole evaluation. This study concluded that lotus leaf ice cream demonstrates relative strength in terms of color and taste, and a relative weakness in terms of over run and sweetness. Suitable content of lotus leaf ranged from 1~5%. The lotus seed processed by the cooked cut peeled inner layer method received a higher rating than dried powder for lotus seed ice cream.

• 한국작물학회지
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• 제57권3호
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• pp.301-309
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• 2012

본 연구는 식미가 우수한 쌀 품종 개발을 위한 기초 연구로써 경상북도 지역에서 시판되고 있는 브랜드 쌀 33종을 품종별로 분류하여 이화학적 특성, 외관적 품위 특성, 취반 후 물성 및 식미치 분석을 통하여 식미 관련 요인들을 비교 검토하였다. 1. 시판 브랜드 쌀 33종의 아밀로오스 함량은 17.04-17.98% 이었다. 품종별로 보면, 남평벼의 아밀로오스 함량이 가장 낮았으며 새추청벼가 가장 많은 아밀로오스를 함유하고 있었다. 33종 브랜드 쌀의 단백질 함량은 6.72-7.55%로, 일품벼, 히토메보레, 추청벼 및 새추청벼의 단백질 함량은 유의적 차이가 없었으며, 남평벼의 단백질 함량이 가장 높았다. 33종 브랜드 쌀의 수분 함량은 13.08-14.83%의 범위에 있었으며, 5 품종 중에서 새추청벼, 남평벼의 수분 함량이 가장 낮았으며, 히토메보레와 추청벼의 수분 함량이 높았다. 2. 시판 브랜드 쌀의 완전미 비율은 추청벼, 새추청벼 및 일품벼가 90% 이상으로 양호한 편이었다. 이 중 추청벼가 92.42%로 가장 높아 외관상 품질이 가장 좋은 것으로 나타났으나, 밥맛이 좋다고 알려진 일본쌀에 비해서는 수치가 낮아 쌀 재배부터 수확 후 저장까지 통합적이고 지속적인 관리 방안이 필요하다. 3. 시판 브랜드 쌀 33종 중에서 추청벼와 남평벼의 경도가 낮았으며, 히토메보레, 새추청벼 및 일품벼의 경도가 높았다. 부착성은 히토메보레와 남평벼가 낮았으며, 추청벼가 가장 높은 수치를 보였다. 4. 시판 브랜드 쌀 33종의 기계적 식미치는 일품벼, 남평벼와 새추청벼에서 낮게 나타났으며, 추청벼가 가장높은 식미치를 보였다. 이를 앞서 분석한 이화학적 성분, 취반 물성 특성 및 외관 품질 특성 결과와 종합해보면, 단백질 함량은 높고, 수분 함량은 낮은 새추청벼과 남평벼 품종이 식미치가 낮은 반면, 단백질 함량과 경도가 낮으며, 수분 함량과 부착성 및 완전미 비율이 높았던 추청벼 품종의 식미치가 높게 나타났다. 5. 브랜드 쌀의 이화학적 성분, 외관상 품위, 취반 물성 및 식미치 간의 상관관계를 분석한 결과, 기계적 식미치는 조직감, 수분 함량 및 완전미 비율과는 정의관계를, 단백질 함량과는 부의 상관관계를 보여 쌀에 함유된 단백질 함량이 낮으며 수분 함량과 완전미의 비율이 높을수록 식미치가 높아지는 특성을 보였다. 이러한 결과를 바탕으로, 본 연구에서 사용한 시판 브랜드 쌀 33종 중에서는 추청벼 품종이 대표적인 식미 우수품종으로 나타났다.

• Computers and Concrete
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• 제19권1호
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• pp.69-78
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• 2017

This study aimed at exploring the effect of presoaking degree of lightweight aggregate (LWA) on the fresh and hardened properties of concrete. Two series (i.e., Series A and Series B) of concrete mixes that were made of LWA with different moisture states were prepared. The presoaking degree of LWA was divided into three types: oven dry state, 1 hour prewetted and 24 hours prewetted. For the Series A, the water content of the lightweight aggregate concrete (LWAC) mixes was adjusted in accordance with the moisture condition of the LWA. Whereas the amount of water added in the Series B mixes was deliberately not adjusted for the moisture condition of the LWA. Slump test, mechanical tests, interfacial transition zone microscopical tests and thermal conductivity test were carried out on the specimens of different concretes and compared with control normal-weight aggregate concretes. The test results showed that the effect of mixing water absorption by LWA with different moisture states was reflected in the fresh concrete as the loss of mixture workability, while in the hardened concrete as the increase of its strength. With the use of oven-dried LWA, the effect of reduction of water-cement ratio was more significant, and thus the microstructure of the ITZ was more compact.

• 한국산림과학회지
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• 제4권1호
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• pp.33-38
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• 1965

It has already been noted that some tree species, denoted as tolerant species, endure to behavior shadiness in growth than those species, denoted as intolerant species, since this fact of tolerance must be involved in silvicultural practice, the present author, with pinus rigida, pinus Thunbergii, and Buxus koreana, investigated the relation of degree of shadiness to soil moisture condition. Because tolerant and intolerant trees must be considered from the standpoint of their ability to use any of the factors that are likely to be at low concentration in the dense or open forest. The observed results may be summarized as follows : 1. The ability of tolerance of the species to shadiness is differently concluded by the base with which the analysis was made, i.c. Height, growth, diameter growth, T-R ratio or dry matter increase and so on. Regarding this point root collar increment or dry matter increase were considered more reasonable bases for discussing the tolerability. 2. When total length growth, including both stem and root, is taken as standard for the comparison of the ability of tolerance for each species, higher soil moisture condition and thicker shadeniss lessened the ability of pinus rigida, seedlings. Pinus Thunbergii, showed. However more moisture resistant than pinus rigida. Buxus koreana, seemed to have stronger ability of tolerance than any others. 3. When total dry matter content taken as standard, the results obtained are given in Fig, 3. In pinus rigida, the soil moisture supplemented the lack of light.

• 한국식품조리과학회지
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• 제6권3호통권12호
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• pp.51-66
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• 1990

Six bands of domestic and American mayonnaises, four brands of Japanese mayonnaise and one home made mayonnaise were analyzed for chemical and fatty acid and sterol compositions. The results obtained as follows; 1. Moisture content was observed $13.3{\sim}22.4%$ of total samples, but H and L samples of American mayonnaise was observed 54.4 and 62.3% for the purpose of low caloried products. 2. Linoleic and linolenic acid were 50.3 and 7.9% and P/S ratio was observed $3.50{\sim}4.32$ over ideal ratio. 3. Cholesterol contents in O and N samples of Japanese mayonnaise were 166.07 mg/100 g product, 155.89 mg/100 g product. These figures are 3 times of domestic samples, and 4.8 times of American samples. Cholesterol content in home made mayonnaise was 90.75 mg/100 g product. 4. Little variation in stigmasterol content was observed among the brands of mayonnaise in contrast there was wide variation in sitosterol content ranged from 38.37 mg/100 g product to 409.16 mg/100 g product.

• 한국식품과학회지
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• 제22권4호
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• pp.451-455
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• 1990

본 실험은 압출성형 공정을 이용하여 돈피스낵의 제조에 필요한 가공특성을 조사하고자 실시하였다. 주원료인 돈피에 옥수수가루를 첨가하여 중량비로 1 : 2, 1 : 1, 2 : 1, 3 : 1로 혼합하고 각 혼합물의 수분함량을 5, 10, 15%되도록 건조시켰다. 이 혼합물들을 single screw extruder를 사용하여 주 스크류 회전속도를 고정하고 압출시킨 extrudate의 가공 및 압출성형 특성은 다음과 같다. 돈피와 옥분혼합물의 팽화율은 돈피:옥분=1 : 1의 배합비에서 수분함량 5%구가 가장 높았으며, 혼합물 중 돈피의 함량이 증가될수록 조밀도, 수분흡착력, 절단력과 적색도가 증가하였고, 명도와 황색도는 감소하였다. 이상의 결과에서 돈피 : 옥분의 원료혼합비율이 1 : 2와 1 : 1에서의 extrudate는 팽화된 돈피스낵을 제조하기에 만족스러운 원료배합비를 보여주었다.

• 한국토양비료학회지
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• 제44권5호
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• pp.878-886
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• 2011

본 연구에서는 레이더파 편파 차이비율에서 얻어진 밴드별 Polarimetric Discrimination Ratio (PDR)와 콩 생육인자 및 토양수분과의 관계를 분석하고 PDR를 이용하여 콩 생육 및 토양수분을 추정하고자 하였다. 기후 등의 영향을 받지 않고 10분 단위로 레이더 산란 측정을 할 수 있는 L, C, X-밴드 레이더 산란계 자동측정시스템을 이용하여 PDR와 콩 생육인자 변화를 모니터링 하였다. 콩 생육시기에 따른 밴드별 PDR과 콩 생육인자 변화를 관측한 결과 L-밴드 PDR이 C-, X-밴드 PDR보다 높게 나타났고, 밴드별 PDR이 가장 높게 보인 시기는 L-밴드PDR (DOY 271), C-, X-밴드 PDR (DOY 273)로 거의 일치하였고, 엽면적지수, 식생수분함량, 생체중, 초장 등 콩생육인자들도 동일한 경향을 보였는데 콩 파종 이후 증가하다가 9월 27일 (DOY 270)에 최대값을 보인 후 감소하였다. 하지만 토양수분은 콩 생육인자들과 다른 경향을 보였다. 생육기간동안 토양수분의 변이가 컸고 PDR과 상관성 도 높지 않았다. 하지만 엽면적지수가 2이하 일 때 콩PDR이 증가함에 따라 토양수분도 증가하는 경향을 보였다. 밴드별 PDR과 콩 생육인자와의 상관관계를 분석하였다. L-밴드 PDR에서 생체중 (r=$0.96^{***}$), 엽면적지수 (r=$0.91^{***}$),식생수분함량 (r=$0.94^{***}$), 토양수분 (r=$0.86^{**}$)등 모든 콩생육인자들과 상관계수가 가장 높게 나타났다. C-, X-밴드 PDR에서도 토양수분을 제외한 다른 인자들과 대체로 상관성이 높았다 ($r{\geq}0.83$). 전체 생육기간에서 PDR과 토양수분과의 상관성은 낮았지만 엽면적지수 2 이하 일 때(DOY 220) 모든 밴드에서 PDR과 토양수분과의 상관계수가 전체 생육단계에서 조사한 것 보다 높게 나타났다. 콩 생육인자들과의 상관분석에서 상관계수가 가장 높은 L-밴드 PDR를 이용하여 콩 생육인자 추정을 위한 회귀식을 작성하고 생육인자 실측값과 추정값을 비교하였다. L-밴드 PDR과 생육인자들과의 관계를 비교해 본 결과 생체중 ($L^2$=0.95), 엽면적지수 ($L^2$=0.89), 식생수분함량 ($L^2$=0.93)에서 결정계수가 높게 나타났고 생육인자 실측값과 추정값을 1:1 선상에서 비교해 본 결과 작은 오차를 보여 추정모형의 유효성이 높다는 것이 증명되었다. 본 연구를 통해 PDR를 이용하여 콩 생육 및 토양수분을 추정할 수 있는 가능성을 확인하였다.

• 한국건설순환자원학회논문집
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• 제7권1호
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• pp.57-65
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• 2019

본 연구에서는 알루미나 시멘트를 활용한 이끼 판넬을 제조하기 위하여 판넬의 모재료의 품질특성을 평가하였으며, 생물학적 특성 및 이끼가 착근된 이끼 판넬의 환경영향 특성을 평가하였다. 이끼 판넬의 모재료로 사용하기 위한 기본 배합비는 선행연구를 통하여 W/B 10%, Vs/Vm 20% 및 기포제 0.5%를 선정하였으며, 판넬의 보습성 향상을 위하여 SAP를 첨가하였다. SAP의 적정 혼합비는 품질특성을 고려하여 0.5% 미만으로 사용하는 것이 적합한 것으로 나타났다. 또한 알루미나 시멘트의 사용을 통하여 판넬의 pH를 10~11 수준으로 낮출 수 있었다. 판넬은 기포제를 통하여 표면 거칠기를 향상시킬 수 있었으며, SAP를 통하여 판넬의 보습성 향상효과가 있음을 확인하였다. 이끼 판넬의 환경영향 특성의 경우 이끼 판넬은 이산화탄소 저감성능 및 미세먼지 정화성능을 평가하였다.