<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">hypoxia</topic></authority><related type="other"><topic>anoxia</topic></related><related type="other"><topic>anoxemia</topic></related><related type="broader"><topic>physicochemical processes</topic></related><variant type="other"><topic>hypoxic</topic></variant><variant type="other"><topic>low oxygen</topic></variant><variant type="other"><topic>low-oxygen</topic></variant> <note xml:lang="en"><![CDATA[ The condition of low oxygen; it is typically defined as a level below 20.9% in an atmospheric environment and in the range between 1%-30% saturation in an aquatic environment. Hypoxic conditions are detrimental to living organisms. In a conservation context, hypoxia may be deliberately induced as a means of preservation of materials or pest control. For the extreme condition in which oxygen is below 0.1% or absent, use "anoxia." For a medical condition characterized by low blood oxygen, use "anoxemia," for which "hypoxemia" is a used for term. ]]></note></mads>