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Field irradiating

Clinically, GM-CSF or G-CSF have been used to accelerate recovery after chemotherapy and total body or extended field irradiation, situations that cause neutropenia and decreased platelets, and possibly lead to fatal septic infection or diffuse hemorrhage, respectively. G-CSF and GM-CSF reproducibly decrease the period of granulocytopenia, the number of infectious episodes, and the length of hospitalization in such patients (152), although it is not clear that dose escalation of the cytotoxic agent and increased cure rate can be rehably achieved. One aspect of the effects of G-CSF and GM-CSF is that these agents can activate mature cells to function more efficiently. This may, however, also lead to the production of cytokines, such as TNF- a, that have some toxic side effects. In general, both cytokines are reasonably well tolerated. The side effect profile of G-CSF is more favorable than that of GM-CSF. Medullary bone pain is the only common toxicity. [Pg.494]

The photochemical addition of trifiuoroiodomethane to unsaturated systems has been thoroughly investigated by Haszeldine. Little use has been made of this reaction in the steroid field. Irradiation of the enol ether (64) in trifiuoroiodomethane containing pyridine in a quartz vessel furnishes in 60 %... [Pg.470]

Treatment with these doses of radiotherapy involves toxicity. Both acute and late effects of radiotherapy occur. Acute effects of mantle-field irradiation include nausea, vomiting, anorexia, xerostomia, dysguesia, pharyngitis, dry cough, fatigue, diarrhea,... [Pg.1377]

During an rf-field irradiation, the Hamiltonian governing a quadrupolar spin system can be written in the rotating frame as... [Pg.132]

Jenkin D, Chan H, Freedman J, et al. Hodgkin s disease in children treatment results with MOPP and low-dose, extended-field irradiation. Cancer Treat Rep 1982 66 949-959. [Pg.211]

In a very important study of the quartet-doublet reactivity question,72 it was found that ligand-field irradiation of [Cr(CN)6]3 in degassed dimethylformamide results in both phosphorescence from the doublet and substitution of cyanide. In air-saturated solution, however, phosphorescence is quenched completely while the photoreaction is unaffected. The two processes appear to be uncoupled and thus originate from different excited states. The most straightforward conclusion is that the lowest quartet excited state in [Cr(CN)6]3 is the sole precursor to photoreaction. [Pg.398]

Since the SSE system by itself is essentially one-dimensional and autonomous, there is no chaos in this system. Even exposing the surface state electrons to weak microwave radiation does not change the situation. As a matter of fact, exposure to weak microwave fields was discussed above in connection with the spectroscopy experiments by Grimes and Brown (1974). In these experiments the microwave fields were defiber-ately chosen to be weak in order not to disturb the SSE system too much. Weak-field irradiation does not produce chaos, but results in regular absorption fines. [Pg.160]

An examination of the photolysis of trans-[Cr(NH3)4(H20)(NCS)Hg], produced from trtms-[Cr(NH3)4(H20)(NCS)f (1) by interaction with Mg, and of (1) itself, has shown that only cis-[Cr(NH3)4(H20)2] is formed. Emission activation energies have been determined for [Cr(NH3)5CN] and trans-[Cr(NH3)4(CN)2p and ligand field irradiation of cis-[Cr(NH3)4(CN)2] in acid solution leads to aquation of NH3 and CN in a process whose quantum yields are wavelength dependent. The product [Cr(NH3)3(H20)(CN)2] consists of a mixture of l,2-CN-3-H20 and l,2-CN-6-H20, the composition of which is determined by the ligand-field band excited. A E state is thought to be involved, and either a dissociative (symmetry restricted) or associative (edge displacement) mechanism operates. ... [Pg.168]

Patients with localized aggressive lymphomas can be cured with several cycles of cyclophosphamide, hydroxy-daunomycin (doxorubicin), vincristine (Oncovin), and prednisone (CHOP) chemotherapy and involved-field irradiation. Patients with bulky stage II, stage III, or stage IV aggressive lymphomas can be cured of their disease with CHOP chemotherapy. The addition of rituximab to CHOP (R-CHOP) is used by many centers in place of CHOP. [Pg.2439]

Now let us consider the power required to saturate a Rydberg transition. This can be obtained by saying that the monochromatic field irradiating the atom must produce a nutation frequency for the atomic dipole, qao, equal to the radiative decay rate, i.e-. [Pg.214]

Basic studies on plasmons and their related materials will influence wider research areas in fundamental and applied fields. Among them, applications of plasmonic optical fields to photochemical reactions have a large impact in photo-and material-sciences. For instance, the interaction between localized optical (or plasmon) fields with molecular electronic wavefunctions may enhance photochemical reaction rates, which is sometimes forbidden under the far-field irradiation of light. It has a potential to open up new chemical reaction routes beyond the dipolar approximation. Such novel photochemical reactions shed new light on photo- and material-sciences. [Pg.157]

The most obvious merit of the technique being described is that the interferometer has great inherent accuracy combined with the high sensitivity and resolution (see below). Additionally, a few other advantages of this method must be mentioned. Thus, LICRM needs no calibration, and the mechanical contact of a specimen with the measuring scheme is excluded. It means that the measurement process itself does not affect the result obtained. LICRM is an inertia-less instrument. The linear dependence between deformation and signal characteristics is retained at any displacement (deformation), and the continuous information of the indicated types can be obtained in the course of the experiment. Insensitivity of a laser beam to the external influence, such as electric and magnetic fields, irradiation, etc., is also essential in some cases. [Pg.85]

There have been several reviews of mechanisms of photosubstitution in rhodium(III) complexes. Bond indexes for ground and excited states have been discussed in relation to D2h species. " The observation of stereospecificity has been discussed in relation to lifetimes for triplet singlet deactivation and geometric rearrangements. Direct evidence has been presented to support the intermediacy of, and role of rearrangement in, five-coordinate intermediates in ligand field irradiation experiments. Rhodium(III) has been discussed in relation to cobalt(III) and iridium(III), and to ruthenium(II) and ruthenium(III) as well. ... [Pg.210]

In harmonic crystals, the vibrations are phonons, i.e. plane waves involving the motion of all atoms in the sample. Phonons are described by a frequency illuminated volume seen by the detector, and fields irradiated by aU polarizable units interfere. As a consequence, one phonon scattering processes (first-order Raman scattering) are subjected to the selection rules ... [Pg.777]

Ligand field irradiation of chromium(III) complexes leads primarily to substitution reactions/ The most common reaction in aqueous solution is photosubstitution of a ligand by water. One of the earliest studies of photoaquation reactions was the light-induced exchange of water between Cr(H20) and the solvent. The reaction is followed by using isotopically labeled H2O as the solvent, where sequential photosubstitution of the H2O molecules leads to the formation of Cr(H20 )6 (Ref.3) ... [Pg.27]

Magnetic Field Electric Field Irradiation Temperature... [Pg.127]


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See also in sourсe #XX -- [ Pg.199 ]

See also in sourсe #XX -- [ Pg.199 ]

See also in sourсe #XX -- [ Pg.199 ]




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