Furthermore, the C=O and COO absorption band maxima were shifted towards lower WN values, while the OMcat absorption band was shifted towards higher WN values. The shift of OMcat band maxima was two times higher than that of the C=O band maximum and increased with Ca concentration. ...
All these values are interrelated. We like to use something called wave number, which is basically the amount of waves per cm. The reason why IR spectroscopists use this is because it enables us to use normal numbers rather than a ZIILION or GIGA!! Mid Infrared covers the region from ...
Meanwhile, a higher mineralisable carbon fraction was found in the urban waste, with municipal soil waste (MSW) and limed sludge having the highest values (Cm91d > 50%) in the whole sample set. In addition, composted MSW seemed to have higher Conclusions The FTIR–PAS spectra revealed ...
The relative standard deviation (RSD) values for proposed method were less than 2%, which established the precision and accuracy of the method. 3.6. Real sample analysis To investigate suitability of developed method, the real samples have been analyzed and studied using different samples from soil...
Similar calorific values have previously been found in P. × euramericana wood from a short rotation plantation (average calorific value: 19.3 MJ kg-1; [15]), whereas straw of agricultural crops generally contains lower energy contents (Glycine max (L.) Merr.: 17.0 MJ kg-1, Sorghum bicolor...
Imputation techniques were subsequently applied to address these gaps, utlitizing the SimpleImputer with the “most frequent” strategy to replace missing values with the most commonly occurring value in each attribute. 2.2.2 Data splitting To ensure an unbiased evaluation of model performance, the ...
All tests were performed in three replicates, and values were expressed as means ± standard deviations (SDs). Statistical analyses were performed using Statistica software (Statsoft Inc.) at a significance level ofα = 0.05. The data were analyzed using analysis of variance, and the ...
Based on the results of this experiment, ions of several different m/z values were selected and their intensities individually monitored in a second experiment (multiple ion detection, MID). The MS ion intensities recorded were m/z 15, 16, 17, 18, which are characteristic for water and ...
Table 3. Fourier-transform infrared spectroscopy peak values of Calotropis procera. NoPeak (wave number cm −1)IntensityBondFunctional group assignmentRemark an assignment 1 3391 Weak broad O–H Hydroxyl group stretching vibrations of O–H bond in alcohols or phenols 2 2917 Strong C–H Alkane ...
The RMSECV and R2 values obtained with cross validation points; again, the best results were obtained without baseline and 5 factors (R2 = 0.9994, RMSECV = 1.174). Fig. 4 shows the plot of RMSECV as the function of the variables. Following the first factor, the RMSECV rapidly declines ...