• 한국자원식물학회지
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• 제19권5호
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• pp.573-579
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• 2006

한국 자생 개맨드라미를 초장생장을 억제시켜서 분화식물로서의 이용 가능성을 검토하기위하여 적심 및 왜화제처리에 따라서 생장 및 개화에 미치는 영향을 조사하였다. 적심의 횟수가 1회부터 3회까지 증가할수록 초장, 절간장 및 화서장은 월등히 작아지고 화서의 수, 엽수 및 측지수는 증가하였다. Diniconazole 12.5-$50.0mg{\cdot}L^{-1}$, hexaconazole 10.0-$40.0mg{\cdot}L^{-1}$ 및 daminozide 3,400-$13,600mg{\cdot}L^{-1}$의 처리는 개맨드라미의 초장, 절간장 및 엽장 등의 생장을 감소시켰고 화서의 수 및 잎의 수는 증가되었다. 특히 diniconazole $50mg{\cdot}L^{-1}$ 및 daminozide $6,800mg{\cdot}L^{-1}$ 처리는 대조구의 초장이 81.3cm에 비교하여 50cm 이하로 월등히 작았고 화서의 수는 2.7개로 대조구 1개보다는 월등히 많았다. 한편 hexaconazole과 daminozide는 농도 및 처리횟수가 증가할 수록 초장이 감소하는 경향이었으나 diniconazole은 차이가 없었다. 따라서 개맨드라미를 왜화시키기 위해서는 12cm 정도 자란, 생육 초기에 diniconazole $50mg{\cdot}L^{-1}$ 및 daminozide $6,800mg{\cdot}L^{-1}$를 1회 경엽에 살포하거나 $2{\sim}3$회 정도 적심해주는 것이 바람직하다.

• 한국지역지리학회지
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• 제11권6호
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• pp.517-529
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• 2005

연간 1,600여만 명이 찾는 대구 앞산에는 10여 개의 골짜기가 분포하며, 골짜기를 따라 이어지는 등산로에서는 다양한 지형 관찰이 가능하다. 본 연구에서는 탐방객들의 접근성과 지형자원 볼거리 면에서 세 곳의 골짜기(고산골.안지랑골.달비골)를 대상으로 지오투어리즘(geo-tourism) 관점에서 지형관찰 학습장 및 탐방로를 조성하여 보았다. 1) 앞산에서 볼 수 있는 대표적인 지형은 하식애, 풍화동굴, 수직암벽, 건열화석, 연흔화석, 습곡지형, 판상절리지형, 너덜지대, 선상지, 돌개구멍, 단층선, 가마솥바위, 주상절리지형, 변성암 등이다. 2) 앞산에서 볼 수 있는 지형을 대상으로 일반인도 이해할 수 있을 정도 수준의 설명문을 개발하였다. 3) 탐방객들의 학습효과를 높이기 위하여 골짜기별, 탐방객 체류 시간별로 아홉 가지의 지형관찰 탐방로를 개발하였다.

• Journal of Microbiology and Biotechnology
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• 제24권1호
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• pp.1-7
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• 2014

The possibility of using hyphomycete fungi as suitable biocontrol agents against greenhouse whitefly has led to the isolation of various insect pathogenic fungi. Among them is Beauveria bassiana, one of the most studied entomopathogenic fungi. The objective of this study was to use B. bassiana M130 as an insecticidal agent against the greenhouse whitefly. M130 isolated from infected insects is known to be a biocontrol agent against greenhouse whitefly. Phylogenetic classification of M130 was determined according to its morphological features and 18S rRNA sequence analysis. M130 was identified as B. bassiana M130 and showed chitinase (342.28 units/ml) and protease (461.70 units/ml) activities, which were involved in the invasion of the host through the outer cuticle layer, thus killing them. The insecticidal activity was 55.2% in petri-dish test, 84.6% in pot test, and 45.3% in field test. The results of this study indicate that B. bassiana has potential as a biological agent for the control of greenhouse whitefly to replace chemical pesticides.

• 한국응용과학기술학회지
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• 제33권1호
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• pp.168-175
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• 2016

유리섬유 번들의 인장강도와 복합재료의 매트릭스수지인 페놀수지와의 접착성을 향상시키기 위하여 관능기를 가진 실란 커플링제와 페놀 수지를 이용하여 표면을 개질하였다. 일반적으로 보강재인 유리섬유의 표면을 화학적으로 개질하므로 복합재료의 특성을 조절할 수 있다. 본 연구에서는 에폭시계인 glycidyltrimethoxysilane(G-silane)과 아미노계 aminopropyltriethoxysilane (A-silane)과 페놀 수지를 사용하여 여러 농도와 온도에서 유리섬유 표면에 1단계 처리 및 2단계 복합처리를 수행하였다. 이 때 열처리 조건이 인장강도를 향상시키는 데 가장 중요하였다. 즉 $170^{\circ}C$에서 처리된 유리섬유의 인장강도가 $10.05g_f/D$로 최대를 나타내었다. 개질 후의 유리섬유 표면은 전자현미경과 적외선분광법을 이용하여 분석하였다. 실란의 종류와 처리 조건에 따른 유리 섬유 기계적 강도에 관한 영향도 고찰하였다.

• 한국철도학회논문집
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• 제9권1호
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• pp.118-124
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• 2006

SThe rigidities of bridge substructures are the important data in the rail-bridge interaction analysis in Korean High -Speed Railway. This experimental study is being performed because of followings. 1) More correct longitudinal stiffness of the structure including substructure should be considered in the calculation of stresses in rails. 2) There are many uncertainties in the design and construction of the piers and foundations. 3) Actual guideline for the rigidities of piers and foundations in the design is necessary. 4) Measurement on the rigidity of pier according to the types of piers, foundations and soil-conditions is needed. Curve for estimating the total rigidity of substructure will be obtained through this and further experimental studies. It may be used in the analysis of Korean High-Speed Railway bridge and then, longitudinal stresses in the rails can be estimated more accurately. One pair of piers, which consist of pot-bearing for fixed support and pad-bearing for movable support, are loaded by steel frame devices with steel wire ropes and hydraulic jack. The responses which are measured at each loading stages in those field tests are displacements and tilted angles on the top and bottom of piers. This study is being performed testing and analysis about several piers in the construction field.

• 한국응용곤충학회지
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• 제31권4호
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• pp.536-542
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• 1992

비 이앙직전 carbofuran 토양혼화처리의 본논초기 발생해충 방제효과 및 비래성 해충인 벼멸구에 대한 약효지속효과를 조사하여 다음과 같은 결과를 얻었다. 포장에서 5월 하순 이앙직전 carbofuran 토양혼화처리는 6월 중순 carfuran 수면시용처리나 diazinon (3G) +BPMC (50% EC) 2회처리보다 본논초기 발생해충인 애멸구, 끝동매미충, 이화명나방 1화기에 대한 방제효과가 우수하였다. 폿트에서 carfuran 토양혼화처리의 벼멸구 암컷성충에 대한 직접살충효과는 약처리 1개월후에 50%정도로 떨어졌으나 그의 차세대에 대한 밀도억제효과는 약처리 37일후까지 90%이상, 46일후에도 70%정도를 유지하였다. 따라서 이상의 결과로부터 이앙직전 carfuran 토양혼화처리는 본논초기 발생해충 전반에 대한 효과적인 방제수단이 될 수 있으며 6월중 비래하는 벼멸구에 대해서 90%이상 그리고 7월 초순에 비래하는 벼멸구에 대해서도 어느정도의 밀도 억제효과를 발휘할 수 있을 것으로 생각된다.

• Journal of Plant Biology
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• 제29권1호
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• pp.41-51
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• 1986

The plants of Nicotiana tabacum L. cv. NC2326 were germinated in 10 cm D$\times$20 cm H polyethylene pot, and sand-cultured with Hoagland solution near by the window of laboratory room(26$\pm$5$^{\circ}C$). The growing plants were sprayed with various concentrations of ABA around 9 : 00 a.m. once in every two days for 12 weeks in summer. As the results, frequency of stomatal number, stomatal opening, chlorophyll content, respiration rate, and protein content in the leaves were decreased with the increasing of concentrations of ABA, respectively. The plant growth was inhibited by exogenous ABA, but leaf abscission was not found during the experimental period. The ratio of three to one in chlorophyll a to b was not altered by exogenous ABA. All the stomata were closed within three minutes by 100 $\mu\textrm{g}$ ml-1 ABA and within seven minutes by 1-10 $\mu\textrm{g}$ ml-1 ABA after the spraying of ABA, and then reopended after a few hours in 1-10 $\mu\textrm{g}$ ml-1 ABA and after 24 hours in 100 $\mu\textrm{g}$ ml-1 ABA. The polar movement of chloroplast within the guard cells was found in the higher concentrations of 10 and 100 $\mu\textrm{g}$ ml-1 ABA, but not found in the lower concentrations than 1 $\mu\textrm{g}$ ml-1 ABA. During the night and weak light, it was fond that the inhibition of respiration rate by the higher concentration of ABA was owing to firstly the stomatal closure by the spraying of ABA and secondly the decrease of stomatal frequency by the inhibition of stomatal development with exogenous ABA for the long period of 12 weeks. In the band number of leaf protein by the electrophoresis, most of the protein bands were disappeared by the higher concentration of 100 $\mu\textrm{g}$ ml-1 ABA, but were not altered by the lower concentration of ABA in comparison with control.

• Journal of Plant Biology
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• 제9권1_2호
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• pp.25-30
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• 1966

The writer presented in the report 7th of this series(Chong, 1959. '62 a.b. '64, '65) the result of fertlizer application on Sasamorpha purpurascens var. borealis with regards to soil conditions, climate, planting position etc. and this report is on the effectiveness of fertilizers by kinds of the new (1-year old) and old(3-to 4 years old) Phyllostachys retticulata. The ineffectiveness of fertilizers for old bamboos aged more than 8-years old has been reported previously. The study site was chosen in a bamboo groven situated at Hyunnae Ri, Okkye Myun, Myungju Gun, Kangwon Do. Each plot was so designed that only one individual remained at the center of a circular area with a dimeter of meters by eliminating the clums and severing the rhizomes, of other individuals around it. And, for the fertilizer test, 10 individuals(the new and old: 5 to 5) were observed per kind of fertilizer used; thus marking the total number of 160 plots in all. The second part of this study was conducted for the potted individuals which numbered 48, successfully established ones out of 55 the transplanted to pots. The 48 were divided into 8 treatments: whole fertilization (NPK＋compost＋human manure); NPK; N; K; Human manure; compost; and the control. Amoung of fertilizers applied was 200 grams for the natural plots and 100 grams for pot; it continued for 3 years and applied twice a year (spring and summer) following the theory of Dr. Koichi-ro Ueda(1954, '60 a.b.). Measurements were taken in August each year. The resutls were confirming the fact that the bamboos require a great deal of fertilizers. The results show the following points: 1) Fertilizers were more effective in the 3 to 4 year old bamboos. 2) The order of effectiveness of fertilizers by kind was the whole fertilization, NPK, and N treatments for Phyllostachys reticulata. 3) Organic matter in addition to commercial fertilizers showed better result than the soil application of the latter due to better soil aeration.

• Bulletin of the Korean Chemical Society
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• 제31권12호
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• pp.3593-3599
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• 2010

In an original effort, this lab attempted to employ polystyrene nanoparticles as a template for the synthesis of ordered and highly porous macroporous $SiO_2$ thin films, utilizing their high combustion temperature and narrow size distribution. However, polystyrene nanoparticle thin films were not obtained due to the low interaction between individual particles and between the particle and silicon substrate. However, polystyrene-polyacrylic acid (PS-AA) colloidal particles of a core-shell structure were synthesized by a one-pot miniemulsion polymerization approach, with hydrophilic polyacrylic acid tails on the particle surface that improved interaction between individual particles and between the particle and silicon substrate. The PS-AA thin films were spin-coated in the thickness ranges from monolayer to approximately $1.0\;{\mu}m$. Using the PS-AA thin films as sacrificial templates, macroporous $SiO_2$ thin films were successfully synthesized by vapor deposition or conventional solution sol-gel infiltration methods. Inspection with field emission scanning electron microscopy (FE-SEM) showed that the macroporous $SiO_2$ thin films consist of interconnected air balls (~100 nm). Typical macroporous $SiO_2$ thin films showed ultralow refractive indices ranging from 1.098 to 1.138 at 633 nm, according to the infiltration conditions, which were confirmed by spectroscopy ellipsometry (SE) measurements. This research shows how the synthetic control of the macromolecule such as hydrophilic polystyrene nanopaticles and silicate sol precursors innovates the optical properties and processabilities for actual applications.

• 대한화학회지
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• 제35권1호
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• pp.90-95
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• 1991

할로벤질 할라이드의 선택적 카르보닐화에 대한 방법을 검토하였다. 알킬(알콕시메틸)벤조에이트는 한 반응기에서 두 반응에 의해 완성되며, 일차로 알코올 용매하에서 알콕시 음이온을 할로벤질 할라이드와 반응시키면, 알킬 할로벤질 에테르가 Williamson ether 합성법에 의해 얻어진다. 이차로 Na$_2$CO$_3$, CH$_3$I 및 Co$_2$(CO)$_8$을 첨가하고, 일산화탄소 기류하에서 반응시키면, 알릴할라이드 부분이 카르보닐화되어 알킬(알콕시메틸)벤조에이트를 높은 수득률로 얻을 수 있었다.