http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
파라퀴논 유도체와의 전하이동착물 형성을 이용한 에녹사신 정량
이지연(J. Y. Lee),김동오(D. O. Kim),남수자(S. J. Nam),정문모(M. M. Jung),허문회(M. H. Hur),안문규(M. K. Ahn) 대한약학회 1999 약학회지 Vol.43 No.4
Enoxacin[1-ethyl-6-fluoro-1,4-dihydro-4-oxo-7-(1-piperazinyl)-1,8-naphthyridine-3-carboxylic acid, ENX is a new quinolone antibacterial agent. The method is based on the highly colored charge-transfer complex formation of this drug as a pi-electron donor with 7,7,8,8-tetracyanoquinodimethane(TCNQ) or chloranil(CL) as pi-acceptors. The colored products were measured spectrophotometrically at 842nm and 552nm for TCNQ and CL, respectively. The different experimental conditions are optimized. The linearities for TCNQ and CL were 1.6mcg/mL~32mcg/mL and 6.4mcg/mL~160mcg/mL, respectively and colors were produced in non-aqueous media. This report describes a simple and rapid method for the analysis of enoxacin.
Nanofibrillation of Silk Fibroin and its Application to Piezo Sensor through Structural Molding
J. Y. Lee(이지연),C. Kim(김철생),C. H. Park(박찬희) Korean Society for Precision Engineering 2021 한국정밀공학회 학술발표대회 논문집 Vol.2021 No.11월
Most of the nanofiber-based piezo sensors are still manufactured based on synthetic polymers. When it is implanted in the human body for application as a biosensor, limitations such as cytotoxicity and permanent retention are inevitably revealed. Therefore, we fabricated a silk fibroin-based nanofiber membrane that can act as a sensor remain only for a set period of time in vivo without cytotoxicity. Unlike synthetic polymers, the manufacturing process of nanofibers using natural proteins, silk fibroin, is complicated and difficult, and the physical properties are considerably weak. Accordingly, we have solved the problems that have been raised in the past by molding the protein structure to beta-sheet. The beta-sheet structure created through the treatment process not only strengthened the piezo effect but also increased its physical properties. This shows the potential as a biosensor that can be inserted into the human body in various areas and is expected to increase patient convenience.
이지연(J . Y . Lee),박소양(S . Y . Park),김미희(M . H . Kim),양수진(S . J . Yang),조은나(E . N . Joe) 대한산부인과학회 2002 Obstetrics & Gynecology Science Vol.45 No.2
The amniotic band syndrome is a collection of fetal malformation associated with fibrous bands that appears to entangle or entrap various fetal parts in utero, leading to deformation, malformation, or disruption. Its pathogenesis has been still debated in the literature for many years. The associated anomalies vary from minor limb anomalies to major craniofacial defect, and visceral defects. We had experienced a case of limb anomalies due to amniotic band and presented with a brief review of literature.
J. Y. Lee(이지연),H. C. Shim(심형철),S. M. Hyun(현승민),M. S. Oh(오민섭),S.-J. Jeon(전성재),S. H. Jeong(정수환) Korean Society for Precision Engineering 2021 한국정밀공학회 학술발표대회 논문집 Vol.2021 No.11월
As the electric-vehicle market grows, the massive efforts have been tried to develop materials with high capacity and high power for lithium ion secondary batteries. Sn-based anode materials are highly promising due to high theoretical specific capacity (994 mAh/g) as well as high power density for its excellent electrical conductivity. However, the use of Sn has been limited by the delamination from the current collector and degradation in structural stability due to the large volumetric change of ~257% during lithiation and delithiation process. To solve this problem, many studies have been attempted to alleviate volume expansion by inserting Sn particles into a soft carbon matrix, but it has been considered difficult to mass-produce due to the complicated manufacturing process. In this work, graphene/Sn composite material was prepared by a laser processing followed by RF magnetron sputtering. Porous graphene structure was rapidly fabricated using a laser irradiation, and Sn layer was deposited on the graphene by sputtering. This simple and fast manufacturing techniques helps to produce graphene/Sn composites without complicated process, and can also be easily adaptable to mass production. The resulting graphene/Sn composite-based anode exhibited a high capacity of 430 mAh/g at 2C and stable cyclability over 700 cycles at
이지연(G.Y.Lee),손건석(G.S.Son),김대중(D.J.Kim),이용래(Y.R.Lee),이귀영(K.Y.Lee) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.6_1
Twelve samples from field-aged catalyst were investigated. The conversion performance was measured in a model gas test. The samples taken from the inlet side of the monolith were more deactivated than the corresponding ones from the outlet. However, samples taken from peripheral positions always showed better performance than samples originating from the center. In order to explain observed variations in activity the total surface area(B.E.T) and poisoning of each sample(EDS) were examined. It was concluded that thermal deactivation was mainly responsible for the difference between peripheral and central position while the poisoning due to S, Pb and P had the largest effect on the inlet samples.<br/>