Should the introduction or literature review be written in the present tense or past tense? However, do not make the Introduction too broad.
The paper should read as a narrative in which the author describes what was done and what results were obtained from that work.
Methodology and results: To talk about your methods or results, use the past simple or present perfect. A summary is a brief restatement of preceding text that is intended to orient a reader who has studied the preceding text.
The quantitative estimation of labelling, which represented the average number of gold particles per mm2, indicated the labelling over the nuclear NLBs to be twice as strong as that over the loosened chromatin, and four times as strong as that over the condensed chromatin Table 2.
All background information gathered from other sources must, of course, be appropriately cited.
In other experiments, segments were preincubated for 1 h in small petri dishes containing 1 mM IAA solution, and then raphanusanin B was added to the medium final concentrations 1 or 3 mM.