Effect of Hop β-Acids Extract Supplementation on the Volatile Compound Profile of Roasted Chicken Meat
, Daniel Rodrigues Cardoso and Stanislau Bogusz, Junior *
Round 1
Reviewer 1 Report
Please see attached file.
Comments for author File: 
Comments.pdf
Author Response
The detailed response to reviewer can be found in the attached file.
Author Response File: Author Response.pdf
Reviewer 2 Report
Comments
There are some unanswered questions which are listed below.
1. If the authors can provide a graphical abstract, that would make the article even stronger
2. Line 59: "However, there are no reports regarding the impact of supplementation with hop beta acids....." - A simple Google scholar search on this topic resulted into few articles. One such report, A. Zawadzki et al. Food Research International 105 (2018) 210–220, illustrated the effect of hop β-acids as dietary supplement for broiler chickens using GC-MS and multivariate optimization tools like PCA. Why should your article considered to be unique one? What differentiate your article vs the above-mentioned article and other articles in literature.
3. Line 118: Authors have examined five types of SPME fibers. Each fiber is chemically different and the SPME parameters need to be optimized separately to get the maximum response. In this report, experiments were carried out in same extraction conditions with all fibers, and the best fiber was chosen based on the total area of all the peaks in a chromatogram. How the authors came up with these conditions? This selected condition may not be enough for all five SPEM fibers. Can author please elaborate in this context? It would be interesting to comprehend the affinity of these different analytes with the various tested fibers. In addition, please provide a chromatogram.
4. Line 166: Please provide a citation at the end of this line
5. Line 177: All the GC analysis are performed on a CCD detector? Do the authors have a MS detector? If yes, please provide details.
Author Response
The detailed response to reviewer can be found in the attached file.
Author Response File: Author Response.pdf
Round 2
Reviewer 2 Report
This paper mainly presents assessment of volatile compounds in roasted chicken supplemented with hop beta acids using SPME-GC. The technical and presentation aspects appear to be good enough.
The authors have revised the article according to Reviewer's comments which has improved the overall quality of the manuscript.
However, a graphical abstract still missing. With this suggestion, I think that the paper can be accepted in processes.
Author Response
Dear Reviewer 2, we really appreciate your comments on this new round of reviews. Actually, we had prepared a graphical abstract (GA), but we didn't upload the file. We apologize for this error. Anyway, now you can found the GA file as requested.
Best regards.
Author Response File: Author Response.JPG
