Absorption study

Maiik i J and Trenary M 1989 infrared refieotion-absorption study of the adsorbate-substrate stretoh of CO on Pt (111) Surf. Sol. 214 L237-45... 

Bensasson R V, Bienvenue E, Dellinger M, Leach S and Seta P 1994 Cgg in model biological systems. A visible-UV absorption study of solvent-dependent parameters and solute aggregation J. Phys. Chem. 98 3492-5000... 

Tyliszczak T, Hitchcock A, Wu S, Chen A, Szymanski G and Lipkowski J 1998 X-ray absorption studies of mixed overlayers formed by copper adatom co-adsorbed with anions at the Au(111) electrode surface Synchrotron Radiat. News 11 31-8... 

Sheinker et al. thoroughly studied protomeric equilibria by a study of the infrared properties of 2-aminothiazoie and 2-imino-4-thiazoline derivatives (94, 105, 119). His results confirm that the amino form is predominant, a conclusion also drawn from the infrared absorption study of 2-anilinothiazole (120) and 2-heteroarylaminothiazoles (1569). 

Ij/Io)sca exp(- Tx) and (lt/Io)net exp[-(e + t)x] for the situations itemized above. The turbidity of a specimen, then, is experimentally equivalent to absorption, except it is a small (t < e), classical effect which is generally ignored in absorption studies. To prevent it from being overshadowed by absorption, we consider nonabsorbing systems for which e = 0. 

Infrared absorption studies have shown that correlates with an absorption at 3 p.m associated with an OH-stretching frequency (20). Indeed, infrared absorption provides a useful tool for evaluation in rapid production quaUty control. Infrared and other studies show that degradation is caused by proton inclusion in the grown quartz. 

The above stm study also discovered a facile transport of surface gold atoms in the presence of the Hquid phase, suggesting that the two-step mechanism does not provide a complete picture of the surface reactions, and that adsorption/desorption processes may have an important role in the formation of the final equiHbrium stmcture of the monolayer. Support for the importance of a desorption process comes from atomic absorption studies showing the existence of gold in the alkanethiol solution. The stm studies suggest that this gold comes from terraces, where single-a tomic deep pits are formed (281—283). 

Because of the nature of some applications in which chlorinated paraffins are used, skin contact is inevitable and therefore an important potential route into the body. Skin absorption studies (7) have shown that chlorinated paraffins are very poorly absorbed through the skin and should not cause significant systemic concentrations. 

Sub-picosecond photoinduced absorption studies were employed to demonstrate the speed of the photoinduced electron transfer. Upon addition of C(M to P30T, the P1A spectrum, decay kinetics, and intensity dependence all change dramatically 36J. Already at 1 ps after photoexcitation by a 100 fs pump pulse at... 

Lincar 1R absorption studies proved that there is no interaction between the conjugated- polymer backbone and the CWi molecule in the ground slate, as al-... 

Roentgen, definition of the, 248 Roentgen, W. C., discovery and investigation of x-rays by, 2, 9-12, 43 Nobel Prize awarded to, 2 production of secondary x-rays by, 12 x-ray absorption studies by, 11 x-ray papers of, 2... 

Infrared absorption studies of CO on platinum shows two bands near... 

EPA. 1990a. Endosulfan Review of four toxicology studies and three dermal absorption studies. Memorandum. Washington, DC U.S. Environmental Protection Agency, Office of Pesticides and Toxic Substances. Document no. 007937. 

Hoechst. 1986. A dermal absorption study in rats with 14C endosulfan (Alternative version of study report MRID no. 40040701). Conducted for American Hoechst Corporation, Somerville, NJ. WIL Laboratories, Inc., Ashland, OH. Project no. WIL-39028. [unpublished study]... 

The potentiostatic electrodeposition of iron selenide thin films has been reported recently in aqueous baths of ferric chloride (FeCb) and Se02 onto stainless steel and fluorine-doped TO-glass substrates [193], The films were characterized as polycrystalline and rich in iron, containing in particular a monoclinic FesSea phase. Optical absorption studies showed the presence of direct transition with band gap energy of 1.23 eV. 

Curcumin possesses strong antioxidant capacities, which may explain its effects against degenerative diseases in which oxidative stress plays a major role. As previously described for flavonoids, it is unlikely that curcumin acts as a direct antioxidant outside the digestive tract since its concentration in peripheral blood and organs is very low (near or below 1 pM, even after acute or long-term supplementation). Indeed, it has been shown that the intestinal epithelium limits its entry into the body, as reflected by absorption studies in various models (portal blood perfusion, everted bags). ... 

Westman, J. Boulanger, Y. Ehrenberg, A. Smith, I. C. P., Charge and pH dependent drug binding to model membranes A 2H-NMR and light absorption study, Biochim. Biophys. Acta 685, 315-328 (1982). 

Flash photolysis, ESR, and absorption studies of this photolysis have identified a transient species (leading to product) as a complex (Amax 410 nm, r 5 x 10-7 sec) between the triplet excited aromatic compound and its nucleophilic reaction partner. 

Absorption studies of 2-cyclohexenone-ethoxylethylene solutions failed to reveal evidence of donor-acceptor complex formation. It should be noted, however, that photocycloaddition from ground state 7r-complexes (such as would be observed from absorption studies) does not correctly predict the observed orientational effects. 

Sham, T.-K. X-Ray Absorption Studies of Liquids Structure and Reactivity of Metal Complexes in Solution and X-Ray Photoconductivity of Hydrocarbon Solutions of Organometallics, 145, 81-106(1987). 

A Aguiar, M Weiner. Percutaneous absorption studies of chloramphenicol solutions. J Pharm Sci 58 210, 1969. 

In Section III, emphasis was placed on flux kinetics across the cultured monolayer-filter support system where the passage of hydrophilic molecular species differing in molecular size and charge by the paracellular route was transmonolayer-controlled. In this situation, the mass transport barriers of the ABLs on the donor and receiver sides of the Transwell inserts were inconsequential, as evidenced by the lack of stirring effects on the flux kinetics. In this present section, the objective is to give quantitative insights into the permeability of the ABL as a function of hydrodynamic conditions imposed by stirring. The objective is accomplished with selected corticosteroid permeants which have been useful in rat intestinal absorption studies to demonstrate the interplay of membrane and ABL diffusional kinetics (Ho et al., 1977 Komiya et al., 1980). 

Ho NFH, JY Park, PF Ni, WI Higuchi. (1983). Advancing quantitative and mechanistic approaches in interfacing gastrointestinal drug absorption studies in animals and man. In WG Crouthamel, A Sarapu, eds. Animal Models for Oral Drug Delivery in Man In Situ and In Vivo Approaches. Washington, DC APh/APS, pp 27-106. 

Tables 3 and 4 list thermodynamic values calculated for polymorphs of chloramphenicol palmitate and mefenamic acid, respectively. Absorption studies of chloramphenicol palmitate in humans show that suspensions containing polymorph B of chloramphenicol palmitate gave blood levels approximately 10 times higher than those produced by suspensions of polymorph A [49], This may be due to the significant (-774 cal/mol) free energy difference between the polymorphs resulting in a substantial difference in their solubility and dissolution behavior. This theory is supported by the almost identical blood levels due to polymorphs I and n of mefenamic acid, which have a small free energy difference (-231 cal/mol) and similar solubility and dissolution behavior (Table 4).

Polyakov, N. E., V. V. Konovalov et al. (2001a). One-electron transfer product of quinone addition to carotenoids EPR and optical absorption studies. J. Photochem. Photobiol. A 141 117-126. 

Table 10.13 Metal ion content of six different cotton samples obtained by atomic absorption studies [236]...

Ungell, A.-L., In vitro absorption studies and their relevance to absorption from the GI tract, Drug Dev. Indust. Pharmacy 1997, 23, 879-892. 

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