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Both 0.01 mol dm-3 aHA and 0.001 mol dm-3 PIH at pH 9.7 had the ability to dissolve over 0.1 mmol dm-3 for the goethite layer bone fragments.A set of four symmetric, butterfly-shaped 4-(4-(decyloxy)phenyl)-2,6-di(thiophen-2-yl)pyridine (TPY) derivatives 2TPA-TPY (TPY center and triphenylamine end groups), 2CBZ-TPY (TPY center and N-ethyl carbazole end groups), 2TPY-TPA (triphenylamine center and TPY at the periphery) and 2TPY-CBZ (N-ethyl carbazole center and TPY at the periphery) was synthesi