• 한국토양비료학회지
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• 제7권4호
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• pp.197-200
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• 1974

여섯가지 성질이 다른 토양에 PCP 흡착실험(吸着實驗)을 습식진탕법(濕式振湯法)으로 행한 결과(結果)는 다음과 같았다. 1) PCP 흡착(吸着)을 지배(支配)하는 주요인(主要因)은 토양(土壤) pH이다. 2) 유기물함량(有機物含量)이 많을수록 PCP의 흡착량(吸着量)이 증가(增加)된다. 3) PCP 흡착량(吸着量)은 토양내(土壤內) 결정성(結晶性) 점토광물(粘土鑛物)의 종류(種類)와는 관계(關係)가 적었다.

• 한국유기농업학회지
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• 제21권1호
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• pp.33-48
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• 2013

This work is for listing, patent, reasonable valuation of environmental-friendly agricultural company. In this study, agricultural company in environmental friendly industry that consider nature, customer's wellbeing and safe would be evaluated by DCF (Discounted Cash Flow) and ROV (Real Option Value). And company in environmental-friendly industry would be checked whether it is to be related and concerned to listing in the stock market and patent acquisition with the basis of company valuation. After then agricultural company value is evaluated with the consideration of growth in environmental-friendly industry, and company valuation comparison would followed about intellectual property right. It can be assumed that value of environmental-friendly agricultural company has low relation and concern to listing of stock market, and valuation would be increased through the intellectual property right such as patent, development or core search ability.

• 한국지역사회생활과학회지
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• 제17권2호
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• pp.139-150
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• 2006

The purpose of this study was to investigate Visitors' satisfaction at Eco-Agriculture/Organic Food Expo held in Uljin in 2005. The questionnaire survey with 1,120 participants was conducted at the venue for three times from July 22nd to August 15th, 2005. The evaluation considered Expo facilities and services, and motives of visit along with demographics of 1,080 valid samples. Evaluation results indicate overall satisfaction level of Expo participation was positive and 63.6% of the respondents showed intention of revisit and/or future visit to agricultural events. Expo facilities and service represented higher satisfaction level, however cost factors such as food and beverage, souvenirs and entrance fee had lower performance levels. The study outcome can help local governments and/or organizers host hallmark tourist events in planning and managing.

• Journal of Microbiology and Biotechnology
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• 제11권5호
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• pp.884-886
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• 2001

The reactivity and stability of purified Lignostilbene- ${\alpha}$,${\beta$}-dioxygenase (LSD)-I were examined. Its optimum temperature was $50^{\circ}C$ at pH 8.5, but it was stable only up to $30^{\circ}C$. The activity of LSD-I increased 12-fold by $30\%$, with increased $V_{max}$ and lowered $K_m.$ LSD-I was stable in 10% methanol.

• Progress in Superconductivity
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• 제3권1호
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• pp.41-44
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• 2001

We report the current transport properties of a normal metal/organic conductor/ superconductor tunnel junction as a novel high- $T_{c}$ superconducting three terminal device. The organic copper (II) phthalocyanine (Cu-Pc) layer was used far a polaronic quasiparticle (QP) injector. The injection of polaronic QP from the Cu-Pc interlayer into a superconductor $Bi_2$$Sr_2$$CaCu_2$ $O_{8+}$ $\delta$/(BSCCO) thin film generated a substantially larger nonequilibrium effect as compared to the normal QP injection current. The tunneling spectroscopy of an Au/cu-PC/BSCCO junction exhibited a zero bias conductance peak which may be due to Andreev reflection at a Cu-Pc/d-wave superconductor junction.n..

• 식물병연구
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• 제20권1호
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• pp.37-49
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• 2014

식물 기원의 살선충 물질 탐색 연구의 일환으로, 178과, 1,677종 식물의 부위별 조추출물 2,714종을 이용하여 이들이 선충의 활성에 미치는 영향을 검토하였다. 선충억제 활성 검정은 96-well microplate를 이용하였으며 부식성선충 20마리를 조추출물 $5,000{\mu}g/ml$에 침지하고 7일간 매일 관찰하였다. 시험결과 2,362종(87.0%)의 조추출물은 부식성선충에 전혀 영향을 미치지 않았고, 187종(6.9%)의 조추출물은 부식성선충의 활성을 50% 정도 억제하였고, 95종(3.5%)의 조추출물은 90% 이상 억제를 보였으며, 70종(2.6%)의 조추출물에서는 오히려 부식성선충이 번식되었다. 1차 검정에서 50% 이상 선충억제 활성을 보인 추출물중에서, 25개의 추출물을 임의로 선택하여 2, 3차(부식성선충), 4차(고구마뿌리혹선충 유충) 반복 시험을 수행한 결과, 약 44%의 시료는 지속적인 선충억제 활성을 보였다. 이번 시험에서 선충억제 활성을 나타낸 282개의 식물 조추출물은 앞으로 식물 기원의 살선충 물질 연구시 참고 자료로 활용될 수 있을 것이다.

• 한국작물학회지
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• 제54권2호
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• pp.218-224
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• 2009

동계 피복작물의 파종 시기는 월동 후 회복률과 생산량에 아주 중요한 영향을 미치나, 포장에서 피복작물은 주작물의 수확이 끝난 후에 파종되기 때문에 주작물의 수확이 늦어질 경우 파종 시기를 놓쳐 안전한 월동이 어려울 수 있다. 본 실험에서는 4종의 피복작물에서 파종 시기에 따른 생육의 변화를 알아보았다. 1. 실내 발아 조사를 실시한 결과 모든 피복작물에서 $25^{\circ}C$와 $20^{\circ}C$에서는 비슷한 경향을 보였고, $15^{\circ}C$ 이하 처리구에서 온도가 낮아질수록 초기 발아율이 낮게 나타났다. 호밀은 $5^{\circ}C$ 에서 처리 4일 후부터 발아를 시작해 처리 7일 후에는 90% 이상이 발아되었다. 2. 월동 전 생육 조사에서 크림손클로버, 알팔파, 헤어리베치는 지상부 길이와 생체중이 9월 파종구와 10월 파종구간에 차이를 보였고, 호밀은 9월 파종구와 10월 파종구 간에 큰 차이가 없어 다른 작물에 비해 내한성이 뛰어났다. 3. 월동 후 생체중은 모든 피복작물이 9월 파종구와 10월 파종구 사이에 차이가 나타났다. 호밀과 헤어라베치는 월동후 지상부 길이가 파종일에 따라 차이가 크지 않았으나, 크림손클로버와 알팔파는 10월 11일 이후 파종구에서 감소했다. 4. 크림손클로버는 10월 4일 이전 파종구에서는 피복률이 80% 이상으로 높게 나타났으며, 이후의 파종구에서는 점차 감소되어 10월 25일 파종구에서는 11.9%로 나타났다. 알팔파는 10윌 파종구에서 파종일이 늦어짐에 따라 피복률이 감소되었으며, 호밀과 헤어리베치는 파종 시기에 관계없이 우수한 피복률을 보였다.

• Asian-Australasian Journal of Animal Sciences
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• 제14권7호
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• pp.966-969
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• 2001

Some researchers reported that beef marbling was improved by the supplementation of organic zinc to a diet satisfying zinc requirement. We studied the relationship between serum zinc concentration and marbling score or serum adipogenic activity in 40 fattened steers. To determine serum adipogenic activities of the steers, preadipocytes were cultured in medium containing the serum samples during differentiation. Although serum zinc concentration was not related to beef marbling score, it was positively correlated to adipogenic activity. Then, we studied the effect of zinc on adipocyte differentiation. Zinc was added into the medium with the similar methods except the addition of fattened calf serum. The activity of glycerophosphate dehydrogenase, a marker of adipocyte differentiation, was significantly increased by the addition of zinc in culture with or without insulin. These results suggest that zinc possibly improved beef marbling through increasing adipogenic activity during fattening.

• 한국고분자학회:학술대회논문집
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• 한국고분자학회 2006년도 IUPAC International Symposium on Advanced Polymers for Emerging Technologies
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• pp.331-331
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• 2006

Polylactic acid (PLA) is a promising polymer because it can be derived from renewable resources and provides a biodegradable alternative to petrochemical based polymers. This research aims to synthesize PLA, through direct polycondensation and also tries to avoid the occurrence of separation by-product and the use of catalysts in the process. The polymerization of lactic acid was done at three different temperatures $150^{\circ}C,\;180^{\circ}C\;and\;200^{\circ}C$ for 90 h without catalysts and organic solvent. The proposed process provides results that are comparable to those that incorporate catalysts; during polymerization temperature was $180^{\circ}C$ the molecular weight of PLA obtained reached 42448 Da. The thermal properties of PLA analysis by Differential Scanning Calorimetry (DSC).

• Journal of Biosystems Engineering
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• 제26권5호
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• pp.475-480
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• 2001

Sensing soil organic matter is crucial for precision farming and environment friendly agriculture. Near infra-red(NIR) was utilized to measure the soil organic matter. Multivariate calibration methods, including stepwise multiple linear regression(MLR), principal components recession(PCR) and partial least squares regression(PLS), were applied to soil spectral reflectance data to predict the organic matter content. The effect of soil particle size and water content was studied. The range of soil organic matter contents was from 0.5 to 11%. Near infrared (NIR) region from 700 to 2,500nm was applied. For uniform soil particle size, result had good correlation (R$\^$2/ = 0.984, standard error of prediction= 0.596). The effect of soil particle size could be eliminated with 1st order derivative of the NIR signal. However. moist soil had a little lower correlation. R$\^$2/ was 0.95 and standard error of prediction was 0.94% using the PLS method. The results showed the possibility of soil organic matter measurement using NIR reflectance on the field.