题目内容
InthecaseofsalmonvaccineswithPLGAnanoparticles,thePLGAnanoparticlescanenhancetheimmuneresponseofthesalmonvaccines&thusprotectthefishbetter.Buttheeffectsofthenanoparticlesonthefishmeatquality&safetyareunknown.Theenvironmentaleffectsareunknown.Theconsumersknowthiswhenthefishissold.
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Nanomaterials(nanoparticles)arematerialsorparticleswithanyexternaldimensioninthenanometerscale(from1nmto100nm)orhavinginternalorsurfacestructuresinthenanometerscale.
Nanoparticlesthatarenaturallyoccurring(e.g.volcanicashorsootfromforestfires)oraretheincidentalbyproductsofcombustionprocesses(e.g.welding,dieselengines)areusuallyphysicallyandchemicallyheterogeneous,andareoftentermedultrafineparticles.
Engineerednanomaterialsareartificiallyproduced,anddesignedwithveryspecificpropertiesrelatedtotheirshape,size,surface,andchemistry.
Unbound engineered nanoparticles (UNP) are engineered nanomaterials that, under normal temperature and pressure conditions, are not contained within a matrix that would reasonably be expected to prevent the particles from being separately mobile and a potential source of exposure.
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