Doubly labeled water

Doubly labeled water is water in which both the hydrogen and the oxygen have been partly or completely replaced for tracing purposes (i.e. labeled) with an uncommon isotope of these elements.

In practice, for both practical and safety reasons, almost all recent applications of the "doubly labeled water" method use water labeled with the heavy, non-radioactive forms of the elements deuterium and oxygen-18 (O-18 or O), or deuterium oxide-18 (D₂O). In theory, radioactive forms of hydrogen and oxygen could be used for such labeling, and this was the case in many early applications of the method.

单词	Doubly labeled water
释义	Doubly labeled water 英语百科 Doubly labeled water Doubly labeled water is water in which both the hydrogen and the oxygen have been partly or completely replaced for tracing purposes (i.e. labeled) with an uncommon isotope of these elements. In practice, for both practical and safety reasons, almost all recent applications of the "doubly labeled water" method use water labeled with the heavy, non-radioactive forms of the elements deuterium and oxygen-18 (O-18 or O), or deuterium oxide-18 (D₂O). In theory, radioactive forms of hydrogen and oxygen could be used for such labeling, and this was the case in many early applications of the method.
随便看	retaining ring for shaft shoulder的意思 retaining ring for tyre的意思 retaining ring fracture的意思 retaining ring groove的意思 retaining ring lip的意思 retaining ring moving的意思 retaining ring of tire的意思 retain的意思 retaining scre的意思 retaining screen的意思 retaining screw的意思 retaining seal的意思 retaining shield的意思 retaining snap ring的意思 retaining spring的意思 retaining spring, retaining spring的意思 Retaining structure的意思 Retaining Structures的意思 retaining suture fixator的意思 retaining the needle的意思 retaining time的意思 retaining time of control process的意思 retaining valve的意思 retaining valve release的意思 retaining variety的意思