The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 320
... nitrogen has to some extent replaced conventional mechanical refrigerators for preserving food during shipment . The liquid nitrogen refrigeration system is simple and without moving parts . The storage tank is filled with liquid ...
... nitrogen has to some extent replaced conventional mechanical refrigerators for preserving food during shipment . The liquid nitrogen refrigeration system is simple and without moving parts . The storage tank is filled with liquid ...
Page 503
... nitrogen - 14 , the dominant isotope of nitrogen . Because nitrogen is quite common and is always present in natural situations in which carbon - 14 is disintegrating , nitrogen - 14 produced by decay is immediately mixed in with ...
... nitrogen - 14 , the dominant isotope of nitrogen . Because nitrogen is quite common and is always present in natural situations in which carbon - 14 is disintegrating , nitrogen - 14 produced by decay is immediately mixed in with ...
Page 693
... nitrogen in the form of urea nitrogen , nonprotein nitrogen , amino acid nitrogen , and ammonia . Minerals are MULTIPHASIC HEALTH SCREENING tested to find out whether the concentration is high , low , It has been an accepted tenet of ...
... nitrogen in the form of urea nitrogen , nonprotein nitrogen , amino acid nitrogen , and ammonia . Minerals are MULTIPHASIC HEALTH SCREENING tested to find out whether the concentration is high , low , It has been an accepted tenet of ...
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activity American animals appear areas authority become body called cause cells central century charge common complex conservation consists constant constitution consumer contain continental continued copper cosmic rays countries court crime criminal Crusade direct early effect electron elements energy England established Europe evidence example exist fact field force ground groups House important increase individual industrial involved Italy known land later less letters limited living major material means measure ment metal natural occur organic original particles particular party percent period person play political population position present problems protection reefs region remains result rule social South species structure theory tion United usually various