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Ding WH, Li YF, Liu W, Li W, Wu N, Hu SY, Shi JJ. Effect of occlusal stabilisation splint with or without arthroscopic disc repositioning on condylar bone remodelling in adolescent patients. Int J Oral Maxillofac Surg 2024; 53:156-164. [PMID: 37357072 DOI: 10.1016/j.ijom.2023.06.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 06/03/2023] [Accepted: 06/06/2023] [Indexed: 06/27/2023]
Abstract
The aim of this study was to investigate the treatment effects of a stabilisation splint (SS) with and without arthroscopic disc repositioning (ADR) on condylar bone remodelling in adolescent patients with anterior disc displacement without reduction (ADDwoR). Cone beam computed tomography and magnetic resonance imaging were used to analyse condylar bone remodelling, condyle position, and disc position. Twenty-two temporomandibular joints of 14 patients who underwent ADR (age range 12-20 years; mean follow-up 12.5 ± 7.8 months) and 21 temporomandibular joints of 14 patients who did not undergo ADR (age range 13-20 years; mean follow-up 11.1 ± 5.1 months) were included. The change in bone volume (P < 0.001), rate of bone volume change (P < 0.001), and change in condyle height (P = 0.031) were significantly greater in patients with ADR than in those without ADR. The changes in posterior joint space (P = 0.013), superior joint space (P = 0.020), and ratio of condyle sagittal position (P = 0.013) were significantly greater in patients with ADR than in those without ADR. All discs in patients who underwent ADR and one disc in those who did not undergo ADR were backward repositioned. In conclusion, in adolescent patients with ADDwoR, ADR with SS therapy achieved better condyle and disc position than SS therapy alone, and also induced bone generation.
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Affiliation(s)
- W H Ding
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Y F Li
- The First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine), Hangzhou, Zhejiang, China
| | - W Liu
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, Zhejiang, China
| | - W Li
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, Zhejiang, China
| | - N Wu
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, Zhejiang, China
| | - S Y Hu
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, Zhejiang, China
| | - J J Shi
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, Zhejiang, China.
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Qiu YY, Ding WH. Mechanochemically synthesized zeolitic imidazolate framework-8 as sorbent for dispersive solid-phase extraction of benzophenone-type ultraviolet filters in aqueous samples. J Chromatogr A 2022; 1681:463443. [DOI: 10.1016/j.chroma.2022.463443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 08/20/2022] [Accepted: 08/22/2022] [Indexed: 11/29/2022]
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3
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Liu L, Ding WH. [Heart failure with improved left ventricular ejection fraction]. Zhonghua Nei Ke Za Zhi 2022; 61:584-587. [PMID: 35488614 DOI: 10.3760/cma.j.cn112138-20211126-00847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Affiliation(s)
- L Liu
- Department of Cardiology, Peking University First Hospital, Beijing 100034, China
| | - W H Ding
- Department of Cardiology, Peking University First Hospital, Beijing 100034, China
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4
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Hsu CJ, Ding WH. Determination of benzotriazole and benzothiazole derivatives in tea beverages by deep eutectic solvent-based ultrasound-assisted liquid-phase microextraction and ultrahigh-performance liquid chromatography-high resolution mass spectrometry. Food Chem 2022; 368:130798. [PMID: 34411854 DOI: 10.1016/j.foodchem.2021.130798] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 07/02/2021] [Accepted: 08/04/2021] [Indexed: 11/27/2022]
Abstract
Benzotriazole (BTRs) and benzothiazole (BTHs) derivatives are a group of high production volume chemicals with emerging health concern, which found in tea beverages raising potential risks for food safety and human health. The present work describes a simple method using a "green" deep eutectic solvent (DES) based-ultrasound-assisted liquid-phase microextraction (UALPME) to rapidly extract BTRs and BTHs from tea beverages, and then applying UHPLC-electrospray ionization (+)-quadrupole time-of-flight mass spectrometry for detection and quantification. To overcome the challenges related to different experimental conditions, a Factorial Multilevel Categoric Design and a Face Centered Central Composite Design were applied to screen and optimize the parameters for the DES-UALPME procedure, respectively. After optimization, the method was validated and shown to possess low limits of quantification (LOQs; 1.5-12 ng mL-1), high precision (3-13%), and satisfactory accuracy (65-107%). The developed method was then successfully applied for the analysis of some selected BTRs and BTHs in tea beverages.
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Affiliation(s)
- Che-Jui Hsu
- Department of Chemistry, National Central University, Chung-Li 320, Taiwan
| | - Wang-Hsien Ding
- Department of Chemistry, National Central University, Chung-Li 320, Taiwan.
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5
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Li YJ, Ding WH. Determination of benzotriazole and benzothiazole derivatives in human urine by eco-friendly deep eutectic solvent-based ultrasound-assisted liquid-liquid microextraction followed by ultrahigh performance liquid chromatography quadrupole-time-of-flight mass spectrometry. Environ Pollut 2021; 284:117530. [PMID: 34261225 DOI: 10.1016/j.envpol.2021.117530] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2021] [Revised: 05/28/2021] [Accepted: 06/01/2021] [Indexed: 06/13/2023]
Abstract
Benzotriazole (BTRs) and benzothiazole (BTHs) derivatives have been classified as high production volume pollutants of emerging concern. The present work describes a rapid and simple process using an eco-friendly deep eutectic solvent (DES) based-ultrasound-assisted liquid-liquid microextraction (DES-UALLME) technique to effectively extract five BTRs and four BTHs in human urine samples, and then applying ultrahigh-performance liquid chromatography and electrospray ionization (+)-quadrupole time-of-flight mass spectrometry (UHPLC-ESI(+)-QTOF-MS) for their detection and quantification. DESs are a group of novel "green" solvents, and their applications in sample pretreatment are appropriate for the requirements for green chemistry, environmental protection and sustainable development. Furthermore, to overcome the challenges related to different experimental conditions, multivariate experimental design approaches conducted by means of a multilevel categorical design and a Box-Behnken Design were applied to screen and optimize parameters that have significant influences on the extraction efficiency of DES-UALLME. After optimization, the method was validated and shown to possess low limits of quantitation (LOQs; 0.4 - 9 ng mL-1), high precision (3-12%), and high accuracy (mean spiked recoveries; 80-101%). The developed method was then successfully applied for the analysis of BTRs and BTHs in human urine samples. Interestingly, 5,6-dimethyl-1H-benzotriazole (XTR) was detected in almost all of the urine samples, which correlates with its high production and widely applications in industry processes and consumer products in Taiwan. These target analytes could potentially be used as biomarkers to assess exposure of BTRs and BTHs in biomonitoring programs and studies.
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Affiliation(s)
- Yen-Jou Li
- Department of Chemistry, National Central University, Chung-Li, 320, Taiwan
| | - Wang-Hsien Ding
- Department of Chemistry, National Central University, Chung-Li, 320, Taiwan.
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Hsieh CZ, Chung WH, Ding WH. Experimental design approaches to optimize ultrasound-assisted simultaneous-silylation dispersive liquid-liquid microextraction for the rapid determination of parabens in water samples. RSC Adv 2021; 11:23607-23615. [PMID: 35479786 PMCID: PMC9036600 DOI: 10.1039/d1ra04195a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Accepted: 06/30/2021] [Indexed: 12/15/2022] Open
Abstract
This work describes a rapid solvent-minimized process to effectively determine four common paraben preservatives (methyl-, ethyl-, propyl- and butyl-paraben) in surface water samples. The method involved the use of a combination of a novel ultrasound-assisted simultaneous-silylation within dispersive liquid–liquid microextraction (UASS-DLLME) with detection by gas chromatography-tandem mass spectrometry (GC-MS/MS). To overcome the challenges related to the different experimental conditions, multivariate experimental design approaches conducted by means of a multilevel categorical design and a Box–Behnken design were utilized to screen and optimize parameters that have significant influences on the efficiency of silylation and extraction. The method was then validated and shown to provide low limits of quantitation (LOQs; 1–5 ng L−1), high precision (3–11%), and satisfactory mean spiked recoveries (accuracy; 79–101%). Upon analyzing samples of surface water obtained from the field, we found that, in total, there was a relatively high concentration of the target parabens ranging from 200 to 1389 ng L−1. The sources of the elevated levels of these parabens may be from the release of untreated municipal wastewater in this region, and also due to the widespread application of parabens in personal care and food products. This work describes a rapid solvent-minimized process to effectively determine four common paraben preservatives (methyl-, ethyl-, propyl- and butyl-paraben) in surface water samples.![]()
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Affiliation(s)
- Chi-Zhong Hsieh
- Department of Chemistry, National Central University Chung-Li 320 Taiwan +886-3-4227664 +886-3-4227151 ext. 65905
| | - Wu-Hsun Chung
- Department of Chemistry, National Central University Chung-Li 320 Taiwan +886-3-4227664 +886-3-4227151 ext. 65905.,Department of Chemical Engineering, Army Academy ROC Chung-Li 320 Taiwan
| | - Wang-Hsien Ding
- Department of Chemistry, National Central University Chung-Li 320 Taiwan +886-3-4227664 +886-3-4227151 ext. 65905
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Ao YT, Chen YC, Ding WH. Deep eutectic solvent-based ultrasound-assisted emulsification microextraction for the rapid determination of benzotriazole and benzothiazole derivatives in surface water samples. J Hazard Mater 2021; 401:123383. [PMID: 32763686 DOI: 10.1016/j.jhazmat.2020.123383] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2020] [Revised: 05/28/2020] [Accepted: 07/02/2020] [Indexed: 06/11/2023]
Abstract
This work describes a simple and environmental-friendly method for the simultaneous determination of five benzotriazole derivatives (BTRs) and four benzothiazole derivatives (BTs) that are frequently found in surface water. The target analytes were efficiently extracted from water samples using a "green" deep eutectic solvent (DES) as the extraction solvent based- ultrasound-assisted emulsification microextraction (DES-USAEME), and their determination were performed by ultrahigh-performance liquid chromatography and electrospray ionization (+)-quadrupole time-of-flight mass spectrometry (UHPLC-ESI(+)-QToF-MS). The DES was composed of a mixture of choline chloride and phenol (molar ratio 1:2). The DES-USAEME factors were optimized by a Box-Behnken Design coupled response surface methodology. The developed method was validated, providing limits of quantitation (LOQs; 02 μg L-1), high precisions (1-8%), and satisfactory mean spiked recoveries (72-104 %). Relatively high total concentrations of the target analytes were found in samples collected from a reservoir (47.2-101.3 μg L-1), which may have been released from tire-wear particles and scrap tires from buses and old tires that were strung alongside the shuttle boats to prevent the boats from coming into contact with each other or from impacting against the dock during docking. This is the first study on the occurrence of BTRs and BTs in reservoir samples.
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Affiliation(s)
- Yi-Ting Ao
- Department of Chemistry, National Central University, Chung-Li 320, Taiwan
| | - Yung-Chih Chen
- Department of Chemistry, National Central University, Chung-Li 320, Taiwan
| | - Wang-Hsien Ding
- Department of Chemistry, National Central University, Chung-Li 320, Taiwan.
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Chen CH, Chung WH, Ding WH. Determination of benzotriazole and benzothiazole derivatives in marketed fish by double-vortex-ultrasonic assisted matrix solid-phase dispersion and ultrahigh-performance liquid chromatography-high resolution mass spectrometry. Food Chem 2020; 333:127516. [PMID: 32683261 DOI: 10.1016/j.foodchem.2020.127516] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 06/17/2020] [Accepted: 07/05/2020] [Indexed: 11/26/2022]
Abstract
Benzotriazoles (BTRs) and benzothiazoles (BTs) are two groups of emerging concern and high production volume contaminants. Via the biomagnification of the food web, they could jeopardize human health. In this work, rapid determining the presence of five BTRs and two BTs in marketed fish was performed by a novel double-vortex-ultrasonic assisted matrix solid-phase dispersion (DVUA-MSPD) and UHPLC-electrospray ionization (+)-quadrupole time-of-flight mass spectrometry detection. Unlike traditional MSPD, we simplified the method without the use of mortar/pestle and SPE-column procedures. The DVUA-MSPD factors were screened by a multilevel categorical design, and then optimized by Box-Behnken Design plus with response surface methodology. The limits of quantification were 0.15-2 ng g-1 (dry weight). The satisfactory average recovery ranged from 70% to 93% with RSDs less than 9%. The developed method was successfully applied for the rapid determination of selected BTRs and BTs in fish samples at trace-level.
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Affiliation(s)
- Chien-Hao Chen
- Department of Chemistry, National Central University, Chung-Li 320, Taiwan
| | - Wu-Hsun Chung
- Department of Chemistry, National Central University, Chung-Li 320, Taiwan; Department of Chemical Engineering, Army Academy ROC, Chung-Li 320, Taiwan
| | - Wang-Hsien Ding
- Department of Chemistry, National Central University, Chung-Li 320, Taiwan.
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Wen HJ, Chang TC, Ding WH, Tsai SF, Hsiung CA, Wang SL. Exposure to endocrine disruptor alkylphenols and the occurrence of endometrial cancer. Environ Pollut 2020; 267:115475. [PMID: 33254616 DOI: 10.1016/j.envpol.2020.115475] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 07/30/2020] [Accepted: 08/11/2020] [Indexed: 06/12/2023]
Abstract
Exposure to environmental chemicals with oestrogenic effects has been associated with the development of endometrial cancer (EMCa). EMCa has become the most commonly diagnosed cancer of the female genital tract. To further understand the potential association between exposure to environmental endocrine disruptors and the occurrence of EMCa, we performed a case-control study between 2011 and 2014. We aimed to detect and compare concentrations of a known hormone disruptor, alkylphenol, between women diagnosed with either EMCa or uterine leiomyoma, and those who did not have either of these. Subjects were women diagnosed with either EMCa or uterine leiomyoma (LM) and healthy controls. A structured questionnaire was administered to collect information on lifestyle and health status. Gas chromatography/mass spectrometry was used to measure urinary NP and OP concentrations in participants. Multiple regression analysis was used to examine the association between exposure and outcomes. Overall, 397 women were recruited, including 49 with EMCa, 247 with LM, and 101 controls. Among them, 73.6% showed detectable levels of NP and 61.0% showed detectable levels of OP. The EMCa group had a significantly higher NP concentration than the control group. Higher OP concentrations were also found in participants with EMCa than those with LM and controls. In addition, women in the upper tertile of the NP group had a significantly increased risk of EMCa occurrence (odds ratio [95% confidence interval] = 4.47 [1.69-11.84] for EMCa vs. control). The same was found in the group of women with more than the median level of OP (odds ratio [95% confidence interval] = 4.32 [2.01-9.30] for EMCa vs. LM). Stratification of pre- and post-menopausal groups resulted in a similar association. The results show that NP/OP exposure is associated with EMCa. Further investigations and exposure minimisation are suggested.
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Affiliation(s)
- Hui-Ju Wen
- National Institute of Environmental Health Sciences, National Health Research Institutes, Miaoli, Taiwan
| | - Ting-Chang Chang
- Department of Obstetrics and Gynaecology, Chang-Gung Memorial Hospital, Taipei, Taiwan
| | - Wang-Hsien Ding
- Department of Chemistry, National Central University, Taoyuan, Taiwan
| | - Shih-Fen Tsai
- National Institute of Environmental Health Sciences, National Health Research Institutes, Miaoli, Taiwan
| | - Chao A Hsiung
- Institute of Population Health Sciences, National Health Research Institutes, Miaoli, Taiwan
| | - Shu-Li Wang
- National Institute of Environmental Health Sciences, National Health Research Institutes, Miaoli, Taiwan; Institute of Environmental Medicine, College of Public Health, China Medical University and Hospital, Taichung, Taiwan; Department of Public Health, National Defense Medical Center, Taipei, Taiwan; Department of Safety, Health, and Environmental Engineering, National United University, Miaoli, Taiwan.
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Yang CJ, Chung WH, Ding WH. Optimization of double-vortex-assisted matrix solid-phase dispersion for the rapid determination of paraben preservative residues in leafy vegetables. RSC Adv 2020; 10:35557-35564. [PMID: 35515645 PMCID: PMC9056883 DOI: 10.1039/d0ra05658h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 09/19/2020] [Indexed: 11/28/2022] Open
Abstract
The extensive use of preservatives during the growth, transport and storage of vegetables has been a concern because of their known or suspected toxicity that jeopardizes human health. This paper reports the development of a technique that rapidly determines the presence of five paraben preservative residues in leafy vegetables using double-vortex-assisted matrix solid-phase dispersion (DVA-MSPD) and UHPLC-electrospray ionization(-)-quadrupole time-of-flight mass spectrometry detection. We simplified the original MSPD technique by eliminating the use of mortar/pestle and SPE-column procedures. The DVA-MSPD factors were screened by a multilevel categorical design, and then optimized by Box-Behnken Design plus response surface methodology. The limits of quantification were 1.2-1.8 ng g-1 (dry weight). The satisfactory average recoveries were 85-104% with RSDs less than 10%. The developed method was successfully employed for the rapid determination of selected paraben residues at trace-level in leafy vegetable samples.
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Affiliation(s)
- Chun-Ju Yang
- Department of Chemistry, National Central University Chung-Li 320 Taiwan +886-3-4227664 +886-3-4227151 ext. 65905
| | - Wu-Hsun Chung
- Department of Chemistry, National Central University Chung-Li 320 Taiwan +886-3-4227664 +886-3-4227151 ext. 65905
- Department of Chemical Engineering, Army Academy ROC Chung-Li 320 Taiwan
| | - Wang-Hsien Ding
- Department of Chemistry, National Central University Chung-Li 320 Taiwan +886-3-4227664 +886-3-4227151 ext. 65905
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Chen YC, Ao YT, Ding WH. Determination of microcystins in water samples by deep eutectic solvent-based vortex-assisted liquid–liquid microextraction coupled with ultrahigh-performance liquid chromatography-high resolution mass spectrometry. RSC Adv 2019; 9:38669-38676. [PMID: 35540236 PMCID: PMC9075955 DOI: 10.1039/c9ra07544e] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 11/20/2019] [Indexed: 11/21/2022] Open
Abstract
An eco-friendly and efficient DES-based VALLME coupled UHPLC-ESI(+)-qTOF-MS method was developed to determine MC-YR and MC-LR in surface water samples.
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Affiliation(s)
- Yung-Chih Chen
- Department of Chemistry
- National Central University
- Taiwan
| | - Yi-Ting Ao
- Department of Chemistry
- National Central University
- Taiwan
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Chung SH, Ding WH. Isotope-dilution gas chromatography-mass spectrometry coupled with injection-port butylation for the determination of 4-t-octylphenol, 4-nonylphenols and bisphenol A in human urine. J Pharm Biomed Anal 2018; 149:572-576. [DOI: 10.1016/j.jpba.2017.11.063] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 11/14/2017] [Accepted: 11/26/2017] [Indexed: 01/25/2023]
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Zhou HT, Chen HC, Ding WH. Accurate analysis of parabens in human urine using isotope-dilution ultrahigh-performance liquid chromatography-high resolution mass spectrometry. J Pharm Biomed Anal 2018; 150:469-473. [DOI: 10.1016/j.jpba.2017.12.038] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 12/18/2017] [Accepted: 12/19/2017] [Indexed: 11/29/2022]
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Chu SY, Ding WH. [Cardiac cephalgia]. Zhonghua Nei Ke Za Zhi 2017; 56:951-953. [PMID: 29202540 DOI: 10.3760/cma.j.issn.0578-1426.2017.12.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
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Guo YM, Ding EMC, Ding WH. Rapid Screening of Haloacetonitriles in Water Samples by Optimized Vortex-assisted Liquid-Liquid Microextraction. J CHIN CHEM SOC-TAIP 2017. [DOI: 10.1002/jccs.201700194] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yi-Min Guo
- Department of Chemistry; National Central University; Chung-Li 320 Taiwan
| | | | - Wang-Hsien Ding
- Department of Chemistry; National Central University; Chung-Li 320 Taiwan
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Ding WH, Li W, Chen XY, Shi JJ. [The study of genistein attenuating genioglossus muscle fatigue under chronic intermittent hypoxia]. Zhonghua Kou Qiang Yi Xue Za Zhi 2017; 51:46-50. [PMID: 26792188 DOI: 10.3760/cma.j.issn.1002-0098.2016.01.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To investigate the effects of genistein on genioglossus muscle function and nuclear factor erythroid 2 related factor 2(Nrf-2)/antioxidant responsive element(ARE) signaling pathway in rats under chronic intermittent hypoxia(CIH) condition in order to find medication treatment of obstructive sleep apnea/hyponea syndrome. METHODS Thirty female Sprague-Dawley(SD) rats (8 weeks old) were randomly(random number table) divided into three groups 1 week after ovariectomy: control group(NC group), CIH group, and CIH+genistein treatment group(T group). Rats in the latter two groups were exposed to CIH for 8 h/d for 5 weeks. Electrophysiological method was used to detect the change of genioglossus muscle function, and real-time reverse transcription(RT)-PCR and Western blotting were used to determine the level of Nrf-2 gene and protein. RESULTS Compared to NC group, the contractive properties of genioglossus muscle fatigue test at every time set was significantly decreased in CIH group(P<0.05). Compared to CIH group, the contractive properties was significantly increased in T group(P<0.05). The level of Nrf-2 gene and protein were less in CIH group(0.54±0.11 and 0.35±0.13) than in NC group(1.00±0.001.00±0.00)(P<0.05). Compared to CIH group the level of Nrf-2 gene and protein were increased in T group (0.76 ± 0.16 and 0.63 ± 0.14) (P<0.05), however, it was still less than the level in NC group(P<0.05). CONCLUSIONS CIH attenuates genioglossus muscle fatigue resistance under chronic intermittent hypoxia through Nrf-2/ARE signaling pathway. Genistein protects genioglossus muscle function through up-regulation of the level of Nrf-2 gene and protein.
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Affiliation(s)
- W H Ding
- Department of Orthodontics, Hospital of Stomatology, College of Medicine, Zhejiang University, Hangzhou 310006, China
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Hui-Ting Z, Ding EM, Ding WH. Determination of parabens in human urine by optimal ultrasound-assisted emulsification microextraction and on-line acetylation gas chromatography–mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2017; 1058:14-18. [DOI: 10.1016/j.jchromb.2017.05.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Revised: 04/28/2017] [Accepted: 05/06/2017] [Indexed: 10/19/2022]
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Djatmika R, Hsieh CC, Chen JM, Ding WH. Determination of paraben preservatives in seafood using matrix solid-phase dispersion and on-line acetylation gas chromatography−mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1036-1037:93-99. [DOI: 10.1016/j.jchromb.2016.10.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2016] [Revised: 10/03/2016] [Accepted: 10/07/2016] [Indexed: 11/25/2022]
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19
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Chen TH, Wu YT, Ding WH. UV-filter benzophenone-3 inhibits agonistic behavior in male Siamese fighting fish (Betta splendens). Ecotoxicology 2016; 25:302-309. [PMID: 26589946 DOI: 10.1007/s10646-015-1588-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/10/2015] [Indexed: 06/05/2023]
Abstract
Benzophenone-3 (BP-3) is a widely used organic UV-filter compound. Despite the frequent occurrence of BP-3 in aquatic environments, little is known about its effect on fish behavior. The aim of this study was to investigate the endocrine disrupting effects of BP-3 in male fighting fish (Betta splendens) with a focus on agonistic behavior. Male fighting fish were exposed to 10, 100, and 1000 μg/L BP-3, as well as a solvent control (0.1% ethanol) and a positive control (100 ng/L 17α-ethynylestradiol, EE2), for 28 days. At the beginning and the end of exposure, standard length and body mass of the fish were measured for calculating the condition factor (CF). In addition, spontaneous swimming activity (total distance moved) and agonistic behavior (maximum velocity and duration of opercular display in front of a mirror) were also quantified. At the end of exposure, the fish gonads were sampled for gonadosomatic index (GSI) measurement and histology. After the exposure, CF was significantly decreased in the 1000 μg/L BP-3 groups. Spontaneous swimming activity was not affected. However, maximum velocity was significantly reduced in the EE2 and 1000 μg/L BP-3 treatments; duration of opercular display was significantly decreased in the EE2 and 10 and 1000 μg/L BP-3 treatments. GSI was not significantly different between groups. There was a slight but statistically significant decrease of relative proportion of mature spermatozoa in testicular tissue in the 100 μg/L BP-3 treatment. Collectively, our results demonstrate that BP-3 can disrupt agonistic behavior of male fighting fish, indicating the endocrine disrupting activity of this compound.
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Affiliation(s)
- Te-Hao Chen
- National Museum of Marine Biology and Aquarium, 2 Houwan Rd., Checheng, Pingtung, Taiwan.
- Institute of Marine Biology, National Dong Hwa University, 2 Houwan Rd., Checheng, Pingtung, Taiwan.
| | - Yea-Ting Wu
- Institute of Marine Biology, National Dong Hwa University, 2 Houwan Rd., Checheng, Pingtung, Taiwan
| | - Wang-Hsien Ding
- Department of Chemistry, National Central University, 300, Jhongda Rd., Jhongli, Taoyuan, Taiwan
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20
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Chen JM, Yang CC, Chung WH, Ding WH. Vortex-homogenized matrix solid-phase dispersion coupled with gas chromatography – electron-capture negative-ion mass spectrometry to determine halogenated phenolic compounds in seafood. RSC Adv 2016. [DOI: 10.1039/c6ra20680h] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This work represents the development of vortex-homogenized matrix solid-phase dispersion (VH-MSPD) as an effective and simple method to rapidly extract halogenated phenolic compounds in marketed seafood samples.
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Affiliation(s)
- Jhih-Ming Chen
- Department of Chemistry
- National Central University
- Chung-Li 320
- Taiwan
| | - Chun-Chuan Yang
- Department of Chemistry
- National Central University
- Chung-Li 320
- Taiwan
| | - Wu-Hsun Chung
- Department of Chemistry
- National Central University
- Chung-Li 320
- Taiwan
- Department of Chemical Engineering
| | - Wang-Hsien Ding
- Department of Chemistry
- National Central University
- Chung-Li 320
- Taiwan
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21
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Chang CY, Chung WH, Ding WH. Vortex-assisted liquid-liquid microextraction for the rapid screening of short-chain chlorinated paraffins in water. J Sep Sci 2015; 39:427-32. [DOI: 10.1002/jssc.201500991] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Revised: 10/31/2015] [Accepted: 11/07/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Chia-Yu Chang
- Department of Chemistry; National Central University; Chung-Li 320 Taiwan
| | - Wu-Hsun Chung
- Department of Chemistry; National Central University; Chung-Li 320 Taiwan
| | - Wang-Hsien Ding
- Department of Chemistry; National Central University; Chung-Li 320 Taiwan
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22
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Chung WH, Tzing SH, Ding WH. Optimization of dispersive micro solid-phase extraction for the rapid determination of benzophenone-type ultraviolet absorbers in aqueous samples. J Chromatogr A 2015; 1411:17-22. [DOI: 10.1016/j.chroma.2015.07.106] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 07/29/2015] [Accepted: 07/31/2015] [Indexed: 10/23/2022]
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23
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Ding WH, Li W, Chen F, Zhang JF, Lv Y, Chen XY, Lin WW, Fu Z, Shi JJ. Comparison of molar intrusion efficiency and bone density by CT in patients with different vertical facial morphology. J Oral Rehabil 2014; 42:355-62. [PMID: 25515652 DOI: 10.1111/joor.12261] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/16/2014] [Indexed: 11/29/2022]
Abstract
The purpose of this study is to examine the relationship between molar intrusion efficiency and bone density in patients with different vertical facial morphology. Thirty-six female patients, with overerupted upper first molars, were divided into two groups according to mandiblular plane angle (FH-MP): hyperdivergent, FH-MP>30° (G1), hypodivergent, FH-MP<22° (G2). Mini-screw implants with elastic chains were used to intrude upper first molars. Spiral CT was used to measure the intrusion degree of upper first molar and bone density, and molar intrusion efficiency was calculated as amount/duration (mm month(-1) ). In addition, each tooth was divided into three portions (cervical, furcation and apical) to measure the bone density. It was found in this study that treatment duration was 3·13 and 4·71 months in G1 and G2 and that the intrusion efficiency was 1·57 and 0·81 in G1 and G2 with significant difference (P < 0·05). There were significant differences in cervical, furcation and apical bone density between two groups (P < 0·05). The bone density was significantly reduced after molar intrusion. In addition, the bone density change was greater in G1 than in G2 (P < 0·05). It was concluded that molars were more easily to be intruded in hyperdivergent than in hypodivergent patients. The difference of bone density and bone density changes during intrusion may account for the variation of molar intrusion efficiency.
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Affiliation(s)
- W H Ding
- Department of Orthodontics, School of Stomatology affiliated to Medical College, Zhejiang University, Hangzhou City, China
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24
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Tsai DY, Chen CL, Ding WH. Optimization of matrix solid-phase dispersion for the rapid determination of salicylate and benzophenone-type UV absorbing substances in marketed fish. Food Chem 2014; 154:211-6. [DOI: 10.1016/j.foodchem.2014.01.013] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2013] [Revised: 09/03/2013] [Accepted: 01/06/2014] [Indexed: 11/28/2022]
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25
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Chung WH, Tzing SH, Huang MC, Ding WH. Dispersive Micro Solid-phase Extraction Coupled with Ultrasound-assisted Solvent Desorption for Determination of Synthetic Polycyclic and Nitro-aromatic Musks in Aqueous Samples. J CHIN CHEM SOC-TAIP 2014. [DOI: 10.1002/jccs.201300666] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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26
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Chen HC, Kuo HW, Ding WH. Determination of Carbon-based Engineered Nanoparticles in Marketed Fish by Microwave-assisted Extraction and Liquid Chromatography-atmospheric Pressure Photoionization-tandem Mass Spectrometry. J CHIN CHEM SOC-TAIP 2014. [DOI: 10.1002/jccs.201300356] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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27
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Shu WC, Ding WH. Determination of Fluorescent Whitening Agents in Infant Clothes and Paper Materials by Ion-Pair Chromatography and Fluorescence Detection. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200900118] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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28
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Liu HY, Ding WH. Trace Determination of Benzalkonium Chlorides in River and Wastewater by Capillary Electrophoresis following Solid-Phase Extraction Coupled with Salting-Out Extraction. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200800153] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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29
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Jhong YJ, Ding WH. Determination of Polybrominated Diphenyl Ethers in Coastal and River Sediments by Pressurized Liquid Extraction Coupled with Gas Chromatography-Mass Spectrometry. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200800050] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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30
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Cheng CY, Liu LL, Ding WH. Determination of Xenoestrogens Alkylphenols in Oyster and Snail Tissues by Extractive Steam Distillation and Gas Chromatography-Mass Spectrometry. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200500181] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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31
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Ding WH, Wu CY. Determination of Estrogenic Nonylphenol and Bisphenol a in River Water by Solid-Phase Extraction and Gas Chromatography-Mass Spectrometry. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200000155] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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32
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Liu CH, Ding WH. Determination of Naphthalenesulfonate Isomers in Industrial Effluents and River Water by Solid-Phase Extraction and Capillary Zone Electrophoresis. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200200054] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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33
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Wu MW, Yeh PC, Chen HC, Liu LL, Ding WH. A Microwave-assisted Headspace Solid-phase Microextraction for Rapid Determination of Synthetic Polycyclic and Nitro-aromatic Musks in Fish Samples. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.201300029] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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34
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Wu YP, Wang YC, Ding WH. Rapid determination of alkylphenols in aqueous samples by in situ acetylation and microwave-assisted headspace solid-phase microextraction coupled with gas chromatography-mass spectrometry. J Sep Sci 2012; 35:2122-30. [DOI: 10.1002/jssc.201200146] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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35
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Wu SF, Liu LL, Ding WH. One-step microwave-assisted headspace solid-phase microextraction for the rapid determination of synthetic polycyclic musks in oyster by gas chromatography–mass spectrometry. Food Chem 2012; 133:513-7. [DOI: 10.1016/j.foodchem.2012.01.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2010] [Revised: 12/02/2011] [Accepted: 01/14/2012] [Indexed: 10/14/2022]
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36
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Chiang TL, Wang YC, Ding WH. Trace Determination of Rhodamine B and Rhodamine 6G Dyes in Aqueous Samples by Solid-phase Extraction and High-performance Liquid Chromatography Coupled with Fluorescence Detection. J CHIN CHEM SOC-TAIP 2012. [DOI: 10.1002/jccs.201100318] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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37
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Wang YC, Lin AYC, Wang SL, Ding WH. Determination of Perfluorochemicals in Human Milk Using Isotope-dilution Liquid Chromatography Tandem Mass Spectrometry. J CHIN CHEM SOC-TAIP 2012. [DOI: 10.1002/jccs.201100528] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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38
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Chen HC, Ding WH. Determination of aqueous fullerene aggregates in water by ultrasound-assisted dispersive liquid–liquid microextraction with liquid chromatography–atmospheric pressure photoionization-tandem mass spectrometry. J Chromatogr A 2012; 1223:15-23. [DOI: 10.1016/j.chroma.2011.12.034] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2011] [Revised: 12/07/2011] [Accepted: 12/08/2011] [Indexed: 10/14/2022]
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39
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Ho YC, Ding WH. Solid-phase Extraction Coupled Simple On-line Derivatization Gas Chromatography - Tandem Mass Spectrometry for the Determination of Benzophenone-type UV Filters in Aqueous Samples. J CHIN CHEM SOC-TAIP 2012. [DOI: 10.1002/jccs.201100317] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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40
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Cheng CY, Wang YC, Chen HC, Ding WH. Simplified Derivatization Method for Triclosan Determination in Personal Care Products by Gas Chromatography-Mass Spectrometry. J CHIN CHEM SOC-TAIP 2011. [DOI: 10.1002/jccs.201190057] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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41
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Ding WH, Liu YH. Genistein attenuates genioglossus muscle fatigue under chronic intermittent hypoxia by down-regulation of oxidative stress level and up-regulation of antioxidant enzyme activity through ERK1/2 signaling pathway. Oral Dis 2011; 17:677-84. [DOI: 10.1111/j.1601-0825.2011.01822.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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42
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Tsao YC, Wang YC, Wu SF, Ding WH. Microwave-assisted headspace solid-phase microextraction for the rapid determination of organophosphate esters in aqueous samples by gas chromatography-mass spectrometry. Talanta 2011; 84:406-10. [PMID: 21376965 DOI: 10.1016/j.talanta.2011.01.055] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2010] [Revised: 01/06/2011] [Accepted: 01/16/2011] [Indexed: 11/18/2022]
Abstract
The rapid and solvent-free determination of organophosphate esters (OPEs) in aqueous samples via one-step microwave-assisted headspace solid-phase microextraction (MA-HS-SPME) followed by gas chromatography-mass spectrometry (GC-MS) analysis is described. Tri-n-butyl phosphate (TnBP) and tris-(2-ethylhexyl) phosphate (TEHP) were selected as model compounds for the method of development and validation. The effects of various extraction parameters for the quantitative extraction of these analytes by MA-HS-SPME were systematically investigated and optimized. The analytes, in a 20 mL water sample (in a 40 mL sample bottle containing 2g of NaCl, pH 3.0), were efficiently extracted by a polydimethylsiloxane-divinylbenzene (PDMS-DVB) fiber placed in the headspace when the system was microwave irradiated at 140 W for 5 min. The limits of quantification (LOQs) for TnBP and TEHP were 0.5 and 4 ng/L, respectively. Using the standard addition method, MA-HS-SPME coupled with GC-MS was utilized to determine selected OPEs in surface water and wastewater treatment plants (WWTP) influent/effluent samples. Preliminary results show that TnBP was commonly detected OPEs in these aqueous samples, the correlation coefficients (r(2)) of the standard addition curves were greater than 0.9822, indicating that the developed method appears to be a good alternative technique for analyzing OPEs in aqueous samples.
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Affiliation(s)
- Yu-Chi Tsao
- Department of Chemistry, National Central University, Chung-Li 320, Taiwan
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43
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Tzing SH, Ding WH. Determination of melamine and cyanuric acid in powdered milk using injection-port derivatization and gas chromatography–tandem mass spectrometry with furan chemical ionization. J Chromatogr A 2010; 1217:6267-73. [DOI: 10.1016/j.chroma.2010.07.081] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2010] [Revised: 07/29/2010] [Accepted: 07/30/2010] [Indexed: 10/19/2022]
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44
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Chen GW, Ding WH, Ku HY, Chao HR, Chen HY, Huang MC, Wang SL. Alkylphenols in human milk and their relations to dietary habits in central Taiwan. Food Chem Toxicol 2010; 48:1939-44. [DOI: 10.1016/j.fct.2010.04.038] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2009] [Revised: 04/02/2010] [Accepted: 04/27/2010] [Indexed: 10/19/2022]
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45
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Wu SF, Ding WH. Fast determination of synthetic polycyclic musks in sewage sludge and sediments by microwave-assisted headspace solid-phase microextraction and gas chromatography–mass spectrometry. J Chromatogr A 2010; 1217:2776-81. [DOI: 10.1016/j.chroma.2010.02.067] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2009] [Revised: 02/22/2010] [Accepted: 02/23/2010] [Indexed: 11/16/2022]
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46
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Hsu CL, Ding WH. Determination of low-molecular-weight dicarboxylic acids in atmospheric aerosols by injection-port derivatization and gas chromatography–mass spectrometry. Talanta 2009; 80:1025-8. [DOI: 10.1016/j.talanta.2009.07.047] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2009] [Revised: 07/22/2009] [Accepted: 07/22/2009] [Indexed: 11/28/2022]
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47
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Wang YC, Ding WH. Determination of synthetic polycyclic musks in water by microwave-assisted headspace solid-phase microextraction and gas chromatography-mass spectrometry. J Chromatogr A 2009; 1216:6858-63. [DOI: 10.1016/j.chroma.2009.08.028] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2009] [Revised: 07/29/2009] [Accepted: 08/10/2009] [Indexed: 10/20/2022]
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48
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Chung HW, Ding WH. Determination of organophosphate flame retardants in sediments by microwave-assisted extraction and gas chromatography–mass spectrometry with electron impact and chemical ionization. Anal Bioanal Chem 2009; 395:2325-34. [DOI: 10.1007/s00216-009-3139-4] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2009] [Revised: 09/04/2009] [Accepted: 09/07/2009] [Indexed: 11/25/2022]
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49
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Chen SJ, Chen NT, Wang SH, Hsu JC, Ding WH, Kuo-Huang LL, Huang RN. Insecticidal action of mammalian galectin-1 against diamondback moth (Plutella xylostella). Pest Manag Sci 2009; 65:923-930. [PMID: 19437454 DOI: 10.1002/ps.1775] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
BACKGROUND Previous studies showed that mammalian galectin-1 (GAL1) could interact with chitosan or chitin, one component of the peritrophic membrane (PM). This finding suggests that the PM could be a target of GAL1, which prompted the authors to explore the effect of GAL1 on larval growth and its potential mechanism. RESULTS The development of Plutella xylostella (L.) larvae was significantly disturbed after they were fed recombinant GAL1. The histochemical structure and immunostaining pattern suggested that GAL1 treatment resulted in dose- and time-dependent disruption of the microvilli and abnormalities in these epithelial cells. Ultrastructural studies showed that the PM was not present in the midgut of GAL1-treated insects; instead, numerous bacteria were found in the lumen area. These results indicate that the protective function of the PM was disrupted by GAL1 treatment. Moreover, in vitro data showed that GAL1 interacts with chitosan/chitin in a dose-dependent manner, and also specifically binds to the PM in vitro. CONCLUSION In view of the fact that the carbohydrate recognition domain of GAL1 recognises the structural motif N-acetyl lactosamine (Gal beta 1-4 GlcNAc), which is similar to that of chitin (beta-1,4 N-acetyl-D-glucosamine), it is proposed that the insecticidal mechanism of GAL1 involves direct binding with chitin to interfere with the structure of the PM.
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Affiliation(s)
- Shiang Jiuun Chen
- Department of Life Science, Institute of Ecology and Evolutionary Biology and TechComm-5, College of Life Science, National Taiwan University, Taipei 106, Taiwan
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50
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Chen HC, Chen WT, Ding WH. Determination of perchlorate in river by ion-pair hollow-fiber liquid-phase microextraction coupled with electrospray ionization tandem mass spectrometry. Talanta 2009; 79:442-5. [DOI: 10.1016/j.talanta.2009.04.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2009] [Revised: 04/02/2009] [Accepted: 04/02/2009] [Indexed: 10/20/2022]
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