Hi! Yes I will check your grammar.
1. In the first sentence I would start by saying.. the purpose of this research is to study the extract... instead of "this research studies"
2. In the third line i would say the objective is... instead of which objective
3. In the forth line, no period after oil
4. In line 5, ethanol extraction 95% have studied the extraction period. Try to find a different way to say this because I'm not sure what you are trying to say
5. Line 5, say Day 1, 3, 5 and 7 found that...
6. Line 10, ...studied in two cases and was extracted with and without heat.
7. Line 12, ... 7 days, it was found that...
8. Second paragraph you need to capitalize words after a period
9. Line 7 of paragraph 2, To give the color darker,... finish the sentence or reword it so that that sentence is complete
10. Last paragraph you need a period after nutans
Let me know if you have any other questions! Hope you are doing well!