Search Results - "Sangwon Cha"

In Situ Separation and Analysis of Lipids by Paper Spray Ionization Mass Spectrometry by Kal, Youngju, Cha, Sangwon

“…Paper spray ionization (PSI) is an extractive ambient ionization technique for mass spectrometry (MS), whereby a triangular paper tip serves as the sampling…”
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Bright ligand-activatable fluorescent protein for high-quality multicolor live-cell super-resolution microscopy by Kwon, Jiwoong, Park, Jong-Seok, Kang, Minsu, Choi, Soobin, Park, Jumi, Kim, Gyeong Tae, Lee, Changwook, Cha, Sangwon, Rhee, Hyun-Woo, Shim, Sang-Hee

“…We introduce UnaG as a green-to-dark photoswitching fluorescent protein capable of high-quality super-resolution imaging with photon numbers equivalent to the…”
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Determination of Sulfites in Dried Fruits by Paper Spray Ionization Tandem Mass Spectrometry by Lee, Donghoon, Ro, Heejin, Hwang, Seoyoung, Lee, Minkyu, Kim, Hyebeen, Heo, Jaeyoung, Cha, Sangwon

“…Sulfite, a widely used food additive, is subject to regulated labeling. The extraction of sulfite as the stable hydroxymethylsulfonate (HMS) form and its…”
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Colloidal Graphite-Assisted Laser Desorption/Ionization Mass Spectrometry and MSn of Small Molecules. 1. Imaging of Cerebrosides Directly from Rat Brain Tissue by CHA, Sangwon, YEUNG, Edward S.

“…Graphite-assisted laser desorption/ionization (GALDI) mass spectrometry (MS) was investigated for analysis of cerebrosides in a complex total brain lipid…”
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Toward Depth-Resolved Analysis of Plant Metabolites by Nanospray Desorption Electrospray Ionization Mass Spectrometry by Cha, Sangwon, Jun, Gyouwoong, Park, Yougyeong, An, Sung Jun, Lee, Donghoon

“…Nanospray desorption electrospray ionization (nano-DESI) is one of the ambient desorption ionization methods for mass spectrometry (MS), and it utilizes a…”
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Colloidal Graphite-Assisted Laser Desorption/Ionization MS and MSn of Small Molecules. 2. Direct Profiling and MS Imaging of Small Metabolites from Fruits by ZHANG, Hui, CHA, Sangwon, YEUNG, Edward S.

“…Due to a high background in the low-mass region, conventional MALDI is not as useful for detecting small molecules (molecular masses <500 Da) as it is for…”
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Simple Protein Analysis by Droplet Paper Spray Ionization Mass Spectrometry with Polyolefin Silica-Based Paper by An, Sung Jun, Kal, Youngjoo, Jeong, Minjoo, Kang, Sumin, Kwak, Byeongho, Kim, Hyunsoo, Ryu, Shihyeon, Cha, Sangwon

“…Paper spray ionization mass spectrometry (PSI MS) has emerged as a notable method for the rapid analysis of biological samples. However, the typical…”
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GC-MS and GC-FID Analysis of Citronella Oil Products for Indicator Ingredient Identification by Sumin Kang, Wooil Kim, Jin Wuk Lee, Sangwon Cha

“…Citronella oil, an essential oil extracted through steam distillation from the leaves and stems of Cymbopogon, is a natural complex substance (NCS) regulated…”
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Structures and Biosynthetic Pathway of Pulvomycins B–D: 22-Membered Macrolides from an Estuarine Streptomyces sp by Moon, Kyuho, Cui, Jinsheng, Kim, Eunji, Riandi, Evan Setiawan, Park, So Hyun, Byun, Woong Sub, Kal, Youngju, Park, Jun Young, Hwang, Sunghoon, Shin, Daniel, Sun, Jeongyoon, Oh, Ki-Bong, Cha, Sangwon, Shin, Jongheon, Lee, Sang Kook, Yoon, Yeo Joon, Oh, Dong-Chan

“…Pulvomycins B–D (1–3) were discovered from an estuarine Streptomyces strain along with the known pulvomycin (4). The 22-membered macrocyclic lactone structures…”
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Analysis of Nicotine Metabolites in Hair and Nails Using QuEChERS Method Followed by Liquid Chromatography-Tandem Mass Spectrometry by Kim, Junhee, Cho, Hyun-Deok, Suh, Joon Hyuk, Lee, Ji-Youn, Lee, Eunyoung, Jin, Chang Hwa, Wang, Yu, Cha, Sangwon, Im, Hosub, Han, Sang Beom

“…Many studies have analyzed nicotine metabolites in blood and urine to determine the toxicity caused by smoking, and assess exposure to cigarettes. Recently,…”
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Direct Profiling and Imaging of Epicuticular Waxes on Arabidopsis thaliana by Laser Desorption/Ionization Mass Spectrometry Using Silver Colloid as a Matrix by Cha, Sangwon, Song, Zhihong, Nikolau, Basil J, Yeung, Edward S

“…Colloidal silver laser desorption/ionization (LDI) mass spectrometry (MS) was employed to directly profile and image epicuticular wax metabolites on a variety…”
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GC-MS and GC-FID Analysis of Citronella Oil Products for Indicator Ingredient Identification by Sumin Kang, Wooil Kim, Jin Wuk Lee, Sangwon Cha

“…Citronella oil, an essential oil extracted through steam distillation from the leaves and stems of Cymbopogon, is a natural complex substance (NCS) regulated…”
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Direct profiling and imaging of plant metabolites in intact tissues by using colloidal graphite‐assisted laser desorption ionization mass spectrometry by Cha, Sangwon, Zhang, Hui, Ilarslan, Hilal I., Wurtele, Eve Syrkin, Brachova, Libuse, Nikolau, Basil J., Yeung, Edward S.

“…Summary Laser desorption/ionization (LDI)‐based imaging mass spectrometry (MS) has been applied to several biological systems to obtain information about both…”
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Discovery of new indolosesquiterpenoids bearing a N-O linkage by overexpression of LuxR regulator in a marine bacterium Streptomyces sp by Park, Jiyoon, Cho, Hang Su, Moon, Dong Hyun, Lee, Donghoon, Kal, Youngjoo, Cha, Sangwon, Lee, Sang Kook, Yoon, Yeo Joon, Oh, Dong-Chan

“…The xiamycins are bioactive indolosesquiterpenoids that have been isolated from actinobacterial strains belonging to the Streptomyces genus. The overexpression…”
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Antifungal Streptomyces spp. Associated with the Infructescences of Protea spp. in South Africa by Human, Zander R, Moon, Kyuho, Bae, Munhyung, de Beer, Z Wilhelm, Cha, Sangwon, Wingfield, Michael J, Slippers, Bernard, Oh, Dong-Chan, Venter, Stephanus N

“…Common saprophytic fungi are seldom present in infructescences, which is strange given the abundance of mainly dead plant tissue in this moist protected…”
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Multi-class Analysis of Exposure Chemicals in Deciduous Teeth by Liquid Chromatography-Mass Spectrometry: Preliminary Studies on Sample Preparation Methods by Yujin Lee, Eunji Seo, Jun Young Park, Kwang-hak Bae, Jaeick Lee, Sangwon Cha

“…Since accumulation of chemicals in deciduous teeth can occur from the second trimester of fetal development to shedding, a deciduous tooth has been considered…”
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Free Radical Initiated Peptide Sequencing Using MALDI-TOF/TOF Mass Spectrometry by Song, Insu, Lee, Jae-ung, Baek, Jaehyeon, Cha, Sangwon, Han, Sang Yun, Oh, Han Bin

“…In this study, matrix-assisted laser desorption/ionization (MALDI) was applied to the TEMPO-assisted FRIPS for the first time. We found that 3-HPA is the…”
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Analysis of Lipids in Deciduous Teeth by Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry (MALDI MS) by Yujin Lee, Eunji Seo, Tae-min Park, Kwang-hak Bae, Sangwon Cha

“…Recently, deciduous teeth have been proposed as a promising biomatrix for estimating internal and external chemical exposures of an individual from prenatal…”
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Depth-Dependent Chemical Analysis of Handwriting by Nanospray Desorption Electrospray Ionization Mass Spectrometry by Lee, Gwangbin, Cha, Sangwon

“…Nanospray desorption electrospray ionization (nano-DESI) has been utilized in direct sampling mass spectrometry (MS) that requires highly spatially resolved…”
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Ambient desorption/ionization mass spectrometry for direct solid material analysis by Shrestha, Sarmila Amatya, Cha, Sangwon

“…This paper reviews the application of ambient desorption/ionization (ADI) mass spectrometry (MS) to the direct analysis of solid materials. First, ADI methods…”
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