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oxygen    音标拼音: ['ɑksədʒən] ['ɑksɪdʒən]
n. U氧,氧气

U氧,氧气

oxygen
O


oxygen
O *

oxygen
n 1: a nonmetallic bivalent element that is normally a colorless
odorless tasteless nonflammable diatomic gas; constitutes
21 percent of the atmosphere by volume; the most abundant
element in the earth's crust [synonym: {oxygen}, {O}, {atomic
number 8}]

Oxygen \Ox"y*gen\, n. [F. oxyg[`e]ne, from Gr. 'oxy`s sharp,
acid root of gi`gnesqai to be born. So called because
originally supposed to be an essential part of every acid.]
[1913 Webster]
1. (Chem.) A colorless, tasteless, odorless, gaseous element
of atomic number 8, occurring in the free state in the
atmosphere, of which it forms about 23 per cent by weight
and about 21 per cent by volume, being slightly heavier
than nitrogen. Symbol O. Atomic weight 15.9994.
[1913 Webster PJC]

Note: It occurs combined in immense quantities, forming eight
ninths by weight of water, and probably one half by
weight of the entire solid crust of the globe, being an
ingredient of silica, the silicates, sulphates,
carbonates, nitrates, etc. Oxygen combines with all
elements (except fluorine), forming oxides, bases,
oxyacid anhydrides, etc., the process in general being
called oxidation, of which combustion is only an
intense modification. At ordinary temperatures with
most substances it is moderately active, but at higher
temperatures it is one of the most violent and powerful
chemical agents known. It is indispensable in
respiration, and in general is the most universally
active and efficient element. It may be prepared in the
pure state by heating potassium chlorate.
[1913 Webster] This element (called dephlogisticated
air by Priestley) was named oxygen by Lavoisier because
he supposed it to be a constituent of all acids. This
is not so in the case of a very few acids (as
hydrochloric, hydrobromic, hydric sulphide, etc.), but
these do contain elements analogous to oxygen in
property and action. Moreover, the fact that most
elements approach the nearer to acid qualities in
proportion as they are combined with more oxygen, shows
the great accuracy and breadth of Lavoisier's
conception of its nature.
[1913 Webster]

2. Chlorine used in bleaching. [Manufacturing name]
[1913 Webster]

31 Moby Thesaurus words for "oxygen":
acetylene, ammonia, argon, asphyxiating gas, butane,
carbon dioxide, carbon monoxide, chlorine, coal gas, ethane, ether,
ethylene, fluorine, formaldehyde, helium, hydrogen,
illuminating gas, krypton, lewisite, marsh gas, methane,
mustard gas, natural gas, neon, nitrogen, ozone, poison gas,
propane, radon, sewer gas, xenon

oxygen
Symbol: O
Atomic number: 8
Atomic weight: 15.9994
A colourless, odourless gaseous element belonging to group 16 of the
periodic table. It is the most abundant element present in the earth's
crust. It also makes up 20.8% of the Earth's atmosphere. For industrial
purposes, it is separated from liquid air by fractional distillation. It
is used in high temperature welding, and in breathing. It commonly comes
in the form of Oxygen, but is found as Ozone in the upper atmosphere. It
was discovered by Priestley in 1774.


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  • Oxygen - World Health Organization (WHO)
    Oxygen (O 2) is a chemical element At standard temperature and pressure, two oxygen atoms bind together to form a colourless and odourless gas with a molecular mass of 32 atomic mass units (amu) Together with nitrogen and argon, oxygen is one of the three major constituents of Earth’s atmosphere, being present in 21% of air
  • Oxygen - World Health Organization (WHO)
    Oxygen is a life-saving essential medicine with no substitution Healthcare professionals use oxygen to treat respiratory illnesses like COVID-19 and pneumonia Oxygen is also essential for surgery and trauma Vulnerable groups like older people, pregnant women, young infants and newborns need oxygen therapy regularly Despite being an essential medicine, oxygen is a complex product Medicinal
  • Oxygen Access Scale Up - World Health Organization (WHO)
    Medical oxygen is a life-saving medicine that is used to treat many conditions throughout the care continuum Despite the clinical importance of medical oxygen and inclusion on the WHO Essential Medicines List, it remains a hard to access resource in health care settings The COVID-19 pandemic highlighted inequities in availability and access to this life-saving medicine and the inherent
  • Try this if youre getting stuck in a mod update restart loop . . . - Reddit
    Save the file, launch Oxygen Not Included, and get on with your game I have not noticed any issues when I did this to fix restart problems with mods that were getting stuck (Mosaic Tile, Geyser Calculated Average Output Tooltip, and Happy digging: Dwarf Edition were today's culprits for me) Archived post
  • Oxygen therapy for children - World Health Organization (WHO)
    Oxygen therapy is essential to counter hypoxaemia and many a times is the difference between life and death This manual focuses on the availability and clinical use of oxygen therapy in children in health facilities by providing the practical aspects for health workers, biomedical engineers, and administrators
  • Webinar: The crucial role of oxygen in global health
    WHO is hosting a webinar highlighting oxygen's crucial role in global health WHO welcomes all to attend, including global health professionals, healthcare professionals, public health advocates, policymakers, and other persons interested in medical oxygen scale-up and sustaining oxygen ecosystems
  • The life-saving power of medical oxygen
    Oxygen is an essential medicine used to care for patients at all levels of the healthcare system, including in surgery, trauma, heart failure, asthma, pneumonia and maternal and child care Pneumonia alone accounts for 800 000 deaths per year It is estimated that 20–40% of these deaths could be prevented with the availability of oxygen therapy
  • Oxygen Not Included - Reddit
    Community for the space-colony simulation game Oxygen Not Included, developed by Klei
  • Health products policy and standards
    Different industries, including health systems, use oxygen in regular basis Oxygen in the market is available for industrial and medical use
  • National medical oxygen scale-up plan: Development guidance
    In line with WHA resolution 76 3 Increasing access to medical oxygen, WHO, Member States and partners, co-developed a guidance to strengthen the medical oxygen ecosystem This guidance is intended to support with the development of an actionable plan for medical oxygen scale up, which should follow a clear methodology and elements for continuous monitoring and evaluating It consists in six





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