Table 1 Developed/modified dictionaries used for recognition of general English words, general chemical science terms and tokens with special meaning
Dictionary/Usage for | Description | Reference | Examples |
|---|---|---|---|
General chemical science terms Selection of general terms (chemical and from related fields of physics, mathematics …) | ~7500 General scientific terms in chemistry, physics and mathematics IUPAC Compendium is used | IUPAC Compendium of Chemical Terminology (Gold Book) | Naphthenes, solvation energy, osmotic pressure, reaction dynamics … |
General English words dictionary Selection of general English words | ~58,000 general English words. It is based on Corncob Lowercase Dictionary modified by us for stated goals. 566 words were excluded, which are often used in scientific terminology | The modified by us the Corncob- Lowercase list of more than 57,000 English words http://ru.scribd.com/doc/147594864/ Corncob-Lowercase (see Additional file 3 for excluded words) | Abbreviate, academic, accelerate … Excluded Abrasion, absorption, aerosol … |
Stop list Filtering tokens which are not part of terms in any way | ~2060 tokens. List contains the words, abbreviations and so on, which cannot be incorporated into any term-like phrases | Proprietary design (see Additional file 4) | e.g., de, ca., fig., al., co-exist, et, etc., i.e., ltd … |
Stable isotopes Filtering n-grams containing digits | ~250 isotopes. It is based on The Berkeley Laboratory Isotopes Project’s isotopes database | Proprietary design, based on The Berkeley Laboratory Isotopes Project’s DB. http://ie.lbl.gov/education/isotopes.htm (see Additional file 5) | 1H, 2H, 3He, 4He, 6Li, 7Li … |
Chemical elements signs Filtering n-grams containing digits | ~126 chemical elements. It is based on Periodic table | Proprietary design, based on periodic table (see Additional file 6) | H, He, Li, Be, B, C, N, O, F … |
Measurement units Filtering n-grams containing units of measure | ~100 records now. It is partially based on IUPAC GoldBook | Proprietary design, partially based on http://goldbook.iupac.org/ (see Additional file 7) | (a.u.), (ev), a.u, °C, ppm, kV, mol, g−1, ml−1, gcat, gcat h … |