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시설재배지 토양중 잔류농약 경감을 위한 잎들깨 종자코팅제 선발
최주현(Ju-Hyeon Choi),박현주(Hyeon-Ju park),박병준(Byung-Jun Park),박경훈(Kyung-Hun Park),김찬섭(Chan-Sub Kim) 한국농약과학회 2007 농약과학회지 Vol.11 No.4
In order to select the coating materials to perilla seed for reducing endosulfan residue greenhouse soil, this study was conducted to develop seed coating method and materials and also to evaluate the effects of seed coating on germination and color contrast between soil and perilla seed for convenient sowing work. Talc and kaoline were selected as seed coating materials because easy coating and better color contrast than shell powder or lime. Water was more effective on germination compared to alcohol, corn oil and spray sticker as adhesives for seed coating.
최주현(Ju-Hyeon Choi),김지선(Ji-Sun Kim),정구인(Gu-In Jung),이태희(Tae-Hee Lee),김아희(A-Hee Kim),오한별(Han-Byeol Oh),박희정(Hee-Jung Park),김경섭(Kyung-Seop Kim),전재훈(Jae-Hoon Jun) 대한전기학회 2013 전기학회논문지 Vol.62 No.9
The light intensity which represents the relative amount of brightness and darkness is very important feature to discern the color hue and its relevant information. With this aim, we devise a new optical system and method to analyze the light intensity. Our suggested system including a phototransistor and white-high-brightness chip light-emitting diode intend estimate the contrast value utilizing Image Research Institute(I.R.I.) Hue & Tone samples which includes 120 color sheets arranged by the color hue and tone. As a result, we confirmed that the brightness of the color checker can be accurately estimated by a high-brightness light-emitting-diode optical system.
적외선 광학렌즈와 칼코지나이드 기반 광학유리의 상관 관계
최주현(Choi Ju Hyeon) 한국세라믹학회 2020 세라미스트 Vol.23 No.3
Infrared optical glass properties such as refractive index and dispersion value are key factors in designing infrared optical lenses. Until now, infrared optical lenses successfully have been developed using chalcogenide glass materials such as Ge, As, Sb, S, and Se elements. Trends using corelation between dispersion and abbe number was described using standard Abbe diagrams for broad band spectrum. However, it was reported that dramatic changes to Abbe diagram depending on which band is examined. In this report, newly developed chalcogenide optical glass with low or high dispersion was applied to a new diagram. The effect was investigated by selecting two infrared optical materials that can reduce chromatic Abberations when designing an chromatic lens. It was found that chalcogenide glasses tended to suppress chromatic abberations in comparing with commercial crystal materials, such as ZnSe, ZnS used.
Double Covering 기법을 이용한 고강도 실크 직물 개발
최주현(Choi, Ju Hyun),백현국(Beak, Hyeon Kuk),조윤진(Cho, Yun Jin) 한국전시산업융합연구원 2014 한국과학예술융합학회 Vol.16 No.-
최근 친환경적이면서 기능적인 소재가 주목받고 있다. 이에 본 연구는 실크 더블커버링사를 개발하고, 개발된 실크 더블커버링사를 이용해 기능성 실크 직물을 제직하고자 하였다. 개발 결과는 다음과 같다. 첫째, 하나의 심사에 두 개의 초사를 서로 다른 방향으로 꼬아서 커버링을 시도한 실크 더블커버링사를 개발하였다. 둘째, 개발된 실크 더블커버링사로 실크 직물을 제직하였으며, 개발 직물의 원단 강도가 일반 연사를 이용한 경우보다 우수한 것으로 나타났다. 셋째, 개발된 직물에 기능성 가공을 실시한 결과 실용성이 향상되었다. 따라서 본 개발 직물은 향후 인테리어용, 지갑이나 가방과 같은 패션잡화, 그리고 신발용 갑피로도 사용 가능할 것으로 기대된다. The volume of the functional textile market is gradually growing in Korea. This study intended to develop the double covering yarn and high strength silk fabric. The key findings were as follows: Firstly, silk double covering yarn was developed. To improve the stretch and anti-bacterial, functional double covering yarn using nano silver was developed. Secondly, using double covering yarn, functional silk fabric was developed and its stretch was improved. Thirdly, to improve its functionality, the fabric was treated in nano silver padding and water repellency and antibacterial performance was improved. The results showed that high strength silk fabric could be used for the interior fabric and the upper part of shoes.
강위금,최주현,조강진,정연태,이재생,Kang, Ui-Gwm,Choi, Ju-Hyeon,Cho, Kang-Jin,Jung, Yeun-Tae,Lee, Jae-Saeng 한국토양비료학회 1987 한국토양비료학회지 Vol.20 No.4
우량(優良) 질소고정균주(窒素固定菌株)를 개발(開發)하여 척박(瘠薄)한 야산(野山) 개발지(開發地)에서 효율적(效率的)인 초지조성(草地造成)을 꾀하고자, 영남지역(嶺南地域) 목초지(牧草地) 근류균(根瘤菌)의 내산성(耐酸性) 정도(程度)를 시험(試驗)한 결과(結果)는 다음과 같았다. 1. 분리균주(分離菌株)의 내성산도(耐性酸度)는 R. meliloti의 경우(境遇) pH 4.3~5.5, R. trifolii에서는 pH 4.0~5.5 범위(範圍)이였음. 2. 내산성(耐酸性)이 큰 R. meliloti M3 및 M4와 R. trifolii T27, T30, T31, T33 균주(菌株)는 숙주접종(宿主接種)으로 근류(根瘤)를 형성(形成)하였고 질소고정력(窒素固定力)도 있었다. 3. 우리나라 야산(野山)의 평균산도(平均酸度)인 pH 4.8~5.0에서의 내산성(耐酸性) 균주(菌株)는 R. trifolii는 80~99%였으나 R. meliloti는 35~47%에 지나지 않으므로 보다 내산성(耐酸性)이 큰 R. meliloti의 선발(選拔)이 요구(要求)됨. This study was conducted to evaluate the degree of acid tolerance of indigenous Rhizobium in natural soils, and to select the superior Rhizobia for legume forage on hilly land. 153 Rhizobial strains isolated from two host genera, Medicago and Trifolium in the pastures of Yeongnam area were screened on acidic agar plates. The results obtained are summarized as follows: 1. The degrees of acid tolerance of R. meliloti and R. trifolii were ranged from 4.3 to pH 5.5 and from 4.0 to pH 5.5 respectively. 2. Among acid tolerant Rhizobia isolates, two strains of R. meliloti at pH 4.3 and three strains of R. trifolii at pH 4.0 were shown to have the activities of nodulation and nitrogenase. 3. R. trifolii strains were shown to survive about 80 to 99% at the pH range 4.8 to 5.0, while R. meliloti were about 35 to 47% at that pH range. Therefore, more acid tolerant R. meliloti should be developed for legume forage in Korean hilly land.
Carbosulfan , Furathiocarb 및 Benfuracarb 처리토양중 Carbofuran 방출특성
이영득,최주현 ( Young Deuk Lee,Ju Hyeon Choi ) 한국환경농학회 1995 한국환경농학회지 Vol.14 No.2
Three aminothio derivatives of carbofuran including carbosulfan, furathiocarb and benfuracarb were subjected to the degradation study in soils to investigate how fast and efficiently carbofuran would be evolved from them. Carbofuran was rapidly released from the derivatives in soils as the carbamoyl nitrogen-sulfur bond cleaved. Their degradation rates in soils, with half-lives of 23∼68 hours, were largely affected by structures of aminothio moieties and soil moisture conditions. Conversion rates into carbofuran ranged from 64 to 84% in soils on the basis of parent compounds 5 days after treatment. Application of aminothio derivatives led to less drastic increase in the carbofuran level in soils than when carbofuran was applied as such, and hence this might result in lower side effects in situ.
토양 중 endosulfan과 procymidone의 작물에 대한 흡수ㆍ이행 Ⅰ (실내시험)
박현주(Hyeon-Ju Park),최주현(Ju-Hyeon Choi),박병준(Byung-Jun Park),김찬섭(Chan-Sub Kim),임양빈(Yang-Bin Ihm),류갑희(Gab-Hee Ryu) 한국농약과학회 2004 농약과학회지 Vol.8 No.4
We investigated the residual amounts of endosulfan and procymidone taken by vegetables grown in hydroponics culture and field conditions treated with the pesticides in order to evaluate safe cultivation concentration of the pesticides in the vegetables. Endosulfan and procymidone were selected as test pesticides because they have been reported to frequently detect in agricultural products at different concentrations. In hydroponic culture, by Chinese cabbage, procymidone was absorbed 3.8 times higher than endosulfan. The higher the pesticide concentration get, the worse the plant grew. In soil treated with 10 ㎎/㎏ of endosulfan, the pesticide absorbed by Leafy radish, Chinese cabbage and radish was less then their MRLs. In case of carrot, the residue level in soil which did not exceed its MRL was 1 ㎎/㎏. The concentrations of procymidone in soil which did not exceed the MRLs in Leafy radish, Chinese cabbage, radish and carrot were 10, 10, 2 and 1 ㎎/㎏, respectively. Usually aged endosulfan and procymidone residues were less absorbed into crops than the fresh ones. Chinese cabbage absorbed more endosulfan and procymidone than leafy radish, radish doing more than carrot.