Guidelines for publication

General - Articles suitable for publication Periódico Tchê Química (PTQ) are those that cover the traditional fields of Chemistry, Biology, Physics, Mathematics, Pharmacy, Medicine, Engineering, Agronomical sciences, and Education in Science. Articles should conform to one of the categories below:

Original Articles (in Portuguese or English): for communicating original research. Articles should follow the usual form of presentation, including the IMRAD structure (introduction, methodology, results, discussion, and conclusions) as appropriate for the work being submitted. They should have a maximum of 20 pages, including figures, tables, diagrams. All pages should be numbered following the template.

Review Articles (in Portuguese or English): for communicating progress in a specific field of Chemistry, Biology, Physics, Mathematics, Pharmacy, Medicine, Engineering, Agronomical sciences, and Education in Science, to provide a critical account of the state of the art from the point of view of the highly qualified and experienced specialist. They should have a maximum of 40 pages, including figures, tables, diagrams. All pages should be numbered following the template. Authors need to have publications in the field reviewed attesting their experience and qualification. Before submitting the manuscript, authors should send an e-mail to the editors with an abstract of the review and a letter explaining the relevance of the publication. The material will be examined by the editors and, once approved, authors will be requested to submit the full manuscript, according to PTQ guidelines.

Technical Notes (in Portuguese or English): for communicating methods, validation of methods, techniques, equipment, and accessories developed in the author's laboratory or according to the professional experience of the authors in checking some situations at the site. They should have a maximum of 25 pages, including figures, tables, and diagrams. All pages should be numbered following the template.

Interviews (in Portuguese or English): for communicating interviews linked to one of the subjects of the interest of Periódico Tchê Química. The interview should have a maximum of 20 questions or 15 pages. The person who is going to be interviewed does not necessarily need to be a researcher. It may be another person since the subject to be discussed shows relevance in the field of science. All pages should be numbered following the template.

Short Communications - Short Communications (in Portuguese or English): Short Communications are short papers that present original and significant material for rapid dissemination. For instance, Short Communication may focus on a particular aspect of a problem or a new finding that is expected to have a significant impact. Short articles include, but are not limited to the discovery or development of new materials, cutting-edge experiments, and theory, the novelty in simulation and modeling, elucidation of mechanisms. Short Communications are limited to 3000 words and are not subdivided. The paper should contain an abstract, main body, and references, and contain no more than 6 figures or tables, combined. The abstract is limited to 100 words.

Case Study - Case Study (in Portuguese or English): a case study research paper examines a person, place, event, phenomenon, or another type of subject of analysis to extrapolate key themes and results that help predict future trends, illuminate previously hidden issues that can be applied to practice, and/or provide a means for understanding an important research problem with greater clarity. A case study research paper usually examines a single subject of analysis, but case study papers can also be designed as a comparative investigation that shows relationships between two or more subjects. The methods used to study a case can rest within a quantitative, qualitative, or mixed-method investigative paradigm. A case study as a qualitative methodology is an exploration of a time- and space-bound phenomenon and requires much more from their authors who are acting as instruments within the inquiry process. In the case study methodology, a variety of methodological approaches may be employed to explain the complexity of the problem being studied. A case study research is defined as a qualitative approach in which the investigator explores a real-life, contemporary bounded system (a case) or multiple bound systems (cases) over time, through detailed, in-depth data collection involving multiple sources of information, and reports a case description and case themes. The unit of analysis in the case study might be multiple cases (a multisite study) or a single case (a within-site case study).

Clinical Trial - Clinical Trial (in Portuguese or English): clinical trials are research studies performed in people that are aimed at evaluating a medical, surgical, or behavioral intervention. They are the primary way that researchers find out if a new treatment, like a new drug or diet, or medical device (for example, a pacemaker) is safe and effective in people. Often a clinical trial is used to learn if a new treatment is more effective and/or has less harmful side effects than the standard treatment. Other clinical trials test ways to find a disease early, sometimes before there are symptoms. Still, others test ways to prevent a health problem. A clinical trial may also look at how to make life better for people living with a life-threatening disease or a chronic health problem. Clinical trials sometimes study the role of caregivers or support groups.

Cohort Studies - Cohort Studies (in Portuguese or English): in a cohort study, a group of individuals exposed to a putative risk factor and a group who are unexposed to the risk factor are followed over time (often years) to determine the occurrence of disease. The incidence of disease in the exposed group as compared with the incidence of disease in the unexposed group. The relative risk (incidence risk or incidence rate) is used to assess whether the exposure and disease are causally linked. Cohort studies may be prospective or retrospective. A prospective cohort study is also called a concurrent cohort study, where the subjects have been followed up for a period and the outcomes of interest are recorded. In a retrospective cohort study both the exposure and outcome have already occurred at the outset of the study. While this type of cohort study is less time consuming and costly than a prospective cohort study, it is more susceptible to the effects of bias. For example, the exposure may have occurred some years previously and adequate reliable data on exposure may be unavailable or incomplete. Besides, information on confounding variables may be unavailable, inadequate, or difficult to collect.