Last Updated：2025/11/21
Sentence
研究者たちは新しい骨形成を追跡するために、質量数45の放射性カルシウム同位体の骨組織への取り込みを測定した。
Quizzes for review
Researchers measured the uptake of calcium-45 in bone tissue to track new bone formation.
See correct answer
Researchers measured the uptake of calcium-45 in bone tissue to track new bone formation.
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Related words
calcium-45
Noun
uncountable
(physics)
A
radioactive
isotope
of
calcium,
⁴⁵₂₀Ca,
having
twenty
protons
and
twenty-five
neutrons,
and
a
half-life
of
162.6
days;
it
is
used
as
a
tracer
in
studying
calcium
metabolism.
As
it
decays
it
undergoes
transformation
(nuclear
transmutation)
via
electron
emission,
also
called
negative
beta
decay
(β−-decay),
into
scandium.
Japanese Meaning
カルシウム-45：放射性カルシウム同位体で、20個の陽子と25個の中性子を持つ。半減期は162.6日であり、カルシウム代謝の研究におけるトレーサーとして利用され、崩壊時には電子放出（β⁻崩壊）を経てスカンジウムに変わる。
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