15 Result(s)

Article

Simultaneous Determination of Sildenafil, Tadalafil, and Vardenafil in Pharmaceutical Preparations by High-Temperature Gas Chromatography/Mass Spectrometry

Sildenafil (SD), tadalafil (TD), and vardenafil (VD) are drugs used to treat erectile dysfunction (ED). Pharmaceutical counterfeiting-related SD, TD, and VD compounds are becoming a critical problem due to the...

Yu-dong Jeong, SungIll Suh, ** Young Kim, Moon Kyo In, Ki-Jung Paeng in Chromatographia (2016)

Article

Thermal Degradation and Kinetics of Alginate Polyurethane Hybrid Material Prepared from Alginic Acid as a Polyol

Alginate polyurethane hybrid materials are prepared by varying mole ratio of 2, 4-TDI as a di-isocyanate and alginic acid as a polyol in presence of dimethyl sulfoxide (DMSO) as a solvent. FT-IR and ¹³C one-dimen...

**-San Kim, Tara Sankar Pathak, Jung-Ho Yun… in Journal of Polymers and the Environment (2013)

Article

Effect of Solvent Composition on Porosity, Surface Morphology and Thermal Behavior of Metal Alginate Prepared from Algae (Undaria pinnatifida)

Alginates, extracted from algae are linear unbranched polymers containing β-(1→4)-linked d-mannuronic acid (M) and α-(1→4)-linked l-guluronic acid (G) residues. The conversion of alginic acid into the metal algin...

Tara Sankar Pathak, Jung-Ho Yun, Se-Jong Lee… in Journal of Polymers and the Environment (2010)

Article

Preparation of Alginic Acid and Metal Alginate from Algae and their Comparative Study

Alginic acid and metal alginates are prepared from fresh algae using extraction method. A FTIR spectrum indicates that alginic acid is converted into the metal alginate. Comparing calcium and cobalt alginates,...

Tara Sankar Pathak, ** San Kim, Se-Jong Lee… in Journal of Polymers and the Environment (2008)

Article

Photoinduced synthesis of CdTe nanoparticles using Te-modified gold electrode in poly(vinyl pyrrolidone)-containing electrolyte

Photocathodic strip** of a pre-deposited tellurium film on a gold electrode in 0.1 M Na₂SO₄ electrolyte containing Cd²⁺ ions and poly(vinyl pyrrolidone) (PVP) was used as a route to the photoelectrosynthesis of...

Sunyoung Ham, Ki-Jung Paeng, **hyuck Park… in Journal of Applied Electrochemistry (2008)

Article

Simultaneous determination of cannabidiol, cannabinol, and \gD₉-tetrahydrocannabinol in human hair by gas chromatography-mass spectrometryin human hair by gas chromatography-mass spectrometry

An analytical method was developed for evaluating the cannabidiol (CBD), cannabinol, (CBN), and \gD₉-tetrahydrocannabinol (\gD₉-THC) level in human hair using gas chromatography-mass spectrometry (GC-MS). hair sa...

** Young Kim, Sung Suh, Moon Kyo In, Ki-Jung Paeng… in Archives of Pharmacal Research (2005)

Article

Determination of Dextromethorphan and its Metabolite Dextrorphan in Human Hair by Gas Chromatography–Mass Spectrometry

An analytical method has been developed for determination of dextromethorphan (DMP) and dextrorphan (DRP) in human hair by gas chromatography–mass spectrometry (GC–MS). Hair samples (30 mg) were washed with di...

** Young Kim, Sung Ill Suh, Ki-Jung Paeng, Moon Kyo In in Chromatographia (2004)

Article

Simultaneous Determination of Nalbuphine and Opiates in Human Hair by Gas Chromatography-Mass Spectrometry

The method for simultaneous determination of nalbuphine and opiates (codeine, morphine, and 6-monoacetylmorphine) in human hair was developed in the selected-ion monitoring (SIM) mode of a gas chromatography-m...

** Young Kim, Moon Kyo In, Ki-Jung Paeng, Bong Chul Chung in Chromatographia (2004)

Article

Potentiometric pH Response of Polymer Membranes Incorporated with Ion-exchangers

Moon Hwan Kim, Kyung Moon Lee, Hyun Joon Oh, Ho Choll Cho… in Analytical Sciences (2001)

Article

Evaluation of Chitin and Chitosan as a Sorbent for the Preconcentration of Phenol and Chlorophenols in Water

The evaluation of the applicability of chitin and chitosan as a sorbent material to solid phase extraction of phenol and chlorophenols was made by using high-performance liquid chromatography (HPLC). For the m...

Jae-Seong Rhee, Min-Woo Jung, Ki-Jung Paeng in Analytical Sciences (1998)

Article

Potassium-Selective PVC Membrane Electrodes Based on Newly Synthesized cis- and trans-Bis(crown ether)s

Kum-Chul Oh, Eun Chul Kang, Young Lag Cho, Kyu-Sung Jeong… in Analytical Sciences (1998)

Article

Comparative Studies on Various Room-Temperature Vulcanizing-Type Silicone Rubbers as Ion-Selective Electrode Matrices

In order to investigate the performance of different types of silicone rubber (SR) materials as matrices for ion-selective membrane electrodes, various cation-selective membranes are formulated from each of fo...

Kyung Lae Rho, Sang Hyun Han, Hakhyun Nam, Geun Sig Cha… in Analytical Sciences (1997)

Article

On-Line Preconcentration with Solid-Phase Extraction for the Determination of Phenol and Chlorophenols in Aqueous Samples by High-Performance Liquid Chromatography

Min-Woo Jung, Dai Woon Lee, Jae-Sung Rhee, Ki-Jung Paeng in Analytical Sciences (1996)

Article

Time-Resolved Resonance Raman Spectroscopy Using a Fast Mixing Device

A new fast mixing device has been developed. Our attention has been paid to improving the apparatus design in order to decrease the mixing dead time and to enhance the mixing efficiency. We modified and, mainl...

Ki-jung Paeng, Insook Rhee Paeng, James R. Kincaid in Analytical Sciences (1994)