Showing 221 - 240 results of 487 for search '"Ionization"', query time: 0.05s Refine Results
  1. 221

    Simultaneous Quantitative and Qualitative Analysis of Flavonoids from Ultraviolet-B Radiation in Leaves and Roots of Scutellaria baicalensis Georgi Using LC-UV-ESI-Q/TOF/MS by Wen-Ting Tang, Min-Feng Fang, Xiao Liu, Ming Yue

    Published 2014-01-01
    “…Liquid chromatography-ultraviolet detection coupled with electrospray ionization quadrupole time-of-flight mass spectrometry (LC-UV-ESI-Q/TOF/MS) method was applied for simultaneous quantitative and qualitative analysis of flavonoids in leaves and roots of S. baicalensis by enhanced UV-B radiation. …”
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  2. 222

    Global Empirical Model of Sporadic-E Occurrence Rates by Eli V. Parsch, Anthony L. Franz, Eugene V. Dao, Dong L. Wu, Nimalan Swarnalingam, Nimalan Swarnalingam, Cornelius C. J. H. Salinas, Daniel J. Emmons

    Published 2024-11-01
    “…Intense ionization enhancements in the Earth’s ionosphere, known as sporadic-E (Es), can degrade and severely disrupt the propagation of radio signals. …”
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  3. 223

    Determination of Trans-Fatty Acid Levels in Selected Syrian Food Products by Radwan Badr Al-Deen, Bassam Al-Oklah, Mohamad Alshehabi, Tahani Al-idee

    Published 2025-01-01
    “…The Soxhlet method was used to extract the lipids from the samples (except oils), then the methyl esters of fatty acids (FAME) were prepared and the concentration of fatty acids (g/100g) was determined using gas chromatography (GC) equipped with a Split/Splitless injector and a flame ionization detector (FID). The results revealed that the levels of Trans fatty acids (TFAs) ranged in all samples from 0.04 to 1.82 g/100g, with high amounts (4.78%) found in one sample of cow’s ghee, two samples of palm oil, and one sample of soybean oil. …”
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  4. 224

    Ionospheric Response to the Extreme 2024 Mother's Day Geomagnetic Storm Over the Latin American Sector by C. S. Carmo, L. Dai, C. M. Wrasse, D. Barros, H. Takahashi, C. A. O. B. Figueiredo, C. Wang, H. Li, Z. Liu

    Published 2024-12-01
    “…The geomagnetic storm caused a super fountain effect, propelling plasma from the equator to a distance of ∼35° latitude, and depositing high‐density plasma on the crest of the equatorial ionization anomaly (EIA).…”
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  5. 225

    High Throughput Quantitative Bioanalytical LC/MS/MS Determination of Gemifloxacin in Human Urine by Adnan A. Kadi, Rihab F. Angawi, Mohamed W. Attwa, Hany W. Darwish, Ali Saber Abdelhameed

    Published 2013-01-01
    “…The analytes were monitored by electrospray ionization in positive ion multiple reaction monitoring mode. …”
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  6. 226

    Prevalence and methodologies for detection, characterization and subtyping of Listeria monocytogenes and L. ivanovii in foods and environmental sources by Jin-Qiang Chen, Patrick Regan, Pongpan Laksanalamai, Stephanie Healey, Zonglin Hu

    Published 2017-09-01
    “…In this review, we (A) described L. monocytogenes and L. ivanovii, world-wide incidence of listeriosis, and prevalence of various L. monocytogenes strains in food and environmental sources; (B) comprehensively reviewed different types of traditional and newly developed methodologies, including culture-based, antigen/antibody-based, LOOP-mediated isothermal amplification, matrix-assisted laser desorption ionization-time of flight-mass spectrometry, DNA microarray, and genomic sequencing for detection and characterization of L. monocytogenes in foods and environmental sources; (C) comprehensively summarized different subtyping methodologies, including pulsed-field gel electrophoresis, multi-locus sequence typing, ribotyping, and phage-typing, and whole genomic sequencing etc. for subtyping of L. monocytogenes strains from food and environmental sources; and (D) described the applications of these methodologies in detection and subtyping of L. monocytogenes in foods and food processing facilities.…”
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  7. 227

    Insights into the Properties of Type Ibn/Icn Supernovae and Their Progenitor Channels through X-Ray Emission by Yusuke Inoue, Keiichi Maeda

    Published 2025-01-01
    “…In addition, considering the evolution of the ionization state in the unshocked CSM, a bright soft X-ray is expected in the first few days since the explosion, which encourages rapid X-ray follow-up observations as a tool to study the nature of SNe Ibn/Icn. …”
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  8. 228

    Validation of the α-μ Model of the Power Spectral Density of GPS Ionospheric Amplitude Scintillation by Kelias Oliveira, Alison de Oliveira Moraes, Emanoel Costa, Marcio Tadeu de Assis Honorato Muella, Eurico Rodrigues de Paula, Waldecir Perrella

    Published 2014-01-01
    “…The formulation based on the α-μ model is developed and validated using experimental data obtained in São José dos Campos (23.1°S; 45.8°W; dip latitude 17.3°S), Brazil, located near the southern crest of the ionospheric equatorial ionization anomaly. These data were collected between December 2001 and January 2002, a period of high solar flux conditions. …”
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  9. 229

    Identifying the Geographical Origin of Tobacco Leaf by Strontium and Lead Isotopic with Mineral Elemental Fingerprint by Liu Hong, Wenyuan Wang, Yang Su, Guiping Zhang, Yong Su, Chenming Zhang, Jianhua Chen, Wei Zhe, Zhihua Liu, Jianyong Cui, Deshou Mao, Jin Wang

    Published 2022-01-01
    “…And nine mineral element contents and four strontium and lead isotope ratios of the tobacco leaves were determined by thermal ionization mass spectrometry (TIMS) and inductively coupled plasma mass spectrometry (ICP-MS). …”
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  10. 230

    Characterization of Anthocyanins Including Acetylated Glycosides from Highbush Blueberry (<i>Vaccinium corymbosum</i> L.) Cultivated in Korea Based on UPLC-DAD-QToF/MS and UPLC-Qtr... by Ju Hyung Kim, Ryeong Ha Kwon, So Ah Kim, Hyemin Na, Jeong-Yong Cho, Heon-Woong Kim

    Published 2025-01-01
    “…Among them, seven acetylated glycosides were tentatively determined by comparing the related authentic standards and previous reports and presented mass fragmentation, in which the acetyl group remained as the form attached to the sugar without de-esterification in positive ionization mode. The mid-season cultivar ‘New Hanover’ showed the highest total anthocyanin content (1011.7 mg/100 g dry weight) with predominant malvidin and delphinidin glycosides. …”
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  11. 231

    Mechanically stable polymer networks incorporating polymeric ionic liquids for enhanced conductivity in solid-state electrolytes by Sezer Özenler, Nataliya Kiriy, Upenyu L. Muza, Martin Geisler, Anton Kiriy, Brigitte Voit

    Published 2025-12-01
    “…Molecular weights of the PIL samples, ranging from 30 to 40 kDa, were determined using a complimentary combination of thermal field-flow fractionation (ThFFF) and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) analysis. …”
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  12. 232

    Toxicological landscape of Fuzi: a comprehensive study on the spatial distribution of toxicants and regional neurotoxicity variability in zebrafish by Xiaoqi Pan, Xiaoqi Pan, Tianyu Liang, Han Feng, Weiying Liu, Qiaoxin Mou, Xiaoyu Yan

    Published 2025-02-01
    “…Matrix-assisted laser desorption/Ionization mass spectrometry imaging (MALDI-MSI) method was employed to map the spatial distribution of six key diester-type alkaloids from Fuzi samples originating from five major regions. …”
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  13. 233

    Serum hydroxycotinine was associated with chronic kidney disease (CKD): a cross-sectional study based on NHANES by Meng’en Zhu, Zhimin Bi, Yaoling Wang, Wei Li

    Published 2024-12-01
    “…Serum hydroxycotinine was measured by an isotope-dilution high-performance liquid chromatography/atmospheric pressure chemical ionization tandem mass spectrometric (ID HPLC-APCI MS/MS) method with a lower limit of detections (LLOD) at 0.015 ng/mL. …”
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  14. 234

    Lysine Reacts with Cholesterol Hydroperoxide to Form Secosterol Aldehydes and Lysine-Secosterol Aldehyde Adducts by George Wafula Wanjala, Arnold Nola Onyango, David Rasugu Abuga, John Kamathi Muchuna, Calvin Onyango, Moses Makayoto

    Published 2020-01-01
    “…Here, we subjected cholesterol to photosensitized oxidation, which predominantly produces Ch-5α-OOH and minor amounts of the 6α- and 6β-hydroperoxides, exposed the hydroperoxide mixture to lysine in the presence of the antioxidant 2,6-ditertiary-butyl-4-hydroxytoluene (BHT), and analysed the reaction mixture by liquid chromatography-electrospray ionization-mass spectrometry. Consistent with the postulated lysine-catalysed formation of secosterol aldehydes, we detected formation of the latter and several types of their lysine adducts, including carbinolamines, Schiff’s bases, and amide-type adducts. …”
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  15. 235

    The Measurement of Neutron Contamination in High Energy X-Ray Radiotherapy Using a He-3 Gas Dosimeter by Alireza Vejdani, Mehdi Momennezhad, Sara Mohammadi, Vajiheh Vejdani Noghreiyan, Atefeh Rostami

    Published 2024-10-01
    “…We used two types of dosimeters: a He-3 gas dosimeter (CRAMAL 31) as a neutron dosimeter and Farmer ionization chambers, and PC-electrometer (Sun Nuclear, USA) which is sensitive to photons measured photo-neutron doses. …”
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  16. 236
  17. 237

    Apolipoprotein C-I Levels Are Associated with the Urinary Protein/Urinary Creatinine Ratio in Pediatric Idiopathic Steroid-Sensitive Nephrotic Syndrome: A Case Control Study by Jun Odaka, Takahiro Kanai, Takane Ito, Takashi Saito, Jun Aoyagi, Hiroyuki Betsui, Takanori Yamagata

    Published 2017-01-01
    “…We used surface-enhanced laser desorption/ionization time of flight MS for sample analysis. Four ion peaks with a mass-to-charge ratio (m/z) of 6,444, 6,626, 8,695, and 8,915 were significantly elevated during ISSNS Phase A1 compared to Phase A2, Phase A3, and Group C. …”
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  18. 238

    Comparative efficacy of plant derived extracts with the insecticide mospilan on two whitefly species Bemisia tabaci biotype B and Trialeurodes ricini by Hanaa S. Hussein, Mamdouh H. Idriss, Farouk H. El-Gayar, Hebatullah Yehia Saad Mousa, Mohamed Z. M. Salem

    Published 2025-01-01
    “…The chemical compositions of HEs were identified using gas chromatography-mass spectrometry (GC-MS) and gas chromatography with flame-ionization detection (GC-FID) analysis. The main compounds of thyme HE were thymol and geranyl-α-terpinene; in garlic bulbs HE were diallyl sulfide and allyl tetrasulfide; and in weeping willow HE were 6-phenyltridecane, 6-phenyldodecane, and 5-phenyldodecane, while the methylated fatty acids were stearic and palmitic. …”
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  19. 239

    Analysis of the Internal Radial Gradient of Chemical Abundances in Spiral Galaxies from CALIFA by A. F. S. Cardoso, O. Cavichia, M. Mollá, L. Sánchez-Menguiano

    Published 2025-01-01
    “…Additionally, we analyze the abundance radial gradients to investigate the impact of diffuse ionized gas (DIG) decontamination on oxygen abundances over these inner drops. …”
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  20. 240

    Chemical Composition, Antioxidant Activity, and Antifungal Effects of Essential Oil from Laurus nobilis L. Flowers Growing in Morocco by Ibrahim Mssillou, Abdelkrim Agour, Asmae El Ghouizi, Noureddine Hamamouch, Badiaa Lyoussi, Elhoussine Derwich

    Published 2020-01-01
    “…The chemical composition of the obtained essential oil and chemotypes was determined using gas chromatography coupled with mass spectrometry (GC/MS) and gas chromatography with flame ionization detection (GC-FID). Twenty-five volatile compounds were identified, which made up 92.07% of the total essential oil content. …”
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