In-situ crystallization

In dealing with clay minerals and related silicate species, the following criteria will be used, admittedly in an arbitrary manner. The crystallization in situ of new phases will be considered on the average... 

Crystallization In situ FTIR Mettler Toledo, ReactIR... 

The writer has also been impressed by the repeated occurrence of fine uraninite within thucholite bodies as illustrated on Plate 23 of Schidlowski (1970). These small crystals of uraninite give the impression of having crystallized in situ before the remains of the organism became compacted. It thus seems probable that this fine uraninite was trapped either during the life, or no later than very soon after the death, of the organisms. Certainly detrital minerals, including uraninite, are present, but a large part of the uranium appears to have been extracted from solution. 

Process in which the zeolite is crystallized in situ in a natural clay-derived matrix. 

The shape of the solid-state proton NMR free induction decay (FID) of a molten polyethylene (PE) sample has been examined as a function of time during isothermal crystallization in situ The crystallization rate as a function of crystallization temperature is derived and the results discussed within a thermodynamic framework. 

A technique for growing crystals in situ in a diffractometer enabling the X-ray structural determination of compounds that readily loose solvent upon harvesting is described. 

A similar procedure was developed to grow ZSM-5 crystals in situ on a molybdenum support [245]. The high thermal conductivity (138 W mK 1) and the high mechanical stability at elevated temperatures of the molybdenum support allow the application of ZSM-5 coatings in microreactors for high temperature processes involving large heat effects. The effect of the composition of the synthesis mixture on... 

The real-time in situ synchrotron PXRD technique found its next application in the mechanistic study of mechanochemically promoted co-crystallization of carbamazepine and nicotinamide as representatives of active pharmaceutical ingredients (API) [62], In the case of carbamazepine saccharin co-crystal, in situ analysis confirmed previous studies by cryomiUing that neat grinding led to amorphization while LAG synthesis rapidly produced the co-crystal. The other investigated system involved two-step neat grinding synthesis of nicotinamide suberic acid 2 1 co-crystal. The ex situ PXRD analysis had revealed a stepwise mechanism with the 1 1 cocrystal as the intermediate. Whereas LAG synthesis was too fast for ex situ approach, in situ monitoring enabled the discovery of an unknown phase that preceded the rapid formation of the 1 1 intermediate (Fig. 1.28). However, the authors were not successful at full characterization of the new phase due to its pronounced instability. 

This low-isotactic polypropylene sample shows a low crystallization rate at room temperature, which allows one to follow the crystallization in situ (Figure 9.21). The initially formed lamellar... 

The linear relation of electric permittivity parallel to the chain direction vs. polymer content thus established can be used for the control of the polymer content of prepolymerized samples as well as for the derivation of time-conversion curves of individual single crystals in situ. We have used this technique to study the sohd state polymerization of topospecifically and fully deuterated TS. 

A further interesting method of ISPR that has received quite some attention for reductions is the use of ISPR with crystallization (in situ product crystallization... 

As an alternative to native protein crystals, protein crystals cross-linked by glutaraldehyde provide attractive solid reaction vessels for preparing novel nanomaterial-in-crystal hybrids with potential application in catalysis. Au nanoparticles were S5mthesized within the solvent channels of cross-linked lysoz5mie crystals in situ without the introduction of extra chemical reagents or physical treatments (Liang et al., 2013). 

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