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The fraction from 24 to 36 min was collected (36 mL) in a round flask and evaporated down to approximately 1 mL by means of a rotary evaporator (40 °C, 750 mbar).
The mixture was gently heated on a hot plate after adding few boiling chips, and evaporated down to about 20 mL.
The mixture was then centrifuged and the supernatant evaporated down to the aqueous residue, which was partitioned between acetate buffer (0.1 M, pH 4.5) and diethylether.
When the evolution of H2 had ceased, sulfamoyl chloride (∼0.69 m in toluene,[ 19] ∼3–5 equiv, evaporated down to ∼1 mL prior to addition) was introduced in one portion.
The resultant supernatant was pooled with the first sample and evaporated down to the aqueous residue, to which methanol (70% in water) was added and left overnight at –20°C.
To a solution of 24 a (300 mg; 1.31 mmol) and 2,6-di tert-butyl-4-methylpyridine (270 mg, 1.31 mmol) in anhydrous DMF (20 mL) at 0 °C under N2 was added sulfamoyl chloride (∼0.69 m in toluene,[ 19] ∼3–5 equiv, evaporated down to ∼1 mL prior to addition).
Similar(49)
But what was clicking in the first half -- when they led by as many as 11 points -- started to evaporate down the stretch.
Evaporated, and rained down, and evaporated, and rained down.
The report also concludes that by early August, about 36 percent of the oil from the spill had naturally dispersed, evaporated or dissolved, down from 41 percent in the initial estimates.
This suggests that the isotope composition of spring waters results from a mixture of condensed rainfall and infiltrated evaporated rainfall down to the aquifer (the latter would be probably of minor proportion), which would emerge as springs.
As sales evaporated, factories were shut down.
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CEO of Professional Science Editing for Scientists @ prosciediting.com