Relaxation chemical

Therapeutic Function Skeletal Muscle Relaxant Chemical Name N,N -DiallYlnortoxiferinium DIchloride... 

Therapeutic Function Skeletal muscle relaxant Chemical Name 5-chloro-2(3H)-benzoxazolone Common Name 5-chloro-2-hydroxybenzoxazole Structural Formula ... 

Therapeutic Function Smooth muscle relaxant Chemical Name Theophylline cholinate Common Name Oxotriphylline oxytrimethylline... 

Therepeutic Function Analgesic, skeletal muscle relaxant Chemical Name a-[ (2-Pyridinylemino)methyl] benzenemethenol Common Name Feny ram idol Structural Formula ... 

In this chapter, we will introduce a new level of theoretical tools—the density matrix— and show by a bit of matrix algebra what the product operators actually represent. The qualitative picture of population changes in the NOE will be made more exact, the precise basis of cross-relaxation will be revealed, and a new phenomenon of cross-relaxation— chemical exchange—will be introduced. With these expanded tools, it will be possible to understand the 2D NOESY (nuclear Overhauser and exchange spectroscopy) and DQF-COSY experiments in detail. 

In the internal MEC case, all populational derivatives = 0 for the initial global equilibrium. Therefore, fim = 0 also in the REC description for a given partitioning, Melectron distribution corresponds to the global equilibrium then too, ijf> = dEjdz = (pfp = P Thus, the representative REC chemical potential pf > for the M(k) partitioning, representing the relaxed chemical potential of atom k, is also at the initial global chemical potential level. 

The combination formula for pcr in terms of the relaxed chemical potentials of constituent atoms,... 

Relaxation is a complex phenomenon, depending on many factors [2], such as dipole-dipole relaxation, chemical shift anisotropy, spin-rotation relaxation, quad-rupolar relaxation etc. Examples for macroscopic factors are sample and magnetic field homogenity and the viscosity of the NMR solvent. When running NMR experiments on ionic liquids, we have to deal with three main challenges ... 

We now return to discussing some other relaxation mechanisms which involve random motions of molecules, namely the scalar relaxation of the first and second kinds, quadrupolar relaxation, chemical shift anisotropy relaxation, and spin rotation relaxation. 

Therapeutic Function Muscle relaxant Chemical Name N,l,5-trimethyl-4-hexenylamine Common Name Methyl isooctenylamine Structural Formula NHCHs... 

It follows from Table 7 that the carbon relaxed chemical potentials correctly predict the meta-directing influence of typical electron withdrawing substituents, X = CN, NO2, COOH, CF3, although the differences in xc values are very small indeed. Again, a more emphasized meta-directing preference can be seen in the list of FF data (Table 8). 

In excised uteruses, eucommia dose-dependently relaxed chemically induced uterine stimulation and contraction. Processed eucommia was more active than unprocessed eucommia (Wang et al. 1989). 

Chemical shifts are the principle source of experimental information obtainable in an NMR experiment, and to date they have been the most used. [The other sources of information to be discussed below relate to spin-spin coupling and relaxation.] Chemical shifts are frequently characteristic of a particular environment (e.g. methyl proton resonances occur at about 1 ppm downfield from the tetramethylsilane proton resonance (TMS), while aromatic protons occur about 7 ppm down-field). 

Fast time-dependent processes are of particular interest in NMR spectroscopy since it is a technique which measures the sum of nuclear behaviour over about lO to 10" s. Kinetic processes contribute to NMR spectra in some fashion or other, frequently drastically modifying both relaxation, chemical-shift and spin-coupling measurements. 

We discuss here only diamagnetic ion interactions. In certain circumstances the presence of a paramagnetic ion gives additional information (sect. 4.25). Ion association may modify any or all of the usually measured NMR parameters viz, relaxation, chemical shifts and spin-spin couplings. 

Manufacturer Baxter Healthcare Corporation, Deerfield, IL 60015 Class muscle relaxant Chemical Structure see Figure 91.1... 

Chemicals Agent Used as Hair Relaxers Chemical irritant/corrosive agents that are used as hair relaxers are more extensively described in Sect. 4.12. 

Anisotropy of shielding, 40,375,397,399-400,462,505-507 also see Relaxation, chemical shielding anistropy Anthraquinone derivative, 367-68 Antimony... 

Chemical shielding anisotropy see Relaxation, chemical shielding anisotropy Chemical shift anisotropy see Relaxation, chemical shielding anisotropy Chemical shifts... 

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