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알츠하이머 진단을 위한 당성분에 민감한 초파리 세포기반 ISFET센서개발
임정옥 ( Jeong Ok Lim ),유준부 ( Joon Boo Yu ),권재영 ( Jae Young Kwon ),변형기 ( Hyung Gi Byun ),허증수 ( Jeung Soo Huh ),조원주 ( Won Ju Cho ) 한국센서학회 2013 센서학회지 Vol.22 No.4
In this study a biosensor was developed by using Drosophila cells expressing a gustatory receptor Gr5a and an ion sensitive field effect transistors (ISFETs) sensor device, which demonstrated significant compatibility with the Drosophila cells expressing Gr5a and their response to sugar. These results suggested that the newly developed cell based biosensor has a potential as a simple and easy screening device for Alzheimer`s disease in the future.
A Study of Vision Biomembrane Assembly using Photoreactive Protein Adsorbed Polypyrrole Film
임정옥(Jeong Ok Lim),허증수(Jeung Soo Huh) 한국센서학회 2000 센서학회지 Vol.9 No.3
A protein based vision biomembrane was fabricated by adsorbing bacteriorhodopsin into electrochemically polymerized polypyrrole film substrate mainly through strong electrostatic interaction. The immobilized bacteriorhodopsin on the polypyrrole film was demonstrated by SEM and SRET. The light signal transducing function from the bacteriorhodopsin which was adsorbed into polypyrrole film was evaluated by electroretinogram(ERG). A wave form analysis of the electroretinogram indicated that the adsorbed bacteriorhodopsin retained its activity and light signal was obtained from the protein for at least one month.
두개천골요법 경험자와 비경험자의 CV-4 진행 동안 Alpha 비대칭과 항스트레스의 변화 비교
임정옥 ( Lim Jeong-ok ),심준영 ( Shim Jun-young ) 국제뇌교육종합대학원 뇌교육연구소 2020 뇌교육연구 Vol.26 No.-
이 연구는 두개천골요법 경험자와 비경험자를 대상으로 제4뇌실 압박법(CV-4) 진행 동안 좌우 전두엽의 뇌파측정을 통한 Alpha 비대칭과 육체적 항스트레스 지표의 변화를 비교하여 임상적 의미를 제시하는데 있다. 이를 위하여 중년여성 19명을 대상으로 CST 경험자 집단 8명과 비경험자 집단 11명으로 구분하여 CV-4 처치 전 200초, 처치 후 600초를 측정하였다. 반복측정분산분석과 각 측정시점에 대한 독립표본 t-검정 결과는 다음과 같다. 첫 번째, Alpha 비대칭에서 두 집단의 평균 패턴이 다르게 나타난 시점은 처치 후 0~200초에서 가장 큰 차이를 보였고, 다음으로 200~400초 시점에서 경험자 집단이 비경험자집단에 비해 평균값이 높게 나타났다. 두 번째, Alpha/Delta 비율에서는 처치직후인 0~200초 시점에서 경험자 집단이 비경험자 집단에 비해 평균값이 가장 높게 나타났다. 이러한 결과는 CST 경험자가 비경험자에 비해 처치 후 200초시점에서 우뇌의 Alpha파워를 높여 육체적 스트레스 저항력과 정서적 안정상태를 유도하는데 더 효과적으로 반응할 수 있음을 시사하였다. This study is to suggest clinical significance of comparing changes in alpha asymmetry and physical anti-stress indication through EEG measurement of left and right frontal lobes with experience group of Cranio sacral therapy (CST) and non-experience group of CST during CV-4 progress. It divided 19 middle-aged women into 8 CST experience cases and 11 non-experience cases of CST and measured them 200 sec. before CV-4 therapy and 600 sec. after CV-4 therapy. As a result of repeated measures ANOVA, the results of independent samples t-test were as follows. First, it was found that the average pattern of the two groups in alpha asymmetry showed the greatest difference at 0~200 sec. after the therapy and CST experience group showed higher average value than non-experience group of CST at 200~400 sec. after the therapy. Second, CST experience group showed higher average value that non-experience group of CST at 0~200 sec. after the therapy at alpha/delta rate. These results suggested that CST experience group enhanced alpha power of right brain at 200 sec. after the therapy compared to non-experience group of CST and reacted in inducing physical anti-stress and mental stability more effectively.
전기방사법을 이용한 Heparin-VEGF 함유 소구경 Elastin/PLGA/PCL 혈관지지체의 제조 및 In Vivo 평가
최정연 ( Jeong Yeon Choi ),정경영 ( Kyoung Young Jung ),이지선 ( Ji Seon Lee ),조석기 ( Suk Ki Cho ),전상훈 ( Sang Hoon Jheon ),임정옥 ( Jeong Ok Lim ) 한국조직공학과 재생의학회 2010 조직공학과 재생의학 Vol.7 No.2
Vascular scaffolds made of synthetic materials have been successfully used for many years for the revascularization of blood vessels with inner diameters ≥6 mm. However, small diameter vascular substitutes (<5 mm) have shown poor patency rates because of the occurrence of thrombosis. In this study, we investigated small diameter (~3 mm) vascular grafts composed of elastin, poly (lactic-co-glycolic acid : PLGA) and polycaprolactone (PCL) fabricated by electrospinning techniques. In addition, heparin and vascular endothelial growth factor (VEGF) were added to the scaffolds to prevent thrombosis on the target incision and promote endothelial cell growth on the surface of scaffolds. The arterial grafts of electrospun elastin/PLGA/PCL vascular prostheses in Sprague-Dawley rats were found to improve the recovery of the incised blood vessel function by promoting migration, attachment and proliferation of endothelial cells onto the vascular scaffolds, thus exploring the potential of electrospun polymer scaffold in vascular graft engineering.
휘발성유기화합물가스에 대한 폴리아닐린 센서의 감도 향상
유준부,유비,임정옥,변형기,허증수,Yu, Joon-Boo,Liu, Fei,Lim, Jeong-Ok,Byun, Hyung-Gi,Huh, Jeung-Soo 한국재료학회 2007 한국재료학회지 Vol.17 No.8
Nano-structured polyaniline have been synthesized by interfacial polymerization method at room temperature. An aqueous solution of aniline in chloroform and another solution of ammonium peroxydisulfate in doping acid were prepared at different times terminated with methanol at room temperature. SEM, UV-vis were used to characterize the polyaniline with regard to their morphology and structure. The diameter and length of polyaniline can be controlled by the reaction time. Nano-structured polyaniline were found to have superior sensitivity for volatile organic compounds(VOCs). As the reaction time to increase from 30minute to 2hours the sensitivity were decreased to VOCs vapors. The sensitivity of Nano-structured polyaniline sensor appeared to VOCs better than the sensitivity of chemical synthesis sensors. The sensitivity of Nano-structured polyaniline sensor improved benzene vapors.
이지훈,박재범,박단비,허증수,임정옥,Lee, Jihoon,Park, Jaebum,Park, Danbi,Huh, Jeung Soo,Lim, Jeong Ok 한국재료학회 2021 한국재료학회지 Vol.31 No.7
Graphene, a new material with various advantageous properties, has been actively used in various fields in recent years. Applications of graphene oxide are increasing in combination with other materials due to the different properties of graphene oxide, depending on the number of single and multiple layers of graphene. In this study, single-layer graphene oxide and multi-layer graphene oxide are spray coated on polystyrene, and the physicochemical properties of the coated surfaces are characterized using SEM, Raman spectroscopy, AFM, UV-Vis spectrophotometry, and contact angle measurements. In single-layer graphene oxide, particles of 20 ㎛ are observed, whereas a 2D peak is less often observed, and the difference in surface height increases according to the amount of graphene oxide. Adhesion increases with an increase in graphene oxide up to 0.375 mg, but decreases at 0.75 mg. In multi-layer graphene oxide, particles of 5 ㎛ are observed, as well as a 2D peak. According to the amount of graphene oxide, the height difference of the surface increases and the adhesive strength decreases. Both materials are hydrophilic, but single-layer graphene oxide has a hydrophilicity higher than that of multi-layer graphene oxide. We believe that multi-layer graphene oxide and single-layer graphene oxide can be implemented based on the characteristics that make them suitable for application.
이덕동,박길흠,최두현,한대현,백운이,임정옥,황태진 ( Duk Dong Lee,Kil Heum Park,Doo Hyun Choi,Dae Hyun Han,Woon Yi Baek,Jeong Ok Lim,Tae Jin Hwang ) 한국센서학회 1998 센서학회지 Vol.7 No.5
A new human sensibility (kansei) meter that can measure human sensibility at the indoor environment is developed in this paper. Four sensors that can measure temperature, humidity, CO₂ and C₄H_(10) concentrations are used. Among these sensors, the first three are used to determine the human sensibility, And the last to protect human from the harmful gas. First of all, human sensibilities are defined for each sensor datum, and then those are linearly combined to make a final human sensibility (kansei). The efficiency and usefulness of the meter are verified using a simulator on Windows 95 and a stand-alone system constructed using a microprocessor.