61.9 MB (1.9 MB compressed)
5200 x 4160 pixels
43.9 x 35.3 cm ⏐ 17.3 x 13.9 in (300dpi)
TIM VERNON / SCIENCE PHOTO LIBRARY TIM VERNON / SCIENCE PHOTO LIBRARY
Drug delivery microbubbles. Computer illustration of a microbubble (blue) being stimulated by ultrasound waves (blue) to release a targeted drug inside a blood vessel (bottom) to affect tumour cells (red, upper right). Microbubbles are miniature bubbles smaller than one hundredth of a millimetre in diameter, but larger than one micrometre. They have numerous applications in science and medicine. They may be used for drug delivery, biofilm removal, membrane cleaning/biofilm control and water/waste water treatment purposes. They are also used in medical diagnostics as a contrast agent for ultrasound imaging. Because gas bubbles are unstable in liquid and would quickly dissolve, microbubbles must be coated with a solid shell. This shell is usually made from either a lipid or a protein.
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