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Calibration curves

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Intrinsic Efficiency Calibration for Uranium Isotopic Analysis in Soil Samples

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Table 1 shows the calculated activity ratios 214 Pb / 214 Bi and 238 U/ 214 Bi corresponding to three different configurations: G1, G 2, G 3. 1 and table 1 to see that: three different different measurement configuration, the relative efficiency calibration curves are different forms, however the results of the activity ratio 214 Pb / 214 Bi and 238 U/ 214 Bi determined by three measuring configurations is almost the same.

Predicting response to immunotherapy plus chemotherapy in patients with esophageal squamous cell carcinoma using non-invasive Radiomic biomarkers

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(B) Calibration curves of the nomograms built on 3D uncorrected, 3D corrected, 2D uncorrected 2D corrected radiomics features in the training cohort. (C) Calibration curves of the nomograms built on 3D uncorrected, 3D corrected, 2D uncorrected 2D corrected radiomics features in the validation cohort.

Construction of an 11-microRNA-based signature and a prognostic nomogram to predict the overall survival of head and neck squamous cell carcinoma patients

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The differences in the signature between predicted survival and actual survival were assessed and calibration curves were constructed. The C-index values were calcu- lated to measure the predictive performance of the risk signature.

Determination of N-acetylcysteine in the presence of ciprofloxacin or levofloxacin in microparticulate dry powder inhalers

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Regression analysis of the calibration curves showed linearity between peak areas and the corresponding CP, LV, and NAC concentrations. Since there was no significant difference between the calibration curves, only linearity data in the mobile phase for all compounds were demonstrated (Table 1).. The linearity data of the validated method (n = 6).. The LOD values were 0.098 µg/mL for CP, 0.049 µg/mL for LV, and 0.487 µg/mL for NAC.

Construction and validation of the prognostic model for patients with neuroendocrine cervical carcinoma: A competing risk nomogram analysis

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NECC: Neuroendocrine cervical carcinoma. the histogram and survival curves were represented based on cut‑off points (B, C). acterisitcs of patients with NECC form the Wenling Maternal and Child Health Care Hospital dataset. The calibration curves of external validation cohort show the nomograms‑predicted rates (X‑axis) are correspondent with the actual survival rates (Y‑axis), including the 3‑year CSS (A) and OS (B), and the 5‑year CSS (C) and OS (D). FIGO stage Internal validation.

Development of a biosensor platform based on ITO sheets modified with 3-glycidoxypropyltrimethoxysilane for early detection of TRAP1

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When the calibration curves are investigated, the appropriate period for the interaction between TRAP1 and anti-TRAP1 immobilized on the surface was 30 min. Characterization of the biosensor performance. After the optimization experiments a TRAP1 calibration graph was plotted at the optimum working conditions with the biosensor fabricated by optimum preparation combination.

Cardiopulmonary exercise testing and pulmonary function testing for predicting the severity of CTEPH

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The per- formance of CPET parameters for predicting severe CTEPH was determined by receiver operating characteristic (ROC) curves and calibration curves.. AT (L/min) and VO 2 @ peak (mL/kg/min) had a moderate utility value in identifying severe CTEPH with the AUC of 0.843.. CPET has been widely carried out in patients with pulmonary hyperten- sion (PH), heart failure (HF), chronic obstructive lung disease (COPD), asthma, etc.

A stemness-based eleven-gene signature correlates with the clinical outcome of hepatocellular carcinoma

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HCC dataset. d Calibration curves of the developed nomogram for predicting OS in the ICGC HCC dataset.

Nomogram predict relapse-free survival of patients with thymic epithelial tumors after surgery

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Internal calibration curves for the three- and five-year RFS closely matched those of the baseline in the training cohort (Fig. Verification of the nomogram. To better verify the actual predictive power of the nomogram, the above results were verified using the verification group data, showing that the C index was CI and the five-year and three-year external calibration curves met those of the standard baseline (Fig.

Simultaneous analysis of losartan, its active metabolite, and hydrochlorothiazide in human plasma by a UPLC-MS/MS method

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CV) in the measurement of the slope of calibration curves. The % CV values of the slopes of calibration lines in ten different plasma lots were and 3.19 for LOS, EXP-3174, and HCTZ, respectively.. Matrix factor for losartan, EXP-3174, and hydrochlorothiazide.. The detailed results for bench top stability, wet extracts, dry extracts, processed sample, and freeze-thaw and long-term stability of the analytes are summarized in Table 6.

A new nomogram and risk classification system for predicting survival in small cell lung cancer patients diagnosed with brain metastasis: A large population-based study

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And ROC curves were used to evaluate the discrimination ability of the newly constructed nomogram. The calibration curves showed that the predicted value of the 1- and 3-year survival rate by the nomogram was in good agreement with the actual observed value of the 1- and 3-year survival rate. And, the ROC curves implied the good discrimination ability of the predictive model.

Identification of tumour immune microenvironment-related alternative splicing events for the prognostication of pancreatic adenocarcinoma

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C Time-dependent ROC curves of the AS clinical nomogram at 1 – 3 years. D-F Calibration curves of the AS clinical nomogram at 1 – 3 years. A Bar graph of the 20 most significant terms from the GO functional annotation and immune signature analysis. B-C Cluster ID and p value of the results of enrichment analysis.

Drugs and Poisons in Humans - A Handbook of Practical Analysis (Part 36)

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ASA (Sigma) is dissolved in methanol. for calibration curves, solutions of ASA and its metabo- lites at 0.2–10 µ g/mL are prepared.. fl ow rate: 1.5 mL/min. A 200- µ L volume of plasma c , 50 µ L phosphoric acid and 600 µ L ethyl acetate are placed in a small centrifuge tube.. A 400- µ L volume of the organic phase is transferred to a small glass vial, and evaporated to dryness under a stream of air in an ice bath..

A simple automated microplate method for determining reducing sugars in food extracts and synthetic serum using cupric-neocuproine as reductant

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Standard calibration curves of tested reducing sugars with respect to the proposed method are presented in Figure 3. When Table 2 is examined, the sensitivity of the proposed method is observed to be higher because the LOD value is much lower than those of the other literature methods.. Standard calibration curves of tested reducing sugars with respect to the microplate Cu(II)-Nc method..

An effective N6-methyladenosine-related long non-coding RNA prognostic signature for predicting the prognosis of patients with bladder cancer

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(a) Kaplan – Meier curves for the m6A-RLPS. Calibration curves of the risk score based on the nomogram.

Spectrophotometric methods for the determination of fluoride ion using indole-3-acetic acid interaction with iron(III)

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The UV spectra of the solutions containing different concentrations of fluoride ion and their calibration curves are given in Figures 5 and 6.. different amounts of fluoride ions to the complex structure formed between Fe 3+ and indole-3-acetic acid. and 1.0 mL F. λ = 525 nm. The calibration curve obtained for fluoride concentrations between 2.0 and 20.0 ppm ( λ: 525 nm;.

Prognostic Nomogram for patients undergoing radical Pancreaticoduodenectomy for adenocarcinoma of the pancreatic head

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The calibration curves of the nomogram for predicting 1- and 2-year OS closely matched the ideal 45-degree line in the primary set (Fig. 4b), meaning that the predictive power of the nomogram was significantly good. Although the calibra- tion curves of the nomogram for predicting 3-year OS slightly deviated from the ideal 45-degree line in the pri- mary set and validation set, notably, the c-indexes of the nomogram were and . 0.807) in the primary set and validation set, respectively..

An ultrasensitive electrochemical immunosensor platform based on disposable ITO electrode modified by 3-CPTMS for early detection of parathyroid hormone

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Optimum operating conditions were tested with calibration curves obtained during optimiza- tion experiments and the reproducibility and repeatability of the PTH biosensor were also tested. The EIS curves and CV voltammograms for the immobilization steps of the biosensor designed for PTH determination are shown in Figure 2. The goodness of fit values of the measurements from the immobilization steps in Figure 2 were calculated and presented as a table (Table 1).

Introduction to Modern Liquid Chromatography, Third Edition part 58

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Figure 11.10 Use of the method of standard addition to determine analyte concentration at x-axis intercept (arrow). 11.4.1.5 Evaluating Calibration Curves. Plots for wide concentration-range calibration curves, such as those of Figures 11.8 and 11.9 can be hard to interpret when a linear x-axis is used, because the low concentration points are crowded together. The benefit of the %-error plot is shown in Figure 11.11 for a data from a hypothetical method-validation study.

Drugs and Poisons in Humans - A Handbook of Practical Analysis (Part 41)

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For constructing calibration curves, various concentrations of salicylic acid and a fi xed amount of IS are processed according to the same procedure.. Figure 9.2 shows HPLC chromatograms for the authentic standard salicylic acid and for the extract of human serum, into which salicylic acid and IS had been spiked. In this method, the linearity of salicylic acid was found in the range of 20–500 µ g/mL.