과수의 신종해충인 날개매미충 일종의 산란특성

최용석,황인수,강태주,임주락,최광렬,Choi, Yong-Seok,Hwang, In-Soo,Kang, Tae-Ju,Lim, Ju-Rak,Choe, Kwang-Ryul 한국응용곤충학회 2011 한국응용곤충학회지 Vol.50 No.4

2010년 충청남도 공주시 신풍면 사과원과 예산군 덕산면 블루베리 과원에서 최초로 보고된 이름 모를 날개매미충 일종은 대략 4-5년 전부터 과원에 출현하기 시작하여 급속도로 밀도가 증가한 것으로 추정된다. 날개매미충이 발견된 식물은 26종에서 관찰되었고, 주로 블루베리, 포도, 복숭아, 옻, 두릅, 대추, 키위, 복분자, 사과, 살구, 자두, 밤 이었다. 날개매미충의 산란은 주로 1년생 가지에서 이루어졌다. 사과와 자두의 1년생 가지에 산란된 난괴내 알의 평균수는 각각 18.7개와 15.3개였다. 또한 산란된 난괴의 평균길이는 각각 12.35 mm와 11.45 mm였다. 알의 평균크기는 길이가 1.2 mm 폭은 0.5 mm였다. 사과와 자두에 산란된 난괴내 알 간의 평균간격은 각각 1.3 mm와 1.5 mm로 차이를 보였으며 동일한 난괴 길이내 알의 평균수는 각각 17.1개와 13.3개로 차이를 보였다. An unknown planthopper was discovered in 2010 in an apple orchard in Sinpoong-myun, Gongju-si and in a blueberry orchard in Deogsan-myun, Yesan-gun. This pest have arrived 4 or 5 years ago and the population density then rapidly increased. It was identified as Ricania sp. by Dr. Murray J. Fletcher. Adult Ricania sp. was found on 26 plants including blueberry, grape, peach, sumac, japanese angelica, jujube, kiwi, Rubus coreanus, apple, apricot, plum and chestnut. Females lay eggs on 1-year-old branches. The mean number of eggs laid on apple and plum were 18.7 and 15.3, respectively. The mean length of egg masses on apple and plum were 12.35 and 11.45 mm, respectively. The distance between eggs laid on apple and plum branchs were 1.3 and 1.5 mm, respectively. The mean number of eggs in the same length of egg mass on apple and plum branchs were 17.1 and 13.3, respectively.

다공성 티타늄 임플란트의 생체적합성 증진을 위한 복합 표면처리에 관한 연구

조유정,김영훈,장형순,강태주,이원희,Cho, Yu-Jeong,Kim, Yung-Hoon,Jang, Hyoung-Soon,Kang, Tae-Ju,Lee, Won-Hee 한국재료학회 2008 한국재료학회지 Vol.18 No.5

Porous Ti implant samples were fabricated by the sintering of spherical Ti powders in a high vacuum furnace. To increase their surface area and biocompatibility, anodic oxidation and a hydrothermal treatment were then applied. Electrolytes in a mixture of glycerophosphate and calcium acetate were used for the anodizing treatment. The resulting oxide layer was found to have precipitated in the phase form of anatase $TiO_2$ and nano-scaled hydroxyapatite on the porous Ti implant surface. The porous Ti implant can be modified via an anodic oxidation method and a hydrothermal treatment for the enhancement of the bioactivity, and current multi-surface treatments can be applied for use in a dental implant system.

육묘과정 중 배양액 추비시용과 정식방법에 따른 "설향" 딸기 생육 및 수량에 미치는 영향

박갑순 ( Gab Soon Park ),강태주 ( Tae Ju Kang ),김영칠 ( Young Chil Kim ),안승원 ( Seoung Won Ann ) 한국환경과학회 2015 한국환경과학회지 Vol.24 No.2

This study was performed to identify the effect of fertilizer application and planting method on growth and yield of ``Seolhyang`` strawberry during seedling raising. According to the concentration of fertilizer applied, the height of daughter plants was the highest at an EC of 0.8 dS·m-1. Leaf number and crown diameter were greatest at an EC of 0.6-0.8 dS·m-1. In the first measurement, root number was highest in non-fertilizer application, while root weight was heaviest in non-fertilizer application and EC 0.4 dS·m-1. The higher the concentration of fertilizer applied as culture media, the lower the growth rate. Thirty days after planting on the main field, plant height and number of new leaf were highest at an EC of 0.8 dS·m-1. However, no significant difference was found in leaf length and width and chlorophyll content according to fertilizer application. Marketable yield of 25 g or higher was greatest in EC 0.6 dS·m-1. In contrast, no significance was found in total marketable yield at an EC of 0.4-0.8 dS·m-1. Aconsistent pattern was exhibited in the growth of 1-5 harvesting flower clusters according to planting method. The length of leaf and flower cluster was short and chlorophyll content was low, when bed soil was removed 100% in harvesting of the first flower cluster. In all treatment, leaf length was shortened until harvesting of the second and third flower cluster, but rapidly lengthened in harvesting of the third and fourth flower clusters. Moreover, the length of flower cluster had a increasing tendency from harvesting of the third flower cluster. However, chlorophyll content was reduced continuously until harvesting of the fifth flower cluster, and was lowest in harvesting of the fourth flower cluster without removal of bed soil. Total yield was greatest in treatment of crown removal in bed soil between November and May. Late marketable yield between March and May was highest in treatment of 100% bed soil removal, followed by treatment of crown removal. Marketable yield of 25 g or higher was greatest in treatment of crown removal between December and February, while greatest in treatment of 100% bed soil removal between March and May.

기계적 합금화에 의해 제조된 Ti5Si3 분말의 전기방전소결 특성 연구

천연욱 ( Yeon Wuk Cheon ),조유정 ( Yu Jung Cho ),강태주 ( Tae Ju Kang ),김정열 ( Jung Yeul Kim ),박준식 ( Jun Sik Park ),변창섭 ( Chang Sup Byun ),이상호 ( Sang Ho Lee ),이원희 ( Won Hee Lee ) 대한금속·재료학회 2009 대한금속·재료학회지 Vol.47 No.10

The consolidation of mechanical alloyed Ti5Si3 powder by electro-discharge-sintering has been investigated. A single pulse of 2.5 to 8.0 kJ/0.34 g was applied to each powder mixture using 300 and 450 μF capacitors. A bulk-like solid with Ti5Si3 phase has been successfully fabricated by the discharge with an input energy of more than 2.5 kJ in less than 160 μsec. Micro-Vickers hardness was found to be higher than 1350, which is significantly higher than that of a conventional high temperature sintered sample. The formation of Ti5Si3 and consolidation occurred through a fast solid state diffusion reaction.

유용미생물(EM) 기비시용 처리가 오이 생육 및 수량에 미치는 영향

김영칠 ( Young Chil Kim ),안승원 ( Seoung Won Ann ),강태주 ( Tae Ju Kang ),박갑순 ( Gab Soon Park ) 한국환경과학회 2015 한국환경과학회지 Vol.24 No.1

This study was aimed to determine the effect of basal application of Effective Microorganisms (EM) on the grow and yieldof cucumber. For treatments, the EM was applied to soil with fertilizer composed with N-P2O5-K2O-manure (24.0-16.4-23.8-2,000kg) in the 1.0 strength (defined as EM+1S), 2/3 strength (defined as EM+2/3S), 1/2 strength (defined as EM+1/2S), without fertilizer (defined as EM), or only fertilizer in the 1.0 strength (defined as 1S). In result, there was no significant differences of organic substance content and pH with the EM treatment. While the EC (Electric conductivity) concentration was decreased, plant-available P (phosphorus) was markedly increased. Chlorophyll content was highest in thetreatment of EM+standard application rate for both semi-forcing and retarding culture. In contrast, no significant difference was found in plant height and internode length under the fertilizer treatment. Weekly harvested number of cucumber was highest at the treatment of EM+standard application for the semi-forcing culture, while it was 3.6 at the EM+1/2 application for the retarding culture. Weekly yield was greatest at the EM+standard application treatment and decreased with the decrease of fertilizer application rate. In addition, weekly yield was significantly reduced in the treatment of EM . There was no significant difference in yields by production time with the fertilizer applications?. Yield was increased with temperature for the semi-forcing culture, while consistent pattern was maintained for the retarding culture.

EM 및 아미노산액비 시용이 "설향" 딸기 모주의 생육에 미치는 영향

안승원 ( Seoung Won Ann ),김영칠 ( Young Chil Kim ),강태주 ( Tae Ju Kang ),박갑순 ( Gab Soon Park ),이국한 ( Kook Han Lee ) 한국환경과학회 2015 한국환경과학회지 Vol.24 No.1

The dry weight of mother plants`` leaves had the highest increase rate in both NS (single-use) and NS+EM (mixed-use) mixed with NS 0.8 (customary use). In seafood amino acid fertilizer (SAF) application, the increase rate was highest in SAF solution at a 300-fold dilution. Mother plants`` crown diameter, plant height, leaf length, leaf width, petiole length and leaf number showed the greatest growth amount when NS 0.8 (customary use) was mixed to NS (single-use) or NS+EM (mixed-use) solution. The growth was highest in SAF solution diluted 300 folds, but lowest in SAF solution diluted 100 folds. Of all inorganic nutrients, excluding sulfur, total amount of nitrogen, available phosphorus, potassium, calcium and magnesium had the highest increase rate in both NS (single-use) and NS+EM (mixed-use) with the treatment of NS 0.8 (customary use). Total nitrogen, in particular, was increased by 3.1% in NS 0.4, 6.0% in NS 0.8, and 4.5% in NS 0.8 with the application of NS+EM at a 500-fold dilution compared to NS alone. Total nitrogen amount showed the highest increase rate in SAF solution diluted 300 folds. Total nitrogen, available phosphorus, calcium, magnesium and EC in soils applied with culture solutions (NS, NS+EM) had increasing tendencies after fertilizer application. The results were comparable to those of SAF treatment. The increase rate of each inorganic nutrient composition declined in soils applied with NS+EM solution diluted 500 folds compared to NS alone.

전기방전에 의한 Ti3Al의 합성 및 소결 특성 연구

장형순 ( Hyung Sun Jang ),조유정 ( Yu Jung Cho ),강태주 ( Tae Ju Kang ),김기범 ( Ki Beom Kim ),이원희 ( Won Hee Lee ) 대한금속·재료학회 2009 대한금속·재료학회지 Vol.47 No.8

Direct syntheses of bulk Ti3Al via electro-discharge-sintering (EDS) of a stoichiometric elemental powder mixture were investigated. A capacitor bank of 450 μF was charged with three input energies, 0.5, 1.0, and 1.5 kJ. The charged capacitor bank was then instantaneously discharged through 0.3 g of a Ti-25.0 at.%Al powder mixture for consolidation. Complete phase transformation occurred in less than 200 μsec by the discharge and a bulk Ti3Al compact was obtained. Compared with consolidated samples fabricated by conventional methods such as high vacuum sintering and casting, the electro-discharge-sintered Ti3Al compact shows a very fine microstructure with a hardness value of 425 Hv. Electro-discharge-sintering under a N2 atmosphere successfully modified the surface Ti oxide of the Ti3Al compact into Ti nitride, which concurred with the synthesis and consolidation of Ti3Al. Complete conversion yielding a single phase Ti3Al is primarily dominated by the fast solid state diffusion reaction.