Subject: how does borax (sodium tetraborate) kill yeast?

I am doing a science fair project (going to the state science fair in a few weeks) and I need some help with research. I'm trying to find out why borax (sodium tetraborate) kills yeast on produce. I have information about how boric acid kills yeast (that it's the acid in it that kills the yeast), but it doesn't seem to apply to borax, since borax is a base and not an acid. I got the idea for my project from my food allergies. I am allergic to yeast, and the doctors told me to wash all produce in a borax solution to kill the yeast. I have done some web searches and have not had any success.

Thanks in advance for any help you might be able to give me!

Re: how does borax (sodium tetraborate) kill yeast?