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Journal articles on the topic 'ECD detection'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Lee, Arthur S., Moo-Ki Hong, and Albert E. Smith. "Improved Esterification of Mecoprop for Sensitive Detection on Capillary Gas Chromatography with Mass Selective and Electron Capture Detection." Journal of AOAC INTERNATIONAL 77, no. 5 (1994): 1077–83. http://dx.doi.org/10.1093/jaoac/77.5.1077.

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Abstract Analytical methods for determination of the derivatives of the herbicide mecoprop, (±)-2-(4-chloro-2-methylphenoxy)propionic acid (MCPP), by capillary column gas chromatography with mass selective detection (GC-MSD) and electron capture detection (GC-ECD) were studied. A successful procedure was introduced for the ester preparation using H2SO4 as the catalyst and the alcohols 2,2,2-trichloroethanol (TCE) or 2,2,2-tri-fluoroethanol (TFE). The identification and elucidation of MCPP by GC-MSD following the esterifica-tion with diazomethane, BF3-methanol, H2SO4-methanol, TCE, TFE, or pent

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2

Diamond, Eli L., Elena Pentsova, Laetitia Borsu, April E. Chiu, David Michael Hyman, and Marc Rosenblum. "Detection of the NRAS Q61R mutation in Erdheim-Chester disease." Journal of Clinical Oncology 31, no. 15_suppl (2013): 7120. http://dx.doi.org/10.1200/jco.2013.31.15_suppl.7120.

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7120 Background: There is a high frequency of activating mutations in proteins of the Ras/Raf/MEK/ERK pathway in melanoma and other solid tumors. The BRAF V600E mutation has been found recently to be highly prevalent in ECD, a rare non-Langerhans cell histiocytosis with poor prognosis, as well as Langerhans cell histiocytosis (LCH). Treatment of patients with ECD and the BRAF V600E mutation with vemurafenib has been associated with unprecedented and dramatic response in a few cases. Methods: We present a 66 year-old man evaluated for several months of cognitive and motor decline. He was found

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3

Muñoz, Marcelo A., María A. Bucio, and Pedro Joseph-Nathan. "Chiroptical Studies of Flavanone." Natural Product Communications 8, no. 8 (2013): 1934578X1300800. http://dx.doi.org/10.1177/1934578x1300800810.

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Chiral HPLC coupled to electronic circular dichroism and laser optical rotation detection (HPLC-ECD-OR) permitted the on-line chiroptical characterization of both enantiomers of racemic flavanone (1) as ECD(-)310-OR(-)670-flavanone and ECD(+)310-OR(+)670-flavanone for the first and second eluted peaks, respectively. Calculation of the ECD spectrum of one enantiomer at the TD-DFT/DGTZVP level of theory yielded the ( S)-ECD(-)310-OR(-)670 and ( R)-ECD(+)310-OR(+)670-1 absolute configuration, in agreement with the use of empirical rules for stereochemical assignment. Vibrational circular dichrois

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4

Nunes, Raquel A., Xiaochun Li, Soonmo Peter Kang, et al. "Circulating Tumor Cells in HER-2 Positive Metastatic Breast Cancer Patients Treated with Trastuzumab and Chemotherapy." International Journal of Biological Markers 24, no. 1 (2009): 1–10. http://dx.doi.org/10.1177/172460080902400101.

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The detection of circulating tumor cells (CTCs) in peripheral blood may have important prognostic and predictive implications in breast cancer treatment. A limitation in this field has been the lack of a validated method of accurately measuring CTCs. While sensitivity has improved using RT-PCR, specificity remains a major challenge. The goal of this paper is to present a sensitive and specific methodology of detecting CTCs in women with HER-2-positive metastatic breast cancer, and to examine its role as a marker that tracks disease response during treatment with trastuzumab-containing regimens

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5

HIRAHARA, YOSHICHIKA, YUKARI TSUMURA, YUMIKO NAKAMURA, YASUHIDE TONOGAI, and TADASHI SHIBATA. "Analysis of Phenothrin and Its Metabolite 3-Phenoxybenzoic Acid (PBA) in Agricultural Products by GC and Ion-Trap GC/MS." Journal of Food Protection 60, no. 3 (1997): 305–8. http://dx.doi.org/10.4315/0362-028x-60.3.305.

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A sensitive method for analysis of phenothrin and its metabolite 3-phenoxybenzoic acid (PBA) in agricultural products by gas chromatography with electron capture detection (ECD-GC) and ion-trap gas chromatography/mass spectrometry (GC/MS) with chemical ionization (Cl) was investigated. After phenothrin in vegetables, fruits, potatoes, starches, and tea had been extracted with acetone, or in cereals and beans had been extracted with acetonitrile followed by Florisi! column chromatography, it was reextracted into n-hexane. PBA was determined by ECD-GC after esterification with hexafluoroisopropy

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6

Hideharu, Shintaniq. "Toxic Compounds Analysis With High Performance Liquid Chromatography Detected By Electro Chemical Detector (Ecd)." International Journal of Clinical Pharmacology & Toxicology 3, no. 3 (2014): 121–27. https://doi.org/10.19070/2167-910X-1400022.

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The principal area of application of high performance liquid chromatography-electrochemical detector (HPLC-ECD) has been in the analysis of naturally-occurring analytes, such as catecholamines, and pharmaceuticals in biological samples, HPLC-ECD has also applied to the analysis of pesticides and other analytes of interest to the toxicologist. In this paper, toxic area is described. In these, ammatoxins, aromatic amine, nitro-compounds, algal toxins, fungal toxins, pesticides, veterinary drug and food residues will be concretely described.

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7

Carney, Walter P., Rainer Neumann, Allan Lipton, Kim Leitzel, Suhail Ali, and Christopher P. Price. "Potential Clinical Utility of Serum HER-2/neu Oncoprotein Concentrations in Patients with Breast Cancer." Clinical Chemistry 49, no. 10 (2003): 1579–98. http://dx.doi.org/10.1373/49.10.1579.

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Abstract Background: The HER-2/neu oncogene and its p185 receptor protein are indicators of a more aggressive form of breast cancer. HER-2/neu status guides Herceptin therapy, specifically directed to the extracellular domain (ECD) of the HER-2/neu oncoprotein. The HER-2/neu ECD is shed from cancer cells into the circulation and is measurable by immunoassay. Methods: We performed a systematic review of the peer-reviewed literature on circulating ECD with respect to prevalence, prognosis, prediction of response to therapy, and monitoring of breast cancer. Results: The prevalence of increased EC

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8

Wu, Fanhua, Fangrui Xu, Wen Liu, et al. "A High-Performance Liquid Chromatography with Electrochemical Detection Method Developed for the Sensitive Determination of Ascorbic Acid: Validation, Application, and Comparison with Titration, Spectrophotometric, and High-Performance Liquid Chromatography with Diode-Array Detection Methods." Foods 12, no. 16 (2023): 3100. http://dx.doi.org/10.3390/foods12163100.

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L-ascorbic acid (vitamin C, VC), an essential nutrient obtained from the diet to maintain various vital signs for the human body, is a crucial indicator of food quality and nutritional value. Herein, high-performance liquid chromatography with electrochemical detection (HPLC-ECD) was developed and validated with the advantages of higher sensitivity, simpler operation processes, and more rapid detection in measuring VC levels in honey samples when compared with the common methods (titration, spectrophotometric, and HPLC-DAD methods). The results of the HPLC-ECD methodological validation showed

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9

翟, 志强. "Studies on Detection of Amphetamines by Gas Chromatography/ECD." Hans Journal of Chemical Engineering and Technology 04, no. 06 (2014): 79–85. http://dx.doi.org/10.12677/hjcet.2014.46011.

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10

Thyagarajan, C., S. Vijay Bhanu, and S. Suthir. "Hybrid ECD model for firewall tuning and attack detection." International Journal of Wireless and Mobile Computing 28, no. 1 (2025): 86–102. https://doi.org/10.1504/ijwmc.2025.143030.

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11

Barchańska, Hanna, Marianna Czalicka, and Anna Giemza. "Simultaneous Determination of Selected Insecticides and Atrazine in Soil by Mae–GC–ECD." Archives of Environmental Protection 39, no. 1 (2013): 27–40. http://dx.doi.org/10.2478/aep-2013-0003.

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Abstract The procedure for simultaneous extraction from soil and determination by means of GC-ECD insecticides: aldrin, dieldrin, endrin and herbicide: atrazine was worked out. The proposed GC-ECD technique provides limits of detection in range 12 μg/mL - 18 μg/mL and 2 μg/mL, for insecticides and atrazine, respectively. Two different types of extraction: microwave assisted extraction (MAE) and ultrasound assisted extraction (UAE) with different solvents were tested to choose the procedure that provides the highest recoveries of analytes and low detection limits, typical for trace analysis (10

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12

Liu, Xin-Gang, Feng-Shou Dong, Yong-Quan Zheng, and Yuan-Bo Li. "Determination of Bromoxynil Octanoate in Soil and Corn by GC with Electron Capture and Mass Spectrometry Detection Under Field Conditions." Journal of AOAC INTERNATIONAL 92, no. 3 (2009): 919–26. http://dx.doi.org/10.1093/jaoac/92.3.919.

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Abstract In this paper, a simple, and rapid analysis of bromoxynil octanoate is reported for soil, corn leaves, and corn seeds by utilizing one-step liquid-liquid extraction and partitioning, followed by GC with electron capture (ECD) and mass spectrometry (MS) detection. The method was validated by recovery experiments and assessment of matrix effects. Recoveries for GC-ECD and GC/MS were 82.3110.7 with a relative standard deviation of &lt;14 using matrix-matched calibration solutions for quantification. The limit of quantitation (LOQ) values were 0.005 and 0.2 mg/kg for the ECD and MS de

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13

Abdollahi Yeganeh, Soheil, Arash Dehghan, Javaneh Jahanshahi, Sepehr Shirouei, Mahdi Arjipour, and Shiva Borzouei. "Erdheim-Chester disease; a 31-year-old woman presented with bone pain and ophthalmologic involvement: a case report." Journal of Parathyroid Disease 11 (August 19, 2023): e11209. http://dx.doi.org/10.34172/jpd.2023.11209.

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Erdheim-Chester disease (ECD) is a rare non-Langerhans histiocytic disorder with no actual known incidence rate. It primarily affects multiple organs via increased expression of proinflammatory cytokines, eventually leading to histiocyte activation and infiltration at multiple sites. A 31-year-old virgin female presented with progressive generalized bone pain and blurred vision. She underwent a comprehensive clinical and paraclinical evaluation. Based on the final results, the diagnosis of ECD was established. We started treatment mainly using Interferon-α and corticosteroids, estrogen, levoth

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14

Shahrestani, Shane, Ben A. Strickland, Joshua Bakhsheshian, et al. "Transcranial eddy current damping sensors for detection and imaging of hemorrhagic stroke: feasibility in benchtop experimentation." Neurosurgical Focus 51, no. 1 (2021): E15. http://dx.doi.org/10.3171/2021.4.focus21121.

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OBJECTIVE Spontaneous intracerebral hemorrhage occurs in an estimated 10% of stroke patients, with high rates of associated mortality. Portable diagnostic technologies that can quickly and noninvasively detect hemorrhagic stroke may prevent unnecessary delay in patient care and help rapidly triage patients with ischemic versus hemorrhagic stroke. As such, the authors aimed to develop a rapid and portable eddy current damping (ECD) hemorrhagic stroke sensor for proposed in-field diagnosis of hemorrhagic stroke. METHODS A tricoil ECD sensor with microtesla-level magnetic field strengths was cons

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15

Zang, Yun-Xiao, Han-Zhi Ben, Jing-Hao Qu, et al. "Destructive effects on endothelial cells of grafts in cytomegalovirus DNA-positive patients after keratoplasty." International Journal of Ophthalmology 16, no. 1 (2023): 53–59. http://dx.doi.org/10.18240/ijo.2023.01.08.

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AIM: To investigate corneal graft survival rate and endothelial cell density (ECD) loss after keratoplasty in cytomegalovirus (CMV) positive patients. METHODS: This was a retrospective cohort study. We analyzed the clinical data of patients who underwent viral DNA detection in aqueous humor/corneal tissue collected during keratoplasty from March 2015 to December 2018 at the Peking University Third Hospital, Beijing, China. To further evaluate the effect of CMV on graft survival rate and ECD loss, patients were divided into three groups: 1) CMV DNA positive (CMV+) group; 2) viral DNA negative (

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16

Zhou, Wenjie, Xingyuan Wang, Chuan Zhang, Rui Li, and Chunpeng Wang. "Community detection by enhancing community structure in bipartite networks." Modern Physics Letters B 33, no. 07 (2019): 1950076. http://dx.doi.org/10.1142/s0217984919500763.

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Community detection is one of the primary tools to discover useful information that is hidden in complex networks. Some community detection algorithms for bipartite networks have been proposed from various viewpoints. However, the performance of these algorithms deteriorates when the community structure becomes unclear. Enhancing community structure remains a nontrivial task. In this paper, we propose a community detection algorithm, called ECD, that enhances community structure in bipartite networks. In the proposed ECD, the topology of a network is modified by reducing unnecessary edges that

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17

Frenich, Antonia Garrido, Maria Del Carmen Pablos Espada, Jose Luis Martínez Vidal, and Luis Molina. "Broad-Spectrum Determination of Pesticides in Groundwater by Gas Chromatography with Electron Capture Detection, Nitrogen–Phosphorus Detection, and Tandem Mass Spectrometry." Journal of AOAC INTERNATIONAL 84, no. 6 (2001): 1751–62. http://dx.doi.org/10.1093/jaoac/84.6.1751.

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Abstract Gas chromatography with electron capture detector (ECD), nitrogen–phosphorus detector (NPD), and tandem mass spectrometry (MS/MS) was used to identify 36 pesticides, widely used to control various pest and diseases in vegetables, in water after a preconcentration step on C18 cartridges. The recoveries obtained ranged from 70 to 135% at a fortification level of 100 ng/L with relative standard deviations of &lt;36.2%. The limits of detection and quantitation were ≤48 and ≤160 ng/L, respectively. Important advantages of MS/MS over ECD and NPD in the determination of pesticides are al

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18

Haroche, Julien, Frédéric Charlotte, Laurent Arnaud, et al. "High prevalence of BRAF V600E mutations in Erdheim-Chester disease but not in other non-Langerhans cell histiocytoses." Blood 120, no. 13 (2012): 2700–2703. http://dx.doi.org/10.1182/blood-2012-05-430140.

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Abstract Histiocytoses are rare disorders of unknown origin with highly heterogeneous prognosis. BRAF mutations have been observed in Langerhans cell histiocytosis (LCH). We investigated the frequency of BRAF mutations in several types of histiocytoses. Histology from 127 patients with histiocytoses were reviewed. Detection of BRAFV600 mutations was performed by pyrosequencing of DNA extracted from paraffin embedded samples. Diagnoses of Erdheim-Chester disease (ECD), LCH, Rosai-Dorfman disease, juvenile xanthogranuloma, histiocytic sarcoma, xanthoma disseminatum, interdigitating dendritic cel

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19

Han, Shengli, Tao Zhang, Ting Li, Liyun Kong, Yanni Lv, and Langchong He. "A sensitive HPLC-ECD method for detecting serotonin released by RBL-2H3 cells stimulated by potential allergens." Analytical Methods 7, no. 20 (2015): 8918–24. http://dx.doi.org/10.1039/c5ay02248g.

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20

O'Reilly, Debbie, Marc Nolan, Ausra Teiserskiene, Bryan T. Hennessy, John Crown, and Denis M. Collins. "Abstract 7634: HER2 extracellular domain in serum samples from HER2+ metastatic breast cancer patients as a potential biomarker of progression-free survival." Cancer Research 84, no. 6_Supplement (2024): 7634. http://dx.doi.org/10.1158/1538-7445.am2024-7634.

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Abstract Introduction: The detection of serum biomarkers holds potential for non-invasive methods for early cancer detection, monitoring of disease progression, and assessment of treatment responses leading to earlier interventions that may significantly improve patient outcomes. Human epidermal growth factor receptor 2 (HER2) overexpression plays a key role in the prognosis of HER2+ breast cancer (BC). While HER2 is well-established as a cell surface marker, its soluble extracellular domain (ECD) in serum has gained attention as a potential prognostic biomarker. Elevated levels of HER2 ECD (&

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21

Pescitelli, Gennaro, Lorenzo Di Bari, and Nina Berova. "Application of electronic circular dichroism in the study of supramolecular systems." Chem. Soc. Rev. 43, no. 15 (2014): 5211–33. http://dx.doi.org/10.1039/c4cs00104d.

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Electronic circular dichroism (ECD) is a choice technique for the analysis of chiral supramolecular systems, including their detection, determination of thermodynamic and kinetic quantities, and structural elucidation.

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22

Merib, Josias, Giuliana Nardini, and Eduardo Carasek. "Use of Doehlert design in the optimization of extraction conditions in the determination of organochlorine pesticides in bovine milk samples by HS-SPME." Anal. Methods 6, no. 10 (2014): 3254–60. http://dx.doi.org/10.1039/c4ay00202d.

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23

Freitas, Maria, Henri P. A. Nouws, and Cristina Delerue-Matos. "Electrochemical Sensing Platforms for HER2-ECD Breast Cancer Biomarker Detection." Electroanalysis 31, no. 1 (2018): 121–28. http://dx.doi.org/10.1002/elan.201800537.

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24

Qamar Bhatti, Ali, Muhammad Umer, Syed Hasan Adil, Mansoor Ebrahim, Daniyal Nawaz, and Faizan Ahmed. "Explicit Content Detection System: An Approach towards a Safe and Ethical Environment." Applied Computational Intelligence and Soft Computing 2018 (July 4, 2018): 1–13. http://dx.doi.org/10.1155/2018/1463546.

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An explicit content detection (ECD) system to detect Not Suitable For Work (NSFW) media (i.e., image/ video) content is proposed. The proposed ECD system is based on residual network (i.e., deep learning model) which returns a probability to indicate the explicitness in media content. The value is further compared with a defined threshold to decide whether the content is explicit or nonexplicit. The proposed system not only differentiates between explicit/nonexplicit contents but also indicates the degree of explicitness in any media content, i.e., high, medium, or low. In addition, the system

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25

Xie, Zewen, Zhenyu Ke, Kuigeng Chen, Yinglin Wang, Yadong Tang, and Wenlong Wang. "A Lightweight Deep Learning Semantic Segmentation Model for Optical-Image-Based Post-Harvest Fruit Ripeness Analysis of Sugar Apples (Annona squamosa)." Agriculture 14, no. 4 (2024): 591. http://dx.doi.org/10.3390/agriculture14040591.

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The sugar apple (Annona squamosa) is valued for its taste, nutritional richness, and versatility, making it suitable for fresh consumption and medicinal use with significant commercial potential. Widely found in the tropical Americas and Asia’s tropical or subtropical regions, it faces challenges in post-harvest ripeness assessment, predominantly reliant on manual inspection, leading to inefficiency and high labor costs. This paper explores the application of computer vision techniques in detecting ripeness levels of harvested sugar apples and proposes an improved deep learning model (ECD-Deep

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Bertucci, Carlo, Marco Pistolozzi, Daniele Tedesco, Riccardo Zanasi, Renzo Ruzziconi, and Pietra Anna Maria Di. "Stereochemical characterization of fluorinated 2-(phenanthren-1-yl)propionic acids by enantioselective high performance liquid chromatography analysis and electronic circular dichroism detection." Journal of Chromatography A 1232 (November 9, 2011): 128–33. https://doi.org/10.1016/j.chroma.2011.10.090.

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Accepted Manuscript version. The Published Journal Article is available on the Journal of Chromatography A, Volume 1232, pages 128–133 (DOI: https://doi.org/10.1016/j.chroma.2011.10.090). Supplementary Material available free of charge on the article webpage. © 2011. This Manuscript version is made available under the CC-BY-NC-ND 4.0 license. https://creativecommons.org/licenses/by-nc-nd/4.0/   ABSTRACT Enantioselective high performance liquid chromatography (HPLC) coupled with a detection system based on the simultaneous measurement of UV absorption and electronic circular dic

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27

Wu, Qimei, Jinfen Zheng, Yan Yu, et al. "Analysis of Antioxidant Compounds in Vitex negundo Leaves Using Offline 2D-LC-ECD and LC-MS/MS." Molecules 29, no. 13 (2024): 3133. http://dx.doi.org/10.3390/molecules29133133.

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Vitex negundo has strong antioxidant activity, but its primary antioxidant components are not clear. In this study, the antioxidant components were screened by offline two-dimensional liquid chromatography coupled with electrochemical detection (2D-LC-ECD) and subsequently assessed using liquid chromatography-tandem mass spectrometry (LC-MS/MS) identification, radical scavenging capacity, and molecular docking. Various fractions were isolated from Vitex negundo leaves, and 39 antioxidant components were screened and identified. All of the fractions containing the antioxidant components exhibit

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28

Liu, Caiyun, Lingling Zhao, Zheng Sun, et al. "Determination of three flavor enhancers using HPLC-ECD and its application in detecting adulteration of honey." Analytical Methods 10, no. 7 (2018): 743–48. http://dx.doi.org/10.1039/c7ay02248d.

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In this paper, a simple, sensitive, accurate, high performance liquid chromatography with electrochemical detection (HPLC-ECD) method for the simultaneous determination of maltol, ethyl maltol, and vanillin in honey was developed.

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29

Guiard, Bruno P., and Guillaume Gotti. "The High-Precision Liquid Chromatography with Electrochemical Detection (HPLC-ECD) for Monoamines Neurotransmitters and Their Metabolites: A Review." Molecules 29, no. 2 (2024): 496. http://dx.doi.org/10.3390/molecules29020496.

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This review highlights the advantages of high-precision liquid chromatography with an electrochemical detector (HPLC-ECD) in detecting and quantifying biological samples obtained through intracerebral microdialysis, specifically the serotonergic and dopaminergic systems: Serotonin (5-HT), 5-hydroxyindolacetic acid (5-HIAA), 3,4-dihydroxyphenylacetic acid (DOPAC), dopamine (DA), 3-metoxytryptamin (3-MT) and homovanillic acid (HVA). Recognized for its speed and selectivity, HPLC enables direct analysis of intracerebral microdialysis samples without complex derivatization. Various chromatographic

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30

Karimaei, Mostafa, Kiomars Sharafi, Masoud Moradi, et al. "Optimization of a methodology for simultaneous determination of twelve chlorophenols in environmental water samples using in situ derivatization and continuous sample drop flow microextraction combined with gas chromatography-electron-capture detection." Analytical Methods 9, no. 19 (2017): 2865–72. http://dx.doi.org/10.1039/c7ay00530j.

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Continuous sample drop flow microextraction (CSDFME) combined with gas chromatography-electron-capture detection (GC-ECD) has been developed as a high preconcentration technique for the determination of chlorophenols (CPs) in environmental water samples.

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Hata, Noriko, Seira Takahashi, Sachiko Osada, et al. "In Situ Formation of a Relatively Transparent Ion-Associate Liquid Phase from an Aqueous Phase and Its Application to Microextraction/High-Performance Liquid Chromatography–Fluorescence Detection of Bisphenol A in Water." Molecules 28, no. 22 (2023): 7525. http://dx.doi.org/10.3390/molecules28227525.

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The design of a simple approach enabling the detection of bisphenol A (BPA) in water samples without the need for large amounts of solvents is of utmost importance. This paper reports a simple method for the separation, concentration, and quantification of BPA in water samples using high-performance liquid chromatography with fluorescence detection (HPLC-FLD) after its microextraction into an in situ formed organic ion-associate (IA) liquid phase (LP). Novel IA phase components without conjugated double bonds, such as benzene rings, were investigated. Ethylhexyloxypropylamine hydrochloride and

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32

Wu, Shujie, Wei Wang, Jie Deng, et al. "Nearshore Ship Detection in PolSAR Images by Integrating Superpixel-Level GP-PNF and Refined Polarimetric Decomposition." Remote Sensing 16, no. 6 (2024): 1095. http://dx.doi.org/10.3390/rs16061095.

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Nearshore ship detection has significant applications in both the military and civilian domains. Compared to synthetic aperture radar (SAR), polarimetric synthetic aperture radar (PolSAR) provides richer information for analyzing the scattering mechanisms of ships and enables better detection of ship targets. However, ships in nearshore areas tend to be highly concentrated, and ship detection is often affected by adjacent strong scattering, resulting in false alarms or missed detections. While the GP-PNF detector performs well in PolSAR ship detection, it cannot obtain satisfactory results in

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33

LASRADO, J. A., C. R. SANTERRE, J. R. STAHL, T. NOLTEMEYER, and D. DEARDORFF. "Measurement of Polychlorinated Biphenyls in Fish Tissue by Gas Chromatography with Electron Capture Detection and Enzyme-Linked Immunosorbent Assay." Journal of Food Protection 67, no. 6 (2004): 1209–13. http://dx.doi.org/10.4315/0362-028x-67.6.1209.

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Polychlorinated biphenyls in fish tissue were analyzed by enzyme-linked immunosorbent assay (ELISA) and gas chromatography with electron capture detection (GC/ECD) methods. Fish samples were collected in 2000 and 2001 during an Indiana fish survey. For samples with concentrations ranging from 0.05 to 0.5 ppm (n 5 40) and 0.5 to 5.0 ppm (n 5 12), the ELISA results were not significantly different from GC/ECD (P &lt; 0.05). This research has demonstrated the effectiveness of analysis of fish samples by ELISA in the development of fish consumption advisories that accurately articulate health

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34

Hyman, David M., Eli Diamond, Cecile Rose Vibat, et al. "Prospective Blinded Study of BRAFV600E Mutation Detection in Cell-Free DNA of Patients with Systemic Histiocytic Disorders." Blood 124, no. 21 (2014): 1833. http://dx.doi.org/10.1182/blood.v124.21.1833.1833.

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Abstract Langerhans Cell Histiocytosis (LCH) and Erdheim-Chester Disease (ECD) are systemic histiocytic disorders characterized by infiltration of histiocytes in multiple tissues of the body leading to organ compromise. Although the underlying etiology of these conditions has long been enigmatic, recent investigations have determined that LCH and ECD are clonal disorders of myeloid-derived precursor cells with a high frequency of BRAFV600E mutations (40-60% of patients). Moreover, treatment of BRAF-mutant LCH and ECD patients with the BRAF inhibitor vemurafenib has demonstrated dramatic effica

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35

Lakhani, Priyanka Mayur, Catherine Borysiewicz, and Justin Mason. "Erdheim-Chester disease: a rare cause of bilateral renal artery stenosis, mimicking large vessel vasculitis." BMJ Case Reports 15, no. 3 (2022): e242393. http://dx.doi.org/10.1136/bcr-2021-242393.

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A man in his 50s with resistant hypertension and history of Langerhans cell histiocytosis (LCH) was referred to rheumatology after suspicion of inflammatory arteritis was raised. This followed detection of bilateral renal artery stenosis during investigation for severe hypertension refractory to medical therapy. CT angiography revealed diffuse wall thickening of the abdominal aorta, in keeping with an aortitis. However, there was no serological or clinical evidence suggestive of a vasculitic process. Medical history included cranial diabetes insipidus, subclavian artery stenosis and spinal ste

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36

Amato, Angela D', Isabella Semeraro, and Carlo Bicchi. "Simultaneous Determination of Linuron and Trifluralin Residues in Carrots and Their Pulp by Liquid Chromatography and Gas Chromatography." Journal of AOAC INTERNATIONAL 76, no. 3 (1993): 657–62. http://dx.doi.org/10.1093/jaoac/76.3.657.

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Abstract A simple method is described for determining trifluralin and linuron in carrots and their pulp. Samples are extracted with hexane-ethyl ether (1+1), cleaned up with a disposable Florisil cartridge, and eluted first with hexane-ethyl ether (99 + 1) (for trifluralin), and then with hexane-ethyl ether (3 + 7) (for linuron). Trifluralin is then analyzed by electron capture gas chromatography (GC/ECD), and linuron by GC/ECD and liquid chromatography with ultraviolet detection (LC/UV). Recoveries were determined by spiking untreated carrot and carrot pulp homogenates with trifluralin and li

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Gao, Hui, and Xianjun Du. "ECD-Net: An Effective Cloud Detection Network for Remote Sensing Images." Journal of Computer and Communications 13, no. 01 (2025): 1–14. https://doi.org/10.4236/jcc.2025.131001.

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Ito, Nanako, Hideki Hakamata та Fumiyo Kusu. "Simultaneous determination of β-sitosterol, campesterol, stigmasterol, and brassicasterol in serum by high-performance liquid chromatography with electrochemical detection". Analytical Methods 2, № 2 (2010): 174–79. http://dx.doi.org/10.1039/b9ay00195f.

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Tsigouri, Angeliki, Urania Menkissoglu-Spiroudi, Andreas T. Thrasyvoulou, and Grigorios C. Diamantidis. "Determination of Fluvalinate Residues in Beeswax by Gas Chromatography with Electron-Capture Detection." Journal of AOAC INTERNATIONAL 83, no. 5 (2000): 1225–28. http://dx.doi.org/10.1093/jaoac/83.5.1225.

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Abstract A simple, rapid, and accurate method is described for the determination of residual fluvalinate in beeswax. The procedure consists of partitioning on a disposable column of diatomaceous earth (Extrelut®), followed by chromatographic cleanup on a Florisil cartridge. The final extract is analyzed by capillary gas chromatography with electron-capture detection (GC–ECD). Briefly, wax samples were dissolved in n-hexane, and the solutions were sonicated and transferred to Extrelut columns. The fluvalinate was extracted with acetonitrile, and a portion of the extract was cleaned up on a Flor

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Amin, Thakor A., Sushmeet Blndra, and Rajinder S. Narang. "Evaluation of Passive Samplers for Analysis of Chlorinated Solvents." Journal of AOAC INTERNATIONAL 81, no. 5 (1998): 1027–32. http://dx.doi.org/10.1093/jaoac/81.5.1027.

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Abstract Chlorinated solvents like tetrachloroethylene, chloroform, and trichloroethylene were trapped on commercially available diffusive sampling devices and then desorbed with carbon disulfide (1.5 mL) containing surrogate standards. The extract was analyzed by gas chromatography with electron capture detection (ECD). To overcome the incompatibility of carbon disulfide with the electron capture detector, an electronically driven, high-temperature, 6- port valve was attached to the oven of a the gas chromatograph. An RTX 502 (105 m 𝖷 0.53 mm) capillary column was connected between the inject

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Nabi, Mehdi, Sayed Mehdi Ghoreishi, and Mohsen Behpour. "Determination of Bromate Ions in Drinking Water by Derivatization with 2-Methyl-2-Butene, Dispersive Liquid-Liquid Extraction and Gas Chromatography-Electron Capture Detection." Journal of AOAC INTERNATIONAL 103, no. 5 (2020): 1243–49. http://dx.doi.org/10.1093/jaoacint/qsaa035.

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Abstract Background A simple, rapid, selective and sensitive sample preparation and derivatization method was performed for determination of bromate ions in water by means of dispersive liquid-liquid extraction (DLLE) by gas chromatography-electron capture detection (GC-ECD). This method is based on 2-methyl-2-butene derivatization by bromine produced from bromate ions in acidic medium and extraction by n-hexane. Objective Derivatizing agent: It is cheap and available and it has high efficiency in reaction with Br2. Simplicity: Preparation and extraction process don't need to any specific equi

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Widiastuti, R., and Indraningsih . "Detection of deoxynivalenol and T-2 toxin in feeds by gas chromatography with Electron Captured Detector." Jurnal Ilmu Ternak dan Veteriner 14, no. 3 (2013): 230–36. https://doi.org/10.14334/jitv.v14i3.345.

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Deoxynivalenol (DON) and T-2 toxin are trichothecene mycotoxins produced by Fusarium spp. may pose to threat animal health. This research was aimed to validate an analysis method for DON and T-2 toxin detection in feed using a gas chromatography with electron captured detector ECD (GC-ECD) and to study the contamination level of DON and T-2 toxin in feed. Samples were extracted with organic solvents and derivitized with DMAP and HFBA prior to the detection with GC. Both toxins can be detected simultaneously with satisfied validation with GC. Analysis for DON showed that 17 out of 24 corn sampl

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Matsumoto, Hisashi. "Simultaneous Determination of Imazalil and Its Major Metabolite in Citrus Fruit by Solid-Phase Extraction and Capillary Gas Chromatography with Electron Capture Detection." Journal of AOAC INTERNATIONAL 84, no. 2 (2001): 546–50. http://dx.doi.org/10.1093/jaoac/84.2.546.

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Abstract A method was developed for the simultaneous determination of imazalil and its major metabolite, R 14821, in citrus fruit. This method (designated the SPE method) is based on solid-phase extraction (SPE) and capillary gas chromatography (GC) with electron-capture detection (ECD). The SPE method is highly sensitive for both compounds (limit of detection for each: 0.001 μg/g) and is less time consuming than the previously reported method based on repeated liquid–liquid partitioning and GC–ECD. Recoveries for 3 levels of fortification (0.02, 0.2, and 2.5 μg/g) from satsuma mandarins range

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Bertucci, Carlo, and Daniele Tedesco. "Advantages of electronic circular dichroism detection for the stereochemical analysis and characterization of drugs and natural products by liquid chromatography." Journal of Chromatography A 1269 (September 23, 2012): 69–81. https://doi.org/10.1016/j.chroma.2012.09.046.

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<em>Accepted Manuscript version. The Published Journal Article is available on the </em>Journal of Chromatography A<em>, Volume 1269, pages 69–81 (DOI: </em><em>https://doi.org/10.1016/j.chroma.2012.09.046</em><em>).</em> <em>© 2012. This Manuscript version is made available under the CC-BY-NC-ND 4.0 license. </em><em>https://creativecommons.org/licenses/by-nc-nd/4.0/</em>   ABSTRACT The need for analytical methods for the determination of the enantiomeric excess of chiral compounds increased significantly in the last decades, and enantioselective separation techniques resulted

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Lai-Hao, Wang, and Huang Shu-Juan. "Design of a Flow-Through Voltammetric Sensor Based on an Antimony-Modified Silver Electrode for Determining Lithol Rubine B in Cosmetics." Journal of Automated Methods and Management in Chemistry 2011 (2011): 1–7. http://dx.doi.org/10.1155/2011/896978.

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Lithol Rubine B (LRB; the disodium salt of 3-hydroxy-4-[(4-methyl-2-sulfophenyl) azo]-2-naphthalenecarboxylic acid) was detected using high-performance liquid chromatography with an electrochemical (antimony film on silver) detector (HPLC-ECD). For direct current (DC) mode, with the current at a constant potential, and measurements with suitable experimental parameters, a linear concentration from 0.125 to 1.80 μg/mL was found. The detection limit of our method was approximately 2.0 ng/mL. An antimony-modified silver detector was used to demonstrate that LRB is electrochemically reduced in aci

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Li, Chenghao, Yuhui Fu, Ruihong Ouyang, Yu Liu, and Xinwen Hou. "ADTIDO: Detecting the Tired Deck Officer with Fusion Feature Methods." Sensors 22, no. 17 (2022): 6506. http://dx.doi.org/10.3390/s22176506.

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The incidence of maritime accidents can be significantly reduced by identifying the deck officer’s fatigue levels. The development of car driver fatigue detectors has employing electroencephalogram (EEG)-based technologies in recent years and made it possible to swiftly and accurately determine the level of a driver’s fatigue. However, individual variability and the sensitivity of EEG signals reduce the detection precision. Recently, another type of video-based technology for detecting driver fatigue by recording changes in the drivers’ eye characteristics has also been explored. In order to i

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Alsadig, Ahmed, Behnaz Abbasgholi-NA, Hendrik Vondracek, et al. "DNA-Directed Protein Anchoring on Oligo/Alkanethiol-Coated Gold Nanoparticles: A Versatile Platform for Biosensing Applications." Nanomaterials 13, no. 1 (2022): 78. http://dx.doi.org/10.3390/nano13010078.

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Herein, we report on a smart biosensing platform that exploits gold nanoparticles (AuNPs) functionalized through ssDNA self-assembled monolayers (SAM) and the DNA-directed immobilization (DDI) of DNA-protein conjugates; a novel, high-sensitivity optical characterization technique based on a miniaturized gel electrophoresis chip integrated with online thermal lens spectrometry (MGEC-TLS), for the high-sensitivity detection of antigen binding events. Specifically, we characterized the physicochemical properties of 20 nm AuNPs covered with mixed SAMs of thiolated single-stranded DNA and bio-repel

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Ueshima, Kazuhito, Yoshiaki Minakata, Hisatoshi Sugiura, et al. "The Influence of Free 3-Nitrotyrosine and Saliva on the Quantitative Analysis of Protein-Bound 3-Nitrotyrosine in Sputum." Analytical Chemistry Insights 2 (January 2007): 117739010700200. http://dx.doi.org/10.4137/117739010700200006.

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Background We have recently developed a new technique for quantitatively measuring protein-bound 3-nitrotyrosine (3-NT), a footprint of nitrosative stress, utilizing high-performance liquid chromatography with an electrochemical detection (HPLC-ECD) system. Using this system, we showed that 3-NT formation was upregulated in the sputum of both COPD and asthmatic patients. However, in order to improve the accuracy of the measurement system, We have to resolve some problems which were the influence of free amino acid form of 3-NT and of salivary contamination. Objectives We initially investigated

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Kijewska, Monika, Dorota Gąszczyk, Remigiusz Bąchor, Piotr Stefanowicz, and Zbigniew Szewczuk. "Analysis of Fragmentation Pathways of Peptide Modified with Quaternary Ammonium and Phosphonium Group as Ionization Enhancers." Molecules 26, no. 22 (2021): 6964. http://dx.doi.org/10.3390/molecules26226964.

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Peptide modification by a quaternary ammonium group containing a permanent positive charge is a promising method of increasing the ionization efficiency of the analyzed compounds, making ultra-sensitive detection even at the attomolar level possible. Charge-derivatized peptides may undergo both charge remote (ChR) and charge-directed (ChD) fragmentation. A series of model peptide conjugates derivatized with N,N,N-triethyloammonium (TEA), 1-azoniabicyclo[2.2.2]octane (ABCO), 2,4,6-triphenylopyridinium (TPP) and tris(2,4,6-trimetoxyphenylo)phosphonium (TMPP) groups were analyzed by their fragmen

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Nalesso, Federico, Francesco Garzotto, Ilaria Petrucci, et al. "Standardized Protocol for Hemodialysis Vascular Access Assessment: The Role of Ultrasound and ColorDoppler." Blood Purification 45, no. 1-3 (2018): 260–69. http://dx.doi.org/10.1159/000485590.

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Introduction: Ultrasound and colorDoppler technique, which is relatively inexpensive, rapid, non-invasive and repeatable is a powerful tool used for early diagnosis of vascular access (VA) complications in hemodialysis patients. To date a standard and widely comprehensible echocolorDoppler (ECD) protocol is not available. Materials and Methods: A simple step-by-step protocol based on anatomical and hemodynamic parameters of VA has been developed during a 3-years VA ECD follow-up. It consists of an ECD study scheme. The algorithm created involves the calculation of brachial artery flow, descrip

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