1. Also called: alkaline earth metal, alkaline earth element
any of the divalent electropositive metals beryllium, magnesium, calcium, strontium, barium, and radium, belonging to group 2A of the periodic table
2.
an oxide of one of the alkaline earth metals
alkaline earth in American English
noun
Chemistry
any of the oxides of barium, radium, strontium, calcium, and, sometimes, magnesium
Word origin
[1810–20]This word is first recorded in the period 1810–20. Other words that entered Englishat around the same time include: dominance, keyboard, liberalism, rationalize, realism
Examples of 'alkaline earth' in a sentence
alkaline earth
Doping with alkali metal or alkaline earth metal significantly enhanced the phosphorescence intensity.
Doory Kim, Han-Eol Kim, Chang-Hong Kim 2016, 'Effect of Composition and Impurities on the Phosphorescence of Green-Emitting AlkalineEarth Aluminate Phosphor', PLOS ONE10.1371/journal.pone.0145434. Retrieved from PLOS CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The anti-fungal activities of alkali and alkaline earth metal iodobenzoates were studied.
U.B. Eke, F.O. Nwosu, F.C. Adiatu 2005, 'Anti-fungal activities of m-iodobenzoic acid and some of its metal derivativeson bread mucor', Bulletin of the Chemical Society of Ethiopiahttp://www.ajol.info/index.php/bcse/article/view/21136. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Alkaline earth metal contents dominated those of alkali metals in 66.66% of samples.
Merlin Gountié Dedzo, Désiré Tsozué, Mumbfu Ernestine Mimba, Fulbert Teddy, RomioMofor Nembungwe, Sylvie Linida 2017, 'Importance of Rocks and Their Weathering Products on Groundwater Quality in Central-EastCameroon', Hydrologyhttp://www.mdpi.com/2306-5338/4/2/23. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
However, under natural conditions, alkaline earth metal ions usually co-exist.
Xiaolei Gao, Yaoqiang Hu, Tan Guo, Xiushen Ye, Quan Li, Min Guo, Haining Liu, ZhijianWu 2013, 'Comparative Study of the Competitive Adsorption of Mg, Ca and Sr Ions onto Resins',Adsorption Science & Technologyhttps://doi.org/10.1260/0263-6174.31.1.45. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Other alkaline earth metal complexes, including calcium and strontium complexes, were also considered.
Yuanyuan Li, Yuanyuan Li, Yuanyuan Li, Meijun Wu, Haohua Chen, Dongdong Xu, LingboQu, Jing Zhang, Ruopeng Bai, Yu Lan, Yu Lan 2019, 'Role of Alkaline-Earth Metal-Catalyst: A Theoretical Study of Pyridines Hydroboration',Frontiers in Chemistryhttps://www.frontiersin.org/article/10.3389/fchem.2019.00149/full. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Among the effects of liming, increased availabilities of alkaline and alkaline-earth cations are worth mention.
Ana Viadé, María Luisa Fernández-Marcos, Josefina Hernández-Nistal, Esperanza Alvarez 2011, 'Effect of particle size of limestone on Ca, Mg and K contents in soil and in swardplants Efeito do tamanho das partículas de calcário nos teores de Ca, Mg e K no soloe em plantas forrageiras', Scientia Agricolahttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000200010. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The sensors exhibit comparatively good selectivity with respect to alkaline, alkaline earth and some transition and heavy metal ions.
Yasser M. Abd EL-Karem, Salem M. Hamza, Salem M. Hamza, Nashwa M.H. Rizk, Samah S.Abbas 2009, 'Thiopental and Phenytoin as Novel Ionophores for Potentiometric Determination of Lead(II) Ions', Sensorshttp://www.mdpi.com/1424-8220/9/3/1860/. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Alkali borate glasses and alkaline earth borate glasses are commonly used materials in the field of optoelectronics.
Nedyalkova Miroslava, Hristov Hristo, Simeonov Vasil 2017, 'Statistical approach to study of lithium magnesium metaborate glasses', Open Chemistryhttp://www.degruyter.com/view/j/chem.2017.15.issue-1/chem-2017-0008/chem-2017-0008.xml?format=INT. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)