| 31. | The major difficulty in separation of actinium is the similarity of its properties with those of lanthanum.
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| 32. | Lanthanum hexaboride slowly evaporates from the heated cathodes and forms deposits on the Wehnelt cylinders and apertures.
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| 33. | These elements are vanadium, rubidium, indium, lanthanum, europium, rhenium, and lutetium.
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| 34. | It is the most common of the lanthanides, followed by neodymium, lanthanum, and praseodymium.
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| 35. | Its spectrum also shows other s-process elements such as barium, yttrium, and lanthanum.
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| 36. | The Lanthanum aqua ion is probably 9-coordinate, as are those of the lighter lanthanides.
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| 37. | Alternatively, it can be produced by hydration reaction ( addition of water ) to Lanthanum oxide.
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| 38. | Lanthanum is an essential cofactor for the methanol dehydrogenase of the methanotrophic bacterium " Methylacidiphilum fumariolicum"
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| 39. | This effect was caused by the regulation of the let-7a and microRNAs by the lanthanum ions.
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| 40. | The metals can be transition metals like scandium, yttrium as well as lanthanides like lanthanum and cerium.
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