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UNLABELLED Given a good correlation between onsets of crystallization and mobility above T(g), one might be able to predict crystallization onsets at a temperature of interest far below T(g) from this correlation and measurement of mobility at a temperature below T(g).
The effective crystallization activation energies decreased with increasing Na2O levels, and this was evidently an important factor affecting the initial crystallization temperature.
Results point out a maximum rate for a crystallization temperature of 131 degrees C and probably an underestimated nucleation constant.
The advantages of temperature as a crystallization parameter are constant composition, ease of control and monitoring and reversibility.
Because practical protein crystallization is always performed in an environment with slight temperature variations, the sensitivity of protein crystallization to temperature may provide an explanation for the poor reproducibility of protein crystallization.
It is shown that, unlike low-temperature crystallization, high-temperature crystallization proceeds under nonequilibrium conditions, which complicates consideration of related problems.

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Which compounds are obtained in crystallization?10 answersCrystallization processes yield a diverse array of compounds across various research and industrial applications, as demonstrated by the contexts provided. From the formation of single crystals for structural determination of unknown molecules, to the crystallization of furanic compounds from sugars, and the preparation of hydrochlorides, hydrobromides, or hydroiodides of pharmaceutical compounds, the range of compounds obtained through crystallization is broad. Additionally, the crystal structures of several bicyclo[2.2.1]hept-2-ene derivatives have been determined, showcasing the versatility of crystallization in obtaining compounds with complex structures. Steroidal substances can also be crystallized to achieve a predeterminable and homogenous particle size class, further illustrating the method's utility in producing pharmaceutical active principles. The technique finds extensive application in the pharmaceutical industry for isolating pure active pharmaceutical ingredients (APIs), co-crystals, and for the separation of chiral isomers. Moreover, the 5-nitrosalicylate ester of 2-acetamidophenylboronic acid is another compound obtained under crystallization conditions, highlighting the method's role in facilitating chemical reactions and bond formations. The controlled crystallization of enantiomers of a cyclic phosphoric acid derivative on templated micro-patterned functionalised surfaces, and the isolation of chiral crystals composed of one of the axially chiral enantiomers from a solution of two-substituted ether- and imide-bridged biphenyl compounds, demonstrate the precision with which crystallization can be used to obtain specific enantiomers. Lastly, the general mention of the crystallization of organic compoundsunderscores the widespread applicability of crystallization in obtaining a vast array of compounds for various scientific and industrial purposes.
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