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Author Guidelines

  • Introduction

Thamar University Journal of Natural & Applied Sciences (TUJNAS) is a peer-reviewed, open-access journal published twice a year by Thamar University, Dhamar, Yemen. The journal aims to publish original, review, case-study, editorial, and short-letter articles in the fields of pure and applied sciences, agriculture, engineering, medicine, environment, computer science, information technology, pharmacology, veterinary medicine, and dentistry.

 

  • Types of contributions or publications

Authors can publish a wide range of articles in the Thamar University Journal of Natural and Applied Sciences (TUJNAS):

  • Full-length articles,
  • Review articles,
  • Short communications,
  • Systematic reviews,
  • Editorials,
  • Perspectives,
  • Letters to the editor,
  • Commentaries and supplements,
  • Conference proceedings and
  • Case studies.

 

  • Format of submitted files: All submitted files (such as manuscripts, Figures, Tables, … etc.) should be provided in an editable format using the extension .doc/.docx for Word files and .tex for LaTeX files. A PDF is not an acceptable source file.

 

  • Manuscript preparation and Rules

All pages should be numbered consecutively, including those containing diagrams, tables, and figures. Diagrams, Tables, and Figures could be submitted either in separate sheets of the main file of the manuscript or with the manuscript file and placed after the text. The SI system should be used for all scientific and laboratory data. Abbreviations for units should follow the suggestions of the British standards publication BS 1991. The manuscript should be written in a single-column format with double-spaced lines.

  • The manuscript sections: The manuscript should be divided into sections, using headings (e.g., Abstract, Introduction, Experimental part, Results and Discussion, Conclusions, Acknowledgements, and References).
  • The title of the manuscripts (14 Times New Roman bold): It should be concise but informative. Authors should avoid unusual abbreviations in titles. It is recommended that titles do not exceed 20 words in length.
  • Author List (12 Times New Roman normal bold): Include all who have contributed substantially to the work. To facilitate indexing and retrieval and for unique identification of an author, use first names, initials, and surnames (e.g., Ahmed M. Saeed) or first initials, second names, and surnames (e.g., A. Mohammed Saeed). At least one author must be designated with an asterisk as the person to whom correspondence should be addressed.
  • Institution Address (12 Times New Roman normal): The author’s affiliation(s) listed should be the institution(s) where the work was conducted. If the present address of an author differs from that at which the work was done, that address should be given in an Author Information note.
  • The Abstract (12 Times New Roman normal): It should consist of a brief and factual account of the contents and conclusions of the paper, in addition to an indication of any new information that it may contain and of its relevance. No references should be given in the Abstract.
  • The Introduction (12 Times New Roman normal): This should clearly state the reasons for the work, including the problem statement of work and what is new in the article, with brief references to previous work on the subject.
  • The Main Text (12 Times New Roman normal): use four or fewer headings (e.g., Experimental, Results, Discussion, Conclusions). The heading and subheadings should be bold, while the sub-subheadings should be bold and italic. The footnotes should be avoided. Indicate the proper positions for inserting tables and figures in the manuscript.
  • Tables: Tables should be numbered consecutively, and each table should have a short informative heading as a table caption.
  • Figures: A caption for each Figure should be provided. All figures should be numbered consecutively and cited in the manuscript text. Number figures according to the sequence in which they appear within the manuscript text. Images used as Figures or diagrams could be saved as TIFF, JPG, or PNG files using a minimum of 300 dpi (min. 1063 pixels, full page width: 2244 pixels) for color or grayscale photographs (halftones) while using a minimum of 1000 dpi (min. 3543 pixels, full page width: 7480 pixels) for the bitmapped line drawings. Images that combine bitmapped lines/halftones (color or grayscale) should be saved as TIFF, JPG, or PNG files using a minimum of 500 dpi (min. 1772 pixels, full page width: 3740 pixels).
  • References: The author ensures that every reference cited in the text is also present in the reference list (and vice versa). Unpublished results and personal communications are not recommended in the reference list.
  • Reference style (In the text): In the text, indicate references by number(s) in square brackets that align with the text. The actual authors can be referred to, but the reference number(s) must always be given. Example: "These results agree with previous studies [5,7]. Williams et al. [9] obtained different results ....".
  • Reference style (In the list): In the reference list, in numerical order in square brackets [ ] at the end of the paper. The list should list each reference in the following order (Example in list):

Journals: [5] Singh, A.K., Pal, P., Gupta, V., Yadav, T.P., Gupta, V., Singh, S.P. (2018) Green synthesis, characterization and antimicrobial activity of zinc oxide quantum dots using Eclipta alba, Materials Chemistry and Physics 203: 40-48.

Books: [8] Smith, J.D.H. (2008) Introduction to Abstract Algebra, 1st ed., CRC Press, Boca Raton, FL, USA.

Chapter in Book: [12] Zhu, X., Pathakoti, K., Hwang, H.-M., Green synthesis of titanium dioxide and zinc oxide nanoparticles and their usage for antimicrobial applications and environmental remediation, in: Shukla, A.K., Iravani, S., (Eds.), Book (2019) Green synthesis of titanium dioxide and zinc oxide nanoparticles and their usage for antimicrobial applications and environmental remediation, Elsevier, Amsterdam, Netherlands, pp. 223-263.

Thesis: [4] David, M.L. (2022) Detection of Bio-organism via Ag Nanoparticles. Physics, Ph.D. thesis, Berlin University, Berlin, Germany.

Submission Preparation Checklist

Before submission: Authors must confirm that the manuscript is within the journal’s scope; is original and not under simultaneous review; follows the Author Guidelines; contains complete authorship, affiliation and ORCID information in the submission system; and includes all required ethics, consent, competing-interest, funding, contribution, data-availability, AI-use and related-work declarations.

 

Anonymized manuscript: For double-anonymized review, the review file must not contain author names, affiliations, acknowledgements, identifiable file properties or self-references that unnecessarily reveal identity. Author information and declarations are entered in the submission system or a separate title page.

 

Editorial handling and peer review: Following submission, the editorial office conducts an initial technical, ethical, and scope assessment. Manuscripts that pass this assessment are assigned to a qualified, non-conflicted handling editor, who coordinates double-anonymized peer review by at least two independent expert reviewers. The handling editor administers the review process and does not replace or count as one of the required independent reviewers.

 

Conflicts: An editor with a personal, professional, institutional, supervisory, collaborative or financial conflict must recuse and must not access the file, select reviewers or influence the decision. Submissions from journal personnel and Thamar University colleagues are handled independently under the Recusal Policy.

 

Files and reporting: Figures and tables must be cited and supplied in the required format; references must be accurate; reporting guidelines must be used where applicable; and supplementary files must not contain confidential or identifying information unless required and protected.

 

Fees and license: The author has read the current Publication Fees and Waiver Policy, Open Access Statement, Licensing Policy and Copyright Policy. No submission fee is charged. Any publication fee becomes payable only after formal acceptance, subject to an approved waiver or discount.

 

Final confirmation: Submission confirms agreement with the Author Declaration and responsibility for the accuracy of all metadata and files.

 

Submission files:

 

  1. Cover letter (Optional): It will be read by the Editor-in-Chief, Editorial Director, or a member of the Editorial Board.
  2. Highlights of Research (Optional): It will be seen by the Editorial Board and reviewers. 
  3. Manuscript file (Required): Should be submitted only one file of the format.
  4. Figure file(s) (Required): Either submitted in a separate file or included in the Manuscript File.
  5. Table file(s) (Required): Either submitted in a separate file or included in the Manuscript File.
  6. Supplementary information (Optional): Should be submitted as a separate file. 1- Cover letter (format of file: .doc, .docx, .pdf): The cover letter must include the following essential information:  Editor’s name (when known),  Name of the journal to which you are submitting,  Manuscript’s title,  Article type (review, research, case study, etc.),  Submission date,  Brief background of the study and the research question you sought to answer,  Brief overview of the methodology used,  Principle findings and significance to the scientific community,  Corresponding author's contact information, and  Statement that your article has not been previously published and is not currently under consideration by another journal and that all authors have approved of and have agreed to submit the manuscript to this journal. 2- Highlights of Research (format of file: .doc, .docx, .pdf): Highlights can consist of a brief summary of your results. They inform the reader about what makes your article unique and why your manuscript is worth reading in light of the many published articles and not just another article. 3- Manuscript file (format of file: .doc, .docx, .tex): Title: should be a precise statement describing the main idea of the article and not contain puns or idiomatic expressions. Also, it exactly matches the title for supplementary information. Authors: for authors, the following information should be included: 
  • All authors' (corresponding and contributing) details, such as given and family names, affiliations, etc., are included in both the Manuscript file and in the submission system.
  • The corresponding author(s) are recognized using an asterisk. The email address(es) of the corresponding author(s) should be provided on the title page.

Experimental and methods section: It should be included in the Manuscript file and contain sufficient details. For experiments involving human subjects (or tissue samples), this section must include a statement that:

1) Identifies the institutional and/or licensing committee that approved the experiments, including any relevant details.

2) Confirms that all experiments were performed in accordance with relevant named guidelines and regulations.

3) Confirms that informed consent was obtained from all participants and/or their legal guardians. For experiments involving live vertebrates and/or higher invertebrates, this section must include a statement that: 

A- Identifies the institutional and/or licensing committee that approved the experiments, including any relevant details.

B- Confirms that all experiments were performed in accordance with relevant named guidelines and regulations.

C- Confirms that the authors complied with the ARRIVE guidelines. For experiments involving participants such as patients, the following notes must be attended to: 

  • Study participants' names (and other personally identifiable information) must be removed from all text/figures/tables/images.
  • For manuscripts that contain information or images that could lead to the identification of a study participant, the experimental and methods section must include a statement confirming that informed consent has been obtained to publish the information/images in an open-access online publication. The use of colored bars/shapes, or blurring, to obscure the eyes or face of study participants is not an acceptable method of anonymization.

Competing interests: The declaration of competing interests can be found in the manuscript file under the heading “Competing interests”. Competing financial and non-financial interests should be disclosed.

Captions: Each table and each figure must be accompanied by a caption. These should be inserted either with each table and figure in the Figures and Tables files or at the end of the manuscript after the references. For supplementary figures and tables, include a brief title and caption (incorporated into the file to appear near the image).

References: In a numbered list, all in-line citations should be matched back to a reference via numbering within square brackets. Authors should follow the journal style in the reference list as shown in the Guidelines for Authors.

D- Figure file(s) (format of file: doc, .docx, .jpg, .eps, .tiff, .psd, .png): The Figures submitted must be in the required dimensions with a resolution of no more than 300-600 dpi (dots/pixels per inch). Effective resolutions below 300 dpi often result in a blurry, jagged, or pixelated image that is not optimal for publication, and resolutions above 600 dpi often require resizing or rescaling. Figures should be numbered, followed by a descriptive caption or title. Captions should be brief but comprehensive. They should describe the data shown, draw attention to important features within the figure, and may sometimes include interpretations of the data.

E- Table file(s) (format of file: . doc, .docx): Tables should be designed carefully to communicate your results clearly to busy researchers. Make sure all tables are noted in the text, in order. List footnotes and abbreviations using symbols or letters.

F- Supplementary Information (format of file: .txt, .gif, .doc, .jpg, .swf, .mov, .xlsx, .pdf, .ppt, .wav, .csv, .zip): Supplementary material is relevant material that appears in addition to the main article. This can be anything from tables and presentations to video and audio files.

Full-length articles

A full-length article is a comprehensive study on a specific topic that includes data, research findings and analysis. Academic articles vary in length depending on the field of research and the type of article, but are usually between 3000 and 10,000 words in length.

Review articles

A well-written review article must summarize the most important research findings, refer to articles worth reading, describe current consensus as well as controversies and debates, point out gaps in knowledge, identify unanswered questions and suggest directions for future research.

Short communications

Short communications do not cover in detail background information about the problems treated or the applications, rather they provide key pointers to the reader. Short communications include a short abstract, a brief introduction, a materials and methods section, and a brief results and discussion part.

Letters to the editor

Letters to the editor should contain objective and constructive interpretations or discussions of medical, scientific or general interest topics. They should have a purpose and convey a message in short and clear language.

Case studies

Case studies usually present an important program intervention or policy option relevant to the journal's field. Manuscripts that include a rigorous evaluation of the processes and impact of the study, as well as recommendations for the future, are generally favorably reviewed.

Copyright Notice

Authors retain copyright in their published articles.

By submitting a manuscript to TUJNAS, authors confirm that the work is original, has not been published previously, and is not under consideration by another journal. If the manuscript is accepted for publication, the authors grant TUJNAS a non-exclusive right of first publication and a non-exclusive right to publish, reproduce, distribute, preserve, archive, index, and make the article available online as the version of record.

This agreement does not transfer copyright from the author(s) to TUJNAS. Authors remain free to reuse, share, deposit, archive, and distribute their work, provided that proper citation is given to the original publication in TUJNAS and that reuse follows the license displayed on the article page.

Articles published from Volume 10, Issue 2, 2025 onward are licensed under the Creative Commons Attribution 4.0 International License (CC BY 4.0). Articles published before this date remain under the license displayed on the individual article page or PDF unless otherwise stated.

For full details, please see the journal’s Licensing and Copyrights policies.

Privacy Statement

The names and email addresses entered in this journal site will be used exclusively for the stated purposes of this journal and will not be made available for any other purpose or to any other party.