Technology: general issues 387 History of engineering and technology 262 TA Engineering (General). Civil engineering (General) 213 TJ Mechanical engineering and machinery 180 Materials science 169 TP Chemical technology 158 Research & information: general 145 human 118 Humans 105 chemistry 92 TK Electrical engineering. Electronics Nuclear engineering 91 Chemistry 89 surface property 78 QC Physics 77 Scanning electron microscopy 76 History of engineering & technology 67 Property 67 Article 66 Tensile strength 66 procedures 66 Physics 65 Compressive strength 61 Surface Properties 60 Research and information: general 58 Mechanical properties 57 QD Chemistry 57 Fourier transform infrared spectroscopy 54 Morphology 53 controlled study 53 Nanostructured materials 51