Mobility mechanical

In most types of smooth muscle cells (SMCs), stimulation of G protein-coupled receptors (GPCRs) results in a large Ca2+ transient and a sustained increase in intracellular Ca2+ concentration, which are thought to be mediated by inositol-1,4,5-trisphosphate (L1SP3)-mediated Ca2+ release and accompanying transmembrane Ca2+ entry, respectively. Various experimental techniques and protocols have revealed that although there appear to be some differences in the extent of their contribution, at least three distinct Ca2+-mobilizing mechanisms can... 

If nuclei or their surroundings have any mobility, the resonance fine will narrow and become Lorentzian in shape. The cause of this behaviour is an averaging process of the components of the field gradient tensor. Quantitative considerations of the mobility mechanisms in zeolites are difficult to make and are beyond the scope of this article. 

Brikowski, T.H., Leybourne, M., Shrestha, S.D. et al. (2006) Geochemical indicators of groundwater arsenic mobilization mechanisms in the Ganges floodplain of Nepal. Abstracts with Programs. The Geological Society of America, 38(1), 8. 

The self-diffusion coefficient for long chains is proportional to M 1 and is small. In this situation, however, a competing mobility mechanism gives a different dependence of the diffusion coefficient on the length of the macromolecule. This will be discussed further in this section. 

Chen, B., Ivanov, I., Park, J. M., Parrinello, M., and Klein, M. L., Solvation structure and mobility mechanism of OH a Car-Parrinello molecular dynamics investigation of alkaline solutions. J. Phys. Chem. B 106, 12006-12016 (2002). 

Biol. Chem. 269, 15957-15960, 1994 Lawrence, D.A., The role of reactive-center loop mobility in the serpin inhibitory mechanism, Adv. Exp. Med. Biol. 425, 99-108,1997 Whisstock, J., Skinner, R., and Lesk, A.M., An atlas of serpin conformations. Trends Biochem. Sci. 23, 63-67, 1998 Gettins, P.G., Serpin stractnre, mechanism, and fnnction, Chem. Rev. 102, 4751 804, 2002 Hnntington, J.A., Shape-shifting serpins — advantages of a mobile mechanism. Trends Biochem. Sci. 31, 427 35, 2006. 

With calving, the mother cow tends to stop eating. Hence, the diet may no longer be a reliable source of calcium at the onset of lactation. This leaves the bones as a source of calcium. The body requires a period of adjustment to activate the calcium-mobilizing mechanisms. The prior consumption of high-calcium foods leaves these mechanisms in the nonactivated state. The sudden change from a... 

Serfes, M. R, Spayd, S. E., Herman, G. C., and Monteverde, D. R, 2000, Arsenic occurrence, source and possible mobilization mechanisms in ground water of the Piedmont physiographic province in New Jersey EOS Transactions, AGU Fall Meeting Supplement, v. 81, p. 525. 

D. Steinberg, Fatty acid mobilization -mechanisms of regulation and metabolic consequence, Biochem. Soc. Symp., 1963, 24, 111-138. 

We computed three quantities for the examination of water mobility in the solutions, which provide an increasing level of detail on the mobility mechanism (i) the mean square displacement (r (t) = r t) — r(O)P), where the average. ..) is over the trajectory and all water molecules, (ii) the van Hove self-correlation function, Gs(r,t), which indicates the probability for... 

Scale of Element Perturbation Global Reg. Local Diagnostic Environments Mobilizing Mechanisms Critical Pathway... 

The phosphorus nutrition of plants is favoured by phosphorus mobilization mechanisms taking place in the rhizosphere. Among these mechanisms, the role of mycorrhizas is of prime importance (Mousain et al., 1997). There are nevertheless some controversial interpretations of the nature of these positive effects regarding the role of phosphohydrolases (also see Richardson et al., Chapter 8, this volume). 

The mobilization of soil phosphorus is the first key step in the transfer process. The conceptual separation of release mechanisms from transport factors allows these processes to be studied independently (Fig. 12.1), based on the assumption that all mobilization mechanisms can potentially contribute to phosphorus transfer if they are coincident with hydrological movement. 

For constracting mobile mechanical devices, molecular surfaces need to be engineering. The controlled and reversible telescopic extension of multiwaU nanotubes was demonstrated, realizing ultralow-friction nanoscale linear bearings and constant-force nanosprings. Measurements performed in situ on individual custom-engineered nanotubes inside a high-... 

Values of t lower than 10 ( 10 -10 s) imply an activation entropy greater than zero, being associated with more complex mobility mechanisms for which the activation energy could be of the order of 160 - 210 kJ mof , as is the case for die P relaxation in polysaccharides [75,76] and in polymers where the conformational mobility of the main chain is severely restrict [77]. For the lowest members of the poIy( -alkyl methacrylates) series, activation energies of between 79 and 96 kJ mol were found for the p process that, as already mentioned, is accompanied by restricted rearrangements of the main chain. For longer poly(w-alkyl methacrylates) the relaxation process is more localized with a lower activation energy value (e.g. 21 kJ mof for PnLMA [73]). 

K. Sieradzki, F.J. Friedersdorf, Notes on the surface mobility mechanism of stress-corrosion cracking, Corros. Sci. 36 (1994) 669-676. 

In recent years, carbon nanotubes (CNTs) and graphene have been extensively studied due to their outstanding electron mobility, mechanical strength and large specific surface area [1]. These properties make them attractive in a wide variety of applications ranging from sensors and actuators [2], catalysts [3], batteries... 

The explosive valves used in the liquid poison injection system in BWRs have the characteristic of not being subject to leaks as their closure is ensured by a membrane which is destroyed by the explosive charge. They, moreover, have a high reliability because of the absence of mobile mechanical parts. Operating experience, however, indicates a certain number of cases where the electric connections for their actuation were erroneously made, making the valve inoperable. If this mistake is due to erroneous installation instructions, then the latter comprise a dangerous common cause failure. 

As pointed out in [14], vertical handover can cause radical changes in QoS. Hence, it is important that as much control as possible is exercised by mobile devices to achieve optimum vertical handover. It is therefore necessary to develop new techniques which could make other layers of the protocol stack aware of impending handover decisions and, thus, allow them to take steps to minimize the effects. So a new QoS Framework is required which must be integrated with mobility mechanisms such as handover. 

Entrapment and mobilization mechanisms at low flow rates and low interfacial tension can also control the recovery obtained by tertiary methods. In micellar flooding, for example, high ratios of viscous to capillary forces arise at field flow rates when interfacial tensions are very low. Development of a continuous oil bank having significant mobility requires that discontinuous oil be mobilized to form a continuous bank which gathers more residual oil as it advances. Interfacial tensions may exist or develop between the micellar bank and the oil, or between the micellar fluid and the aqueous polymer bank used to push the micellar fluid. Entrapment of oil by the micellar bank, or of micellar fluid by the polymer bank would eventually cause the process to fail. 

It should be kept in mind that conventional AIMD simulation techniques, both BOMD and CPMD, are not able to describe all types of dynamics encountered in chemistry. One thing they lack is an ability to handle dynamics that can only be explained with frill quantum mechanics. Proton tunneling and ion dispersion, for example, are purely quantum effects that can play a fundamentally important role in biological systems, in polymer electrolyte fuel cells, and in many other water-containing systems. In fact, the commonly accepted mobility mechanism is the so-called stmctural diffusion or Grotthuss mechanism, in which solvation stmctures diffuse through the hydrogen bond network via sequential proton transfer reactions. 

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