Donor-receptor

Shah et al. [51] demonstrated the use of a donor-receptor compartment apparatus separated by a cell monolayer to estimate membrane transport parameters. Permeability coefficients, P, were calculated as... 

Fig. 12 Left. ICT-PET probe 34 with a small and rigid spacer (thick black), decoupling the PET active donor = receptor unit from the 7c-conjugated ICT fluorophore. Middle and right probes 35 and 36 combining a conventional ICT and a virtually decoupled ICT process with two identical receptor units (35, for Hg2+) and two different receptor units (36, tetraoxa monoaza crown for Na+ and dithia monooxa monoaza crown for Ag+). For color code, see Fig. 10...

Li YQ, Bricks JL, Resch-Genger U et al (2006) Bifunctional charge transfer operated fluorescent probes with acceptor and donor receptors. 2. Bifunctional cation coordination behavior of biphenyl-type sensor molecules incorporating 2, 2 6, 2"-terpyridine acceptors. J Phys Chem A 110 10972-10984... 

PO 6, Hollister, Calif, 95023) consists of a stainless steel, hollow, cylindrical body ca 1.67-inches long, which can be hermetically closed. It contains three charges donor, receptor, and main chge, all of them secondary HE compns. Complete elimination of primary expl compns makes these devices safer to handle than other types of initiators. The main chge generates 3900 to 4500 psi within 0.4 millisecs in a closed volume of 10 cc. The method of initiating the TBI was not reported... 

The pharmacological efficacy of adamantane derivatives may be attributed to several factors. The high lipophilic character associated with high molecular weight hydrocarbons appears to be coupled with a highly precise and specific donor-receptor interaction between adamantane and the receptor proteins. Addition of methyl groups to the adamantane nucleus apparently destroys the precision with which the adamantyl group fits into the receptor site 346> 347). 

The first attempts to marshal a multiple number of Lewis acidic tin centers in order to create a receptor specifically for the purpose of binding anions were made by Newcomb and co-workers (67). In 1984 they reported the synthesis of several tin based macrocycles (e.g., 13 and 14), the first macrocycles to contain Lewis acidic acceptor groups rather than lone-pair donors. Receptor 13 was available in gram quantities making it an ideal receptor for anion-binding in-... 

Studies of complexes of iodine with imidazoles have demonstrated that the 1 1 charge transfer complexes are of the n-a type with donation of the electron pair from N-3. Formation constants determined for the complexes with 1-methylimidazole, methimazole, and clotrimazole indicate strong donor-receptor interaction, implying an expected effect on thyroid metabolism of these imidazoles <83BSB923, 86H(24)1955>. 

FIG. 20 Concentration profiles of HQ above Nation-filled pores in mica membranes. The data correspond to passive diffusion (iapp = 0 /xA, squares) and ionto-phoretic transport (iapp = 50 /xA, triangles). The solid lines represent best fits of Eq. (10) to the data, obtained by varying the parameters Cs and a. The concentrations of NaCI in the donor/receptor compartments are indicated on the figure. The concentration of HQ in the donor compartment is 0.2 M in all experiments. (From Ref. 10.)... 

A similar result has been reported. It is known that transition metal chlorides enter into graphite layer lattice and lose activity for catalyst system including graphite because of chlorine atom is bringed in transition metal during the reduction process of these compounds. Although transition metal can be activated by potassium in the anunonia synthesis, these conclusions are obtained from the study of the addition of potassium in electron donor receptor such as graphite or phthalocyanine. ... 

As a first step in imderstanding the analysis of energy transfer experiments, it is wortliwhile to summarize tire steps in a typical experiment where CgFg is tire hot donor and carbon dioxide is tire bath receptor molecule. First, excited... 

Example If a drug molecule interacts with a receptor molecule through hydrogen bonds, then yon might restrain the distance between the donor and acceptor atoms involved in the hydrogen bonds. During a molecular dynamics simulation, these atoms would slay near an ideal value, while the rest of the molecular system fully relaxes. 

Fig. 11. Receptor molecules (cryptands) having hetero (nonoxygen) donor atoms (7) or endo-functional acidic sites (8) in the framework.

Full-color printing requires pages be reprinted three or four times in registration. Receptors pass over the printhead several times at exactiy the same speed and location, but contact a differentiy colored section of donor. A fourth pure black color can improve dark picture regions, sharpen text and line art, and mask color misregistration. 

Transfer occurs by sublimation, condensation, and diffusion (101). Printhead thermal dissipation causes donor dye to travel to the surface of the donor ribbon and convert directiy to a gas. Colorant puffs immediately strike the nearby receptor and soak in, assisted by residual printhead heat. 

Fig. 9. Sweetener receptor binding sites postulated by Tinti and Nofre, where 5 is an anionic group, eg, CO 2y or CN a hydrogen bond donor...

The enantiophore query used in the search is derived from the CSP and directly built from a 3D structure model of the target CSP molecule, as it can be used today for the determination of new lead compounds [20, 21]. This procedure does not need an important modeling expertise. One can easily recognize the different center types in the receptor in question. These can be hydrogen-bond donors and acceptors, charged... 

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