• 한국자원식물학회지
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• 제32권3호
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• pp.228-236
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• 2019

This study is conducted to investigate the effects of growth characteristics (GC) and DPPH radical scavenging activity (DRSA) of the heading lettuce 'Fidel' depending on four concentrations of activated mineral groups (AMG: 1.6% active minerals and 0.03% CaO) added to basic nutrient solutions (diluted by 0, 0.05, 0.1, and 0.2%) and on four different light-emitting diodes (LED; B:R:W ratio = 0:1:12, 0:1:9, 0:5:5, and 2:3:5). Both 0.1 and 0.2% AMG showed better GC of lettuce in plant width, plant length, leaf width, leaf length, and the number of leaves than those of other AMG, while leaf thickness and chlorophyll value did not show significant difference among all AMG. Moreover, 0.1 and 0.2% AMG showed heavier shoot fresh weights than those of other AMG. As for the combinations of AMG and LED, B0:R5:W5 showed the best lettuce GC regardless of AMG compared to other AMG and LED combinations. As shown in the above results of LED, although there was a difference in lettuce growth by LED, the differences of lettuce growth by AMG were statistically significant. The DRSA was the highest at 82.8% in B2:R3:W5, followed by B0:R5:W5 at 77.8%. LED showed differences but AMG did not affect DRSA. Therefore, the optimal conditions in plant factory for GC and DRSA of the lettuce were 0.1% AMG and B0:R5:W5.

• 대한가정학회지
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• 제18권2호
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• pp.41-48
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• 1980

It has been more than ten years that the studies in the field of social gerontology I Korean had begun. But there had been no empirical study on this field about the published articles. This study intend to analyze and evaluate those achievements synthetically focusing on the past articles on the aged in Korea which had been published till March, 1980. And also intend to prepare a movement for the purpose of utilizing and fixing those past articles in order to contribute to the social gerontology I Korean. Used raw materials are as follows; 1) research papers of every college 2) thesis of annex research institute of every college 3) reports of academic institutes and organizations annex research institute of every college 30 reports of academic institutes and organizations 4) 42 copies of raw materials of seminars and doctoral dissertations and 3 independent volumes. In order to describe what kind of researches has been done in the field of social gerontology, categorized in six items focusing on the selected studies. 1) Process of unfolding and definitions of social gerontology 2) Economic life of old people 3) Works, Retirement, loneliness and alienation of the old people 4) Domestic management of old people 5) Medical and health aspects of old people 6) Welfare of old people These problems has been exposed through this research. Firstly almost every studies are descriptive and diagnostic rather than scientific for the theoretic development of gerontology. secondly it is difficult to generalize for the purpose of utilizing the outcome of researches I the broader and deeper sense those researches has been done in regional level. Thirdly there hadn't been any researches over the entire country in the governmental level. Thus it is impossible to deduce and analyze comparatively on the ground of governmental data.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2018년도 춘계학술발표회
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• pp.55-55
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• 2018

본 연구는 상추 '피델'을 이용한 완전제어형 식물공장에서의 재배를 하기 위해 기존의 배양액에 생육 촉진용 AMG의 농도를 구명하고 그에 맞는 매뉴얼을 확립하기 위해 실시하였다. 실험은 기존 배양액에 AMG(고활성 칼슘용액+복합 활성 미네랄)를 추가하였으며 '피델'의 생육에 적합한 AMG의 농도는 0, 0.05, 0.1, 0.2%를 양액에 추가하여 5반복 4처리로 진행하였다. 생육 조사 항목은 초폭, 초장, 엽장, 엽폭, 엽록소, 생체중을 조사하였다. '피델'의 생장에서 초폭, 엽폭, 엽장은 3주차부터 생장량이 급증하였으며 AMG 4처리구 5주차 조사에서는 초폭 평균 335g, 357g, 369g, 381g을 나타냈으며 엽폭은 평균 168g, 191g, 202g, 208g, 엽장 평균 129g, 134g, 144g, 144g으로 조사되었다. AMG 농도 0.1~0.2%는 통계적으로 생장 촉진 효과가 나타났으나 유의차가 크지 않아 0.1% AMG가 적정한 것으로 판단되었다. 엽록소 함량의 경우 정식 2주차 이후서부터는 SPAD 평균 29~32로 기록되어 엽록소함량은 크게 변화하지 않았다. 또한 엽수의 증가폭에 비해 생체중의 증가폭이 컸으며 생체중의 경우 정식 3주부터 5주 사이에 생체중이 5배 이상 급증하는 생장 패턴을 나타내었다. 5주차 생체중에서는 0% AMG의 경우 평균 82g, 0.05% AMG는 평균 85g, 0.1% AMG는 평균 115g, 그리고 0.2% AMG는 평균 114g으로 조사되었다. 따라서 0.1~0.2% AMG에서는 차이가 없게 나타남에 따라 생장촉진을 위해서는 0.1% AMG를 추가하는 것이 적정하다고 판단되었다.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2018년도 춘계학술발표회
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• pp.57-57
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• 2018

본 연구는 상추 '피델'을 이용한 완전제어형 식물공장에서의 재배를 하기 위해 기존의 배양액에 생육 촉진용 AMG의 농도를 구명하고 그에 맞는 매뉴얼을 확립하기 위해 실시하였다. 실험은 기존 배양액에 AMG(고활성 칼슘용액+복합 활성 미네랄)를 추가하였으며 '피델'의 생육에 적합한 AMG의 농도는 0, 0.05, 0.1, 0.2%를 양액에 추가하여 5반복 4처리로 진행하였다. 생육 조사 항목은 초폭, 초장, 엽장, 엽폭, 엽록소, 생체중을 조사하였다. '피델'의 생장에서 초폭, 엽폭, 엽장은 3주차부터 생장량이 급증하였으며 AMG 4처리구 5주차 조사에서는 초폭 평균 335g, 357g, 369g, 381g을 나타냈으며 엽폭은 평균 168g, 191g, 202g, 208g, 엽장 평균 129g, 134g, 144g, 144g으로 조사되었다. AMG 농도 0.1~0.2%는 통계적으로 생장 촉진 효과가 나타났으나 유의차가 크지 않아 0.1% AMG가 적정한 것으로 판단되었다. 엽록소함량의 경우 정식 2주차 이후서부터는 SPAD 평균 29~32로 기록되어 엽록소함량은 크게 변화하지 않았다. 또한 엽수의 증가폭에 비해 생체중의 증가폭이 컸으며 생체중의 경우 정식 3주부터 5주 사이에 생체중이 5배 이상 급증하는 생장 패턴을 나타내었다. 5주차 생체중에서는 0% AMG의 경우 평균 82g, 0.05% AMG는 평균 85g, 0.1% AMG는 평균 115g, 그리고 0.2% AMG는 평균 114g으로 조사되었다. 따라서 0.1~0.2% AMG에서는 차이가 없게 나타남에 따라 생장촉진을 위해서는 0.1% AMG를 추가하는 것이 적정하다고 판단되었다.

• Membrane and Water Treatment
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• 제6권1호
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• pp.77-94
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• 2015

Ultrafiltration membranes have several advantages over conventional drinking-water treatment. However, this technology presents major limitations, such as irreversible fouling and low removal of natural organic matter. Fouling depends heavily on the raw-water quality as well as on the operating conditions of the process, including flux, permeate recovery, pre-treatment, chemical cleaning, and backwashing. Starting with the premise that the optimisation of operating variables can improve membrane performance, different experiments were conducted in a pilot plant located in Granada (Spain). Several combinations of permeate and backwashing flow rates, backwashing frequencies, and aeration flow rates were tested for low-quality water coming from Genil River with the following results: the effluent quality did not depend on the combination of operating conditions chosen; and the membrane was effective for the removal of microorganisms, turbidity and suspended solids but the yields for the removal of dissolved organic carbon were extremely low. In addition, the threshold transmembrane pressure (-0.7 bar) was reached within a few hours and it was difficult to recover due to the low efficiency of the chemical cleanings. Moreover, greater transmembrane pressure due to fouling also increased the energy consumption, and it was not possible to lower it without compromising the permeate recovery. Finally, the intensification of aeration contributed positively to lengthening the operation times but again raised energy consumption. In light of these findings, the feasibility of ultrafiltration as a single treatment is questioned for low-quality influents.

• Animal Bioscience
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• 제35권3호
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• pp.377-384
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• 2022

Objective: This study was conducted to estimate multi-trait genetic parameters for somatic cell score (SCS), milk yield and type traits in Nigerian Dwarf (ND) goats from the United States. Methods: Data from 1,041 ND goats in the United States with kiddings in 95 herds were used to estimate multi-trait genetic parameters for SCS, milk (MILK), fat (FAT), and protein (PROT) yields, and 14 type traits. An 18-trait mixed linear animal model for lactation mean SCS (Log₂), MILK, FAT, PROT, and 14 type traits was applied. A factor analytic approach (FA1) in ASReml software was used to obtain convergence. Results: Averages for SCS were low (2.85±1.29 Log₂), and were 314±110.6, 20.9±7.4, and 14±4.9 kg, respectively, for MILK, FAT, and PROT. Heritabilities for SCS, MILK, FAT, and PROT were 0.32, 0.16, 0.16, and 0.10, respectively. The highest heritabilities for type traits were for stature (0.72), teat diameter (0.49), and rump width (0.48), and the lowest estimates were for dairyness (0.003) and medial suspensory ligament (0.03). Genetic correlations of SCS with MILK, FAT, and PROT were positive but low (0.25, 0.18, and 0.23, respectively). Genetic and phenotypic correlations between MILK, FAT, and PROT were high and positive (≥0.66). Absolute values of genetic correlations involving SCS with type traits were generally low or no different from zero. Most of the phenotypic correlations involving SCS with type traits were low. No serious unfavorable genetic correlations between milk yield traits and SCS or between milk yield traits or SCS and type traits were found. Conclusion: Genetic variation exists in the ND breed for most studied traits. The development of selection programs based on these estimates may help accelerate favorable multi-trait genetic changes in this breed.