What do the abstract and appendix include in research?

Dear Ms. Salsabeel Al-Abed,

Nice to see your question.

As per your quesition, I would like to tell you that abstract contains some introdution about your reseasrch, methodology, results and conclusion, while appendix contains the compositon of Buffers/Solutions used in your research. Appendix should be place at the end of your thesis after references.

Thanking you

with regards