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Calibration curve
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To screen the risk factors affecting the recurrence risk of patients with ampullary carcinoma (AC)after radical resection, and then to construct a model for risk prediction based on Lasso-Cox regression and visualize it.
10p
vikoch
27-06-2024
3
1
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Ebook "Metrology in chemistry" presents the essentials every chemist needs to know about how to obtain reliable measurement results. Starting with the basics of metrology and the metrological infrastructure, all relevant topics – such as traceability, calibration, chemical reference materials, validation and uncertainty – are covered. In addition, key aspects of laboratory management, including quality management, inter-laboratory comparisons, proficiency testing, and accreditation, are addressed.
201p
tracanhphuonghoa1007
22-04-2024
4
3
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Ebook "Titration calorimetry: From concept to application" describes the calibration of titration calorimeters (ITCs) and calculation of stoichiometry, equilibrium constants, enthalpy changes, and rate constants for reactions in solution. A framework/methodology for model development for analysis of ITC data is presented together with methods for assessing the uncertainties in determined parameters and test data sets.
60p
tracanhphuonghoa1007
22-04-2024
8
2
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In order to make a reliable QPE product, a quality check for rain gauge data comparing mutual rain gauge data experimented and 1) missing data ratio, 2) proportion to mean of nearly ten stations, and 3) double sum curve check was selected as thresholds to select relatively reliable rain gauge stations. As a result of the quality check for rain gauge data in May 2023, 1,299 stations were chosen, and QPE with rain gauges selected showed stable precipitation distribution.
7p
vishekhar
01-11-2023
5
1
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This paper presents the results of determining the coefficient of friction when cold plastic deformation by the method of cold ring upsetting with different lubricants. The ring upsetting process is performed with varying degrees of deformation with three lubricants used: industrial oil, cooking oil, and zinc sulfate powder. Based on the deformation and dimension change of the samples after the upsetting, the coefficient of friction was determined by correlation comparison with the friction calibration curve performed by Male and Cockcroft.
9p
giangnhanly
02-10-2023
8
3
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To keep the accredited category for the gamma spectrometry test in our laboratory, the efficiency curves of a HPGe detector for soil sample in Marinelli geometry were determined by “efficiency transfer” principle via the ANGLE3 commercial software and Monte Carlo simulations via MCNP5 and GEANT4.
6p
vicedric
08-02-2023
8
3
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Bladder cancer has the characteristics of high morbidity and mortality, and the prevalence of bladder cancer has been increasing in recent years. Immune and autophagy-related genes play important roles in cancer, but there are few studies on their effects on the prognosis of bladder cancer patients.
11p
vihagrid
30-01-2023
6
3
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Japanese silicate rock standard samples and the S2 Ranger XRF Spectrometer are utilized to create a calibration curve for analyzing major element concentrations of silicate rocks. The calibration curve created by the S2 Ranger XRF Spectrometer is proved to be suitable for analyzing major element concentrations of silicate rocks.
8p
vinikolatesla
31-03-2022
10
2
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Results demonstrates that the proposed calibration procedure leads to a balanced frequency response curve and thus improves the performance of the TLCD comparing with the calibration procedure ignoring background flexibility.
18p
guernsey
28-12-2021
12
0
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Although postoperative pulmonary infection (POI) commonly occurs in patients with esophageal cancer after curative surgery, a patient-specific predictive model is still lacking. The main aim of this study is to construct and validate a nomogram for estimating the risk of POI by investigating how perioperative features contribute to POI.
7p
vimackenziebezos
29-11-2021
7
2
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In the present work, a simple automated microplate method based on cupric ion reduction is described for determining total reducing sugars in food extracts and synthetic serum. The reaction of Cu(II)-Nc (cupric-neocuproine) with reducing sugars was performed in alkaline medium in microplates, and the absorbance of the formed highly colored Cu(I)-Nc chelate in a plate reader at 450 nm was recorded. The proposed method was applied to reducing sugars (glucose, fructose, galactose, maltose, and lactose) and their linear calibration curves were constructed.
14p
tudichquannguyet
29-11-2021
11
1
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The present study focused on the evaluation of the antioxidant properties and the determination of total phenols and flavonoids Spathodea campanulata P. Beauv by spectrophotometry. Quantitative analyzes of total phenols and flavonoids were determined from the linear regression equation of the calibration curve, that is plotted using gallic acid and quercetin respectively as standard.
10p
chauchaungayxua12
29-07-2021
16
1
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A new method based on LC-ICP-MS technique has been developed and validated for the simultaneous determination of borax and polyphosphates (phosphate, pyrophosphate, tripolyphosphate) in foods. The analytes were extracted from the samples with 18 mM sulfuric acid solution using ultrasonic vibration extraction technique before being filtered and analyzed by LC-ICP-MS system. The method was validated with calibration curves that have the coefficient of determination (R2 ) higher than 0.995.
12p
chauchaungayxua12
11-07-2021
8
1
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By pre-treating potato strips in different conditions of enzyme concentrations, pH, temperature and frying time, the effects of these parameters on acrylamide levels in fried products were evaluated by measuring UV-Vis spectra of sample solutions containing acrylamide. The maximum absorbance values at 224 nm were used to determine the acrylamide concentrations by calculation from a calibration curve.
7p
larachdumlanat127
02-01-2021
11
2
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These compounds were separated on a C30 chromatography column with ethyl acetate: acetonitrile (12:88, v/v) containing 0.1% n-decanol as the mobile phase. Xanthophyll compounds, usually existing in the form of esters, were saponified in 45% KOH solution (with lutein and zeaxanthin) and 1% (with astaxanthin) at 60°C within 15 minutes, then re-extracted with n-hexane before analyzing on HPLC system. The method was validated and had good specificity and selectivity. The linear calibration curve in the range of 0.
6p
kethamoi9
01-12-2020
4
2
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The real-time quantitative polymerase chain reaction (qPCR) is routinely used for quantification of nucleic acids and is considered the gold standard in the field of relative nucleic acid measurements. The efficiency of the qPCR reaction is one of the most important parameters in data analysis in qPCR experiments.
12p
vijisoo2711
27-10-2020
13
0
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To validate the determination method of nifedipine (NIF) in dog plasma by ultra performance liquid chromatography with tandem mass spectrometric detection (UPLC-MS/MS). The evaluation of the specificity, selectivity, lower limit of quantitation, accuracy, precision, calibration curve and the linear range, recovery, carry-over, matrix effect, stability of NIF in plasma following the guidance of US-FDA.
11p
kequaidan7
04-09-2020
25
1
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For selected locally advanced prostate cancer (PCa) patients, radical prostatectomy (RP) is one of the first-line treatments. We aimed to develop a preoperative nomogram to identify what kinds of patients can get the most survival benefits after RP.
10p
vikuala271
13-06-2020
18
3
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Circulating microRNAs are undergoing exploratory use as safety biomarkers in drug development. Reverse transcription quantitative polymerase chain reaction (RT-qPCR) is one common approach used to quantitate levels of microRNAs in samples that includes the use of a standard curve of calibrators fit to a regression model.
9p
vihamax2711
21-04-2020
8
0
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The research group of the Nuclear Research Institute (NRI) studied and successfully produced thermoluminescent dosemeters (TLDs) using powder material of CaSO4:Dy. For external personal dosimetry in quantity of Hp(10), dosimetric parameters of the TLDs are examined by irradiating with various gamma doses of 137Cs source and measuring by Rexon-320 reader, including glow curve with temperature, calibration factor...
8p
viatani2711
14-02-2020
11
1
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