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Showing 461 - 480 results of 15,724 for search 'determined (coefficiency OR efficient) methods', query time: 0.26s Refine Results
  1. 461
  2. 462

    Determination of morphine, codeine and 6-monoacetylmorphine in saliva of substance-abuse patients using HPLC/MS methods by Milovanović Vesna, Ćirić Biljana, Milenković Jasna, Kilibarda Vesna, Ćurčić Marijana, Vučinić Slavica, Antonijević Biljana

    Published 2012-01-01
    “…Saliva represents an alternative specimen for substances abuse determination in toxicology. Hence, the aim of this study was to optimize a method for saliva specimen preparation for heroin metabolites, morphine and 6-monoacetylmorphine (6-mam), and codeine determination by liquid chromatography-mass spectrometry (LC/MS), and to apply this method on saliva samples taken from the patients. …”
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    Article
  3. 463

    Development and psychometric evaluation of the child marriage cognitive determinants questionnaire (CMCDQ): a mixed-methods study by Bahman Baraie, Haidar Nadrian, Mehdi Rezaei, Abdolrasoul Safaiyan, Hossein Matlabi

    Published 2025-08-01
    “…This study aimed to develop and evaluate the Child Marriage Cognitive Determinants Questionnaire (CMCDQ). An exploratory sequential mixed methods research design was conducted from 2021 to 2022 in Sanandaj, Iran. …”
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    Article
  4. 464

    Decision Support System for Determining Disease and Pest Handling in Chili Plants Using WP and VIKOR Methods by Muhammad Mulkan Jalila, Wahyu Fuadi, Ar Razi

    Published 2025-07-01
    “…Many farmers have difficulty in determining the right handling strategy, so technology-based solutions are needed to assist the decision-making process. …”
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  5. 465

    Advances in quality control through the development of a more sustainable and eco-friendly direct spectrophotometric method than pharmacopoeial methods for the determination of bis... by Safwan Ashour

    Published 2025-07-01
    “…The results indicated that the proposed method is highly efficient in determining the amount of BF in the tablets, which helps improve quality control and environmental improvement. …”
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  6. 466
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  8. 468

    Simultaneous Determination of Multiple Acid-Suppressing Drugs by UPLC-MS/MS Method and Application for Pharmacokinetics Study by Li X, Liu S, Yu M, Xi W, Wu X, Liu D, Liu A, Wang H

    Published 2025-02-01
    “…Precisely quantifying their plasma levels is crucial for clinical pharmacokinetic assessments and therapeutic drug monitoring.Aim: This study aimed to establish a generic and efficient ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) assay for the determination of five PPIs (esomeprazole, rabeprazole, ilaprazole, lansoprazole, and pantoprazole) and the P-CAB (vonoprazan) in human plasma.Methods: The six analytes were extracted from human plasma via protein precipitation and a single dilution step. …”
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  9. 469

    ALTERNATIVE METHOD FOR DETERMINING METAL UPTAKE FROM WATER BY ESCHERICHIA COLI K12 CD3 by N. M. T. Jebril, A. K. Murad, R. A. Majeed, A. H. Al-Sabary, I. A. Abed, B. H. Hashim

    Published 2025-06-01
    “…By comparison, usual TEM-EDX analyzes show that the concentration was not qualitatively determined. At the same time, the ICP-M device was not as efficient in measuring cadmium concentrations. …”
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  10. 470
  11. 471

    Integrated Approach to Aerodynamic Optimization of Darrieus Wind Turbine Based on the Taguchi Method and Computational Fluid Dynamics (CFD) by Nurdaulet Kalassov, Zhandos Baizhuma, Rustem Manatbayev, Ainakul Yershina, Muhtar Isataev, Aiida Kalassova, Zhanibek Seidulla, Birzhan Bektibay, Bakyt Amir

    Published 2025-05-01
    “…The Taguchi method using an orthogonal array was used as an optimization method, which reduced the number of necessary calculations from 77 to 20 while maintaining the reliability of the analysis. …”
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    Article
  12. 472

    Efficient Neural Network Control of a Brushless DC Motor by A. A. Vеlchеnko, S. A. Pauliukavеts, A. A. Radkеvich, A. K. Ibrahim

    Published 2025-02-01
    “…A proactive calculation of the neural network was carried out, and the rules for adjusting the weighting coefficients were determined. Based on proactive calculation, a PID controller with self-adjusting parameters using a neural network was built, as well as a block diagram of the PID control system was built on the basis of the BP neural network; also, a speed controller was built using MATLAB modules. …”
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  13. 473
  14. 474

    Analytical approach for simultaneous determination of azoxystrobin, prothioconazole and trifloxystrobin in plant protection products by Lazić Sanja, Šušnjar Aleksandra, Vuković Slavica, Ećimović Jelena, Đukanović Mitar, Šunjka Dragana

    Published 2025-01-01
    “…In this study, an isocratic reversed-phase high-performance liquid chromatographic (RP-HPLC) method with diode array detection (DAD) was developed and validated for simultaneous determination of azoxystrobin, trifloxystrobin and prothioconazole in plant-protection products. …”
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  15. 475

    Determination of the Machine and Tractor Fleet Optimal Composition for a Model Cotton­Textile Cluster by M. T. Toshboltaev, M. R. Dzhiyanov

    Published 2021-06-01
    “…(Research purpose) To calculate the required amount of agricultural machinery based on the established standards. (Materials and methods) The authors developed an algorithm for determining the standard coefficients of the equipment necessity per 1000 hectares of arable land. …”
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  16. 476

    Development and validation of an HPLC-DAD analytical method for quantitative and simultaneous determination of cefoperazone and prednisolone in intramammary ointment by Patrícia Espinosa dos Santos, Jefferson Annunciatto, Teófilo Fernando Mazon Cardoso, Marcos Serrou do Amaral, Nájla Mohamad Kassab

    Published 2025-07-01
    “…The method was applied in intramammary ointments, showing linearity, for CPZ, from 0.25 to 25 μg mL-1 (r=0.9999); and, for PRED, from 0.75 to 30 μg mL-1 (r=0.9997), with low limits of detection and quantification, precision with coefficients of variation less than 2%, in accuracy, presented recovery close to 100% for both drugs, in addition to demonstrating their robustness by the Youden test, which evaluated the effects and concluded that the altered parameters in the test were not sufficient to change the values obtained in the determinations. …”
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  17. 477

    Development and Validation of a High‐Performance Liquid Chromatography Method for the Determination of Epoxyaurapten From Pomelo Peel by Hui Ni, Dongfeng Guo, Xue Li, Lijun Li, Yuanfan Yang, Xiping Du, Yang Hu, Shuyu Zhang, Feng Chen, Fan He

    Published 2025-08-01
    “…The effects of extraction solvent, liquid‐to‐material ratio, ultrasonic time, and extraction cycles on the extraction of epoxyaurapten from pomelo peel were investigated, and the optimal sample pretreatment conditions were determined to ensure the extraction efficiency. The results indicated a high degree of precision with a linear correlation coefficient of 0.9999. …”
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    Article
  18. 478

    Establishment of QuEChERS-UPLC-MS/MS method to determine three kinds of ochratoxins in coffee by GAO Yunkai, CHEN Xiaomei, CHEN Chunqian, ZHOU Lingyu, DENG Yinglin, YIN Qingchun

    Published 2023-12-01
    “…<b>Objective:</b> A new method was developed for the simultaneous determination of three kinds of ochratoxins in coffee by ultra-high performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) combined with QuEChERS pretreatment. …”
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  19. 479

    Consideration of the temperature factor of atmospheric air when determining standard consumption of fuel and energy resources for train traction by K. M. Popov

    Published 2018-12-01
    “…Specialists of JSC “VNIIZhT” carried out an analysis of a significant amount of driver’s routes data, results of which showed that the dependence of the specific flow rate on temperature, on the basis of which the corresponding influence coefficient is determined, needs to be periodically updated. …”
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  20. 480

    A Field data- based method to determine the pressure-burst relationships in urban water distribution networks by Yasaman Taj Abadi, Mohamadreza Jalili Ghazizade, Iman Moslehi

    Published 2018-03-01
    “…Therefore, the development of models to predict precisely failure based on effective factors is necessary to achieve optimal leakage management in water distribution networks. Materials and methods: In the present study, using a developed model and Pressure and burst field data analysis in urban water distribution network, the relationship between pressure and burst rate for a district of Tehran has been determined. …”
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