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Determination of morphine, codeine and 6-monoacetylmorphine in saliva of substance-abuse patients using HPLC/MS methods
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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463
Development and psychometric evaluation of the child marriage cognitive determinants questionnaire (CMCDQ): a mixed-methods study
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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464
Decision Support System for Determining Disease and Pest Handling in Chili Plants Using WP and VIKOR Methods
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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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...
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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466
Determination of Parameters of Electrode Metal Transported Drops by Simulation and Visualization
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467
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468
Simultaneous Determination of Multiple Acid-Suppressing Drugs by UPLC-MS/MS Method and Application for Pharmacokinetics Study
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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469
ALTERNATIVE METHOD FOR DETERMINING METAL UPTAKE FROM WATER BY ESCHERICHIA COLI K12 CD3
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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470
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Integrated Approach to Aerodynamic Optimization of Darrieus Wind Turbine Based on the Taguchi Method and Computational Fluid Dynamics (CFD)
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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472
Efficient Neural Network Control of a Brushless DC Motor
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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473
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Analytical approach for simultaneous determination of azoxystrobin, prothioconazole and trifloxystrobin in plant protection products
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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475
Determination of the Machine and Tractor Fleet Optimal Composition for a Model CottonTextile Cluster
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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476
Development and validation of an HPLC-DAD analytical method for quantitative and simultaneous determination of cefoperazone and prednisolone in intramammary ointment
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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477
Development and Validation of a High‐Performance Liquid Chromatography Method for the Determination of Epoxyaurapten From Pomelo Peel
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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478
Establishment of QuEChERS-UPLC-MS/MS method to determine three kinds of ochratoxins in coffee
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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479
Consideration of the temperature factor of atmospheric air when determining standard consumption of fuel and energy resources for train traction
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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480
A Field data- based method to determine the pressure-burst relationships in urban water distribution networks
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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