Please provide explanation for the fact that PHBV-61 did not show methylene bands.ġ1. Please correct: 2933 is assigned to the methylene group vibration. , Table 3 – please correct the clearness of the table, it is difficult to read. The band assignment comes from the researcher’ analysis.Ī poor correlation between IR and DSC results is quite normal.ġ0. , section FTIR spectra analysis, line 236 – “Purified PHBV samples were analyzed by FTIR spectroscopy to gain insight into its chemical structure and band assignments results are given in Table 3.” – please correct, IR analysis allow to investigate functional groups, not the band assignments. The standard deviation for DSC and TG is impossible to calculate as only 2 values have been determined for each parameter.ĩ. , Table 2 – please consider to divide this table in two, as the table is difficult to read. , lines 211-217 – please correct the sentence as it is hardly to understand.Ĩ. Mechanical properties – please provide if possible the information about the standard for tensile testing.ħ. The same for the rest values measured, as molecular weight “M”, temperature “T”.Ħ. Please correct the eq.1, H values should be italic, as well as “X”. Please provide DSC (showing both heating scans) and TG/DTG curves.
Averaging is ok for those results, however evaluation of standard deviation is a serious mistake, as 2 values for such evaluation is too less. the type of the crucible, the gas flow, calibration of the instrument.
Thermal analysis – please provide more information about the measurements, i.e. Moreover, ATR mode is less sensible itself, as the measurement strongly related to the power of sample press to the crystal (the contact with the crystal).ĥ. Remember as well, that those values may differ form DSC data, as it is completely different method. Please consider to repeat the measurements, averaging, normalization and curve fitting procedure. It seems that the results of curve fitting may be wrong as too less measurements have been performed and the curve fitting procedure refer to only 2 peaks in the region of carbonyl vibration of ca. What was the type of normalization? Please provide more information on the curve fitting procedure, for example what was the type of signal Gaussian or other. In ATR mode it is normal to take at least 5 measurements per sample and average values present. FTIR spectroscopy – why only 2 measurements have been performed for these materials. line 103 – please include explanation for the samples code: “e.g., PHBV-15 – PHBV at 15 th operational day (for example.Ĥ. , abstract, line 17 – please include “3HB” explanation.ģ. , Title – please include the “HV” explanation, as not every reader should know what it means.Ģ. I have read your paper and have some comments, which will help in proper revision of your paper. Effect of HV content on Thermal, Mechanical, and Rheological properties of PHBV biopolymers produced from fermented dairy manure by
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