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Enigmatic morphological features of the formation and fate of “dark” (hyper-basophilic, hyper-argyrophilic and hyper-electrondense) neurons suggest that the mechanical work causing their dramatic shrinkage (whole-cell ultrastructural compaction) is done by a previously “unknown” ultrastructural component residing in the spaces between their “known” (i.e. visible in the conventional transmission electron microscopy) ultrastructural constituents. Embedment-free section electron microscopy revealed in these spaces the existence of a continuous network of gel microdomains, which is embedded in a continuous network of fluid-filled lacunae. We gathered experimental facts suggesting that this gel network is capable of a volume-reducing phase-transition (an established physico-chemical phenomenon), which could be the motor of the whole-cell ultrastructural compaction. The present paper revisits our relevant observations and speculates how such a continuous whole-cell gel network can do both whole-cell and compartmentalized mechanical work.

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. The resulting curve after background correction describes the processes occurring in this region, as shown in Fig. 5 for a heating rate of 10 °C min −1 . The normalised extent of conversion (α) was then found by numerical integration of the

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oxidation is carried out around 150 °C and 1–2 MPa pressure under homogeneous reaction conditions which result in the conversion of less than 6% and selectivity of cyclohexanol and cyclohexanone of around 80% using metal cobalt salt or metal-boric acid

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conversion and a single valued function of x , respectively. One of the important point of this equation is that it is not dependent on previous thermal history of the specimen under observation, so that if we get combined data of conversion and rate of

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Journal of Thermal Analysis and Calorimetry
Authors: José Geraldo de P. Espínola, Evandro P. S. Martins, Franklin P. Aguiar, Haryane R. M. Silva, M. G. Fonseca, L. N. H. Arakaki, and Ercules E. S. Teotônio

methods of analysis of thermo-gravimetric curves were used, which are based on the Coats–Redfern equation: model fixing [ 11 ], and iso-conversional methods. In general, the rate law of a decomposition reaction in the solid state is expressed as dα/dt = A

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Reaction Kinetics, Mechanisms and Catalysis
Authors: Saet Byul Kim, Mi Ran Lee, Eun Duck Park, Sang Min Lee, HyoKyu Lee, Ki Hyun Park, and Myung-June Park

density strongly influence the dissociation constant of water, which determines the availability of H + and OH − ions in HTW. This study considers the conversion of d -xylose to furfural and other side reactions in HTW without acid catalysts in

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, conversion-) dependent variations in the overall apparent activation energy during the curing of the epoxy-anhydride system as determined by model-free kinetic thermo-analytical methods. Two important phase transitions occur during curing, namely, gelation

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K −1 mol −1 ), T is the absolute temperature, and α is the conversion degree. The reaction rate dα/d t reaches its maximum value at a specific temperature ( T m ), which depends on the heating rate (β) and which can be determined by the

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