Since this is not my area of expertise, I searched Google under the key words "'Cutting DNA' ultrasound 'restriction enzymes'" to get these possible sources:
http://books.google.com/books?id=MPkwi-i33zYC&pg=PA134&lpg=PA134&dq=%22Cutting+DNA%22+ultrasound+%22restriction+enzymes%22&source=web&ots=19vwyKa7qL&sig=OL0nFbjDv10Yzj2lp3laRn2Kd5U&hl=en
http://www.answers.com/topic/genetic-engineering?cat=technology
http://bookweb.kinokuniya.co.jp/guest/cgi-bin/bookseaohb.cgi?ISBN=1405135441&AREA=05&LANG=E
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.
I hope this helps. Thanks for asking.
There are two methods used for cutting DNA into small pieces – this is via ultrasound and restriction enzymes. Which method is considered better and why?
1 answer