Fulcanelli
Banned
- Joined
- Dec 11, 2009
- Messages
- 3,576
Fulcanelli,
I showed the electropherogram to the woman who teaches forensic chemistry at our university (We are both PhD's). She is Austrian and has almost no knowledge of this case, so she has no cultural or case-related biases of which I am aware. She immediately identified the squiggles as noise.
Take a close look at the Figure again, and notice how the squiggles are larger in the third row than the the others. The peaks are lower in S/N in this row, and more gain (amplification) is necessary to see them. Note that the Y-axis is smaller in row 3. When you amplify the signal, you also amplify the noise.
All DNA electropherograms have some noise. And so do all forms of spectroscopy, to the best of my knowledge. The spectroscopic experiment my student and I will do tonight, we will perform 10,000 times to achieve an acceptable signal-to-noise ratio. Fortunately, we will go to our respective homes while the machine in question gathers the data for us.
Chris
I refer you to my previous post on this matter. There is no noise in between peaks and the only peaks present are identical matches for Meredith. The validity of the knife DNA has been proven in a COURT OF LAW, not once, but twice, and I shall also point out all experts I have spoken to on it (including a professor of micro biology and another PhD scientist who specialises in producing kits for DNA testing) agree. It is also agreed upon by the independent experts representing the victims.
Stop beating the hoarse, it's dead already.