Zobrazeno 1 - 10
of 534
pro vyhledávání: '"LI ying-chun"'
Publikováno v:
Yankuang ceshi, Vol 41, Iss 1, Pp 145-152 (2022)
BACKGROUND At present, the content of Se in soil is mainly determined by atomic fluorescence spectrometry, which has disadvantages such as large usage of acid and relatively complex pretreatment. Determination of high content of Se requires high dilu
Externí odkaz:
https://doaj.org/article/88071316eba94687aed7c628f80746ad
Publikováno v:
Yankuang ceshi, Vol 39, Iss 6, Pp 878-885 (2020)
OBJECTIVES Ion-adsorption type rare earth ore is extremely important in China and rare in the world. It is China's dominant mineral resource. At present, all the rare earth elements in the existing REE reference materials are oxide minerals, not ion-
Externí odkaz:
https://doaj.org/article/d30f1579d2734baba2f0b7eabc40c3e3
Publikováno v:
Yankuang ceshi, Vol 39, Iss 6, Pp 828-838 (2020)
BACKGROUND At present, the major elements in silicate samples are generally determined by X-ray fluorescence spectrometry with fusion sample preparation. Not only can the single element determination results not exceed the limit, but also the percent
Externí odkaz:
https://doaj.org/article/d4c33be94dc94da0992c4f8fe76186d9
Publikováno v:
Yankuang ceshi, Vol 37, Iss 5, Pp 518-525 (2018)
BACKGROUND The accurate determination of ionic phase rare earths in ion-adsorption rare earths is of great significance for the evaluation of rare earth ore bodies. Ionic phase rare earths are adsorbed on clay minerals in the form of hydroxyl or hydr
Externí odkaz:
https://doaj.org/article/5d06845f040e44c18a7832d991f11293
Publikováno v:
Yankuang ceshi, Vol 37, Iss 3, Pp 298-305 (2018)
BACKGROUND The analysis of ore samples by X-ray Fluorescence Spectrometry (XRF) has the advantages of quantitative accuracy, less reagent and good reproducibility. However, due to the lack of rare earth standard materials at present, the accurate qua
Externí odkaz:
https://doaj.org/article/30de535720984797b5991fda2fc0d883
Publikováno v:
Yankuang ceshi, Vol 32, Iss 2, Pp 249-253 (2013)
Traditionally, the percentage sum method is used to check the data quality of total analysis of constituents for silicate rock. For samples with a high content of trace elements, the contents of major elements obtained by X-ray Fluorescence Spectrome
Externí odkaz:
https://doaj.org/article/621936f8d7d14b12abf68058c873d367
Publikováno v:
In Clinical Neurology and Neurosurgery November 2024 246
Publikováno v:
In Sensors and Actuators: B. Chemical 1 July 2024 410
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Autor:
Li Ying-Chun
Publikováno v:
BMC Public Health, Vol 10, Iss 1, p 603 (2010)
Abstract Background Older adults, who often have more than one chronic disease, are at greater risk of influenza and its complications. However, because they often see physicians for other more pressing complaints, their physicians, focusing on one c
Externí odkaz:
https://doaj.org/article/92df23e2b5914bf3b5f5bd964f66869d