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1181
Simultaneous determination of 9 succinate dehydrogenase inhibitor compounds in vegetables by QuEChERS combined with gas chromatography-tandem mass spectrometry
Published 2025-04-01“…A gas chromatography-tandem mass spectrometry (GC-MS/MS) method was established for the simultaneous determination of 9 succinate dehydrogenase inhibitor (SDHIs) compounds in vegetables. …”
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1182
Investigation of Indirect Shear Strength of Black Shale for Urban Deep Excavation
Published 2024-09-01“…The effects of experimental methods and diametric loading on the elastic constant determination were evaluated and analyzed, and the indirect shear strength of the black shale, considering anisotropy, was determined using the estimated stress concentration coefficient. …”
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1183
Determination of the metabolites, eicosanoids derived from polyunsaturated fatty acids in Drosophila tissue with high performance liquid chromatography tandem mass spectrometry
Published 2016-01-01“…Therefore, this study is aimed to develop a high performance liquid chromatography tandem mass spectrometry (HPLC-MS/MS) method for the determination of eicosanoids in Drosophila.Fifteen metabolites of AA and EPA produced by human in COX, LOX and CYP pathway were chosen, and each pathway contained 1 or 2 metabolites as delegates to ensure the representative of the method. …”
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1184
Thermal expansion of (FeIn<sub>2</sub>S<sub>4</sub>)<sub>0.5</sub>×(AgIn<sub>5</sub>S<sub>8</sub>)<sub>0.5</sub> single crystals
Published 2019-06-01“…The elementary cell parameters was calculated with the least square method. The thermal expansion was measured by a dilatometric method, the coefficient of thermal expansion was determined. …”
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1185
Determination of 18 Amino Acids in Water by Solid Phase Extraction-Ultra Performance Liquid Chromatography-Tandem Triple Quadrupole Mass Spectrometry
Published 2025-03-01“…The results showed that the standard curves of this method for 18 AAs have good linearity with the correlation coefficient (R2) larger than 0.9913, the limits of detection and the limits of quantification are 0.06-0.23, 0.19-0.76 nmol/L, respectively. …”
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1186
Monetary revenues as a major indicator of the living standards of the population of Russia
Published 2019-07-01“…Along with traditional statistical methods, the study also used the method of assessing structural differences, the method of index analysis of the differentiation of the population by monetary income at both the Federal and regional levels. …”
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1187
Aging steller sea lions by growth layer groups in teeth
Published 2019-06-01“…By conducting readings 3 times, we used coefficient of variation (CV) to determine precision. …”
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1188
Solving Boundary Value Problems for a Class of Differential Equations Based on Elastic Transformation and Similar Construction Methods
Published 2025-04-01“…To address the boundary value problem associated with a class of third-order nonlinear differential equations with variable coefficients, this study integrates three key methods: the elastic transformation method (ETM), the similar construction method (SCM), and the elastic inverse transformation method (EITM). …”
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1189
BOOTSTRAPPING METHODS FOR CONSTRUCTING CONFIDENCE INTERVALS FOR THE ESTIMATION OF MODEL PARAMETERS OF THE ZONAL DISINTEGRATION OF ROCKS AROUND UNDERGROUND EXCAVATIONS
Published 2018-03-01“…Conclusion The interval estimates of the determination coefficients obtained by bootstrapping methods have a significant advantage in comparison with traditional approaches. …”
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1190
The potential energy impact of the suction tube of pumping facilities on the mark of pump axis installation and the power consumption of drive motors
Published 2025-03-01“…Purpose: to substantiate theoretically the impact of the potential energy of suction tube of pumping facilities on the installation mark of the pump axis and the drive motor power. Materials and methods. The theoretical studies were based on the substantiation of the impact of potential energy in the pump housing on head, on the analysis of dependence of hydraulic resistances coefficients in the suction tube on the installation height of the pump axis relative to the water source surface and on the impact of potential energy in the suction tube on the useful power of drive motors. …”
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1191
DIFFUSION-WEIGHTED MAGNETIC RESONANCE IMAGING IN THE DIAGNOSIS OF INTERVERTEBRAL DISC DEGENERATION IN THE LUMBOSACRAL SPINE
Published 2017-01-01“…Objective: to quantify the degree of degeneration of intervertebral discs (IVDs), by constructing functional diffusion-weighted imaging (DWI) maps, and to determine a correlation between the measured diffusion coefficient (DC) values and IVD changes on T1- and T2-weighted images. …”
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1192
Thermal expansion of (MnIn<sub>2</sub>S<sub>4</sub>)<sub>1-x</sub>•(AgIn<sub>5</sub>S<sub>8</sub>)<sub>x</sub> solid solutions
Published 2019-06-01“…The thermal expansion of single crystals of solid solutions (MnIn2S4)1–х•(AgIn5S8)х was measured by the dilatometric method in the temperature range 80–450 K. The coefficients of thermal expansion are determined and their concentration dependences at different temperatures are constructed. …”
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1193
A new method to assess lumbar vertebral body rotation on simple radiographs
Published 2024-12-01“…Introduction and Objectives: A number of sophisticated methods have been used to identify the degree of vertebral rotation. …”
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1194
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1195
Tribocontact surface exploration after friction in hexanoic acid solution
Published 2019-12-01“…The paper considers the evolution of friction coefficient of the pair of copper - steel alloy under friction in a hexanoic acid solution in various concentrations, and antiwear properties of the steel-steel friction pair in an oil-acidic medium. …”
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1196
Novel derivative of nicotinic acid ameliorates doxorubicin-induced cardiac injury via regulation of redox homeostasis
Published 2024-09-01“…After 48 hours, the parameters of left ventricular contractility and StTTI coefficient were assessed on isolated heart in the Langendorff system under the conditions of 480 beats per minute for 11 seconds. …”
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1197
Optimization of friction and electrical resistance performance in graphite-copper electrical contacts using Taguchi-based grey relational analysis
Published 2024-01-01“…A gray relational grade obtained from gray relational analysis was employed to assess the performance characteristic in the Taguchi mixed L18 (2 1 x 3 2) method. The Taguchi design method determined the optimal control factors that affect the friction coefficient and electrical resistance. …”
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1198
Cloud point extraction coupled with Isooctane back extraction for determination of eight pesticide residues in tea beverages by gas chromatography mass spectrometry
Published 2023-04-01“…The average recovery was 78.3%~98.4%, RSD was 2.7%~8.5% (n=6). Conclusion: The method is simple in operation, high in enrichment rate, practical, safe and economical, which is suitable for rapid determination of pesticide residues in tea drinks.…”
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1199
Determination of 17 types of phthalates in drinking water by solid-phase extraction coupled with multiple reaction monitoring of gas chromatography-mass spectrometry
Published 2025-01-01“…The precision and accuracy of this method were assessed by determining the standard curves, detection limits, quantification limits, relative standard deviations (RSD) and average spiked recovery rates for the 17 types of PAEs. …”
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1200