Nanotechnology:

As we all know that ketu is the karaka of micro organisms or micro\ nano particles or things . so when 5th lord or 9th lord , if well placed with ketu and its dispositor if well placed ,makes  native interested for micro organisms or nano particles .

Here is the chart of a native who is into the field of research of nanotechnology . here as we can see, that 4th lord saturn with ketu in 5th house , and its dispositor is well placed(  jupiter sitting 10th from fifth house). And this combination of saturn ketu  placed 9th house from arudha lagna.

Also Read: A story of a Gambler.

P.s:  since it is saturn ketu which has taken the native  to the field of nano particles / technology.

If it was jupiter ketu , then the native would have gone in the field of research on the subject of micro organisms.