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        검색결과 29

        21.
        2016.12 KCI 등재 서비스 종료(열람 제한)
        This study was investigated to develop mass evaluation system for the contents of crude protein, oil and fatty acid in soybean germplasm using NIRS. NIRS equations were created with 345 soybeans, multiple correlation coefficients of crude protein, oil, palmitic, stearic, oleic, linoleic and linolenic acid between data obtained from NIRS and quantitative analysis were 0.983, 0.969, 0.592, 0.514, 0.978, 0.961 and 0.957, respectively. Equation statistics indicated that contents of crude protein, oil and unsaturated fatty acid except palmitic and stearic acid in soybean seed were suitable for determination by NIRS. Those NIRS equations were applied to examine crude protein, oil and unsaturated fatty acid of 854 soybean landraces from Korea. The average contents and ranges of crude protein and oil were 39.2% with a range of 33.7-47.0% and 15.0% with a range of 9.8-20.3%, individually. In addition, those of oleic, linoleic and linolenic acid were 21.4% with a range of 12.1-30.2%, 55.6% with a 47.8-62.3% and 8.1% with a range of 5.9-10.7% respectively. We conducted quantitative analysis to reconfirm with IT154552 (45.1%) and IT023955(46.9%) above 45% of crude protein, the results were similar from NIRS (45.2%, 47.0%). NIRS data for protein from this study made no difference with lab data, which would be useful for mass evaluation. There was negative correlation (-0.203) between crude protein and oil, positive correlation (0.379) between crude oil and oleic acid, and significantly negative correlation (-0.879) between oleic and linoleic acid.
        22.
        2016.08 KCI 등재 SCOPUS 서비스 종료(열람 제한)
        This paper is the first of its kind using a non-linear approach based on cross-correlation function (CCF) to investigate the information arrival hypothesis in crude palm oil (CPO) futures market. Based on daily data from 1986 to 2010, our empirical results reveal that: First, the volume of volatility is not a proxy of information flow. Second, dependence causality running from current return to future volume in conditional variance exhibit an asymmetric pattern of time span with different signs of correlation between price and volume series. This finding indicates the presence of noise traders’ hypothesis of price-volume interaction in CPO futures market. Both findings suggest that this futures market is weak-form inefficiency. In terms of investors’ behavior, they tend to change their expectations on current return based on errors made in previous trade in generating abnormal volume in the subsequent period. As implied, it is advisable for the investors devise their future trading strategies according to time span and changes of return.
        23.
        2012.09 서비스 종료(열람 제한)
        Spilled oil into marine environments are known to induce disturbance not only hepatodetoxification system but also immune function in fish. However, toxic mechanisms on immune system and complex toxicity of crude oil have not been fully investigated. Innate immune response considered on the attractive effect-based monitoring tools due to their capacities to predict population disturbances by modification of disease susceptibility. In the study, to clarify the toxic effects of Hebei sprit spilled crude oil on fish immune system, multiple hepatodetoxific enzymes (Cytochrome P4501A and GST) and cytokines such as Interleukin-1beta (IL-1β), granulocyte colony-stimulating factor (G-CSF) were evaluated in juvenile Rockfish fed individually the gelatin-capsulated Iranian Heavy Crude Oil (IHCO). At 12 h after treatment, the oil-fed groups were shown higher concentrations of biliary 1-OH pyrene fluorescence metabolite and CYP1A expression than the control group. Cat. L and G-CSF mRNA also increased significantly at initial stage of exposure (from 12 h to 48 h after exposure) but decreased to the level of control group or less. 72 h post-oil injection, fish were intraperitoneallyadministered an LD50 dose of Streptococcus iniae (FP.5228; Korea Fish Diseases Information Center). Host survival was monitored for 7 days and cumulative mortality rate was calculated. Host mortality rate was increased significantly in oil exposure group compared to sham group.
        25.
        2008.07 KCI 등재 서비스 종료(열람 제한)
        We have studied bioremediation of effective microorganisms on crude oil spill in Taean, west-coast of Korea. Oil contaminated soil samples were collected on December 14, 2007, seven days after the Hebei Spirit oil-spilled accident. Total petroleum hydrocarbon (TPH) was measured to evaluate the effectiveness of effective microorganisms (EM) which were composed with yeast, photosynthetic bacteria and lactic acid bacteria on oil degradation. TPH concentration before EM treatment was 323.8 mg/kg, whereas TPH concentrations on 2 days after EM treatment and that of control (without EM) was 102.1 mg/kg and 170.6 mg/kg, respectively. On six days after EM treatment TPH was 91.3 mg/kg and that of control was 127.7 mg/kg. Percentages of degraded crude oil were 47.3% without EM and 68.5% with EM, 60.6% without EM and 71.8% with EM on 2 and 6 days after EM treatment, respectively. These results clearly showed that the application of effective microorganisms toward oil-contaminated soil was quite useful to degrade crude oil spill. These results were derived from the effects of biostimulation of microbial media nutrients and bioaugmentation of effective microorganisms. If we carefully apply these effective microorganisms, it can be a useful bioremediation method to recover oil-contaminated marine ecosystems.
        27.
        1998.12 KCI 등재 서비스 종료(열람 제한)
        본 실험은 더덕의 향기성분 향상과 식물정유의 함량을 높이기 위하여 토양환경가운데 pH를 인위적으로 조절하여 자생지에서 야생더덕이 가지는 고방향성의 특성을 노지에 재배할 경우 밭더덕에서도 고방향성을 갖는 재배기술을 확립하기 위하여 얻어진 결과를 요약하면 다음과 같다. 1. 토양 pH 4.5에서 만장은 247cm로 가장 짧았고 토양 pH 6.5는 299cm로 생육이 가장 촉진되었으며 뿌리의 무게는 토양 pH 5.5와 6.5에서는 각각 17.9g과 15.6g으로 무거웠다. 2. 조단백질은 토양pH가 알칼리 토양으로 진행될수록 함량이 감소되었고 조회분은 토양 pH와는 무관하게 회분함량이 최저 2.99%에서 최고 3.85%로 대한약전 생약규격에 명시된 더덕의 회분함량 허용치인 4.0%이하였다. 3. 식물정유함량은 토양 pH 5.5에서 0.007%로 토양 pH 7.5보다 더 높은 함량을 보였다. 4. 토양 pH에 따른 더덕 뿌리의 향기성분은 총 48종이 확인되었으며 이중에서 1-hpxanol, cis-3-hexanol 및 trans-2-hrxanol의 화합물이 큰 변화를 보였다. 5. trans-2-hexanol은 토양 pH 6.5에서 1.87 % area로 가장 높았다.
        28.
        1998.06 KCI 등재 서비스 종료(열람 제한)
        본 실험은 자생지의 야생더덕이 가지는 고방향성의 특성을 노지재배시 고방향성을 갖는 재배기술을 확립코자 차광정도를 달리하였던 바 얻어진 결과를 요약하면 다음과 같다. 1. 만장은 무차광에 비해 차광처리구 모두에서 길었으며, 특히 차광 35%와 75%에서 각각 243cm, 245m로 나타났고, 생근중은 무차광에 비해 75%차광에서 더 무거웠다. 2. 차광정도가 높아질수록 조단백질과 조지방의 함량이 감소하였고 조섬유는 무차광에 비해 차광정도가 높아질수록 함량이 감소하였다. 3. 식물정유는 차광정도가 높을수록 수율이 증가하여 75%차광에서는 0.007%로 가장 높게 나타나 더덕의 경우 식물정유의 수율을 높이는데 차광이 효과적이었다. 4. 더덕 뿌리의 향기성분은 총 48종이 확인되었고 1-hexanol, cis-3-hexanol, trans-2-hexanol 등이 가장 높은 비율을 차지하였다. 5. trans-2-hexanol은 차광처리간에 차이가 가장 컸고 75% 차광에서 160.32 % area로 무차광에 비해 약3.2배 높았다.
        29.
        1990.03 KCI 등재 서비스 종료(열람 제한)
        This paper discusses the various modes of operations of cargo ships which are liner operations, tramp shipping and industrial operations, and mathematical programming, simulation , and heuristic method that can be used to solve ships routing and scheduling problems for each of these operations. In particular, this paper put emphasis on a crude oil tanker scheduling problem. The problem is to achieve an optimal sequence of cargoes or an optimal schedule for each ship in a given fleet during a given period. Each cargo is characterized by its type, size, loading and discharging ports, loading and discharging dates, cost, and revenue. Our approach is to enumerate all feasible candidate schedate schedules for each ship, where a candidate schedule specifies a set of cargoes that can be feasibly carried by a ship within the planning horizon , together with loading and discharging dates for each cargo in the set. Provided that candidate schedules have been generated for each ship, the problem of choosing from these an optimal schedule for each ship is formulated as a set partitioning problem, a set packing problem, and a integer generalized network problem respectively. We write the PASCAL programs for schedule generator and apply our approach to the crude oil tanker scheduling problem similar to a realistic system.
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