Structural changes during

Vonrhein et al. 1995] Vonrhein, C., Schlauderer, G.J., Schulz, G.E. Movie of the structural changes during a catalytic cycle of nucleoside monophosphate kinases. Structure 3 (1995) 483-490. 

Luminol (5-aminophthalazin-l,4-dione) [521-31-3] M 177.2, m 329-332°, pK] 3.37, pK2 6.35. Dissolved in KOH soln, treated with Norit (charcoal), filtered and ppted with cone HCl. [Hardy, Sietz and Hercules Talanta 24 297 1977.] Stored in the dark in an inert atmosphere, because its structure changes during its luminescence. It has been recrystd from O.IM KOH [Merenyi et al. J Am Chem Soc 108 77716 1986]. 

Corchnoy, S.B. et al.. Intramolecular proton transfers and structural changes during the photocycle of the LOV2 domain of phototropin, J. Biol. Chem., 278, 724, 2003. 

Scheme 8.4 The preparation step for Rh2/Si02 and the structural change during ethene hydroformylation.

Example IV The Thermal and Oxidative Isomerization of Tetraalkyl Substituted Tetrahedrane Clusters to Cyclobutadiene Derivatives. Other remarkable structural changes during redox reactions, i.e. charge redistributions enforced by the respective energy differences, are observed for cluster compounds (1). On... 

Figure 2. Crystallographic structure changes during leaching...

Landin M, Rowe RC, York P. Structural changes during the dehydration of calcium phosphate dihydrate. Eur J Pharma Sci 1994 2 245-252. 

An important feature of filled elastomers is the stress softening whereby an elastomer exhibits lower tensile properties at extensions less than those previously applied. As a result of this effect, a hysteresis loop on the stress-strain curve is observed. This effect is irreversible it is not connected with relaxation processes but the internal structure changes during stress softening. The reinforcement results from the polymer-filler interaction which include both physical and chemical bonds. Thus, deforma-tional properties and strength of filled rubbers are closely connected with the polymer-particle interactions and the ability of these bonds to become reformed under stress. 

In fungi, and in higher plants, the cell wall is a dynamic structure, changing during growth and differentiation, or in response to environmental factors. The main polysaccharides found in plant cell-walls are listed in this Section. The biosynthesis of those which are synthesized by way of lipid intermediates (see Table V) will be analyzed later. 

Yun, S.H. and Matheson, N.K. 1990. Structural changes during development in the amylose and amylopectin fraction separated by precipitation with concanavalin A of starches from maize genotypes. Carbohyd. Res. 270 85-101. 

Second, the correlation of change in enzymic activity with the titration of essential sulfhydryl groups has led to a postulation of eight active sites per 480,000 (56). Unfortunately, the possibility of structural changes during such titrations makes interpretation of such data equivocal. However, the observation that urease retained its activity in 8 M urea, where the molecular weight has been reduced at least to 90,000 (7), supports the conclusion above. 

Kress, M., Huxley, H. E., Faruqi, A. R., and Hendrix, J. (1986). Structural changes during activation of frog muscle studied by time-resolved X-ray diffraction./ Mol. Biol. 188, 325-342. 

Biphenyl structures and a-carbonyl-p-aryl ether structures, which are both assumed to be present in native lignin with a higher abundance than coniferyl alcohol structures (22,23) and both considered to be important leucochromophores, were not observed among die products, presumably because they are not present in spruce lignin as end groups. Both these types of structures are very stable and unlikely to be structurally changed during mild acid hydrolysis (24). 

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