TP Chemical technology 55 QD Chemistry 26 Q Science (General) 13 T Technology (General) 10 RA0421 Public health. Hygiene. Preventive Medicine 7 TA Engineering (General). Civil engineering (General) 7 TK Electrical engineering. Electronics Nuclear engineering 7 Q Science 6 RS1-441 Pharmacy and materia medica 6 QH Natural history 5 R Medicine (General) 5 TJ Mechanical engineering and machinery 4 Antibacterial agents 3 Fruit and fruit culture 3 QH1 Natural history (General - Including nature conservation, geographical distribution) 3 TX341-641 Nutrition. Foods and food supply 3 Antioxidants 2 Botanical chemistry. Phytochemicals 2 Extraction (Chemistry) 2 HD28-70 Management. Industrial Management 2 Individual drugs and other agents 2 Medical botany (General) 2 Microbial ecology 2 QC Physics 2 QK Botany 2 QR Microbiology 2 R735-854 Medical education. Medical schools. Research 2 RA Public aspects of medicine 2 RK1-715 Dentistry 2 SB Plant culture 2