There are many guides that can help you in writing a scientific journal. This one guide may be a reference and for detail you can find here : essays online
Common formats for scientific journals usually consist of:
4. Materials and methods;
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Every scientific journal should have a clear title. Reading the title will make it easier for the reader to know the essence of the journal without having to read the entire journal. For example, the title “Biology Lab Report”. With titles like this, then no readers will read it because it does not describe the contents of the journal. Examples of clear titles, such as “Effect of Light and Temperature on Population Growth of Escherichia Coli Bacteria”. This title has been a bit much to report the contents of the journal.
The abstract is different from the summary. Abstract section in scientific journals serves to digest briefly the contents of the journal. The abstract here is intended to be an explanation without reference to the journal.
The abstract section should present about 250 words that summarize objectives, methods, results, and conclusions. Do not use abbreviations or abstracts. In the abstract should be able to stand alone without footnotes. This abstract is usually written last. An easy way to write an abstract is to quote the most important points in each section of the journal. Then use the points to construct a short description of your study.
Introduction is a statement of the case you are investigating, which informs the reader to understand your specific objectives within a larger theoretical framework. This section may also include background information on issues, such as a summary of any research that has been conducted and how an experiment will help to explain or expand knowledge in the general field. All background information collected from other sources should be a quote.
Note: Do not make the introduction too broad. Just remember that you write a journal for colleagues who also have the same knowledge as you.
4. Materials and Methods
This section describes when the experiment has been performed. The researcher explains experimental design, equipment, data collection methods, and control types. If the experiment is done in nature, then the author describes the research area, location, and also describes the work done. The general rule to keep in mind is that this section should describe in detail and clearly so that the reader has the basic knowledge and techniques to be duplicated.
Here the researcher presents concise data with reviews using narrative text, tables, or drawings. Remember only the results presented, there is no interpretation of data or conclusions from the data in this section. The data collected in the table / picture should be accompanied by a narrative text and presented in an easily understandable form. Do not repeat at length the data presented in tables and drawings.
In this section, researchers interpret data with observed patterns. Any relationships between experiment variables are important and any correlation between variables can be seen clearly. The researcher should include a different explanation of the hypothesis or outcome that is different or similar to any related experiments performed by other researchers. Remember that every experiment does not always have to show a big difference or a tendency to be important. Negative results also need to be explained and may be important to change in your research.
This section simply states that the researcher thinks about each data presented relating back to the question stated in the introduction. With reference to the introduction and conclusion, a reader should have a good idea of this research, even if only specific details.
All the information (quotations) that researchers get should be written alphabetically in this section. It is useful for readers who want to refer to the original literature. Note that the references cited are actually mentioned in your journal.