中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (1S,2R)-2,6-dihydroxy-4-(2-hydroxy-1-methylpropyl)-3-methylbenzoic acid | 163660-01-3 | C12H16O5 | 240.256 |
—— | (+/-)-threo-2-(2-hydroxy-1-methylpropyl)-4,6-dimethoxybenzoate | 110087-15-5 | C15H22O5 | 282.337 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 5-sec-butyl-4-methyl-resorcinol | 91968-74-0 | C11H16O2 | 180.247 |
—— | (1S,2R)-2,6-dihydroxy-4-(2-hydroxy-1-methylpropyl)-3-methylbenzoic acid | 163660-01-3 | C12H16O5 | 240.256 |
—— | decarboxydihydrocitrinin | 907582-45-0 | C12H16O3 | 208.257 |
—— | 5-ethyl-4-methyl-resorcinol | 81633-93-4 | C9H12O2 | 152.193 |
This nursery rhyme is one of the oldest, most familiar, and shortest treatises on fracture mechanics in the literature. Nevertheless, it makes several important points: (1) fracture occurs in response to some driving force (for Humpty, a “great fall”), (2) fracture involves material separation, and (3) fracture is irreversible.