http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Biological Assay of Mercury and Cadmium Ions Using DNA Immobilized on a Nanotube Paste Electrodes
Ly, Suw-Young,Lee, Chang-Hyun,Jung, Hong-Rak,Park, Kwang-Ho,Park, Yong-Keun,Suk, Hong-Woo The Korean Society of Applied Science and Technolo 2012 한국응용과학기술학회지 Vol.29 No.2
Bio assay of mercury and cadmium ions were searched using voltammetric analysis using DNA doped carbon nanotube paste electrodes (DCP). The square-wave stripping voltammetryic optimized results indicated working ranges of 1-10.0 $ngL^{-1}$ and 20-100 $ugL^{-1}$, Hg(II) Cd(II) within an accumulation time of 120 seconds, in 0.1-M phosphate buffer solutions of pH 6.3. The relative standard deviations of 5 $ngL^{-1}$ Hg(II) and Cd(II) that observed were 0.14 and 0.22% (n=12), respectively, using optimum conditions. The low detection limit (S/N) was pegged at 0.1 $ngL^{-1}$ ($4.9{\times}10^{-11}M$) Hg(II) and 0.2 $ngL^{-1}$ ($1.77{\times}10^{-10}M$) Cd(II). The developed methods can be applied to assays in biological fish kidneys and water samples.
Radioactive uranium measurement in vivo using a handheld interfaced analyzer.
Ly, Suw Young,Lee, Jin-Hui,Jung, Dong Ho Pergamon 2010 Environmental toxicology and chemistry Vol.29 No.5
<P>A trace uranium (U) detection method was developed with a handheld voltammetric analyzer that was the size of a mobile phone, with working sensors made of simple graphite pencil electrode (PE). The optimum stripping voltammetric conditions were sought, and the following results were obtained: 0.0 to 0.08 ng/L working ranges and a statistically relative standard deviation of 1.78% (RSD; n=15) at a 10.0 microg/L U spike. The experiment accumulation time used was only 150 s. Under this condition, the diagnostic detection limit approached 0.007 ng/L. The method was applied to soil of a natural rock in a radioactive mineralogy site. Earthworms that resided at this site were assayed. The method was found to be applicable in biological diagnosis or in real-time in vivo survey.</P>
Administering Pesticide Assays in In Vivo-Implanted Biosensors
Ly, Suw Young,Jung, Young Sam,Lee, Chang Hyun,Won Lee, Bang CSIRO Publishing 2008 Australian journal of chemistry Vol.61 No.10
<P> An analytical pesticide assay of O-ethyl-O-4-(nitrophenyl)phenyl phosphonothioate (EPN) was carried out using the following: a carbon nanotube paste electrode, a mercury-immobilized carbon nanotube paste electrode, a glassy carbon electrode, a metal-gold electrode, and a DNA-immobilized carbon nanotube paste electrode (DPE), which is two-fold more sensitive than other sensors. The DPE was optimized using cyclic and square wave stripping voltammetry. Linear working ranges approached 5-55 mg L-1 EPN and the nano-range of 10-210 ng L-1 in a 0.1 mol L-1 NH4H2PO4 electrolyte solution, with a speedy analytical time of 30-s stripping. The detection limit was 2.57 ng L-1 (7.94 × 10-12 mol L-1), and the precision was 0.102% relative standard deviation (n = 15) at the 10.0 mg L-1 EPN spike. This indicates that the method is more sensitive than common voltammetric methods. This method was applied to fruit samples using patch- and needle-type electrodes, specifically on the skin tissues of an orange and an apple. Moreover, the implanted electrode was interfaced with a fish brain cell at the electrochemical workstation. Results showed that the aforementioned method can be used to conduct a pesticide assay in neuro-treated and non-treated cell systems. </P>
Real-time Detection of Trace Copper in Brain and Kidney of Fish for Medical Diagnosis
Young Kyun Yang,Eun Chul Pack,Seung Ha Lee,Hai-Soo Yoo,Dal Woong Choi,Suw Young Ly 한국독성학회 2014 Toxicological Research Vol.30 No.4
For the detection of trace copper to be used in medical diagnosis, a sensitive handmade carbon nanotube paste electrode (PE) was developed using voltammetry. Analytical optimized conditions were found at 0.05 V anodic peak current. In the same conditions, various common electrodes were compared using stripping voltammetry, and the PE was found to be more sharply sensitive than other common electrodes. At optimum conditions, the working ranges of 3~19 μgL<SUP>?1</SUP> were obtained. The relative standard deviation of 70.0 μgL<SUP>?1</SUP> was determined to be 0.117% (n = 15), and the detection limit (S/N) was found to be 0.6 μgL<SUP>?1</SUP> (9.4 × 10<SUP>?9</SUP> M). The results were applied in detecting copper traces in the kidney and the brain cells of fish.
Clinical In Vivo Bio Assay of Glucose in Human Skin by a Tattoo Film Carbon Nano Tube Sensor
Ly, Suw Young,Lee, Chang Hyun The Korean Society of Applied Science and Technolo 2017 한국응용과학기술학회지 Vol.34 No.3
In vivo assay of glucose detection was described using a skin tattoo film electrode (STF), and the probe was made from carbon nano tube paste modification film paper. Here in the square-wave stripping anodic working range obtained of $20-100mgL^{-1}$ within an accumulation time of 0 seconds only in sea water electrolyte solutions of pH 7.0. The relative standard deviations of 50 mg glucose that were observed of 0.14 % (n=12), respectively, using optimum stripping accumulation of 30 sec, the low detection limit (S/N) was pegged at 15.8 mg/L. The developed results can be applied to the detect of in vivo skin sensing in real time. Which confirms the results are usable for in vitro or vivo diagnostic clinical analysis.
Young Ly, Suw,Keun Kim, Jong Wiley Subscription Services, Inc., A Wiley Company 2009 Journal of biochemical and molecular toxicology Vol.23 No.4
<P>The electrical circuit of an infrared photodiode electrode (IPE) was used in the simultaneous assay of copper and cadmium ions. The electrode's cyclic voltammetry (CV), chronoamperometry and square-wave (SW) stripping voltammetric optimum conditions were examined. Results for 0–160 mg L<SUP>−1</SUP> and 50–400 μg L<SUP>−1</SUP> SW Cu(II) Cd(II), the relative standard deviation of 0.158 Cu(II), 0.077 Cd(II) (n = 15) using 20.0 mg L<SUP>−1</SUP> have been obtained at optimum conditions. The low detection limit (S/N) was attained to be at 14.71 μg L<SUP>−1</SUP>(2.31 × 10<SUP>−7</SUP> mol L<SUP>−1</SUP>) Cu(II) and 18.42 μg L<SUP>−1</SUP>(1.63 × 10<SUP>−7</SUP> mol L<SUP>−1</SUP>) Cd(II). The handmade electrode was implanted deep in the muscle of live fish and interfaced with an electrochemical workstation. Real-time analytical application was performed on the online assay of living tissue as the specimen was moving. The methods are deemed useful in interfaced assay for physiological control, nanodiode fabrication, and in the production of laboratory on a biochip. © 2009 Wiley Periodicals, Inc. J Biochem Mol Toxicol 23:256–262, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/jbt.20287</P>
Antibiotics Assay of Doxycycline in Food System using Stripping Voltammetry
Ly, Suw Young,Lee, Chang Hyun The Korean Society of Applied Science and Technolo 2016 한국응용과학기술학회지 Vol.33 No.4
A voltammetric analysis of doxycycline was developed using DNA immobilized onto a carbon nanotube paste electrode (PE). An anodic peak current was indicated at 0.2 V (versus Ag/AgCl) in a 0.1M $NH_4H_2PO_4$ electrolyte solution. The linear working range of the cyclic and square wave stripping voltammetry was obtained to $1-27ngL^{-1}$ with an accumulation time of 800 s. Final analytical parameters were optimized to be as follows: amplitude, 0.35 V; frequency, 500 Hz; and pH, 5.43. Here detection limit was found to be $0.45ngL^{-1}$, this result can be applied in foods systems and in the biological diagnostics
Ly, Suw Young,Kim, Min Joon Wiley Subscription Services, Inc., A Wiley Company 2009 Journal of clinical laboratory analysis Vol.23 No.2
<P>A voltammetric diagnosis of a chromium (VI) ion was investigated using a fluorine-doped graphite pencil electrode. Square wave (SW) stripping working conditions were attained at a high range of 0.051–0.45 mg L<SUP>−1</SUP> and a microrange of 0.05–0.4 µg L<SUP>−1</SUP> in a 0.1 M NH<SUB>4</SUB>H<SUB>2</SUB>PO<SUB>4</SUB> electrolyte solution, at a relative standard deviation of 1.68% (RSD, n=15), using 10.0 µg L<SUP>−1</SUP> Cr(VI). A fast experimental time was used only for the 120 sec SW accumulation time. An analytical detection-limit (DL) of 0.008 µg L<SUP>−1</SUP> was attained. DL appeared to be more sensitive than common voltammetric and spectrophotometric assays. The developed sensor was applied to tap water and the urine of a smoker. It was found that the methods can be applicable for in vivo fluid or medicinal diagnosis. J. Clin. Lab. Anal. 23:82–87, 2009. © 2009 Wiley-Liss, Inc.</P>
Toxic Effect of Cadmium Assay in Contaminated Soil Earthworm Cell Using Modified Sensor
Ly, Suw Young,Kyung, Lee,Kim, Chae Hwa,Seo, Roma,Lee, Soo Youn,Kim, Lina,Chae, Su min,Choi, Sung Wook,Kim, Ji Yoon Korean Society of ToxicologyKorea Environmental Mu 2015 Toxicological Research Vol.31 No.2
A voltammetric toxic metal of cadmium detection was studied using a fluorine doped graphite pencil electrode (FPE) in a seawater electrolyte. In this study, square wave (SW) stripping and chronoamerometry were used for determination of Cd(II) in seawater. Affordable pencils and an auxiliary electrode were used as reference. All experiments in this study could be performed at reasonable cost by using graphite pencil. The application was performed on the tissue of contaminated soil earthworm. The results show that the method can be applicable for vegetables and in vivo fluid or medicinal diagnosis.
Detection of Toxic Heavy Metal, Co(II) Trace via Voltammetry with Semiconductor Microelectrodes
Ly, Suw Young,Lee, Chang Hyun,Koo, Jae Mo Korean Society of ToxicologyKorea Environmental Mu 2017 Toxicological Research Vol.33 No.2
The cobalt (Co(II)) ion is a main component of alloys and considered to be carcinogenic, especially due to the carcinogenic and toxicological effects in the aquatic environment. The toxic trace of the Co(II) detection was conducted using the infrared photodiode electrode (IPDE) using a working electrode, via the cyclic and square-wave anodic stripping voltammetry. The results indicated a sensitive oxidation peak current of Co(II) on the IPDE. Under the optimal conditions, the common-type glassy carbon, the metal platinum, the carbon paste, and the carbon fiber microelectrode were compared with the IPDE in the electrolyte using the standard Co(II). The IPDE was found to be far superior to the others.