By Dr. Lynn Margulis (auth.), Dr. Lynn Margulis (eds.)
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That optical depth is less than three times 1cr 2 • In other words, if there is this much acetaldehyde in the martian atmosphere, the photo dissociating photons get to the very surface. The conclusion is even stronger for formaldehyde. What is the first order lifetime of any molecule in seconds? It is one over the flux in photons per square centimeter per second times the cross-section in square centimeters. At wavelengths around 3000 A the photon flux is several per cent of the total photon flux at Mars.
HUBBARD: Yes. As I said, there could be traces of other gases present. ORGEL: But more or less it adds up. HUBBARD: Yes. SOFFEN: What is the transmissibility of the Vycor to the irradiation? HUBBARD: We haven't measured it. SOFFEN: It may be cutting off? HUBBARD: Yes. SAGAN: At these wavelengths you would use quartz - because Vycor does not transmit light. SOFFEN: But when you increase amounts of Vycor, do you maintain the same cross-section? Do you fill the vessel more, or have a larger area? HUBBARD: When we add greater amounts of Vycor to the vessel we expose more surface area, but the increase is not proportional to the weight of substratum.
We will start by talking about amino acids - how you tell whether they came from where you think they came from, and how you identify them. That may be the wrong order. Maybe we should deal with identification first. Amino Acids PONNAMPERUMA: Let's discuss the amino acid questions that have been raised. MILLER: I'd like to try a gas as a specific example; namely, the cyanoacetylene which you got from the electric discharge. ORGEL: Well, that will come in et cetera. MILLER: Oh, that's an et cetera?
Chemistry and Radioastronomy by Dr. Lynn Margulis (auth.), Dr. Lynn Margulis (eds.)