Technology: general issues 89 History of engineering and technology 62 TP Chemical technology 50 Research & information: general 33 Materials science 26 Chemistry 23 TA Engineering (General). Civil engineering (General) 21 Research and information: general 19 Physics 16 Polymers 16 Article 14 History of engineering & technology 14 Scanning electron microscopy 14 polymer 14 chemistry 13 Biology, life sciences 12 Fourier transform infrared spectroscopy 12 TJ Mechanical engineering and machinery 10 X ray diffraction 10 Cellulose 9 QD Chemistry 9 Tensile strength 9 Property 8 TK Electrical engineering. Electronics Nuclear engineering 8 chemical structure 8 Chitosan 7 FTIR 7 Mechanical properties 7 Nanocomposites 7 Polymer chemistry 7