• Korean Journal of Organic Agriculture
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• 제11권3호
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• pp.65-73
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• 2003

This study was conducted to investigate the effect of microbial liquid manure(MLM) on the growth and yield characteristics of Altari radish (Raphanus sativus L.). MLM 1,000mg$.$L$^{-1}$ MLM 2,000mg$.$L$^{-1}$ and MLM 1,000mg L$^{-1}$ + microbial fermentation compost(MFC) 600kg/10a were treated. MLM was sprayed on leaves at 10, 20, and 40 days after planting. Leaf length and width of radish in all microbial fertilizer treatments were more vigorous than that of control significantly. Number of leaves was great in order of 1,000 mg$.$L$^{-1}$ MLM+600kg/10a MFC 〉2,000mg$.$L$^{-1}$ MLM〉1.000mg$.$L$^{-1}$ MLM. SPAD reading value was increased with treatments of 2,000mg$.$L$^{-1}$ MLM and 1,000mg$.$L$^{-1}$ MLM+600kg/10a MFC. Root length and weight of all the microbial fertilizer treatments tended to increase compared with control, and 1,000mg$.$L$^{-1}$ MLM+600kg/10a MFC treatment was the most effective.

• The Journal of the Acoustical Society of Korea
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• 제17권3호
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• pp.10-16
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• 1998

본 논문은 음향반향제거기에서 동시통화구간을 검출하고 처리하는 알고리듬에 대하 여 논하고 있다. 새로운 동시통화처리 알고리듬은 송신신호와 잔류신호간의 상호상관계수를 이용하여 동시통화 여부 및 구간을 검출하고 이 구간에서는 반향제거기의 계수적응을 중지 하도록 하는 것이다. 본 알고리듬을 사용함으로서 동시통화구간의 검출에 소요되는 계산량 이 대폭 감소할 뿐만 아니라 비정상상태의 원인이 동시통화에 의한 것인지 아니면 반향경로 응답의 변화에 의한 것인지를 구별할 수가 있다. 음향반향제거기에 제안한 알고리듬을 적용 하여 모의실험을 수행하므로서 본 알고리듬의 성능을 분석하였고 기존의 알고리듬을 적용한 경우와 비교, 검토하였다. 실험 결과 본 알고리듬을 적용한 음향반향제거기는 동시통화구간 을 완벽하게 검출하므로서 동시통화 후에도 계수가 발산하지않고 안정적으로 정상상태를 유 지함을 확인하였다.

• Proceedings of the Korean Society of Postharvest Science and Technology of Agricultural Products Conference
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• 한국식품저장유통학회 2003년도 제23차 추계총회 및 국제학술심포지움
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• pp.165.1-165
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• 2003

복숭아는 절단 후 표면의 갈변현상이나 당도 저하 등이 발생하여 신선편이 식품화시 품질열화의 원인이 된다. 이에 본 실험에서는 일차적으로 유명 품종에 한해 fresh-cut peach의 anti-browning chemicals를 탐색하고, 그 결과를 통해 이차적으로 효과가 우수한 chemicals를 선정하여 백향 품종에 농도별 실험을 행하였다. 유명 품종을 반으로 절단한 후 제핵하고 8등분하여 1% ascorbic acid, 1% sodium chloride, 1% sodium ascorbate monohydrate, 0.005% 4-hexylresorcinol 용액에 3분간 침지시켜 draining한 후, PP tray에 담고 PP film으로 밀봉하여 4$^{\circ}C$에서 저장하였다. 가용성고형분은 to sodium chloride 용액으로 처리한 구에서 가장 높게 유지되었고 pH 또한 비교적 일정하였으며, 1% sodium chloride과 1% sodium ascorbate monohydrate 용액으로 처리한 구의 L값이 높게 유지되었다. 따라서 fresh-cut peach에 효과가 있는 것으로 판단되는 이 두 chemicals의 농도별 용액을 조제하여 같은 방법으로 백향 품종의 갈변저해제로서 처리하였다. 그 결과 2% sodium chloride의 가용성고형분이 가장 높게 유지되었으며 2% sodium ascorbate monohydrate 다음으로 2% sodium chloride 용액 처리구의 L값의 변화 양상이 가장 양호한 것으로 나타났다. 따라서 종합적으로 살펴볼 때, 2% sodium chloride 용액의 처리가 fresh-cut peach의 품질 변화 억제에 적합하다고 판단되었다.

• Proceedings of the Korean Fiber Society Conference
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• 한국섬유공학회 1999년도 가을 한국섬유공학회 학술발표회 논문집(Proceedings of the Korean Textile Conference)
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• pp.227-230
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• 1999

• Journal of Conservation Science
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• 제25권3호
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• pp.245-256
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• 2009

Stereo-Microscope observation, ultrasonic velocity, shore hardness and standard color measurement performed for studies of physical characterization of Namsan granite after treated with consolidants. The consolidants used in experiment are 35wt% Silicate Nonparticle/100%1T1G (Nonparticle), 3%POSS-SO1455/97%1T1G(3%POSS1455), POSS-SO1458/97%1T1G (3%POSS1458), 3%7nm/97%1T1G(3%7nm), 3%16nm/97%1T1G(3%16nm), 3% 40nm/97%1T1G(3%40nm) develop with Sejong university, and Wacker Silres BS OH-100, Unil Sandsteinfestiger OH-100. The color of rock surface is darker than original one but similar to original samples with time, and ultrasonic velocity and shore hardness increased with after consolidant treatment.

• Weed & Turfgrass Science
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• 제2권2호
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• pp.122-130
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• 2013

The object of this study is to review the current states of the characteristics and strategies to control annual bluegrass to apply information to the circumstance of South Korea. Annual bluegrass is one of the most widespread turfgrass species which has great ability to produce seedhead and shoot growth. It also has ability to tolerate low mowing height and to form uniformity of turfgrass when it is established. Annual bluegrass is well-known as weak turfgrass for high and low temperature. High rate of nitrogen and phosphorus improves growth of annual bluegrass. To control annual bluegrass, deep and infrequent irrigation is more effective than light and frequent irrigation. Clipping removal is more effective than clipping return to control annual bluegrass. Prodiamine, bensulide, and dithiopyr are applied as pre-emergence herbicide, and ethofumesate and bisbyribac-sodium are used as post-emergence herbicide. Paclobutrazol and flurprimidol are used as plant growth regulator. Trinexapac which is one of the most popular plant growth regulators (PGRs) in South Korea is not proper to control annual bluegrass because it accelerates improve growth of annual bluegrass in summer. Although chemical control is mainly used in South Korea, combination of cultural and chemical control may be the strategy to maximize effectiveness to control annual bluegrass.

• Journal of the Society of Cosmetic Scientists of Korea
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• 제28권1호
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• pp.42-57
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• 2002

본 연구는 널리 알려져 있는 항산화제들의 세포 수준에서의 anti-oxidative stress 효과 및 그 기작을 알아보기 위한 연구이다. 연구에 사용한 항산화제로는 지용성인 retinol, $\alpha$-tocopherol, propyl gallate(PG) 및 butylated hydroxy toluene(BHT)과 수용성인 ascorbic acid, $\alpha$-glucosyl rutin 및 green tea extract를 사용하였으며 이들 항산화제들의 시간별 세포 생존율을 NR assay 로 측정한 후 적정 농도에서 DCFH-DA(2', 7'-dichlorofluorescin-diacetate) 를 이용하여 항산화제들의 anti-oxidative stress 억제 효과를 시간별로 측정하였다. 또한 이들 항산화제의 항산화 기작을 알아보기 위하여 NBT(Nitro-blue-tetrazolium) 및 DPPH(Diphenyl-picry-hydrazl)도 병행하여 실시하였다. Anti-oxidative stress 실험에서 지용성 항산화제들은 전반적으로 수용성 항산화제에 비하여 세포에 대한 독성이 상대적으로 강하여 retinol 의 경우에는 0.01%에서 oxidative stress 억제 효과를 관할할 수 있었으며 1 시간경과 후 측정시 53.1%의 억제 효과를 보여 주었다. PG 의 경우에는 0.1%에서 2 시간 경과 후 측정시 50%의 oxidative stress 억제 효과를 보여주었다. 수용성 항산화제인 green tea extract 및 $\alpha$-glucosyl rutin의 경우에는 1%에서 1시간 경과 후 측정시 각 각 51.6% 및 69.7%의 oxidative stress 억제 효과를 관찰할 수 있었다. 또한 시료처리 후 자외선 조사시 oxidative stress 억제 효과의 경우 수용성 항산화제인 ascorbic acid, $\alpha$-glucosyl rutin 및 green tea extract 와 지용성 항산화제 중에서는 $\delta$-tocopherol 에서만 oxidative stress 억제 효과가 관찰되었으나 자외선을 조사 하지 않았을 때 보다 약 20%-40%까지 억제 효과가 감소되었다. 그리고 PG 및 retinol 의 경우에는 자외선 조사시 독성이 증가하여 oxidative stress 억제 효과를 측정할 수 없었다. NBT실험에서 $\alpha$-glucosyl rutin, $\alpha$-tocopherol 및 PG 1%에서 70%이상의 superoxide anion 생성 억제 효과를 보였으며 DPPH 실험에서는 ascorbic acid 와 PG 1%에서 98%의 hydroxyl radical 생성 억제 효과를 보여 주었다. 본 실험을 통하여 BHT 를 제외하고 전반적으로 세포 수준에서의 oxidative stress 에 대한 억제 효과를 확인해 볼 수 있었으며 특히 수용성 항산화제들에서 두드러진 효과를 보여 주었다.

• The Korean Journal of Pesticide Science
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• 제12권1호
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• pp.74-81
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• 2008

To elucidate the exposure of pesticide in agricultural environment and to investigate distribution of pesticide in paddy fields. This experiment was carried out to clarify pesticide distribution in paddy fields applied with different formulations and growing stages. Initial dissipation rate of applied butachlor EW and oxadiazon EC before rice planting were more than 90% within 3 days in paddy fields. The distribution of a.i. in the pesticide formulations tested depended upon the elapsed time at each growing stage of rice plant after application. Most of pesticides applied within 15 days after transplanting of rice seedlings, more than 95%, were located in the surface water and soil regardless of pesticides; butachlor, thiobencarb and molinate GR. The distribution of iprobenfos GR, tricyclazole WP and phenthoate EC, after application 2 hours in middle growing stage (46 days after rice planting) were shown as 16.1, 48.9 and 38.9% in surface water, 83.6, 15.4 and 10.7% in soil, and 0.3, 35.7 and 50.4% in rice plants of paddy fields, respectively. Also tricyclazole WP and phenthoate EC, after application 2 hours in the late rice growing stage (90 days after rice planting) were distributed to 7.8 and 9.8% in surface water, and 21.7 and 5.1% in soil, and 70.5 and 85.1% in rice plants of paddy fields, respectively.

• Korean journal of applied entomology
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• 제47권1호
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• pp.45-50
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• 2008

For the development of friendly environmental control of the beet armyworm, Spodoptera exigua that is too hard to control in the field, 25 insecticides were chosen from 58 registered to the beet armyworm, and bioassayed. There are 12 insecticides with neurotoxical activities, 10 with insect growth regulators and 3 Bacillus thuringiensis products. Among 12 insecticides with neurotoxical activities, mortality of S. exigua was 100% with emamectin benzoate (EC) and indoxacarb (WP) within 3 and 5 days after application, respectively. Otherwise, WG and SC of indoxacarb, Indoxacarb + etofenprox (WP) and pyridalyl (EW) were showed up to 91 %. Methoxyfenozide + spinosad (SC) was better than any other insect growth regulator as 100% mortality within 3 days after application. And methoxyfenozide (WP), tebufenozide (WP) and methoxyfenozide (SC) were 92% by 5 days. However, 3 kinds of B. thuringiensis products were showed under 35% mortality within 5 days from first spray.

• Journal of Bio-Environment Control
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• 제11권2호
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• pp.74-80
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• 2002

The effect of the foliar application of amino acid mixture on the growth of melon (Cucumis melo L.) seedlings was investigated. The amino acid treatments were initiated at the first (Ll) or second (L2) fully expanded leaf stage. The concentrations of amino acid mixture used were 0,10, 20, and 30 mg . L$^{-1}$ . At Ll stage, the fresh and dry weights of shoot were high in the amino acid treatments. Plant height was the highest in 30 mg . L$^{-1}$ at the third sampling of Ll. At L2 stage, shoot fresh weight was the greatest when the concentration of amino acid mixture was 30 mg.L$^{-1}$ at the third sampling. Plant height was the highest in 30 mg L$^{-1}$ at the second and third samplings. At the third sampling of Ll stage the amino acid mixture affected leaf length and leaf width of the first true leaf. At the third sampling of L2 stage leaf length was not significantly dirtferent between treatments, while leaf width was greater in amino acid treatments. At the second and third samplings of Ll stage the amino acid mixture had effect on leaf length and leaf width of the second true leafs which were not significantly different between treatments at L2 stage. Leaf length and leaf width of the third true leaf were affected by amino acid treatments. In conclusion, when the first true leaf expanded\ulcorner three foliar applications of 20-30 mg . L$^{-1}$ amino acid mixture can stimulate the growth of melon seedlings. If the amino acid mixture is sprayed at the second true leaf stage, two foliar applications of 30 mg . L$^{-1}$ amino acid mixture can improve the growth of melon seedlings.