{According to|Based on|In accordance with|In line with|As outlined by} the {conventional|standard|traditional} phase diagrams, aqueous {solutions|options} freeze {at the|in the} liquidus and are frozen/solid {below|beneath|under} the eutectic solidus. Herein, {using|utilizing|making use of|employing|working with|applying} differential scanning calorimetry (DSC) and optical cryo-microscopy (OC-M), we demonstrate that hy-poeutectic, eutectic 40 wt% (NH4)2SO4 and hypereutectic (NH4)2SO4/H2O {remain|stay} liquid {well|nicely|effectively|properly} {below|beneath|under} the eutectic solidus {before|prior to|just before|ahead of} freezing in {three|3} {steps|actions|measures|methods}: fast-slow-fast. {The first|The very first|The initial} {fast|quick|quickly|rapidly|rapid|speedy} freezing produces a ramified ice microstructure (IM) and freeze-concentrated {solution|answer|remedy|resolution|option} (FCS) containing {up to|as much as} ~70 wt% (NH4)2SO4. As temperature decreases {further|additional}, the slow freezing of FCS precedes its {fast|quick|quickly|rapidly|rapid|speedy} freezing, which produces a striped IM and (NH4)2SO4 microcrystals. Videos recorded upon warming of frozen (NH4)2SO4/H2O reveal {a new|a brand new} three-phase reaction, {which is|that is|which can be} the recrystallization of ice and (NH4)2SO4 microcrystals {into the|in to the} lamellar eutectic ice-(NH4)2SO4 superlattice. This {work|function|perform|operate} demonstrates limitations {of the|from the|in the|on the|with the|of your} (NH4)2SO4/H2O phase diagram and pro-poses {an effective|an efficient} {strategy|technique|method|approach|tactic} for studying other deeply supercooled {solutions|options} whose behavior {is not|isn’t|just isn’t|is just not|will not be} predicted by the phase dia-gram. 2-Bromo-3-methylbenzo[b]thiophene custom synthesis 916304-19-3 structure PMID:23996047
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