| Share | Phrase |
| 67.72% | molecular [structure] weight |
| 3.66% | molecular [structure] sieve |
| 2.76% | molecular [structure] distribution |
| 2.24% | molecular [structure] polymer |
| 1.95% | molecular [structure] fraction |
| 1.79% | molecular [structure] copolymer |
| 1.60% | molecular [structure] structure |
| 1.43% | molecular [structure] agent |
| 1.32% | molecular [structure] means |
| 0.97% | molecular [structure] range |
| 0.89% | molecular [structure] component |
| 0.86% | molecular [structure] material |
| 0.85% | molecular [structure] sensor |
| 0.84% | molecular [structure] hydrogen |
| 0.74% | molecular [structure] constituent |
| 0.66% | molecular [structure] information |
| 0.59% | molecular [structure] control |
| 0.48% | molecular [structure] oxidant |
| 0.46% | molecular [structure] bond |
| 0.46% | molecular [structure] oxygen |
| 0.43% | molecular [structure] terminal |
| 0.42% | molecular [structure] nitrogen |
| 0.39% | high molecular |
| 0.38% | molecular [structure] end |
| 0.37% | molecular [structure] species |
| 0.31% | low molecular |
| 0.30% | molecular [structure] compound |
| 0.30% | molecular [structure] hydrocarbon |
| 0.29% | molecular [structure] paraffin |
| 0.28% | molecular [structure] ep |
| 0.28% | molecular [structure] pib |
| 0.28% | molecular [structure] succinimide |
| 0.25% | molecular [structure] constitution |
| 0.23% | molecular [structure] acid |
| 0.23% | molecular [structure] mn |
| 0.22% | molecular [structure] segment |
| 0.20% | molecular [structure] mono |
| 0.20% | molecular [structure] variation |
| 0.17% | molecular [structure] spacer |
| 0.17% | molecular [structure] density |
| 0.17% | molecular [structure] fragment |
| 0.17% | molecular [structure] grade |
| 0.17% | molecular [structure] peak |
| 0.17% | molecular [structure] polyisobutene |
| 0.17% | molecular [structure] polyisobutenes |
| 0.17% | molecular [structure] regulator |
| 0.17% | molecular [structure] group |
| 0.16% | molecular [structure] flow |
| 0.16% | molecular [structure] gas |
| 0.14% | molecular [structure] size |
| 0.13% | molecular [structure] formula |