Dimensional stabilization definition

Definition Thermoplastic fiber with exc. heat and chem. resist. easily melt processable exc. dimensional stability, creep resist., fatigue resist., abrasion/wear resist. high dielec. str. 

A well-accepted definition of nanocomposite material is that one of the phases has dimensions in the order of nanometers [51]. Roy et al. [52] present in their paper on alternative perspectives on nanocomposites a summary of features of particle properties when particle size decreases beyond a critical size. As dimensions reach nanoranges, interactions improve dramatically at the interfaces of phases, as do the effect of surface area/volume on the structure-property relationship of the material [53]. There is definite increase in the modulus of the material reinforced with composites, higher dimensional stability to thermal treatment, as well as enhanced barrier, membrane (conductive properties) and flame resistance. Thus, as Paul and Robeson [54] rightly put it, the synergistic advantage of nanoscale dimensions ( nano effect ) relative to larger-scale modifications is an important consideration ... 

Definition Ceramic material containing silica (sand) (75%), soda ash (20%), and lime (5%), often combined with metallic oxides the blend Is heated to fusion temps., then annealed to a rigid, friable state Properties Plate, sheet, fiber, flakes, filament, fabric, rods, tubing, pipe, powd., beads, flakes, or hollow spheres sp.gr. 2.5 hardness (Mohs) 5.5 high str., dimensional stability, heat and chem. resist. 

The three-dimensional conformation of a protein is called its tertiary structure. An a-helix can be either twisted, folded, or folded and twisted into a definite geometric pattern. These structures are stabilized by dispersion forces, hydrogen bonding, and other intermo-lecular forces. 

Disulfide bridges are, of course, true covalent bonds (between the sulfurs of two cysteine side chains) and are thus considered part of the primary structure of a protein by most definitions. Experimentally they also belong there, since they can be determined as part of, or an extension of, an amino acid sequence determination. However, proteins normally can fold up correctly without or before disulfide formation, and those SS links appear to influence the structure more in the manner of secondary-structural elements, by providing local specificity and stabilization. Therefore, it seems appropriate to consider them here along with the other basic elements making up three-dimensional protein structure. 

M-W. Evans C.M. Ablow, Chem Revs 61 (1961), p 147 (Definition of term detonation wave) p 152 (Steady detonation waves in real fluids) p 157 (Cylindrically symmetric flow in the steady zone of detonation wave) p 159 (Spherically symmetric flow in the steady zone of detonation wave) p 166 (Stability of detonation waves in which reaction is not complete) p 167 (One- dimensional transient reaction waves) 172,... 

Remark 1 The above definition of stability does not depend on the particular norm [y that is used, In fact, it is necessary and sufficient to consider a one- dimensional choice ofy. 

The interest in semiconductor QD s as NLO materials has resulted from the recent theoretical predictions of strong optical nonlinearities for materials having three dimensional quantum confinement (QC) of electrons (e) and holes (h) (2,29,20). QC whether in one, two or three dimensions increases the stability of the exciton compared to the bulk semiconductor and as a result, the exciton resonances remain well resolved at room temperature. The physics framework in which the optical nonlinearities of QD s are couched involves the third order term of the electrical susceptibility (called X )) for semiconductor nanocrystallites (these particles will be referred to as nanocrystallites because of the perfect uniformity in size and shape that distinguishes them from other clusters where these characteriestics may vary, but these crystallites are definitely of molecular size and character and a cluster description is the most appropriate) exhibiting QC in all three dimensions. (Second order nonlinearites are not considered here since they are generally small in the systems under consideration.)... 

By using very thin samples, the oven aging of polypropylene can be appreciably accelerated. Specimens of definite and reproducible shape and thickness were made by using a microtome. The first phase of the work evaluated the influence of sample thickness from 0.2 to 12 mils on oven life at different temperatures. In the second phase, this modified technique was used to study the effectiveness of three anti-oxidant/DLTDP systems as thermal stabilizers for polypropylene. The results obtained over a wide spectrum of antioxidant/DLTDP combinations are shown in three-dimensional graphs. 

The data given above definitely prove also the metastable character of the CBF/NBF transition and provide the experimental base for further quantitative explanation of this process. The transition to NBF can be regarded as a transition to bi-dimensional state. For instance, the process of grey film/NBF transition in films stabilised by non-ionic surfactants and CBF/NBF transition in films stabilised by ionic surfactants can be presented as a nucleation process of a new phase. So far this approach is applied only to analyse the stability of NBF (see Section 3.4.4). 

The importance of viewpoint and the apparent chaotic nature of ecological systems make discussion of such parameters as ecosystem stability difficult to determine accurately. In Figure 11.32 a system that hits a perturbation is depicted. Although the distances that each have traveled are the same in a two-dimensional picture, from the viewpoint of the observer one system moves farther than the other and by some definitions is less stable. Conversely, if the chaotic nature of systems prevents a return to the original state, recovery cannot be considered an inherent property of the system. 

Cytokines have very stable structures with the presence of carbohydrates and disulfide bonds imparting solubility, stability, and resistance to cleavage. Despite the lack of amino acid sequence similarity, the limited variation in their overall three-dimensional structure may reflect the evolutionary origins of cytokines. This structural variation has made possible the definition of at least the following four different structural families. ... 

---