Peer Review History
| Original SubmissionOctober 12, 2025 |
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Dear Dr. Seki, Thank you for submitting your manuscript to PLOS ONE. After careful consideration, we feel that it has merit but does not fully meet PLOS ONE’s publication criteria as it currently stands. Therefore, we invite you to submit a revised version of the manuscript that addresses the points raised during the review process. Please submit your revised manuscript by Jan 02 2026 11:59PM. If you will need more time than this to complete your revisions, please reply to this message or contact the journal office at plosone@plos.org . When you're ready to submit your revision, log on to https://www.editorialmanager.com/pone/ and select the 'Submissions Needing Revision' folder to locate your manuscript file.
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Kind regards, Jiafu Li Academic Editor PLOS ONE Journal Requirements: When submitting your revision, we need you to address these additional requirements. 1. Please ensure that your manuscript meets PLOS ONE's style requirements, including those for file naming. The PLOS ONE style templates can be found at https://journals.plos.org/plosone/s/file?id=wjVg/PLOSOne_formatting_sample_main_body.pdf and https://journals.plos.org/plosone/s/file?id=ba62/PLOSOne_formatting_sample_title_authors_affiliations.pdf 2. To comply with PLOS One submissions requirements, in your Methods section, please provide additional information regarding the experiments involving animals and ensure you have included details on (1) methods of sacrifice, (2) methods of anesthesia and/or analgesia, and (3) efforts to alleviate suffering. 3. Thank you for stating the following in the Competing Interests section: This study was conducted as a collaborative research project with Local Power Co., Ltd., and was financially supported by the company. Although some authors (T.S., Y.M., and K.T.) are employees of Local Power Co., Ltd., their primary role was to provide SAEW (slightly acidic electrolyzed water), and the evaluation of its effects was carried out entirely by university staff. All experiments and analyses were conducted objectively and scientifically to ensure the integrity and fairness of the research. Please confirm that this does not alter your adherence to all PLOS ONE policies on sharing data and materials, by including the following statement: "This does not alter our adherence to PLOS ONE policies on sharing data and materials.” (as detailed online in our guide for authors http://journals.plos.org/plosone/s/competing-interests). If there are restrictions on sharing of data and/or materials, please state these. Please note that we cannot proceed with consideration of your article until this information has been declared. Please include your updated Competing Interests statement in your cover letter; we will change the online submission form on your behalf. 4. We note that you have included the phrase “data not shown” in your manuscript. Unfortunately, this does not meet our data sharing requirements. PLOS does not permit references to inaccessible data. We require that authors provide all relevant data within the paper, Supporting Information files, or in an acceptable, public repository. Please add a citation to support this phrase or upload the data that corresponds with these findings to a stable repository (such as Figshare or Dryad) and provide and URLs, DOIs, or accession numbers that may be used to access these data. Or, if the data are not a core part of the research being presented in your study, we ask that you remove the phrase that refers to these data. 5. Please include a copy of Table 1, which you refer to in your text on page 17. 6. If the reviewer comments include a recommendation to cite specific previously published works, please review and evaluate these publications to determine whether they are relevant and should be cited. There is no requirement to cite these works unless the editor has indicated otherwise. [Note: HTML markup is below. Please do not edit.] Reviewers' comments: Reviewer's Responses to Questions Comments to the Author 1. Is the manuscript technically sound, and do the data support the conclusions? Reviewer #1: Yes Reviewer #2: Yes Reviewer #3: Yes Reviewer #4: Yes ********** 2. Has the statistical analysis been performed appropriately and rigorously? -->?> Reviewer #1: Yes Reviewer #2: Yes Reviewer #3: No Reviewer #4: I Don't Know ********** 3. Have the authors made all data underlying the findings in their manuscript fully available??> The PLOS Data policy Reviewer #1: Yes Reviewer #2: Yes Reviewer #3: No Reviewer #4: Yes ********** 4. Is the manuscript presented in an intelligible fashion and written in standard English??> Reviewer #1: Yes Reviewer #2: Yes Reviewer #3: Yes Reviewer #4: Yes ********** Reviewer #1: This study evaluates the efficacy and safety of SAEW applied through spatial spraying, combining aerosol characterization, bactericidal testing, and long-term inhalation exposure in rats. The work is well executed and provides consistent evidence supporting the safety of SAEW as a spatial disinfectant. 1. The Introduction should be expanded to clarify the rationale for conducting in vivo experiments in rats. The authors are encouraged to explain why animal testing is necessary, how it addresses systemic or cumulative effects not captured by in vitro data, and how it links laboratory findings to real-world safety evaluation. 2.The description of the experimental design could be made more transparent. The authors are advised to specify the number of animals in each group and clarify whether randomization or blinding was applied during data collection. Providing supplementary materials with additional data summaries or relevant methodological details would allow readers to better assess the reproducibility and completeness of the study. 3.In the Discussion, I recommend that the authors further elaborate on the study’s limitations and outline directions for future research. If possible, they may also briefly consider potential biological explanations for the absence of adverse findings. Reviewer #2: Major Concerns: 1. The study lacks a detailed discussion on the potential risks of chronic exposure in humans, particularly in sensitive populations. 2. Although SAEW was found safe in rats, extrapolation to human environments (e.g., schools, hospitals) warrants further discussion. 3. The experimental design should mention whether blinding was used during histopathological assessments to minimize observer bias. Minor Issues: 1. The graphical representation of data (e.g., colony counts, particle size distribution) could be improved for clarity. 2. Some parts of the text are overly descriptive and could be streamlined to maintain scientific focus. 3. The potential for formation of disinfection byproducts under various environmental conditions should be acknowledged. Reviewer #3: This manuscript investigates the chronic safety of slightly acidic electrolyzed water (SAEW) applied as an aerosol (“spatial spraying”) in Sprague–Dawley rats over a 3-month period. The study evaluates hematological, biochemical, and histopathological parameters to determine whether repeated SAEW exposure induces any toxicological or inflammatory changes. The topic is relevant to environmental disinfection and public health, particularly in the context of widespread use of SAEW as a disinfectant. The study is generally well organized, and the results are clearly presented. However, several critical methodological details are missing, and the experimental design would benefit from additional rigor and transparency. Major Comments� 1. Missing sample size (n) information The manuscript does not report the sample size (n) for any experiment. In the animal exposure study, the number of rats per group (male and female) is not specified in the Methods, Results, or Table 1, making it impossible to assess statistical power or variability. Similarly, in the bactericidal assays (Figure 2), the statement “each experiment was repeated at least three times” does not clarify whether these were technical or biological replicates. None of the figure legends indicate the value of n or whether the error bars represent SD or SEM. Please provide this information for all datasets to ensure transparency and reproducibility in line with PLOS reporting standards. 2. Insufficient exposure characterization The description of the exposure system in the Methods (“Safety confirmation of aerial sprays of HClO solution in rats”) lacks the quantitative detail needed to assess the actual inhalation dose. The authors report that rats were exposed to 250 ppm HClO solution at 15 mL h⁻¹ for 6 h day⁻¹, 5 days week⁻¹ for 3 months, but this only specifies the liquid concentration, not the actual airborne chlorine concentration or environmental conditions within the chamber. Please provide quantitative or literature-based estimates of airborne HClO levels, along with any information about chamber temperature, humidity, or airflow, to clarify the true exposure conditions. 3. Inconsistent reporting of albumin data and lack of reference ranges In the Results section, the authors mention that both potassium and albumin levels showed statistically significant differences (p < 0.05) but were “within physiological range.” However, albumin data are not presented in Table 1 or any figure, and no reference ranges are provided to justify this interpretation. Please include the albumin data (mean ± SD and p-value) in Table 1 and provide appropriate reference ranges for CD(SD) IGS rats (either from internal data or published literature) to support the statement that all values were within normal limits. This clarification is critical for consistency and for verifying the authors’ interpretation of biochemical results. 4.Ambiguous histopathology interpretation The statement that “minor inflammation was noted in one male control rat, considered an individual variation” is qualitative and lacks supporting evidence. Please clarify whether the histopathological evaluation was conducted in a blinded manner, and consider providing semi-quantitative scoring or representative histological images to substantiate this interpretation. Including these details would improve objectivity and strengthen the reliability of the histopathological assessment. Minor Comments 1. Ensure consistent unit formatting (μL vs µl, mg/dL vs mg dL⁻¹). 2. The Discussion repeats parts of the Introduction; it could be shortened. 3. Clearly define significance levels (*, **, ***) in all figures and legends. Reviewer #4: Subject: Effective and Safe: Long-Term Spatial Spraying of Slightly Acidic Electrolyzed Water Causes No Harm in Rats Manuscript Number: PONE-D-25-54069 Dear Editor, Thank you for the opportunity to revise the manuscript. We would like to share the following issues noted during the revision process and seek your guidance or confirmation where needed: Minor Comments: • Abstract 1. Improve clarity in language by simplifying some sentences and ensuring consistent terminology (e.g., “spatial spraying” vs. “aerosol disinfection”). 2. Ensure units are consistently reported (e.g., mg/L vs. ppm for chlorine concentration). • Results The study is relevant and shows that SAEW is effective for spatial disinfection and appears safe in animal exposure tests. However, some clarifications are needed. Please provide more details on the spraying chamber conditions, include clearer statistical reporting, and briefly justify using only E. coli as the test organism. With these points addressed, the manuscript will be strengthened. • Disscussion The discussion clearly highlights the significance of SAEW in disinfection and its safety for long-term exposure. However, the section could be strengthened by briefly acknowledging limitations, such as the use of only E. coli as the test bacterium and the controlled laboratory conditions. It would also be helpful to emphasize the need for real-world field validation. Overall, the conclusions are reasonable and supported by the data. • Reference Updates Needed: Several references need to be updated or corrected with more recent and relevant citations. ********** what does this mean? ). If published, this will include your full peer review and any attached files. If you choose “no”, your identity will remain anonymous but your review may still be made public. Do you want your identity to be public for this peer review? For information about this choice, including consent withdrawal, please see our Privacy Policy Reviewer #1: No Reviewer #2: No Reviewer #3: No Reviewer #4: Yes: Magda Elsayed Abd-Elgawad ********** [NOTE: If reviewer comments were submitted as an attachment file, they will be attached to this email and accessible via the submission site. Please log into your account, locate the manuscript record, and check for the action link "View Attachments". If this link does not appear, there are no attachment files.] To ensure your figures meet our technical requirements, please review our figure guidelines: https://journals.plos.org/plosone/s/figures You may also use PLOS’s free figure tool, NAAS, to help you prepare publication quality figures: https://journals.plos.org/plosone/s/figures#loc-tools-for-figure-preparation. NAAS will assess whether your figures meet our technical requirements by comparing each figure against our figure specifications. |
| Revision 1 |
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Effective and safe: long-term aerosol disinfection of slightly acidic electrolyzed water causes no harm in rats PONE-D-25-54069R1 Dear Dr. Seki, We’re pleased to inform you that your manuscript has been judged scientifically suitable for publication and will be formally accepted for publication once it meets all outstanding technical requirements. Within one week, you’ll receive an e-mail detailing the required amendments. When these have been addressed, you’ll receive a formal acceptance letter and your manuscript will be scheduled for publication. An invoice will be generated when your article is formally accepted. Please note, if your institution has a publishing partnership with PLOS and your article meets the relevant criteria, all or part of your publication costs will be covered. Please make sure your user information is up-to-date by logging into Editorial Manager at Editorial Manager® and clicking the ‘Update My Information' link at the top of the page. For questions related to billing, please contact billing support . If your institution or institutions have a press office, please notify them about your upcoming paper to help maximize its impact. If they’ll be preparing press materials, please inform our press team as soon as possible -- no later than 48 hours after receiving the formal acceptance. Your manuscript will remain under strict press embargo until 2 pm Eastern Time on the date of publication. For more information, please contact onepress@plos.org. Kind regards, Jiafu Li, Ph.D Academic Editor PLOS One Additional Editor Comments (optional): Reviewers' comments: Reviewer's Responses to Questions Comments to the Author Reviewer #1: All comments have been addressed Reviewer #3: All comments have been addressed Reviewer #4: All comments have been addressed ********** 2. Is the manuscript technically sound, and do the data support the conclusions??> Reviewer #1: Yes Reviewer #3: Yes Reviewer #4: Yes ********** 3. Has the statistical analysis been performed appropriately and rigorously? -->?> Reviewer #1: Yes Reviewer #3: Yes Reviewer #4: I Don't Know ********** 4. Have the authors made all data underlying the findings in their manuscript fully available??> The PLOS Data policy Reviewer #1: Yes Reviewer #3: Yes Reviewer #4: Yes ********** 5. Is the manuscript presented in an intelligible fashion and written in standard English??> Reviewer #1: Yes Reviewer #3: Yes Reviewer #4: Yes ********** Reviewer #1: The authors reasonably replied to all my previous criticisms and comments. The paper was significantly improved. I have no further comments. Reviewer #3: (No Response) Reviewer #4: The authors have satisfactorily addressed all reviewer comments. The revisions have improved the clarity of the methodology, strengthened the presentation of results, and enhanced the overall quality of the manuscript. I find the revised version suitable for publication in its current form and recommend acceptance. ********** what does this mean? ). If published, this will include your full peer review and any attached files. If you choose “no”, your identity will remain anonymous but your review may still be made public. Do you want your identity to be public for this peer review? For information about this choice, including consent withdrawal, please see our Privacy Policy Reviewer #1: No Reviewer #3: No Reviewer #4: Yes: Magda Elsayed Abdelgawad ********** |
| Formally Accepted |
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PONE-D-25-54069R1 PLOS One Dear Dr. Seki, I'm pleased to inform you that your manuscript has been deemed suitable for publication in PLOS One. Congratulations! Your manuscript is now being handed over to our production team. At this stage, our production department will prepare your paper for publication. This includes ensuring the following: * All references, tables, and figures are properly cited * All relevant supporting information is included in the manuscript submission, * There are no issues that prevent the paper from being properly typeset You will receive further instructions from the production team, including instructions on how to review your proof when it is ready. Please keep in mind that we are working through a large volume of accepted articles, so please give us a few days to review your paper and let you know the next and final steps. Lastly, if your institution or institutions have a press office, please let them know about your upcoming paper now to help maximize its impact. If they'll be preparing press materials, please inform our press team within the next 48 hours. Your manuscript will remain under strict press embargo until 2 pm Eastern Time on the date of publication. For more information, please contact onepress@plos.org. You will receive an invoice from PLOS for your publication fee after your manuscript has reached the completed accept phase. If you receive an email requesting payment before acceptance or for any other service, this may be a phishing scheme. Learn how to identify phishing emails and protect your accounts at https://explore.plos.org/phishing. If we can help with anything else, please email us at customercare@plos.org. Thank you for submitting your work to PLOS ONE and supporting open access. Kind regards, PLOS ONE Editorial Office Staff on behalf of Dr. Jiafu Li Academic Editor PLOS One |
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