Showing 721 - 740 results of 8,228 for search 'Linear sampling', query time: 0.13s Refine Results
  1. 721
  2. 722

    Optimization and Validation of a QuEChERS-Based Method Combined with Gas Chromatography–Tandem Mass Spectrometry for Analyzing Pesticide Residues in Edible Insect Samples by Phannika Tongchai, Nootchakarn Sawarng, Anurak Wongta, Udomsap Jaitham, Kunrunya Sutan, Saweang Kawichai, Chuleui Jung, Bajaree Chuttong, Surat Hongsibsong

    Published 2025-05-01
    “…This study aimed to assess and enhance a QuEChERS-based extraction method coupled with gas chromatography–tandem mass spectrometry (GC-MS/MS) for the quantification of pesticide residues in edible insects (bamboo caterpillars, house crickets, silkworm pupae, giant water bugs, and grasshoppers) by combining multiple individual insect specimens into a single, homogenized sample—five replicates were tested. The method was optimized by evaluating various extraction parameters and showed strong linearity for all 47 target pesticides, with correlation coefficients (R<sup>2</sup>) ranging from 0.9940 to 0.9999. …”
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  3. 723

    Re‐evaluating fetal scalp pH thresholds: An examination of fetal pH variations during labor by Aude Girault, Camille Le Ray, Charles Garabedian, François Goffinet, Xavier Tannier

    Published 2024-03-01
    “…Abstract Introduction Since the 1970s, fetal scalp blood sampling (FSBS) has been used as a second‐line test of the acid–base status of the fetus to evaluate fetal well‐being during labor. …”
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  4. 724

    Multiple linear regression approach for the vitrinite reflectance estimation from well logs: A case study in Sargelu and Naokelekan Formations – Shaikhan-2 Well, Shaikhan oil field... by Hussein S. Hussein, Rzger A. Abdula

    Published 2018-12-01
    “…Keywords: Shaikhan-2, Sonic log, Resistivity log, Vitrinite reflectance, Multiple linear regression, Sargelu Formation, Naokelekan Formation…”
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    Article
  5. 725

    Modelling temporal change in inventory attributes from a LiDAR-derived inventory for the United Counties of Prescott and Russell, Ontario: A comparison of random forest and linear... by Benjamin Gwilliam

    Published 2022-11-01
    “…Rather, the quadratic equations from the linear regression models were used to predict 2021 landscape values. …”
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  6. 726
  7. 727

    Wastewater SARS-CoV-2 monitoring in a university hospital forecasts multilevel epidemic curves in Taipei City, Taiwan by Chung-Yen Chen, Yu-Hsiang Chang, Chi-Hsin Sally Chen, Sui-Yuan Chang, Chang-Chuan Chan, Pau-Chung Chen, Ta-Chen Su

    Published 2025-07-01
    “…During April and October 2022, we conducted routine wastewater sampling at seven sampling wells across the campus twice weekly. …”
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  8. 728
  9. 729

    With Solvent Extraction Method, and via new Organic Reagent 2-(Benzo thiazolyl azo)-4,5- Diphenyl Imidazole for Spectrophotometric Determination of Copper (II) in different Samples by Baghdad Science Journal

    Published 2014-03-01
    “…Organic solvent effect appears there is no any linear relation between dielectric constant for organic solvent used and distribution ration (D). …”
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  10. 730

    Empirical Analysis of the Factors that Affecting Maize Production of Farmers among Smallholders: The Case of Eastern Oromia, Ethiopia by Murad Mohammed

    Published 2021-01-01
    “…Multiple linear regression models were used to analysis factors that affect maize production among smallholder farmers. …”
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    Article
  11. 731

    A Comprehensive Study of P-g-C<sub>3</sub>N<sub>4</sub>/MOF-199 Composite for Electrochemical Sensing of Metformin in Pharmaceutical Samples by Sara Dehdashtian, Shengnian Wang, Teresa A. Murray

    Published 2025-03-01
    “…A limit of detection (LOD) of 0.15 nM was achieved in the linear sensing range of 0.5 to 1200 nM for metformin. …”
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  12. 732

    Novel plant extract-chitosan nanocomposite (SCE/ChNPs) biosensor for trace level arsenic sensing in water samples using quartz crystal microbalance with dissipation monitoring by Miad Ali Siddiq

    Published 2025-01-01
    “…Validation in spiked tap water samples yielded results comparable to ICP spectroscopy, confirming the sensor’s applicability in complex matrices. …”
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  13. 733

    Development and validation of an LC-MS/MS method for highly concentrated tacrolimus and cyclosporine samples prepared from pharmaceutical products to assess drug loss from feeding... by Yi Xiao, Mari Ishak Gabra, Edward Leung

    Published 2024-11-01
    “…Results: The method was linear between 6.8 µg/mL and 75 µg/mL for tacrolimus, and between 0.9 mg/mL and 10 mg/mL for cyclosporine, with r2 > 0.99 and total precision <5 % at all QC levels. …”
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  14. 734

    A dual sensing probe for Cd2+ and Zn2+ detection in water based on tautomerization of acetamidoquinoline containing dipicolylamine and its application in water samples and cell ima... by Waroton Paisuwan, Takuya Kodama, Tanapat Palaga, Thitiporn Pattarakankul, Mongkol Sukwattanasinitt, Nantanat Chailanggar, Mamoru Tobisu, Anawat Ajavakom

    Published 2025-01-01
    “…From the results of fluorescence titration, the LOD values for Cd2+ and Zn2+ were calculated to be 17 and 8.5 ppb, respectively, with a good linear range. Furthermore, the 2QAD probe can be employed to determine the amount of Cd2+ and Zn2+ in real water samples and can also be applied to macrophage cell RAW264.7.…”
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  15. 735

    Cutaneous volatile and semi-volatile organic compounds as markers of malaria-infection by wearable samplers and two-dimensional gas chromatography—time-of-flight-mass spectrometry... by Daniel T. Pretorius, Egmont R. Rohwer, Yvette Naudé

    Published 2025-11-01
    “…A targeted analysis was performed for compounds previously reported to be associated with Plasmodium infection, viz., heptanal, (E)-2-octenal, 2-octanone, octanal, nonanal and (E)-2-decenal. The linearity (R2) range was 0.93–0.99 for a matrix matched (simulated cutaneous sampling) calibration range of 2.5–60 ng. …”
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  16. 736

    Prediction of Soil Carbon Sequestration in Rangelands Regarding the Depth and Elevation of Sample Locations using Adaptive Neuro-Fuzzy Inference System (ANFIS) (Case Study: Lar Wat... by zeinab jafarian, zhila ghorbani

    Published 2024-10-01
    “…This is despite the fact that the performance and accuracy of regression methods strongly depend on the sample size, and a small sample size can be a limiting factor in such statistical models. …”
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  17. 737

    Temperature and salinity distribution of sea ice cover according to experimental and model data (case study of Novik Bay of the Sea of Japan) by A. N. Chetyrbotsky, A. U. Lazaryuk

    Published 2018-12-01
    “…It is shown that the numerical simulation of the spatiotemporal salinity dynamics can be performed in framework of the diffusion mechanism of the vertical distribution, where the diffusion coefcient is a linear function of temperature. Te results of the parameter estimations did also show the adequacy of both the sample and the model distributions.…”
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  18. 738
  19. 739

    Effectiveness of Differentiating Mold Levels in Soybeans with Electronic Nose Detection Technology by Xuejian Song, Lili Qian, Dongjie Zhang, Xinhui Wang, Lixue Fu, Mingming Chen

    Published 2024-12-01
    “…Principal component analysis (PCA) and linear discriminant analysis (LDA) were used to evaluate inoculated and naturally moldy samples. …”
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  20. 740

    Efficient applications of green synthesized CeO2/Bi2O3 nanocomposite for simultaneous electrochemical determination of Pb (II) and Cd (II) in real samples by Hadi Mahmoudi-Moghaddam, Sahar Zinatloo-Ajabshir, Saeid Ahmadzadeh, Ali Azari

    Published 2025-08-01
    “…The Bi2O3/CeO2/SPE was effectively utilized to detect cadmium and lead ions in water and food samples, demonstrating high recovery values across different spiked samples, and the outcomes closely matched those obtained through standard ICP analysis.…”
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