How we can use Blockchain to prevent Plagiarism in scientific papers? I have a research in "plagiarism prevention using blockchain" topic, and it is specialized in scientific papers. Anyone has any idea to help me through this topic?
"Blockchain" can't be made to prevent, or even detect plagiarism. The most useful thing related to your problem which the chain can help with, is it enables you to timestamp a document in order to prove that the document must have existed before a certain point in time. It can't tell you when the document was created or who the document was created by. It can only tell you who first pushed the document onto "Blockchain".

Assume author A publishes a document, by whatever medium, and person B receives the document. B checks "Blockchain" to see if the document has been published on it already, and if not, B publishes the document themselves, linked to an address which they have the private keys for.

Now B can go around pretending they created the document, and since A didn't pre-emptively publish the document onto "Blockchain", they are unable to use this tool to disprove B's copyright ownership. "Blockchain" actively prevents A from asserting their ownership this way because only B has the private keys.

So for such tool to ever have practical use, it would need to be absolutely ubiquitous in use, such that nobody would ever publish any document without first timestamping it onto "Blockchain" linked to their own private keys.

You also have the case of private key loss or theft, which would prevent an author being able to assert their ownership of the document using "Blockchain".