The air in your lab, the surface of the stopper, the needle itselfthey are all potential sources of contamination
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In a typical encapsulation experiment, PLGA nanoparticles exhibited a hydrodynamic diameter of 170 30 nm (z-average, PDI = 0.162) as measured using dynamic light scattering with anionic effective surface charge (20.5 5.3 mV) due to the terminal carboxylate groups on the PLGA polymers
Even experienced board certified cardiologists will argue over whether a single set of x-rays (they call them "chest rads") shows left atrium enlargement or not, and if so, its degree
Since their first report in 1990, SELEX technology has been continuously improved, 174,175 diversifying the selection and development of high-affinity aptamers
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