human 127 Humans 103 Article 102 concentration (composition) 90 controlled study 84 chemical composition 67 nonhuman 63 Scanning electron microscopy 56 chemistry 50 resin 50 female 49 male 49 Composite Resins 48 procedures 45 Composite materials 40 Tensile strength 39 adult 39 Male 37 Ecosystems 35 Reinforcement 35 unclassified drug 35 body composition 33 Female 32 Mechanical properties 32 Fibers 31 Forestry 31 Fourier transform infrared spectroscopy 31 Chemical compositions 29 Biodiversity 28 metabolism 28