Showing 841 - 860 results of 1,810 for search '"Mass spectrometry"', query time: 0.08s Refine Results
  1. 841

    Rapid detection of drug abuse via tear analysis using surface enhanced Raman spectroscopy and machine learning by Yingbin Wang, Yulong Huang, Xiaobao Liu, Chishan Kang, Wenjie Wu

    Published 2025-01-01
    “…Using ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS), the average concentration of EPH in tear fluid of Sprague-Dawley (SD) rats, measured over 3 h post-injection, was 1235 ng/mL. …”
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  2. 842

    Formation Patterns of Major Flavor Substances Based on the Analysis of Spatiotemporal Heterogeneity in the Traditional Solid-State Fermentation System of Shanxi Aged Vinegar by SHEN Jin, ZHOU Jingli, LANG Fanfan, YAN Yufeng, WANG Li, XIA Yaoyao, LI Jie, ZHANG Feng, WANG Chenyuan, ZHENG Yu

    Published 2025-01-01
    “…Samples of fermented grains (Cupei) taken at different spatial locations and at different fermentation times were analyzed for physicochemical characteristics, flavor substances and microbial community composition by metagenomics and headspace-solid phase microextraction-gas chromatography-mass spectrometry (HS-SPME-GC-MS). The results showed that the moisture and temperature of Cupei significantly varied among spatial locations. …”
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  3. 843

    TYPOCHEMISTRY OF MAGNETITE FROM MASSIVE SULFIDE AND IRON DEPOSITS OF THE URALS ACCORDING TO LA-ISP-MS DATA by V.V. Maslennikov, N.R. Ayupova, A.S. Tseluyko, N.P. Safina, D.A. Artemyev, U.A. Yatimov, S.I. Bryukhov, P.V. Khvorov, M.A. Rassomakhin

    Published 2025-12-01
    “…It is established using laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS) that, in contrast to magnetite of iron deposits, magnetite of ore-controlling volcanosedimentary horizons of the Urals massive sulfide deposits is characterized by a higher content and stable associations of Bi, Te, Co, As, Cd, Zn, Cu and Mo due to relict inclusions of sulfide clasts and products of their halmyrolysis. …”
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  4. 844

    Targeted lipidomics analysis of possible molecular mechanisms of lipid changes in temporal lobe epilepsy models by Huaiyu Sun, Xuewei Li, Zhiqing Chen, Hongmei Meng

    Published 2025-01-01
    “…The lipids were quantitatively and qualitatively analyzed by ultra-high performance liquid chromatography (UPLC) and mass spectrometry (MS).ResultsA total of 21 lipid classes were identified. …”
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  5. 845

    How to Efficiently Produce Ultrapure Acids by Damiano Monticelli, Alessio Castelletti, Davide Civati, Sandro Recchia, Carlo Dossi

    Published 2019-01-01
    “…The concentration of twenty elements in the purified acids was determined by Inductively Coupled Plasma-Mass Spectrometry. As a result, the subboiling temperature (up to 82°C) and the number of subsequent distillations (up to four) were demonstrated not to affect the purity of the distilled nitric and hydrochloric acids. …”
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  6. 846

    Exogenous Angiotensin I Metabolism in Aorta Isolated from Streptozotocin Treated Diabetic Rats by P. P. Wołkow, B. Bujak-Giżycka, J. Jawień, R. Olszanecki, J. Madej, J. Rutowski, R. Korbut

    Published 2016-01-01
    “…Products of ANG I metabolism through classical (ANG II, ANG III, and ANG IV) and alternative (ANG (1–9), ANG (1–7), and ANG (1–5)) pathways were measured in the buffer, using liquid chromatography-mass spectrometry. Results. Incubation with ANG I resulted in higher concentration of ANG II (P = 0.02, vehicle pretreatment) and lower of ANG (1–9) (P=0.048, perindoprilat pretreatment) in diabetes. …”
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  7. 847

    Synthesis and In Vitro Biological Evaluation of Aminonaphthoquinones and Benzo[b]phenazine-6,11-dione Derivatives as Potential Antibacterial and Antifungal Compounds by Amaç Fatih Tuyun, Nilüfer Bayrak, Hatice Yıldırım, Nihal Onul, Emel Mataraci Kara, Berna Ozbek Celik

    Published 2015-01-01
    “…The structures of the new members of the series were established on the basis of their spectral properties (IR, 1H NMR, 13C NMR, and mass spectrometry).…”
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  8. 848

    Biosynthesis of silver nanoparticles from macroalgae Hormophysa triquetra and investigation of its antibacterial activity and mechanism against pathogenic bacteria by Shazia Bibi, Mohammed H. Abu-Dieyeh, Mohammad A. Al-Ghouti

    Published 2025-01-01
    “…The NPs are characterized using Transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Gas chromatography/Mass spectrometry (GC/MS) and X-ray photoelectron spectroscopy (XPS). …”
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  9. 849

    Metabolome profiling dissects the oat (Avena sativa L.) innate immune response to Pseudomonas syringae pathovars. by Chanel J Pretorius, Paul A Steenkamp, Ian A Dubery

    Published 2025-01-01
    “…Methanolic leaf extracts were analysed by ultra-high-performance liquid chromatography (UHPLC) connected to high-definition mass spectrometry. Chemometric modelling and multivariate statistical analysis indicated time-related metabolic reconfigurations that point to host and nonhost interactions in response to bacterial inoculation/infection. …”
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  10. 850

    Electrochemically reduced graphene oxide integrated with carboxylated-8-carboxamidoquinoline: A platform for highly sensitive voltammetric detection of Zn(II) ion by screen-printed... by Ling Ling Tan, Nur Syamimi Mohamad, Nurul Izzaty Hassan, Choo Ta Goh

    Published 2025-01-01
    “…The developed electrode was applied to determine Zn(II) ion concentration in dietary supplement samples, and the results were in good agreement with those obtained from inductively coupled plasma-mass spectrometry (ICP-MS).…”
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  11. 851

    Antihuman Immunodeficiency Virus Type 1 (HIV-1) Activity of Rare Earth Metal Complexes of 4-Hydroxycoumarins in Cell Culture

    Published 2006-01-01
    “…The complexes were characterized by different physicochemical methods: mass spectrometry, ¹H NMR, ¹³C NMR, and IR spectroscopy. …”
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  12. 852

    Optimization of Extraction Conditions for Determination of Tiliroside in Tilia L. Flowers Using an LC-ESI-MS/MS Method by Aleksandra Pieczykolan, Wioleta Pietrzak, Renata Nowak, Józefina Pielczyk, Karolina Łamacz

    Published 2019-01-01
    “…A new, rapid, simple, sensitive, and selective liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS) method was developed to determine the content of tiliroside in Tilia L. flowers. …”
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    Article
  13. 853

    Heavy metals concentrations in commercial organic fertilizers and the potential risk of fertilization into soils by Kunjie Su, Qingliang Zhang, Anjing Chen, Xiaoqin Wang, Lingling Zhan, Qiang Rao, Jinxia Wang, Hongjun Yang

    Published 2025-01-01
    “…Abstract Inductively coupled plasma mass spectrometry (ICP-MS) was used to detect heavy metals in 74 typical and representative commercial organic fertilizers (COFs) collected in major COF production areas in China. …”
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    Article
  14. 854

    Inflammatory Markers Are Positively Associated with Serum trans-Fatty Acids in an Adult American Population by Mohsen Mazidi, Hong-kai Gao, Andre Pascal Kengne

    Published 2017-01-01
    “…TFAs were measured via capillary gas chromatography and mass spectrometry using negative chemical ionization. Analysis of covariance and multivariable-adjusted linear regression models were used to investigate the associations between these parameters, accounting for the survey design. …”
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  15. 855

    Assessing environmental and human health risks of pharmaceutical contamination in surface water by Ioana-Antonia Cimpean, Florentina Laura Chiriac, Diana Constantinescu-Groposila, Victor Constantin Cojocaru, Vasile Ion Iancu

    Published 2024-12-01
    “…The most commonly employed techniques include solid phase extraction (SPE) followed by high-performance liquid chromatography coupled with mass spectrometry (HPLC/MS). This study supports ongoing efforts to monitor and regulate drug contamination in water sources, evaluating potential risks to human health and emphasizing the importance of addressing these contaminants to protect environmental and public health.…”
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  16. 856

    Proteomic Analysis of the Vitreous following Experimental Retinal Detachment in Rabbits by Nakul Mandal, Geoffrey P. Lewis, Steven K. Fisher, Steffen Heegaard, Jan U. Prause, Morten la Cour, Henrik Vorum, Bent Honoré

    Published 2015-01-01
    “…The vitreous samples were evaluated with two-dimensional polyacrylamide gel electrophoresis and the differentially expressed proteins were identified with tandem mass spectrometry. Results. Ten protein spots were found to be at least twofold differentially expressed when comparing the vitreous samples of the sham and retinal detachment surgery groups. …”
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  17. 857

    Diversity and sex differences in rectal gland volatiles of Queensland fruit fly, Bactrocera tryoni (Diptera: Tephritidae). by Cynthia Castro-Vargas, Gunjan Pandey, Heng Lin Yeap, Michael J Lacey, Siu Fai Lee, Soo J Park, Phillip W Taylor, John G Oakeshott

    Published 2022-01-01
    “…We used solid-phase microextraction (SPME) plus gas chromatography-mass spectrometry (GC-MS) and gas chromatography-flame ionization detection (GC-FID) to substantially expand rectal gland chemical characterisation of the Queensland fruit fly (Bactrocera tryoni (Diptera: Tephritidae); Qfly). …”
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  18. 858

    Identification and Screening of Natural Neuraminidase Inhibitors from Reduning Injection via One-Step High-Performance Liquid Chromatography-Fraction Collector and UHPLC/Q-TOF-MS by Lijun An, Xie-An Yu, Wei Liu, Jin Li, Yan-Xu Chang

    Published 2020-01-01
    “…The one-step high-performance liquid chromatography-fraction collector (HPLC-FC) was selected to prepare fractions from Reduning (RDN) injection, while ultra-high-performance liquid chromatography/quadrupole-time-of-flight mass spectrometry (UHPLC/Q-TOF-MS) was used to identify fractions depending on their retention time and molecular ion. …”
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  19. 859

    Evaluation of Plasma Amino Acid Levels in Preterm Infants and Their Potential Correlation with Retinopathy of Prematurity by Yasin Ozcan, Gumus Huseyin, Kenan Sonmez

    Published 2020-01-01
    “…Plasma aa levels were analyzed using liquid chromatography with tandem mass spectrometry (LC-MS/MS). Correlation test and multivariate regression analysis were used to evaluate the relationship between plasma aa levels and variables. …”
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  20. 860

    Streptomyces sp. strain MUSC 5 from mangrove forest in Malaysia: Identification, antioxidant potential and chemical profiling of its methanolic extract by Hefa Mangzira Kemung, Loh Teng-Hern Tan, Kok-Gan Chan, Hooi-Leng Ser, Jodi Woan-Fei Law, Bey Hing Goh

    Published 2020-05-01
    “…Furthermore, Gas chromatography Mass Spectrometry (GC-MS) was used to determine the presence of biologically active chemical compounds in methanolic extract of Streptomyces sp. strain MUSC 5. …”
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    Article