The ratio of deuterium to hydrogen in the formic acid, a key precursor to the chemicals that make up cell membranes, indicates that the acid had an extraterrestrial origin.
What does D/H stand for?
D/H stands for Deuterium to Hydrogen (ratio)
This definition appears frequently and is found in the following Acronym Finder categories:
- Science, medicine, engineering, etc.
See other definitions of D/H
We have 52 other meanings of D/H in our Acronym Attic
- Depression/Elevation (Angle)
- Depth of Field
- Dioxins and Furans
- Direction Finder
- Disposition Form
- Dust Free
- Dallas Fort Worth
- Diesel Generator
- Door Glass
- Double Glazing (glassmaking industry)
Samples in periodicals archive:
It is harder for the heavy form to escape gravity, so if lots of hydrogen from water left Venus, the ratio of deuterium to hydrogen left behind would rise.
In the May 18 SCIENCE, scientists reported that C/1999 S4 is the first comet whose ratio of deuterium to hydrogen is similar to that found in water on Earth.
From 1978 through 1980, Pioneer Venus recorded the ratio of deuterium to hydrogen in the planet's upper atmosphere.
Thus, the present ratio of deuterium to hydrogen should enable researchers to calculate the maximum amount of ordinary matter in the universe.
But researchers also know that the ratio of deuterium to hydrogen on Venus hasn't stayed the same throughout history, although on Earth the ratio has remained relatively constant.