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- W3036541838 abstract "The Europium (III) and Terbium (III) complexes of diethylene-triaminepenta-acetate (DTPA) were prepared to be luminescent, histochemical analogues for the recently developed specific paramagnetic resonance contrast agents such as Gadolinium (III)DTPA. Electron probe microanalysis (energy dispersive X-ray spectroscopy) demonstrates that the Eu and Gd-DTPA colocalize in various tissues. Eu, Tb and Gd are closely related as seen in the Periodic Table (Fig. 1). The structures of Eu and Gd-DTPA (Fig. 2) as well as Tb-DTPA are very similar. Fig 3 shows the synthetic path of one of these compounds, Na 2 Eu (DTPA)H 2 O. Fig. 4 depicts a Europium(III) complex fluorescence-excitation scheme, where UV (360 - 440 nm) excites electron energy to the 5D 7 state, followed by a rapid (less than 5 μec) non-radioactive relaxation to the luminescent D0 state. There is a slow return to the ground 7 F manifold with emission from 575-790 nm. Crystals of the Europium complex exhibit intense, non-fading fluorescence (Fig. 5) in a narrow red band when observed with a UV excitation filter (360-440 nm), a midrange chromatic beam splitter (460 nm), and a long pass barrier filter (590 nm). The same crystal is seen in Differential Interference Contrast (DIC) light microscopy (LM) (Fig. 6)." @default.
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- W3036541838 date "1990-08-12" @default.
- W3036541838 modified "2023-09-26" @default.
- W3036541838 title "The luminescent probes europium and terbium-DTPA localize in cells and organs and serve as analogues for gadolinium-DTPA" @default.
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- W3036541838 doi "https://doi.org/10.1017/s0424820100161503" @default.
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