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Apr 24, 2024 · Parts-per-billion Trace Element Detection in Anhydrous Minerals by Micro-scale Quantitative NMR. Yunhua Fu, Renbiao Tao, +5 authors. Thomas Meier. Published 24 April 2024. Geology, Chemistry, Physics. Nominally anhydrous minerals (NAMs) composing Earth's and planetary rocks incorporate microscopic amounts of volatiles.
Apr 25, 2024 · Parts-per-billion Trace Element Detection in Anhydrous Minerals by Micro-scale Quantitative NMR Yunhua Fu,1,2 Renbiao Tao,2, ∗Lifei Zhang,1 Shijie Li,3 Yanan Yang,4 Dehan Shen,3 Zilong Wang,1 and Thomas Meier5,2, † 1School of Earth and Space Sciences, Peking University, Beijing, China
Apr 24, 2024 · Parts-per-billion Trace Element Detection in Anhydrous Minerals by Micro-scale Quantitative NMR. Nominally anhydrous minerals (NAMs) composing Earth's and planetary rocks incorporate microscopic amounts of volatiles. However, volatile distribution in NAMs and their effect on physical properties of rocks remain controversial. Thus, constraining ...
May 5, 2024 · The mole fraction is expressed as nmol mol-1, abbreviated “ppb” (for parts per billion; 1 ppb indicates that one out of every billion molecules in an air sample is CH 4). In the figures, the red lines and circles are globally averaged monthly mean values centered on the middle of each month.
Apr 30, 2024 · Cleveland’s has 72 parts per billion of ground-level ozone during the ozone season, the EPA requires 70 parts per billion. Cleveland is the final remaining ozone non-attainment area in Ohio, according to John Mooney, division director for Air and Radiation Division of Region 5, U.S. EPA Chicago.
May 3, 2024 · In all six homes, the NO 2 concentration in the bedroom quickly exceeded the WHO’s chronic exposure guideline of about five parts per billion by volume. And in three of the bedrooms, the levels ...
May 3, 2024 · A FeNO level lower than 20 parts per billion (ppb) indicates less likely to have benefits if the dose of ICS therapy is increased in children with asthma symptoms . A FeNO level higher than 35 ppb indicates the likelihood of relapse following withdrawal of ICS therapy in asymptomatic patients with stable asthma [ 50 ].
