Revise your entire reflection paper, including your introduction paragraph, once you have completed writing the paper. Analyze what you have written and determine if the body and the conclusion of the paper match your thesis statement and follow logically from the information you presented in the introduction. If it doesn't, either re-tool the body of the paper or edit your introduction to match the rest of the paper. Re-read through the entire paper carefully to catch any spelling or grammar errors. If you're using a word processing software on a computer, use the spell-check function to help you catch any misspellings.
You may want to identify certain types of equipment by vendor name and brand or category (., ultracentrifuge vs. prep centrifuge), particularly if they are not commonly found in most labs. It is appropriate to report, parenthetically, the source (vendor) and catalog number for reagents used, ., " ....poly-L-lysine (Sigma #1309) ." When using a method described in another published source, you can save time and words by providing the relevant citation to the source. Always make sure to describe any modifications you have made of a standard or published method.