Michael Preston has dubbed this form of riddle the chemical rebus (1982:117).[…]Meanwhile, down in the freshman chemistry office, scores of these same rebi are posted on a billboard for another purpose. Undergraduates use chemical rebi to play with recently acquired knowledge, sometimes to affirm a conceptual mastery which is exceedingly difficult.

The economic boom and the “speculative orgy” that pervaded the Roaring Twenties faded abruptly during late October 1929 with the stock market crash (sometimes called the “Great Crash”) that precipitated the rise of The Great Depression.

Negative control wells (12/96 per assay plate) contained cells treated with 1% DMSO (final concentration) and positive control wells (4/96 per assay plate) contained cells treated with the fungal toxin ophiobolin A (Sigma Aldrich) at 50 μM with 1% DMSO. Ophiobolin A is cytotoxic both to proliferating and quiescent GSCs. Relative ATP levels were measured 24 hours later using the CellTiter-Glo reagent (Promega) according to the manufacturer's instructions.

Immediately her issue of blood stanched.