ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] Nitrogen, hydrogen, a 1: 5 mixture of nitrogen and hydrogen, and ammonia were allowed, in turn, to be adsorbed on the clean tungsten tip of a field-emission microscope, while pressure was increased gradually from 10-9 to 10~7 mm. mercury and then decreased by evacuation. After evacuation was begun, ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/190530a0